Thesiss

O objetivo deste estudo foi o de caracterizar andrologicamente a raça Campaniça de forma a melhorar as características reprodutivas adequadas à idade e, definir caracteres andrológicos importantes na escolha de reprodutores, como o perímetro escrotal, reduzindo-se a possibilidad…

The research described in this dissertation consists of four major areas: (1) sequence analysis of protamine 2 from Muroid rodents to identify potential zinc-binding domain(s) of protamine 2; (2) structural studies of the protamine 2-zinc complex from Syrian Gold hamster sperm a…

Ever increasing applications of nanomaterials (materials with one or more dimension less than 100 nm) has raised awareness of their potential genotoxicity. They have unique physico-chemical properties and so could have unpredictable effects. Zinc oxide (ZnO) and titanium dioxide…

Chemotaxis is probably a short-range mechanism because of peristaltic movements of the oviduct, which may prevent the formation of a long-range chemoattractant gradient. Following the observations that, at ovulation, a temperature difference of 1-2°C is established within the ov…

Novel isoforms of α-L-fucosidase are found in both the seminal plasma and membrane system of human sperm. Association of α-L-fucosidase with the human sperm membrane system suggests a role in fertilization. This investigation first refined the subcellular localization of membran…

Studies were conducted to examine the relationship of hen age, fertility and embryonic mortality (EM) in turkeys. Hatch residue was examined from turkey flocks at two ages. One flock was in its first two weeks of egg production and the second flock had been in production for at …