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promoters
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  启动子
     Analysis of Rice WRKY19 and WRKY89 Gene Promoters
     水稻WRKY19和WRKY89基因启动子的分析
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     Conclusions p53binds to promoters of p21 WAF1/CIP1 and hsp90βgene in viv o,and regulate s the expression of the two genes.
     结论p53蛋白在体内结合于p21WAF1/CIP1和hsp90β基因的启动子区,参与两基因的表达调控。
短句来源
     Methods: Tomato fruit-specific promoters’ gene 2A12 and E8 were respectively introduced to pBPFΩ7 to form pB2A12 and pBE8. The DNA fragment containing HBsAg-s gene from plasmid YEP-HBs was inserted respectively into pB2A12 and pBE8 to form pB2A12-HBs and pBE8-HBs.
     方法将番茄果实特异性启动子基因2A12和E8 ,分别插入到pBPFΩ7构建中间载体pB2A12和pBE8 ; 酶切YEP-HBs载体中的HBsAg小蛋白,并插入到pB2A12和pBE8 ,得到载体pB2A12-HBs和pBE8-HBs ;
短句来源
     The methylation analysis showed that methylation in the promoters of MAGE-A1 gene of HepG2 2.2.15, HepG2, QGY-7701 and Huh7 was high, and that methylation in those of SMMC-7721, HLE, BEL-7402, BEL-7404, and BEL-7405 was low.
     肝癌细胞株MAGE-A1 基因启动子区甲基化分析结果表明HepG2 2.2.15、HepG2、QGY-7701和Huh7为高甲基化,SMMC-7721、HLE、BEL-7402、BEL-7404、BEL-7405为低甲基化。
短句来源
     Results The p53binding sequences on the promoters of p21 WAF1/CIP1 and hsp90βgene were found in the p53antibody immunoprecipitated DNA fragments and p53was detected in the immunoprecipitated samples.
     结果在p53抗体免疫沉淀的DNA片段中含有p21WAF1/CIP1和hsp90β基因的启动子区p53蛋白结合序列,免疫沉淀样品中含有p53蛋白。
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  助剂
     Study on the Spectra of Au/α-Fe_2O_3 Catalysts Modified by ZrO_2 and Nb_2O_5 Promoters
     ZrO_2,Nb_2O_5助剂改性Au/α-Fe_2O_3催化剂的光谱研究
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     Study on the Spectra of Au/α-Fe_2O_3 Catalysts Modified by ZrO_2 and Nb_2O_5 Promoters
     ZrO_2,Nb_2O_5助剂改性Au/α-Fe_2O_3催化剂的光谱研究
     Investigation on Direct Oxidation of Ethylene to Acetic Acid Ⅱ. Effect of Promoters on Catalytic Performance of Pd-Se/H_4SiW_(12)O_(40)/SiO_2
     乙烯直接氧化制乙酸的研究 Ⅱ.助剂对Pd-Se/H_4SiW_(12)O_(40)/SiO_2催化性能的影响
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     Effect of Pt, Ru and Pd Promoters on the Performance of Co/γ-Al_2O_3 Catalysts for Fischer-Tropsch Synthesis
     Pt,Ru和Pd助剂对F-T合成中Co/γ-Al_2O_3催化剂性能的影响
短句来源
     Preparation and Characterization of Hydrotreating CatalystsⅠ. Preparation of MoNiP/Al_2O_3 and Effect of Promoters
     加氢处理催化剂的制备和表征Ⅰ.MoNiP/Al_2O_3催化剂的制备及助剂的作用
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  “promoters”译为未确定词的双语例句
     The Effect of Promoters Ca、Sr and Ba to CO Oxidation on the Co /γ-Al_2O_3 Catalyst (Ⅰ)
     Ba、Sr、Ca在Co/γ-Al_2O_3催化剂上CO氧化的作用机制(Ⅰ)
短句来源
     The Effect of Promoters Ca、Sr and Ba to CO Oxidation on the Co/γ Al_2O_3 Catalyst(Ⅱ)
     Ba、Sr、Ca在Co/γ—Al_2O_3催化剂上CO氧化的作用机制(Ⅱ)
短句来源
     Promoters and Sulfurizing Degree of Sulfurized WGS Catalyst K-Ni-Mo/Al_2O_3
     K-Ni-Mo/Al_2O_3耐硫变换催化剂硫化态与硫化度研究
短句来源
     Influence of La_2O_3 and CeO_2 Promoters on Physico-chemical Properties and Catalytic Performance of Ni/MgO Catalyst in Methane Reforming with Carbon Dioxide
     La_2O_3和CeO_2对CH_4-CO_2重整Ni/MgO催化剂结构和性能的影响
短句来源
     Addition of halide and alkali metal cation promoters greatly increases the catalytic activity in the following sequence: NaI/NaOH
     添加卤化物和碱金属阳离子极大地提高了催化活性并得到如下顺序:NaI/NaOH
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  promoters
coli host cells and β-galactosidase activity assay demonstrated that the BB0462 protein enhanced the transcriptional activity of the oppAV promoter, but does not affect those of oppAI, II, III and IV promoters.
      
