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...

BACKGROUND The objective of this study was to analyze gallbladder stones for direct evidence of a relationship between Clonorchis sinensis infection and gallbladder stones formation. METHODOLOGY We investigated one hundred eighty-three gallbladder stones for the presence of Clonorchis sinensis eggs using microscopy, and analyzed their composition using Fourier transform infrared spectroscopy....

We have studied egg activation and ooplasmic segregation in the ascidian Phallusia mammillata using an imaging system that let us simultaneously monitor egg morphology and calcium-dependent aequorin luminescence. After insemination, a wave of highly elevated free calcium crosses the egg with a peak velocity of 8-9 microns/s. A similar wave is seen in egg fertilized in the absence of external ca...

Previous studies have shown that Xenopus egg extract can initiate DNA replication in purified DNA molecules once the DNA is organized into a pseudonucleus. DNA replication under these conditions is independent of DNA sequence and begins at many sites distributed randomly throughout the molecules. In contrast, DNA replication in the chromosomes of cultured animal cells initiates at specific, her...

Two distinctly different ATPases have been reported to be endogenous to the mitotic apparatus: a Mg2+-ATPase resembling axonemal dynein, and a Ca2+-ATPase postulated to be bound in membranes. To examine the nature of the Mg2+-ATPase, we isolated membrane-free mitotic spindles from Stronglylocentrotus droebachiensis embryos by rapidly lysing these in a calcium-chelating, low-ionic-strength buffe...

According to various reports of beneficial effects of medicinal plants on the performance of broiler chickens and less extensively studies in laying poultries, this study was conducted to find an appropriate and harmless feed additive to enhance the quality and quantity of poultry eggs. The effect of three herbal extracts on quantity and quality of eggs, blood parameters, hatchability, intestin...

A new genus of skate (Caliraja gen. nov.) is described based on egg case morphology and the number embryos per case. Caliraja nov. cases differ from those Beringraja by a combination following characteristics: relatively small in size, lacking ridges, fine striations capsule surface, moderately long horns about size compared to much larger that possess distinctly prominent no striations, short ...