钛

The titanium dioxide is one kind of important industrial chemicals, mainly has the brookite, Rutile and anatase three crystal seeds.

二氧化钛是一种重要的化工原料，主要有板钛矿、金红石和锐钛矿三种晶型。

Bismuth titanate submicron-rods are synthesized by hydrothermal method using anatase and brookite nanocrystallites, respectively, as precursors.

分别以板钛矿和锐钛矿型的TiO2为先驱物水热合成钛酸铋亚微米棒。

1The nanocrystalline TiO2 film is prepared by sol-gel and appearance of the film is observed by SEM. The X-ray graph shows the film has lots of anatase and a few rutile TiO2, but does not have brookite TiO2. The average diameter of particle is 25nm according to Scherrer formula.

采用溶胶-凝胶法制备了纳米晶二氧化钛薄膜，通过扫描电镜观察了其形貌，X射线衍射表征显示出制备的薄膜具有大量的锐钛矿晶型和少量的金红石晶型，不含有板钛矿晶型，根据Scherrer公式计算出薄膜的晶粒的平均尺寸为25nm。

Using the aforementioned experimental methods,the author has performedcareful study on the thermoanalytical characteristic of nanocrystalline brookite-basedTiO2,and found that on the DTA curve there exists a small irreversible endothermicpeak,which is related to the dramatic structural phasetransformation from brookite to anatase then to rutile.

利用上述实验手段，作者首次对板钛矿基(brookite-based)纳米TiO2的热分析特性进行了较系统、深入的研究，发现在DTA曲线上存在一较小的不可逆、无失重吸热峰，对应于从板钛矿经锐钛矿到金红石的急剧转变。

Nanosized titania particles consisting of anatase, rutile and brookite phases were synthesized under solvothermal conditions with different alcohols as solvents, hexamethylene tetramine as precipitant as well as precursor of titanium trichloride.

采用不同的醇溶剂，以六亚甲基四胺为沉淀剂，以TiCl3为前驱体，通过溶剂热的方法控制合成出纳米级的锐钛矿型、金红石型和板钛矿型的二氧化钛。

ESCA analysis indicates that the surface film for the specimen in prescruber is calcium carbonate,but titanium nitrate for the specimen in heater.

ESCA分析结果得知：在加热器位置中钛生成硝酸盐，在除尘塔位置中钛表面未发现钛化物而有碳酸钙厚膜覆盖。

The results showed that Ti-bone tissue was integrated closely in a very reactive manner. Both physical and chemical integration occurred in the Ti-bone interface.

结果表明，纯钛种植体与骨结合十分紧密；钛与骨组织间的离子作用是相互的；钛—骨间既存在物理性结合，也存在化学性结合。

Professional processing of all kinds of stainless steel mixing tank, stainless steel (2520) sintered crucible, stainless steel hydrogenation cans, stainless steel cabinet, cabinets, grinding machine, the ball mushroom machine, mixer, aluminum parts processing and welding, and titanium and titanium clad steel plate chemical processing equipment, sealing cans, mixing tank, reactor, heat exchanger, titanium crucible.

专业加工各种不锈钢搅拌罐，不锈钢(2520)烧结坩埚，不锈钢氢化罐，不锈钢箱体，柜子，磨筛机，球蘑机，混料机，铝件的加工和焊接，及钛和钛复合板的化工设备加工，密封罐，搅拌罐，反应釜，换热器，钛坩埚。

These dendritic NOBIN derived Schiff base ligands have been applied to titanium catalyzed hetero-Diels-Alder reaction of Danishefshy's diene and aldehydes, affording the corresponding 2-substituted 2, 3-dihydro-4H-pyran-4-one in quantitative yields and excellent enantioselectivities (up to 97. 2%ee). Comparing the reactivities and enantioselectivities of reaction catalyzed by the titanium complexes of these Schiff base ligands, it was found that a series of ligands L〓 were superior to the other three series of ligands L〓, L〓 and L〓, a significant positive NLE and a dendrimer effect existed in the L〓 dendritic catalyst system. The disposition of the dendritic wedges and the dendron size in the ligands were observed to have a significant impact on the enantioselectivity of the reaction.

NOBIN衍生的树枝状大分子希夫碱手性配体与钛形成的配合物在催化不对称杂Diels-Alder反应中的应用将得到的四个系列NOBIN衍生的树枝状希夫碱三齿手性配体与四异丙氧基钛形成的配合物用于催化Danishefsky's diene与醛的不对称杂Diels-Alder反应，通过反应条件的优化，获得了定量的收率和最高达97.2％ee值的对映选择性；考察了这四个系列NOBIN衍生的树枝状希夫碱钛配合物的催化活性和对映选择性，结果发现它们的活性次序依次为L〓≈L〓＞L〓＞L〓，对映选择性次序依次为L〓＞L〓＞L〓＞L〓。

The deuterium desorption behavior of titanium deuteride with oxide layer on the surface in a constant volume system was investigated in the temperature range of 873 to

测定了3种不同氧化层厚度的氘化钛在873～1073K范围内的热解吸反应速率常数，得到673K下氧化5、2h的氘化钛和未经氧化处理的氘化钛热解吸氘的活化能分别为29。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。