Solvents sentence example

solvents
  • That nothing analogous to bitumen exists in coals is proved by the fact that the ordinary solvents for bituminous substances, such as bisulphide of carbon and benzol, have no effect upon them, as would be the case if they contained bitumen soluble in these re-agents.

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  • They behave similarly to solvents; and in their liquid condition leave a grease spot on paper.

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  • Though his writings abound in universal solvents and other devices of the alchemists, he made some real contributions to chemical knowledge.

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  • The process of extraction with volatile solvents is similar to that used in the extraction of oils and fats, but as only the most highly purified solvents can be used, this process has not yet gained commercial importance.

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  • Melanins obtained from tumours form black, shiny masses; they are insoluble in water, neutral salt solutions, dilute acids and in the common organic solvents.

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  • The best solvents for rubber are carbon bisulphide, benzol and mineral naphtha, carbon tetrachloride and chloroform.

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  • The nitrates are also very insoluble substances, all the so-called solvents merely converting them into jelly.

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  • The employment of guncotton as a propellant was possible only after the discovery that it could be gelatinized or made into a colloid by the action of so called solvents, e.g.

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  • They pass through a viscous stage in cooling from a state of fluidity; they develop effects of colour when the glass mixtures are fused with certain metallic oxides; they are, when cold, bad conductors both of electricity and heat, they are easily fractured by a blow or shock and show a conchoidal fracture; they are but slightly affected by ordinary solvents, but are readily attacked by hydrofluoric acid.

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  • The theory most widely accepted at present is that glass is a quickly solidified solution, in which silica, silicates, borates, phosphates and aluminates may be either solvents or solutes, and metallic oxides and metals may be held either in solution or in suspension.

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  • In the same way glass can be rendered more or less fusible, and its stability can be increased both in relation to extremes of temperature and to the chemical action of solvents.

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  • The primary amines are colourless liquids or crystalline solids, which are insoluble in water, but readily soluble in the common organic solvents.

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  • We can sometimes obtain definite compounds in a pure state by the action of appropriate solvents which dissolve the rest of the alloy and do not attack the crystals of the compound.

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  • Equally good comparisons have been obtained for solutions in other solvents such as acetic acid 3.88, formic acid 2.84, benzene 5.30, and nitrobenzene 6.95.

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  • Certain solvents, such as water, liquid ammonia or liquid hydrocyanic acid, possess the power of making some solutes, such as mineral salts and acids, when dissolved in them, conductors of electricity.

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  • It is almost insoluble in water, but dissolves readily in the common organic solvents.

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  • If it be desired to obtain larger quantities than are yielded by the above-described methods, processes having for their object the extraction of the seeds by volatile solvents must be resorted to.

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  • The experiments of Raoult on solutions of organic bodies in water and on solutions of many substances in some dozen organic solvents have confirmed this result, and therefore the theoretical value of the osmotic pressure from which it was deduced.

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  • Attempts have been made to co-ordinate this ionizing power of solvents with their dielectric constants, or with their chemical properties.

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  • Solutions of colloids in solvents such as water and alcohol seem to be divisible into two classes.

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  • Strychnine crystallizes from alcohol in colourless prisms, which are practically insoluble in water, and with difficulty soluble in the common organic solvents.

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  • Litharge and red lead are used in silver and gold assays, acting as solvents for silica and any metallic oxides present.

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  • It is readily soluble in hot water and the ordinary organic solvents, but is only slightly soluble in cold water.

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  • Another remarkable fact is that these substances yield coloured solutions in organic solvents; triphenylmethyl gives a yellow solution, whilst ditolylphenyl and tritolylmethyls give orange solutions which on warming turn to a violet and to a magenta, the changes being reversed on cooling.

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  • Raoult (Comptes Rendus, 1886-87) employed other solvents besides water, and showed that the relative lowering for different solvents and different dissolved substances was the same in many cases for solutions in which the ratio of the number of gramme-molecules n of the dissolved substance to the number of molecules N of the solvent was the same, or that it varied generally in proportion to the ratio n/N.

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  • Of these solvents, only the first three are of economic importance.

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  • In leaching, the silver ore is subjected to the action of solvents, which dissolve the silver; from the solution the silver is precipitated and converted into a marketable product.

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  • The leading solvents are aqueous solutions of thiosulphates, unsystematically but generally termed hyposulphites.

