Vasconcelos joanna (9 risultati)

First Edition. 31 x 25 cm 239 pp with colour illustrations throughout. Spanish and English text. Hbk. a few corners lightly bumped o.w. fine.

Condizione: New.

Condizione: New.

Taschenbuch. Condizione: Neu. Studies on Equine Sperm Cryopreservation | Joanna Sousa de Vasconcelos Franco | Taschenbuch | 160 S. | Englisch | 2018 | LAP LAMBERT Academic Publishing | EAN 9786137342695 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.…

Paperback. Condizione: Brand New. 160 pages. 8.66x5.91x0.37 inches. In Stock.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The use of frozen stallion spermatozoa for artificial insemination is increasing in the equine industry. Unfortunately, the fertilizing capacity of cryopreserved stallion semen is generally considered to be lower than that of some other domestic species. Several different freezing regimes with new protocols and extenders have been designed and published to improve the quality of post-thaw equine semen; however, no ideal protocol for all cases exists. Therefore, the aim of this research was to improve stallion cryopreservation. It has been hypothesized that the addition of antioxidants ( -tocopherol and ascorbic acid) in the freezing extender and the use of different freezing rates (FRs) might yield increased cryosurvival of spermatozoa. Sperm's physiological and metabolic studies were also evaluated, in order to understand the mechanisms by which cryopreservation can alter sperm function, and to improve the quality of post-thaw equine semen. Moreover, the study also aimed to prove that the heterologous in vitro fertilization (IVF) can predict male fertility, validating a new approach for a heterologous IVF assay using bovine oocytes with zona pellucida (ZP) intact and equine sperm.…

Condizione: New. Print on Demand.

Condizione: New. PRINT ON DEMAND.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The use of frozen stallion spermatozoa for artificial insemination is increasing in the equine industry. Unfortunately, the fertilizing capacity of cryopreserved stallion semen is generally considered to be lower than that of some other domestic species. Several different freezing regimes with new protocols and extenders have been designed and published to improve the quality of post-thaw equine semen; however, no ideal protocol for all cases exists. Therefore, the aim of this research was to improve stallion cryopreservation. It has been hypothesized that the addition of antioxidants (¿-tocopherol and ascorbic acid) in the freezing extender and the use of different freezing rates (FRs) might yield increased cryosurvival of spermatozoa. Sperm's physiological and metabolic studies were also evaluated, in order to understand the mechanisms by which cryopreservation can alter sperm function, and to improve the quality of post-thaw equine semen. Moreover, the study also aimed to prove that the heterologous in vitro fertilization (IVF) can predict male fertility, validating a new approach for a heterologous IVF assay using bovine oocytes with zona pellucida (ZP) intact and equine sperm.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 160 pp. Englisch.…