Részletes keresés
Keresés

Aktuális sajtó tartalmak és illusztrációs fotók

[structureless] képek

234 találat
  • / 6
  • kép/oldal:
RF
Single wooden figure positioned at the center of a perfectly balanced seesaw. Concept representing stability, equilibrium, strategic positioning and c-stock-foto
RF
Seamless repeating hexagonal grid with connected outline shapes.-stock-foto
RF
High-detail abstract illustration featuring structured chaos, dynamic geometric forms, and random complexity. Ideal for modern design, technology conc-stock-foto
RM
New York, USA. 03rd Apr, 2023. Summit One Vanderbilt. Credit: nidpor/Alamy Live News-stock-foto
RM
New York, USA. 03rd Apr, 2023. Summit One Vanderbilt. Credit: nidpor/Alamy Live News-stock-foto
RF
Milwaukee Art Museum.-stock-foto
RF
Vertical close up of a colourful lava lamp.-stock-foto
RM
. The book of the dairy : a manual of the science and practice of dairy work. Dairying. THE UDDER. length of about 12 to -20 millimetre ("0047 to'0078 inch) and a breadth of "09 to'll millimetre ('OOSo to '0043 inch). According to Heidenhain, the delicate tissue which sur- rounds the alveoli consists of a structureless membrane, the so- called tunica jpropria, to the inside of which is attached cel- lular tissue. The internal surface of this net-work of cells is further lined with a continuous single layer of epithelial cells (fig. 6). The diameter of these cells, on an average, is a-stock-foto
RM
. Biology and its makers. Biology -- History. FIG. 76.—The Egg and Early Stages in its Development. (After Gegenbaur.) which they are separated by a lifeless matrix, the latter being the product of cellular activity. Fig. 77 shows a stage in the development of one of the mollusks just as the differentiation of cells has commenced. The Nucleus.--To the earlier observers the protoplasm appeared to be a structureless, jelly-like mass containing granules and vacuolcs; but closer acquaintance with it has shown that it is in reality very complex in structure as well as in chemical composition. It is-stock-foto
RM
. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. 3i6 DIVISION II.âCOURSE OF DEVELOPMENT OF FUNGI. falls away (Vittadini). In some, perhaps in most species, as for instance in Bovista plumbea and Lycopcrdon perlatum, according to Tulasne and Vittadini, the dis- organisation affects the whole of the outer peridium and it becomes changed into a slimy mass, which turns as it dries into a brittle and almost structureless mem- brane. The structure of the peridium is more complicated in Geaster. G. hygrometricus is up to the perio-stock-foto
RM
. Johnson's new universal cyclopaedia : a scientific and popular treasury of useful knowledge. and in which the capillaries derived from the pulmonaryarteries form a close j)lexus with rounded or oval meshes.They are lined at birth by a layer of flat granular, nucle-ated hexagonal epithelial cells, which form a continuouslining for both the air-vesicles and the alveolar passages.In the adult only a part of the cells retain these characters,the rest being transformed into thin structureless plates.This epithelium, the existence of which has been a matterof dispute until quite recently, is best-stock-foto
RM
. The elements of pathological histology with special reference to practical methods . Fig. 32.—Spindle-Celled Sarcoma ok the Skin of the Abdomen, x 240. (Stainedwith alum cochineal.) a, Bundle of spindle cells, seen longitudinally; b, Bundle ofspindle cells, seen transversely ; c, Sarcomatous tissue merging into the cutis; cellulargrowth in the latter ; d, Epidermis. but inside of which the cells themselves run parallel to one another(Fig. 32, a and h). The interstitial substance in spindle-celledsarcomata is extremely scanty and structureless, and in sections oftencannot be seen at all. When-stock-foto
RM
A text-book of physiology for medical students and physicians . s, and these differences in some cases are not associated withvisible variations in structure. 2 17 18 THE PHYSIOLOGY OF MUSCLE AND NERVE. The Structure of Skeletal Muscle.—This tissue makes up theessential part of the skeletal muscles by means of which ourvoluntary movements are effected. Each muscle fiber arisesfrom a single cell and in its fully developed condition may beregarded as a multinuclear giant cell. It is inclosed entirely ina thin, structureless, elastic membrane, the sarcolemma. Thematerial of the fiber is supposed-stock-foto
RM
. A treatise on rocks, rock-weathering and soils;. Petrology; Soils. 292 THE EEGOLITH made by Messrs. Chamberlin and Salisbury: *^Above, the clay graduates into soil which, outside the valleys, is uniformly shallow. Beneath the soil, the clay loses the dark color of the latter, due to the presence of organic matter, but is for a certain distance downward not unlike the superior portion in texture. The deeper lying clay, where limestone is the subjacent rock, is the most characteristic member of the residuary earth series. It is not like that above, structureless, although, like that, it is wit-stock-foto
