Reactions Sentence Examples
While everyone heard the same noise, their reactions differed.
They're being influenced by your reactions.
Later, another group will test the results and record the reactions.
The aromatic aldehydes resemble the aliphatic aldehydes in most respects, but in certain reactions they exhibit an entirely different behaviour.
Repair Of Injuries In the process of inflammation we have a series of reactions on the part of the tissues, and fluids of the body, to counteract the ill effects of irritation or injury, to get rid of the cause, and to repair its results.
The dominant forms result from crustal movements, the subsidiary from secondary reactions o during the action of the primitive forms on mobile distri butions.
By his insistence upon the use of the balance as a quantitative check upon the masses involved in all chemical reactions, Lavoisier was enabled to establish by his own investigations and the results achieved by others the principle now known as the " conservation of mass."
We may here notice the important chemical symbolism or notation introduced by Berzelius, which greatly contributed to the definite and convenient representation of chemical composition and the tracing of chemical reactions.
Gerhardt attempted a solution by investigating chemical reactions.
This link was the full extension of Avogadro's theory to all substances, Cannizzaro showing that chemical reactions in themselves would not suffice.
AdvertisementThe combination, as it is ordinarily termed, of chlorine with hydrogen, and the displacement of iodine in potassium iodide by the action of chlorine, may be cited as examples; if these reactions are represented, as such reactions very commonly are, by equations which merely express the relative weights of the bodies which enter into reaction, and of the products, thus Cl = HC1 Hydrogen.
Balard discovered chlorine monoxide in 1834, investigating its properties and reactions; and his observations on hypochlorous acid and hypochlorites led him to conclude that " bleaching-powder " or " chloride of lime " was a compound or mixture in equimolecular proportions of calcium chloride and hypochlorite, with a little calcium hydrate.
Similarly he represented the reactions investigated by Liebig and Wehler on benzoyl compounds as double decompositions.
It is necessary, therefore, to avoid reactions involving such intermolecular migrations when determining the orientation of aromatic compounds.
Hitherto we have generally restricted ourselves to syntheses which result in the production of a true benzene ring; but there are many reactions by which reduced benzene rings are synthesized, and from the compounds so obtained true benzenoid compounds may be prepared.
AdvertisementIt must be mentioned here that the reactions of any particular substance are given under its own heading, and in this article we shall only collate the various operations and outline the general procedure.
Some of these insoluble compounds can be detected by their colour and particular reactions.
It is unnecessary here to dwell on the precautions which can only be conveniently acquired by experience; a sound appreciation of analytical methods is only possible after the reactions and characters of individual substances have been studied, and we therefore refer the reader to the articles on the particular elements and compounds for more information on this subject.
The reactions are represented as (I) N2+3H2+2C0 -1-2H 2 0=2H CO 2 NH 4 (Ammonium formate).
They give the biuret and xanthoproteic reactions, and form salts with both acids and bases.
AdvertisementThey are loose, white, non-hygroscopic powders, soluble in water and salt solutions, and have an acid reaction; they give the colour reactions of albumins.
The mucins and mucoids belong to this group; they are acid and contain no phosphorus; they give the albumin colour reactions but are not coagulated by heat.
It is an albumin, and not a carbohydrate as was formerly held; and gives most of the colour reactions of albumins.
Moreover, a study of the chemical relations of electrolytes indicates that it is always the electrolytic ions that are concerned in their reactions.
Thus neither a chlorate, which contains the ion C103, nor monochloracetic acid, shows the reactions of chlorine, though it is, of course, present in both substances; again, the sulphates do not answer to the usual tests which indicate the presence of sulphur as sulphide.
AdvertisementSecondary reactions take place at the same time, yielding more particularly hydrocarbons of the paraffin series.
But his best known contribution to general chemistry is his work on the phenomena of reversible reactions, which he comprehended under a general theory of " dissociation.
Usually the cytoplasm shows a marked affinity for the acid stains, but the different bodies found in the cell may show great variation in their staining reactions.
The fat in this condition is readily recognized by the usual microchemical and staining reactions.
The reaction with iodine is seen best by direct light; the reactions with the other substances are visible only by transmitted light.
Oddi does not regard it as the essential constituent of amyloid, chiefly because the colour reactions are forthcoming in the residuum after the substance has been removed, while the substance itself does not give these reactions.
Thus Krawkow and Nowak, employing the frequent subcutaneous injection of the usual organisms of suppuration, have induced in the fowl the deposition within the tissues of a homogeneous substance giving the colour reactions of true amyloid.
When hardened in spirit, however, the greater part of this experimental amyloid in the fowl vanishes, and the reactions are not forthcoming.
These are peculiar bodies which are found in the prostate, in the central nervous system, in the lung, and in other localities, and which get their name from being very like starch-corpuscles, and from giving certain colour reactions closely resembling those of vegetable cellulose or even starch itself.
It further resembles true amyloid in giving all its colour reactions.
Now, what is remarkable in these and many other reactions is not only that effects apparently very opposite may result from minute differences of molecular construction, but also that, whatever the construction, agents, not wholly indifferent to the body or part, tend to anchor themselves to organic molecules in some way akin to them.
It is convenient here to add that such reactions and modifications, if more conspicuous in the nervous system, are of course not confined to it, but are concerned in their degree in all the processes of metabolism, being most readily traced by us in the blood.
They show all the reactions of esters, being readily hydrolysed by caustic alkalis, and reacting with ammonia to produce carhamic esters and urea.
Of the heavy metals, copper is the one which exhibits by far the greatest avidity for sulphur, its subsulphide Cu 2 S being the stablest of all heavy metallic sulphides in opposition to dry reactions.
These reactions permit the transformation of an aldose into a ketose; the reverse change can only be brought about by reducing the ketose to an alcohol, and oxidizing this compound to an aldehyde.
The present article, as explained under Electrochemistry, treats only of those processes in which electricity is applied to the production of chemical reactions or molecular changes at furnace temperatures.
The furnace used by Henri Moissan in his experiments on reactions at high temperatures, on the fusion and volatilization of refractory materials, and on the formation of carbides, suicides and borides of various metals, consisted, in its simplest form, of two superposed blocks of lime or of limestone with a central cavity cut in the lower block, and with a corresponding but much shallower inverted cavity in the upper block, which thus formed the lid of the furnace.
In these processes the electric current is used solely to generate heat, either to induce chemical reactions between admixed substances, or to produce a physical (allotropic) modification of a given substance.
If, however, no porous division be used to prevent the intermingling by diffusion of the anode and cathode solutions, a complicated set of subsidiary reactions takes place.
Again, anode reactions, such as are observed in the electrolysis of the fatty acids, may be utilized, as, for example, when the radical CH3C02 - deposited at the anode in the electrolysis of acetic acid - is dissociated, two of the groups react to give one molecule of ethane, C 2 H 6, and two of carbon dioxide.
There are certain reactions, however, in which oxidation can be successfully applied to the synthesis of acids.
Of foremost importance are the reactions termed the malonic acid and the aceto-acetic ester syntheses; these are discussed under their own headings.
Torbern Olof Bergman reinvestigated its properties and determined its reactions; his account, which was published in his Opuscula, contains the first fairly accurate description of the metal.
