The experiment of the current study was performed at Rabbitry of Poultry Science Department and the chemical analysis was carried out at Department of Animal Nutrition, Faculty of Animal Husbandry and veterinary sciences, The University of Agriculture, Peshawar. The recent study examines the effect of different level of Urea (UR) and Soybean Meal (SBM) treated groundnut shells on rabbit’s perfo...

In studies on the synthesis of urea in vitro, the nitrogen is usually supplied as NH&l or as (NHJ)$SO~ (l-3). It has been suggested that the mechanism by which such nitrogen enters the cycle and forms urea is somewhat different from that utilized by nitrogen supplied in the form of glutamine or amino acids. Leuthardt and Glasson (2) believe that ammonia from inorganic salts enters the cycle dir...

Pseudomonas aeruginosa AI 3 was able to grow in medium containing acetanilide (N-phenylacetamide) as a carbon source when NH4+ was the nitrogen source but not when urea was the nitrogen source. AIU mutants isolated from strain AI 3 grew on either medium. Urease levels in bacteria grown in the presence of urea were 10-fold lower when NH4+ or acetanilide was also in the medium, but there were no ...

Potato is a vital food source for the high hills of Nepal. The crop requires right amount nutrient at appropriate time optimal growth and production. However, low availability, cost, inappropriate timing applying nitrogenous fertilizers like urea have made it challenging farmers to use correct in their fields. Therefore, affordable renewable sources plant nutrients should be used supplement che...

All metazoan cells in culture require either arginine or citrulline for growth (1, 2). The importance of arginine is emphasized by the fact that it is rapidly depleted from the medium in many primary and established cell strains (3). The L-929 fibroblasts maintained in this laboratory and shown to harbor a pleuropneumonia-like infection also demonstrate a.n elevated requirement for this amino a...

The use of nitrification inhibitors could be an interesting alternative when applied to enhance nitrogen (N) fertilizer efficiency in annual crops such as cotton under tropical soil conditions. Thus, our aim was evaluate the inhibitor 3,4-Dimethylpyrazole phosphate (DMPP) a typical by evaluating fate (N-NO3?, N-NH4+ and total N leached water), accumulation recovery plants soil. Leaching columns...

urea is the most common form of nitrogen fertilizer used in sugar beet cultivation. urea has a high solubility and its losses are high and consequently its efficiency is low. it is supposed that urea solubility can be limited and its efficiency can be increased by using slow-release nitrogen fertilizers. by conducting an experiment in three important sugar beet cultivation areas of khorasan pro...

The level of glutamine synthetase activity in Agmenellum quadruplicatum strain PR-6 was dependent on the nitrogen source used for growth and on the nutritional status of the cells. During exponential growth, glutamine synthetase activity was low in cells grown on ammonia, urea, or nitrate. During the transition from nitrogen replete to nitrogen starved growth, glutamine synthetase activity bega...

Purified diets were offered to sheep ad libitum in two experiments. Urea was the main source of nitrogen, while energy was supplied as cellulose (20 to 72% ), starch (0 to 32% ) , or sucrose (0 to 35%) . The data indicated that (a) cellulose could serve as a suitable sole source of energy for rumen microbial synthesis, and (b) diets composed largely of cellulose, urea, and minerals could mainta...