核型

In the study, a set of near isogenic lines of CMS-S, S-Mo17Rf3Rf3 and S-Mo17rf3rf3, were adopted, and TdT-mediated dUTP nick-end labeling, in situ immunolocalization of cytochrome c and DNA ladder assay were employed to study the programmed cell death process on cytology and DNA level. The microscope observation evidenced that tapetal cells of fertile anthers kept intact until microspores, and then were disintegrated on later developmental stage.

S型细胞质雄性不育系的一对近等基因系S-Mo17Rf3Rf3 和S-Mo17rf3rf3为材料，采用TdT介导的dUTP DNA末端标记、细胞色素C免疫原位杂交和DNA寡聚核小体片段电泳等方法，分别在细胞学水平和DNA水平上研究了玉米CMS-S小孢子败育的细胞程序性死亡过程。

Objective: To investigate the roles of OXR1 in the ventral tegmental area and nucleus accumbens in drug-seeking behavior induced by morphine.

目的：探讨中脑腹侧被盖区和伏隔核内食欲素Ⅰ型受体在大鼠觅药行为表达中的作用。

Objective:To investigate the roles of OXR1 in the ventral tegmental areaand nucleus accumbensin drug-seeking behavior induced by morphine.

目的：探讨中脑腹侧被盖区和伏隔核内食欲素Ⅰ型受体在大鼠觅药行为表达中的作用。

For the tetranuclear complexes,it is the firsttime that the magnetic susceptibility data have fittedsatisfactorily to the expressions which we havedemmived.

在链型杂四核配合物方面，首次用自己推出的磁化率公式对实验数据进行了最小二乘拟合。得到了令人满意的结果并作出了合理的解释。

Methods: Eleven B-CLL patients were studied. Leukemic lymphocytes with (n=8) or without (n=3) P2z receptors were exposed in vitro to ATP, benzoylbenzoic-ATP, 2-methylthio-ATP(2MeSATP), adenosine-5′-［γ-thio］ triphosphate, and other nucleosides for 8h. Apoptosis was detected by electron microscopy, agarose gel electrophoresis, and quantitative TdT assay. Results:Apoptosis was detected only in leukemic lymphocytes with P2z receptors. By using the quantitative assay, ATP-inducing DNA strand breaks were found to occur specifically for BzATP, ATP and 2MeSATP, but not for ATP-γS and other nucleosides.

将表达P2z受体［P2z］与不含P2z受体［P2z］的两组CLL细胞分别同1.0mmol/L三磷酸腺苷体外培养8小时，以电镜、DNA凝胶电泳和定量DNA 3′端TdT法检测细胞凋亡；并对ATP、苯甲酰苯甲酸ATP、2-甲基硫ATP(2MeSATP)、γ-硫代ATP及其它核苷的诱导效应和氧化型ATP、1-［N，O-二(5-异喹啉碘酰基)N-甲基-L-酪氨酰］-4-苯哌嗪KN-62）的抑制效应做定量研究。

The coordination geometry of the Eu atom is best described as a strongly distorted square-antipyrism.. The two Eu atoms are bridged by two N-oxide oxygen atoms forming a dimeric unit with crystallographic inversions centre. The Eu……Eu distance is 4.2137(9)〓. The two europium atoms and two bridging oxygen atoms is coplanar. The angles of Eu(1)-O(7)-Eu(1A) and O(7)-Eu(1)-O(7A) are 117.82(14)° and 62.18(14)°, respectively. 15 is the first dinuclear triboluminescent lanthanide complex reported.

同时还测定了其摩擦发光光谱与其光致发光光谱，并讨论了晶体结构和摩擦发光活性之间的关系。X-射线结构分析表明，15为有对称中心结构的配合物，每个Eu与三个HTTA的六个O原子和两个PyO的两个O原子形成八配位的四方反锥几何构型，2个N-Oxide O原子桥联两个Eu，形成了一个双核配合物，Eu。。。。

In this paper, Nucleating agent and uniaxially orientaion were studied to the crystallization of Polylactic acid.

本论文主要研究了成核剂对聚乳酸结晶的影响和取向条件对PLA制品晶型及性能的影响。

This study focused on the mRNA decay process of the transcripts of the candidate sterile gene in maize Zea mays L.

本研究对玉米S型细胞质雄性不育中胞质不育候选基因的转录产物在核恢复基因的作用下被降解并引起育性恢复的生物学机理进行了探讨。

In a chemical oxidative seeded polymerization system of aniline using the polystyrene seed particles pretreated by emulsifier or modified by copolymerizing with acrylic acid, colloidally stable core-shell polystyrene/polyaniline composite particles were prepared.

在苯胺的化学氧化种子聚合体系中，以乳化剂预处理和与丙烯酸共聚改性的聚苯乙烯粒子为种子，制备具有一定分散稳定性的聚苯乙烯／聚苯胺核－壳型复合高分子粒子乳液。

Supplementation of folate in diets may reduce hyperhomocysteinemia induced by excess intake of methionine and decrease the expression of NF-κBP65 protein and monocyte chemoattractant protein-1 (MCP-1) in carotid common artery after balloon angioplasty, These data show that Hcy may exacerbate neointima hyperplasia after denuding injury by increasing the expression of inflammatory factors via the activation of NF-kB, Folate can reverse the effect of Hcy on the activation of NF-κB and the expression of MCP-1, an effect of preventing the restenosis postangioplasty.

而Hcy有可能通过激活核转录因子通路增加损伤血管组织炎症因子的表达而加重血管球能损伤后新内膜的过度增生过程，叶酸能对抗Hcy的上述作用，对高同型半胱氨酸血症引起的血管成形术后再狭窄可能有一定的预防作用。

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