Nucleus Sentence Examples

Starch exists, in the majority of cases, in the form of grains, which are composed of stratified layers arranged around a nucleus or hilum.

He discovered the nucleus of the cell.

The eggcell or oosphere is a large cell containing a single large nucleus, and in the green plants the rudiments of plastids.

They are more easily seen, when the nucleus is about to undergo mitosis, at the ends of the spindle, where they form the centres towards which the radiating fibres in.

In the spermatozoids of Chara, Vascular Cryptogams, and in those of Cycas, Zamia and Ginkgo, the cilia arise from a centrosome-like body which is found on one side of the nucleus of the spermatozoid mother-cell.

The latter are vacuolated, and contain each a nucleus and several dark granules.

Had his successor been as prudent and able, he might have made a unified Netherlands the nucleus of a mighty middle kingdom, interposing between France and Germany, and a revival of that of the Carolingian Lothaire.

In the egg of these insects a small number of nuclei are formed by the division of the nucleus, and each of these nuclei originates by division the cell-layers of a separate embryo.

In young cells the chromatophores are small, colorless, highly refractive bodies, principally located around the nucleus.

In plants with multinucleate cells, such as Albugo, Peronospora and Vaucheria, it is usually a uninucleate cell differentiated by separation of the nuclei from a multinucleate cell, but in Albugo bliti it is multinucleate, and in Sphaero plea it may contain more than one nucleus.

The two nuclei are successively divided from the egg nucleus in the usual way, but they frequently become absorbed in the peripheral protoplasm instead of being extruded from the egg-cell altogether.

Such condensed nuclei are, in many cases, more readily obtained than the parent nucleus.

Substitution takes place usually in the nucleus and only rarely in the side chain, and according to the conditions of the experiment and the nature of the compound acted upon, one or more nitro groups enter the molecule.

Pigmented cell with resting nucleus.

Oertel thinks that in man we have these two different functions carried on by the one nucleus containing both chromatin orders.

It consists in an unequal number of chromosomes passing over to each of the daughter nuclei, so that one may become hypochromatic, the other hyperchromatic. When this happens the resulting cleavage of the cytoplasm and nucleus is also unequal.

In the earlier accepted notion of direct segmentation, usually known as the schema of Remak, division was described as commencing in the nucleolus, as thereafter spreading to the nucleus, and as ultimately implicating the cell-substance.

The liver cells are seen to contain a large globule of fat which pushes the cell nucleus to one side - giving the signet-ring appearance.

This very likely formed the nucleus of a book which bore the name of that sheik and was much read in the 3rd century from the Flight.

Even the isolated cells of the yeast plant have each one nucleus.

In young asci a similar fusion of two nuclei occurs, and also in basidia, in each case the nucleus of the ascus or of the basidium resulting from the fusion subsequently giving rise by division to the nuclei of the ascospores and basidiospores respectively.

The contents of the antheridium are not set free, but that organ penetrates the oogonium by means of a narrow outgrowth, the fertilizing tube, and a male nucleus then passes over into the single oosphere, which at first multinucleate becomes uninucleate before fertilization.

In the development of the ascus we find two nuclei at the base which fuse together to form the single nucleus of the young ascus.

In these latter cases the reaction may proceed in different directions; thus, with the aromatic hydrocarbons, chlorine in the cold or in the presence of a carrier substitutes in the benzene nucleus, but in the presence of sunlight or on warming, substitution takes place in the side chain.

The nucleus of the county consisted of the lands of Cromarty in the north of the peninsula of the Black Isle.

The analogy of the French epic, the Chanson de Roland, favours the belief that there was some nucleus of fact.

But we have first to consider whether any of the accounts come to us on such evidence that we are bound to consider them as containing a nucleus of truth.

But the original nucleus and parts of the incidents may be the work of a single great poet, and yet other episodes may be of different authorship, wrought into the structure of the poem in later times.

Kirchhoff of Berlin.2 According to Kirchhoff, the Odyssey as we have it is the result of additions made to an original nucleus.

Their territories are in many cases neither compact nor continuous, consisting of a number of villages here and there, with a nucleus of more or less importance round the chief town.

As the great aim of this side of public activity is to secure funds for the maintenance of the state's life and working, the administration which operates for this end is the true nucleus of all national finance.

A special literature of oracles did indeed arise; the divine words were collected and the circumstances which produced them were recorded; and had Delphi become in fact the centre of Greece, as Plato conceived it, here might have been the nucleus of a scripture.

There are three main divisions, Staden, the ancient nucleus of the city, properly confined to Stadholmen (the city island) which divides the stream from Molar into two arms, Norrstrom and Soderstrom; Norrmalm on the north shore of the channel, and Sodermalm on the south.

Its nucleus was a castle, built in 809 by Egbert, one of Charlemagne's counts, against the Danes.

Blom found that on brominating orthoacetamido-acetophenone in presence of water or acetic acid, the bromine goes into the benzene nucleus, whilst in chloroform or sulphuric acid or by use of bromine vapour it goes into the side chain as well.

The may also contain an active galactic nucleus at their center.

These are all regulated from an area of the brain called the suprachiasmatic nucleus, which is in the hypothalamus.

The wall of the nucleus breaks down, and the cytoplasmic spindle-fibres become mixed with those derived from the nuclear network.

The benzene nucleus presents a remarkable case, which must be considered in the formulation of any complete theory of valency.

This is obviously unsymmetrical, consisting of an aliphatic and an aromatic nucleus; Claus explained the formation of the same phthalic acid from the oxidation of either nucleus by supposing that if the aromatic group be oxidized, the aliphatic residue assumes the character of a benzene nucleus.

By reduction, the double linkages become saturated, and compounds result which stand in much about the same relation to the original nucleus as hexamethylene does to benzene.

The fifth compound, on the other hand, does not behave as an unsaturated aliphatic compound, but its deportment is that of a nucleus, many substitution derivatives being capable of synthesis.

This is comparable with the reduction of the benzene nucleus into hexamethylene, a substance of an aliphatic character.

Naphthyridines and naphthinolines result from the condensation of two pryridine and two quinoline nuclei respectively; and quino-quinolines are unsymmetrical naphthyridine nuclei condensed with a benzene nucleus.