Suppressor genes and genes of repair are inactivated in tumors due to their damage or methylation of their promoters (in the latter case an "epimutation", an epigenetic equivalent of a mutation, occurs, producing the same functional consequences).
      
Organic peroxides used in the chemical and pharmaceutical industries have a reputation for being potent skin tumor promoters and inducers of epidermal hyperplasia.
      
Also, hypermethylation of CpG-rich promoters of tumor suppressor genes in cancer has a critical role in downregulating expression of these genes and thus participating in carcinogenesis.
      
Such a deciphering, initially providing restriction minimaps of hypermethylatable promoters and introns vs.
      
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The reaction between aromatic acid halide and acetylene in the presence of aluminum chloride can be made to proceed smoothly by the addition of a small amount of mercuric chloride as a promoter. Phenyl-β-chlorovinylketone has been prepared in a good yield by the present method. Sulfuryl chloride reacts with acetylene under the same condition to give chlorosulphonyl vinyl chloride. Acyl chloride reacts with acetylene under this condition to give a much better yield increasing from 55% to 80-87%, and the...

The reaction between aromatic acid halide and acetylene in the presence of aluminum chloride can be made to proceed smoothly by the addition of a small amount of mercuric chloride as a promoter. Phenyl-β-chlorovinylketone has been prepared in a good yield by the present method. Sulfuryl chloride reacts with acetylene under the same condition to give chlorosulphonyl vinyl chloride. Acyl chloride reacts with acetylene under this condition to give a much better yield increasing from 55% to 80-87%, and the time required to complete the reaction is 2-2 hrs. and 20 mius. in contrast to 6 hrs. as required by the old method.The physical constants of phenyl-β-chlorovinyl ketone obtained by Nesme-jannoff and others are different from those obtained by the present method. This is probably due to the formation of two different geometrical isomers by the two different methods.

运用氯化汞为醯卤与乙炔加成时的促进剂,实现了芳香醯卤(苯甲醯氯为代表)与乙炔的反应,以良好的收率得到了苯-β-氯乙烯酮。实现了前人失败了的二氯砜与乙快的加成反应,制得了β-氯乙烯氯砜。以HgCl_2促进氯化乙醯与乙炔的反应时,加快了反应速度(6小时缩短至2点20分),提高了收率(从55%而达80—87%)。 用我们的方法所制得的苯-β-氯乙烯酮和用等的方法制得者物理常数不同。可能这二者的不同是由於反顺异构体的关系。

The work herein described resulted from the investigation on the Wohl-Zieglerreaction of para-methylanisole under different conditions.It was found that solventplayed an important role in the selective bromination.With carbon tetrachloride,side chain bromination was favored in 65% yield,while with glacial acetic acidring hromination was favored in 68% yield.During the reaction of N-bromosuc-cinimide(NBS)on anisole,liberation of bromine and then some hydrogen bromidegas were observed.These findings prompted a...

The work herein described resulted from the investigation on the Wohl-Zieglerreaction of para-methylanisole under different conditions.It was found that solventplayed an important role in the selective bromination.With carbon tetrachloride,side chain bromination was favored in 65% yield,while with glacial acetic acidring hromination was favored in 68% yield.During the reaction of N-bromosuc-cinimide(NBS)on anisole,liberation of bromine and then some hydrogen bromidegas were observed.These findings prompted a further study of the reaction of NBSon several solvents such as carbon tetraehleride,chloroferm,benzene and benzoni-trile.Time of bromine liberation from these solvents has been determined andbenzoyl peroxide in every case served as a promoter.Therefore,the ring bromina-tion of these aryl ethers by means of NBS has been assumed to proceed via a rea-ction mechanism practically identical to the ring bromination by bromine.Fromthis assumption,we have tried to explain:(1)Why either aluminium chlorideor bonzoyl peroxide would serve as promoter in the ring bremination,(2)whym-methylanisole and resercinol dimethylether would be easily ring-brominatedoven in carbon tetrachloride,and(3)why m-methylanisole would not be bromi-hated easily on the side chain.Selective bremination of p-methoxy-acetophenonewas aide studied and 2,4-dimethoxy-5-bromobonzoic acid has been convienentlyand successfully synthesized from 2,4-dimethoxybenzene in three steps.Further studies on the Wohl-Ziegler reaction of p-methoxy-ethylbonzene and2,4-dimethoxyethylbenzene were made.The former would be easily brominated onthe side chain as predicted,while the latter even in carbon tetrachloride brominatedin the ring and would undergo side chain bromination only when an additionalmole of NBS was added.The results indicated that ring bromination was preferreddue to the highly activated benzene nuclei.And the orientation of ring bromina-tion which has been also determined was shown to be what one would expect fromelectrophilic mechanism of bromine ring-bromination.

