Lake Burullus is one of the vulnerable Egyptian coastal lakes suffering from high level of aquatic plant, over fishing, expansion in fish farming and agricultural drainage discharges and increasing of human activities. Eutrophication in water bodies of the lake is associated with growth of the different hydrophytes which have direct effects on Euro-Asian Palaearctic migrants passing Egypt. The ...

Partially protected glycosyl donors are extremely useful reagents for oligosaccharide synthesis allowing more facile deprotection and enhanced activity due to lower steric restraints. A partially protected fucosyl donor containing tert-butyldimethylsilyl (TBDMS) protecting groups was activated under bromine-silver triflate conditions in the presence of primary alcohols and found to give difucos...

Esters of proteinogenic amino acids efficiently catalyse the formation of erythrose and threose under potentially prebiotic conditions in the highest yields and enantioselectivities yet reported. Remarkably while esters of (L)-proline yield (L)-tetroses, esters of (L)-leucine, (L)-alanine and (L)-valine generate (D)-tetroses, offering the potential to account for the link between natural (L)-am...

There has been considerable interest in developing methods for rapid and sensitive detection of biological molecules such as DNA and proteins in biodefense and drug-discovery applications. Fluorescence-based optical-detection methods are widely used in various settings, but these methods require labeling of the target molecules and generally exhibit a relatively low detection sensitivity and th...

Lake Burullus is one of the vulnerable Egyptian coastal lakes suffering from high level of aquatic plant, over fishing, expansion in fish farming and agricultural drainage discharges and increasing of human activities. Eutrophication in water bodies of the lake is associated with growth of the different hydrophytes which have direct effects on Euro-Asian Palaearctic migrants passing Egypt. The ...

Most experimental studies of senescence have been done with short-lived organisms under controlled laboratory conditions and it is not clear whether the insights gained from these studies can be broadly generalized. This study was designed to detect senescence in a natural population and to compare the patterns of mortality for a single species in natural and protected conditions. It was done w...