RM
. Bulletin - United States National Museum. Science. THE FAMILIES AND GENERA OK BATS. 259 Genus PROMOPS Gervais. 1855. f'rniiioii.s (Jkhvais Kxim'hI. dii ('oiiito ilc (';isl('ln:in, Zodl. Maiuiii.. p. 58. 1878. I'l-oiiKipx DoiisoN. I'atal. Cliirdiit. 15rit. .Mus., p. |(i7 (part). Suligeinis of Mnlossils. Type-f-ht of canine), the anterior upper premolar is re- duced to a mere structureless, often decidnons. s])icule, the lower premolars are a'l't'atly crowded, their width notice- ably exceeding' their lep.o-th, and the upper molars lack all distinct trace of hyj^ocones. Skull (fig-. 48) dirt'e-stock-foto
RM
. Bulletin of the British Museum (Natural History), Geology. ORDOVICIAN-SILURIAN JUNCTIONS IN S.W. SCOTLAND 49 sedimentary structures, palaeoenvironmental analysis of the High Mains Formation is equivo- cal. Nevertheless the thickness, geometry and lithology of the unit are compatible with deposi- tion within channels which developed on the deeper parts of the shelf and the upper parts of the slope. Such environments (Dott & Bird 1979) may be characterized by apparently massive and structureless sandstones comprising channel fills in the order of 25 m thick. Elsewhere, various modes of cha-stock-foto
RM
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. no bulletin: museum of comparative zoology. a small valley there was exposed in 1908 in the road the section diagrammatically shown in Fig. 32. A quartz vein about 2 inches (5 cm.) thick dipping E. 30° in a section of decomposed schists had given rise to a sheet of quartz fragments at the base of the residual structureless surface deposits. Fig. 32.— Train of residual quartz fragments derived from a vein during the weathering and ablation of the crystalline schists. Near Curityba, Parand. a-b, a distance of 5-stock-foto
RM
. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. THE EYE. 421 and nucleated (Iwanoff and Vircliow); according to tlie former observer the cells have contractile powers. The hyaloid membrane is described as structureless by Schwalbe, as fibrous by Pappenheim^ Bowman, and Fuikbeiner. The vessels o£ the vitreous body (Fig*. 260) are as follows. The A. Iiyaloldea arises at the lowest point of the corpus ciliare ; it almost immediately divides into two branches, which form a ring" at a distance of about 0*5 mm. from the lens and lying- on the surface of the vitreous body (Fi-stock-foto
RM
. The crayfish : an introduction to the study of zoology . Crayfish. 132 THE PHYSIOLOGY OF THE COMMON CRAYFISH. nucleated cells, separated from the cavity of the organ by a delicate structureless membrane. The growth of these cells gives rise to papillary elevations which project into the cavity of the ovary, and eventually become globular. 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.. Huxley, Thomas Henry, 1825-1895. Lon-stock-foto
RM
. The microscope and its revelations. slight grey colour, due proliaUv i The Depths of the Sea, y. no. s(.<- also //,if/r ,,i choUnnjo-, di. iii., andger Reports, e&peci&Ui Deep Sea Deposes (Murraj and MINUTE ORGANISMS AS ROCK-MAKERS I08; to the decomposing organic matter, becomes more pronounced, whileperfect shells of Globigerina almost disappear, fragments becomesmaller, and calcareous mud, structureless, and in a fine state ofdivision, is in greatly preponderating proportion. One can have nodoubt, on examining this sediment, that it is formed in the main bythe accumulation and disintegr-stock-foto
RF
A high-contrast black and white image of a textured brick wall with undulating lines that create an abstract pattern-stock-foto
RM
. Compendium of histology. Histology. THE LUNGS. 159 thoracic cavity compels the pulmonary alveoli to maintain a certain expansion permanently. In consequence of their great distensibility, the lungs follow the expansion of the thorax. By means of their elastic power, and assisted by the muscles of their canals, they contract at each expiration,. Fig. 147.—Transverse section through the pulmonary substance of a child of nine months. A number of pulmonary cells, b, surrounded by the elastic fibrous net-work, which bound them in a trabecula-like manner, and, with the thin structureless membrane,-stock-foto
RM
Elements of animal physiology, chiefly human . Fig. 34. Striated (Voluntary) Muscular Tissue. The two tipper figure* devoid of Sarcolemma. transparent, structureless membrane, termed the sar-colemma or myolemma. Each primitive fibre may be split up longitudinallyinto fihrillce^ and transversely into minute discs, asshown in the diagram. (See figs. 33 and 34.) The primitive fibre itself contains neither blood-vessels nor connective tissue, but occasionally nucleimay be seen within its substance. The sarcous element,contained within the sarcolemma^ consists of syntonin.The peculiar effect of the-stock-foto
