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Abstract blue microbe shape with darker internal spots representing cellular components-stock-foto
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. Lituolites difformis 177 Lituolites difformis - - Print - Iconographia Zoologica - Special Collections University of Amsterdam - UBAINV0274 113 03 0004-stock-foto
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Desulforudis audaxviator-stock-foto
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. Text-book of structural and physiological botany . Fig. io.—Tabular cellfrom the epidermis ofCallitriche. Fig. II.—Irregularly stellate cell: a uni-cellular Alga, Euastru77t crux-neliten-sis. ( X 400.) example, is from 0*001 to 0*002 mm. broad and long;the diameter of pollen-grains, which also consist of a singlecell, varies between o*i and 0*0075 mm.; the lignified cellsin the wood of the oak i^Quercuspedicellata) have an averagelength of about 0*7 mm., and those in the trunk of the silverfir, Abiespedinata, one of from 2 to 3 mm. There are, how-ever, cells of a considerably larger size, es-stock-foto
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A manual of practical medical electricity : the Röntgen rays and Finsen light . parallel, and thenthese two groups in series ; that would be equivalent toconnecting two cells, each five times as large as a singlecell, in series. The E. M. F. would therefore be that of twocells, viz., four volts, and the internal resistance that of oneohm divided by five + one ohm divided by five. Thus: E ^ 4 volts 4 o o = C. —^ =^ . r— = -T^ = 88 amperes. R-hr ? 0-05-I-0*2+ 0*2 ohms 0-45 Six cells so connected are shown in Fig. 34. A battery of a given number of cells will send the strongestcurrent through a g-stock-foto
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. The bird, its form and function . olutions to the thousand andone problems which offer themselves. What we know inrespect to eggs is fragmentary and rests on so slight adegree of proof that every theory is attacked and re-attacked in turn. Supposing that the eggs of the early forms of birdswere round,—that being the most typical form of a singlecell,—we find many variations in shape among the eggsof living species. Many of the eggs which are laid inhollow trees still retain the primitive spherical form, per-haps an advantage in keeping the eggs in a close groupin the centre of the floor of t-stock-foto
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'Der Organismus der Infusionsthiere' details the biology and structure of Infusoria, a group of microorganisms such as Ciliates. This scientific work by Friedrich von Stein explores these organisms, focusing on their anatomy, reproduction, and ecological roles. The illustrations in the text depict various ciliates, essential for understanding their life cycle.-stock-foto
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. The structure and development of mosses and ferns (Archegoniatae). er cells, all, how^ever, unmistakably the product of a singlecell, and if a comparison is to be made with the antheridium ofany other Liverwort, the antheridium in the latter is homol-ogous, not with the single one of Anthoceros, but with thewhole group, plus the two-layered upper wall of the cavity inwhich they lie. The first divisions in the antheridium are the same as thosein the original cell, i.e., the young antheridium is divided longi-tudinally by two intersecting walls, and the separation of the9 I30 MOSSES AND FERNS-stock-foto
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. Text-book of structural and physiological botany . Fig. io.—Tabular cellfrom the epidermis ofCallitriche. Fig. II.—Irregularly stellate cell: a uni-cellular Alga, Euastru77t crux-neliten-sis. ( X 400.) example, is from 0*001 to 0*002 mm. broad and long;the diameter of pollen-grains, which also consist of a singlecell, varies between o*i and 0*0075 mm.; the lignified cellsin the wood of the oak i^Quercuspedicellata) have an averagelength of about 0*7 mm., and those in the trunk of the silverfir, Abiespedinata, one of from 2 to 3 mm. There are, how-ever, cells of a considerably larger size, es-stock-foto
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Candida utilis SCP producer Produces single-cell protein for animal feed and human consumption.-stock-foto
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Rare and remarkable animals of Scotland, represented from living subjects: with practical observations on their nature . ^v ^ V. AVICULARIUM. 245 These movements are sometimes so lively, that notwithstanding theexcessive minuteness of the Avicularia, the agitation of several at once,proves very inconvenient for microscopical observation. Though nume-rous on a specimen, not above one individual has been seen on any singlecell. In itself it is semitransparent. Farther than already described, nosubordinate parts have been detected. Whether they exist, must be in-ferred from future discovery of i-stock-foto