The city is built upon the lower slope of the Serra do Ouro Preto, a spur of the Espinhago, deeply cut by ravines and divided into a number of irregular hills, up which the narrow, crooked streets are built and upon which groups of low, old-fashioned houses form each a separate nucleus.

In 1652 a number of people in Westmorland and north Lancashire who had separated from the common national worship,' came under the influence of Fox, and it was this community (if it can be so called) at Preston Patrick which formed the nucleus of the Quaker church.

The original archduchy, which included Upper Austria, is the nucleus of the Austrian empire, and the oldest possession of the house of Habsburg in its present dominions.

The question whether a corpuscle actually has a material gravitating nucleus is undecided, but there are strong reasons for believing that its mass is entirely due to the electric charge.

It was named Sao Paulo, and has been at once the source whence knowledge and civilization have been diffused through Brazil, and the nucleus of a colony of its manliest and hardiest citizens, which sent out successive swarms of hardy adventurers to people the interior.

The nucleus of the new army he found in the Czech mercenaries, seasoned veterans who readily transferred their services to the best payer.

Towards the second half of the 2nd century B.C. this kingdom seems to have become the nucleus of a great state under Scilurus, whose name appears on coins of Olbia, and who at the same time threatened Chersonese in the Crimea.

Perhaps those which were to be sung according to the old Davidic mode formed the nucleus of the collection, and to these were added other poems to be sung according to the more intricate Korahite and Asaphic modes.

The building of the National Portrait Gallery, adjoining it, dates from 1896, but the nucleus of the collection was formed in 1858.

The third natural division of Burma is the old province of Tenasserim, which, constituted in 1826 with Moulmein as its capital, formed the nucleus from which the British supremacy throughout Burma has grown.

This formed the nucleus of his future army.

Those substituted in the benzene nucleus are obtained by condensing two molecules of a substituted benzyl and benzal chlorides.

The kingship formed the nucleus of new governments as the feudal system passed away.

In the case of the pearl oyster this parasite is a cestode larva, but in the less valuable but no less genuine pearl produced by Mytilus, &c., the nucleus is a Trematode-larva (Jameson).

They occasionally exhibit striation and originate from large branched cells, the nucleus and unmodified part of which form conspicuous elements.

The former, which was the original nucleus of all the commercial prosperity of the city, begins on the second Wednesday before Easter; and the latter on the second Wednesday before the 8th of September.

The works erected by the Turks for the capture of the fortress of Arad formed the nucleus of the new town.

But it was also frequently used to denote (in whole or part) that portion of the old Mithradatic kingdom which lay between the Halys (roughly) and the borders of Colchis, Lesser Armenia, Cappadocia and Galatia - the region properly designated by the title "Cappadocia towards the Pontus," which was always the nucleus of the Pontic kingdom.

Thus the three colleges which formed the nucleus of the Imperial University of Tokyo were presided over by a graduate of Michigan College (Professor Toyama), a member of the English bar (Professor HOzumi) and a graduate of Cambridge (Baron Kikuchi).

Since it does not form an addition product with bromine, reduction must have taken place in one of the nuclei only, and on account of the aromatic character of the compound it must be in that nucleus which does not contain the amino group. This tetrahydro compound yields adipic acid, (CH 2) 4 (CO 2 H) 2, when oxidized by potassium permanganate.

The nucleus of the town, the ancient village, lies south of the highroad to Uxbridge, west of the open Ealing Common.

Rutherford had announced the nuclear theory of atomic structure which required each atom to consist of a minute positively charged nucleus about which negative electrons were distributed.

The history of Prester John no doubt originally gathered round some nucleus of fact, though what that was is extremely difficult to determine.

The district originally formed part of the parish of Kilmalcolm, the nucleus of the town being the village of Newark attached to the barony of that name.

Its dualistic system and its anti-social principles were known only to a few, but its antiecclesiastical organization formed a permanent nucleus round which gathered a great deal of political and ecclesiastical discontent.

In 1835 the nucleus of the present district of British Sikkim or Darjeeling was created by a cession of a portion of the hills by the raja of Sikkim to the British as a sanatorium.

The 10th division, forming the nucleus of the 4th Army, had begun to land at Takushan on the 19th of May.

Five centuries later Lauenburg was incorporated with Hanover, and Wittenberg is the nucleus of modern Saxony, the name being thus transferred from the west to the east of Germany.

The latter traced the tubes as far as the nucleus of the ovule.

No portion of the regular army of the Netherlands is allowed to be sent on colonial service, but individual soldiers are at liberty to enlist, by permission of their commanding officers, in the army of Netherlands India, and they form its nucleus.

General Daendels, who was governor from 1808 to 1811, caused the ramparts of the town to be demolished, and began to form the nucleus of a new city at Weltevreden.

The other course is to consider matter as formed of ultimate atoms, each the nucleus or core of an intrinsic modification impressed on the surrounding region of the aether; this might conceivably be of the nature of vortical motion of a liquid round a ring-core, thus giving a vortex atom, or of an intrinsic strain of some sort radiating from a core, which would give an electric atom.

We recognize an atom only through its physical activities, as manifested in its interactions with other atoms at a distance from it; this field of physical activity would be identical with the surrounding field of aethereal motion or strain that is inseparably associated with the nucleus, and is carried on along with it as it moves.

To make room for these we have to remember that the atomic nucleus has remained entirely undefined and beyond our problem; so that what may occur, say when two molecules come into close relations, is outside physical science - not, however, altogether outside, for we know that when the vital nexus in any portion of matter is dissolved, the atoms will remain, in their number, and their atmospheres, and all inorganic relations, as they were before vitality supervened.

An important question arises whether, when a material body is moved through the aether, the nucleus of each atom carries some of the surrounding aether along with it; or whether it practically only carries on its strain-form or physical atmosphere, which is transferred from one portion of aether to another after the manner of a shadow, or rather like a loose knot which can slip along a rope without the rope being required to go with it.

More recently a way has been pointed out in which a mobile permanent field of electric force could exist% in such a medium so as to travel freely in company with its nucleus or intrinsic charge - the nature of the mobility of the latter, as well as its intimate constitution, remaining unknown.

He had as a nucleus but few regular troops, but the energy of the military and civil authorities enabled his force to be augmented by national guards, &c., to 17,600 men.

