Results 161 to 170 of about 2,123 (203)

Ecdysterone biosynthesis in Podocarpus elata

Phytochemistry, 1968
Abstract The insect molting hormone ecdysterone was isolated in radioactive form after administration of cholesterol-4- 14 C to Podocarpus elata seedlings. Cholestenone-4- 14 C, however, was not significantly incorporated into ecdysterone by this plant. The biosynthetic implications of these results are discussed.
Horst H. Sauer, Raymond D. Bennett, Erich Heftmann   +2 more
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Cirriped vitellogenesis: Effect of ecdysterone in vitro

General and Comparative Endocrinology, 1977
Abstract Ovarioles of Balanus amphitrite and B. eburneus were cultured with ecdysterone in medium (10−4–1 μg/ml). Yolk droplets of mature oocytes showed increasing degeneration with increasing concentration of ecdysterone. Other ovarian cells, cement gland cells, and mantle parenchyma were not affected to any extent. Although preliminary, the results
U E, Fyhn, H J, Fyhn, J D, Costlow
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Influence of ecdysterone on molting in Palaemonetes

General and Comparative Endocrinology, 1972
Abstract Since many female decapod crustaceans are known to delay molting until after release of their larvae or young, such ovigerous female shrimp may have a high titer of molt-inhibiting substance. At that time, comparison can be made between ovigerous females and mature males in terms of their response to injections of a molting hormone ...
J H, Hubschman, P W, Armstrong
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Isolation of ecdysterone from indian plants

Phytochemistry, 1971
Abstract Ecdysterone has been isolated from the following plants: Achyranthes aspera, Gomphrena celosioides, Trianthema portulacastrum and Sesuvium portulacastrum, the latter being one of the best sources for ecdysterone.
A. Banerji, G.J. Chintalwar, N.K. Joshi, M.S. Chadha   +3 more
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Cellular Response to Ecdysterone in vitro

Science, 1969
Organ cultures of hindgut from diapausing tobacco hornworm pupae, Manduca sexta (Johannson), produce an abundance of migrant cells around the original explant. With time-lapse cinematography, these cells were seen to move slowly and tended to aggregate.
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Cockroach Leg Regeneration: Effects of Ecdysterone in vitro

Science, 1970
Regenerating epithelial tissue from the cockroach leg forms two cuticular coverings. The first of these consists of a protein-carbohydrate complex that is replaced before molting. The second covering represents the cuticle containing chitin. The deposition of the cuticle can be induced in vitro by adding ecdysterone to the culture medium.
E P, Marks, R A, Leopold
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Source and Availability of Ecdysterones

1974
Achyranthes radix, a source of the phytoecdysones, ecdysterone (I) and inokosterone (II), is an important crude drug that has been used for diuretic, tonic, and analgesic purposes in East Asia from ancient times. The components of this crude drug have been reported by many chemists to be a saponin with oleanolic acid as a sapogenin, achyrantin ...
Shuntaro Ogawa, Nobushige Nishimoto, Hiroyuki Matsuda   +2 more
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Estimation of ecdysterone from sulfuric acid induced fluorescence

Steroids, 1972
Abstract The sulfuric acid induction of ecdysterone (2 β ,3 β ,14 α ,20R,22R,25-hexahydroxy-5 β -cholest-7-en-6-one) fluorescence was examined under various conditions of acid concentrations, acid diluents, reaction duration and reaction temperature. With appropriate conditions ecdysterone standards could be estimated in amounts from ca.
M W, Gilgan, M E, Zinck
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[Immunomodulating effect of ecdysterones].

Ukrainskii biokhimicheskii zhurnal (1978), 1992
Ecdysterone, its 20-desoxy-derivative alpha-ecdysone, their 2-desoxy-derivatives ecdysterone 2, 3, 22-triacetate and preparation BTI-4 have been studied for their effect on [3H]-thymidine incorporation in different populations of animal and human lymphocytes.
G N, Fomovskaia, A G, Berdyshev, Iu D, Kholodova   +2 more
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Effect of ecdysterone on hyperglycemia in experimental animals

Biochemical Pharmacology, 1971
Abstract Ecdysterone, one of the insect-metamorphosing steroids isolated from plants (Amaranthaceae: Achyranthes fauriei ), has been recognized to have a suppressive effect on hyperglycemia induced by several hyperglycemic agents. While the administration of ecdysterone did not alter the blood glucose level of normal animals, pretreatment with ...
T, Yoshida, T, Otaka, M, Uchiyama, S, Ogawa   +3 more
openaire   +2 more sources