Preliminary investigations have shown that Clostridium acetobutylicum and related butyric-acid butyl-alcohol bacteria, fail to develop in a synthetic medium containing only ammonium sulphate, inorganic salts and glucose. These results suggest that perhaps the organisms require complex nitrogen compounds or some specific growth factor. Wood, Tatum and Peterson (1937), Wood, Andersen and Werkman ...

This study aims to investigate larvicidal activities of extracts of Cassia mimosoides leaves and pods as a potential agent in vector control of malaria and to evaluate repellent effect against Anopheles gambiae mosquito of the extract formulated in an aqueous cream base. Petroleum spirit, ethanol, water and dichloromethane extracts were tested against third and fourth instar Anopheles gambiae l...

Gum of Butea monosperma is used to treat microbial and fungal infections in folk medicine. To validate this use, the in- vitro antimicrobial activity of petroleum ether and alcoholic extract of Butea monosperma gum was evaluated against various microbial strains such as Staphylococcus aureus, Bacillus subtilis, Bacillus cereus, Salmonella typhimurium , Pseudomonas aeuriogenosa, Esch...

Successive solvent extract viz., petroleum ether, chloroform, methanol, ethanol and water extracts of bark of Betula utilis D. Don was evaluated for antibacterial activity, against fourteen important bacterial strains by agar-well diffusion method. Methanol extract was showed significant activity against all the tested bacteria followed by ethanol and aqueous extract. Chloroform and Petroleum e...

introduction : in the recent years, due to the wide spread of resistant bacteria on one side and several different reports about the side effects of chemical drugs on the other side, vast researches on the medicinal plants have been started. in this study, antimicrobial effect of total extract of tribulus terrestris l . and its fraction containing benzoxazine derivative (terresoxazine) was stud...

Petroleum ether extract of seeds of Cassia fistula was screened for the antifertility activity in proven fertile female albino rats at the doses 100, 200 and 500mg/kg b.wt./day. Oral administration of the extract to mated female rats on days 1-5 of pregnancy resulted in a decline in the fertility index, numbers of uterine implants and live fetuses in a dose dependent manner as was confirmed by ...

Chloroform and ether commonly are used as solvents to extract metabolic organic acids for analysis by gas-liquid chromatography in the identification of anaerobic bacteria. Because these solvents are potentially hazardous to personnel, modified extraction procedures involving the use of a safer solvent, methyl tert-butyl ether were developed which remained both simple to perform and effective f...

The investigation was carried out to determine qualitatively the phytoconstituents from the methanol and petroleum ether extracts of Drynaria quercifolia Linn. rhizome. Among the phytochemical screening of these extract, methanolic extract showed high number of constituents like alcohol, carbohydrates, phytosterols, phenols, tannins, flavonoids, proteins and aminoacids, steroids, saponins, chol...

The diethyl ether extract of the Japanese liverwort Metacalypogeia cordifolia yielded five new chroman type derivatives in addition to known sesquiterpenoids. One of the new chroman derivatives was also isolated from the ether extract of another liverwort, Cephalozia otaruensis. Their structures were established by extensive two dimensional (2D) NMR techniques and chemical evidence. They were s...

Taxus baccata (L) known as Sthauneyaka in Sanskrit(1) has wide range of biological activities including analgesic, anti-malarial, anti-rheumatic, sedative, anti-spasmodic, aphrodisiac and anti-asthmatic. In the present study, the dried and powdered bark of Taxus baccata (L) was extracted with 95% ethanol and ether at room temperature and screened for their anti--inflammatory activity by Carrage...