relationships between egg measurements [egg weight (EGWT), egg width (EGWD), egg shape index (EGSI), egg volume (EGV) and egg density (EGD)], and egg components [eggshell (SWT), yolk (YWT) and albumen (AWT)] were investigated in laying hens with 32, 45, and 59 weeks of age with an objective of managing multicollinearity (MC), using stepwise regression (SR) and ridge regression (RR) analyses. There were significant correlations among egg traits that led to MC problems in all eggs. Hen age influenced egg characteristics and the magnitude of the correlations among egg characteristics.

A spermatic granuloma is a chronic inflammatory reaction produced in response to extravasated sperm within the intertubular connective tissue. The present study investigates the possible toxic effects of water extract of Heliotropium bacciferum on the reproductive system of male albino rats and the associated potential for the development of spermatic granulomas. H. bacciferum is a herbal plant used in traditional medicine and reported to have cytotoxic effects due to pyrrolizidine alkaloids.

Prolactin (PRL) hormone plays an important role in many biological processes in animals and humans, such as mammogenesis, lactogenesis and galactopoiesis. PRL is a single-chain protein of 199 amino acids (AA) in human, sheep, pigs and cows. The objective of the present study was to determine the polymorphism in exon 4 of PRL gene in 41 Najdi and 36 Naeimi sheep breeds of Saudi Arabia. A fragment of 156 bp of exon 4 of the Prolactin gene was amplified and sequenced. Our mutations were detected at positions (05, 109 and 127) of exon 4.

The purpose of this study was to examine the attitudes of baccalaureate degree-seeking student nurses’ attitudes toward computer usage at the College of Nursing at King Saud University (KSU), Riyadh, Saudi Arabia. Specifically, the study has been designed to investigate the influence of gender, age, socioeconomic status, academic classification, grade point average, and mandatory computer classes on students’ attitudes toward computer usage.