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  • Of the other proposed volatile solvents ordinary ether has found no practical application, as it is far too volatile and hence far too dangerous.

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  • At the present time the choice lies practically only between the two solvents, carbon bisulphide and naphtha (petroleum ether).

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  • Yet even with naphtha traces of the solvents remain, so that the meal obtained cannot be used for cattle feeding, notwithstanding the many statements by interested parties to the contrary.

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  • The fruits are expressed, and after the edible qualities and best class of oils for technical purposes have been taken off by expression, the remaining pulp is extracted by means of solvents.

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  • The saturated fatty acids can then be further examined, and valuable information is gained by the determination of the melting-points and by treatment with solvents.

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  • It is one of the most useful solvents for extracting alkaloids, the active ingredients in many plant medicines.

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  • New types of Viton® are versatile, offering improved capabilities in steam, solvents, highly caustic environments and low temperatures.

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  • June 1995 to March 1999 July 1999 Leatherhead Food Research Association Analysis of chlorinated paraffins and chlorinated paraffins and chlorinated solvents in foods.

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  • Furthermore, because virtually all materials change a solvents refractive index, the interferometer can detect samples containing no natural chromophores.

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  • Populate the Residual Solvents database to ensure that all required data is captured.

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  • Proteins which interact with lipid components can be eluted by non-ionic detergents or organic solvents.

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  • These findings suggest a role for hair dyes, solvents or other chemicals used in salons.

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  • Also, many problems with Chlorine containing solvents have been found (specifically the ozone layer) which makes this process somewhat less favorable.

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  • Use of volumetric glassware for solvents other than water should not rely on the water calibration.

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  • Beeck's Silicate Masonry Paint is an exterior purely inorganic paint, free of artificial resins, solvents and biocides.

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  • This is usually cellulose nitrate dissolved in organic solvents.

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  • As in paint, solvents ensure optimum drying essential for today's high speed presses.

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  • It provides general information, scientific information and details of associated issues for chlorine, chlorinated solvents and chlorinated paraffins.

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  • Solvents Many polymers contain solvent additives to vary the viscosity and prevent premature curing.

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  • KÃhrs oil finish is a mixture of oil and wax which consists almost exclusively of renewable raw materials and contains no solvents.

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  • A number are used as solvents in glues, paints, nail varnish removers, dry cleaning fluids and de-greasing compounds.

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  • Aerogel is made by high temperature and pressure critical point drying of a gel composed of colloidal silica structural units filled with solvents.

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  • We are also currently looking to develop a national research site for chlorinated solvents in a chalk aquifer.

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  • Typical contaminants are exhaust fumes from lorries parked outside the air compressor intake, flux fumes, halogenated solvents and oil from unsuitable compressors.

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  • There is also a strong possibility that sniffing solvents over a longer period of time could make someone's epilepsy worse.

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  • Highly flammable solvents near the equipment must be minimized.

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  • Replacing some non-polar solvents with polar ones may also be beneficial.

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  • They are quite soluble in the usual organic solvents of low polarity.

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  • The process involves the use of volatile solvents which are added to the oil stock to dissolve the wax.

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  • This means that polar molecules dissolve well in polar solvents - and what better polar solvent than water!

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  • Ordinary paints use aromatic solvents of the white spirit type, derived from processing of crude oil.

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  • Regulation 258/97 does not apply to food additives, flavorings or extraction solvents since these are already covered by existing legislation.

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  • All operating staff must have been trained in the operation of each dry cleaning machine and the control and use of dry cleaning solvents.

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  • Petroleum solvents are used to soften the wax into a spreadable paste, by preventing the individual molecules from bonding together.

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  • The relative lowering of the vapour-pressure can be easily measured by Dalton's method of the barometer tube for solvents such as ether, which have a sufficient vapour-pressure at ordinary temperatures.

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  • Chlorinated solvents may be amenable to biodegradation through the process of reductive dechlorination in natural aquifer systems.

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  • Non slip and easy to clean with a greater resistance to damage by water, oil, solvents and acids.

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  • There is also a strong possibility that sniffing solvents over a longer period of time could make someone 's epilepsy worse.

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  • This means that polar molecules dissolve well in polar solvents - and what better polar solvent than water !

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  • The incidence of turpentine contact dermatitis has declined in countries where legislation has resulted in the substitution of other solvents.

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  • There are typically instructions for using all of the solvents and tools in your project as well as directions for creating the shelves themselves.

