化合物

When the tree changes from health to weak, the main terpene compounds changed, such as the amount of 3-carene, isolimonene,β-pinene, 4-carene were significantly enhanced, and santolina triene,α-fenchene,β-myrcene,β-phellandrene were declined. It will provide a basis for Monochamus urussovi Fischer to select suitable parasitic Picea jezoensis.

鱼鳞云杉树势由健康向衰弱转变时，主要烯萜类化合物含量发生变化，3-蒈烯、异柠檬烯、β-蒎烯、4-蒈烯、α-蒎烯等含量显著上升，而神圣亚麻三烯、α-葑烯、β-月桂烯、β-水芹烯等含量下降，这些烯萜类化合物的变化，为云杉大黑天牛定位选择适宜寄生的鱼鳞云杉提供了依据。

Cerium compound, inorganic or organic excl. ferrocerium and natural cerium compounds

铈化合物，无机或有机的（不包括铁铈和天然铈化合物

The planet is probably well supplied with minerals containing combinations of magnesium, iron, silicon and oxygen ferromagnesian silicates , and combinations of iron and sulfur (troilite There may .

火星可能蕴藏了大量的含有镁，铁，硅和氧的化合物以及硫铁化合物的矿物质，可能还有一些游离铁。

The structure of the finial products and most of the key intermediates were confirmed by NMR, MS, or HRMS.

所有目的化合物和大部分中间化合物的结构都经NMR，MS，或HRMS分析确证。

Sheet-like particles are mainly aluminosilicates and calcium compounds on which iron compounds are attached, and the majority of floccule particles contain calcium compounds.

片状颗粒主要是附有铁化合物的铝硅酸盐和钙盐，絮状颗粒则主要含钙化合物。c不同采样点单个颗粒的形貌、组分有明显差异。

All products are characterized with 1H-NMR. The products are used as PTC in the fluoridation of p-chloronitrobenzene, tetrachloroterephthaloyl chloride and N-benzyltetrachloridephthalimide to detect the performance of the different PTCs.

分别将上述化合物作为相转移催化剂应用于对硝基氯苯、四氯对苯二甲酰氯和N-苯基四氯邻苯二甲酰亚胺等化合物的氟化反应中，以检测各催化剂的催化性能。

A novel oil-soluble rare earth compound La-C(subscript i8 free of sulfur and phosphorus was synthesized as lubricant additive.

合成了1种不含硫磷的新型稀土化合物，该化合物在液体石蜡中具有较好的溶解性。

The conclusion is as follows: One of the common characteristics of overseas textbook is that they all reflect the basic concept of "structure determines property, the property of structure". The logical structure of overseas textbooks of organic chemistry is that the nature of organic compounds closely related to the theory of organic chemistry by that relationship and transformation of functional groups decide the property and reaction.

国外教材的共同特点之一是体现出"结构决定性质，性质体现结构"的基本观念，从官能团间的关系与转化来统摄有机化合物的性质及其反应，使有机化合物的性质紧扣有机化学的相关理论，构成了有机化学教材的逻辑结构。

PCBs at the beginning of the land fill were mainly composed of the 3-Cl and 5-Cl compounds. In the late of the land fill, 2-Cl compounds increased significantly. The main factor affecting the PAHs, PCBs contents were microbial degradation and transformation. Analysis of the pollutants source s indicated that PAHs in sludge were mainly derived from the waste water of refinery, coking plant, gasworks, smelt plant and pitch plant.

填埋初期污泥中PCBs主要以3-Cl和5-Cl化合物为主，填埋后期，2-Cl化合物大大增加，占总的PCBs含量的大部分影响PAHs、PCBs含量变化的主要因素是生物对PAHS的降解转化根据污泥中各污染物的含量对污染物进行源解析表明，污泥中PAHs主要来源于炼油厂、炼焦厂、煤气厂、冶炼厂和沥青厂等排放的废水。

Compounds 1, 2 and 3 were isolated from the genus Sanguisorbea for the first time.

化合物1、2、3为首次从地榆属植物中分离得到的已知化合物。

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。