胶粒

The flotation mechanism of MG reverse-floating dolomite was studied by measuring the Zeta-potential of collophanite and dolomite, Infrared Absorptions Spectra analysing the adsorption of MG onto the minerals surface, ultraviolet- visible light absorbing spectrum calculating the amount of MG which was adsorbed onto the minerals surface. These researches showed that MG was more easyly adsorded onto the surface of dolomite in feeble acidic solution because of pure dolomite charges positive as well as pure collophanite charges negative. Therefore, a lot of MG negative ions was adsorded onto dolomite, and that MG negative ions contained hydrophobic group, the hydrophobicity of dolomite was modified, the grains of dolomite were adhered to air bubble and float with them.

对白云石和胶磷矿的Zeta-电位测定、红外光谱分析MG药剂在矿物上面的吸附情况、紫外-可见吸收光谱测定矿物上MG的吸附量等，研究了MG药剂反浮选白云石的浮选作用机理，表明在弱酸性条件下，由于白云石表面荷正电而胶磷矿表面荷负电，带有羧基和羟基官能团的MG药剂更容易吸附在白云石上，使其周围吸附有大量的MG负离子，而MG负离子的另一端为烃基，这就改变了白云石的疏水性，使其矿粒容易附着于气泡上浮。

These parameters include super fine powder additives ,cement sort,cement mark,water binder ratio,variety and mixt.

文章在分析讨论了超细掺合料、水泥品种、标号及水胶比，超塑化剂的种类及掺量，胶结材用量，粗骨料的强度及粒径大小等配比参数对超高强高性能混凝土工作性及强度的影响后，指出了配制这种混凝土的技术途径。

Inaddition,we extract total RNA from cultural U251 cell of humanglioma,make coding gene extron amplification of TfR through ReverseTranscription-Polymerase Chain Reaction,construct expressionplasmid of pCDNA3.1-TfR after digestion of enzyme andconjunction,do transfection to U251 cell by liposome afteridentification,cause excess expression,detect the efficiency of transientexpression of TfR protein by pEGFPN1-TfR, sieve positive cell ofpCDNA3.1-TfR through G418, choose positive cell clone, detect theexpression of TfR in anteroposterior period through Western blot,FCM,cell immunochemistry and mRNA through RT-PCR, identify the effect of transfection.

另外，培养人脑胶质瘤U251细胞，进行细胞总RNA抽提，运用RT-PCR方法进行TfR基因的完整编码区外显子的扩增，经过酶切、连接后构建pCDNA3.1-TfR的表达质粒，鉴定正确后按脂质体转染方法转染人胶质瘤U251细胞，使其过量表达，通过pEGFPN1-TfR检测其瞬时转染的效率；用G418对稳定表达pCDNA3.1-TfR的细胞进行筛选，挑选阳性细胞克隆，运用Western blot、流式细胞检测技术和细胞免疫化学以及mRNA半定量的方法检测TfR在转染前后的表达水平，鉴定转染的效果。

After being digested with EcoR I and Xho I, they were inserted to the vectors pGEX-4T-l orientally, and then transformed into E.coli BL21(DE3) cells. The monoclone were selected and identified by means of restriction analysis, PCR and sequencing. As the result, the two recombinant plasmids with the different DNA fragements of the PrP gene were constructed and designated as pMY01[Ov rPrP(23-244)] and pMY02[Ov rPrP(91 -244)], respectively.

挑选单个菌落，提取重组质粒，经酶切、PCR扩增后琼脂糖凝胶电泳分析和测序鉴定，成功地构建了2种绵羊重组朊蛋白的表达质粒pMY01[OvrPrP(23～244)]和pMYO2[Ov rPrP(91～244)]。

01 Ordinary pimpled rubber is a single layer of non-cellular rubber, natural or synthetic, with pimples evenly distributed over its surface at a density of not less than 10 per sq.

颗粒胶是单层无泡沫的天然合成橡胶，其颗粒应平均分布布整个表面，每平方公分不得少於10粒、亦不得多於30粒。

The results show the Boer goat oocyte and pre-implantation embryo are telomerase positive. According to the densitometry of bands under the CCD imagine system, the total telomere repeats product generated of oocytes, 4-cell, 8-cell, morulae and blastocyst are 25.348, 273.832, 56.117, 251.118, 519.46, respectively.

结果表明波尔山羊卵母细胞和早期胚胎都是端粒酶阳性；依据电泳条带在凝胶成像系统下的光密度计算相对总产品产量定量比较发现，卵母细胞最低为25.348，4-细胞为273.832，至8-细胞又降低到56.117，随后快速升高，桑椹胚为251.111，囊胚端粒酶活性最高为519.46。

To master fluid mosaic model of cell membrane;peripheral proteins and integral proteins;the type of extracellular matrix;Collagen;glycosaminoglycan and proteoglycan;elastin; Occliding junctions;anchoring junctions;desmosome hemidesmosome、the structure and function of adhesion belt and focal adhesion;cell coat;cadherins;selectin;Ig-superfamily; integrins

