Does voltage affect excitation-contraction coupling in the heart?
Does voltage affect excitation-contraction coupling in the heart?
复制标题
电压会影响心脏的兴奋-收缩耦合吗？
作者：
M. Cannell;J. Berlin;W. Lederer;M. Morad;L. Cleemann;G. Callawaert
通过对缓慢更新的深水沃茨进行测量，可以准确估计工业化前的四氯化碳水平（1）。相比之下，即使在沃茨中，CH 3CC 13的损失也将是相当大的，仅在40年的时间内（也就是说，自从CH 3CC 13被引入环境中以来），它的输入功能与F-li和F-12的输入功能在性质上没有显着不同（1）。因此，我们重申，将其用作额外的示踪剂不会有很大的好处。我们建议在今后的海洋采样考察中，GC 14与F-I1、F-12和F-113一起测量。我们还鼓励我们的同事对这些化合物和海水中的氯氟烃进行水解速率测量：文献中明显缺乏关于后一类化合物的数据以及一般海水中的测量。D. W. R.美国纽约州厄普顿，布鲁克海文国家实验室，应用科学系，海洋科学部。KRYSELL查尔默斯理工大学分析与海洋化学系，哥德堡大学，S412 96，哥德堡，瑞典
possible to estimate preindustrial CC14 levels accurately from measurements in slowly renewed deep waters (1). In contrast, loss of CH3CC13 would be considerable even in cold waters over a period of only 40 years (that is, since CH3CC13 was introduced into the environment), and it has an input function that is not dramatically different in nature from those of F-li and F-12 (1). We thus reiterate that no great advantage will be gained from its use as an additional tracer. We recommend that GC14 be measured together with F-I1, F-12, and F-113 during future oceanographic sampling expeditions. We also encourage our colleagues to perform hydrolysis rate measurements for these compounds and the chlorofluorocarbons in seawater: data concerning the latter class of compounds, and measurements in seawater in general, are notably lacking in the literature. D. W. R. WALLACE Oceanographic Sciences Division, Department ofApplied Science, Brookhaven National Laboratory, Upton, NY 11973 M. KRYSELL Department ofAnalytical and Marine Chemistry, Chalmers University of Technology, and University of Goteborg, S412 96, Gdteborg, Sweden