When A is held still, and B rotated, centrifugal action sets up vortex currents in the water in the pockets; thus a continuous circulation is caused between B and A, and the consequent changes of momentum give rise to oblique reactions.
The moments of the components of these actions and reactions in a plane to which the axis of rotation is at right angles are the two aspects of the torque acting, and therefore the torque acting on B through the shaft is measured by the torque required to hold A still.
The Stahlian theory, originally a theory of combustion, came to be a general theory of chemical reactions, since it provided simple explanations of the ordinary chemical processes(when regarded qualitatively) and permitted generalizations which largely stimulated its acceptance.
Modern research has proved that such reactions are not occasioned by water acting as H 2 0, but really by its ions (hydrions and hydroxidions), for the velocity is proportional (in accordance with the law of chemical mass action) to the concentration of these ions.
In finding the line of pressure some principle such as the principle of least action must be used in determining the reactions at the crown and springings, and some assumptions must be made of not certain validity.
In finding the abutment reactions some principle such as the principle of least action must be used, and some assumptions of doubtful validity made.
The reactions at the abutments are R 1 = Wm/1 and R2 = W (l - m)/l.
A / / is wl; the reactions at abutments, R I = R2 = 2w/.
The sum of the two upward vertical reactions must clearly be equal to the sum of the loads.
In chemistry the term is given to chemical reactions in which a substance decomposes into two or more substances, and particularly to cases in which associated molecules break down into simpler molecules.
The aqueous solution of ammonia is very basic in its reactions, and since it is a weak electrolyte, one must assume the solution to contain a certain amount of ammonium hydroxide NH 4 OH, although it is probably chiefly composed of a solution of ammonia in water.
It was obtained as a by-product in many chemical reactions, and subsequently used to be extracted from kainite, one of the Stassfurt minerals, but the process is now given up because the salt can be produced cheaply enough from the chloride by decomposing it with sulphuric acid and calcining the residue.
In 1775 he investigated arsenic acid and its reactions, discovering arseniuretted hydrogen and "Scheele's green" (copper arsenite), a process for preparing which on a large scale he published in 1778.
The acid cannot be prepared by the action of concentrated sulphuric acid on an iodide on account of secondary reactions taking place, which result in the formation of free iodine and sulphur dioxide.
Its aqueous solution is not an electrolyte, and consequently does not give the reactions of the mercury and cyanogen ions.
In 1796 he published two pamphlets in defence of the Directory and against the counter-revolution, "De la force du gouvernement actuel et de la necessite de se Tallier" and "Des reactions politiques."
Besides a large number of animal and vegetable substances, many precipitates formed in the course of inorganic chemical reactions are non-crystalline and appear in the colloidal state, instances are the sulphides of antimony and arsenic and the hydroxides of iron and alumina.
They also differ very markedly from free living fungi in their chemical reactions.
The wall of the hyphae of the fungus give in the young state the ordinary reactions of cellulose but older material shows somewhat different reactions, similar to those of the so-called fungus-cellulose.
The classification of lichens is unique in the fact that chemical colour reactions are used by many lichenologists in the discrimination of species, and these reactions are included in the specific diagnoses.
The substances used as tests in these reactions are caustic potash and calcium hypochlorite; the former being the substance dissolved in an equal weight of water and the latter a saturated extract of bleaching powder in water.
These substances are represented by lichenologists by the signs K and CaC1 respectively, and the presence or absence of the colour reactions are represented thus, K+, CaCI+, or K -, CaC1 -.
The objection to the case of these colour reactions is due to the indefinite nature of the reaction and the doubt as to the constant presence of a definite chemical compound in a given species.
Considerations such as these should make one very wary in placing reliance on these colour reactions for the purposes of classification.
As a synthetical agent in organic chemistry, aluminium chloride has rendered possible more reactions than any other substance; here we can only mention the classic syntheses of benzene homologues.
A similar series of reactions was carried out with rosaniline, which was shown to be the corresponding derivative of tolyldiphenylmethane.
The latter fact, as well as the extraordinary fastidiousness, so to speak, of parasites in their choice of hosts or of organs for attack, point to reactions on the part of the host-plant, as well as capacities on that of the parasite, which may be partly explained in the light of what we 'now know regarding enzymes and chemotropism.
Blagden (Ber.,1900,33,p.2544), who consider that three simultaneous reactions occur, namely, the formation of labile double salts which decompose in such a fashion that the radical attached to the copper atom wanders to the aromatic nucleus; a catalytic action, in which nitrogen is eliminated and the acid radical attaches itself to the aromatic nucleus; and finally, the formation of azo compounds.
Hantzsch explains the characteristic reactions of the diazonium compounds ky the assumption that an addition compound is first formed, which breaks down with the elimination of the hydride of the acid radical, and the formation of an unstable syn-diazo compound, which, in its turn, decomposes with evolution of nitrogen (Ber., 18 97, 30, p. 2 54 8; 1898, 31, p. 2053).
The areas of intervening cortex, arriving at structural completion later than the above sense-spheres, are called by some association-spheres, to indicate the view that they contain the neural mechanisms of reactions (some have said "ideas") associated with the sense perceptions elaborated in the several sensese spheres.
Ferrier's investigations showed, motor reactions of the facial and sensori- limb muscles are regularly and easily evoked.
The distinction, therefore, between the movement of the eyeballs, elicited from the occipital (visual) cortex, and that of the hand, elicited from the cortex in the region of the central sulcus (somaesthetic), is not a difference between motor and sensory, for both are sensori-motor in the nature of their reactions; the difference is only a difference between the kind of sense and sense-organ in the two cases, the muscular apparatus in each case being an appanage of the sensual.
Symptoms attendant on the hypnotic state are closure of the eyelids by the hypnotizer without subsequent attempt to open them by the hypnotized subject; the pupils, instead of being constricted, as for near vision, dilate, and there sets in a condition superficially resembling sleep. But in natural sleep the action of all parts of the nervous system is subdued, whereas in the hypnotic the reactions of the lower, and some even of the higher, parts are exalted.
Moreover, the reactions seem to follow the sense impressions with such fatality, that, as an inference, absence of will-power to control them or suppress them is suggested.
In many instances hypnotism seems to establish quickly reactions similar to such as usually result only from long and closely attentive practice.
Two theories of a physiological nature have been proposed to account for the separation of the complex reactions of these conditions of hypnotism from volition and from memory.
Thallic salts are easily reduced to thallous by means of solution of sulphurous acid, and thus rendered amenable to the above reactions.
If we reflect on the multitude and complexity of such actions and reactions in operation from the youngest stages to the end of the life of each individual, we cannot be surprised at any correlation.
These reactions, however, do not take place if the substances are absolutely dry.
A number of secondary reactions, however, occur, owing partly to the excess of calcium carbonate and coal and partly to the impurities present, so that the solid product of the process, which is called " black-ash," has a somewhat complicated composition.
Both these reactions are carried out in tall cylindrical columns or " stills," consisting of a number of superposed cylinders, having perforated horizontal partitions, and provided with a steam-heating arrangement in the enlarged bottom portion.
The problem of a rod suspended by strings attached to two points of it is virtually identical, the tensions of the strings taking the place of the reactions of the planes.
On this assumption, the reactions on any member at its two joints must be equal and opposite.
To find the reactions at the joints we may proceed as follows.
