介

Scanning electron microscopy observed that the mesoporous silica single crystal had a regular rhombic dodecahedron morphology with a uniform particle size of 5 μm.

扫描电子显微镜观察到这种介孔二氧化硅单晶具有菱形十二面体形貌， X射线衍射和透射电子显微镜测试结果证实这种介孔单晶属于简单立方Pm3n对称结构。

The results show that there are some function relationships between the dielectric constant of solvent and the intensity ratio of Fermi resonance.And the empirical formula was obtained by curve fitting.

研究发现溶剂的介电常数与费米共振的强度比之间存在一定的函数关系，通过曲线拟合得到费米共振的强度比与溶剂介电常数之间关系的经验公式。

With the competent germinating epicotyl of cotton as receptor in exogenous gene transformation, NPTII (neomycin phosphotransferase Ⅱ) gene carrying selection marker and GFP reporter gene were mediated into cotton by agrobacterium-mediated transformation. The pre-culture time, bacterial-immersing time, co-culture time and antibiotics concn., etc of using agrobacterium-mediated transformation in the transformation of competent germinating epicotyl of cotton were studied.

方法］以棉花感受态萌动的上胚轴作为外源基因转化的受体，用农杆菌介导法将携带有筛选标记NPTII基因及GFP报告基因导入棉花，研究了农杆菌介导法用于棉花感受态萌动上胚轴转化的预培养时间，浸菌时间，共培养时间及抗生素处理浓度等。

MethodWiththe competent germinating epicotyl of cotton as receptor in exogenous gene transformation,NPTIIgene carrying selection marker and GFPreporter gene were mediated into cotton by agrobacterium-mediated transformation.The pre-culture time,bacterial-i mmersing ti me,co-culture ti me and antibiotics concn.,etc of using agrobacterium-mediated transformationinthe transformation of competent germinating epicotyl of cotton were studied.

方法以棉花感受态萌动的上胚轴作为外源基因转化的受体，用农杆菌介导法将携带有筛选标记NPTII基因及GFP报告基因导入棉花，研究了农杆菌介导法用于棉花感受态萌动上胚轴转化的预培养时间，浸菌时间，共培养时间及抗生素处理浓度等。

Also there is much difference between the obtained metastable phase diagram at 35 ℃ and the metastable phase diagram at 25 ℃. The crystallization regions of schoenite(K2SO4*MgSO4*6H2O) and epsomite disappear and arise the crystallization regions of leonite and kainite.

所得35 ℃介稳相图与25 ℃介稳相图区别很大：软钾镁矾和七水硫酸镁结晶区域消失，同时出现了钾镁矾和钾盐镁矾的结晶区域。

The enhancement of dielectric constant is due to the local concentration of equipotential lines when displacement current is dominant at low frequencies.

等效介电常数的增强和介质各组分电导率的差异有关；等效电导率的增强和介质各组分介电常数的差异有关。

It is revealed that the maximum refractive index modulation coincides with the widest band gaps and the optimum volume fraction of the atoms is structure independent. The photonic bands of the face centered cubic ...

文中还计算了由各向异性介电小球构成的面心立方结构的光子能带并看到了禁带，这与各向同性介电小球构成的面心立方结构很不相同。

The ranged from 0.8 to 0.9 and the geometric mean ranged from 1 (1.7) to 4 (2)μm.

其光谱间的R2值介於0.8至0.9，回推的几何平均数介於1(1.7)至4(2)微米。

Pike protein consists of S1 and S2 subunit. S1 is head and S2 is rod-shape part, intermolecular effort can bind each other. S1 can bind with host cell epimembranal acceptor. S2 can fix integral Spike protein on the cellular membrane and mediate cell-fusion with virus and host cell. There are significant antigen determinant of virus in Spike protein, genic heterogenesis can effect viral pathogenicity. SARS-CoV Spike protein, which has 23 pieces larvaceous glycosylation sit, consists of 1256 amino acid. Its N-terminals and C-terminals is corresponding conservative.

蛋白是I型膜糖蛋白，介导病毒与宿主细胞膜上的受体结合并与宿主细胞膜相融合。S蛋白由S1和S2两个亚基组成。S1形成球状部分，S2形成棒状部分，两者之间通过分子间的作用力相互结合。S1能与宿主细胞上的受体结合，S2可把整个S蛋白固定在细胞膜上，并介导病毒包膜与宿主细胞膜融合。S蛋白上有重要的病毒抗原决定簇，S基因的突变会影响病毒的致病性。

The ordered mesoporous material MCM-41 was synthesized by a hydrothermal method using fumed silica,sodium hydroxide/tetraethyl ammonium hydroxide/hydrogen chlorideand cetyl trimethl ammonium bromide.

用X射线衍射、氮气吸附-脱附等手段对比分析了合成的3种MCM-41介孔材料的物相、比表面积、孔径、孔体积等，发现酸性介质中合成的介孔材料的孔径最大。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。