Oximes
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. Nitric Oxide Emissions from Soybean Leaves during in Vivo Nitrate Reductase Assays 1
Recent work identified acetaldehyde oxime as the predominant product purged by inert gases from anaerobic in vivo nitrate reductase (NR) assays of soybean (Glycine max [L.] Merr.) leaves. Another recent study supported earlier research findings which identified the primary product evolved from soybean leaves as nitric oxide (NO). This paper provides evidence
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14. Bioactive alkaloids of frog skin: Combinatorial bioprospecting reveals that pumiliotoxins have an arthropod source
Nearly 500 alkaloids have been detected in skin extracts from frogs of the family Dendrobatidae. All seem to have been sequestered unchanged into skin glands from alkaloid-containing arthropods. Ants, beetles, and millipedes seem to be the source of decahydroquinolines, certain izidines, coccinellines, and spiropyrrolizidine oximes. But the dietary source fo
National Academy of Sciences.
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15. Some observations relating to the oximate ion promoted unblocking of oligonucleotide aryl esters.
The action of the N1, N1, N3, N3-tetramethylguanidinium salts of a number of oximes on 5'-O-methoxytetrahydropyranylthymidylyl-(3' leads to 5')-3'-O-methoxytetrahydropyranylthmidine aryl esters (7a-c) in dioxan-water (1:1 v/v) has been investigated. The O-chlorophenyl ester (7a) was unblocked by 4-nitrobenzaldoximate ion ca. 2.5 times as rapidly as the p-chl
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16. The chemistry of poisons in amphibian skin.
Poisons are common in nature, where they often serve the organism in chemical defense. Such poisons either are produced de novo or are sequestered from dietary sources or symbiotic organisms. Among vertebrates, amphibians are notable for the wide range of noxious agents that are contained in granular skin glands. These compounds include amines, peptides, pro
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17. Isolation of a Microsomal Enzyme System Involved in Glucosinolate Biosynthesis from Seedlings of Tropaeolum majus L.
An in vitro system that converts phenylalanine to phenylacetaldoxime in the biosynthesis of the glucosinolate glucotropaeolin has been established in seedlings of Tropaeolum majus L. exposed to the combined treatment of jasmonic acid, ethanol, and light. The treatment resulted in a 9-fold induction, compared with untreated, dark-grown seedlings, of de novo b
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18. Evidence for an Elongation/Reduction/C1-Elimination Pathway in the Biosynthesis of n-Heptane in Xylem of Jeffrey Pine.
The biosynthetic pathway to n-heptane was investigated by examining the effect of the [beta]-keto acyl-acyl carrier protein synthase inhibitor (2R,3S)-2,3-epoxy-4-oxo-7E,10E-dodecadienamide (cerulenin), a thiol reagent ([beta]-mercaptoethanol), and an aldehydetrapping reagent (hydroxylamine) on the biosynthesis of n-[14C]heptane and putative intermediates in
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19. Involvement of cytochrome P450 in oxime production in glucosinolate biosynthesis as demonstrated by an in vitro microsomal enzyme system isolated from jasmonic acid-induced seedlings of Sinapis alba L.
An in vitro enzyme system for the conversion of amino acid to oxime in the biosynthesis of glucosinolates has been established by the combined use of an improved isolation medium and jasmonic acid-induced etiolated seedlings of Sinapis alba L. An 8-fold induction of de novo biosynthesis of the L-tyrosine-derived p-hydroxybenzylglucosinolate was obtained in e