The stresses in the bars, in the problem as thus modified, may be supposed found by the preceding methods; it remains to infer from the results thus obtained the reactions in the original form of the problem.
The directions and magnitudes of the reactions at A and C are then easily ascertained.
The principle can of course be extended to any system of particles or rigid bodies, connected together in any, way, provided we take into account the internal stresses, or reactions, between the various parts.
Its special value lies in this, that by a suitable adjustment of the hypothetical displacements we are often enabled to eliminate unknown reactions.
The remaining equations serve to determine the reactions of the rotating body on its bearings.
We will suppose that the extraneous forces consist of a known force (X, Y, Z) at the centre, and of the reactions (Fi, Ff, R) at the point of contact.
Claisen, whose views are now accepted, studied the reactions of sodium ethylate and showed that if sodium ethylate be used in place of sodium in the above reaction the same result is obtained.
Both reactions occur to some extent simultaneously.
Nicholls and James have applied, very ingeniously, well-known reactions to the refining of copper, raised to the grade of white metal.
Much as the decade from 1880 to 1890 abounded with investigations on the reactions of bacteria to heat, so the following decade was remarkable for discoveries regarding the effects of other forms of radiant energy.
And in the second place, the various serum reactions to be described below have been called into requisition.
In the first - active immunity - a reaction or series of reactions is produced in the body of the animal, usually by injections of bacteria or their products.
He devoted himself mainly to investigations in organic chemistry, and in particular to synthetical studies by the aid of "condensation" reactions.
It is to be noticed, however, that green plants have the power of building up living substance from inorganic material, and there is a certain analogy between the building up of new living material only in association with pre-existing living material, and the greater readiness with which certain inorganic reactions take place if there already be present some trace of the result of the reaction.
Reactions in which it is used in the liquid form, in vapour, in solution, and in the presence of the so-called "bromine carriers."
Some reactions, which are only possible by the aid of nascent bromine, are carried out by using solutions of sodium bromide and bromate, with the amount of sulphuric acid calculated according to the equation 5NaBr NaBr03-1-6H2S04= 6NaHSO 4 3H 2 O 6Br.
It cannot be prepared with any degree of purity by the action of concentrated sulphuric acid on bromides, since secondary reactions take place, leading to the liberation of free bromine and formation of sulphur dioxide.
Metaor iso-xylene, the most important isomer, may be prepared by nucleus-synthetic reactions, or by distilling mesitylenic acid, C 6 H 3 (CH 3) 2 CO 2 H, an oxidation product of mesitylene, C 6 H 3 (CH 3) 3, which is produced on the condensation of acetone, with lime; this reaction is very important, for it orientates meta-compounds.
Canine is a secondary base, forming a nitroso derivative with nitrous acid, a urethane with chlorcarbonic ester and a tertiary base (methyl conine) with methyl iodide; reactions which point to the presence of the = NH group in the molecule.
Here only reactions of commercial utility will be considered, and reference should be made to the article Sulphur for reactions which are more of a purely scientific interest.
The burner gas is introduced at one end, the waste gases issue from the other, the movement of the gases being impelled partly by their own chemical reactions, partly by the draught produced by a chimney (or tower), or by mechanical means.
By the play of reactions induced in this way practically the whole of the SO 2 is ultimately converted into sulphuric acid, and at the same time the nitrogen oxides are always recovered with comparatively very slight losses and made to serve over again.
The reactions taking place in the vitriol chambers are very complicated, and have been explained in many different ways.
Lunge, according to which there are two principal reactions succeeding each other, it may be in quite contiguous places, but under different conditions.
This theory at once explains, among other things, why the acid formed in the vitriol chambers always contains an excess of water (the second of the above-quoted reactions requiring the "mass action" of this excess), and why the external cooling produced by the contact of the chamber sides with the air is of great importance (liquid water in the shape of a mist of dilute sulphuric acid being necessary for the process).
Whatever be the true theory of the vitriol-chamber process, there is no doubt about the way in which the reactions have to be carried out in practice.
Since the reactions occur among gases and liquids in the nebulous state, vast spaces have to be provided in which the process may be carried out as completely as possible before the waste gases are allowed to escape into the outer air.
For similar reasons it is necessary to employ much more water than is required to form H 2 SO 4; and this is all the more necessary as strong sulphuric acid dissolves the nitrous compounds in the shape of nitroso-sulphuric acid, and thus withdraws these oxygen carriers from the gas-space of the chambers where the necessary reactions take place.
Here the reactions sketched above take place, so that "chamber-acid" as already described is formed, while a mixture of gases escapes containing all the atmospheric nitrogen, some oxygen in excess, about 0.5% of the total S02, and some oxides of nitrogen.
It forms a benzal compound, and gives an oyxmethylene derivative and cannot be oxidized to an acid, reactions which point to it being a ketone containing the grouping -CH 2 CO-.
There is very little doubt that the general course of the decompositions follows these iines; but any such simple explanation of the actions taking place is rendered impossible by the fact that, instead of the breaking-down of the hydrocarbons being completed in the coal, and only secondary reactions taking place in the retort, in practice the hydrocarbons to a great extent leave the coal as the vapours of condensible hydrocarbons, and the breaking down of these to such simple gaseous compounds as ethylene is proceeding in the retort at the same time as the breaking up of the ethylene already formed into acetylene and methane, and the polymerization of the former into higher compounds.
Hence we find that the tar is formed of two distinct sets of products, the first due to incomplete decomposition and the second to secondary reactions due to the products of the decomposition being kept too long in the zone of heat.
Intellectual developments do not go straight onward; there are sharp and sudden reactions.
Many of the movements just mentioned are, at least in design, pure reactions involving no new thoughts.
Many reactions serve to distinguish these three types of alcohols.
The salts of arsenic acid, termed arsenates, are isomorphous with the phosphates, and in general character and reactions resemble the phosphates very closely; thus both series of salts give similar precipitates with "magnesia mixture" and with ammonium molybdate solution, but they can be distinguished by their behaviour with silver nitrate solution, arsenates giving a reddish-brown precipitate,whilst phosphates give a yellow precipitate.
In some reactions it behaves as having the first formula, in others as having the second.
All these reactions take place concurrently, so that one molecule of a diglyceride may still retain its ephemeral existence, whilst another molecule is already broken up completely into free fatty acids and glycerin.
Before that time it was believed that not only could individual oils and fats be distinguished from each other by colour reactions, but it was also maintained that falsification could be detected thereby.
With one or two exceptions (detection of sesame oil and perhaps also of cotton-seed oil) all colour reactions are entirely useless.
The modern methods of oil testing rest chiefly on so-called "quantitative" reactions, a number of characteristic "values" being determined which, being based on the special nature of the fatty acids contained in each individual oil or fat, assist in identifying them and also in revealing adulteration.
Some of these are recognizable as pale yellowish and white mica; others seem to be chlorite, the remainder is perhaps kaolin, but, owing to the minute size of the flakes, they yield very indistinct reactions to polarized light.
The yield obtained is only about 40% of that required by theory, on account of secondary reactions taking place.
I'll record the facts from my personal point of view, and my observation of the reactions of the others involved, some of whom are unable to tell their own story.
We're testing the growth reactions or rate of deterioration of various organics exposed to a variety of energy and magnetic sources.
Contrary indications are that this disillusionment with the established political system could produce the threat of right wing reactions.
