选择性

The purity of SAM product was higher than 95％, and the overall recovery of SAM sulfate and SAM double salt of sulfate and p-tosylate were 60％ and 50％, respectively.

通过筛选，获得了对SAM有较好选择性离子交换能力、较易洗脱和再生的争光D113弱酸型阳离子树脂，研究了温度、pH等对SAM离子交换的影响，根据SAM在弱酸阳离子树脂D113上的等温交换平衡行为表现出较强的可逆性，考虑到交换基的弱电解质性质以及结合Donan膜平衡理论，建立了考虑pH影响的可逆离子交换平衡模型，该模型可以较好地描述SAM平衡浓度、pH对离子交换平衡的影响；通过对动态离子交换过程的研究，得到了SAM在D113树脂内的有效扩散系数的数量级为1.0E-9cm〓/s～1.0E-8cm〓/s。

Then SAM precipitation was carried out by picric acid and SAM precipitated is higher than 90％. After butanone extraction, acetone precipitation and SAM sulfate or SAM double salt of sulfate and p-tosylate formation, the stable SAM salt was obtained.

结果表明，苦味酸是一种选择性较好的沉淀剂，沉淀步骤得率在90％以上，制备SAM的硫酸盐的总得率在60％以上，而硫酸对甲苯磺酸双盐的得率在50％以上，产物的纯度达到了95％以上，已经达到了国外同类产品的质量指标。

Our results showed that 1, 8-Naphthyl imide could improve the properties of natural oligonucleotide in resisting nuclease and binding the targeted sequence by covalently linkage at the end of oligonucleotide. Moreover, our results also showed that the antigene oligonucleotide could specifically cleave the targeted double DNA sequence by modification of naphthyl imide at the 3'end of oligonucleotide.

体外结果表明萘二酰亚胺对寡核苷酸的共价修饰可以提高天然寡核苷酸抗核酸酶降解能力，提高寡核苷酸与靶序列结合的稳定性以及使寡核苷酸具有选择性结合和切断靶DNA的功能。

The effects of reaction parameters such as temperature, pressure, and hydrogen to hydrocarbon ratio (H2/HC) on the hydroconversion of methylcyclopentane over Pt/HZSM-5 have been investigated in a fixedbed downflow reactor.

在连续流固定床反应装置上，考察了反应温度、压力及氢烃摩尔比等条件对甲基环戊烷临氢转化反应活性及扩环反应选择性的影响；结合反应评价结果和热力学分析，探讨了Pt/HZSM-5催化作用下MCP的扩环反应规律。

It is still the questions to be solved in the analysis of druggery to optimize the analytical conditions, improve the selectivity, reduce the detection limit and simplify the procedue.

优化反应条件，简化操作步骤，提高方法的选择性和降低测定的检出限，仍是光度分析需要解决的问题之一。

Compared with the traditional discrete wavelet transform, the dual tree complex wavelet transform has the properties of approximate shift invariance and more directionality. These properties are good for tracing, locating and preserving image features.

与常用的离散小波变换相比，该方法具有逼近的平移不变性和更多的方向选择性，有利于特征的跟踪、定位和保留。

In this paper, a speckle reduction method for Synthetic Aperture Radar images based on Dual Tree Complex Wavelet Transform is proposed, for the DTCWT has approximate shift-invariant and good directional selectivity.

利用双树复数小波变换(Dud Tree Complex Wavelet Transform， DTCWT)的近似平移不变性和多方向选择性，提出了一种基于DTCWT变换的SAR图像嗓声抑制方法。

Results Ten patients had left dominance, and 2 right dominance. The fMRI results were concordant with Wada test results in the 4 patients who accepted the Wada test. Seven patients underwent anterior temporal lobectomy, and 5 underwent selective amygdalo-hippocampectomy. There was no post-operative dysphasia.

结果 10例为左侧语言优势；2例右侧语言优势；4例接受阿米妥实验的病例的优势半球与功能性MRI结果一致；7例接受前颞叶切除，5例接受选择性海马杏仁核切除；术后患者未出现语言功能障碍。

This is minimal change disease which is characterized by effacement of the epithelial cell foot processes and loss of the normal charge barrier such that albumin selectively leaks out and proteinuria ensues.

这是轻微病变性肾小球肾炎，它的特征是上皮细胞的足突消失，导致失去了正常的电荷屏障，使白蛋白选择性地漏出，并且随后发生了蛋白尿。

Electively targeting of signaling pathways using protein kinase inhibitors would have a potential advantage over receptor blockers.

这种用来选择性地阻断信号转导途径的蛋白激酶抑制剂可能是一种潜在的有利的受体阻断剂。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