查询词典 M-B

The extracts are proanthocyanidins identified by anthocyanidin reaction and JR-spectra. Number-average molecular weight M(subscript n of the extracts are respectively 1705 (95%) and 798 (5%) determined by GPC and VPO.

用凝胶渗透色谱法和蒸汽渗透压法测定产物的相对分子质量M(下标 r及其分布，产物中95%以上组分的数均相对分子质量M(下标 n为1705（相当于聚合度4~5），其余组分的M，为798。

E. cansus, E. baileyi, E. rufescens, M. aspalax and M. psilurus were all proved to be of valid species.

并证明凸颅鼢鼠属的甘肃鼢鼠E.cansus、高原鼢鼠E.baileyi和秦岭鼢鼠E.rufescens、以及平颅鼢鼠属的草原鼢鼠M.aspalax和东北鼢鼠M.psilurus均为有效种。

Results:β-L-D4A was successfully synthesized and confirmed by IR, NMR and MS. Autoradiographic bands showed similar for supernatant and intracellular HBV DNA. Episomal HBV DNA was inhibited in a dose-dependent manner. EC50 of 3 -L-D4A was 0.2 μM. The experiment of cytotoxicity gained its IC_(50) 200 μM.

结果经一系列步骤合成的化合物β-L-D4A经红外光谱、质谱和核磁共振谱鉴定正确；2.2.15细胞培养上清液病毒DNA的Southern印迹、自显影结果显示药物对病毒的抑制呈明显的浓度依赖性，计算出EC_(50)为0.2μM；细胞毒性实验显示IC_(50)为200μM。

Micrometer-sized m esoporous silica spheres (1.5～4 μm) with smooth surfaces, which have an avera ge pore size of 3 2 nm and a BET surface area of 972 m 2/g, can be prepared at 1∶1 weight ratio between EO 20 PO 70 EO 20 and CTAB.

在EO20PO70EO20与CTAB质量比为1：1时可得到形貌完好、表面光滑的介孔氧化硅微米球(1.5～4μm)，其平均孔径为3.2 nm，比表面积为972m2/g。

Experimental results show that in asymmetric flat-flat resonators, when the laser crystal′s position is varied relative to two cavity mirrors, the output power changes in different way, and the radially polarized and azimuthally polarized focal lengths are 31.76 m·W, 42.26 m·W measured respectively.

实验结果表明，在非对称平-平腔中，当激光晶体相对于两面腔镜位置不同时，谐振腔输出功率会出现不同的变化趋势，测量出径向热透镜系数为31.76 m·W和切向热透镜系数为42.26 m·W。

Moreover, the range of m is obtained when G is a forest, a unicyclic graph, a bicyclic graph, a tricyclic graph and a tetracyclic graph, respectively, and the graph is determined when m(≥1) takes different value in its range.

给出了当G是森林、单圈图、双圈图、三圈图、四圈图时m的取值范围，并确定了m(≥1)在该取值范围内取不同值时的所有图。

On strength computation,the finite element models of rotating mirror were established according to the real structure of the mirror,and the rotating three-faced beryllium mirror were analysed.Results display that the surface deformation magnitude of the mirror is approximately 0.334 6 μm,and the maximum stress is 0.204 GPa at 600 m/s of edge linear speeed.The regions of maximum stress are on the axial hole and symmetric to symmetrical planes of mirror body,and keep beelines to surfaces.On the modal analysis,the results show that the first and second modals of bending vibration exist around 3.4×105 r/min and 6.6×105 r/min,which appear binate and orthogonal respectively,and another modal belongs to the first torsional vibration that occurs by 5.13×105 r/min.

运用该方法得出转镜镜面变形量、内部应力分布和振动模态参量的定量数值：在边缘线速度600 m/s下，三面体铍转镜的最大变形量为约0.334 6 μm；最大应力0.204 GPa，位于轴孔附近并与镜面距离最短处；两个在互相垂直平面内的一阶弯曲振动模态发生在3.4×105 r/min附近，一阶扭振点位于5.13×105 r/min附近，两个二阶弯曲振动点位于6.6×105 r/min附近。

Novel sodium 2-2-(alkylaryloxy-alkylamidoethanesulfonates (m+nAr-T, m, n: carbon numbers; Ar: aromatic nucleus; T: taurine) with high purity were synthesized through bromization, esterification, Fries rearrangement, Pd-catalyzed hydrogenation, Williamson reaction, and acylation, et al, using carboxylic acid, phenol and taurine as starting materials. The structures and purities were characterized.

以羧酸、苯酚和牛磺酸为原料，通过溴代反应、酯化反应、Fries重排反应、催化氢化反应、Williamson反应以及催化酰胺化反应等过程，首次成功合成并表征了系列结构明确的高纯度N-酰基牛磺酸钠(m+nAr-T，m、n为烷基链碳数，Ar为芳环，T表示taurine)。

High-resolution transmission electron microscopy of biosilica in silica cells, bulliform cells and long cells of rice epidermal systems revealed that silica bodies are made up of rods about 2. 0-3. 0 μm in length and 0.2-0.5 μm in width.

借助高分辨电镜研究水稻叶外表皮系统中的SiO〓和细胞壁基质作用时发现在硅细胞、泡状细胞和外表皮长细胞腔中SiO〓是以长 2.0-3.0μm宽0.2-0.5μm的微杆状结构团聚而成。

To explore the effects of exogenous nitrogen input on the enzyme activity of Calamagrostis angustifolia during litter decomposition in a freshwater marsh, we supplied dissolved NH4NO3 (N0:0; N1:6 g·m-2·a-1;N2:12 g·m-2·a-1) to field plots on the Sanjiang Plain and determined the enzyme activities of litter decomposition within 160 d using litter bags.

以三江平原沼泽湿地典型湿地植物小叶章枯落物为研究对象，采用分解袋法研究了不同外源氮输入(N1、 N2分别为 6 、12g·m-2·a-1)对小叶章枯落物分解过程酶活性的影响，并设置对照区（N0，0 g· m-2·a-1）进行比较。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。