Tajalli Keshavarz

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Plants show physiological and morphological responses to a range of physical and chemical factors known as 'elicitors'. These responses have been considered as defence reactions 'elicited' by the plants' biochemical factory to ensure their survival, persistence and competitiveness. Recently examples have been cited of elicitation in some fungal and(More)
A newly characterised Bacillus strain, Bacillus cereus SPV was found to produce PHB at a concentration of 38% of its dry cell weight in shaken flask cultures, using glucose as the main carbon source. Polymer production was then scaled up to 20 L batch fermentations where 29% dry cell weight of PHB was obtained within 48 h. Following this, a simple glucose(More)
Production of polyhydroxyalkanoates (PHAs) has been investigated for more than eighty years but recently a number of factors including increase in the price of crude oil and public awareness of the environmental issues have become a notable driving force for extended research on biopolymers. The versatility of PHAs has made them good candidates for the(More)
Use of carbohydrates as elicitors is a novel technique for enhancement of the production of industrially important microbial products. The relation between the levels of ROS (reactive oxygen species) and overproduction of antibiotics in microbial cultures has already been established. In the present study, we aimed to exploit the ROS response to develop a(More)
This work proposes a novel approach for enhancing the yield of lovastatin in Aspergillus terreus cultures by exploiting linoleic acid-derived signalling molecules, which are potentially involved in fungal cell–cell communication. High-performance liquid chromatography analysis revealed that production of lovastatin was enhanced up to 1.8-fold upon exogenous(More)
The role of oligosaccharides as biotic elicitors for the enhanced production of antibiotics and enzymes has been established in recent years. These findings could have significant promise for the pharmaceutical and biotechnology industries. Before the elicitors could be used at large-scale, reproducible production and high levels of enhancement are(More)
In this study, azo dye adapted mixed microbial consortium was used to effectively remove colour from azo dye mixtures and to simultaneously generate bio-electricity using microbial fuel cells (MFCs). Operating temperature (20-50 °C) and salinity (0.5-2.5%w/v) were varied during experiments. Reactor operation at 50 °C improved dye decolourisation and COD(More)
Because of the growing demand for renewable fuels, the production of butanol through acetone-butanol-ethanol (ABE) fermentation of lignocellulosic biomasses is attracting more and more research interest. The major limit for an industrial-scale production of bio-butanol is the high separation cost, due to the presence of other fermentation products and to(More)
Elicitation can lead to overproduction of secondary metabolites in plants and microbes. Potential changes in cytosolic Ca2+ levels in bacteria were studied in response to elicitation. We report, for the first time, the effect of oligosaccharide elicitors on intracellular Ca2+ levels. The apoaequorin gene was cloned into Escherichia coli DH5α and Bacillus(More)
Butanol Production from Lignocellulosic-based Hexoses and Pentoses by Fermentation of Clostridium Acetobutylicum Francesca Raganati, Sebastian Curth, Peter Götz, Giuseppe Olivieri, Antonio Marzocchella Chemical Engineering Department Università degli Studi di Napoli Federico II, P.le V. Tecchio 80, 80125 Napoli – Italy Department of Life Sciences and(More)