Bioassay-guided isolation of glycolipids from the seaweed Gracilaria corticata

Bioassay-guided isolation and identification of antifungal compounds from ginger.

A bioassay-guided isolation of antifungal compounds from an African land race of ginger, Zingiber officinale Roscoe, led to the identification of [6], [8] and [10]-gingerols and [6]-gingerdiol as the main antifungal principles. The compounds were active against 13 human pathogens at concentrations of <1 mg/mL. The gingerol content of the African land race was at least 3 x higher than that of ty...

Bioassay-Guided Isolation of Cytotoxic Isocryptoporic Acids from Cryptoporus volvatus.

The present work constitutes a contribution to the phytochemical investigation of Cryptoporus volvatus aiming to search for effective cytotoxic constituents against tumor cell lines in vivo. Bioassay-guided separation of the ethylacetate extract of C. volvatus afforded four new isocryptoporic acid (ICA) derivatives, ICA-B trimethyl ester (1), ICA-E (2), ICA-E pentamethyl ester (3), and ICA-G (4...

Bioassay - guided Isolation of Antiproliferative Triterpenoids

Nutritional composition of edible seaweed Gracilaria changgi

Gracilaria changgi, an edible seaweed was analyzed to determine its proximate chemical composition, mineral elements, vitamin C, b-carotene, free fatty acid and amino acid contents. G. changgi showed vitamin A activity of 865 mg rectinol equivalents/100 g sample. It contained a higher composition of unsaturated fatty acids (74%), mainly the omega fatty acids and 26% of saturated fatty acids (ma...

Biosorption of Cd2+ and Cu2+ from aqueous solution using Gracilaria corticata waste biomass

Pollution of aquatic environments by toxic trace metals has been taking place because of discharge of untreated effluents from many industrial processes. Conventional methods used for removing dissolved heavy metal ions from wastewaters have significant disadvantages including incomplete metal removal, requirements for expensive equipment, high energy requirements and generation of toxic sludge...