A small nucleus of the proverbs may be Solomon's; but the great majority represent no doubt the generalizations of a long succession of " wise men."

The transcontinental railway from Limon to Puntarenas was begun in 1871, and forms the nucleus of a system intended ultimately to connect all the fertile parts of the country, and to join the railways of Nicaragua and Panama.

The old town forms a nucleus of narrow, winding streets surrounded by boulevards, beyond which lie modern quarters with regular thoroughfares and public gardens.

Maximilian carried the elaborate etiquette of the court of Vienna to Mexico, but favouring toleration of Protestantism, and the supremacy of the Crown over the Church, he was too liberal for the clericals who had set him up. As a foreigner he was unpopular, and the regiments of Austrians and Belgians which were to serve as the nucleus of his own army were more so.

This encounter roused the New England colonies, and in a few days some 16,000 of their townsmen marched in small bands upon Boston to protest against and resist further similar incursions; and in this irregular body we have the nucleus of the colonial forces which carried the war through.

In B the nucleus is shown.

A - D shows the formation of the two nuclear elements (trophonucleus and kinetonucleus) from the definitive nucleus (synkaryon) of the ookinete.

The larger nuclear body, which corresponds to the trophonucleus of a Trypanosome, is usually round or oval; the smaller one, representing a kinetonucleus, has the form either of a little rod or of a round grain, and is generally separate from the larger nucleus.

In 1904 the formation of a municipally supported gallery of modern art (mainly due to the initiative and generosity of Mr Hugh Lane) was signalized by an exhibition including the pictures intended to constitute the nucleus of the gallery.

Later the sediments lying to the south-east of this " protaxis," or nucleus of the continent, were pushed against its edge and raised into the Appalachian chain of mountains, which, however, extends only a short distance into Canada.

Maildulphus, a Scottish or Irish monk, who came into England about 635, built a hermitage near the site of the modern Malmesbury (Maildulphi-urbs, Maldelmesburh, Malmesbiri) and gathered disciples round him, thus forming the nucleus of the later abbey of which Aldhelm his pupil became the first abbot.

If we say that he carried on a successful war against the Saxons, was probably betrayed by his wife and a near kinsman, and fell in battle, we have stated all which can be claimed as an historical nucleus for his legend.

The flame then appears as a long, narrow, luminous cone, the end being enveloped by a dimly visible portion of flame corresponding to that which surrounds the free flame, while there is also a dark nucleus about the wick.

Taken as a whole it is modern in aspect, but its regularity of form is in reality derived from the ancient Roman town of Augusta Taurinorum, which formed its nucleus.

Hewitt has also attacked the problem by brominating the oxyazobenzenes, and has shown that when the hydrobromic acid produced in the reaction is allowed to remain in the system, a brombenzene-azo-phenol is formed, whilst if it be removed (by the addition of sodium acetate) bromination takes place in the phenolic nucleus; consequently the presence of the mineral acid gives the azo compound a pseudo-quinonoid character, which it does not possess if the mineral acid be removed from the sphere of the reaction.

We have thus the nucleus of that international parliament which idealist peacemakers have dreamt of since the time of Henry IV.'s " grand design."

The upper basin of the Trent formed the nucleus of the kingdom of Mercia (q.v.), while farther down the east coast was the kingdom of East Anglia.

To get a better share in the European trade at the mouth of the river a body of colonists migrated further down and built Obutöng or Old Town, and shortly afterwards a rival colony established itself at Aqua Akpa or Duke Town, which thus formed the nucleus of the existing town.

The only effect of adding solvent will be to separate further from each other the systems composed of solute particle as nucleus and solvent as atmosphere; it will not affect the action of each nucleus on its atmosphere.

It is thought to depend upon some connexion, not yet anatomically demonstrated, between the third cranial nerve and its nucleus in the floor of the iter and the substantia nigra.

Once afterwards (1898) he held office as minister of home affairs, and in 1900 he stepped down from the leadership of the Jiyu-tõ in order that the latter might form the nucleus of the Seiyu-kai organized by Count Ito.

There was thus very strong circumstantial evidence in favour of fertilization, although the male nucleus was not traced.

The nucleus of a cosmopolitan society thus formed has expanded into a powerful community enjoying privileges and immunities unknown to natives not receiving its protection.

The single nucleus divides by three successive divisions to form eight nuclei lying free in the protoplasm of the ascus.

Then by a special method, described first by Harper, a mass of protoplasm is cut out round each nucleus; thus eight uninucleate ascospores are formed by free-cell formation.

Under other conditions, of which the temperature is an important one, the nucleus in the yeast-cell divides, and each daughter-nucleus again, and four spores are formed in the mother cell, a process obviously comparable to the typical development of ascospores in an ascus.

The study of the nucleus of yeast-cells is rendered difficult by the presence of other deeply staining granules termed by Guillermond naetachromatic granules.

In the process of budding the nucleus divides apparently by a process of direct division.

In the formation of spores the nucleus of the cell divides, the protoplasm collects round the nuclei to form the spores by free-cell formation; the protoplasm (epiplasm) not used in this process becomes disorganized.

De Bary brought forward very strong evidence for the origin of the ascocarp in Sphaerotheca and Erysiphe by a sexual process, but Harper in 1895 was the first to prove conclusively, by the observation of the nuclear fusion, that there was a definite fertilization in Sphaerotheca Humuli by the fusion of a male (antheridial) nucleus with a female, ascogonial (oogonial) nucleus.

C, A basidium before the four nucleiderived from the secondary nucleus of the basidium have passed into the four basidiospores.

There we find an association of nuclei either by the fusion of two similar cells as described by Christmann or by the migration of the nucleus of a vegetative cell into a special cell of the aecidium.

Whether B, Formation of the first sporethe association of nuclei in the mother-cell (sm), from the ordinary mycelium takes place basal cell (a) of one of the by the migration of a nucleus rows of spores.

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.

Jochem (Ber., 1901, 34, p. 3337), who arrived at the conclusion that the normal decomposition of diazonium salts by alcohols results in the formation of phenolic ethers, but that an increase in the molecular weight of the alcohol, or the accumulation of negative groups in the aromatic nucleus, diminishes the yield of the ether and increases the amount of the hydrocarbon formed.

