Browsing by Author "ALVAREZ JÚNIOR, Roberto Aparecido"

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Ações biológicas das prostaglandinas na reprodução de fêmeas bovinas
(Centro Universitário da Fundação de Ensino Octávio Bastos, 2004-09-30) ALVAREZ JÚNIOR, Roberto Aparecido; TUNIN, Adriana Maria Favaro; ROSAS FILHO, Adauto de Carvalho
Prostaglandins are members of a large family of endogenous compounds, known as eicosanoids, derived from oxygenated fatty acids, unsaturated and synthesized in most mammalian tissues. The fact that concentrations increase during childbirth or abortion confirms the participation of this hormone in these processes. PGF associated with oxytocin causes myometrial contraction and PGE due to its spasmodic action on the anterior portion of the uterus, has a relaxing effect on the cervix. They are likely to participate in addition to uterine contraction, with events such as the occlusion of the umbilical vessels and the closure of the venous arterial duct.
Algumas considerações sobre a eficiência produtiva de vacas leiteiras de alta produção
(Centro Universitário da Fundação de Ensino Octávio Bastos, 2004-09-30) ALVAREZ JÚNIOR, Roberto Aparecido; VILLARRETA, Elias Tunon
The objective of this literature review is based on data from the researched literature regarding the economic efficiency of high production dairy cows, to discuss postpartum efficiency data due to the higher negative energy balance, first postpartum heat, pregnancy rates, heat silent, increased incidence of double ovulations, altered levels of progesterone, estrogen, IGF -1, luteinizing hormone and embryonic death.
Efeitos do tratamento com prostaglandina (PGF) no pós parto em bovinos
(Centro Universitário da Fundação de Ensino Octávio Bastos, 2004-09-30) TUNIN, Adriana Maria Favaro; ALVAREZ JÚNIOR, Roberto Aparecido; HUCKE, Erica E. T. S.
Uterine involution means the reduction of the size of the uterus with recovery of its functions after delivery. This action seems to depend on the release of prostaglandin (PGF), which accelerates the process, stimulating the myometrium. This substance is normally produced by the uterus, being responsible for the correct postpartum uterine involution in normal time. Delay in uterine involution can result in retained placenta with important health consequences and the return of normal cycling activity, leading to economic losses. The use of PGF in the postpartum period can help to avoid such problems, however its efficiency can still be questioned.
Mecanismos endócrinos envolvidos no reconhecimento materno do embrião em bovinos
(Centro Universitário da Fundação de Ensino Octávio Bastos, 2004-09-30) ALVAREZ JÚNIOR, Roberto Aparecido; TUNIN, Adriana Maria Favaro; MATURANA FILHO, Milton; VILLARRETA, Elias Tunon
The purpose of this literature review is to describe the antiluteolytic mechanism estimated by the conceptus. It is known that interferon-tau is secreted by the bovine embryo in order to suppress the synthesis of prostaglandin (PGF) from epithelial cells in order to maintain pregnancy. The mother's endocrine mechanisms are also responsible for the development of the embryo, in which the production of progesterone by the corpus luteum stands out.