The present study was aimed to find out the ability of the marine cyanobacterium Oscillatoria boryana BDU 92181 to produce H 2 O 2 and to optimize its photoproduction with a view to harness its potential for decolorization of distillery effluent. The organism decolorized distillery effluent (5% V/V) by about 60% in 30 days. The mechanism of decolorization is postulated to be due to the production of hydrogen peroxide and molecular oxygen released by the cyanobacterium during photosynthesis. The effects of light intensity as well as different enhancers and inhibitors on the production of H 2 O 2 in this organism were studied. Our results showed that, riboflavin and MnSO 4 positively influenced H 2 O 2 production. Sodium metabisulphite and potassium cyanide inhibited H 2 O 2 production.
To determine the most efficacious midstorage hydration-dehydration treatment for preservation of vigour and viability of stored pea seeds {Pisum sativum L.), cultivar Bonneville, three methods viz., soaking-drymg, moisture equilibration-drying and moist sand conditioning-drying each at varying durations were evaluated. Irrespective of the durations of treatment, soaking-drying proved injurious. Though all durations of moisture equilibration excepting 72 and 120 h outperformed the control, yet 48 h proved to be the best. Preconditioning with moist sand (5 % moisture content) with seed at a ratio of 1 : 2.5 for different durations revealed 48 h to be the optimum, 72-96 h to be innocuous and thereafter injurious. Maintenance of membrane integrity and counteraction of lipid peroxidation may be the possible reasons for such beneficial effects.
Increased population growth, industrialization, and modern culture create a variety of consequences, including environmental pollution, heavy metal accumulation, and decreasing energy resources. This perilous position necessitates the development of long-term energy resources and strategies to address environmental threats and power shortages. In this study, an investigation into the use of castor seed oil cake and waste tyres as a feed material for the copyrolysis process for yielding maximum oil production was performed. The copyrolysis experiments were performed by changing the mass percentage of waste tyres with oil cake to make different ratios of 100 : 0, 75 : 25, 50 : 50, 25 : 75, and 0 : 100. At 50 : 50 ratio, the maximum positive synergy on oil production was obtained. At that condition, a maximum of 59.8 wt% oil was produced and characterized to analyze its physiochemical properties. The coprocessing of the selected two feed materials enables the stabilization of the oil, as the produced oil has a lower oxygen content with a maximum heating value of 38.72 MJ/kg. The Fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectrometry (GC-MS) analysis of the oil showed the existence of aromatic hydrocarbons and phenolic elements. Adding waste tyres to the biomass improved the quality of the oil by increasing carbon content with reduced oxygen content.
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