Isolation and description of a new species of Eimeria in rabbits (Orychtolagus cuniculus) : Eimeria pellerdyi P. Coudert, 1977 (Sporozoa, Coccidia)]

Several pure isolates of Coccidia have been obtained in coccidia-free Rabbits by methods taking advantage of differences in the duration of their life-cycle and their site of development, as well as by the inoculation of experimentally immunized animals. Among these isolates one has been shown to represent a new species for which we propose the name: Eimeria pellerdyi P. Coudert, 1977. The oocysts of this species are of medium size (21 x 30 mu), without oocystic residual body. The endogenous life-cycle is completed in 10 days. Schizogony takes place in the superficial epithelial cells of the caecum and the colon, and gamogony in the depth of the Lieberkühn's crypts of the same organs. E. perllerdyi seems to be one of the most pathogenic coccidia species in Rabbits.     

Die Struktur der Cadmiumhydroxyhalogenide CdCl0,67(OH)1,33, CdBr0,6(OH)1,4, CdJ0,5(OH)1,5

Summary The crystal structure of CdCl_0,67(OH)_1,33, CdBr_0,6(OH)_1,4 and CdJ_0,5(OH)_1,5 is determined, the first crystalizes in the C-19-, the latter in the C-6-type. The dimensions of the lattice of the named compounds and of CdCl_0,67(OH)_1,33 are tabulated together with those of Cd(OH)₂ and of the halogenides. It follows that when in Cd(OH)₂ OH-ions are substituted by halogen-ions, the distancea of the Cd-ions in the layers are changed very little, while the distance of the layersc is increased according to the size of the halogen-ion.     

Die Augenstielbewegungen der Languste (Palinurus vulgaris)

Summary Palinurus vulgaris shows clear compensatory eye stalk movements when turning actively around a vertical axis. Exactly the same eye stalk movements are observed after blinding of the animal (measurement of film pictures). On passive rotation only the intact animal shows compensatory eye stalk movements (= optomotoric reactions); in the blinded lobster such movements are lacking, except when a torsion of the body with respect to the legs is effectuated (stimulation of proprioceptors). It is suggested that the compensatory eye stalk movements of the actively turningPalinurus are no optomotoric reactions, and possibly no sensory reactions at all; but that they are spontaneous acts originating primarily within the central nervous system.     

Die Rudimentation des Rumpfkanals bei kavernikolen Populationen des Astyanax (Characidae,Pisces)

Summary The lateral canal of the eye- and pigment-reduced cave populations of Astyanax mexicanus shows fragmentations. This is in contrast with the epigean ancestor and is attributed to the loss of its biological function.

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Die Rudimentation des Rumpfkanals bei kavernikolen Populationen des Astyanax (Characidae, Pisces)

     

Die Carbohydrasen der SpinnmilbeTetranychus urticae Koch (Acari,Tromb{ie307-1}diformes,Tetranychidae)diformes,Tetranychidae)

Summary In preparations of crushed whole spider mites (Tetranychus urticae Koch), the enzymes capable of hydrolyzing carbohydrates were identified. The products of the enzymic hydrolysis were detected by paper chromatography. The following substrates were hydrolyzed: Starch, maltose, sucrose, trehalose, melibiose, lactose, melezitose and raffinose. Not attacked were: Cellobiose, cellulose, pectin and pectic acid. In the homogenates there must be present an amylase, an -glucosidase, a -h-fructosidase, an - and -galactosidase. There is no indication for the presence of a -glucosidase, a cellulase, a pectinase and polygalacturonase.     

Die zentralnervöse Rangstufe des Blauwals (Sibbaldus musculus Linnaeus)

Summary Macroscopic anatomical investigations on the brain of the Blue Whale (Sibbaldus musculus Linnaeus, total brain weight without dura: 6500 g), show that this species of cetacea has a degree of cerebralization between that of the primitive Southern Right Whale (Eubalaena australis Desmoulins) and that of the Humpback Whale (Megaptera novaeangliae Borowski). Of the Balaenopteridae examined to date, the Blue Whale has the lowest cerebralization.

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Durchgeführt mit Unterstützung des Schweizerischen Nationalfonds zur Förderung der wissenschaftlichen Forschung (Gesuch Nr. 3883/1966).     

Die Entwicklung der Galois-Theorie zwischen Arithmetik und Topologie (1850 bis 1960)

Zusammenfassung Der vorliegende Aufsatz verfolgt das Ziel, die Entwicklung der Galois-Theorie etwa von 1850 bis 1960 zu skizzieren. Hervorgehoben werden dabei diejenigen Entwicklungslinien, die mit der Funktionentheorie, der algebraischen Topologie und der Verallgemeinerung des Separabilitäts-Begriffs verknüpft sind. Es wird ein Ausblick auf die Galois-Theorie der kommutativen Ringe (nach M. Auslander & O. Goldman) und der Schemata (nach A. Grothendieck) gegeben.     

