The aim of this study was to evaluate the anti-oxidant activity of the flowers of the plant Vernonia cinerea (Family: Asteraceae). Flowers extracts of V. cinerea in different four organic solvents (methanol, hexane, chloroform and ethyl acetate) and water were assayed for antioxidant activity using FRAP assay. All of these extracts were found to possess significant antioxidant activity at 5mg/m...

Two novel indazole derivatives protected with p-methoxybenzyl group were synthesized and characterized. The crystal and molecular structure of 2-(4-methoxybenzyl)-4-nitro-2H-indazole as one out of the two regioisomers is reported. The compound was obtained from a saturated petroleum ether/ethyl acetate mixture and crystallizes in the triclinic space group P1. The unit cell parameters are: a = ...

The extracts of Chinesc red ant formica aquilonia were screened fbr cytotoxicity, antioxidation and antiinfiammatory properties, prolyl oligopeptidase (POP) inhibition, and the effect on the catecholaniinc secretion, Dried ants were successively extracted with hexane, ethyl acetate, aqueous acetone and distilled water, Both the hexane and ethyl acetate extracts exhibited a high level of POP inh...

We investigated the antiplasmodial properties of crude extracts from Carica papaya leaves to trace the activity through bioassay-guided fractionation. The greatest antiplasmodial activity was observed in the ethyl acetate crude extract. C. papaya showed a high selectivity for P. falciparum against CHO cells with a selectivity index of 249.25 and 185.37 in the chloroquine-sensitive D10 and chlor...

Artocarpus altilis (breadfruit) leaf extracts in different solvent media (petroleum ether, methanol and ethyl acetate) were examined for the antimicrobial activity against some pathogenic bacterial species like Staphylococcus aureus, Pseudomonas aeruginosa, Streptococcus mutans and Enterococcus faecalis following the MIC (minimal inhibitory concentrations). Steroids, phytosterols, gums and resi...

Acetic acid is introduced into cellulose conversion processes as a consequence of composition of lignocellulose feedstocks, causing significant inhibition of adapted, genetically modified and wild-type S. cerevisiae in bioethanol fermentation. While adaptation or modification of yeast may reduce inhibition, the most effective approach is to remove the acetic acid prior to fermentation. This wor...

Symplocos racemosa Roxb bark belongs to the family: Symplocaceae. In Ayurveda it is known as Lodhra. The bark was collected and dried for four days under sun and powdered. It was extracted with different solvents ethanol, methanol and ethyl acetate by soxhlet hot extraction process. Preliminary phytochemical analysis was carried out for different extracts. It was found that saponin glycosides a...

Phosalone, malathion and diazinon were analyzed in corn oil using solid phase extraction (SPE)with lanthanum silicate as a new solid sorbent followed by gas chromatography with nitrogenphosphorus detection (GC-NPD). The efficiency of different eluents (methanol, dichloromethane,ethyl acetate, dichloromethane — ethyl acetate (1:1) and ethyl acetate — methanol (1:1)) werecompared for elution of o...

      Butyl-hydroxytoluene (BHT) is one of the major synthetic antioxidants with a wide range usage. Replacement of artificial antioxidants with natural antioxidants is highly considered. In this research, the antioxidant activity of Juniperus excelsa was investigated by using reducing power, DPPH radical scavenging and inhibition of lipid peroxidation. Also, the amounts of phenolic an...

Azolla microphylla Kaulf. is an aquatic nitrogen fixing pteridophyte commonly found in aquatic habitats including paddy fields. Methanolic extract of the fronds of A. microphylla was subjected to partial purification by solvent partitioning with diethyl ether and ethyl acetate followed by hydrolysis, and further partitioning with ethyl acetate. The two fractions, thus obtained were tested for a...