介体

On the respect of piezoelectric properties, Mn coexisted as Mn〓 and Mn〓 in PZNPZT system and suitable Mn doping as acceptor improved Q〓 and lowed tan δ greatly, meanwhile, high density assured K〓 out of decrease.

适量的锰掺杂使PZN-PZT体系的机械品质因数Q〓上升和介电损耗tan δ下降，同时瓷体较高的致密度又保证了机电耦合系数K〓不致降低。

Methods: Density gradient centrifugalization and absorption technique wererespectively applied to detach peripheral blood mononuclear cells andperipheral blood lymphocytes,T lymphocytes were got by Nylon postabsorption method, and CD4+T and CD8+T lymphocytes divided with anti- CD4 andanti-CD8 antibody by alexin cytotoxic method.

密度梯度离心法分离外周血单个核细胞，玻璃器皿吸附法分离外周血淋巴细胞，尼龙棉柱法分离 T 淋巴细胞，补体介导的细胞毒法分别制备 CD4+T和 CD8+T 淋巴细胞，采用 T 淋巴细胞与角质形成细胞共培养技术研究银屑病患者外周血 T 细胞对角质形成细胞的影响，免疫组化法检测共培养角质形成细胞 Ki67、c-Myc 及 Bcl-xL 蛋白的表达。

These results suggest that the activate spleen-energy method can achieve appetitive purpose by not only affecting the gastrointestinal tract function in periphery, but also regulating the process of ingestion in brain. The basic research about ingestion indicate: one hand, after food enters the gastro-intestinal tract, the endocrine cell of the intestinal tract is activated and secrete many kinds of brains intestines peptide, the level of the brain intestines peptide in blood as the periphery signal spreads to the central nervous system regions that control digest and feeding behavior. On the other hand, it has been shown that dorsal parabranchial neurons, containing CCK-8S, extend fibers to the VMH and are involved in the inhibition of feeding .

关于摄食控制的基础研究表明，一方面食物进入胃肠道后，激活肠道的内分泌细胞，分泌多种脑肠肽如CCK-8S，这些脑肠肽在血中的水平作为外周信号可通过"肠—脑轴"传入中枢神经系统介导消化和摄食行为的部位，影响摄食中枢神经元的活动调节动物的摄食行为；另一方面中枢神经元可合成释放内源性的神经肽直接作用于摄食中枢神经元调节摄食，如中枢鳃旁体神经元的神经纤维就可延伸到达VMH，并且合成释放内源性的CCK-8S。

A simple relationship of dielectric relaxation is proposed,which can completelyexpress the high and low frequency dielectric relaxation in PMN-PT relaxorferroelectrics.It fits complicated experimental Argand diagram closely.

通过对弛豫铁电体PMN-PT频域介电谱的分析，提出能完全描述高、低频不同弛豫特性的复杂弛豫的简单关系式，并且完好地拟合了不规则的弛豫Argand图。

Agrobacterium-mediated transformation system of Botrytis cinerea was established and a T-DNA insertion mutants library was constructed.

本实验建立了农杆菌介导的灰葡萄孢转化体系，构建了T-DNA插入的灰葡萄孢突变体库。

Tumefaciens mediated transformation using cotyledonary node as explants was optimized; 3 methods including cutting chapiter, ovary injection and chapiter spreading for pollen tube pathway was compared. Cutting chapiter and ovary injection can both achieve insect resistant gene tranformants.

优化了以子叶节为外植体的农杆菌介导转化技术；比较了切割柱头、子房注射和子房涂抹3种花粉管通道法处理授粉后黄瓜子房的转化效果，切割柱头和子房注射均可成功获得黄瓜抗虫转基因植株。

OBJECTIVE: To choice the optimal concentration of liposomes-mediated chemosynthesis siRNA transfection, and to discover a simple efficient RNA interference application.

目的：筛选脂质体介导化学合成siRNA转染原代心肌细胞的最佳浓度，以及简单高效的RNA干扰操作方法。

The recognition mechanisms of GGR and TCR to UVB-induced photodamages were summarized: Xeroderma Pigmentosum group C, the recognition factor in GGR, executed its function avoiding direct contacting with lesions; the conversion between monomer and dimer of Cockayne syndrome B protein was underlined in the recognition of TCR; ubiquitylation mediated by DNA damage binding protein played an important role in NER recognization at chromatin level; moreover, the fate of the recognition factors was also discussed.

识别因子XPC通过一种不直接识别损伤本身的机制在GGR识别过程中发挥作用；在TCR识别过程中强调了关键因子CSB单体及二聚体两种形式的转换。在染色质水平上，DDB介导的泛素化作用是NER识别过程中重要的调控要素。另外，完成使命的识别因子的最终走向也是NER途径中的一个重要环节。通过分析上述生化过程，较清楚地总结了GGR及TCR对UVB导致的光损伤的识别机制。

The results displayed the symplasmic isolation of sieve element/companion cell complex from the surrounding parenchyma cells, and suggest that the photoassimilate unloading from phloem follows an apoplasmic pathway and must be facilitated via the sugar transporters.

由此可见，苹果果实韧皮部组织同周围薄壁组织存在共质体隔离，同化物必须通过糖转运蛋白的介导从筛分子以跨越质膜的方式卸出到质外空间，然后再装载到周围薄壁细胞中。

Mesoporous tin dioxide (SnO2) was synthesized by thermal decomposition of the precursor obtained via a solvothermal method in the presence of SnCl4·5H2O, urea and ethanol.

采用溶剂热方法，以SnCl4·5H2O/尿素/乙醇三元体系合成了具有特定结构的前驱体，该前驱体经焙烧后得到了具有海绵状结构的介孔SnO2。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