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Articles by A. Amir
Total Records ( 3 ) for A. Amir
  N. Kapoor , A. Arya , M.A. Siddiqui , A. Amir and H. Kumar
  Accelerated ageing test were made in five chickpea varieties viz., three desi (Pusa 256, Pusa 212 and BGD 72) and two kabuli (Pusa 267 and K551) with the objective of studying sequence and relationship of process of deterioration over short periods. All the varieties were investigated to consider whether there are cultivars differences for tolerance to ageing conditions. In the study, effect of accelerated ageing on seed viability, seedling vigour and biochemical process were explored. The overall results showed that seed quality in chickpea deteriorates following accelerated ageing treatment. All the physiological parameter viz., germination percentage, seedling root length, shoot length and consequently the vigour index in all varieties were significantly decreased. An increase in moisture content was observed during ageing. Decrease in seed viability and germination rate, vigour is also correlated with biochemical changes (decreased soluble proteins and sugar content) associated with seed ageing. The study also exhibited differential responses among varieties with respect to ageing. All the test experiments performed concluded that Pusa 256 is the best variety, followed by K 551 among all five varieties and Pusa 212 is highly sensitive variety with respect to accelerated ageing.
  S.J.H.M. Yusof , M.S. Takriff , A. Amir , H. Kadhum , A.W. Mohammad and J. Jahim
  The addition of organic acids to the growth medium has been shown to stimulate solvent production and protect against the degeneration of ABE-producing clostridia. The objective of this study is to demonstrate the effect of introduction of butyric acid in the fermentation media on the solvent production by C. acetobutylicum NCIMB 619. In this study, batch cultures were carried out in Reinforced Clostridial Media (RCM) containing 0.0015 and 2.0 g L-1 of butyric acid, simultaneously with a control media (without addition of butyric acid) at 37°C for 72 h. It was found that the presence of butyric acid during the early stage of the fermentation process favor the solvent yield to glucose utilization up to 71%. By adding butyric acid, the concentration of acetone and butanol generated was improved significantly. In the case of 2.0 g L-1 butyric acid addition, acetone and butanol production was increased approximately 5 and 1.6 folds, respectively compared to control culture. The result obtained in this study showed that the addition of butyric acid not only promoted solvent production, but also induced butanol production at the initial stage of fermentation by C. acetobutylicum NCIMB 619.
  N. Kapoor , M. Tyagi , H. Kumar , A. Arya , M.A. Siddiqui , A. Amir and A.S. Malik
  The aim of the present study was production of cellulase enzyme using wheat straw as substrate from Chateomium sp. under Solid State Fermentation (SSF) condition. The culture parameters, such as duration of incubation, incubation temperature, pH, carbon and nitrogen sources and additives, were optimized for enhancing cellulase yield. The optimal level of each parameter for maximum cellulase production by the fungus was determined. Results showed that cellulase production was highest with wheat straw containing production medium supplemented with sucrose, malt extract and CaCl2 and the incubation temperature, time and pH were 35°C, 3rd day and 6.5, respectively. The importance of cellulase enzyme in industries cannot be over emphasized. The crude enzyme when purified may serve the importance of this enzyme in both refining and deinking of recycled papers.
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