These iso-diazotates are formed much more readily when the aromatic nucleus in the diazonium salt contains negative radicals.

Concentrated acids convert them into the isomeric nitro-amines, the - NO 2 group going into the nucleus in the orthoor paraposition to the amine nitrogen; this appears to indicate that the compounds are nitramines.

The nucleus of the city is built on low-lying ground on the east coast of the island of Zealand, between the sea and a series of small freshwater lakes, known respectively as St JOrgens So, Peblings So and Sortedams So, a southern portion occupying the northern part of the island of Amager.

So early as the 11th century her merchants were settled in London, their colony forming the nucleus of the Steelyard.

The fine and extensive buildings, of which the nucleus is a mansion of the 17th century, contain a public school for boys and a house of studies for Jesuit ecclesiastics, while there is a preparatory school at a short distance.

The heads of the various departments 01 state do not form, as in England, the nucleus of a cabinet.

In addition, each would leave behind depot troops to form the nucleus on which the 2nd ban Landwehr and the Landsturm would eventually be built up. The total number of units of the three arms in all branches may be stated approximately at 2200 battalions, 780 squadrons and 950 batteries.

The middle states, headed by Wurttemberg, had drawn together, to form the nucleus of an inner league of pure German States against Austria and Prussia, and of Liberal particularism against the encroachments of the diet.

This reunion of the Conservatives became the nucleus of a great reaction against Liberalism.

They took the name of the Liberale Vereinigung, but were generally known as the Sezessionisten; they hoped to become the nucleus of a united Liberal party in which all sections should join together on the principles of Free Trade and constitutional development.

Thus a nucleus and precedent has been formed similar to that by which the Zoilverein was begun, and it was hoped that it might be possible to arrange similar agreements with other states, so that in this way a common management for all lines might be established.

The original nucleus of the city is that portion which lies to the east of the port in the neighbourhood of the old pier (Molo Vecchio).

The first nucleus round which the present dominions of the house of Austria gradually accumulated was the mark which lay along the south bank of the Danube, east of the river Origin of Enns, founded about A.D.

It was impossible to maintain a strong party of moderate constitutionalists, on whom the government could depend, unless there was a large nucleus from Lower Austria.

It was the beginning and the nucleus of an agitation that eventually pervaded and filled every part of the country.

The American Anti-Slavery Society, of which Garrison was the president from 1843 to the day of emancipation, was during all this period the nucleus of an intense and powerful moral agitation, which was greatly valued by many of the most faithful workers in the field of politics, who respected Garrison for his fidelity to his convictions.

The above-mentioned nucleus, combined with other chapters of more recent origin, is found in the papyri of the XVIIIthXXth Dynasties, and forms the so-called Theban recension, which has been edited by Naville man important work.

He found a rival in Egypt in the person of Ibn al-Modabbir, the finance minister, who occupied an independent position, and who started the practice of surrounding himself with an army of his own slaves or freedmen; of these Ibn Tulun succeeded in depriving the finance minister, and they formed the nucleus of an army by which he eventually secured his own independence.

He also saw in the campaign a means of getting rid of the disaffected troops, and of obtaining a sufficient number of captives to form the nucleus of the new army.

Although the cell body or perikaryon of the neuron, with its contained nucleus, is essential for the maintenance of the life of the cell branches, it has become recognized that the actual process and function of "conduction" in many neurons can, and does, go on without the cell body being directly concerned in the conduction.

But the proper nutrition of the conducting substance is indissolubly dependent on the cell branches being in continuity with the cell body and nucleus it contains.

Most marked is the decrease in the volume of the nucleus, amounting even to 44% of the initial volume.

From the organ there emerge fibres which cross to the opposite red nucleus, and directly or indirectly reach the thalamic region of the crossed hemisphere.

The nucleus of the tube-cell has meanwhile passed into the tube, as does also the generative nucleus which divides to form two maleor spermcells.

The germination of the macrospore consists in the repeated division of its nucleus to form two groups of four, one group at each end of the embryo-sac. One nucleus from each group, the polar nucleus, passes to the centre of the sac, where the two fuse to form the so-called definitive nucleus.

The gametophyte or prothallial generation is thus extremely reduced, consisting of but little more than the male and female sexual cells - the two sperm-cells in the pollen-tube and the egg-cell (with the synergidae) in the embryo-sac. At the period of fertilization the embryo-sac lies in close proximity tube has penetrated, the separating cell-wall becomes absorbed, and the male or sperm-cells are ejected into the embryosac. Guided by the synergidae one male-cell passes into the oosphere with which it fuses, the two nuclei uniting, while the other fuses with the definitive nucleus, or, as it is also called, the endosperm nucleus.

It has long been known that after fertilization of the egg has taken place, the formation of endosperm begins from the endosperm nucleus, and this had come to be regarded as the recommencement of the development of a prothallium after a pause following the reinvigorating union of the polar nuclei.

The signification of the coalescence of the polar nuclei is not explained by these new facts, but it is noteworthy that the second male-cell is said to unite sometimes with the apical polar nucleus, the sister of the egg, before the union of this with the basal polar one.

The proof of a coalescence of the second male nucleus with the definitive nucleus gives the conception a more stable basis.

The formation of endosperm starts, as has been stated, from the endosperm nucleus.

In two Malayan species of Balanophora, the embryo is developed from a cell of the endosperm, which is formed from the upper polar nucleus only, the egg apparatus becoming disorganized.

These were (1) the division of the fyrd or national militia into two parts, relieving each other at fixed intervals, so as to ensure continuity in military operations; (2) the establishment of fortified posts (burgs) and garrisons at certain points; (3) the enforcement of the obligations of thanehood on all owners of five hides of land, thus giving the king a nucleus of highly equipped troops.

Occupying as these algae do perhaps the lowest grade of plant life, it is a matter of interest to ascertain whether a nucleus or chromatophore is differentiated in their cells, or whether the functions and properties of these bodies are diffused through the whole protoplast.

Olive, claim that this body is a true nucleus comparable with that of the higher plants.

Wager speaks with greater reserve, acknowledging, however, the central body to be a nucleus of a rudimentary type, but devoid of nuclear membrane and nucleolus.

