Production of L - [ 3 H ] citrulline from L - [ 3 H ] arginine was measured to determine eNOS activity.

37℃暴露5min后 测定L - [ 3H ] 精氨酸产生的L - [ 3H ] 瓜氨酸量来反映eNOS活性.

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Cis , cis - 1, 4 - dibromo - 1,2 , 3,4 - tetraphenyl - 1,3 - butadiene is obtained from the reaction of 1 , 4 - dilitho - l, 2,3, 4 - tctraphenyl - l , 3 - buladicnc with carbon tetrabro - mide.

1,4-二锂-1,2,3,4-四苯基-1,3-丁二烯与四溴化碳反应生成顺, 顺 -1, 4- 二溴-1, 2, 3,4-四苯基 -1, 3- 丁二烯.

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The development of the L 3 low - light - level night vision technology is introduced briefly in this paper.

本文对微光夜视技术的进展作了简要的介绍.

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Rule l 3 For any identical invention - creation , only one patent right shall be granted.

　　第十三条同样的发明创造只能被授予一项专利.

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About one - third of service companies have experimented with the approach.

大约有l/3 的服务性公司已经使用过作业成本法.

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The clinical picture resembles bacterial pneumonia although cough and sputum are absent in one - third of cases.

临床表现类似细菌性肺炎,但l/3 患者可不咳、无痰.

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