掌握生物膜的流动镶嵌模型；膜周边蛋白和膜内在蛋白；细胞外基质的类型；胶原纤维；糖胺聚糖和蛋白聚糖；弹性蛋白；封闭连接；锚定连接；桥粒与半桥粒、粘着带与粘着斑的结构与功能；细胞外被；钙粘素；选择素；免疫球蛋白超家族；整联蛋白

The minor core protein s C-encoding gene of Muscovy duck reovirus was cloned into theprokaryotic expression vector pET32a. The recombinant plasmid pET32a-s C was amplified andextracted after being transformed into E.coli DH5a competent cells. Restriction analysis withEcoRⅠand SacⅠand sequences analysis indicated that the recombinant plasmid was inserted withcorrect open reading frame. The fusion protein about 50 ku was produced after induction with 0.15mmol/L IPTG of E.coli competent cells transformed with pET32a-sC. The SDS-PAGE andWestern-bloting test indicated that the fusion protein reacted with the convalescents sera of duckinfected with Muscovy duck reovirus. The indirect ELISA method was developed by using thepurified fusion s C protein as coating antigen. The optimal concentration of s C was 5μg/ml, thedilution of serum sample was 1:40; The results showed that preparation of an ELISA by using sCas coating antigen in detecting 50 field duck sera in comparison with the AGIP were more sensitiveand specific than agar gel immuno-diffusion AGIP test. The results suggest that presence ofantibody against viral protein sC in duck may be a good indicator by the sC-ELISA for detectionof duck infection with reovirus.

同时，本研究将编码外壳蛋白σC的基因克隆于原核表达载体pET32a上，经过EcoRⅠ和SacⅠ双酶切鉴定和序列分析后，得到阳性重组质粒pET32a-σC；将阳性重组质粒pET32a-σC转化到大肠杆菌BL-21感受态细胞中进行诱导表达，经SDS-PAGE和Western-blbtting检测分析，融合表达的蛋白能够与番鸭呼肠孤病毒感染的康复鸭血清发生特异性反应；将融合表达的蛋白纯化后作为包被抗原，建立了检测鸭血清中呼肠孤病毒抗体的间接酶联免疫吸附试验检测方法，此方法中抗原的最佳包被浓度为5μg／ml、标准阳性血清的最适稀释倍数为1：40倍，用此方法对50份鸭血清样品进行检测，并与琼脂糖凝胶扩散试验检测抗体的法相比较，证明此ELISA方法具有良好的特异性和敏感性，本研究为今后鸭呼肠孤病毒诊断试剂盒的研制奠定了基础。

He results show that the virus regained infectivity, and the tannins did not direct viricidal effect. Tannins extracted from Polygonum perfoliatum or Archontophoenix alexandrae seeds showed strongly anti-TMV activities separately. TMV virions seems to be aggregated when TMV incubated with the tannins by electron microscope. It seems that TMV coat protein bind to the tannins based on PAGE. Tannins did not reduce infectivity when applied either before or after TMV inoculation. It is proposed that tannins extracted from the 11 species inhibited TMV by binding with TMV coat protein to interfere with recognition site essential for viral coat protein. Tannins extracted from Euphorbia hirta, P. perfoliatum, P. cuspidatum reduce infectivity when applied immediately in N.

MV分别与这11种植物单宁混合后，通过透析除去单宁后，可恢复大部分侵染力，表明单宁对病毒粒体并无直接毒害作用；TMV与杠板归和假槟榔种子中提取的单宁分别混合后，电镜下观察粒体呈现明显的聚集现象；TMV外壳蛋白分别与这两种植物单宁混合后，聚丙烯酰胺凝胶电泳中CP泳带滞后；单宁在病毒接种前施用未降低TMV对叶片的侵染能力；这些结果表明植物单宁对TMV抑制作用可能是单宁与TMV-CP结合影响病毒对叶片侵染位点的识别而降低TMV侵染性，而这种结合是可逆的。

The total proteins from TGIF transfectant and vector control cells were separated by 2D electrophorosis. 760±41 and 680±38 spots were detected in TGIF transfectant and vector control cells respectively. Locus repeat analysis of protein spots showed that the mean deviation in IEF direction in TGIF transfectant and vector control cells were 0.864±0.123 mm and 0.843±0.115 mm respectively whereas the mean deviation in SDS-PAGE direction in these two cells were 0.812±0.109 mm and 1. 125±0.123 mm respectively. So the well-resolved and reproducible 2DE patterns from TGIF transfectant and vector control cells were established.

通过双向凝胶电泳分别分离TGIF转染细胞和PcDNA3.1空白质粒转染细胞的总蛋白质，测得两组细胞的蛋白质斑点数分别为760±41和680±38个；位置重复性分析表明TGIF转染细胞在等电聚焦方向上的平均偏差为0.864±0.123mm，在垂直板SDS-PAGE电泳方向上的平均位置偏差为0.812±0.109mm；PcDNA3.1空白质粒转染细胞在IEF方向上的平均偏差为0.843±0.115mm，在垂直板SDS-PAGE电泳方向上的平均位置偏差为1.125±0.123mm。

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。