Oedogonium sp., intercalated growth by insertion of new piece(a) n., nucleus; p.v., pulsating vacuoles; e.s., eyespot.

Embedded in the chromatophore, much in the same way as the nucleus is embedded in the cytoplasm, are the pyrenoids.

That the antherozoid of Vaucheria contains a single nucleus had been inferred before.

This is the carpogonium; it consists of a ventral portion which contains a nucleus, but in which no oosphere is differentiated, and an elongated tubular portion known as the trichogyne, into which the cytoplasm extends.

Fertilization is effected by the passive convection of a spermatium from the antheridium to the trichogyne, to which it adheres, and to which it passes over its nucleus through an open communication set up at the point of contact.

The nucleus then passes down the trichogyne and fuses with that of the egg.

He founded his generalization to a large extent upon the observation that in Gloeosiphonia capillaris two cells completely fuse, and that only one nucleus can be detected in the fused mass.

Oltmanns has recently re-investigated the phenomena in this plant, among others, and has shown that the nucleus of the cell which is being preyed upon recedes to the wall and gradually atrophies.

The nucleus of the ooblastema filament dominates the FIG.

Among the secular buildings the first place is taken by the royal palace in Buda, which, together with the old fortress, crowns the summit of a hill, and forms the nucleus of the town.

To the 4th century belongs, according to Kamper (Die deutsche Kaiseridee, 1896, p. 18) and Sackur (Texte and Forschungen, 1898, p. 114 &c.), the first nucleus of the "Tiburtine" Sibyl, very celebrated in the middle ages, with its prophecy of the return of 3 Harnack, Chronologie der altchristlichen Literatur, i.

The nucleus of the later county and duchy was the gau or district surrounding the town of Gelder or Gelre, lying between the Meuse and the Niers, and since 1715 included in Rhenish Prussia.

The oldest nucleus of historical tradition appears to belong to Samaria, but it has been adjusted to other standpoints or interests, which are apparently connected partly with the half-Edomite and partly with the old indigenous Judaean stock.'

In this case, as in that of the Edomites, it is natural to suppose that there existed already a nucleus of professing Jews which made the wholesale conversion possible.

The greater part of the peshwa's dominions was ultimately incorporated in the Bombay presidency, while the nucleus of the Central Provinces was formed out of territory taken from the peshwa and the raja of Nagpur.

The purchase of Assab and the neighbouring region for L1880, from the sultan Berehan of Raheita for use as a coaling station by the Italian Rubattino Steamship Company, in March 1870, formed the nucleus of Italy's colonial possessions.

Hajjaj, however, was not the man to allow the formation of a fresh nucleus of sedition, and persuaded the caliph to dismiss Omar in the year 712, and appoint Othman b.

But around this nucleus there soon grew up the great metropolis which was to be the centre of the civilized world as long as the Caliphate lasted.

There is no proper nucleus of mountains whence chains ramify in different directions.

To this nucleus were added 6160 recruits, the contingent for that year of young men twenty-one years of age compelled to serve with the colours.

As soon as her fortunes began to mend she started a small home for poor girls at Ruel, which she afterwards moved to Noisy, and which was the nucleus of the splendid institution of St Cyr, which the king endowed in 1686, at her request, out of the funds of the Abbey of St Denis.

These colonists formed the nucleus of the provincial military levy, and were a tower of strength to the Persian dominion.

The nucleus of the army was formed of armoured horsemen, excellently practised for long-distance fighting with bow and javelin, but totally unable to venture on a hand-to-hand conflict, their tactics being rather to swarm round the enemys squadrons and overwhelm them under a hail of missiles.

The great emperor Htaclius, who assumed the crown in 610, took years to create the nucleus of a new military power.

Omar II., however, extended to non-Arabic Moslems immunity from all taxes except the zakat (poor-rate), with the result that a large number of Persians, who still smarted under their defeat, under Mokhtar, embraced Islam and drifted into the towns to form a nucleus of sedition under the Shiite preachers.

The naval and military forces were disbanded, but Charles managed to retain under the name of guards three regiments, which remained the nucleus of a standing army.

A few years later, influenced perhaps in part by Persian gold, they forced on the so-called Corinthian War and formed the nucleus of the league against Sparta.

This force, though aided by considerable bodies of local militia and volunteers in the northern and western provinces, was insufficient to cope with the 60,000 Carlists in arms, and with the still formidable nucleus of cantonalists around Alcoy and Cartagena.

In 1851 the first Committee of Vigilance was formed and served from June to September, when it disbanded; it was the nucleus of the second and greater committee, active from May to August of 1856.

They are characterized by the absence of ordinary sexual reproduction and by the absence of an ordinary nucleus.

Thus arose the foundations of the modern " germ theory of disease;" and, in the midst of the wildest conjectures and the worst of logic, a nucleus of facts was won, which has since grown, and is growing daily.

The question of the existence of a nucleus in the bacteria is one that has led to much discussion and is a problem of some difficulty.

In the majority of forms it has not hitherto been possible to demonstrate a nucleus of the type which is so characteristic of the higher plants.

Attention has accordingly been directed to the deeply-staining granules mentioned above, and the term chromatin-granules has been applied to them, and they have been considered to represent a rudimentary nucleus.

That these granules consist of a material similar to the chromatin of the nucleus of higher forms is very doubtful, and the comparison with the nucleus of more highly organized cells rests on a very slender basis.

Thus in diphtheria changes in both nerve cells and nerve fibres have been found, and in tetanus minute alterations in the nucleus and protoplasm of nerve cells.

The oldest and most important of the eight convents at Salzburg is the Benedictine abbey of St Peter founded by St Rupert as the nucleus of the city.

The nucleus of the present city was the monastery and bishopric founded here about 700 by St Rupert of Worms, who had been invited by Duke Theodo of Bavaria to preach Christianity in his land.

The presence of the phenanthrene nucleus and the chain system CH 3 N C C follows from the fact that these alkaloids, by appropriate treatment, yield a substituted phenanthrene and also dimethylaminoethanol (CH3)2N CH2 CH20H.

Formulae have been proposed by Pschorr and Knorr explaining this and other decompositions (in Pschorr's formula the morphine ring system is a fusion of a phenanthrene and pyridine nucleus); another formula, containing a fusion of a phenanthrene with a pyrrol ring, was proposed by Bucherer in'1907.

