The aim of this study was to investigate the role of organic acids produced by Exiguobacterium sp. strain 12/1 (DSM 21148) in neutralization of alkaline wastewater emanated from beverage industry. This bacterium is known to be able to grow in medium of pH as high as pH 12.0 and to neutralize alkaline industrial wastewater from pH 12.0 to pH 7.5. The initial investigation on the type of function...

The study deals with the effect of volume of culture medium on the enhanced production of alkaline protease by an EMS-mutant culture of Bacillus subtilis in a lab scale bioreactor and shake flasks. The laboratory scale bioreactor of 7.5 L capacity was employed for the microbial cultivation experiments in addition to 250ml Erlenmeyer flasks. The parental strain of Bacillus subtilis was improved ...

Epiphyseal chondrocytes cultured in a medium containing 10% serum may be maintained as three dimensional aggregates and differentiate terminally into hypertrophic cells. There is an attendant expression of genes encoding type X collagen and high levels of alkaline phosphatase activity. Manipulation of the serum concentration to optimal levels of 0.1 or 0.01% in this chondrocyte pellet culture s...

The kinetics of the oxidation of ruthenium(III) (Ru(III)) catalyzed oxidation of L-tryptophan (L-trp) by diperiodatocuprate(III) (DPC) in aqueous alkaline medium at a constant ionic strength of 0.20 mol dm -3 was studied spectrophotometrically. The reaction between L-tryptophan and DPC in alkaline medium in presence of [Ru(III)] exhibits 1:4 stoichiometry (L-trp:DPC). The reaction was of first ...

Cultures (NCTC-designated) of kidney cells of Cercopithecus aethiops were grown in a chemically defined medium (NCTC-135) and were then examined morphologically and cytochemically. Comparisons were made with cultures of the same cell line in medium supplemented with either 10% fetal-calf or 10% horse sera. The epitheloid cells of the serum-free cultures demonstrated only a slight difference in ...

Corrosion of Aluminum metal at pH 10 has been controlled by dicarboxylic acids such as oxalic acid (OA) and adipic (AA).The Inhibition efficiency (IE) determined the classical weight loss method. The maximum inhibition offered (AA) 250 ppm Zn2+ 50 system are 88 96%. To determine values Linear Polarization Resistance (LPR) corrosion Current (Icorr), potentiodynamic polarization study used.

Flotation wastes are becoming a valuable secondary raw material and source of many metals semimetals worldwide with the possibilities industrial recycling. The flotation tailings contain oxide sulfide minerals that have not been sufficiently stabilized form acidic mine waters, which in turn contaminate groundwater, rivers, reservoi6sediments. An effective way to recycle these is recover through...