The new red wine is eliciting mixed reactions from wine experts.
The dissociated molecules can undergo thermal reactions with neighboring surface atoms or with other adsorbates.
Jasminum Absolute produced positive patch test reactions in some patients who were contact sensitive to cinnamic aldehyde.
Aliphatic conjugated and aromatic aldehydes failed to produce urticarial skin reactions with the exception of acrolein.
Reactions of Grignard reagents Grignard reagents and water Grignard reagents react with water to produce alkanes.
This is explored some more in the page on ligand exchange reactions Amphoteric hydroxides An amphoteric hydroxides An amphoteric substance has both acidic and basic properties.
Reactions range from minor skin rashes to major life-threatening anaphylaxis.
Less severe reactions anaphylaxis sometimes results in less severe reactions which are not life threatening.
The same reactions with acid anhydrides Ethanoic anhydride is the only one you are likely to come across for UK A level purposes.
We are interested in expanding the repertoire of biocatalytic reactions by developing novel biocatalysts for reactions that are chemically very difficult.
Conclusion The ASR retinal prosthesis, to date, has shown no biosafety or negative personal reactions in people with RP.
Workers exposed to the dust of African boxwood developed alarming reactions including irritation of the eyes and nose, and also constitutional symptoms.
Many are reactions to normal life events e.g. bereavement or marital breakdown.
Know how to distinguish alkenes (as unsaturated hydrocarbons) from alkanes (as saturated hydrocarbons) using addition reactions with aqueous bromine.
Employment of in-situ FTIR, pH and Raman probes along with reaction calorimetry help follow these complex reactions.
In response to cold, plants trigger a cascade of genetic reactions that allow them to survive.
The kinetics of chemical change, including catalysis; the mechanistic interpretation of chemical reactions.
The chemical reactions that I am most concerned with are of relevance to heterogeneous and enzymatic catalysis.
It is now generally accepted that the loss of stratospheric ozone is caused by chemical reactions initiated by chlorofluorocarbons.
Some stars simply fade like cooling cinders when they have exhausted all the thermonuclear reactions which had made them shine through their lifetime.
Numerous chemical and biological phenomena are modeled by non-linear ODE's, for example chemical reactions and voltage clamped nerve cells.
At least it is striking that the media reactions were so universally condemnatory.
This made me feel great coz I didn't know what their reactions would be!
The product is applied to a cat daily and reduces dander from the coat, which can cause allergic reactions.
In order to learn more about the mechanism of these reactions we have studies these reaction using time-resolved in-situ X-ray diffraction.
Our aim is to understand how these reactions take place and how they control the speeds of mineral dissolution and precipitation.
We have recently done pioneering experiments to demonstrate that resonant radiofrequency electromagnetic fields also affect radical reactions.
Their reactions reinforced our own impressions that there is nothing like this anywhere else in the world.
You will also consider energetics, which involves an analysis of energy exchanges taking place in chemical reactions.
We call the heat changes associated with chemical reactions enthalpy changes (D H ).
In adult studies, montelukast reduced sputum eosinophils and attenuated early and late phase allergen-induced reactions.
There were almost 1100 deaths from medication errors and adverse reactions in 2000.
Positive patch test reactions to the latex and to an aqueous extract of the leaves and latex were observed.
You also need to have the reactions of a slip fielder.
The course will introduce the theoretical formalisms used to describe the various types of nuclear reactions.
Basically, the Hydrogen nuclei fuse together in a series of reactions to form Helium nuclei and energy.
Hypersensitivity reactions, as have been reported for other contrast media containing gadolinium, have also been observed after administration of Gadovist.
Allergic skin reactions were reported in one trial with oral ginkgo 240 mg.
God-given, model reactions to what we're going through.
Within each frequency grouping, adverse reactions are ranked in order of decreasing seriousness.
We use three reactions to make blue, yellow and white paints, which can be painted onto paper or white hardboard.
The body's allergic reactions may include repeated episodes of fever, shaking chills, sweating, headaches, vomiting, and pain.
Hypersensitivity and allergic reactions As with any recombinant product, Raptiva is potentially immunogenic.
It's not easy to get across different reactions when your voice has to remain utterly impassive, yet he managed it.
An infant's actions are purely impulsive reactions to the sensations and emotions he is experiencing.
No severe reactions have been reported with subcutaneous infusion.
Ozone is a lung irritant emitted from many air cleaners in the market that can trigger allergy reactions, even in small amounts.
Reactions to lactose are due to a deficiency of the enzyme lactase, which the body needs in order to digest lactose.
Adverse reactions accompanying overdose should be treated by gastric lavage and supportive measures.
Since photosynthetic light reactions produce ATP, the ATP dependence of RuBisCO activation provides a mechanism for light-dependent activation of the enzyme.
More extensive market research was carried out to gage the reactions of consumers.
The first group more commonly cause allergic reactions and have a short length of action as they are rapidly metabolized by cholinesterase.
But it is not clear what causes the monocytes to move to the damaged site and set off these reactions.
Imagine stopping and inhibiting our usual reactions and so being present while eating mouthful by mouthful.
In the process of fusing hydrogen to form helium, the nuclear reactions also produce elementary particles called neutrinos.
Another remote risk to life is from unusually severe reactions to hyperstimulation of the ovaries by the hormones used to induce multiple ovulation.
Reactions occurred but despite many efforts only complex mixtures of hexane soluble phosphorus containing compounds could be obtained that proved impossible to identify.
The transition from anoxygenic to oxygenic photosynthesis involved an extension of the existing system, whereby new reactions were added on to existing ones.
Thrombin is formed from prothrombin by a prothrombin activator, itself the end of a series of reactions.
Anxiety reactions, even psychotic reactions, may result.
Useful Products from Air Reversible reactions In some chemical reactions, the products of the reaction can react to produce the original reactants.
Reactions may commonly be zero order, first order or second order with respect to a particular reactant.
However, similar adverse reactions have been noted in 40% of these patients.
Over 3,500 cases of severe reactions have been documented.
This section provides information about reporting suspected adverse drug reactions for healthcare professionals.
To understand what is happening here we need to think about redox reactions.
In this section of questions we examine one of the most common types of such reactions, sigmatropic rearrangements.
These enzymes catalyze many reactions such as carbon skeleton rearrangements or the removal of a methyl group from a tertiary amine.
Reactions can range from mild redness to severe painful blistering.
For some time my daughter and I have been suffering sinusitis, hay fever and allergy reactions due to the ever changing environment.
There were 8 adverse reactions in the experimental group; the safer option of using sodium bicarbonate would be an efficacious alternative.
Each genetic pathway metabolizes glucose and produces succinate via dissimilar chemical reactions.
Some contain a surfactant called sodium lauryl sulfate, which is a common cause of reactions, particularly in people with eczema.
The tip cap of the pre filled syringe contains dry natural rubber, which may cause allergic reactions.
Can result in water pollution e.g from mine tailings (obvious from water color) Reactions speeded up by warmth.
Further reactions were then carried out to produce the final product taxol.
These reactions outline the general route that Holton employed to synthesize taxol.
The characters ' motivations and reactions, tho, didn't quite ring true for me.
It takes a special effort and much unlearning of reactions to see them merely as things.