RM
. Bulletin - United States National Museum. Science. 256 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. In thin sections the amalgamated cell walls and the very large acanthopores composed of a clear, almost structureless tissue are the most noteworthy features of the more minute details. Wherever an acanthopore occurs the walls are greatly thickened, but they are quite tliin in the intervening spaces. This alternate thickening and thin-. FiG. 148.—Orbipora souda. a, side vte-w, natural size, of the solid, massive type-specimen; 6, TANGENTIAL SECTION, X20, SHOWING ZOCECIAL STRUCTURE; C, VERTICAL-stock-foto
RM
. Electric railway journal . oof whileat the same time it is being covered with increasingthicknesses of newer cells. As time goes on, therefore,these cells become less and less subject to decay, otherthings being equal, their walls resisting the action ofsuch hyphse as may extend to them while the layers ofcells outside help keep the hyphse out. Under favorableconditions, however, the hyphse force their way betweenthe cells, and feeding first upon the sugars, starches andoils in the cells, presently attack and break down the cellwalls, converting them into a structureless mass with nostrength-stock-foto
RM
. Biology and its makers. Biology -- History. Fig. 76.—The Egg and Early Stages in its Development. (After Gegenbaur.) which they are separated by a lifeless matrix, the latter being the product of cellular activity. Fig. 77 shows a stage in the development of one of the mollusks just as the differentiation of cells has commenced. The Nucleus.—To the earlier observers the protoplasm appeared to be a structureless, jelly-like mass containing granules and vacuoles; but closer acquaintance with it has shown that it is in reality very complex in structure as well as in chemical composition. It is-stock-foto
RM
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 3i6 DIVISION II.—COURSE OF DEVELOPMENT OF FUNGI. falls away (Vittadini). In some, perhaps in most species, as for instance in Bovista plumbea and Lycoperdon perlatum, according to Tulasne and Vittadini, the dis- organisation affects the whole of the outer peridium and it becomes changed into a slimy mass, which turns as it dries into a brittle and almost structureless mem- brane. The structure of the peridium is more complicated in Geaster. G. hygrometricus is up to t-stock-foto
RM
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 3i6 DIVISION II.—COURSE OF DEVELOPMENT OF FUNGI. falls away (Vittadini). In some, perhaps in most species, as for instance in Bovista plumbea and Lycoperdon perlatum, according to Tulasne and Vittadini, the dis- organisation affects the whole of the outer peridium and it becomes changed into a slimy mass, which turns as it dries into a brittle and almost structureless mem- brane. The structure of the peridium is more complicated in Geaster. G. hygrometricus is up to t-stock-foto
RM
Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . nging, the body of the caterpillar becomesshorter and thicker, and remains so for one or several days;that of the saw-fly remains in this state through the winter.During this period, called the semipupal stage, the pupadevelops, its skin separating from that of the larva. It should be borne in mind that the skin is composed of two layers; the under oneformed of cells and called thehypodermis (Fig. 37), whichsecretes the hard, chitinous,structureless outer layer orcrust. The hypodermis ofthe growing pu-stock-foto
RM
Elements of animal physiology, chiefly human . , so that little or no bloodis lost from them. 135. Adipose Tissue simply consists oi fat cells dis-tributed through the meshes of the connective tissue. Thefat cells, about -^-^ or ^ig- of an inch in diameter, con-sist of oval or globular cell-walls, formed of a fine,transparent, and structureless membrane, filled with ayellowish oily fluid. After death, when the animaltemperature falls, this oily fluid solidifies or coagulates,and becomes hard, as in the case of mutton suet. Adi-jjose tissue is more or less vascular, the cells being moreor less-stock-foto
RM
The elasmobranch fishes (1934) The elasmobranch fishes elasmobranchfish03dani Year: 1934 Fig. 128. Median view of teeth in jaws, Heterodontus francisci. (Duncan Dunning, del.) which have characteristics of both. The teeth in the sixth row from the front are flattened out and are provided with cusps essentially like the pavement teeth of Miisielus henlei. The finer structure of a tooth (fig. 129) is somewhat similar to that of a scale. In both there is an outside harder cap usually of structureless enamel (e.) over a heavier inside layer of dentine. The enamel in some teeth is of a coarse gi'a-stock-foto
