Ground water sources in some part of Ethiopia contain nitrate level beyond the permissible limit which can cause public health problems. Hence, the concentration of nitrate in drinking water should be removed to prevent ...

The purpose of this thesis was to study phonon assisted and zero phonon radiative lifetimes of electron-hole pair which are excited and recombine inside nc-Si, on the basis of more realistic assumption of finite potential ...

Studies on zooplankton community grazing rates were done in Lake Kuriftu from July 2005 to April 2006 using food removal method with chlorophyll ‘a’ as algal food indicator. The study considered the main factors that ...

Zooplankton community grazing rates as percentage of algae cleared per day (%G/d) were determined in Lake Arsedi by in-situ feeding experiments (with changes in chlorophyll a concentration method) using 1 l incubation ...

Studies on . the species composition, age struc.ture, sex ratio, pattern of abundance and measu~ement of~body sizean4 brood s'ize was performed on the zooplankton community in Lakes ,.?:;:/j'/:~~-<-<' '-' -,; .. ';--'-~'" ...