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  • Don't forget to protect your ears when the noise level rises, and be sure to provide plenty of ventilation when solvents are involved.

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  • Many household products contain solvents and finding suitable ways for these to be recycled, solvent free alternatives and reducing the use of environmentally harmful products are part of green living.

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  • Products containing solvents present a challenge for the green living consumer.

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  • There are many different types of solvents.

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  • Solvents are found in many different forms around the house.

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  • These range from household solvents such as paints, paint thinners and some cleaning fluids, to solvents used for personal care, including nail polish removers and perfumes.

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  • Most solvents carry a health and safety risk along with other environmental issues.

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  • Solvents are generally heavier than air, meaning that if they leak or are not disposed of safely they can gather in a single spot and not disperse.

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  • In addition to this, many solvents are highly flammable, meaning that that they run the risk of catching fire.

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  • The combination of the highly flammable nature of solvents and the fact that many are packaged as aerosols means that they are of a highly volatile nature and should be treated carefully.

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  • It is possible to recycle solvents and specialist units can be purchased that will recycle solvents, either disposing of them or turning them back into a near perfect state allowing them to be reused.

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  • Many local authorities will have a policy for the recycling or disposal of solvents.

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  • The best way to reduce the environmental impact of solvents in a domestic situation is to reduce the use of products containing solvents.

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  • There are an increasing amount of solvent free products available, or products containing 'green' solvents.

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  • Many chemicals used in products containing solvents linger around the house and can stimulate allergies and asthma.

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  • Use water based paints instead of paints with solvents.

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  • Water based gloss paint is an excellent alternative to conventional gloss paints that contain solvents.

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  • Use vegetable oils and waxes as a replacement for lubricants containing solvents.

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  • There are many 'green' alternatives to cleaners and other household products that contain toxic chemicals and solvents and many of these are easy to make at home.

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  • It is possible to buy recycled solvents for use, however this is generally on a commercial scale and not really suited to domestic use.

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  • Finding good alternatives to solvents is one of the key challenges for the green living consumer.

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  • If you are unable to find good alternative products or facilities for recycling solvents, raise this concern with the relevant people.

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  • Hydrocarbons from petroleum fuels, ammonia, chemical solvents, herbicides and insecticides can change water chemistry as well as poison plants and animals.

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  • Notes are developed from a variety of essential oils, natural and synthetic compounds, resins, and solvents.

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  • Such frames will not only maintain their properties at humid, low, or high temperatures, but they also exhibit a powerful resistance to chemicals like alcohol, solvents, cosmetics and skin secretions.

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  • Unbreakable, lightweight and long lasting, the Polar HD lens is also resistant to solvents.

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  • Her exposure to industrial chemicals, solvents, and ionizing radiation (x ray) also increases the risk of having children with congenital heart defects.

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  • These may include tobacco smoke; household cleaners (ammonia and chlorine bleach) and furniture polish; ozone and other air pollutants; cocaine; and glue, paint thinners, solvents, and similar household products that produce toxic vapors.

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  • It can be caused by soaps, detergents, solvents, adhesives, fiberglass, and other substances that are able to directly injure the skin by breaking or removing the protective layers of the upper epidermis.

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  • Different metals require different types of cleaning solvents, and what works well with one metal may not be appropriate for another.

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  • Stronger cleaning solvents were used on the cement floor, but the outline always returns.

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  • There are some cleaners that have harsh solvents.

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  • Harsh solvents or dressings designed to keep the tire looking new may actually make it age a little faster.

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  • Thinners and solvents must be used when diluting oil paints or cleaning brushes and other painting supplies.

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  • Melt and pour soap is a product that is about half soap and half solvents.

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  • However, it may also indicate overexposure to chemical solvents and water, which leads to a loss of moisture.

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  • Instead of toxic solvents, many natural polishes contain water as a main ingredient.

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  • Various solvents, such as benzene, alcohol and chloroform, will dissolve out the pigment, leaving the plastid colorless.

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  • There is no feasible method at present known of preventing the inclusion of the resin of the latex with the rubber during coagulation, and although the separation of the resin from the solid caoutchouc by means of solvents is possible, it is not practicable or profitable commercially.

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  • It is readily soluble in hydrocarbon solvents, in chloroform and in alcohol.

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  • Some solvents are both harmful to the environment when used and also when disposed of.

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