共价的

In the fierce market competition, we will always be based on price and quality, the prestige is supreme, the business philosophy of equality and mutual benefit and sincerely willing to work with other countries and regions set up long-term stability of the Friend of the cooperative relationship, a total of Almon Fig.

在激烈的市场竞争中，我们将始终本着质优价宜、信誉至上、平等互利的经营理念，真心地愿与世界各国、各地区的朋友建立长期稳定的合作关系，共展鸿图。

Under the instruction of above-mentioned theoretical results, in the thesis chapter 10, the strongly electron-withdrawing anion, C_5O_5~(2-)[dianion of croconic acid (4,5-dihydroxycyclopent-4- ene-1,2,3-trione)], was chosen as the chelator to coordinate with boron to form lithium salt, which will yield high ionic conductivity solutions, and exhibit wide electrochemical stability windows and high thermal stability. As described in the chapter, two new lithium salts containing C_5O_5~(2-), lithium bisborate and its novel derivative, lithium borate for Li-ion battery electrolytes were synthesized.

在上述理论结果的指导下，论文第十章选择了克酮酸二价阴离子——具有很强的酸性、较好的芳香性、较大的电荷分散性、形成的配合阴离子具有较显著的共轭性——作为配体与B配位，合成了二种新的锂盐，通过实验测定了它们的结构和在有机溶剂中的溶解性。

The dissertation mainly consists of two parts:1. The Reaction Chemistry of Alkynes under Palladium Catalysis Part 1 studies the reaction α,β-unsaturated carbonyl compounds with alkenylpalladium intermediate generated by nucleopalladation, and discovered 1 the Pd-catalyzed tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls,2 the four-component tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls, 3 the tandem intramolecular oxypalladation-conjugate additionreaction of alkynoic acids with α,β-enals. These new reactions provide notonly efficient highly stereoselective methods for the synthesis of γ,δ-unsaturated,polyunsaturated carbonyl compounds and γ-lactonic aldehydes, but also thebasic transformations for a number of C-C bond formation reactions which can be usedto design synthesis of many acyclic, cyclic or polycyclic compounds.

本论文的主要工作分为两个部分：一、钯催化下炔烃的反应化学在本小组前人工作的基础上，我们详细研究了炔烃亲核钯化产生的烯基钯中间体与α，β-不饱和羰基化合物的反应，发现两价钯催化下卤离子-炔烃-α，β-不饱和醛酮的串联加成反应、卤离子-炔烃-α，β-不饱和醛酮的西组分串联加成及炔酸分子内氧钯化-串联Michael型加成反应；由此发展了γ，δ-不饱和醛酮、多不饱和羰基化合物和带有醛酮基侧链的γ-丁内酯衍生物的高立体选择性合成方法，这一过量卤离子存在下的烯基钯对α，β-不饱和羰基化合物共轭加成反应的发现，为大量碳-碳键形成反应的实现提供了基础，使我们能够从这一基本反应出发，设计和开发多种分子内、分子间的碳碳成键反应，以好的立体、区域选择性组建开链、环状及多环类型的化合物。

Secondly, the energy band structure of codoped-TiO2 shows that an acceptor level and a donor level present inside the band gap, and an electron on the donor level passivates a hole on the acceptor level, so the systems still keep semiconductor character and enhance the separation of electron-hole pairs excited by photo irradiation.

另外， V： N共掺杂TiO2的能带结构表明：导带底下方施主杂质能级上的一个电子刚好补偿价带顶上方受主杂质能级上的一个空穴，使掺杂后TiO2材料表现出半导体的显著特征，这有利于电子—空穴对的分离，提高量子产率。

Rabbit was immunized by the conjugated alginate-BSA (1.0mg/kg) for 40-days routine immunity method; ELISA method was used to examine the titration of anti-alginate serum; The first generation parotid acinar cells were chosen to divided five groups (group A :contrast, group B: BAS, group C: alginate, group D: anti-alginate serum, group E: alginate +anti-alginate serum), We examined the proliferation of each part by MTT method at four times (lh, 6h,12h and 24h); In the meanwhile, The growth and shape of parotid acinar cells were observed under phase contrast microscope and scanning electron microscope.16 of the immunized rabbits by alginate were divided equally into Al and Bl groups, 12 normal rabbits were divided equally into A2 and B2 groups as control groups, Each rabbit was affused by 0.3ml(40fil/ml)alginate though parotid duct once time two days.

将藻酸盐与BSA偶连形成具有较强免疫原性的Alginate-BSA交联物免疫兔，按抗原量1.0mg/kg接种于新西兰白兔皮内，间隔10d加强免疫1次，共加强4次后，利用间接ELISA法检测藻酸盐抗体效价：将原代培养的兔腮腺腺细胞按10~4个/ml接种到96孔板上，置入细胞培养箱继续培养3d，分为5组：A空白对照组、B牛血清白蛋白组、C藻酸盐组、D抗藻酸盐血清组和E抗藻酸盐血清+藻酸盐组，分别加入PBS、牛血清白蛋白、藻酸盐或新鲜抗藻酸盐血清继续培养，分别于1h、6h、12h和24h不同的时间点，取出96孔培养板，采用MTT法检测5组腮腺腺细胞增殖情况

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。