vinca major, minor and rosea are three species of vinca genus and apocynaceae family. the present work is to investigate antimicrobial effects of these plants against candida albicans, pseudomonas aeroginosa and staphylococus aureus. alkaloids from leaf extracts had a better effect on pseudomonas aeroginosa than alkoloids from stem and root. alkaloids from stem extracts were more effective than...

A novel prosthetic group, which is present in NADH dehydrogenase (EC 1.6.99.3) from Pepfosfrejfococcus etsdenii, has been purified and its physicochemical properties investigated. The chemical structure of this species has been established as the FAD analogue of 7-methyl-B-hydroxyisoalloxazine. The proposed structure is confirmed by: (a) chemical synthesis of 7-methyl-S-hydroxy-isoahoxazine mod...

Based on MS and NMR data and bioassay-guided tracing, three insecticidal alkaloids I, II and III from Cynanchum mongolicum were identified to be antofine N-oxide, antofine and tylophorine. Alkaloid I was more toxic than alkaloids II and III, but they were less active against Spodoptera litura than total alkaloids. The contact toxicity from these alkaloids against the aphid Lipaphis erysimi was ...

Datura metal L is an important medicinal plant containing the alkaloids like scopalamine(hyoscine),hyoscyamine(atropine) scutellaerin etc .The total alkaloids present in the callus were higher than the amount of alkaloids present in leaves .For the higher production of alkaloids the medium plays avital role.The addition of L-arginine were enhanced the alkaloid production The higher production o...

Latex vacuoles o f Chelidonium majus (Papaveraceae) naturally sequester protoberberine and benzophenanthridine alkaloids. Isolated vesicles take up a number o f other heterologous alkaloids, such as 9,10-dihydroergocryptine, vinblastine, strychnine, nicotine, colchicine, lupanine, and 13-hydroxylupanine, with a strong preference for the indole alkaloids and for nicotine. Kinetic data clearly sh...

Thymus quinquecostatus, with more medical value, is a kind of wild plants. In order to exploit and utilize this plant, we studied the species and locations of alkaloids in its leaves. In this paper, histochemical study of leaves at different developing stages was taken to localize the alkaloids. Meanwhile, the kinds and content of alkaloids in leaves were identified using GC-MS technique. It wa...

An alkaloid is a type of plant-derived organic compound. Alkaloids are generally composed of oxygen, hydrogen, carbon, and nitrogen. Some alkaloids are considered toxic, but others are often used medicinally. Alkaloids one might encount er in everyday life include caffeine, the drugs atropine and quinine, and the deadly nightshade plant. Alkaloids are relatively rare in plants. They have what's...

A virtual screening analysis of our library of phytochemical structures with dengue virus protein targets has been carried out using a molecular docking approach. A total of 2194 plant-derived secondary metabolites have been docked. This molecule set comprised of 290 alkaloids (68 indole alkaloids, 153 isoquinoline alkaloids, 5 quinoline alkaloids, 13 piperidine alkaloids, 14 steroidal alkaloid...

A GC-MS analysis of underivatized alkaloids from leaves of Crinum latifolium was performed. From the identified 15 alkaloids, 9 were found for the first time in this plant. Almost all alkaloids belonged to the crinane type. Substantial changes in the methylation and oxidation pattern of the alkaloids at and after flowering were observed.