In sensitive individuals, this dye can produce allergic reactions, including urticaria, severe abdominal cramps and pain.
Some people have urticaria (skin reactions similar to nettle rash or hives ).
And why do many doctors (and perhaps most GPs) still not recognize that antidepressant withdrawal reactions even exist?
Quantum mechanical modeling techniques have been used to study many different zeolites and the roles they play in the reactions they catalyze.
There is information about cell chemistry, oxidation-reduction reactions, the copper zinc cell and further detail about oxidation states.
The aqueous solution, however, does not show the ordinary reactions of cobalt or of ammonia, and so it is to be presumed that the salt ionizes into [Co(NH 3) 6] and 3C1'.
It shows characteristic ketone reactions, yielding a bisulphite compound and combining with hydrocyanic acid to form the nitrile of a-oxyisosuccinic acid.
Lignified tissues are colored yellow by aniline sulphate or aniline chloride, violet with phloroglucin and hydrochloric acid, and characteristic reactions are also given by mixtures containing phenol, indol, skatol, thailin, sulphate, &c. (see Zimmermanns Microtechnique).
Milk of sulphur (see above), obtained by decomposing a polysulphide with an acid, contains both forms. The insoluble variety may also be obtained by decomposing sulphur chloride with water and by other reactions.
Thus we can construct a kind of envelope of theory, which, by careful testing as we proceed, can be made to indicate in a general manner the reactions of one part of the activities of the economic world upon the others, and the interdependence of the several parts.
In a series of 75 reactions it was found that in 61 there was apparently a diminution in weight, but in 1908, after a most careful repetition and making allowance for all experimental errors, Landolt concluded that no change occurred (see Element).
Wislicenus, van't Hoff and others showed that substances having the same graphic formulae vary in properties and reactions, and consequently the formulae need modification in order to exhibit these differences.
Such reactions are termed reversible (see Chemical Action).
The complete conversion of stannous into stannic chloride may be effected by a great many reagents - for instance, by chlorine (bromine, iodine) readily; by mercuric chloride in the heat, with precipitation of calomel or metallic mercury; by ferric chloride in the heat, with formation of ferrous chloride; by arsenious chloride in strongly hydrochloric solutions, with precipitation of chocolate-brown metallic arsenic. All these reactions are available as tests for "stannosum" or the respective agents.
The reactions are strictly analogous to those which occur in the smelting of galena (see Lead), the carbon reducing any oxide, either present originally in the ore or produced in the calcination, and the iron combining with the sulphur of the bismuthite.
Thus the reactions NH 4 Cinh 3 +HC1, and PC PC13+C 12 are instances of the first type; N 2 O 4 2NO 2, of the second (see Chemical Action).
These reactions are of special interest, for they culminate in the production of artificial ruby and sapphire (see Gems, Artificial).
In the beginnings of consciousness instinctive reactions precede definite thoughts, and even in mature life thoughts often follow acts instead of preceding them.
And what is the time limit for such reactions?
This page summarizes the reactions of amines as nucleophiles.
Sulfur is the best element for rearrangement reactions and allows us to employ the novel strategy of migrating functional groups.
Reflection absorption infrared spectroscopy (RAIRS) is the main technique that is used to study these reactions.
These hepatic reactions were observed during or immediately after treatment, and in most cases were reversible after discontinuation of telithromycin.
Minerals and trace elements serve as vital catalysts for the biological reactions that take place within the body.
The analysis is extended to a consideration of rate constants for chemical reactions between solutes in solution.
Abstract Radiocarbon is produced within minerals at the earth 's surface (in situ production) by a number of spallation reactions.
The assumption of charge independence is used to calculate production by cosmic ray neutrons using spallation cross sections for proton induced reactions.
The next diagram shows the redox reactions demonstrating the chemistry of succinate production.
In a tantalum target, the electrons generate an intense highly directional gamma-ray beam that can be used to carry out photonuclear reactions.
Enantiomers behave in the same way in ordinary test tube reactions.
The sun radiates energy produced by thermonuclear reactions deep in its interior.
Both the pre-mRNA processing reactions of capping and splicing were also subsequently shown to interconnect with transcription elongation.
The problem was that white blood cells were in the transfused blood causing reactions.
Acute, severe reactions may occur in 1-2% of transfused patients.
It is this aggregation of platelets which triggers the cascade of reactions leading to blood clot formation (thrombosis).
The characters ' motivations and reactions, tho, did n't quite ring true for me.
We do not at present have data that would allow us to accurately calculate the extent of underreporting of withdrawal reactions.
Some people have urticaria (skin reactions similar to nettle rash or hives).
There has also been a notable increase in reporting of immediate vasovagal reactions to the injection, including syncope.
Remarkably, she managed not to mention withdrawal reactions in over one full page of text on " Adverse effects ".
Try each food for two or three days at a time before moving on to the next to check for allergic reactions.
KidsHealth.org stresses the importance of watching closely for allergic reactions as well as keeping your child on a safe and strict feeding schedule.
Why should her reactions be any different when she plays an interactive game with you on the computer?
You'll never find a name that pleases everyone, and some people may hurt your feelings by having negative reactions to names that you love.
If you've had allergic reactions to any of the ingredients in the past, or if you're skin has broken out from the application of any of the ingredients, do not buy the blush.
Some people experience allergic reactions to white gold.
Jewelers are now shifting to palladium as the other metal used in white gold since it does not create allergic reactions.
This can be prevented by choosing a pan or pot that has been treated to prevent the reactions.
Soy - This item is another inexpensive filler that provides little protein, interferes with normal digestion, and has been known to cause allergic reactions in pets.
The shots your vet prescribed are necessary to help your cat's hormonal system remain in balance and able to fight off immune reactions that produce the typical allergy symptoms.
Testing needs to be done on the cats showing the reactions.
The humidity seems to add to the congestion asthma sufferers experience, and all of that fabulous flora may actually trigger allergic reactions as well.
Lifestyle Pets claims a 95 percent success rate of providing their clients with cats that don't trigger allergic reactions.
Each vaccination triggers an immune response alongside the possibility of negative reactions.
As these glaciers melt, there is a resulting drop in pressure that may trigger serious geological reactions.
Allergic reactions to valerian are rare, but they do happen so always watch for unusual symptoms.
While this herb has been consumed for thousands of years it can have side effects when taken in medicinal quantities, as well as having reactions with various medications.
Some cases of allergic reactions have occurred, so if a rash or redness appears, discontinue use.
In addition, some individuals experience upset stomach, heartburn, nausea and allergic reactions.
When taking these products or any herbal remedy, pay careful attention to the ingredient list, and watch for adverse reactions.
Many Chinese herbs can cause reactions and can be dangerous if not used properly.
It is used in Traditional Chinese Medicine to prevent allergic reactions.
Upset stomach and nausea have been reported side effects in some patients and rare but serious allergic reactions have also been reported.
Whether it's tree pollen, grass, pet dander or another source, allergens often trigger uncomfortable reactions in adults and children alike.
If your child develops these symptoms, call 911 or take him to the nearest emergency room, since such reactions may be life-threatening.
If this is the case, test an unnoticeable area to make sure that there are no chemical reactions before cleaning the entire ceiling.
Artificial fragrances and preservatives can also cause allergic reactions for some people.
Individuals with adverse skin reactions toward makeup and cleansers should always consider a sample size before going big.
