J
José Ferreira Nunes
Researcher at State University of Ceará
Publications - 71
Citations - 615
José Ferreira Nunes is an academic researcher from State University of Ceará. The author has contributed to research in topics: Sperm & Sperm motility. The author has an hindex of 12, co-authored 61 publications receiving 511 citations. Previous affiliations of José Ferreira Nunes include Universal Forest Products.
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Journal ArticleDOI
Effects of antioxidants and duration of pre-freezing equilibration on frozen-thawed ram semen
Diogo Ribeiro Câmara,Diogo Ribeiro Câmara,Sildivane Valcácia Silva,F. C. Almeida,José Ferreira Nunes,Maria Madalena Pessoa Guerra +5 more
TL;DR: Adding GSH, SOD or CAT did not increase the total antioxidant capacity of semen, nor did it enhance the quality of the post-thaw sperm, but maintenance of ram semen at 5 °C for 12 h prior to cryopreservation reduced membrane damage of frozen-thawed sperm.
Journal ArticleDOI
In vitro and in vivo evaluation of ram sperm frozen in tris egg-yolk and supplemented with superoxide dismutase and reduced glutathione.
Sildivane Valcácia Silva,A.T. Soares,André Mariano Batista,F. C. Almeida,José Ferreira Nunes,Christina Alves Peixoto,Maria Madalena Pessoa Guerra +6 more
TL;DR: The ultrastructural analysis revealed that the acrosome was better preserved after freezing in the SOD 100 U/ml and GSH 2 and 5 mM groups than the other groups, whereas mitochondria in both the control group and the 7 mM GSH group suffered the greatest damage.
Journal ArticleDOI
Effects of reduced glutathione and catalase on the kinematics and membrane functionality of sperm during liquid storage of ram semen
Diogo Ribeiro Câmara,M.M.C. Mello-Pinto,L. C. Pinto,O.O. Brasil,José Ferreira Nunes,Maria Madalena Pessoa Guerra +5 more
TL;DR: No significant differences were observed in progressive sperm motility throughout processing, regardless of the treatment and time of evaluation, and the supplementation of diluents with 100 and 200 U/mL of CAT prevented the harmful effects of cooling on total sperm motilty.
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Vitamin E (Trolox) addition to Tris-egg yolk extender preserves ram spermatozoon structure and kinematics after cryopreservation.
Sildivane Valcácia Silva,A.T. Soares,André Mariano Batista,F. C. Almeida,José Ferreira Nunes,Christina Alves Peixoto,Maria Madalena Pessoa Guerra +6 more
TL;DR: Results indicate that Trolox addition to Tris-egg yolk at 60 and 120μM provides greater structural integrity (plasma membrane and mitochondria) and kinematics for ram spermatozoa after cryopreservation.
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Strategies to improve the reproductive efficiency of goats in Brazil
TL;DR: The process of cooling and freezing semen, some semen extenders, the powder coconut water as an alternative semen extender, some information about artificial insemination, the artificial inSEmination technique are covered and the results of the use of extender based on coconut water in goats are presented.