OBT

Objective Look for the cause of false negative in stool occult blood test ( OBT ) .

目的：寻找便类潜血试验（OBT）中假阴性的原因。

The second-throat area ratio limit , the minimal starting pressure ratio and the corresponding cell pressure were obt .

采用该方法可以较好地估计第二喉道极限面积比、最小启动压比以及对应的盲腔压力。

At the end of the experiment , the colon mucosa damage index ( CMDI ) and the occult blood test ( OBT ) were evaluated .

实验结束后评价大鼠结肠黏膜损伤指数（CMDI）与粪便隐血实验（OBT）、检测结肠组织MDA，NO，PGE2，TXB2含量；

Objective To compare two measurements of gastric emptying rate of solids : Radio-opaque markers ( ROMs ) and 13 C-octanoic acid breath test ( OBT ) .

目的比较不透X线标志物法（ROMs）和C-辛酸呼气试验法（OBT）检测胃固体排空方法的相关性。

SAPO-34 obt ained at 12 h already bears good catalytic performance for methanol-to-olefin and the molecular sieve samples with a longer crystallization time produce less isobutene because there is less SAPO-5 or no SAPO-5 in the samples .

对晶化不同时间的SAPO34分子筛进行了甲醇制低碳烯烃反应的性能评价，发现晶化12h的分子筛样品已经具有良好的催化性能。