甲苯

The photoisomerization of transvitamin D3 to cisvitamin D3 was carried out with this heterogeneous photosensitizer in ethanol and toluene solutions.

利用此固相光敏剂分别在乙醇和甲苯溶液中敏化反式维生素D3。

Amino-monomethoxypoly(ethy1ene glycol)(mPEG-NH2) was synthesized based on the principle of Gabriel synthesis.Monomethoxypoly(ethy1ene glycol) tosylate was prepared at first,and then reaction with potassium salt of phthalimide as nucleophile to produce the monomethoxypoly(ethy1ene glycol)phthalimide derivative.

摘 要：首先合成了单甲氧基聚乙二醇对甲苯磺酸酯，然后根据盖布瑞尔合成法原理，以邻苯二甲酰亚胺钾盐为亲核试剂与mPEG-OTs反应，生成单甲氧基聚乙二醇的邻苯二甲酰亚胺衍生物，mPEG-PI与水合肼反应肼解生成伯胺，合成了一端为氨基的单甲氧基聚乙二醇(mPEG-NH2)。

Kinetic reaction behavior of neo- polyhydric alcohols with fatty acids catalyzed by sulfuric acid was studied.

比较了Brnsted酸，包括硫酸、磷酸、对甲苯磺酸，催化季戊四醇与脂肪酸的酯化反应行为，结果表明，硫酸催化酯化反应速率最快，能有效催化不同类型的新戊基多元醇与脂肪酸的酯化反应，羟基转化率达到98%以上。

The energy content of the preconcentrate of the example could be increased by the addition of other explosives such as trinitrotoluol.

加入其它炸药，例如三硝基甲苯，可使所列举的预浓缩物的能量增加。

Novel synthesis technology of trimethylbenzoquinone by catalytic oxidation of pseudocumene ;2. The 7 000 TPY pseudocumene unit in PetroChina Fushun Petrochemical Company is a grassroot plant.

中国石油抚顺石油化工公司石化三厂7 kt/a偏三甲苯装置为新建装置，自2003年9月开工以来，装置热源系统及设备在设计上存在问题，安全生产出现困难。

This topic made a selection and a more detailed design calculation for the Oxide reactor according to the known technical parameters, which is the core equipment for sym-Tetramethyl benzene catalyzed oxidated to Pyromellitic Dianhydride , and made a detailed description about the manufacturing process of the reactor.

本课题根据已知的均四甲苯催化氧化法制取均酐的最佳工艺参数，对其核心设备氧化反应器进行了结构选型和较为详细的结构设计计算，并对反应器的制造工艺进行了详细的说明。

Methods:Purchased spherical silica particles (5 μm) were refluxed in anhydrous toluene with vinyl-triethoxysilane for 18 h, to modify the surface with vinylsilyl groups.

将商品球形硅胶颗粒(粒径5μm)与乙烯基三乙氧基硅烷通过在无水甲苯中回流18 h，进行硅烷化修饰。

The mechanism of formation of light-end products during M-HyPy was discussed.The results indicated that higher concentration and yields of BTX,PCX and naphthalene were found in M-HyPy as compared to HyPy,which is resulted from promoting hydrogenation and inhibiting repolymerization of free radicals due to the retention of hydrogen in M-HyPy.

结果表明：煤的多段加氢热解过程所得油品与传统的单段加氢热解油品相比，含有更丰富的高经济价值组分，如苯、甲苯、二甲苯和酚、甲酚、二甲酚及萘，这主要是因为氢气在峰温处的停留促进了自由基的氢化饱和及抑制了其再聚合的反应。

A new fullerene derivative containing energy-producing groups was prepared, and the reaction conditions affecting the yield were studied by the kroenecker method. The optimal reaction conditions with a 53.5% yield (based on consumed C60) are: 1:3:6 of molar ratio of C60 , o–nitrobenzaldehyde and sarcosine , 55℃ of reaction temperature, 12 h of reaction time, 40mL of toluene solvent.

利用N-甲基甘氨酸、邻-硝基苯甲醛和C60反应，合成分离出了含有硝基的新型富勒烯吡咯烷衍生物，通过正交试验对其工艺条件进行了研究，探讨了反应物剂量比、温度、时间和溶剂体积对产物产率的影响，得到了合成产物的最佳工艺条件：反应物剂量比为1：3：6、温度为55℃、反应时间为12h、溶剂甲苯体积为40mL，此时产物产率可达到53.5%（以消耗的C60计）。

The liner for double-based propellant was prepared from HTPB,toluene diisocyanate,diisooctyl sebacate,1,4-butanediol and mica.

以端羟基聚丁二烯、癸二酸二异辛酯、1，4 丁二醇、绢云母、甲苯二异氰酸酯等为原材料，制备了双基药柱用包覆层。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。