激素类

The herbicide have been introduced in rice cultivation systems to control weeds, particularly the major grass weed in rice the barnyardgrass for ten years more.

二氯喹啉酸是一种新型选择性激素类除草剂，主要用来防除稻田杂草，尤其对稗草有极高活性，已连续广泛使用十几年。

In the current study, anoxic dechlorinations of p, p'-DDT,γ-HCH, HCB in the Liao River sediment were studied under the following conditions: without any additional short chain carbon substrates or vitamin B〓; with the addition of short chain carbon sources (including sodium lactate, sodium propionate or sodium acetate); with the addition of vitamin B〓; with the addition of both short chain carbon substrates and vitamin B〓, with the addition of sodium dodecyl sulfate , a kind of surfactant; the coexistence of the three chlorinated compounds.

氯代有机物一般都是典型的持久性环境污染物，其中部分氯代有机物还是环境激素类物质，例如，滴滴涕、林丹和六氯苯等，这些氯代有机物在环境中的迁移转化一直是国际环境化学领域的热点、重点课题。氯代有机物进入环境水体后，成为沉积物吸附态有机污染物的重要成分，天然水沉积物经常处于缺氧状态。因此，研究氯代有机物在天然水体沉积物中的缺氧脱氯行为是非常必要的。

ABSTRACT Hydrocortisone is the major glucocorticoid and an important intermediate in steroid drug synthesis.

氢化可的松是哺乳动物主要的肾上腺皮质激素类药物和重要的甾体药物合成的中间体。

It is mainly engaged in the production of corticosteroids, formulations, amino acid raw materials as well as injections, chemical raw materials, cardiovascular drugs, external formulations, prophylactics, finished traditional Chinese medicines, health products and etc., nearly 300 varieties.

主要生产经营皮质激素类原料药及制剂、氨基酸类原料药及制剂、化工原料、心血管药物、外用制剂、中成药、保健食品等300余种产品。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。