The study examined the reproductive indices of albino and normal pigmented Clarias gariepinus fish from Katsina (KT) Yola (YY), carried out under hatchery condition. experiment compared fecundity, testes, milt volume, percentage fertilization hatchability (AA) (NN) (YY). Normal C. had highest number eggs (229,240), followed by YY (127,250) least was recorded in Albino (124,750). weights lengths...

Mouse and hamster spermatozoa from the cauda epididymidis were deposited into the female tract at various periods following ligation of the corpus epididymidis. It was found that the number of spermatozoa in the cauda epididymidis decreased sooner in the hamster than in the mouse but the initial decrease in fertilizing ability occurred much earlier in the mouse than in the hamster. The fertiliz...

DNA lesions, cytotoxicity, and cellular uptake of CaCrO4 were com pared in Chinese hamster ovary, in mouse embryo fibroblast C3H10T'/2, and in human osteosarcoma cells. The concentration of CaCrO4 that reduced colony formation by 50% was 2or 3-fold less in human osteo sarcoma cells than in C3H 10T'/2 or Chinese hamster ovary cells. Alkaline elution studies showed that CaCrO4 induced DNA single ...

background: irradiation is one of the major causes of induced sperm dna damage. various studies suggested a relation between sperm dna damage and fertilization rate after intra-cytoplasmic sperm injection (icsi). objective: in this study, fertilization rate and premature chromosome condensation (pcc) formation after icsi of hamster oocytes with irradiated sperms from normal and oligosperm indiv...

background: transient gene expression (tge) gained popularity over the last decade as a rapid method for the production of milligram to gram quantities of recombinant proteins for preclinical studies in biophama industry. thereby, the optimization of the tge technique for chinese hamster ovary (cho) as the dominant host for the production of biotherapeutics is of great interest to reach the val...

objective: development of high producing mammalian cell lines is a major bottleneck in manufacturing of recombinant therapeutic proteins. this study examines the effect of using the matrix attachment region from the human interferon beta gene in combination with promoter activation strategy with e1a 13s protein on human tissue plasminogen activator (t-pa) expression in chinese hamster ovary (ch...

A number of attempts have been made to grow albino plants by means of artificial nutrition, but so far as I am aware, in none of these have plants been grown to maturity or with any material gain in dry weight. KNUDSON and LINDSTROM (6) succeeded in keeping albino maize plants alive when supplied with sugar, and noted the formation of five to seven leaves, while the check plants had only two to...

Green, Dowling, Siegel and Ripps (1975) J. gen. Physiol. 65, 483-502 found that both receptors and post-receptoral elements regulate the process of light adaptation in skate retina. As a test of the generality of this conclusion, we repeated their experiments on the retina of the intact albino rat. Increment threshold and intensity-response functions of aspartate-isolated receptor potentials, E...