BACKGROUND There is a strong interest in using photosynthetic cyanobacteria as production hosts for biofuels and chemicals. Recent work has shown the benefit of pathway engineering, enzyme tolerance, and co-factor usage for improving yields of fermentation products. RESULTS An n-butanol pathway was inserted into a Synechocystis mutant deficient in polyhydroxybutyrate synthesis. We found that ...

The development of sustainable replacements for fossil fuels has been spurred by concerns over global warming effects. Biofuels are typically produced through fermentation of edible crops, or forest or agricultural residues requiring cost-intensive pretreatment. An alternative is to use photosynthetic cyanobacteria to directly convert CO2 and sunlight into fuel. In this thesis, the cyanobacteri...

In recent decades, many kinds of research have been conducted on alternative fuels for compression ignition (CI) engines. Low/zero-carbon fuels, such as bioalcohols and hydrogen, are the most promising extensively studied because their availability, ease manufacturing, environmental benefits. Using these in CI engines is environmentally economically beneficial. The common alcohols methanol, eth...

separation of ten sedative- hypnotic drugs was performed by rp-hplc using mixed micellar mobile phase. effect of temperature, type and amount of organic modifier in mobile phase on efficiency (n) and asymmetry factor (b/a) showed that, the appropriate conditions for a good separation were 35°c and 7% (v/v) butanol in mobile phase.  variations of selectivity factor versus butanol concentration, ...

Ascidians are involved with rich source of bioactive agents which could be used for novel antimicrobial drugs. Ascidians are belongs to phylum chordate and class Ascidiacea. In present study two ascidians P. madrasensis and P. nigra were collected from Tuticorin, Southeast coast of India. The antibacterial compounds were screened to evaluate antibacterial activity in and different solvent like ...

The paper presents the experimental test results reflecting comparative changes in performance efficiency and emissions of exhaust a naturally aspirated, four-stroke, single-cylinder, air-cooled diesel engine due to its transition from neat rapeseed oil biodiesel fuel blends prepared by mixing various proportion (by volume) methyl ester (B) butanol (Bu). lubricity properties biodiesel-n-butanol...

BACKGROUND Liver disorder was associated with alcohol consumption caused by hepatic cellular damages. Opuntia ficus-indica fruit extracts (OFIEs), which contain betalain pigments and polyphenols including flavonoids, have been introduced as reducing hangover symptoms and liver protective activity. OBJECTIVE To evaluate hepatoprotective activity of OFIEs and isolated compounds by high-speed co...