To this end, the design of the dozens of pairs of amplification primers for different proto-oncogene J subsets of avian leukemia virus chimeric molecules to the gag gene and the fps gene chimera molecule, and further amplified by the helper virus and defective virus wholly genome.

Occult hepatitis B virus infected donors exist in our country. And some features of them have been studied in our experiment.

我国献血者中有一定比例的隐性乙型肝炎感染者存在，并初步掌握了其血清学及分子生物学特点。

Occult hepatitis B virus infection in hemat-opoietic stem cell donors in a hepatitis B virus endemic area

乙型肝炎病毒流行区中造血干细胞供体的隐匿性乙型肝炎病毒的感染

Determining the Infection Rate Of Occult Hepatitis B Virus in Various Kinds of People by Nested-Polymerase Chain Reaction

巢式聚合酶链反应检测不同人群隐匿性乙型肝炎病毒感染

Clone of S gene in occult hepatitis B virus infection and construction of prokaryotic expression vector

隐匿性乙型肝炎病毒S基因的克隆及其表达载体的构建

Prevalence of occult hepatitis B virus infection in general adults

普通成年人群隐匿性乙型肝炎病毒感染情况分析

Comparative analysis between occult hepatitis C virus infection and chronic hepatitis C

隐匿性丙型肝炎病毒感染与慢性丙型肝炎的比较分析

Occult Hepatitis B Virus Infection: Analysis of HBV Gene Mutation

隐匿性乙型肝炎病毒感染：HBV基因变异分析

As a rule the swine infested with the lungworms carrying the "masked virus" did not develop swine influenza immediately upon infestation with the lungworm.

通常，受到携带了“隐蔽病毒”的肺丝虫侵袭的猪，并不因肺丝虫的侵袭立即发生流感。

In half of the trials, the subjects'awareness of the angry faces was prevented by backward masking with a neutral face.

试验的前半部份，受试者对于愤怒脸部的意识，被一张无情绪表达的脸所产生地相反掩蔽作用所阻碍。

Ten undergraduate students with normal eyesight ( including corrected vision) were tested in two sets of visual pattern backward masking experiments.

对10名大学本科学生视力正常者（含矫正视力）进行了两组视觉模式后向掩蔽实验。

Object Substitution Masking: Progress in Visual Backward Masking

客体替代掩蔽：视觉后向掩蔽研究的新进展

AIM: Both backward masking and masked priming involve visual perception, sensory memory, attention and consciousness processes. And they have become typical paradigms used in many psychological researches.

视觉反向掩蔽现象和掩蔽启动现象涉及视知觉、瞬时记忆、注意与意识过程，并成为典型范式应用于心理学研究。

The research on simultaneous masking curve and pattern has been studied widely in abroad with a series of research results; while the research on this topic in our country has not been studied deeply.

国际上对同时掩蔽曲线与模式的研究非常重视，并得到了一系列的研究成果。但是国内对这方面的研究还不够深入。

Simultaneous masking which is an important research content of psychoacoustic, have a wide range of applications in audio coding, speech enhancement and so on.

同时掩蔽是心理声学的重要研究内容，在音频压缩编码、语音增强等方面有着广泛的应用。

A psychoacoustic experiment shows that human hearing masking effects is not only temporal masking, is but also including simultaneous masking.

心理声学的研究表明，人对声音的掩蔽现象不仅有瞬时掩蔽，而且还有同时性掩蔽。

Another part of this dissertation studies the EBSD measure with simultaneous masking.

论文的第二部分研究了利用同时掩蔽的EBSD测度。

After adding some masking agents, the reagent is applied to determinate Pb(ⅱ) in water standard samples.

在一定掩蔽剂的作用下，试剂可用于测定环境水质标准样品中铅的测定。

A method for the determination of arsenic, antimony and bismuth in high purity zinc by hydride generation-atomic fluorescence spectrometry ( HG-AFS) with thiourea-ascorbic acid-hydroxylamine hydrochloride as masking and reducing reagent has been proposed.

提出了以硫脲-抗坏血酸-盐酸羟胺作为混合还原掩蔽剂，氢化物发生-原子荧光光谱法（HG-AFS）测定高纯锌中砷、锑、铋的方法。

Mercury in crude gold has been determined directly without separation by AAS with potassium thiocyanate as the masking reagent for gold and SnCl_2as reductant to reduce mercury into the vapour atomic mercury in NaOH medium.

以硫氰酸甲作金的掩蔽剂，用SnCl2在强碱介质中还原化合汞为原子汞进行汞的冷原子吸收测定。

The selectivity of the method may be increased by addition of thiocarbamide as masking reagent and pre-separation of the interferential elements using NH_3-NH_4Cl. This method is simple, rapid and accurate.

加入硫脲作掩蔽剂和用NH3-NH4CI预分离干扰元素可提高方法的选择性。