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Transmission Electron Micrographs Overheads  
Cat #: JL-25ST
Transmission Electron Micrographs Overheads

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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: Technics: 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 in stratum spinosum cells of epidermis - 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, basal invaginations and mitochondria - 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 matrix bundles of banded collagen fibrils - Cartilage: cartilage cells in matrix of cartilage - Bone, osteocytes: long cytoplasmatic processes, collagen fibrils and mineralised 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: the junction shows vesicles in presynaptic component and junctional folds that reach the myofibrils in postsynaptic component - Blood: mature erythrocytes including homogeneous mass of haemoglobin, 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 w. microvilli - Retina: rod cells in longitudinal view; the outer segment and banded rootlet of each cell is a highly specialized cilium - 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; high magnified - Cell of root tip: very high magnified cut-out showing cell wall, plasma membrane, clusters of ribosomes and microtubules - Plasmodesmata: high magnified electron micrograph showing details - Cytokinesis and mitosis in early telophase stage: cell plate formation and phragmoplast - Mesophyll cell: cell walls, large vacuole, chloroplasts, grana of plastids, starch and nucleotids - 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 on the surface and primary cell wall - Leaf stoma: section cut parallel to surface of a leaf, with two guard cells and two subsidiary cells - Leaf stoma: transverse sections through stoma cells - Gland cells: section through a gland from leaf of privet showing gland cells and a stalk cell - Root: central cylinder, transverse section showing Casparian strips, endodermis, cortex, gas spaces, pericycle, sieve tubes and tracheids - Root: high magnified section through a Casparian strip - Primary xylem: longitudinal section through a primitive xylem element with secondary, ring-shaped thickenings of the wall - 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 - Fibres: t.s. of fibres with thick layering in the walls - Secondary xylem: Ray cells in longitudinal view and tracheids with bordered pits and half bordered pits in t.s. - Bordered pit: high magnified section; middle lamella, torus, membrane of pit, layers of the wall - Pit membrane and torus: surface relief of torus and microfibrils of cellulose; plastic replica shadowed by subliming metal - Collenchyma: cell of angular collenchyma with thickened corners; intercellular spaces filled with pectins - Stone cell: section with plasmodesmata, primary and secondary cell walls, nucleus, plastids, mitochondria, and endoplasmatic reticulum - 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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