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Plant Growth-Promoting Brassinosteroids
Synthetic polyhydroxylated steroidal lactones are found to be highly effective plant growth promoting substances and have potential in finding new applications in crop protection and wound healing. Expand
Synthesis of brassinosteroids and relationship of structure to plant growth-promoting effects
A number of brassinosteroids with and without hydroxyl groups or an alkyl substituent in their side chain were synthesized. The alkyl substituent at C-24 highly influenced the oxidation of the C-22Expand
Sapindaceae, cyanolipids, and bugs
Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation of Jadera to a volatile excretory product could be an adaptive response to save time. Expand
Makisterone A: The major ecdysteroid from the pupa of the honey bee, Apis mellifera
Makisterone A, a 28-carbon moulting hormone, has been identified as the major free pupal ecdysteroid in the honey bee, Apis mellifera, in what is the first isolation and identification of a28-carbon ecdystersoid in an insect species from the order Hymenoptera. Expand
Ecdysones and synthetic analogs: Molting hormone activity and inhibitive effects on insect growth, metamorphosis and reproduction.
When these 5β-steroids were further tested in the house fly, the confused flour beetle, the yellow fever mosquito, and the German cockroach, many of the compounds inhibited growth, development and/or reproduction. Expand
Utilization and metabolism of dietary sterols in the honey bee and the yellow fever mosquito
Comparative sterol metabolism studies show that the yellow fever mosquito,Aedes aegypti, was shown to be capable of dealkylating and converting a radiolabeled C29 dietary sterol ([14C] sitosterol) to cholesterol. Expand
Biosynthesis of makisterone A and 20‐hydroxyecdysone from labeled sterols by the honey bee, Apis mellifera
High performance liquid chromatography of the pupal extracts revealed that [3H]campesterol was converted to a compound that behaved chromatographically identical to authentic makisterone A, and [14C]cholesterol was incorporated into a compound chromatologically like 20-hydroxyecdysone. Expand
CANDU Reactors and Greenhouse Gas Emissions
This paper was originally presented at the 11th Pacific Basin Nuclear Conference, Banff, Alberta, Canada, May 3-7, 1998. It has been updated to include additional lifecycle data on chemical releasesExpand
Metabolism of steroids in insects.
The sulfate and glucoside conjugates of sterols and ecdysteroids function, primarily, in the inactivation and excretion of steroids in insects, but can have other equally important roles related to the biosynthesis, metabolism, and transport of steroids, or the regulation of hormone titer. Expand
Biosynthesis of a C21 steroid conjugate in an insect. The conversion of [14C]cholesterol to 5-[14C]pregnen-3 beta,20 beta-diol glucoside in the tobacco hornworm, Manduca sexta.
The capability of M. sexta to so readily convert cholesterol to a C21 steroid suggests a physiological role for 5-pregnen-3 beta,20 beta-diol in this species, the first definitive proof of the biosynthesis of a C 21 steroid conjugate from cholesterol in an insect species. Expand