Die Wirkung von synthetischem Oxytocin (Syntocinon) und Acetazolamid auf die Ausscheidung von Wasser,Natrium und Kalium

Summary Changes in water, sodium, and potassium excretion following administration of synthetic oxytocin (Syntocinon)—alone or in combination with acetazolamide— resemble the changes that occur after an equivalent dose of neurohypophysial extract containing oxytocin. Since the action of Syntocinon on water and sodium excretion is manifest when carbonic anhydrase in kidney tissue is fully inhibited by acetazolamide, it may be assumed that the mechanism whereby Syntocinon increases sodium excretion is independent of carbonic anhydrase. Oxytocin does not affect ultrafiltration in the glomeruli (Krause ⁴) and would therefore appear to modify the reabsorption or excretion process in the tubuli.     

Die Probeentnahme in kinetischen Stoffwechseluntersuchungen mit WasserlinsenLemna minor L. (Lemnaceen)

Summary A suitable sample technique for duckweed (Lemnaceae) in kinetic studies of photosynthesis or other metabolic processes is described. It enables one to remove plants from a culture chamber in a closed gas and/or nutrient solution circuit without disturbing the system.     

Die Bedeutung des Serumeiweissbildes zur Diagnose vonBufo calamita Laur.,Bufo viridis Laur. und deren Bastarden (Amphibia,Anura, Bufonidae)

Summary Electrophoretic investigations of the serum protein patterns of natterjacks (Bufo calamita Laur.) from the Iberian Peninsula and from Western and Central Europe, and of green toads (Bufo viridis Laur.) from Central Europa, Asia Minor and North Africa show that the two species differ disctinctly in the position of their albumin fractions. The identification of problematic specimens can result from the production of mixed serum with specimens of both species. As the albumin fraction of hybrids is doubled according to this method, it is also suitable for demonstrating the existence of such hybrids in natural populations.     

Die Veränderungen der Succinodehydrase-Aktivität in Detroit-6 (VA) Zellen,infolge der Infektion mit demHepatitis-infectiosa-Virus

Summary The inhibitory action ofHepatitis infectiosa virus on the SDH activity of Detroit-6 (VA) cell lines was investigated. The full inhibition of the SDH activity took place at the end of the third day after the infection. As this phenomenon precedes the cytopathogenetic effect of viral infection, it may be of some help in the early detection of the infection.     

Die licht- und sublichtmikroskopische Morphologie der Epidermis des neotenen Axolotls (Siredon mexicanum Shaw)

Summary Three different cell types are the most frequent elements of the epidermis of the neotenic axolotl: (1) the common epidermal cells are small and multiform. They show bundles of tonofilaments (figures ofEberth) in the stratum basale. (2) The big Leydig cells contain numerous gross granules and a special network in the peripheral cytoplasm (Langerhans net). (3) The cover cells forming the outer layer of the epidermis possess a striking mucin zone in the apical cytoplasm.     

Supernumerary (B) chromosome inAnopheles indefinitus (Diptera,Culicidae)

Summary Larval brain mitotic karyotype ofAn. indefinitus from Kanchanaburi exhibits a supernumerary (B) chromosome which is apparently common in that population. 1 or 2 B-chromosomes have been observed in the samples from 5 isofemale lines examined.Acknowledgments. We thank K. Mongkolpanya and P. Kittayarak for species identification. Part of this work was supported by Mahidol University Research Fund and AFRIMS.     

Die Veränderung des Stärke-, Protein- und RNS-Gehaltes vonLemna minor L. unter dem Einfluss von Kinetin (6-Furfurylaminopurin)

Summary Kinetin (6-furfurylaminopurine) is rapidly absorbed byLemna minor L. 3 · 10^–8 M/ml medium cause an immediate but temporary stimulation of RNA and protein synthesis during the first hour of the treatment. The following excessive accumulation of starch is considered to be more or less a direct consequence of a disturbed RNA and protein metabolism.     

Die bakteriostatische Wirkung von Chalkon,Flavanon, Flavon und Flavonol

Summary Chalcone, flavanone, flavone, and its derivatives had a certain bacteriostatic effect onSt. aureus. Flavonol has no activity and morin, a derivative of flavonol, showed only a weak inhibition of the bacterial growth.Cystein did not have any antagonistic effect.Extracts of drugs, which contain natural flavanones, flavones, isoflavones and flavonols, are more or less bacteriostatic.