CORE--TECHNICAL

妊娠绵羊将继续用于这些研究，因为它们容易获得，相对便宜（与灵长类动物相比），胎儿足够大， 可以研究足够数量的几种组织（脑动脉和肺动脉，脑垂体和肾上腺等），我们和其他人已经积累了关于这个物种的大量生理数据。基本上，本提案中的所有单个项目都将使用已适应高海拔、长期低氧血症或常氧对照的妊娠或非妊娠绵羊。处死时，将这些动物的组织分配给几个研究者和项目。因此，本技术核心包括这些研究的绵羊。此外，它还包括大多数这些实验所需的几个主要设备项目的费用。实验动物和设备技术核心将用于中心所有成员共同的基本每个项目。这样的技术核心优化了实验室、实验本身以及数据采集和分析的有效运作。

Pregnant sheep will continue to be used for these studies, as they are readily available, are relatively inexpensive (as compared with primates), the fetuses are large enough so that adequate amounts of the several tissues can be studied (cerebral and pulmonary arteries, pituitary and adrenal gland, et cetera), and we and others have amassed a considerable body of physiologic data on this species. Essentially all of the individual projects in this proposal will use pregnant or nonpregnant sheep which have been acclimatized to high altitude, long-term hypoxemia, or normoxic controls. At the time of sacrifice, tissues from these animals will be partitioned among the several investigators and projects. Thus, this Technical Core includes the sheep for these studies. In addition, it includes the expense for several major items of equipment required for most of these experiments. The experimental animal and equipment technical core will be utilized for essentially every project in common by all members of the Center. Such a technical core optimizes the efficient operation of the laboratories, the experiments per se, and the data acquisition and analysis.