Volatile chemical reactions occur both at the creation of the liquid and as soon as it leaves the bottle.
Of course, with mascara the results are pretty instantaneous, and allergic reactions are rare so there wasn't much to worry about from that standpoint.
An allergy test should always be done before a full application of liquid latex by conducting a patch test to a small area of the skin to check for reactions.
Stainless steel is the poorest conductor of heat among metal pans, but it is most widely used because it does not cause any chemical reactions to food and is virtually maintenance free.
Make notes of their reactions in a journal to use in your layout.
Your friends and family are affected and you may have started to feel guilty for your reactions.
Many people find that exercising helps them to manage their reactions to anger.
These physical reactions cause damage to the body over time as anger continues to be in control.
By following these steps, you should have been able to identify what angers you, common themes of your anger, and physiological reactions to stress that lead to rage.
Temporary stress reactions are healthy, but when the body remains in a continuously alert or stressed state, major health consequences result.
Ask members to come up with ways to control their reactions to the situation.
Life stressors trigger stress reactions in the body, which impair the immune system and decrease overall health.
If you believe you may suffer from anxiety attacks, see your doctor for a consultation about possible causes and how to effectively treat them to eliminate your reactions.
Many of these physical reactions to extreme stress can be harmful to the body if they occur frequently, and they can also be indicators of more severe medical conditions.
Logic is simply unavailable in the moment, and reactions are based on raw emotion.
People with chronic anxiety realize that these mental symptoms are out of proportion with the situation but are unable to control their reactions.
These physical symptoms are normal physiologic responses to a stressful situation; these reactions are intended to be short-term and protect the body from danger or threats.
A person with anxiety may also develop long-term physical complications as a result of the constant stress reactions.
You have many options for anger management classes that can help you learn what angers you, what to do when you are in an anger-provoking situation, and why changing your reactions to stressful events can greatly improve your life.
There are physiological reactions to stress that cause you to feel anger to the point of outbursts.
If you are unable to identify the reactions to stress you experience, or you're unable to use anger management techniques before you have an outburst, you may need further assistance controlling your emotions.
Taking time out with your teen to discuss the situation at home is a good way to show him that someone does care about his reactions.
This emotional reaction can then set off a series of physical reactions, which are also referred to as the "fight or flight" reaction.
More advanced levels of physics work with the smallest of sub atomic particles and their reactions to one another.
They cause negative reactions in both the victim and the instigator, often escalating to more extreme behavior.
This essential mineral is vital to oxygen transportation in the body, as well as several metabolic reactions.
Different reactions require different enzymes.
Many people report digestive reactions to nuts and seeds, though in some cases soaking the seeds for hours beforehand may aid the digestion.
In its raw form, it's unlikely to cause allergic reactions.
The next step for researchers is to ask more people to "walk" through the virtual meth apartment and record their reactions to the environment in detail.
Again, because of the potential seriousness of the reactions, see your doctor before making any treatment plans.
Injection carries a risk of serious allergic reactions.
If you experience any of these symptoms upon quitting, know that they are common reactions.
Side effects and adverse reactions occur with most medications.
The best drugs only have fewer or less-serious side effects and reactions.
There are also some less common side effects and adverse reactions - to see a full list visit RX List.
Inappropriate emotions and impulsive reactions to situations can be another tip off that something is not quite right.
For instance, the person who is lying will have delayed or forced reactions.
Choose a fabric, such as 100 percent cotton or a cotton blend that is unlikely to cause allergic reactions to sensitive skin.
As a result, dust and dander are often prominent in down comforters and are the true culprits of allegoric reactions.
Synthetic comforters like these are ideal for individuals who are susceptible to allergic reactions, who disagree with the usage of down or who can't afford a down comforter.
West is also famous for his emotional reactions at awards shows, with several outbursts under his belt.
When the Review's new party school list is released each year, reactions from students, parents, administrators, and educators vary.
Additionally, corn products can produce allergic reactions in some dogs.
I have a question about allergic reactions to dogs as this issue has caused a rift in my family.
Corn, soy and wheat, which often produce allergic reactions in dogs, are avoided.
A dying dog will stop actively seeking it however, and his reactions should be respected.
One of the reasons professionals are usually called in to perform spray foam insulation is because the product does contain diisocyanates, which can cause reactions if inhaled or touches the skin.
Some people have chemical reactions to 10KT jewelry that leaves a green residue on the skin.
Although most used jewelry professionals and pawnshop owners are honest, selling pieces in person gives you a chance to gauge the buyer's reactions and avoid shady deals.
Wearing it around Easter is sure to get amused reactions.
These covers can also block mold, bacteria and other microbes that cause allergic reactions and might be living in your mattress.
Many users report improved health, but likewise there are complaints of upset stomachs, yeast infections, allergic reactions and headaches brought on by using it.
Made without harsh chemicals and suitable for vegans, these soaps are great for people with sensitive skin or who have allergic reactions to conventional cleansing products.
Shaving creams that are not organic have a variety of synthetic ingredients, many of which irritate the skin and can cause serious allergic reactions.
Since allergic reactions can happen, patch testing is always suggested.
Although a small percentage of people have allergies to lanolin, wool causes very few allergic reactions.
This means a more wholesome product for your family and less likelihood of allergic reactions or inadvertent exposure to substances that may prove hazardous at some future time.
Did anyone have allergic reactions or find that the hair oil actually created a negative effect on their hair or skin?
They are also absorbed by the skin and can cause allergic reactions and breathing problems.
They may also be a risk of allergic reactions due to other substances used in the manufacturing process.
Some ingredients may also cause allergic reactions.
These products tend to be hypoallergenic, so the possibility of allergic reactions is minimal.
Pyrethrin-based products may also cause allergic reactions in humans.
However, though reactions slow and the body weakens with age, memory loss is not an ordinary symptom of aging.
The body's reactions to sleep apnea can be seen in multiple ways.
Sleepwalking can be caused by reactions to medications or alcohol, or some forms of mental illness.
The reported rate of complications and adverse reactions is less than one percent, considerably lower than the rate for most other apnea treatments.
In addition, brain chemistry resulting in abnormal levels of principal neurotransmitters in the brain can cause unusual reactions to situations.
These metals are one hundred percent nickel free in order to prevent the occurrence of allergic reactions.
Felt heavy when you had to stop and change directions, but that could just be due to poor reactions on my part.
From the "twang" sound it makes when you strike a wrong chord, to the different crowd reactions, it all combines nicely to make Guitar Hero really an experience not to be missed.
By creating trio near the bottom of the screen, you can make many (oftentimes unexpected) chain reactions.
That said, these Jewel Quest chain reactions can cause some frustration, especially if you're working on a particular tile only to have an unexpected disappearance take away that all important gleaming skull, for example.
There's another reason why random chain reactions aren't very good.
Chain reactions are wonderful, glorious things, and exploiting them in Super Bounce Out may be one of the best strategies out there.
Sometimes, creating chain reactions can remove many marbles in a single move.
The most effective means of treating food allergies is to avoid the foods that produce allergic reactions.
A casual approach involves eliminating, one at a time, foods from the diet suspected of causing allergic reactions and observing the person to see if there is a reduction in symptoms in the absence of particular foods.