本文报告对-甲苯甲醚在不同情况下与 N-溴代丁二酰亚胺(NBS)的作用。作者认为溶剂是使溴化反应具选择性的一种重要因素。用四氯化碳则可以得到收率为65%的侧链溴化产物,如用冰醋酸则得到收率为68%的苯环溴化产物。我们在研究苯甲醚与 NBS 作用时,观察到有溴放出,而后又有溴化氢气体出现,由于这些现象,使我们进一步研究 NBS与数种溶剂,例如四氯化碳,氯仿,苯及苯腈的作用。同样发现都在不同的时间内能放出溴,并且过氧化苯甲酰对于在每一种上述溶剂中进行的反应都具催化作用,加速放出溴。我们认为芳香醚与 NBS 所进行的苯环溴化的反应机构基本上是与溴的苯环溴化的反应机构相同。据此我们可以解释,(1)何以三氯化铝与过氧化苯甲酰都能够作为苯环溴化的催化剂,(2)何以间-甲苯甲醚与间-二甲氧基苯即使在四氯化碳中也容易苯环溴化,以及(3)何以间-甲苯甲醚不易进行侧链溴化,此外也研究对-甲氧基苯乙酮的侧链溴化与苯环溴化。我们研究对甲氧基乙苯与2,4-二甲氧基乙苯的溴化反应,发现前者很容易进行侧链溴化,这是符合于游离基丙烯型溴化反应机构的,而后者即使在四氯化碳中首先是苯环溴化,如果再加一克分子 NBS,则第二个溴原子能进入侧链。这...

本文报告对-甲苯甲醚在不同情况下与 N-溴代丁二酰亚胺(NBS)的作用。作者认为溶剂是使溴化反应具选择性的一种重要因素。用四氯化碳则可以得到收率为65%的侧链溴化产物,如用冰醋酸则得到收率为68%的苯环溴化产物。我们在研究苯甲醚与 NBS 作用时,观察到有溴放出,而后又有溴化氢气体出现,由于这些现象,使我们进一步研究 NBS与数种溶剂,例如四氯化碳,氯仿,苯及苯腈的作用。同样发现都在不同的时间内能放出溴,并且过氧化苯甲酰对于在每一种上述溶剂中进行的反应都具催化作用,加速放出溴。我们认为芳香醚与 NBS 所进行的苯环溴化的反应机构基本上是与溴的苯环溴化的反应机构相同。据此我们可以解释,(1)何以三氯化铝与过氧化苯甲酰都能够作为苯环溴化的催化剂,(2)何以间-甲苯甲醚与间-二甲氧基苯即使在四氯化碳中也容易苯环溴化,以及(3)何以间-甲苯甲醚不易进行侧链溴化,此外也研究对-甲氧基苯乙酮的侧链溴化与苯环溴化。我们研究对甲氧基乙苯与2,4-二甲氧基乙苯的溴化反应,发现前者很容易进行侧链溴化,这是符合于游离基丙烯型溴化反应机构的,而后者即使在四氯化碳中首先是苯环溴化,如果再加一克分子 NBS,则第二个溴原子能进入侧链。这结果说明在很活化的苯环上即使有侧链,首先、还是苯环溴化。我们也测定了溴进入苯环的位置,这些事实都符合于我们所设想的,芳香醚的 Wohl-Ziegler 苯环溴化基本上是溴进行苯环溴化的吸电子反应机构。2,4-二甲氧基-5-溴苯甲酸可以从2,4-二甲氧基苯乙酮经侧链氧化再进行苯环溴化合成,方法简便,收率良好。

As an inventor of paper-making, Tsai-lun's name is well known in the World history. But, through the recent years, the findings of archaeological excavation work have revealed that paper made first of silk and then of hemp had existed long before Tsai-lun's time. Thus,a some what confusing state has appeared in our contemporary writings on Tsai-lun's work.On re-ex- aming old documental evidences the present author comes to a conclusion that Tsai-lun still stands conspicuously as an epoch-making figure in the...

As an inventor of paper-making, Tsai-lun's name is well known in the World history. But, through the recent years, the findings of archaeological excavation work have revealed that paper made first of silk and then of hemp had existed long before Tsai-lun's time. Thus,a some what confusing state has appeared in our contemporary writings on Tsai-lun's work.On re-ex- aming old documental evidences the present author comes to a conclusion that Tsai-lun still stands conspicuously as an epoch-making figure in the invention of a new process of paper-making,i.e. paper pulp made of tree barks, linen rags or old fishing . Such a conclusion is brought about more clearly from the dialectic view-point that a historical figure is the product as well as the promoter of social development of his time,

作为造纸术的发明家,蔡伦的姓名是举世皆知的。但是近些年来,由于考古发掘工作所发现 的汉代丝质纸和麻质纸都存在于蔡伦以前,某些科学技术史工作者便作出了颇不一致的论断。本 文的目的在于:一方面对上述论断作一个总结性的评价;另一方面通过对证据的检查,采取文献 记载与考古发现相结合的方法,作出自己的结论。所得的结论是:蔡伦是造纸新术的发明家;他 采用了树皮、破布、旧鱼网作为造纸的新原料,引入了舂捣新技术,因此为造纸术作为一种新型 的独立手工业开辟了广泛迅速发展的道路。作为一个划阶段的历史人物,蔡伦既承继了当时劳动 人民所取得的成就,又创造性地发明了造纸新法。这就是本文所持的辨证观点。

 
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