化合物

Transition metal nitrides belong to a class of interstitial compounds, have the properties of covalence compound, ion crystal and transitional metals.

过渡金属氮化物是一类金属间充型化合物，兼具有共价化合物、离子晶体和过渡金属的性质。

Using DFT combined with the orbital localized approach and Xu's covalence new concepts on a molecular fragment, it is concluded that the covalence of copper atom is 7 in 〓-type clusters and in inorganic fullerene-like molecule 〓, and there are Cu-Cu single bonds in 〓-type clusters.

应用DFT结合轨道定域化的方法和分子片共价的新概念，提出了在〓类簇合物和无机类富勒烯分子〓〓中Cu原子的共价为7，以及化合物中Cu-Cu单键的存在；解释了通常认为这类化合物中Cu-Cu之间没有成键作用而又不能回答较短的Cu-Cu键长的问题。

Structures of the six complexes have been determined by X-ray single crystal diffraction, and the influencing factors on structures have been discussed.

通过对这四种化合物的晶体结构的讨论，初步探索了影响它们结构的因素，并研究了化合物2的电学性质。

Complexes have been determined by single crystal X-ray diffraction, and study the influence factor of their structure through the discussion of crystal structure of these compounds.

利用单晶X-ray衍射测定了这三种化合物的结构，通过对三种化合物的晶体结构的讨论，初步探索了影响它们结构的因素。

The main differences in chemical compounds related to the taste and flavorbetween cultured and wild prawns may be summerized as follows: 1 The content of quaternary bases in the extractives of wild prawn is higher than that of cultured prawn; 2 The content of fatty acids, C18:2ω6 is higher in the cultured prawn; 3 Many thiazole compounds were found in the odor concentrate of cultured prawn, azulene was found in the odor compounds of wild prawn; 4 The textrue of cultrued prawn meat is relatively weak.

综上所述，养殖对虾与天然对虾的尝味比较中主要差别是提取物组分的有机碱；对虾肌肉脂质比较结果是养殖对虾肌肉脂质中C18：2ω6含量特别高；对虾挥发性成分结果是养殖对虾中有大量的噻唑化合物，天然对虾存在薁类化合物；两类对虾质地比较的结果是养殖对虾质地不及天然对虾。

Cyclodextrin is a cyclic compound of glucosan formed through cyclizatjon of starch and its relevant compounds under the working of starch enzyme in Baccillus macerans. It has great potentialities in food industry.

环糊精是利用一种细菌Bacillus macerans内的特殊淀粉酶，把淀粉和其有关化合物以环化结合而形成的环状聚葡萄糖化合物，在食品工业上有很大的应用潜力。

AIM:To assess the antioxidative activity of a new cyclic diaryheptanoid (compound 1) from ginger on free radical damage. METHODS:Hemolysis, MDA levels of mice liver tissue homogenates, the conformation changes of irradiated PUC18 were used as indices.

目的和方法：采用溶血实验，小鼠肝组织脂质过氧化物测定，采用受辐射质粒构象改变等方法测定从生姜中分离得到的一新的环状二苯基庚烷类化合物(化合物1)的抗氧自由基损伤活性。

All compounds are synthesized starting from the acylation reaction of gallic acid with L-glutamine to form the basic scaffold, followed by the cyclic reaction in acetic anhydride and the key intermediate cyclic anhydride (compound 4) was obtained. The intermediate compound is condensed with different amino acids or primary amines, and produces the target compounds.

本研究以L－谷氨酸为基本骨架，与甲醚化保护的没食子酸缩合后，经过酰化、环合反应得到关键中间体环状酸酐（化合物4），再经胺解反应合成目标化合物，其化学结构经过红外光谱、电喷雾质谱和核磁共振谱（氢谱、碳谱、碳氢异核多键相关谱）确证。

A novel isomer of furazano energetic compound 3,4-diaminofurazanofuroxan was synthesized by the dimeric ring-close reaction of transitional intermediate 3-amino-4-cyanofurazan oxide after the energetic compound 3-amino-4-chloroximinofurazan was treated with diluent alkali at low temperature, The yield of DAFF isomer could be over 66.3% and its single crystal was cultivated.

将含能化合物3-氨基－4-氯肟基呋咱在低温下用稀碱处理后发生过渡中间体3-氨基－4-氰基呋咱氧化物的二聚关环反应合成了新型呋咱类含能化合物3，4-二氨基呋咱基氧化呋咱异构体，产率达66.3%。

They existed as dosage-effect and time-effect. All of these results proved that Sertoli cell was the first target cell, spermatogenic cell was the second one and mitochondrion was the target. Otherwise, we proved this compound can disturb the development and growth of sperms, influence the activity and amount of sperms and increase the deformation ratio.

结合组织病理和性激素及酶活性的改变，揭示该化合物睾丸毒性的靶细胞是支持细胞，其次是生精细胞，作用的靶点是细胞内的线粒体，此外还证明该化合物干扰精子的生长和发育，影响精子的活力和数目，增加畸形率，是雄性精子畸变的诱导剂。

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。