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- 01/01/1994
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Get PDF由肉桂酸和氨酶法合成l-苯丙氨酸(l-PHE)的反应是热力学上不利的.因为当苯丙氨酸解氨酶(PHEnylAlAnInEAMMOnIA-lyASE,PAl)被用在具有高PH,高氨和相对高的肉桂酸浓度的环境中被认为引起PAl的快速失活.通过转化反应实验,证明氯离子和溶氧的存在是PAl真正失活的因素.天津市自然科学基金资助项
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- 10/10/2002
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Get PDF本文为武夷山自然保护区生物多样性GEF项目内容之一 ,调查了保护区内不同海拔高度的代表性森林生态系统的物种多样性 .小叶黄杨 (Buxussinicavar .parvifolia)林是中山矮曲林的代表性类型之一 .应用Shannon Wiener多样性指数、Pielou均匀度、Simpson指数和PIE对武夷山小叶黄杨群落高等植物进行了物种多样性研究 .结果表明前两者是较好的多样性指标 ,该群落的Shannon Wiener指数值为 1.80 6 8,Pielou均匀度为 49.6 7% ,Simpson指数值为 2 .9146 ,PIE为 0 .6 5 6 9.群落乔木层与藤本植物的物种多样性较高 ,前者各项指数值分别为 2 .2 312 ,71.16 % ,5 .0 783,0 .80 31;后者各项指数值分别为 1.3371,83.0 8% ,3.5 32 7,0 .716 9
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