M.Sc.

Ninety one samples were collected from different clinical and environmental sources to isolate cholesterol oxidase producing Pseudomonas sp. , from these samples, 110 isolate were obtained, sixty of them were belong to Pseudomonas sp. Since they have the ability to grow on citrimide agar medium. Results of screening of these isolates for cholesterol oxidase production showed that Pseudomonas sp. H48 was the most efficient among the tested isolates in enzyme production since the activity of crude enzyme in culture filtrate was 1.71 U/ml.

In an attempt to enhance heavy metal tolerance in tissue cultures and intact plant of S. grandiflora.

In wireless sensor networks (WSNs), many sensor nodes which have limited energy sense the environment and relay their packets to the sink node by multi-hop routing. Thus, the nodes closest to the sink consume more energy than the other nodes and this ends up their lifetime early, which affect the overall network lifetime. Among several techniques of improving the performance of a WSN, the controlled mobility technique is commonly used for some of the network nodes and considered as one of the most important.