The nucleus of the city occupies an island formed by the North and South Channels, two arms of the river Lee, and in former times no doubt merited its name, which signifies a swamp. In the beginning of the 18th century, indeed, this island was broken up into many parts connected by drawbridges, by numerous small channels navigable at high tide.

On the constitution of the pyridine nucleus, see K6rner, Gior.

In both orographical systems the principal rivers start nearly all together from a central nucleus, and in both cases they radiate to opposite quarters of the compass; but whereas in the Alps the Rhone and the Rhine, flowing south-west and north-east respectively, follow longitudinal valleys, and the Aar and the Ticino, flowing north-west and south-east respectively, follow transverse valleys, in the Caucasus the streams which flow south-west and north-east, namely, the headwaters of the Rion and the Terek, travel along transverse valleys, and those of the Kura and the Kuban, flowing south-east and north-west respectively, traverse longitudinal valleys.

Wilamowitz-Mollendorff ascribes the nucleus of these Scholia to Theon, who wrote similar scholia on Lycophron and Apollonius Rhodius, and is stated to have written a commentary on Theocritus. ?

His library, which contained a very extensive collection of Greek MSS., was presented by him to the senate of Venice, and formed the nucleus of the famous library of St Mark.

The original seat and present home of the nucleus of the Maronites is Mt Lebanon; but they are also to be found in considerable force in Anti-Lebanon and Hermon, and more sporadically in and near Antioch, in Galilee, and on the Syrian coast.

The nucleus of the town lies within the innermost crescent canal, and, with the large square, the Dam, in the centre, represents the area of Amsterdam about the middle of the 14th century.

The nucleus of this unsurpassed national collection of pictures was formed out of the collections removed hither from the Pavilion at Haarlem, consisting of modern paintings, and from the town-hall, the van der Hoop Museum and the Trippenhuis in Amsterdam.

In the course of division two bodies appear in the cytoplasm, and behave as centrosomes during the karyokinesis; they gradually become threadlike and coil round each daughter nucleus.

The nucleus of the microspore divides and gives rise to a small cell within the large cell, a second small cell is then produced; this is the structure of the ripe pollen-grain in some conifers (Taxus, &c.).

The large cell grows out as a pollen-tube; the second of the two small cells (body-cell) wanders into the tube, followed by the nucleus of the first small cell (stalk-cell).

In Taxus the body-cell eventually divides into two, in which the products of division are of unequal size, the larger constituting the male generative cell, which fuses with the nucleus of the egg-cell.

Before fertilization the nucleus of the egg-cell divides and cuts off a ventral canal-cell; this cell may represent a second egg-cell.

In the process of fertilization the two male generative nuclei, accompanied by the pollen-tube nucleus and that of the stalk-cell, pass through an open pit at the apex of the pollen-tube into the protoplasm of the ovum.

After fertilization the nucleus of the egg divides, the first stages of karyokinesis being apparent even before complete fusion of the male and female nuclei has occurred.

The northern part, Behar, constituted the ancient kingdom of Magadha, the nucleus of the imperial power of the successive great dynasties of the Mauryas, Andhras and Guptas; and its chief town, Patna, is the ancient Pataliputra (the Palimbothra of the Greeks), once the capital of India.

On a slightly raised strip of land between the head of Back Bay and the harbour is situated the fort, the nucleus of the city of Bombay.

Those with the hydroxyl group in the benzene nucleus are prepared from the aminophenols by the Skraup reaction.

In Isaiah and Zechariah, notably, older and later groups of prophecies are preserved, whereas here the new preludes and new sequels suggest that the original nucleus has passed through the hands of writers in touch with those vicissitudes of thought which can be studied more completely elsewhere.

But there is small doubt that the system was working to some extent in the later wars of the great king, and that his successes were largely due to the fact that his army contained a larger nucleus of fully armed warriors than those of his predecessors.

For the Scottish kings, deserting their native Highlands, took to dwelling at Edinburgh among their new subjects, and first the court and afterwards the whole of their Lowland subjects were gradually assimilated to the Northumbnian nucleus which formed both the most fertile and the most civilized portion of their enlarged realm.

By the end of the reign the little hosts of badged adherents which had formed the nucleus for the armies of the Wars of the Roses had ceased to exist.

In the Wycliffite remnant, often persecuted but never exterminated, there already existed in England the nucleus of a Protestant party.

The latter has formed the nucleus of modern Dembre, which has been increased by settlers from the Greek island of Castelorizo.

The tops of most of the buildings and the whole nucleus of the temple of Isis to the floor remained all the year round above the water level until the dam was raised another 26 ft.

The traders who accompanied them were the nucleus of the first English-speaking colony on Wisconsin soil.

A moderate scholar of our day can find no historical nucleus, and calls it a sort of historical romance.'

There are many musical clubs, and a spring festival for which a local chorus furnishes the nucleus, is held annually.

If it be positive, a widely extending patch is seen on the plate, consisting of a dense nucleus, from which branches radiate in all directions; if negative the patch is much smaller and has a sharp circular boundary entirely devoid of branches.

If the plate receives a mixed charge, as, for example, from an induction coil, a "mixed" figure results, consisting of a large red central nucleus, corresponding to the negative charge, surrounded by yellow rays, corresponding to the positive charge.

At the end of the 5th century Maine, a relative of the king of Tara, was apportioned a tract of Firbolg territory to the west of the Suck in Connaught, which formed the nucleus of a powerful state known as Hy Maine (in English commonly called the " O'Kelly's country ").

Taramelli (Notizie degli Scavi, 1905, 41 seq.) rightly points out that the nucleus of the Roman municipium is probably represented by the present quarter of the Marina, in which the streets intersect at right angles and Roman remains are frequently found in the subsoil.

This nucleus extended both to the east and to the west; in the former direction it ran some way inland, on the east of the castle hill.

The nucleus of the island is a block of Archean rocks, which are not, so far as is known, extensively exposed.

When Gero died in 965, his mark was divided into two parts, the northern portion, lying along both banks of the middle Elbe, being called the north or old mark, and forming the nucleus of the later margraviate of Brandenburg.

