查询词典 benzene

Substitutes on benzal benzene ring of BFP have different effects on ·OH scavenging activity in vitro. 2-Cl,3-Cl,2-CH3,4-CH3 and 3-OCH3 may enhance the activity. 3-CH3 may not change the activity. 2-OCH3 and 4-OCH3 may reduce the activity.

BFP苄基苯环上2-Cl、3-Cl、2-CH3、4-CH3、3-OCH3取代，可增强体外清除·OH活性；3-CH3取代，体外清除·OH活性基本不变；2-OCH3、4-OCH3取代，体外清除·OH活性降低。

Compared with thermal cracking of JP-10, the conversion ratio of the catalytic cracking in the temperature range from 500 to 650 ℃ is evidently enhanced. The predominant products of the catalytic cracking are methane, ethane, ethylene, propane, propylene, benzene and benzenoid hydrocarbons.

在500～650 ℃温度范围内，与热裂解相比，分子筛催化可显著提高裂解转化率，主要产物有甲烷、乙烷、乙烯、丙烷和丙烯，以及苯和苯的同系物等。

At least one major DNA adduct was detected in the bone marrow of mice treated with benzene,phenol,hydroquinone,benzoquinone respectively and coadministration of phenol and hydroquinone.

我们采用改进的32P后标记法，对苯及其代谢产物苯酚、氢醌、苯醌及苯酚和氢醌联合染毒在小鼠骨髓中形成DNA加合物的情况进行了初步研究，以探讨苯及其代谢产物的髓性毒作用。

The result indicates that the benzene ring and naphthalin ring in the eriochrome black T molecule is degraded to organic acid and benzoquinone, and further becomes inorganic substances by chlorine dioxide direct oxidation and catalytic oxidation, which is good for the further treatment of the refractory bio-degradation wastewater.

结果表明，铬黑T经化学氧化和催化氧化后，分子中苯环和萘环被氧化分解为羧酸和苯醌，并进一步分解为无机物，为难降解废水的后续处理创造了条件。

The results of bioassay suggest that 2-methylthio-6-methyl-4-substituted pyrimidine and 4, 6-dimethoxy-2-substituted pyrimidine derivatives show herbicidal activity. In these target compounds, 4, 6-dimethoxy-2-substituted pyrimidine benzylamine and 4, 6-dimethoxy-2-Substituted pyrimidine benzylidene amine exhibit good herbicidal activity, and the herbicidal will be affected by the substituents in the benzene ring.

对分子库中的目标分子进行了生物活性筛选研究，发现其中的2-甲硫基-6-甲基-4-取代嘧啶衍生物和4，6-二甲氧基-2-取代嘧啶类化合物显示出除草活性，其中4，6-二甲氧基-2-取代嘧啶苄胺类化合物和4，6-二甲氧基-2-取代嘧啶亚苄胺类化合物具有较好的除草活性，而且其活性和苯环上的取代基有关。

To our surprise we achieved the ligand 9, 11 and 29 with coordinating atoms fixing at benzylic and benzene ring positions, whose structure is unique in the planar chiral cyclophane chemistry.

以钯催化的烯丙基取代反应对配体进行了考察，硫醚或硒醚取代基在苄位取代的配体表现出更高的反应活性和更高的对映选择性，配体9和11均给出最高为94％的ee值。

The introduces binaphthyl bisphenol monomer on side-chain benzene ring of sulfonic group on molecular level, prepares sulfonated poly aryl ether with sulfonic group only on naphthalene ring of side chain, so that ensures chemical stability of main chain with high molecular weight, while having no influence on mechanical property thereof.

本发明从分子水平出发，将磺酸基在侧链苯环上的联萘双酚单体引入，制备仅在侧链苯环上有磺酸基的磺化聚芳醚，从而保证了高分子主链的化学稳定性，且不会影响其优异的物理机械性能。

A series of crosslinked sulfonated polys were synthesized from 4,4'-difluorodiphenyl sulfone, 4,4'-biphenol, 3,3'-disulfonate-4,4'-difluorodiphenyl sulfone and 1,3,5-trihydroxy benzene by nucleophilic substitution polycondensation reactions. The trifunctional crosslinker of THB was in the mass fraction range of 3%-7%.

以4，4'-二氟二苯砜、4，4'-联苯二酚、3，3'-二磺化－4，4'-二氟二苯砜二钠盐和三羟基苯为原料，经高温溶液缩聚反应，制备了一系列不同磺化度的新型交联磺化聚芳醚砜。

Sulfonated poly are prepared by direct polymerization of biphenol A, disodium 4, 4"-difluoro-3, 3"-disulfonate-1, 1-diphenylsulfone and 1, 3-(4-difluorophenyl)benzene. The polymers are characterized with ~1H-NMR, FT-IR.

以双酚A，1，3-二(4-氟苯基)苯和4，4′-二氟-3，3′-二磺酸钠-1，1′-二苯砜采用直接缩合法合成了不同磺化度的磺酸型聚芳醚酮砜，通过FT-IR和~1H-NMR对聚合物进行了表征，证明其结构正确。

Poly with sulfonic acid groups were readily synthesized with biphenol and 1,3-bis(4-fluorobenzoyl)benzene in the presence of excess potassium carbonate followed by sulfonation with chlorosulfonic acid.

以二氯二苯甲烷和2，6-二甲基苯酚为原料合成了含有阻碍基团的双酚单体，用此双酚单体和1，3-二(4-氟苯甲酰基苯)在无水碳酸钾存在的条件下反应制得聚芳醚酮，然后用氯磺酸磺化，控制反应条件，使磺酸基团恰好进入苯环对位，制得新型结构的磺化聚芳醚酮。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。