Bioactive Metabolites from bacterial and marine origins
Hana Maalej and Asad Khan are visiting UAlg and CCMAR. In this seminar they will talk about their research.
Bioactive metabolites from bacterial and marine origins: Purification, characterization and investigation of their biological activities
10 October / Amph - 1.8 (bdg 8) / 2:00pm
Hana Maalej
University of Gabes - National School of Engineering of Sfax, Tunisia
Owing to its vast diversity of organisms and habitats, the marine world is a rich source of unique and valuable carbohydrates and carbohydrates-active enzymes, particularly, polysaccharides and α-amylases (1,4-α-D-glucanohydrolase; EC 3.2.1.1), endo-acting enzymes which randomly cleave α-(1,4) glycosidic bonds of starch polymers, resulting in oligosaccharides with varying lengths This class of enzymes is of great industrial importance in food, starch liquefaction, saccharification, detergent, brewing, paper, textile and distilling industries. Because major sources of marine enzymes are by-products, which are normally discarded as industrial waste in the process of fish processing, this study focuses on a novel α-amylase extraction and purification from crab viscera, as well as its biochemical characterization.
Point-of-Use Water Filtration Media for Removal do Endrin
10 October / Amph - 1.8 (bdg 8) / 2:45pm
Asad Khan
Department of Chemical Engineering, COMSATS University Islamabad, Lahore, Pakistan
Groundwater is an essential source of irrigation for maintaining agriculture, a lifeline of Pakistan’s economy. Punjab is the second largest and most populated province of Pakistan. Agriculture is an integral part of its economy, and the province is a major producer of cotton and wheat in Pakistan. As the uses of fertilisers and pesticides in the province have drastically increased, there are threats to groundwater and public health. There have been many reports suggesting groundwater contamination in the province with toxic pesticides. There have been many reports suggesting groundwater contamination in the province with pesticides such as endrin, endosulfan, dieldrin, lindane, heptachlor, and dichlorodiphenyltrichloroethane.
A study has been undertaken to decontaminate endrin polluted water by using a filter medium containing iron turning waste. The present talk will report the results of decontamination of water using this medium. Model solution of endrin containing 2 and 12 microgram per liter were prepared. The iron turning was used in batch as well as in column (continuous) operations. The effect of pH, iron turning loadings, a combination of sand and iron turnings has been studied. The presence of different ions, like Na, K, Mg, Ca and NO3 on the degradation of endrin is also investigated. The effect of flow rate of contaminated water is also looked at. It has been found that certain combination of the above parameter can decompose the pesticide completely.
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