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The problem of age, growth, and death; a study of cytomorphosis, based on lectures at the Lowell Institute, March 1907 . yncytium.Of this I offer you an illustration in the second pictureupon the screen (Fig. 8), which represents the em-bryonic connective tissue of man. In this you cansee the prolongations of the protoplasm of a singlecell body uniting with the similar prolongations fromother cell bodies, the cells themselves thus forming,as it were, a continuous network with broad meshesbetween the connecting threads of protoplasm. Thespaces or meshes are, however, not entirely vacant,but con-stock-foto
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. Der Organismus der Infusionsthiere. Infusoria; Ciliata; Flagellata. ::.:. 'i. ot ^>JR". Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Stein, Friedrich, 1818-1885. Leipzig, W. Engelmann-stock-foto
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. Elementary principles of agriculture; a text book for the common schools. 8 Elementary Principles of Agriculture yeast, except that their sides are flattened by pressingagainst each other. New cells are formed by a singlecell dividing into two cells (Fig. 6). These new cellsgrow to a certain size and divide again, and so on tillgreat numbers are formed. (See Fig. 14, C.) 14. The LivingSubstance of Cells.The cell is the unitout of which all plantand animal bodies aremade, just as thebrick is the unit outof which buildings aremade. Within each cell-wall is the living substance,called protoplas-stock-foto
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. Elektrophysiologie . Fig. 99. Galvanotropismus von Paramaecium a u r e 1 i a, (Nach Verworn.)-stock-foto
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. Practical physics. the third, etc., the copper of the first and thezinc of the last being joined to the ends of the external resist-ance (see Fig. 287). The E.M.F. of such a combination is thesum of the E.^NI.F.s of the single cells.The internal resistance of the combina-tion is also the sum of the internal resist-ances of the single cells. Hence, if theexternal resistances are very small, thecurrent furnished by the combination willbe no larger than that furnished by a singlecell, since the total resistance of the circuithas been increased in the same ratio as thetotal E.M.F. But if the ext-stock-foto
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Organic and functional nervous diseases; a text-book of neurology . uscle fibres, surrounded by the sarcolemma, are really madeup of filjrils of very fine structure, each fibril originating from a singlecell, and the fibrils are separated from one another by a structuretermed the sarcoplasma; hence, under the microscope a muscle fibrehas a double striation, a transverse striation, and the longitudinalfibrillar structure. These fibres are gathered into greater or lesser 20 ^ See Gowers, Abiotrophy, London, 1903, 306 MUSCULAR DYSTROPHIES. bundles, forming the muscle, and they are supplied by ner-stock-foto
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General physiology; an outline of the science of life . erpart to these pheno-mena of the ingestion of sub-stance on the part of thenucleus. Here certain relationsexist toward the substancesproduced, which are whollyanalogous to those existing inova toward ingested substances.In the eggs of certain water-bugs, Nepa and Ranatra, thereoccur peculiar chitinous ap-pendages, the so-called egg-rays, which are formed by cellsespecially differentiated for thispurpose. These cells, of whicheach two unite into a singlecell with two nuclei, termedby Korschelt a double cell,assume a considerable size and-stock-foto
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. The history of creation; or, The development of the earth and its inhabitants by the action of natural causes. A popular exposition of the doctrine of evolution in general, and of that of Darwin, Goethe, and Lamarck in particular. gas). The freely floating Sargasso Alga(Sargasso bacciferum), which forms the meadows or forestsof the Sargasso Sea, also belongs to this class. Although each individual of these large alga-trees iscomposed of many millions of cells, yet at the beginningof its existence it consists, like all higher plants, of a singlecell—a simple egg. This egg—for example, in the-stock-foto
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. Practical physics. tead of tlie singlecell. If, however, the plates A and B are three or four inches in diameter,,and if tlieir surfaces are very flat, a single cell is .sufficient. Hans Christian Oersted ? /I mSM WL (1777-1851) 9 ^^ The discoverer of the connection between electricity and niagnetlsui ^R A jji was a Dane and a professor at the *^m ;|^^ University of Copenhagen. His •^^L. ^-^K^Ki famous experiment made in 1S20 niMHIlltfiHHi stimulated the researches whichled to the modern industrial devel- HI opments of electricity Joseph Henry (1797-1878) Born in Albany, Kew York ; taught 1-stock-foto