V Sik
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Explore the profile of V Sik including associated specialties, affiliations and a list of published articles.
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6
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25
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Recent Articles
1.
Meng Y, Whiting P, Sik V, Rees H, Dinan L
Z Naturforsch C J Biosci
. 2002 Feb;
56(11-12):988-94.
PMID: 11837689
A new ecdysteroid glycoside, limnantheoside C (20-hydroxyecdysone 3-O-beta-D-glucopyranosyl-[-->3]-beta-D-xylopyranoside [1]), together with limnantheoside A (20-hydroxyecdysone 3-O-beta-D-xylopyranoside [2]) and 20-hydroxyecdysone (3) have been isolated by bioassay/RIA-directed HPLC analyses of a methanol extract...
2.
Meng Y, Whiting P, Sik V, Rees H, Dinan L
Phytochemistry
. 2001 Jun;
57(3):401-7.
PMID: 11393520
Three bufadienolides, hellebortin A (5-[beta-D-glucopyranosyloxy]-10,14,16-trihydroxy-19-nor-[5beta,10beta,14beta,16beta]-bufa-3,20,22-trienolide [1]), hellebortin B (5-[beta-D-glucopyranosyloxy]-3,4-epoxy-14-hydroxy-19-oxo-bufa-20,22-dienolide [2]) and hellebortin C (5-[beta-D-glucopyranosyloxy]-3,4-epoxy-10,14-dihydroxy-19-nor-bufa-20,22-dienolide [3]), together with 20-hydroxyecdysone 3-O-beta-D-glucoside (4) and 20-hydroxyecdysone (5) have been isolated by bioassay- and RIA-directed...
3.
Meng Y, Bourne P, Whiting P, Sik V, Dinan L
Phytochemistry
. 2001 Jun;
57(3):393-400.
PMID: 11393519
Methanolic extracts of seeds of several (Carex species were found to antagonise the action of 20-hydroxyecdysone in the Drosophila melanogaster microplate-based B(II) cell bioassay. Bioassay-guided HPLC analysis of seeds of...
4.
Dinan L, Sarker S, Bourne P, Whiting P, Sik V, Rees H
Arch Insect Biochem Physiol
. 1999 May;
41(1):18-23.
PMID: 10331237
Seeds of Rhagodia baccata afforded, in addition to 20-hydroxy-ecdysone and polypodine B, a novel phytoecdysteroid, (20R)-22-deoxy-20,21-dihydroxyecdysone, the structure of which was elucidated unequivocally by UV, LSIMS and NMR techniques. This...
5.
Sarker S, Sik V, Rees H, Dinan L
Phytochemistry
. 1999 Jan;
49(8):2305-10.
PMID: 9887528
Bioassay/RIA-directed phytochemical examination of the seeds of Axyris amaranthoides afforded a new ecdysteroid: 1 alpha,20R-dihydroxyecdysone [1-epi-integristerone A], together with 20-hydroxyecdysone and polypodine B. The structure of 1 alpha,20R-dihydroxyecdysone was determined...
6.
Sarker S, Savchenko T, Whiting P, Sik V, Dinan L
Arch Insect Biochem Physiol
. 1997 Jan;
35(1-2):211-7.
PMID: 9131785
Bioassay-assisted HPLC analyses yielded two prieurianin-type limonoids, prieurianin and rohitukin, from the seeds of Turraea obtusifolia, which act as antagonists of 20-hydroxyecdysone action in the Drosophila melanogaster BII cell line....