HARRIS et al.1), observing ultrastructural changes in rapidly frozen fowl spermatozoa, noted destructive effects on the acrosome, the midpiece, and the cytoplasmic membrane. Similar ultrastructural damages were seen by BAKST and SEXTON2) in frozen-thawed fowl and turkey spermatozoa under transmission and scanning electron microscopes. However, they gave little information on the possible mechan...

The present work aimed at studying growth pattern and carcass traits in pearl grey guinea fowl fed on dietary Neem (Azadirachta indica) leaf powder (NLP) over a period of 12 weeks. Day old guinea fowl keets (n=120) were randomly assigned to four treatment groups, each with 3 replicates. The first treatment was designated as control (T0) in which no supplement was added to the feed, while in tre...

metadiscourse markers help writers make coherent and reader- friendly texts, thus of considerable importance in academic writing. the main aim of this study was to investigate how interactive and interactional metadiscourse markers are used by iranian efl learners. an inquiry was carried out to investigate cross-cultural similarities and differences in the use of metadiscourse markers in the di...

R. A. FISHER (1930) developed a phylogenetic and statistical theory of dominance of wild type over mutants involving a selection of modifiers that shift the phenotype of the heterozygous mutant toward the wild type. The wild type has a selective advantage which also is conferred upon heterozygotes. FISHER (1 934,1935,1938) noted that many common mutations in the domestic fowl were dominant in c...

Pupil responses triggered by specific stimulus attributes such as spatial structure, colour and light flux changes were measured in eight domestic fowl. Comparative experiments were also carried out in human subjects. The results were unexpected in that large increments in light flux caused only small constrictions of the pupil. A red stimulus, on the other hand, caused a relatively large pupil...

to finding out the genetic structure of iranian native horses, as animal blood samples were obtained from diverse areas of iran, in addition, 114 sequences of equine d-loop region were obtained from genbank. total dna of the samples were extracted through salting out procedure and utilized as template for amplification and sequencing of the d-loop region of mtdna. sequence analysis of the 247-b...

Silky fowl, a breed of chicken, is hyperpigmented in its various internal tissues. The pigment was extracted from various tissues of two strains of Silky fowl to determine its molecular structure and internal distribution. Analysis by infrared spectroscopy showed two spectrum patterns of the pigment in Silky fowl; one is from ovary and testis, the other is from periosteum and feather. The diffe...

C/O specific pathogen-free White Leghorn chickens were intracerebrally inoculated at one day of age with a brain homogenate of Japanese bantams (Gallus gallus domesticus) affected with fowl glioma. Histologically, six of eight inoculated chickens developed nonsuppurative meningoencephalitis in cerebrum and two of them had the characteristic lesions of fowl glioma. Hyperplastic lymphoid foci con...

Pasteurella multocida subspecies multocida is the most common cause of fowl cholera, although P. multocida subspecies septica and gallicida may also cause fowl cholera-like disease to some extent. However, the virulence properties of the different subspecies for various hosts have not been elucidated. The severity and incidence of P. multocida infections may vary considerably depending on sever...