查询词典 B

Accordingly, in the original reaction (formation of B from cyclopentadiene and benzoquinone) Diels and Alder found only one of the following six conceivable stereoisomers of B.

因此，在该原始反应中(即通过P-苯醌和过量的环戊二烯生成B)，Diels and Alder发现在他们推测的六个立体异构中，只有一个出现。

As a continuation of our previous research on syntheses of tetrahydrofuro[3,2-b]furan-1(5H)-one, Dr. Zhang Yi-Jun started the total synthesis of pallavicinin B in 2002, and made strategic achievement in building the bicyclo[3.2.1]octane skeleton.

基于我们小组多年来对具有四氢呋喃并γ-丁内酯子结构的天然产物全合成研究的兴趣，从我们小组张怡隽博士就已经开始了pallavicinin B的全合成研究，并取得了阶段性的进展：成功构建了骨架中下半部的二环[3.2.1]辛酮。

Results Of 4 cases breast MALT-ML, 2 were CCL type, 1 CCL type with blastoid transformation, monotoid Bcell type. By immunohistochemistry, all cases were monoclonity of B-cell with follicular colonization and lymphoepithelia lesions.

结果：4例乳腺MALT-ML中2例为CCL细胞型，1例为CCL细胞型向母细胞样转化，另1例为单核样B细胞型。4例均显示B细胞单克隆性及滤泡克隆化和淋巴上皮病变。

The structural and photocatalytic properties of TiO〓 as well as surface acidity were greatly improved by sulfation. SO〓〓/TiO〓 solid superacid with Hammett constant Ho less than -12.14 was prepared by treating the TiO〓 with 1.0mol. L〓 sulfuric acid solution and then calcining at 450℃ for 3h. When compared to unmodified TiO〓, the SO〓〓/TiO〓 superacid catalyst exhibited higher anatase content, smaller crystal size, higher specific surface area, centralized pore size distribution, and the blue-shifted band edge of uv-vis adsorption spectra. Furthermore, the SO〓〓/TiO〓 superacid also showed excellent reaction activity and stability for CH〓Br photocatalytic decomposition even under the moist reaction conditions. The apparent quantum efficiency of SO〓〓/TiO〓 was 10 times of that of TiO〓 catalyst for the photocatalytic degradation of bromomethane. Therefore, the SO〓〓/TiO〓 superacid catalyst is promising for practical application in environmental remediation.It was found that both L and B acid sites exist on SO〓〓/TiO〓 photocatalyst while only L acid sites on TiO〓 photocatalyst. On the basis of experimental results, the synergistic model of superacidic centers was proposed for SO〓〓/TiO〓 photocatalyst to explain the photocatalytic behavior and the mechanism of superacidifing effects, assuming that the adjacent L and B acid sites induced by SO〓〓 comprise cooperatively the superacidic center on superacid photocatalyst. The group cooperation of the superacidic center could strengthen the surface acidity, increase surface acid sites and the adsorbtion of O〓, promote separation of photogenerated electron-hole pair, enhance the interfacial transfer of charges and reversibility of water adsorption. Consequently the excellent photocatalytic activity, reaction stability and resistibility to humidity of SO〓〓/TiO〓 superacid photocatalyst may attributed to the group cooperated effect of the superacidic center on the photocatalyst.

研究结果表明：SO〓〓与TiO〓表面的结合为螯合式双配位结构；TiO〓光催化剂表面经H〓SO〓浸渍处理后，提高了表面酸性，改善了催化剂结构和光催化性能，当H〓SO〓浸渍浓度为1.0mol.L〓、烧结温度为450℃时，可制得SO〓〓/TiO〓超强酸催化剂(H〓＜-12.14)，其结构和光催化活性得到明显改善，与TiO〓相比，SO〓〓/TiO〓光催化剂的锐钛矿含量高、晶粒小、BET比表面积大、孔径分布集中、光谱吸收边蓝移，具有优异的光催化氧化活性、稳定性及抗湿性能，光催化降解溴代甲烷的表观量子效率比TiO〓催化剂提高了一个数量级，是一种有实际应用前景的高效光催化剂；由此提出了SO〓〓/TiO〓超强酸催化剂表面集团协同作用的超强酸中心模型，认为在SO〓〓/TiO〓超强酸催化剂表面，由SO〓〓诱导的相邻L酸中心和B酸中心组成了集团协同作用的超强酸中心，其集团协同作用显著地增强了催化剂表面酸性、增大了表面酸量及O〓吸附量、促进了光生电子和空穴的分离及界面电荷转移，具有可逆吸附水的性能，是SO〓〓/TiO〓超强酸催化剂具有优异的光催化氧化活性、很好的活性稳定性及抗湿性能的重要原因。

