Effect of hydrogen sulphide on growth and some biochemical changes in rocket and radish plants

These experiments were a field trial which has been carried out to show the effect of H2S fumigation [0, 50 and 100 ppm] on growth and some biochemical changes in rocket and radish plants. Results showed that during the growth periods [3-6 weeks] of both rocket and radish plants, all growth parameters decreased as affected by H2S. Application of H2S decreased most of the N fractions, accumulation of sugars and biosynthesis of polysaccharides. H2S greatly reduced the activities of peroxidase, nitrate-reductase and glutamate dehydrogenase enzymes. Also H2S showed varied effects on the different amino acids

Some morphologic and physiologic responses of some plants to hydrogen sulphide

Experiments were conducted with rocket, radish and tomato seedlings to determine the effect of H[2]S at different concentrations on the growth and some biochemical changes. H[2]S induced significant inhibitory effect on radical and plumule elongation, photosynthetic activities, accumulation of soluble sugars and biosynthesis of polysaccharides. The degrees of inhibition was a function of both concentration and duration of treatment

Some morphologic and physiologic responses of tomato plants to hydrogen sulphide

Fifty and Hundred ppm of H2 were supplied to tomato plants growing under field conditions. The results indicated that all growth parameters studied decreased. The reduction became greater when concentration and/or number of treatments increased. H2S induced significant inhibitory effects on photosynthetic activities, accumulation of soluble sugars, biosynthesis of polysaccharides and most of the soluble nitrogen. H2S greatly reduced the activities of peroxidase nitrate reductase and glutamate dehydrogenase enzymes. H2S also showed effects on different amino acid levels

Determination of indomethacin in the presence of its alkaline-induced degradation products using first-derivative spectrophotometry

A rapid and direct method for the determination of indomethacin in the presence of its alkaline induced degradation products using first- derivative spectrophotometry is presented. By measuring the absolute value of the first derivative curve at the zero contribution of the degradation products [1D 340 nm], the concentration of the intact drug can be calculated directly without interference of the degradation products. Beer's law was obeyed, for intact indomethacin, in range of 2-12 mg%. The method was proved using two sets of synthetic mixtures of the intact drug with its degradation products. The mean percentage recovery was 100.2 + ' 0.86 and 99.9 =0.74, respectively. The producer is simple, rapid and allows for accurate and precise results