background: lipase is an enzyme with immense application potential. ester synthesis by lipase catalysis in organic media is an area of key industrial relevance. enzymatic preparations with traits that cater to the needs of this function are hence being intensely researched. objective: the objectives of the study were to immobilize the lipase from bacillus sp. ps35 by cross-linking and adsorptio...

The novel 5,10-dihydrophencomycin methyl ester (4) and the known microbial metabolites (2-hydroxyphenyl)-acetamide (1), menaquinone MK9 (II, III, VIII, IX-H8) (2), and phencomycin (3a) were isolated from an unidentified marine Streptomyces sp. and the structures were elucidated by NMR methods. Compound 4 shows weak antibiotic activity against Escherichia coli and Bacillus subtilis.

There is growing interest in biodiesel (fatty acid methyl ester or FAME) because of the similarity in its properties when compared to those of diesel fuels. Diesel engines operated on biodiesel have lower emissions of carbon monoxide, unburned hydrocarbons, particulate matter, and air toxics than when operated on petroleum-based diesel fuel. Production of fatty acid methyl ester (FAME) from rap...

Bergenia ciliata is a weed of hilly areas Pakistan that generally grows in rock crevices. In the present study, flowers this weeds were collected from Murree. The dried extracted methanol and subjected to GC-MS analysis showed 7 compounds it. predominant compound was hexanedioic acid, bis(2-ethylhexyl) ester (48.88%) followed by γ-sitosterol (22.56%). Moderately occurring cyclohexane, 1,3,5-tri...

Biofuels are playing important role in recent decades as substitutes for petro diesel. Biodiesel derived from vegetable oils are found to give comparable performance and emission characteristics. In this paper a comparative study has been done between two fuels combinations i.e. jatropha and castor. The biodiesel was prepared from neat oils and blends of biodiesel (up till 20%) were prepared...

Because the seleno-l-cysteine (SeCys or Sec) insertion into selenoproteins occurs by a specific translational control process, it is quite difficult to express the SeCys-containing polypeptides even by the state-of-the-art genetic engineering techniques. In this paper, we describe a convenient synthetic method for the selective introduction of a SeCys derivative to polypeptides under physiologi...

The addition of co-solvent on in situ trans esterification was considered as one method to improve the extractive process and increase yield biodiesel from microalgae. In this study, with using microwave studied for improving performance produced compared without addition. optimal reaction conditions (ratio microalgae methanol 1:15 w /v; 30 ml % H2SO4) at 50 min time, Fatty Acid Methyl Ester (F...

General information. All manipulations were performed in a N2 filled drybox or using standard Schlenk techniques. Allyl benzene, methyl vinyl ketone, pchlorostyrene, methyl methacrylate, diethyl diallylmalonate (3), and 1,6-heptadien-4ol (6) were purchased from Aldrich and used without further purification. cis-4Cyclopentene-1,3-diol and (+)-citronellal were purchased from Fluka and used withou...

peperomia pellucida leaf extract was characterized for its anticancer, antimicrobial, antioxidant activities, and chemical compositions. anticancer activity of p. pellucida leaf extract was determined through colorimetric mtt (tetrazolium) assay against human breast adenocarcinoma (mcf-7) cell line and the antimicrobial property of the plant extract was revealed by using two-fold broth micro-di...