Another way to identify food allergies is to keep a food diary, recording everything eaten for a period of three or four weeks and noting any allergic reactions during that period.
Electrolytes control the fluid balance of the body and are important in muscle contraction, energy generation, and almost all major biochemical reactions in the body.
The physician will also exclude other potential causes for the symptoms and rash, including rubella, infectious mononucleosis, bacterial infections such as Lyme disease, allergic reactions, and lupus.
When recurring symptoms in children indicate sensitivity to certain substances in the environment, allergy testing can be used to identify the particular allergens that my be triggering reactions.
Identification of the allergen may help parents avoid exposing their child to the substance and thereby reduce allergic reactions.
Allergic reactions may be dose dependent; that is, longer exposure or exposure to larger amounts of the offending allergen may cause a greater response of the immune system and result in a stronger reaction.
Allergic reactions can also be triggered by insect bites, molds and fungi, certain prescription drugs, plants such as poison ivy and poison oak, and irritating or toxic substances released into the air.
Allergic reactions involve a special set of cells in the immune system known as mast cells.
In radio-allergosorbent allergy testing (RAST), blood serum is combined with a specific concentration of potential allergens in a test tube, and the mixture is tested for antibody/antigen reactions.
In some instances, a tracing of the set of reactions may be made by placing paper over the tested area.
In other words, airborne and food allergens that are inhaled or ingested are capable of causing skin reactions when contact is made with mast cells.
Suspect foods are then added to the diet one at a time and the individual is observed for reactions.
Skin tests should never include a substance to which the individual has had severe allergic reactions or that has previously caused anaphylaxis.
Severe initial reactions may justify close professional observation for at least 12 hours after testing.
Children should be observed closely for signs of allergic reactions after allergy testing using skin tests, inhalation tests, or provocation tests.
Intradermal testing may inadvertently result in the injection of the allergen into the circulation, with an increased risk of adverse reactions.
Physicians and medical personnel can assure parents that careful observation is involved in testing procedures and that allergens to which the child may have had severe reactions will be avoided.
It is important for parents to tell the child how the tests will be done so that the child is not anxious or apprehensive, which in some cases may increase the likelihood of false positive reactions.
The doctor will begin by ruling out such other possible diagnoses as bacterial or viral infections, collagen vascular disease, hypersensitivity reactions, and malignant tumors.
Byproducts of the numerous reactions can begin to accumulate in the cells and interfere with other chemical reactions and over time damage the mitochondria further.
The child's doctor can advise the parents on how to manage the child's blood glucose levels to avoid hypoglycemic reactions as much as possible.
Metabolism-The sum of all chemical reactions that occur in the body resulting in growth, transformation of foodstuffs into energy, waste elimination, and other bodily functions.
Other conditions can induce a fever, including allergic reactions, ingestion of toxins, teething, autoimmune disease, trauma, cancer, excessive sun exposure, or certain drugs.
Allergic reactions do occur in some people, but they are rare.
Adjustment disorders are also differentiated from other reactions to stress such as PTSD by both symptoms and the relative severity of the causative event.
Physical reactions, such as fast pulse, sweating, trembling, fatigue, and weakness, may accompany anxiety.
By passing judgment on the child's reactions, adults undermine the child's feelings and make the loss even more difficult for the child to handle.
Although there have been warnings about severe, even fatal reactions to DTP vaccine, these reactions were seen in about one in 140,000 cases with whole cell DTP.
These reactions, which also occur in response to other vaccines, are potentially fatal.
Drug reactions are another common allergic cause of rash; in this case, a rash is only one of a variety of possible symptoms, including fever, seizures, nausea and vomiting, diarrhea, heartbeat irregularities, and breathing problems.
Children with Tourette syndrome often have problems socializing because of embarrassment over uncontrollable tics and negative reactions from parents, teachers, and peers who do not understand the disorder.
Foods that most often produce allergic reactions in infants are cow's milk, soy products, and citrus fruits.
These reactions can be food sensitivities or intolerances.
Sulfites, another additive, have been found to cause asthmatic reactions and even anaphylactoid reactions.
IgE-mediated allergic reactions can progress to other allergic symptoms.
Although the time between ingestion and symptoms is somewhat variable for allergic reactions (IgE-mediated), the vast majority occur within minutes.
Reactions due to intolerances, like lactose, may occur somewhat later.
This test is not used on a child with severe anaphylactic reactions or on children with widespread eczema, a skin disorder.
The only treatment for IgE-mediated reactions to foods is avoidance.
These reactions, as well as intolerances, are not responsive to desensitization.
An epi-pen should be kept in the home for all IgE mediated food allergies and all inadvertent reactions should be treated.
Early introduction of highly allergenic foods may predispose a child to reactions, but this is controversial.
Children who have severe reactions to a trigger food should wear a medical alert bracelet.
Higher temperatures also inhibit the growth of some bacteria, while at the same time speeding up the chemical reactions that help the body's cells repair themselves.
In other circumstances, the immune system may overreact (allergic reactions) or become damaged (autoimmune diseases), causing the uncontrolled release of pyrogens.
Medical personnel provide close observation during the test to help prevent or react to these unlikely reactions.
The inflammation may be caused by conditions in the mouth itself, such as poor hygiene, from burns from hot food or drinks, or by conditions that affect the entire body, such as medications, allergic reactions, or infections.
Allergic reactions have been rarely reported, and very rare cases of convulsions have occurred.
The digestion, storage, and use of fats (lipids) from foods are complex processes that involve hundreds of chemical reactions in the body.
Allergy shots can help relieve the allergic reactions that trigger asthma episodes and decrease the need for asthma medications.
They should also report immediately to their healthcare provider any adverse reactions to the treatment.
Immediate severe reactions to penicillin are almost unknown in children but can occur in adults.
Parents should be educated on the signs of relapse and of adverse reactions to the medication, and encourage children in remission to self-report any possible signs of relapse.
In some cases, reactions to medications can also cause prolonged fever.
Some people have found Benzhexol beneficial, but others have suffered reactions to it.
The drug works by preventing certain cells in the body from releasing substances that cause allergic reactions or asthma symptoms.
Syncope may also arise from emotional distress, pain, and other reactions to outside stressors.
An individual may be asked to avoid caffeine, nicotine, alcohol, and those substances that cause allergic reactions.
People for whom some foods cause allergic reactions or sensitivities or dizziness, should avoid consuming the offending substances.
When a person first begins taking a substance, he or she will note various mental or physical reactions brought on by the drug (some of which are the very changes in consciousness that the individual is seeking through substance use).
The patient may experience weakness, fainting, sweating, or other reactions while fasting or during the test.
Perinatal morbidity is associated with infections, reactions to anesthesia agents, blood clots, and bleeding.
Under normal developmental conditions, these neonatal reflexes represent important reactions of the nervous system and are only observable within a specific period of time over the first few months of life.
Then children are required to remain in a supervised recovery area for an hour or more following the procedure to monitor for reactions to anesthesia.
The contrast material used in MRI contains a material called gadolinium, that is much less likely to cause severe anaphylactic (allergic) reactions than the iodinated material used for CT scans.
For younger infants and children that require sedation or anesthesia to complete the examination, reactions to the anesthesia are possible, including headaches and vomiting.
Nasal injuries from piercing include bacterial infections of the skin and nasal cartilage, allergic reactions to the jewelry, tissue damage, and periodic bleeding.
