130 Result(s)
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Article
La Rigenerazione del testicolo atrofico da Fluoroacetamide
Morphological changes of atrophic testis, obtained by treating normal rats with fluoroacetamide, are studied at various times after treatment. The data show that the testicular germinal epithelium is fully reg...
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Article
I cromosomi di alcuniPipidae (Amphibia Salientia)
The karyotype of the African PipidHymenochirus boettgeri (2n=24, all meta- or submetacentric chromosomes) is different from the one of the African PipidXenopus laevis (2n=36). The karyotype of the American PipidP...
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Article
Trasmissione del tumore di Yoshida con estratti acellulari del medesimo
The authors demonstrate the transmissibility of the tumour of Yoshida by means of definitely acellular, tumoural extracts. Neoplasia occurred in 11 out of 12 new-born mice i.p. inoculated as above. It is notew...
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Article
La vitellogenesi inArbacia lixula eSphaerechinus granularis (Echin. Echin.)
The researches carried out both under the light and electron microscopes permitted us to ascertain that, in EchinodermataArbacia lixula andSphaerechinus granularis, yolk globules form by aggregation of ribonucleo...
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Article
Dati preliminari sulla presenza di zinco nel veleno cutaneo di anfibi
Mit Hilfe der Farbreaktion mit Dithizon und polarographischer Analysen wurde die Anwesenheit von Zink im Gift vonTriton cristatus, Salamandra maculosa undBombinator pachypus nachgewiesen. Die Möglichkeit einer Ch...
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Article
Ultrastruttura della calcificazione distrofica renale da sublimato
Carrying on the researches on the biological process of calcium deposition, the role of the substructures in the precipitation of calcium salts in the loci of distrophic calcification of kidney tubules followi...
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Article
Effetto della ouabaina sul tessuto nervoso in coltura in vitro
The addition of 1 · 10−4 ouabain (strophantin-G), a Na+-K+-dependent ATP-ase inhibitor, to the cultivating medium of chick embryo spinal ganglia in vitro cultures caused the vacuolization of the cytoplasm of the ...
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Article
Azione dei virus poliomielitico e Coxsackie sulle cellule renali di scimmia (Macaca mulatta shaw)
The authors found several modifications, particularly in the nucleolus, in kidney epithelial cells ofMacaca mulatta, kept in culture for 6–8 days, after infection with polio and Coxsackie viruses. They observed, ...
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Article
Atrofia del testicolo prodotta dal monofluoroacetato sodico nel ratto albino
The lesions caused by sodium monofluoroacetate on the testis of the albino rat are described. They consist of regressive modifications of the seminiferous tubules which initially cause damage to the intermedia...
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Article
Inattivazione della gramicidina dovuta alla conversione triptofano → N'-Formilchinurenina
Treatment of gramicidin with ozone in formic acid leads to a tryptophan-N'-formylkynurenine conversion. Such a conversion causes a decrease of both bacteriostatic and haemolytic activities.
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Article
Azione diabetogena dei derivati benzotiodiazinici nel gatto
Diaxoxide and chlormethiazide produced an evident hyperglycemia in cats and the two compounds together caused a much more marked effect. In cats, diaxoxide showed a specific toxicity, much higher than that in ...
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Article
Passaggio di nucleoli attraverso la membrana nucleare negli ovociti in accrescimento diPatella coerulea L. (Moll. Gast. Pros.)
The author has found in increasing ovocytes ofPatella coerulea, particularly in the nuclear membrane, a real passage of small nucleoli from the nucleus to the cytoplasm. Thus not all the nucleoli which appear lit...
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Article
Azione dell'«Epidermal Growth Factor» sulla sintesi di acidi nucleici e proteine dell'epitelio cutaneo
The biological effect has been investigated of a specific protein with a growth-stimulating activity on epidermal cells.
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Article
Attività di neurosecrezione nel sistema nervoso di un Turbellario rabdocelo:Mesostoma lingua (Abildg.)
This investigation is concerned with the neurosecretory activity in the cerebral ganglion of a rhabdocoel turbellarian:Mesostoma lingua (Abildg.).
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Article
Mitocondri, zone del Golgi e globuli vitellini negli ovociti in accrescimento diPlanorbis corneus L. (Moll. Gast. Polm.)
The authors observed, in the oocytes ofPlanorbis corneus, that the yolk globules are formed from the mitochondria, which first swell up and then are filled with proteic particles (of a probably ribosomal nature)....
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Article
Ulteriori dati sull'attività dei derivati triazinici nelle infezioni da virus
A number of 2-amino-4-morpholinyl-s-triazine derivatives has been synthetized by the authors, and the activity of these compounds has been tested against some viral infections in laboratory animals.
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Article
Una nuova classe di composti ad azione anti-ulcera: gli esteri farnesilacetici
In a new series of synthetic compounds, the farnesyl acetic esters, some specifically effective drugs for the treatment of experimental gastric ulcer have been singled out. They have shown to be completely lac...
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Article
I sedimenti del lago di Monterosi
This note is a preliminary report on some research being carried out at present on the sediments of Monterosi, a volcanic lake of Central Italy, under the direction of Prof.G. E. Hutchinson, of Yale University, U...
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Article
Glicolisi anaerobia del pancreas di cavia
The enzymes of anaerobic glycolysis are present in the granules of secretion and in the mitochondria of pancreas of guinea pig. On the otherhand, it has not been possible to demonstrate their presence in the s...
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Article
Aspetti del nucleolo di cellule normali e patologiche
On the basis of research carried out on various animal and plant tissues, both normal and pathologic, the author reaches the conclusion that two chief functions can be attributed to the nucleolus. One of them ...