It consists of four great peninsulas, extending from a comparatively small nucleus towards the north-east, east, south-east and south, and separated by the three large gulfs of Tomini or Gorontalo, Tolo or Tomaiki, and Boni.

This Notch fragment is translocated to the nucleus where it interacts with DNA-binding proteins, and together they act as transcriptional activators.

Accurate optical astrometry would locate these peaks relative to the nucleus as defined by the radio core, and so resolve this ambiguity.

The nucleus of a hydrogen atom is a proton.

The typical helium atom consists of a nucleus of two protons and two neutrons surrounded by two electrons.

The nucleus may remain behind the iris or it may not be possible to mobilize it at all into the anterior chamber.

The Golgi apparatus is usually found close to the cell nucleus and consists of one or more stacks of membrane-bound cisternae (sacs ).

It gives access to an ample gastric pouch, covered with very evident cells, whose granular cytoplasm surrounds a clear nucleus.

Select your answer ----------------- cell wall nucleus cytoplasm cell membrane 5 Which of the following types of cell is a plant cell?

The extension to a nucleus with an axially deformed ground state is straightforward.

These often form around a nucleus of some sort, which could be a sponge skeleton or other marine detritus.

Ordinary hydrogen has only one proton in the nucleus, while the isotope deuterium has one proton + one neutron.

Provide adequate viscoelastic material (HPMC) in front and behind the nucleus to protect the endothelium as this is an open chamber.

She is a transgenic sheep produced by transfer of the nucleus of a cultured fetal fibroblast.

Nik and Mrs fiend remain a nefarious nucleus, able to attract the finest in contributing satellites for their ravishing reverberations.

The nucleus is is this risky opening gavel was sounded the edge of hysteria.

Theories of halo nucleus scattering often use an approximation in which the halo nucleus scattering often use an approximation in which the halo is appeared frozen during the collision.

In the nucleus, there are globular proteins called histones, which the DNA wraps itself around.

These results indicate that disruption of the nucleus accumbens or lateral hypothalamus alter the expression of emotional behaviors.

Often, a plant intron is introduced into the code for the bacterial enzyme to enhance transport of the message from nucleus to cytoplasm.

This picture shows an electron micrograph of a nucleus.

As for those who simply consider themselves the « nucleus » of the revolutionary party, they show a little more modesty.

Of the remaining preganglionic motoneurons, roughly 20% of the total are located dorsal to the oculomotor nucleus.

The ORF3 protein also enters the cell nucleus, specifically targeting the nucleolus.

This latter feature differentiates Trichamoeba from the otherwise similar Saccamoeba which has a nucleus with a single large nucleolus.

These electrical pulses are delivered through the extension and through the lead to the globus pallidus or subthalamic nucleus in the brain.

A proton in an atomic nucleus has an equal positive charge.

Note the red dot in the white matter just left of the caudate nucleus in the upper middle of the left hemisphere.

In 2002, they examined the region of the brain's hypothalamus containing the arcuate nucleus, or ARC.

The alpha particle is a helium nucleus - one of the products of a nuclear fission.

Theories of halo nucleus scattering often use an approximation in which the halo is appeared frozen during the collision.

The SOHO imaging shows sunlight reflecting off gas and dust from the comet's nucleus and hydrogen solar wind from the sun.

Nucleus a cell organelle which contains the chromosomes whose genes control the structure of proteins within the cell.

Human cloning produces an embryo by fusing the nucleus of a body cell with an enucleated ovum.

It is transferred to a unfertilised human ovum which has had its original nucleus removed.

Nuclear Label - A single cell nucleus emitting light from red and green fluorescent probes used to detect cellular abnormalities.

The Nucleus Micro produces a vast soundstage and pinpoint imaging, in a beautifully small, visually attractive package.

Walter Kolch's laboratory studies signal transduction, the means by which cells communicate information about their environment to the nucleus.

Nuclear translocation - In every known clock, a key step is the translocation of a protein from the cytoplasm into the nucleus.

Within the brain stem, the signals traveling through the trigeminal nerve reach specialized clusters of neurones called the trigeminal nerve nucleus.

Middle Saccamoeba showing contractile vacuole (CV) distending the uroid, and the nucleus (N ).

The seamen of Dieppe are said to have discovered the river about 1360, and even to have built a fort which became the nucleus of the town of St Louis, but this claim is unproved (see Guinea).

A portion of the nucleus of the parent cell makes its way through the extremely narrow neck into the daughter cell.

Round this nucleus her characters (too often mere puppets) grouped themselves, and the story gradually crystallized.

In some cases they come and go, or dissolve into an aether round the sun; but in other cases they gradually increase until they form a dense crust round the central nucleus.

Intrusions of granitic massifs in the Devonian period formed the primitive mountain axis of Victoria, which extends east and west across the state and forms the nucleus of the Victorian highlands.

At first these picked men only existed in Cromwell's own troop, which, however, by frequent additions became the nucleus of a regiment, and by the time of the New Model included about ii,000 men.

In the middle ectoderm cell are seen a nucleus and three nematocysts, with trigger hairs projecting beyond the cuticle.

Endosperm is formed as the result of the fusion of the second male cell with the so-called definitive nucleus of the embryo-sac (see ANGlOSPERMS).

The Nucleus.The nucleus has been demonstrated in all plants with the exception of the Cyanophyceae and Bacteria, and even.

The nucleus is regarded as a controlling centre of cell-activity, upon which the growth and development of the cell in large measure depends, and as the agent by which the transmission of specific qualities from one generation to another is brought about.

Our knowledge of the chemical constitutions of the nucleus is due to the pioneer researches of Sir Lauder Brunton, Plosz, Miescher, Kossel and a host of more recent investigators.

Mitosis.In indirect nuclear division the nucleus undergoes a series of complicated changes, which result in an equal division.

A layer of delicate filamentous cytoplasmkinoplasmmay collect around the nucleus, or at its poles, out of which the spindle is formed.

In Characeae and Muscineae they are of elongate spiral form, and consist of an elongate dense nucleus and a small quantity of - cytoplasm.

Even in the multinucleate oosphere of Albugo bliti the nuclei fuse in pairs; and in the oospheres of Sp/zaero plea, which may contain more than one nucleus, the egg nucleus is formed by the fusion of one only of these with the spermatozoid nucleus (Klebahn).

