• Title/Summary/Keyword: chick

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Pre-equilibrium in the Schmidt Reaction of Benzhydrols (Benzhydrol 類의 Schmidt 反應에 있어서의 Pre-equilibrium)

  • Pyun, Hyung-Chick
    • Journal of the Korean Chemical Society
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    • v.8 no.1
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    • pp.25-29
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    • 1964
  • Benzhydryl azide 類에 Benzhydrol 類를 混合하여 Schmidt 反應을 逐行할 때에 Benzhydryl 基 間에 完全한 Radical exchange 現象이 일어남을 알았다. 故로 Benzhydrol 類의 Schmidt 反應에 있어서는 一但 生成된 Benzhydryl azide가 濃硫酸存在下에서 Benzhydryl cation과 Hydrazoic acid로 分離되어 完全平衡狀態에 있음을 確認할 수 있었다.

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Sex-linked Dwarf Gene for Broiler Production in Hot-humid Climates

  • Islam, M.A.
    • Asian-Australasian Journal of Animal Sciences
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    • v.18 no.11
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    • pp.1662-1668
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    • 2005
  • This review has been done to examine sex-linked dwarf gene in broiler production in hot-humid climates. Introduction of sex-linked dwarf gene especially in hot harsh tropical environments brings a great advantage for broiler production. The heavy broiler parent suffers due to the stress of these adverse climates. Sex-linked dwarf genes reduce body weight, egg weight, but are superior for adaptability under harsh tropical environments, with a lower requirement for housing and feed, better survivability and reproductive fitness giving fewer defective eggs, more hatching eggs, better fertility, hatchability, feed conversion efficiency and resistance to disease. Overall the cost of chick production from dwarf hens is lower than from their normal siblings. Market weights of broilers from sexlinked dwarf dams is almost similar to those of broilers from normal dams with normal sires. But the net benefit of broiler production from sex-linked dwarf dams is found to be greater than that of broilers from normal dams. This will be the most important to the rural communities in Bangladesh and in other countries where the similar environment and socio-economic conditions exist. Therefore, sexlinked dwarf hens might be used in broiler breeding plan as well as broiler production in the tropics.