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1.
G A Amirante 《Experientia》1976,32(4):526-528
It was our purpose to study the immunological activity of circulating fluid cells in the blattoid insect Leucophaea maderae L. These cells are generically called haemocytes; after a preliminary morphological study under optical microscope, they were treated with anti-heteroagglutinins serum marked with fluorescein isothiocyanate. Thus, it was possible to show the presence of heteroagglutinins into the cytoplasm, as regards one group of haemocytes, and on the cell membrane for the second group.  相似文献   

2.
Résumé Les embryoïdes se développant à partir du bourgeon de calle deRanunculus sceleratus deviennent des plantules. Ces plantules produisent des embryons surnuméraires à l'extrémité radiculaire ainsi que tout le long de la surface de la tige. Les études anatomiques révèlent que ces embryons sont d'origine épidermique. C'est une nouvelle preuve de la totipotence des cellules.  相似文献   

3.
Eggs in Leucophaea maderae are present in an ootheca which remains in the broodsac until hatching of the larvae. During incubation, the water content of the eggs increases from 36 to 77%, the dry weight remaining constant. Water is possibly provided by the mother.  相似文献   

4.
U S Srivastava  P Varma 《Experientia》1979,35(11):1457-1458
Among the haemocytes of Sarcophaga ruficornis, only the prohaemocytes divide. Injection of phytohaemagglutinin-P induces 100% prohaemocytes to undergo mitosis but does not induce mitosis in other cells. Mitotic stages other than the prophase are apparently very short lived.  相似文献   

5.
Summary Among the haemocytes ofSarcophaga ruficornis, only the prohaemocytes divide. Injection of phytohaemagglutinin-P induces 100% prohaemocytes to undergo mitosis but does not induce mitosis in other cells. Mitotic stages other than the prophase are apparently very short lived.Acknowledgment. We express our gratitude to the State Council of Scientific and Industrial Research, U.P. for the grant of financial assistance to U.S.S.  相似文献   

6.
Summary The decrease of haemolymph phagocytic cells (SH) inPlanorbarius corneus after bacterial injection seems to be mediated by humoral factor(s) released into the haemolymph. SH show different adhesiveness in vitro in the presence of bacterial metabolic products.  相似文献   

7.
E Ottaviani 《Experientia》1989,45(4):368-369
The decrease of haemolymph phagocytic cells (SH) in Planorbarius corneus after bacterial injection seems to be mediated by humoral factor(s) released into the haemolymph. SH show different adhesiveness in vitro in the presence of bacterial metabolic products.  相似文献   

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Summary Danaus plexippus L. andDanaus chrysippus L. have been found to store pyrrolizidine alkaloids obtained from adult food plants and it is suggested that the alkaloids contribute to the unpalatability of the butterflies to potential predators.Acknowledgment. We thank Dr.C. C. J. Culvenor for rearing some of the butterflies andJ. M. Smith for plant collection. The plants were identified by the national Herbarium, Melbourne.  相似文献   

10.
M Stocker  U Hilgenfeldt  F Gross 《Experientia》1979,35(8):1113-1115
High-titer antibodies against bradykinin were raised in rabbits. 2 different conjugates of bradykinin were used for immunization: bradykinin coupled to human serum albumin via 1,5-difluoro-2,4-dinitrobenzene and bradykinin coupled to edestin via 1-ethyl-3(3-dimethyl-aminopropyl)-carbodiimide. The sensitivity of the radioimmunoassay method is in the range of 1-50 pg of bradykinin. Cross-reaction of anti-bradykinin antisera occurred with kallidin and met-lys-bradykinin.  相似文献   

11.
Summary Pistia stratiotes L., a perennial water weed found in natural water bodies in Nigeria, removes organic and inorganic nutrients as it grows and spreads in the waters. In a lake which received a variety of pollutants, the plant reduced oxidizable organic matter (4-h permanganate value) by 61%, the biochemical oxygen demand by 85.3%, ammonia nitrogen by 95.3% and water soluble phosphorus by 85%. The plant also removed other mineral matter.  相似文献   

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13.
Zusammenfassung Cancerogene Chemikalien oder Röntgenstrahlen verursachten am Regenwurm (Lumbricus terrestris) verschiedene neoplastisch aussehende Beschädigungen.  相似文献   

14.
Résumé Trois anthocyanines ont été extraits de tubercules d'une variété de l'ignameD. alata à chair pourpre. Tous les 3 sont des glycosides de la cyanidine: le pigment principal est le cyanidine-3,5-diglucoside.  相似文献   

15.
Résumé Trois arthocyanidines acylées ont été extraits de tubercules d'une variété deDioscorea alata L. des Antilles. Tous 3 sont des glycosides de la cyanidine: le pigment principal est la cyanidine-3-gentiobioside acylée d'acide ferrulique; les 2 autres pigments secondaires sont semblables aux cyanidine-3-glycosides acylées d'acide ferrulique.  相似文献   

16.
Riassunto Nell'epatopancreas di due Gasteropodi marini:Aplysia depilans eA. limacina è presente un emocromogeno assai simile al citocromoh di Helix. Il pigmento è stato estratto e purificato e le sue proprietà fisiche, chimiche e biologiche sono state confrontate con quelle dell'emoproteina di Helix.  相似文献   

17.
Zusammenfassung Die Isolierung von Bergapten (5-Methoxy-Psoralen) ausDictamnus albus L. wird beschrieben. Die photosensibilisierende Wirkung der Inhaltsstoffe dieser Pflanze nach UV-Bestrahlung auf die menschliche Haut ist hauptsächlich auf dieses Furocoumarin zurückzuführen.  相似文献   

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19.
Zusammenfassung ZermahleneClitoria ternatea-Wurzeln oder deren Extrakt in 95% Alkohol zeigten bei oraler Verabreichung in nicht-toxischer Dosis keine nennenswerte diuretische oder natriuretische Wirkung beim Hund. Intravenöse Gaben des Extraktes führten zu mässiger Steigerung der Ausscheidung von Natrium und Kalium im Harn, zeigten aber gleichzeitig auch Anzeichen von Nierenschädigung.  相似文献   

20.
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