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Animal Science Database

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Abstract

Objective: To evaluate effect of tris-extender supplemented with various concentrations of strawberry (Fragaria spp.) on bull semen preservability. Methods: Pooled bull semen were extended with tris-citrate-fructose egg yolk diluent (control, 0% strawberry) and various concentrations of tris...

Author(s)
El-Sheshtawy, R. I.; El-Nattat, W. S.
Publisher
Hainan Medical University, Haikou, China
Citation
Asian Pacific Journal of Reproduction, 2018, 7, 2, pp 93-96
Abstract

Objective: To explore the effect of BHT on cattle spermatozoa during cooling and cryopreservation. Methods: Pooled bull semen were diluted by Tris-Citrate-Fructose egg yolk (TCFY) diluent considered as control (0 BHT) and different concentrations of BHT (1.0, 2.0, 3.0, 4.0, 5.0 and 6.0 mM) were...

Author(s)
El-Sheshtawy, R. I.; El-Nattat, W. S.; El-Sisy, G. A.
Publisher
Hainan Medical University, Haikou, China
Citation
Asian Pacific Journal of Reproduction, 2017, 6, 2, pp 77-80
Abstract

Objective: To investigate the effect of various concentrations of soybean lecithin as an alternative for egg yolk in bull semen extender on post-chilling and post-thaw sperm quality characteristics. Methods: Semen ejaculates were collected from three mature bulls' once/week for 5 weeks. After...

Author(s)
El-Sisy, G. A.; El-Nattat, W. S.; El-Sheshtawy, R. I.; El-Maaty, A. M. A.
Publisher
Hainan Medical University, Hainan, China
Citation
Asian Pacific Journal of Reproduction, 2016, 5, 6, pp 514-518
Abstract

The activity of sperm cells after thawing depends on the ratio of reactive oxidant species and antioxidant system. The aim of the present study was to evaluate the effect of catalase (alone or combined with tryptophan as antioxidants) added to the extender on the livability of cryopreserved cattle...

Author(s)
El-Sheshtawy, R. I.; El-Nattat, W. S.; Sabra, H. A.
Publisher
IDOSI Publications, Dubai, United Arab Emirates
Citation
Global Veterinaria, 2013, 11, 3, pp 280-284
Abstract

The resazurin reduction test (RRT) depends on the ability of metabolically active cells to reduce the resazurin dye to resorufin. In the current study, spectrophotometric evaluation of resazurin reduction test (RRT) to assess the color changes of resazurin reduction in butanol extracted color was...

Author(s)
El-Battawy, K. A.; El-Nattat, W. S.
Publisher
IDOSI Publications, Dubai, United Arab Emirates
Citation
Global Veterinaria, 2013, 11, 6, pp 767-770
Abstract

Objective: To explore the effect of silymarin on bull spermatozoa during cooling and cryopreservation. Methods: Pooled bull semen were diluted by Tris-Citrate-Fructose egg yolk diluents, purified silymarin powder (obtained from the milk thistle silybum marianum), purchased from Unipharma, Al Obour...

Author(s)
El-Sheshtawy, R. I.; El-Nattat, W. S.
Publisher
Hainan Medical University, Haikou, China
Citation
Asian Pacific Journal of Reproduction, 2017, 6, 2, pp 81-84
Abstract

The aim of the present study was to detect the sperm characteristics variations among different buffalo bulls in each stage of cryopreservation and study the correlation between those parameters and the conception rate. This study was carried out on four healthy buffalo bulls. Semen was collected...

Author(s)
El-Sisy, G. A.; El-Sheshtawy, R. I.; Mohamed, A. A.; El-Nattat, W. S.
Publisher
IDOSI Publications, Faisalabad, Pakistan
Citation
Global Veterinaria, 2010, 5, 1, pp 15-21

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