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Effect of melatonin and/or cysteamine on development and vitrification of buffalo embryos

Asian pacific Journal of Reproduction 2017年第4期6卷 176-180页

作者： Mohamed MM el-Sokary Mohamed el-Raey Karima GhM mahmoud mahmoud ea abou el-roos Gamal MS Sosa Department of Theriogenology Faculty of Veterinary MedicineBenha UniversityP.O:13736TokhKaliobiaEgypt Department of Anim.Reprod.&A.I. National Research CenterDokkiGizaEgypt

Objective:To assess the effects of melatonin and/or cysteamineonin vitro maturation, culturing and post-warming of buffalo ***: Buffalo oocytes were classified into control, cysteamine (50 μM), melatonin (10 ng/mL) and cysteamine (50 μM) + melatonin (10 ng/mL) treatment groups. In experiment 1, previous treatments were added duringin vitromaturation and culturing of buffalo ***:Cleavage and blastocyst rates were significantly (Peased in melatonin treated group (70.5±0.9 and 12.8±1.0, respectively). However this effect was potentiated when combined with cysteamine (74.0±1.7 and 14.8±1.7, respectively). In experiment 2, the treatements were added in maturtaion, culturing as well as post-warming culture media. Embryos at 7 d were *** assessement directly after warming showed significant increase (Peamine, melatonin and their combination groups (76.8±2.8, 80.0±2.1 and 83.3±1.7, respectively) than control (65.8±2.4);but the viability after 24 h post-warming was the best in cysteamine + melatonin combination group (61.4±2.1).Conculsions: Enriching maturation, culturing and post-warming media of buffalo oocytes and embryos with melatonin and/or cysteamine have significantly beneficial effects on oocyte developmental competence as well as embryos vitrification procedure outcomes which in turn resulting in enhancement of commercial buffalo embryo production.

关键词： Melatonin Cysteamine Buffalo Oocyte Maturation Vitrification

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A Novel Method for PID Tuning Using a Modified Biogeography-Based Optimization Algorithm

A Novel Method for PID Tuning Using a Modified Biogeography-...

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第24届中国控制与决策会议

作者： M. M. Sayed M. S. Saad H. M. Emara E. E. abou el-Zahab the department of electrical Power and Machines Cairo UniversityEgypt.

Proportional integral derivative （PID） controller tuning is an area of interest for researchers. This paper presents a novel method for PID controller tuning using a modified biogeography-based optimization（MBBO） algorithm. Biogeography-based optimization （BBO） is a novel evolutionary algorithm that is based on the mathematical models of biogeography. Biogeography is the study of the geographical distribution of biological organisms. In the BBO model, problem solutions are represented as islands, and the sharing of features between solutions is represented as immigration and emigration between the islands. In this paper, a modified version of the BBO is proposed to improve its convergence. The MBBO algorithm is compared with the BBO using benchmarks functions. The proposed algorithm is applied to the problem of PID controller tuning and is compared with conventional biogeography-based optimization （BBO）, and Particle swarm optimization （PSO）.

关键词： Process Control evolutionary algorithm (ea) Biogeography-Based Optimizationand PID controller

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