the experiment was carried out in poultry experimental station belonging to nrc, cairo, egypt. a total of 120 fayoumi layers, 45 weeks old, were randomly divided into four equal groups. each group included three replicates (10 hens in each). the first group was fed the control diet containing 3.3% gram ca, whereas, the other three received diets containing 2.8, 2.6 and 2.4% gram ca, respectivel...

the study was conducted to determine the effects of turkey (meleagris gallopavo)egg weight on certain egg traits and hatching performance. a total of 178 turkey eggs comprising of three different egg weight groups below 60 g (g i), 61 to 69 g (g ii) and above 70 g (g iii) were used for this study. average egg weight (g), egg length (cm), egg breadth (cm) and egg volume (cm3) values increased wi...

Egg cells of the pond snail Lymnaea stagnalis were isolated and reared in an inorganic medium, in which they readied the blastula stage with the same rate and yield as in the egg capsules. Syn­ chrony of cell division was 70 — 90% depending on temperature and number of cell division. 3H-leucine incorporation into hot TCA-insoluble material as a function of developmental stage was studied by aut...

As a result of impressive progress that made in economic traits such as body weight gain, feed efficiency and breast yield to meet the demands of consumers, nowadays, poultry became more susceptible to obesity, stressors and less ability to resist the common diseases in commercial farms. L-Arginine (L-Arg) supplementation in poultry diets improves egg production, egg weight, modulates lipid met...

The faecal egg count reduction (FECR) in faeces is the most widely used method to assess the efficacy of anthelmintics against gastrointestinal strongyles. Several methods are used and they yield different efficacy values. They give important weight to those animals which excrete the majority of eggs, before or after treatment. We propose using individual animal FECR tests that give equal weigh...

The present study was initiated as an attempt to evaluate the usefulness of the cellulose ion exchange agents for peptide chromatography. Since these techniques are of immediate application to the determination of amino acid sequence, different groups of peptides from the same protein have been studied with the hope that these might yield sufficient information to permit the elucidation of the ...

Embryogenesis in the egg of the silkworm. Bombyx mori, up to 24 h after oviposition was studied by light microscopy with special reference to nuclear migration and blastoderm formation. In Bombyx eggs blastoderm cells seem to form in a mechanism different from that usually seen in many other insect species; that is, in Bombyx eggs no typical cleavage furrows were seen. Cleavage nuclei which had...

Seven separate experiments were conducted with Hy-Line W-36 hens to determine the ideal ratio of Arg, Ile, Met, Met+Cys, Thr, Trp, and Val relative to Lys for maximal egg mass. The experiments were conducted simultaneously and were each designed as a randomized complete block design with 60 experimental units (each consisting of 1 cage with 2 hens) and 5 dietary treatments. The 35 assay diets w...