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1)  negative enhancer
负增强子
2)  negative enhancement
负增强
1.
Superparamagnetic iron oxides (SPIO) are known for their fast T\-2 (T\+*\-2) relaxation properties which result in a strong decrease in signal intensity (negative enhancement) of such reticuloendothelial system as the liver, the spleen, and et al where they accumulate.
结果表明 :该溶胶体系无明显急性毒性 ,且对大鼠肝区有显著的负增
3)  negative intensified image
增强负象
4)  enhancement factor
增强因子
1.
Calculation of the enhancement factor for the individual conductive nanowire in field emission;
单根纳米导线场发射增强因子的计算
2.
Prediction of chemical enhancement factor of complex solutions in membrane gas absorption process
膜气体吸收过程中复合溶液化学增强因子预测
3.
The enhancement factor was derived based on the surface renewal theory.
根据表面更新理论,得到了增强因子的数学表达式。
5)  enhancement factors
增强因子
1.
A simple explicit ex-pression of enhancement factors for mass transfer accompanied by ozonation of pollutants in different zones of ph val-ues was deduced on the basis of the two-film model.
基于双膜模型理论,推导出在不同pH值区间内伴随着臭氧与污染物化学反应过程的增强因子表达式。
2.
Analytical solutions are derived to predict enhancement factors in ozone absorption processes accompanied with ozone decomp.
建立了臭氧吸收数学模型,可较准确地预测水中溶解臭氧浓度;同时基于稳态膜理论,提出了带有一个一级臭氧自分解反应和多个一级或二级臭氧氧化反应臭氧吸收过程的增强因子理论预测模型,与文献值比较,结果合理。
6)  AFP enhancer
AFP增强子
1.
Construction of recombinant retrovirus vector bearing antisense AFP enhancer/TK gene and its hepatocyte-specific expression;
反义AFP增强子/TK基因重组逆转录病毒载体的构建及在肝癌细胞中的专一性表达
2.
To study the effect of AFP enhancer on tumor-specific expression of foreign gene in AFP-producing cancer cells like HepG2 cells.
目的探讨纳米磁流体作为肝癌基因治疗载体的可行性及AFP增强子能否使外来基因在AFP阳性细胞内高表达。
补充资料:负增强子
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性质:对基因转录起负调节作用的增强子,首先是在干扰素-β的研究中发现。在干扰素-β调节元件(IRE)(-77~-36bp)这一区域3′,末端19bp缺失时,在干扰素诱生剂存在的情况下,导致干扰素mRNA大量升高,因而认为这一区域含有负控制序列,而5’末端是正控制序列,起典型的增强子作用。在牛乳头状病毒中进行干扰素-β基因表达试验时,将IRE置于TK启动子与干扰素-β结构基因旁边,发现干扰素-β表达水平显著下降,当用干扰素诱生剂处理这种重组病毒DNA转录的细胞时,上述的负调节效应被解除,干扰素-β又大量表达。

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