But it may be one no longer. A group of Dr Rao's colleagues, led by Jonathan Stamler, think the answer is a gas called nitric oxide-or, rather, a lack of it.
一组饶博士的同事，在约翰森·斯塔姆勒(jonathan Stamler)的领导下提出谜底可能就是一氧化氮——不是搀杂，而是缺乏。
The-COOH contents in HA increases, phenolic-OH group decreases and the chemical acidity of acidic functional groups increases when HA is oxidized by nitric acid.
用硝酸氧化能使ha中羧基含量增加，酚羟基减少，酸性功能团活性提高。
The ulcer index (UI), gastric mucosal blood flow (GMBF) and nitric oxide (NO) content in gastric mucosa were measured in rats of every group.
检测三组大鼠胃粘膜的溃疡指数（UI）、胃粘膜血流量（GMBF）和胃粘膜一氧化氮（NO）的含量的变化。
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