The efficacy of the urea dilution technique in estimating the empty body composition of pigs weighing 50 kg was evaluated in three trials using 17 contemporary (Large White X Landrace X Hampshire X Duroc) and 8 Nebraska Gene Pool X contemporary pigs. Blood samples were collected via ear catheter before infusion (-60, -30 and 0 min) and at various times (3 to 90 min) after urea infusion (2.16 mm...

The linker histones (H1 or H5) which play a key role in the folding of chromatin, are general repressors of gene expression. Nuclei of the mature chicken erythrocytes (and in some mammalian cells) contain both of them. Although the interaction of H5 with DNA is stronger than that of H1, it does not prevent the transcription of some erythroid-specific genes. It has been shown that some modificat...

BACKGROUND: Nutrients play a very important role in chemical, biochemical, physiological, metabolic, geochemical, biogeochemical, and enzymatic processes. Innovations for saving water in irrigated agriculture and thereby improving water use efficiency are of paramount importance in water-scarce regions. Conventional deficit irrigation is one approach that can reduce water use w...

This work compared the effect of ensiling technique and application of urea or a cellulase± hemicellulase enzyme mixture (FSO2) on the conservation of whole crop wheat. Awheat crop harvested at 600 g dry matter (DM) kgÿ1 was conserved with or without the application of urea (40 g kgÿ1 DM) and four levels of FSO2 (0, 1750, 3500 and 15 503 ml tÿ1 DM). Each forage (5 kg DM) was conserved in polyth...

A field experiment was designed to study the effects of nitrogen (N) source and urease inhibitor N-(nbutyl) thiophosphoric triamide (NBPT) or nitrification inhibitor dicyandiamide (DCD) on nitrous oxide (N2O) emission and N use efficiency (NUE) in a sandy loam soil. Six treatments including no N fertilizer (control), N fertilizer urea alone (U), urea plus NBPT (NBPT), urea plus DCD (DCD), urea ...

Sixty steer calves of mixed British breeding averaging 268 kg were randomly assigned to four treatment groups of 15 calves each to determine the influence of pre-fast dietary roughage content on recovery from feed and water deprivation. Three groups were fed diets containing either 84 (HR), 60 (MR) or 35% (LR) roughage at 1.75% of body weight for 3 d. Calves in these three groups were deprived ...