Chemical studies on the constitution of some pollen and spore membranes
作者:G. Shaw、A. Yeadon
DOI:10.1039/j39660000016
日期:——
The membranes of Lycopodium clavatum spores and Pinus silvestris pollen grains are similar, and have been found to consist approximately of cellulose (10—15%), an ill-defined “xylan” fraction (10%), a lipid fraction (55—65%) which on oxidative degradation gives a mixture of non-branched mono- and di-carboxylic acids with 16 carbon atoms or less, and a lignin-like fraction estimated to be 10—15%. The
11. The condensation of fluorene with acetone. Part V. Contrasting reactions of 9-fluorenylmagnesium bromide and of 9-fluorenyllithium with αβ-unsaturated ketones
作者:S. Horwood Tucker、Margaret Whalley
DOI:10.1039/jr9490000050
日期:——
Barre; Piche, Canadian Journal of Research, Section B: Chemical Sciences, 1941, vol. 19, p. 158,162
作者:Barre、Piche
DOI:——
日期:——
68. Studies in the polyene series. Part XXV. Molecular structure and vitamin-A activity. The synthesis of a biologically active C17 acid
作者:Ian Heilbron、E. R. H. Jones、R. W. Richardson
DOI:10.1039/jr9490000287
日期:——
Microwave-assisted Synthesis and Bioevaluation of Some Semicarbazones
作者:Laila Jafri、Farzana L. Ansari、Maryam Jamil、Saima Kalsoom、Sana Qureishi、Bushra Mirza
DOI:10.1111/j.1747-0285.2012.01360.x
日期:2012.6
In continuation to our efforts in finding potential therapeutic agents, a variety of biologically significant semicarbazones were synthesized by the reaction of different carbonyl compounds with phenyl semicarbazides through microwave irradiation. Initially, 18 semicarbazones were studied for their antimicrobial, antitumor, and antioxidant potential. None of the tested compounds showed any antibacterial activity; however, some compounds showed significant antifungal activity. Interestingly, all compounds showed antitumor activity when tested against tumors grown on potato discs. These compounds were also tested for their effect on OH radical‐induced oxidative DNA damage. All the compounds showed DNA protection to varying extent. Based on the promising results of antitumor and antioxidant activities, another set of 24 semicarbazones was synthesized, and all of these semicarbazones were evaluated for their antioxidant potential. The results showed that the semicarbazones derived from 2‐nitrobenzaldehyde and acetophenone were the most active 2,2‐diphenyl‐1‐picrylhydrazyl 9 (DPPH) free radical scavengers. The overall results have led to the identification of some interesting compounds which seem to have great potential to be developed into effective anticancer drugs.