Results 131 to 140 of about 18,562 (160)
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Invertebrate Reproduction & Development, 1990
Summary The steroid molting hormone of insects and other arthropods regulates gene activity in target tissues through its association with a specific, high affinity receptor protein. In this review we summarize recent advances in several areas of ecdysteroid receptor research, including efforts to characterize and purify the receptor protein ...
HANS J. BIDMON, TIMOTHY J. SLITER
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Summary The steroid molting hormone of insects and other arthropods regulates gene activity in target tissues through its association with a specific, high affinity receptor protein. In this review we summarize recent advances in several areas of ecdysteroid receptor research, including efforts to characterize and purify the receptor protein ...
HANS J. BIDMON, TIMOTHY J. SLITER
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New Ecdysteroids fromSerratula tinctoria
Planta Medica, 1992Six new ecdysteroids have been isolated from SERRATULA TINCTORIA; these are: the 2,22- and 3,22-diacetates of 20-hydroxyecdysone, 5beta-hydroxyrubrosterone, 3-epi-poststerone, 3-epi-rubrosterone, and 22-oxo-20-hydroxyecdysone. These minor compounds were found together with the known ecdysteroids, 20-hydroxyecdysone, its 2-, 3-, and 22-monoacetates ...
Rudel D +7 more
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Ant Ecdysteroid Extraction and Radioimmunoassay
Cold Spring Harbor Protocols, 2009INTRODUCTIONEcdysteroids are a group of steroid compounds present in many plant and invertebrate species. In arthropods, they function primarily as hormones involved in the regulation of molting. This protocol describes how to extract ecdysteroid hormones from ant specimens and subsequently quantify circulating levels of the hormone. The hormone can be
Colin, Brent, Adam, Dolezal
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Dimeric Ecdysteroid Analogues and Their Interaction with the Drosophila Ecdysteroid Receptor
Collection of Czechoslovak Chemical Communications, 2006Three structurally related specific ecdysteroid derivatives, 7,7'-dimers of 14-deoxy-8(14)-ene transformed 20-hydroxyecdysone, ponasterone A and ajugasterone C, were obtained by photochemical transformation. The structures of the dimeric ecdysteroids were identified mainly by NMR spectroscopy supported by MS and IR spectroscopy.
Juraj Harmatha +4 more
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Stereoselective synthesis of 9α-hydroxylated ecdysteroids
Steroids, 2010Treatment of ecdysteroids with excess of TBAF in THF was shown to proceed with stereoselective oxidation at the 9alpha position of the carbon skeleton. The stereochemistry of the products was confirmed by X-ray analysis. Using this method, 9alpha-hydroxyecdysteroids were obtained in good yield.
Drach, S. +5 more
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1984
Helminths are medically and economically important parasites of many higher and lower animals. Several hundred million people, especially in countries of the third world, suffer from diseases caused by these parasites. Only a few representatives of the helminths will be mentioned here: the blood flukes, Schistosoma mansoni, S. haematobium, and S,
J. Koolman, J. Walter, H. Zahner
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Helminths are medically and economically important parasites of many higher and lower animals. Several hundred million people, especially in countries of the third world, suffer from diseases caused by these parasites. Only a few representatives of the helminths will be mentioned here: the blood flukes, Schistosoma mansoni, S. haematobium, and S,
J. Koolman, J. Walter, H. Zahner
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1984
The epidermal cells of most annelid worms secrete a cuticle which consists of a mixture of proteins and sugars. The Hirudinea have been reported, more than a century ago [1], to molt, a process which is less conspicuous in other annelid worms, although it is regularly observed in species like the polychaete Nereis divenicolor.
M. Porchet +4 more
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The epidermal cells of most annelid worms secrete a cuticle which consists of a mixture of proteins and sugars. The Hirudinea have been reported, more than a century ago [1], to molt, a process which is less conspicuous in other annelid worms, although it is regularly observed in species like the polychaete Nereis divenicolor.
M. Porchet +4 more
openaire +1 more source