The apparent quantum efficiency of SO〓〓/TiO〓 was 10 times of that of TiO〓 catalyst for the photocatalytic degradation of bromomethane. Therefore, the SO〓〓/TiO〓 superacid catalyst is promising for practical application in environmental remediation.It was found that both L and B acid sites exist on SO〓〓/TiO〓 photocatalyst while only L acid sites on TiO〓 photocatalyst. On the basis of experimental results, the synergistic model of superacidic centers was proposed for SO〓〓/TiO〓 photocatalyst to explain the photocatalytic behavior and the mechanism of superacidifing effects, assuming that the adjacent L and B acid sites induced by SO〓〓 comprise cooperatively the superacidic center on superacid photocatalyst. The group cooperation of the superacidic center could strengthen the surface acidity, increase surface acid sites and the adsorbtion of O〓, promote separation of photogenerated electron-hole pair, enhance the interfacial transfer of charges and reversibility of water adsorption. Consequently the excellent photocatalytic activity, reaction stability and resistibility to humidity of SO〓〓/TiO〓 superacid photocatalyst may attributed to the group cooperated effect of the superacidic center on the photocatalyst.

研究结果表明：SO〓〓与TiO〓表面的结合为螯合式双配位结构；TiO〓光催化剂表面经H〓SO〓浸渍处理后，提高了表面酸性，改善了催化剂结构和光催化性能，当H〓SO〓浸渍浓度为1.0mol.L〓、烧结温度为450℃时，可制得SO〓〓/TiO〓超强酸催化剂(H〓＜-12.14)，其结构和光催化活性得到明显改善，与TiO〓相比，SO〓〓/TiO〓光催化剂的锐钛矿含量高、晶粒小、BET比表面积大、孔径分布集中、光谱吸收边蓝移，具有优异的光催化氧化活性、稳定性及抗湿性能，光催化降解溴代甲烷的表观量子效率比TiO〓催化剂提高了一个数量级，是一种有实际应用前景的高效光催化剂；由此提出了SO〓〓/TiO〓超强酸催化剂表面集团协同作用的超强酸中心模型，认为在SO〓〓/TiO〓超强酸催化剂表面，由SO〓〓诱导的相邻L酸中心和B酸中心组成了集团协同作用的超强酸中心，其集团协同作用显著地增强了催化剂表面酸性、增大了表面酸量及O〓吸附量、促进了光生电子和空穴的分离及界面电荷转移，具有可逆吸附水的性能，是SO〓〓/TiO〓超强酸催化剂具有优异的光催化氧化活性、很好的活性稳定性及抗湿性能的重要原因。

This thesis regards the language fact of the sentence's type as the foundation , with the " hypothesis of pivotal status of clauses " as its theoretical basis , with many angles , with many aspects , and the quantitative and qualitative research method as the way of thinking , put forward the detailed depiction of the choosing sentence of "bushi A, jiushi B".

本文以&不是A，就是B&的语言事实为基础，以&小句中枢说&为理论依据，以多平面、多角度为研究思路和方法，以量化统计为研究手段，对&不是A，就是B&的一种类型——选择关系的句法形式、语法意义、语用功能、语体特征进行较为详尽的描写和归纳。

Among them,them of chickens treated with 10KV HVEF increased more significantly than other groups chickens;But the numbers and proliferative function of B lymphocyte in caecal tonsil and gland of Harderchickens treated with 20KV HVEF reduces more significantly than other groups chickens.

其中，10KV高压静电场照射雏鸡盲肠扁桃体和哈德尔氏腺B淋巴细胞增殖功能增强最显著，数量也增加也最为明显；而20KV高压静电场照射雏鸡盲肠扁桃体和哈德尔氏腺B淋巴细胞增殖功能降低最明显。

Methods From 1995.5 to 2004.11, 78 elderly patients of over 65 years old with displaced femoral neck fracture were operated with hip arthroplasty and AO compressive cannular. follow-up period of A ranged from 12 to 96 months(mean,40.3months).The follow-up period of B ranged from 12 to 91 months(mean,41.7month).

将1995年5月～2004年11月我院收治的78例年龄在65周岁以上的有移位的新鲜股骨颈骨折患者进行回顾性，将病例分为A、B两组，A组为人工关节置换组，B组为AO加压空心螺钉治疗组。

Methods From 1995.5 to 2004.11, 78 elderly patients of over 65 years old with displaced femoral neck fracture were operated with hip arthroplasty and AO compressive cannular. The follow-up period of A ranged from 12 to 96 months(mean,40.3months).The follow-up period of B ranged from 12 to 91 months(mean,41.7month).

将1995年5月～2004年11月我院收治的78例年龄在65周岁以上的有移位的新鲜股骨颈骨折患者进行回顾性研究，将病例分为A、B两组，A组为人工关节置换组，B组为AO加压空心螺钉治疗组。

Instead, the 26-year-old figured mostly in the Madrid B-team, Castilla, where he was made captain before being sold to Deportivo La Coruna.

相反，26岁的后卫却在皇马B队占据着重要的位置，在他转会到拉科鲁尼亚之前，他还是皇马B队的队长。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。