The Nucleus in Relation to Heredity.There is a certain amount of cytological evidence to show that the nucleus is largely concerned with the transmission of hereditary characters.

On the other hand, the complex structure of the nucleus with its separate units, the chromosomes, and possibly even smaller units represented by the chromatin granules, and the means taken through the complex phenomena of mitosis to ensure that an exact and equal division of the chromosomes shall take place, emphasizes the importance of the nucleus in heredity.

Further, it is only in the nucleus and in its chromosomes that we have any visible evidence to account for the Mendelian .segregation of characters in hybrids which are known to occur.

From numerous investigations which have been made to trace the chromosomes through the various stages of the nuclear ontogeny of plant cells, it appears that the individuality and continuity of the chromosomes can only be conceived as possible if we assume the existence of something like chromosome centres in the resting nucleus around which the chromosomes become organized fon purposes of division.

The two great masses of Cadmus (Baba-dagh) and Salbacum (Boz-dagh), which are in fact portions of the great chain of Taurus (see Asia Minor), form the nucleus to which the whole physical framework of the country is attached.

The favourite name " Israel " with all its religious and national associations is somewhat ambiguous in an historical sketch, since, although it is used as opposed to Judah (a), it ultimately came to designate the true nucleus of the worshippers of the national god Yahweh as opposed to the Samaritans, the later inhabitants of Israelite territory (c).

But the recovery of successive historical nuclei does not furnish a continuous thread, and if one is to be guided by the historical context of events the true background to each nucleus must be sought.

If then by the contraction of the earth's interior the outer crust were forced to accommodate itself to a smaller nucleus, the central softer belt would yield by crumpling; the more rigid masses to the north and south, if they gave way at all, would yield by faulting.

The latter two, uniting with the two retiring consuls, Sieyes and Ducos, were to form the nucleus of the senate and choose the majority among its full complement of sixty members, the minority being thereafter chosen by co-optation.

The only evidence we have in pathology of living structures in which apparently a differentiation into cell-body and nucleus does not exist, is in the case of bacteria, but then there comes the question whether they may not possess chromatin distributed through their substance, in the form of metachromatic points, as is the case in some infusoria (Trachelocerca, Gruber).

Here then we have the basis of a view in which there are not two media to be considered, but one medium, homogeneous in essence and differentiated as regards its parts only by the presence of nuclei of intrinsic strain or motion - in which the physical activities of matter are identified with those arising from the atmospheres of modified aether which thus belong to its atoms. As regards laws of general physical interactions, the atom is fully represented by the constitution of this atmosphere, and its nucleus may be left out of our discussions; but in the problems of biology great tracts of invariable correlations have to be dealt with, which seem hopelessly more complex than any known or humanly possible physical scheme.

Special deposits of the nacreous matter around foreign bodies form pearls, the foreign nucleus being usually of parasitic origin (see Pearl).

To get a better share in the European trade at the mouth of the river a body of colonists migrated further down and built Obutöng or Old Town, and shortly afterwards a rival colony established itself at Aqua Akpa or Duke Town, which thus formed the nucleus of the existing town.

Once afterwards (1898) he held office as minister of home affairs, and in 1900 he stepped down from the leadership of the Jiyu-tõ in order that the latter might form the nucleus of the Seiyu-kai organized by Count Ito.

In relation to the view that the spermatia are sexual cells, or at least were primitively so, it must be pointed out that although the actual fusion of the spermatial nucleus with a female nucleus has not been observed, yet in a few cases the spermatia have been seen to fuse with a projecting portion (trichogyne) of the ascogonium, as in Collema and Physcia, and there is very strong circumstantial evidence that fertilization takes place (see later in section on development of ascocarp).

He began by founding the Order of the Immaculate Conception, consisting of 72 young noblemen who swore a special oath of allegiance to the crown, and were to form the nucleus of a patriotic movement antagonistic to the constant usurpations of the diet, but the sejm promptly intervened and quashed the attempt.

Ladenburg (1883, 1887) demonstrated that the molecule contained a reduced pyridine nucleus.

The basic science of fusing the cytoplasm and nucleus and reactivating the cell is very poorly understood.

They suggest that, within the nucleus of the cell, homologous recombination of genomic DNA with these fragments takes place.

The released SREBP can then translocate to the cell nucleus to regulate transcription of genes for enzymes involved, e.g., in cholesterol synthesis.

Within the cell, the viral RNA is replicated entirely in the cytoplasm, outside the nucleus containing the cell's own genetic material.

Translation Messenger RNA then passes out of the nucleus and travels to small structures called ribosomes in the cytoplasm.

These shapes are expected to occur when the nucleus is rotating at high speeds.

Nuclear transfer is carried out by fusing the donor somatic cell to an egg whose own nucleus has been removed.

False nucleus is a bright, white starlike object with possibly 3 jets glimpsed briefly during moments of steady seeing?

The Dockyard was built up around the nucleus of a storehouse for naval supplies built in 1513.

A single cell in the human body contains 2 meters of DNA packed into a nucleus only 5 thousandths of a millimeter across.

Walter Kolch 's laboratory studies signal transduction, the means by which cells communicate information about their environment to the nucleus.

The electrons have an orbit of minimum energy from which they cannot fall into the nucleus without violating the uncertainty principle.

Middle Saccamoeba showing contractile vacuole (CV) distending the uroid, and the nucleus (N).

Uncornified epithelial cells are rounded with smooth edges and have a dark nucleus.

In the brain's hypothalamus, a special supra chiasmatic nucleus (SCN) responds by sending messages to the other parts of the body to get you moving, including hormones.

Genes, found in the nucleus of all the body's cells, control cell function by serving as the blueprint for the production of proteins.

The protein made by the ATM gene is located in the nucleus of the cell and normally functions to control the rate at which the cell grows.

Chromosomes are structures in the nucleus of every cell in the human body that contain the genetic information necessary to direct the growth and normal functioning of all cells and systems of the body.

The function of the affected protein may involve translation of genetic messages in a cell's nucleus.

The virus enters the body through mucosal surfaces, replicates in the cell nucleus, and then kills the host cell.