RM
. A practical treatise on medical diagnosis for students and physicians . ar assolid masses of sputum; their arrangement into cylinders may not besuspected until they are agitated in water. The size of the cylindervaries from that of the little finger to that of a bodkin, but they do notoften exceed the size of a goose-quill. The larger casts may be hollow,but the smaller ones are solid, and are arranged in layers. They arewhitish or gray in color, and firm in consistence, but become softer as thedisease improves. Microscopically, the casts are nearly structureless,consisting of a fibrillated-stock-foto
RM
Quarterly journal of microscopical science . Fig. 22. Pxo. 23 OVUM-LIKE BODIES IN THE TESTIS 577 Fig. 5.—Cat. Seminiferous tubule, x 470. Stained Mallory. Thecentre of the lumen is filled by structureless protoplasm in which is seena spherical body brilliantly stained with Orange G. The peripheral cells,though showing no mitosis, are comparatively normal. Fig. 6.—Goat. Ovum-like body within a seminiferous tubule, x 470.Stained Mallory. The peripheral parts stain blue indicating commencingcalcification. The germinal epithelium is more degenerate than in fie. 7. Plate 19. Fig. 7.—Goat. Seminifer-stock-foto
RM
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 20.—Monocotyledon Fig. 21.—Amphivasal bundle rhizome. x 9. from rhizome. x 200. The epidermis is a very distinct layer. In old portions regular layers of cork occur on the outside. Scale Leaves.—In section these seem structureless. It is probable that they were dry, shrivelled scales. Near the base they are com- posed of undifferentiated parenchyma through which run a number of small parallel vascular bundles. Roots.—Eoots are produced in large numbers from the rhizomes. They are found passing t-stock-foto
RM
. Relics of primeval life [microform] : beginning of life in the dawn of geological time. Paleontology; Paléontologie. TilE DAWN OK LIFE ^^'j State, and possibly capable of living independently, and of founding new colonies. It is only by a somewhat wild poetical licence that ICozoon has been represented as a " kind of enormous composite animal stretching from the shores of La-. FlG. 4j.~S/iVe of Umesfone (maiini/ied), («) Fragment of Eozooii with canals. (lA Fra<Tm„„tc ^r „ i • . organic. (.) Structureless calcite^tiS^.'S ^^iSS^"^:^^^ '^ brador to Lake Superior, and then.e northw-stock-foto
RM
. A practical treatise on diseases of the skin, for the use of students and practioners . M>. Lower portion of hair-pouch from the lip of akitteu. F, follicle; T, transverse sections of con-nective-tissue bundles of derma ; M, arrector plli muscle ; IS, inner root-sheath ; OS, outer root-sheath ; P, papilla; C, cuticle ; R, root of hair ; H, hyaline, or so-called structureless membrane.Magnified 500 diameters. (After Heitzmann.) sac which is above the level of the papilla. That part of the sheathformerly called Huxleys layer, is the more internally situated partof the same sheath, somewhat-stock-foto
RM
A text-book of physiology, for medical students and physicians . s, and these differences in some cases are not associated withvisible variations in structure. 2 17 IS THE PHYSIOLOGY OF MUSCLE AND NERVE. The Structure of Skeletal Muscle.—This tissue makes up theessential part vi the skeletal muscles by means of which ourvoluntary movements are effected. Each muscle fiber arisesfrom a single cell and in its fully developed condition may beregarded as a multinuclear giant cell. It is inclosed entirely ina thin, structureless, elastic membrane, the sarcolemma. Thematerial of the fiber is supposed-stock-foto
RF
Bright exterior gallery with carved arches, rooftop bowls and distant view of the Hassan II Mosque minaret, Casablanca, Morocco-stock-foto
RM
. Lectures on the evolution of plants. Botany; Plants. EVOLUTION OF PLANTS rmals the so-called " Monera," which were formerly supposed to be composed of structureless protoplasm, are now known to possess a nucleus, so that we cannot assert positively that any known forms consist of un- differentiated protoplasm as was once supposed to be the case. As a rule the protoplasm is segregated in masses of definite form, usu- ally furnished with a more or less evident envelope and provided with a special structure, the nucleus. These nucleated masses of protoplasm are generally called cells,-stock-foto
RM
. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. fB^^ _0mfgm mum 14 COMPARATIVE PHYSIOLOGY. of the vacuoles found in any of the organisms thus far consid- ered. It is worthy of note that Amoeba may spontaneously assume a spherical form, secrete a structureless covering, and. Vff ne ne. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appe-stock-foto
next page