化合物

Their previous research had looked at silver selenide and silver telluride, two compounds that are magnetically inert in nature.

他们之前的研究专注于硒化银以及碲化银化合物，这两种化合物在自然界中都对磁性有惰性。

With the ripening process of Xuanwei ham, the volatile compounds identified from M. semimembranosus and M. Bicepts femoris of the ripened hams at 12 months are 98 and 67 respectively.

在宣威火腿干燥成熟过程中，火腿肌肉中形成的挥发性化合物的种类逐渐增多，12个月终产品的半膜肌和股二头肌中的挥发性化合物分别为98种和67种。

The predominance of these series is replaced in turn by benzothiophenes and increasingly complex ring-like compounds in the higher temperature ranges.

在更高的温度范围内，这些化合物的绝大部分又被苯噻吩和更复杂的环状化合物置换。

Results Based on the botanical metabonomic concept, a novel valuable sesquiterpene compound has been quickly isolated from the aerial part of Carpesium lipskyi.

结果以基于植物代谢组学概念的混合物氢谱测定方法为指导，从高原天名精中快速分离得到有价值的倍半萜类化合物，避免了天然产物化学经典分离方法的大量、无意义的重复实验，提高了发现先导化合物的效率。

In this paper,the behavioral,physiological, ecological adaption mechanism of H.armigera and H.assulta to their common host plant tobacco were studied comparatively,and the main results were summarized as follows:Electroantennogram response of adult to tobacco volatiles:(1) H.armigera and H.assulta elicited similar EAG responses to the tested 20 tobacco volatiles;both of them elicited significantly more sensitive to green leaf volatiles,aliphatic and aromatic compounds, than to monoterpene,sesquiterpene,heterocyclic compounds under lower concentration; while the similar EAG responses under higher concentration were detected,but most of them were not significantly different with each other.

本文从行为、生理和生态适应三个方面，对棉铃虫和烟夜蛾与烟草间的互作进行了比较研究，主要结果如下：成虫对烟草挥发物的EAG反应：(1)两种夜蛾对测试的20种烟草挥发物均可产生EAG反应；低浓度下对绿叶气味、脂肪族、芳香族化合物的EAG反应显著高于单萜类、倍半萜类和杂环化合物；高浓度下的EAG反应也表现出相似的总体反应趋势，但多数反应值间的差异未达显著水平。

Pteroside P′(1) was identified to be a new C14 sesquiterpene glycoside; luteolin, palmitic acid and apigenin 4′-O-α-L-rhamnopyranoside may be the main active components of Pteris multifida against benign prostatic hypertrophy.

化合物pteroside P′(1)是一个新的C14的倍半萜苷；化合物木犀草素、棕榈酸和芹菜素4′-O-α-L-鼠李糖苷可能是凤尾草能抑制良性前列腺增生的主要活性成分。

The classes of these compounds included triterpenoid, diterponid, sesquiterpene, steroid, lignan, flavone, coumarin, phenol, and fatty acid.

已鉴定的化合物类型涉及单萜、环烯醚萜、倍半萜、二萜、三萜、木脂素、黄酮、脂肪酸、甾醇、香豆素、酚酸和其它类型的化合物。

These results give the evidence about the intramolecular charge transfer character in the emitting singlet state of this compound.

用Lippert-Mataga方程计算了该化合物基态和激发态偶极矩间的差值。结果证明该化合物在激发态存在着强烈的分子内电荷转移行为。

Results: Three compounds were obtained and identified asβ sitosterol, oleanolic acid and rivularicin. Conclusion: Conpound rivularicin were isolated from the plant for the first time.

结果和结论分离并鉴定了该药所含的 3个化合物：①β-谷甾醇、②齐墩果酸、③rivularicin ，其中化合物rivularicin为本实验首次从该植物中分离和鉴定成功。

This method is sensitive, accurate and suitable to the determination of PAHs in smoked meat.Key words: gas chromatography/mass spectrometry; polycyclic aromatic hydrocarbons; smoked meat

方法具有灵敏度高、准确度好、能同时分离测定20余种多环芳烃化合物的优点，适合于熏肉中多环芳烃化合物的分析测定。

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。