Results 161 to 170 of about 11,970 (214)
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Nature, 1976
TICKS and insects develop and grow through intermittent replacement of their integument. This moulting does not occur beyond the adult stage, with the exception of primitive apterygote insects such as silverfish, which continue to moult and grow after they become sexually mature. Moulting ceases to occur in the pterygote adult insect because the glands
C, Mango, I R, Odhiambo, R, Galun
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TICKS and insects develop and grow through intermittent replacement of their integument. This moulting does not occur beyond the adult stage, with the exception of primitive apterygote insects such as silverfish, which continue to moult and grow after they become sexually mature. Moulting ceases to occur in the pterygote adult insect because the glands
C, Mango, I R, Odhiambo, R, Galun
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Ecdysone as A Hypocholesterolemic Agent
Archives Internationales de Physiologie et de Biochimie, 1969AbstractIt is well-known from the previous findings (Tomkins et al., 1953; Bucher et al., 1959 and 1960) that cholesterol inhibits its own synthesis by a negative feed-back control. Since then, bile salts and their conjugates in the enterohepatic circulation have been shown to be implicated in the regulation of cholesterol synthesis by a double feed ...
P J, Lupien, C, Hinse, K D, Chaudhary
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Ecdysone Analog: Conversion to Alpha Ecdysone and 20-Hydroxyecdysone by an Insect
Science, 1969The tritium-labeled synthetic ecdysone analog Δ 7 -5β-cholestene-2β,3β,14α-triol-6-one terminated diapause when injected into diapausing tobacco hornworm pupae and was converted into tritium-labeled α-ecdysone and tritium-labeled 20-hydroxyecdysone.
J N, Kaplanis +3 more
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On ecdysone-binding proteins and ecdysone-like material in nematodes
International Journal for Parasitology, 1977Abstract Homogenates of Panagrellus redivivus and extracts of P. redivivus, Aphelenchus avenae and Haemonchus contortus were examined for ecdysone-binding proteins and ecdysone-like material, respectively. Sucrose density-gradient centrifugation, polyacrylamide gel electrophoresis and charcoal-dextran-binding assay failed to detect ecdysone ...
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Russian Chemical Reviews, 1971
Ecdysones ara a group of structurally similar steroid compounds with hormonal activity in the moulting and metamorphosis of insects. The review deals with the sources from which ecdysones are isolated, their structure determination, and methods for their partial synthesis.
A A Akhrem, Inna S Levina, Yu A Titov
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Ecdysones ara a group of structurally similar steroid compounds with hormonal activity in the moulting and metamorphosis of insects. The review deals with the sources from which ecdysones are isolated, their structure determination, and methods for their partial synthesis.
A A Akhrem, Inna S Levina, Yu A Titov
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Hoppe-Seyler´s Zeitschrift für physiologische Chemie, 1978
The occurrence of the enzyme ecdysone oxidase was demonstrated in several insect species. In blowflies it was detected mainly in eggs and pupae. The enzyme activity in blowflies varies during development parallel to the ecdysteroid content. This suggests a specific but presently unknown function of the enzyme. Ecdysone oxidase was located mainly in the
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The occurrence of the enzyme ecdysone oxidase was demonstrated in several insect species. In blowflies it was detected mainly in eggs and pupae. The enzyme activity in blowflies varies during development parallel to the ecdysteroid content. This suggests a specific but presently unknown function of the enzyme. Ecdysone oxidase was located mainly in the
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Gas chromatographic analysis of ecdysone
Experientia, 1970Nous avons developpe une methode d'analyse micro-quantitative de l'ecdysone (hormone de la mue des insectes) par Chromatographie gazeuse. Elle permettera l'analyse chimique de l'ecdysone, qui a ete dosee jusqu'a present par des methodes biologiques.
M, Katz, Y, Lensky
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Effect of ecdysone and ecdysone analogues on two Balbiani rings of Acricotopus lucidus
Experimental Cell Research, 1972Abstract The activity of two Balbiani rings (BR-3, BR-4) in the salivary gland of Acricotopus lucidus is controlled by ecdysone. This result agrees with our former conclusion worked out by indirect methods [22]. The injection of ecdysone and ecdysone analogues (ecdysterone, inokosterone) into the last instar larvae led to an inactivation of BR-3 ...
R, Panitz, U, Wobus, E, Serfling
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The synthesis of 23,24-14C-ecdysone
Steroids, 1973Abstract The synthesis of 23,24-14C-ecdysone, using 3,4-14C-2-methyl-3-butyn-2-yl tetrahydropyranyl ether, is described.
W B, Smith, G P, Newsoroff
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Nonsteroidal Ecdysone Agonists
2005Nonsteroidal ecdysone agonists are novel compounds that have become attractive candidates not only as pest control agents in agriculture but also as tools for research. Their narrow spectrum of activity makes them relatively safe as pesticides, and their mode of action as ligands for gene expression has found application in gene therapy and inducing ...
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