The production of methyl esters (biodiesel) by the transesterification Podocarpus falcatus oil (PFO) with methanol was optimized response surface methodology (RSM) using Box-Behnken design. effects parameters such as temperature, reaction time, and alcohol/oil molar ratio yield viscosity responses were investigated. optimum conditions for biodiesel follows: temperature at 65°C, time 180 min, 10...

To funistic survey of the cercariae of Melanoides tuberulata (fresh water snail) 1540 M.tuberculata were collected from various streams, swamps, ditches and canals in the central area of Khouzestan province in the south west of Iran. Infected snails, 46 (2.9%), were isolated and cercariae were obtained by emerging or crushing methods and then measuring and drawing were made from specimens. In s...

Piscivory is a common trophic niche among cichlids of the East African Great Lakes, including Lakes Edward and George. From these two lakes, we examined taxonomic diversity cichlid species with piscivorous morphology. Prior to this study, were formally described, Haplochromis squamipinnis H. mentatus. We redescribe both describe an additional ten new morphology: latifrons sp. nov., rex simba gl...

Understanding the interaction between TCP and MAC layer protocols in satellite networks is critical to providing high levels of service to users. We separate our study of TCP and MAC layer protocols into two parts. We consider the problem of scheduling at bottleneck links and propose two new queue management algorithms. They are capable of offering higher levels of fairness as well as lower lat...