Transmission Electron Micrographs. Cellen en weefsels van mensen, dieren en planten. Grotere elektronenmicrografieën (50000 tot 100000 x) tonen de ultrastructuren van de celorganillen. Foto's van lagere vergroting (5000 tot 30000 x) geven een indruk van de microstructuur van de weefsels en organen. Atlas van 24 transparanten met 120 foto's

No. 8222 E Transmission Electron Micrographs. Atlas of 24 OHP Transparencies size 22 x 28 cm, comprising over 120 individual pictures. They are made from extremely high quality, faultless and instructive transmission electron micrographs. All micrographs are marked with letters facilitating the location and interpretation of the important or special structures. Greatly enlarged electron micrographs - magnification 50000 up to 100000 x - show the ultra-structures of the cell organelles as far as the range of macromolecules. Electron micrographs of lower magnification - 5000 up to 30000 x - give an impression of the microstructure of the tissues and organs, their specific performance and functions. The resolution capability of a modern electron microscope is approximately 1000 times greater than that of the optical microscope. In strong plastic file with ring-mechanism. - Compilation: Dr. Heinz Streble. Electron Micrographs of Animal Cells and Tissues. - Techniques: production of ultra-thin sections for electron microscopy - Electron microscope: composition and function, refraction and lenses - Liver cell: distinctive marks of fine structure; nucleus, mitochondria, cytosomes, lysosomes, dictyosomes, glycogen, gall capillaries - Liver cell: fine structure of an animal cell - Liver cell: details of cell organelles and endoplasmatic reticulum - Skin: desmosomes, tonofilaments, microvilli and fissures for lymph - Ciliated epithelium of trachea: t.s. and l.s. of cilia - Cilia, flagella and their structures: t.s. of a group of cilia; three cilia are constructed divergently - Secretory cells: exocrine cells of pancreas, endoplasmatic reticulum and dictyosomes as origin-structures of digestion enzymes - Ribosomes: fixed on membranes or free floating in cytoplasm the ribosomes form designs - Resorption: simple columnar epithelium of intestine showing microvilli - Resorption: cells of proximal tubule of kidney; the highly active cells with numerous long microvilli - Glomerulus of kidney, details: capillary loops and podocytes; the barrier between blood and primary urine - Lung: epithelial layer of pneumocytes, basement membrane capillary epithelium and erythrocytes - Collagenous connective tissue: fibroblasts and collagen fibrils - Cartilage: cartilage cells in matrix - Bone, osteocytes: long cytoplasmatic processes, collagen fibrils and mineralized matrix - Smooth muscle: elongated units showing two kinds of filaments - Skeletal muscle, striated: plasma membrane, sarcoplasm, myofibrils, T-tubules, segments and bands, actin and myosin filaments - Cardiac muscle, striated: segmentation and bands, mitochondria, intercalated discs - Nervous tissue: t.s. of myelinated axons and non-myelated axons within grooves of Schwann’s cells - Nervous tissue: l.s. of axon, neurofilaments, microtubules, vesicles, mitochondria, Schwann’s cell with node of Ranvier - Neuro-muscular synapses in skeletal muscle - Blood: mature erythrocytes including homogeneous mass of hemoglobin, and erythroblast with large nucleus and polyribosomes - Blood: granular leukocytes, eosinophils: lobulated nucleus and disc-shaped cytoplasmatic granules - Olfactory epithelium: sensory cells with cilia, mucous cells with microvilli - Retina: rod cells in longitudinal view - Ovary: details of ovum, zona pellucida and follicular epithelium. - Testicles; spermatogenic epithelium: in longitudinal view an early spermatid and an matured spermatozoon – Electron Micrographs of Plant Cells and Tissues. - Typical plant cells: electron micrograph of low magnification with nucleus, cell walls, vacuoles, mitochondria, dictyosomes, endoplasmatic reticulum, plasmodesma and chloroplasts - Meristematic plant cell: representation of the membrane systems - Plant cell: three dimensional reconstruction - Meristematic plant cell: fine structures of organelles - Cell of root tip: very high magnified cut-out - Plasmodesmata: highly magnified - Mitosis in early telophase stage: cell plate formation and phragmoplast - Mesophyll cell: cell walls, large vacuole, chloroplasts, grana of plastids, starch and nucleotides - Mesophyll cell: chloroplast showing starch, grana and thylakoids - Mesophyll cell: chloroplast; highly magnified cut-out with details in grana, thylakoids, and ribosomes in stroma - Cuticle: epidermal cuticle of petiole, cutin layer with residual wax - Leaf stoma: section cut parallel to surface of a leaf, with two guard cells and two subsidiary cells - Gland cells: section through a leaf of privet showing gland cells and a stalk cell - Root: central cylinder, t.c. showing Casparian strips, endodermis, cortex, gas spaces, pericycle, sieve tubes and tracheids - Root: highly magnified section through a Casparian strip - Primary xylem: l.s. through a primitive xylem element with ring-shaped thickenings - Vascular cambium: t.s. through cambium of a woody stem; low magnification - Vascular cambium, detail: cambial initial cells showing large vacuoles, phragmoplast, proplastids - Primary phloem: l.s. showing living companion cells and almost dead sieve elements with a sieve plate - Fibers: t.s. of fibers with thick layering in the walls - Secondary xylem: Ray cells in longitudinal view and tracheids with pits in t.s. - Bordered pit: high magnified section; middle lamella, torus, membrane of pit, layers of the wall - Pit membrane and torus: shadowed by subliming metal - Collenchyma: cell with thickened corners; intercellular spaces filled with pectins - Stone cell: section with plasmodesmata, primary and secondary cell walls - Raphid cell: cell with innumerable vesicles in cytoplasm, raphidosomes and crystals of calcium oxalate - Sporogenous cells of anther: nuclei of cells with meiotic chromosomes in t.s. and l.s.; synaptic association of homologous chromosomes - Pollen grain: section of a pollen grain showing exine, intine, pollen grain pore, vegetative nucleus and sperm nucleus

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CYTOLOGY, EMBRYOLOGY AND GENETICS