M køie (8 Ergebnisse)

The body wall of the daughter sporocyst of Cercaria buccini has been examined by means of the light microscope, scanning and transmission electron microscopes, and the effect on the host, the carnivorous prosobranch Buccinum undatum, has been described both at the light microscopical and ultrastructural levels. The sporocyst is provided with long microvilli. Large extrusions distended by a large vesicle and with pores through which the contents of the vesicle can be released into the host tissue are found between the microvilli. The stereoscan micrographs revealed about 5 µ long cilia scattered all over the sporocyst surface; each cilium is apparently a part of a sensory structure. The tegument contains high concentrations of acid and alkaline phosphatases and small concentrations of non-specific esterase and aminopeptidase. The host tissue surrounding the sporocyst was always found in an advanced stage of histolysis. The extracorporeally digested host tissue must be absorbed through the sporocyst wall and subsequently be used by the developing cercariae. 19 pp., 13 figs, br. gr. 8.…

Whole miracidia of Schistosoma mansoni, miracidia vibrated in an ultrasonic cleaner, and the miracidium-sporocyst transition were studied in the steroscan electron microscope. After vibrating, the cilia broke off near the bases and the epidermal cella, intercellular ridge and sensory structures were revealed. The apical papilla had a folded surface with penetrating sensory cilia. The number of epidermal cells varied between 17 and 22. The lateral papillae appeared as bulbous projections on either side between the first and second tiers of epidermal cells. There was a ciliated pit nerve ending close to each lateral papilla. A few ciliated pits were found between the cells in the first tier, and up to twelve ciliated pits with long cilia could be found between the second and third tiers. Miracidia placed in haemolymph from Planorbarius corneus cast off the apical ciliated part of the epithelial cells, and large scars appeared where the ciliated plates had been. Later, the syncytial intercellular ridge dispersed throughout the surface of the mother sporocyst, and small cytoplasmic knobs appeared on the surface. The apical papilla and the lateral papillae were still observed a few hours after shedding the ciliated plates, but the ciliated pits disappeared shortly after the ciliated plates were lost. 10 pp., 12 figs, gr. 8.…

The egg of Fasciola hepatica has a smooth surface with a slightly elevated circle marking the fracture of the operculum. The operculum and the aperture have crenated edges. The epithelial cells of the miracidium are covered with long cilia. When miracidia are vibrated in an ultrasonic cleaner the cilia of the epithelial cells of the four posterior tiers are broken off only leaving longitudinal rows of cilium stubs, whereas the cilia of the first tier are still retained. The apical papilla is provided with a dorso-ventral furrow, multiciliated pits and isolated sensory cilia. The narrow intercellular ridge is smooth, whereas the epithelial cells have small cytoplasmic knobs between the cilia. The penetration into the snail (Lymnaea truncatula) and the transformation into sporocyst may be separated into three phases. (1) Less than 1 min after attachment to the snail the ciliated cells of the anterior tier are shed and swim away. (2) The cilia of the remaining cells beat violently and after about 5 min most cilia are broken off near the cell surface. The miracidium remains for about 15 min embedded as far as the intercellular ridge receptors (lateral papillae and sheathed ciliated nerve endings). During this period extensive contraction and relaxation of the body are performed. (3) The final penetration of the snail epithelium takes about 15 min. Simultaneously with the penetration into the snail tissue the "bald" cells (epithelial cells with cilium stubs only) of the four posterior tiers loosen, form globules and fall off. The surface below the cells is smooth and in cytoplasmic continuity with the intercellular ridge and the apical papilla, and this syncytium forms the later tegument of the sporocyst. After a few days the tegument of the sporocyst is provided with microvillus-like projections and the apical papilla and sensory structures are lost. 12 pp., 26 figs, gr. 8.…

24 pp., 11 figs, gr. 8.

orig. wrappers. Zustand: Minor rubbing, VG. 27x21cm, 267 pages., Series: Det Kongelige Danske Videnskabernes Selskab, Biologiske Skrifter, Bd. 14, Nr. 4. Full title reads: "Symbolae Afghanicae: Enumeration & Descriptions of the Plants Collected by L. Edelberg and M. Koie on "The 3rd Danish Expedition to Central Asia" and by G. Kerstan, W. Koelz, H.F. Neubauer, O.H. Volk and Others in Afghanistan, [Volume] V.". Contents: H. Riedl "Ephedraceae"; A. Patzak "Zygophyllaceae"; H. Schiman-Czeika "Tamaricaceae"; "Elaeagnaceae"; K.H. Rechinger & H. Riedl "Umbelliferae"; K.H. Rechinger & M. Koie " Plumbaginaceae"; H. Riedl "Borraginaceae"; A: Patzak "Verbenaceae"; A. Gilli "Orobanchaceae"; A. Patzak "Plantaginaceae"; A: Patzak " Valerianaceae"; H. Riedl "Araceae". Textual photo/drawing illus. (illustrator).…

Kopenhagen, Det Kongelige Danske Videnskabernes Selskab (Ejnar Munksgaard), 1954-1965. Large 8vo (26.0 x 20.5 cm). 1,050 pp.; hundreds of text illustrations. Original uniform printed wrappers. = An important contribution to the flora of Afghanistan. Published in the academy's Biologiske Skrifter. This is all that was published, but it is unclear if the series was terminated rather than completed. As far as we know there is no general index. Some wear to wrapper spine ends and other, mostly minimal shelf wear, but generally in very good condition, clean, without library markings. …

85, [1] p., 9 figs, 2 pls, 4to, paperbound.

Enumeration and description of the Plants collected by L. Edelberg and M. Køie on "The 3dr Danish Expedition to Central Asia" and by W. Koelz, H.F. Neubeuer, O.H. volk and others in Afghanistan. 6 volumes. Det Kongelige Danske Videnskabernes Selskab, I kommission hos Munksgaard, København 1954-1965. 4to. Illustrated in b/w. Original soft covers. Pages unopened. Covers unevenly browned and with light edgewear, including small nicks and tears. Owner's stamp to front covers. upper edges foxed. Good+. * In the series Biologiske Skrifter udgivet af Det Kongelige danske Videnskabernes Selskab. Vol. 8 nr. 1 + nr. 2; vol. 9 nr. 3; vol. 10 nr. 3; vol. 13 nr. 4 and vol 14, no. 4. …