Infections or allergic reactions caused by foreign objects in the nose or piercing usually clear up promptly once the object or piece of jewelry is removed.
Antihistamines are drugs used to treat the symptoms of allergies and allergic rhinitis by blocking the action of histamine, a chemical released by the immune system in allergic reactions.
Antihistamines are used to treat the sneezing, runny nose, and itchy eyes of allergies and allergic rhinitis, as well as allergic skin reactions and anaphylactic reactions to insect stings and certain foods.
Hematologic reactions are rare but may be severe.
A large number of additional reactions have been reported.
Not all apply to every drug, and some reactions may not be drug related.
Some hypersensitive people have unique chemical reactions in the brain that cause them to respond much more strongly to stress.
Almost all of those deaths are the result of allergic reactions to the sting and not of exposure to the venom itself.
Children who are suspected of being allergic should consult an allergist about shots that can reduce reactions to bee and wasp venom (venom immunotherapy).
Children who are sensitive to certain stings and bites are at risk for serious anaphylactic reactions.
Serious reactions, including high fever, difficulty breathing, and fast heartbeat should receive immediate medical treatment.
Conjunctivitis is an extremely common eye disease because the conjunctiva is continually exposed to microorganisms and environmental agents that can cause infections or allergic reactions.
Conjunctivitis may also be caused by environmental hazards, such as wind, smoke, dust, and allergic reactions caused by pollen, dust, or grass.
The normal function of the amygdala is to receive and process signals of potential danger and set off a series of reactions that will help individuals protect themselves, such as the fight-or-flight response.
Rarely, vaccines may cause severe allergic reactions, swelling of the brain, or seizures.
About 12,000 vaccine-related adverse reactions are reported annually; however, it is estimated that less than 10 percent of doctors file such reports.
Vaccine Adverse Event Reporting System (VAERS)-A federal government program for reporting adverse reactions to the administration of a vaccine.
In addition to the emotions that normally accompany grief, such as denial, anger, and guilt, SIDS parents may experience certain other reactions unique to their situation.
Because of the risk of toxic reactions to minerals and some vitamins, children should be discouraged from taking vitamin supplements unless there is clear evidence of increased need.
Approximately 50 different biochemical reactions occur entirely or partially within a peroxisome.
However, infection, poor healing, loss of feeling or motion, blood clots, and adverse reactions to anesthesia are all possible complications of surgery.
Infants' reactions to divorce come from interference with the satisfaction of their basic needs.
Reactions include irritability, increased crying, fearfulness, separation anxiety, and sleep problems.
Typical reactions at this stage include sadness, depression, anger, and general anxiety.
This is especially true if any of the common reactions last for an unusual amount of time, intensify over time, or if the child talks about or threatens suicide.
The risk of transfusion (such as transfusion reactions, potential toxins, and infections such as HIV or hepatitis) are carefully weighed against the severity of the anemia in the infant.
Some children may have allergic reactions to the contrast material, although severe reactions are rare.
In these cases, children are required to remain in a supervised recovery area for an hour or more following the procedure to be monitored for reactions to anesthesia.
Some children may have reactions to anesthesia or sedation, including headaches, shivering, or vomiting.
Rarely, severe anaphylactic reactions can occur that require emergency treatment.
Individuals can develop reactions to certain proteins in the blood, called a transfusion reaction.
Any unusual conditions or reactions should be reported to the pediatrician.
Anaphylactoid (meaning "anaphylactic-like") reactions are similar to those of true anaphylaxis but do not require an IgE immune reaction.
Late phase reactions occur in about 10 percent of cases.
Because of the severity of these reactions, treatment must begin immediately.
A child with known severe allergic reactions should be carrying an allergy kit with epinephrine; if not, treatment will have to be delayed until emergency personnel can provide the required medication.
For reactions to insect stings or allergy shots, a tourniquet should be placed between the puncture site and the heart; the tourniquet should be released every 10 minutes.
In addition, children with a history of allergic reactions should carry an emergency kit containing injectable epinephrine and chewable antihistamine and be instructed in its use.
These shots provide 90 percent protection against the first four insect reactions, but less protection against fire ant reactions.
Premedication is also helpful in preventing anaphylaxis from x-ray dyes; also there may be alternative dyes available for use that are less likely to cause reactions.
The risk of anaphylaxis sometimes diminishes over time if there are no repeated exposures or reactions.
Immunoglobulin E (IgE)-A type of protein in blood plasma that acts as an antibody to activate allergic reactions.
Adverse reactions to general anesthesia may also occur.
Too high a blood level of these drugs is likely to cause toxic reactions, while a level that is too low may lead to seizures.
Topical steroids can often treat reactions to henna tattoos, but improvement may take several weeks.
Children who have immunodeficiency syndromes may be subject to infection, diseases, disorders, or allergic reactions to a greater extent than individuals with fully functioning immune systems.
Each class of antibody binds to corresponding molecules (antigens) on the cell surfaces of certain foreign organisms or substances, attempting to protect the body against reactions or illness.
Immunoglobulin E (IgE) is found in respiratory secretions and is directed toward invasion of the body by parasites and in allergic reactions such as hay fever, atopic dermatitis, and allergic asthma.
Children under the age of 13 years rarely have reactions to the flu vaccine.
Moderate or severe reactions to VSV have been reported very rarely.
Other reactions, such as a low blood count or brain involvement, including encephalitis, occur so rarely that they may not be associated with VZV.
Following the distribution of the first 10 million doses of VZV, it was determined that severe reactions occurred with a frequency of approximately one in 50,000.
The National Vaccine Injury Compensation Program helps pay for medical expenses resulting from vaccine reactions.
Adverse reactions to medication may be allergic reactions involving a child's immune system, individual sensitivities to a drug, or side effects of the drug itself.
Drug allergies account for 5-10 percent of all adverse reactions to medications.
Although most allergic drug reactions have mild symptoms, on rare occasions they can be life-threatening.
Unlike other types of adverse drug reactions, the frequency and severity of allergic reactions to drugs usually are independent of the amount of drug that is administered.
Many classes of drugs can induce allergic reactions, resulting in a wide variety of symptoms affecting various tissues and organs.
Larger drug molecules are more likely to cause allergic reactions than smaller drug molecules.
Sometimes the same drug, such as penicillin, can induce different types of allergic reactions.
These complexes can be deposited in blood vessels and on membranes, causing inflammatory reactions that may be either localized or throughout the body.
T-cell-mediated allergic drug reactions require immune system cells called T-memory cells that are specific for the drug allergen.
Drug sensitivities (also called idiosyncratic reactions or unusual adverse reactions) do not involve the child's immune system or the release of histamine.
Allergic reactions to drugs are the most common cause of an inflammation of the kidneys called tubulointerstitial nephritis.
Some drugs, including penicillins and sulfonamides, can cause delayed dermatologic allergic reactions.
These are various types of skin reactions, including eczema, that do not occur immediately upon exposure to the drug.
Drug allergies can result in hypersensitivity reactions, which in turn can result in liver disorders.
Pulmonary hypersensitivity allergic reactions that affect the lungs and result in rashes and fever may be caused by nitrofurantoin and sulfasalazine.
Anaphylactoid drug reactions are similar to anaphylactic reactions.