化合物

The results indicate that series A have better planarity, longer conjugated bridge and larger βtot value than series B.

结果表明：A类分子的共面性好，共轭链长，β值均比B类分子的大。14个化合物中前线分子轨道能级差越小的化合物，其βtot值越大。

The constituents of bulb of F. puqiensis were studied. Five steroid alkaloids were isolated. The plane structure and stereoscopic configuration of 4 compounds were elucidated. They are named as puqienine A (FP-33), puqienine B (FP-3), N-demethyl-puqietinone (〓 FP-34) and puqietinone (〓, FP-9). Puqienine A and N-demethyl-puqietinone are new compounds. Puqienine B is as same as FPQ-3 elucidated by Prof.

对F.puqiensis鳞茎化学成份进行了研究，分得5个甾体类生物碱成分，并采用 UV、IR、EI-MS、1D-NMR，HHCOSY、CHCOSY、HMBC和X-RAY等光谱技术和理化常数测定，鉴定出4个化合物的平面结构和立体构型，分别为蒲圻贝母碱甲（puqienineA，FP-33）、蒲圻贝母碱乙（puqienineB，FP-3）、N-去甲蒲贝酮碱（N-demethyl-puqietinone，FP-34）和蒲贝酮碱（puqietinone，FP-9），其中蒲圻贝母碱甲和N-去甲蒲贝酮碱为新化合物。

The quantitative structure retention relationships of the Alkylnitrophenols on different polar stationary phases were set by the Genetic Algorithms method.

利用分子力学和量子化学方法计算出烷基硝基苯酚类化合物的分子结构描述参数，用遗传算法建立化合物在不同极性色谱柱上的QSRR模型。

Solute-related parameters were computed by means of AM1 method, the quantitative structure-chromatographic retention relationship of the hydrocarbons on different polar stationary phases was set with stepwise regression method.

运用量子化学中的AM1方法计算烃类化合物的分子结构描述参数，借助逐步回归法建立了烃类化合物在不同极性色谱柱上的QSRR模型。

The most important factor that influences the biological activity of OP is the polarizability given by π1 in TLSER model. It indicates that the specific reaction might occur.

在OP化合物与生物体的作用过程中，分子的极性是影响活性的最重要因素，表明OP化合物可能与生物体发生特异性反应。

Polyalcohol,preservative,metal ion and carbohydrate were experimented through single-factor tests,potassium sorbate,Na~+、K~+、Ca~(2+)、sucrose and lactose had great effects on the stability of mannanase M0710.Orthogonal experiments decided the optimal stabilizing agent were potassium sorbate 3%,sodium chloride 2%and sucrose 2%.

对突变酶M0710的稳定剂也做了初步研究，单一因素试验考察了多元醇类化合物、防腐剂、金属离子和糖类化合物等对目的酶稳定性的影响，其中山梨酸钾、Na~+、K~+、Ca~(2+)、蔗糖、乳糖对酶的稳定性有明显效果，通过正交试验最后确定效果最佳的液态酶M0710的稳定剂为山梨酸钟3%、氯化钠2%和蔗糖2%。

So the investigations of REMPI in different systems have comprehensive value in basic field or applied field.In recently years, the photodissociation of sulfur and carbon contained polyatomic molecule has been attracted much attention because these species play a key role in atmospheric physics, environment pollution and ecological preservation.

对含硫、碳化合物的研究在大气物理、环境污染、生态维护和生产应用中具有重要的作用，因此含硫、碳氢化合物的光解离动力学研究受到了较多关注。

The extraction method of flavonoid in pomelo peel was studied with different ways.

通过各种不同的方法提取柚皮中的黄酮类化合物，比较不同提取方法的提取效率及提取物中黄酮类化合物的含量，从而探讨最佳的提取方法。

Compounds 4 and 5 are isolated from Potentilla for the first time; compouds 17 are isolated from this plant for the first time.

化合物4、5为首次从委陵菜属植物中分离得到，化合物1~7均为首次从多茎委陵菜中分离得到。

The first-way shows that the virus can be inactivated firsthand by the flavonoid compound; The second-way shows the flavonoid compound can inhibit virus replication by inhibiting the activity of ptyalin; The third-way reflects the flavonoid compound can interdict adsorption.

第一种给药方式说明黄酮类化合物可以直接灭活H5N1病毒；第二种给药方式说明黄酮类化合物可通过抑制流感病毒唾液酶的活性，从而抑制病毒粒子的复制；第三种给药方式反映一定浓度的药物可以阻断病毒对细胞的吸附作用。

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。