Enzymatic bleaching of kraft pulp by xylanase from Aspergillus sydowii SBS 45.

Crude xylanase from Aspergillus sydowii SBS 45 was tested for enzymatic bleaching of kraft (Decker) pulp. After optimization of three parameters, consistency of pulp, retention time and enzyme dose, considerable increase in the release of UV and visible absorbance spectra of materials and reducing sugars was observed, which clearly indicated the action of xylanase on pulp. Final brightness of pulp was increased from 29.

Accumulation of intracellular polyhydroxybutyrate in Alcaligenes sp. d(2) under phenol stress.

Alcaligenes sp. d(2) isolated from soil was earlier reported as a potent phenol-degrading organism. In the Fourier transform/infrared spectroscopic analysis of the biodegraded sample, the aromatic stretching was missing and the spectrum gave evidence for the presence of polyhydroxybutyric acid along with its depolymerized products.

Purification and biochemical characterization of two xylanases from Aspergillus sydowii SBS 45.

Two xylanases were isolated and purified from crude culture filtrate of Aspergillus sydowii SBS 45 after 9 days of growth on wheat bran containing 0.5% (w/v) birch wood xylan as the carbon source under solid-state fermentation. After a three-step purification scheme involving ammonium sulfate precipitation, gel filtration chromatography (Sephadex G-200), and anion exchange chromatography (DEAE-Sephadex A-50), xylanase I was purified 93.

Treatment of paper factory effluent using a phenol degrading Alcaligenes sp. under free and immobilized conditions.

Treatment of the paper factory effluent was done with free and immobilized cells of a phenol degrading Alcaligenes sp. d(2). The free cells could bring a maximum of 99% reduction in phenol and 40% reduction in chemical oxygen demand (COD) after 32 and 20 h of treatment, respectively.

Pulmonary function in patients with diabetes mellitus.

The present study was carried out to assess the lung functions in oral medicated and insulin administered patients with normal controls. 20 subjects were selected as the study group for oral medication (Group I), 20 subjects were selected as the study group for insulin treatment (Group II) and 40 subjects were selected as normal controls. Age group of Group I and Group II were 51.

Effect of oral contraceptives on respiratory function.

The present study was carried out to assess the lung functions in oral contraceptive administered women. Lung function tests were carried out with Spirometer (Vitallograph Compact II). A significant increase in vital capacity (VC) was observed in these women as compared to normal control.