Objective To study sequence variation of V3 loop of HIV-1 strains prevalent in China.
目的研究中国艾滋病病毒1型（HIV-1）毒株V3环序列的变异性。
Sequence variation was screened by means of PCR single stranded conformation polymorphism (SSCP) and DNA sequencing.
用PCR -单链构象多态性(SSCP)和DNA序列分析方法确定扩增序列突变情况。
But it's hard to tell in most natural populations whether inheritance is due to DNA sequence variation or epigenetic changes.
但在自然界大多数种群中，很难判断遗传是否源于DNA序列改变或者表观基因变异。
DNA sequence variation in the same species of animals was only observed in human, donkey and mouse, and the number is less than 4 (1.3%), other animals showed no intraspecies variation.
同种动物不同个体间只有人、驴及小白鼠存在变异，最多有4个碱基变异位点(1.3%)，其它动物未发现种内变异。
A SNP is a variation in just one nucleotide of a genetic sequence; think of it as a spelling change affecting just one letter in an uncommonly long word.
一个SNP就是只在一个基因序列的一个核苷酸中发生的变异；就像一个拼写变化只影响一个罕见的长单词中的一个字母。
Science published three papers alongside the sequence, one of which compares specific sections of the genome of 27 globally representative maize varieties to show common patterns of genetic variation.
《科学》杂志在发表这个序列的同时还发表了三篇论文，其中一篇比较了27个全球代表性玉米品种基因组的特定区域，从而展示遗传变异的共同模式。
This variation may introduce discrepancies, and that's why developers have to run the complete build sequence at least once a day to ensure that they haven't broken anything.
各种因素都会导致产生差异，这就是为什么开发人员每天至少必须运行一次完整的构建过程，以确信他们没有破坏什么的原因。
And there was no clear-cut correlations between the variation form and the sequence mode.
而且，这种变化形态与地震序列类型无明显的关系。
Methods Fitting two-level random coefficient model and sequence effect to estimate the treatment effect and its variation between individuals.
方法通过两水平随机系数模型以及顺序效应的拟合，估计处理效应的大小及其在个体间的变异。
Results show that the time sequence of earth resistivity displayed a fractional structure and an obvious reduction of dimensional variation before earthquakes.
结果表明：地电阻率时间序列存在分维结构，并且在地震前有明显的降维变化。
The variation of parameters before and after multiply transformation on original sequence is studied.
研究了该估计方法下对原始序列进行数乘变换后参数的变化特征。
In the process of tunnel fire throttling, the variation time sequence of various physical parameters is the bases for accurately modeling the unsteady fire process and fire fighting decision-making.
巷道火灾节流过程中各物理参数变化时序是正确模拟非稳态火灾过程和救灾决策的基础。
Lake basin sequence is formed through and sedimentation, showing the changes of the sedimentary systems or system tracts in time and space with the lake level variation.
湖盆层序是指在湖盆地内由沉积作用形成的一类层序，表现为随湖水面的升降变化沉积体系或体系域在时空上的变化。
The results indicated that albescent seedlings were caused by the variation of base in the sequence of chloroplast DNA.
说明矮牵牛的白化的确可能是由于叶绿体DNA水平上的碱基变化所引起的。
Objective To investigate the sequence and variation of VP4 and 3D gene of a coxsackievirus B3 Chinese isolate(CVB3-Chi).
目的研究柯萨奇B组3型病毒（CVB3）中国分离株结构蛋白VP4、非结构蛋白3D基因序列及变异性。
Epigenetic is the latest biological science in recent years, which mainly researches gene function reversible and heritable variation without DNA sequence changes.
表观遗传学是近年来新兴起的生物学学科，主要研究在没有DNA序列改变情况下基因功能可逆的、可遗传的变异。
Zero-sequence current criterion, negative sequence current criterion and phase current variation can be used to improve the performance of breaker failure protection for ACF sub-bank.
针对单纯采用相电流判据的不足之处，本文提出增加零序电流、负序电流及电流变化量判据，以有效地避免保护误动或者拒动。
In this paper, based on -, the uniform convergence of the Kth order weak bounded variation functions on the sequence Spaces were investigated. Some equivalent conditions were also obtained.
本文在原有研究结果的基础上，讨论了叙列空间上的弱k级有界变差函数的一致收敛问题，得到了若干有关一致收敛的等价条件。
Temporal change feature is extracted from the visual image sequence using temporal decomposition based on wavelet, which reflects the dynamical content variation at a pixel at any time.
在红外图像序列中，提取了反映局部区域运动相关性的相关特征。
Initially, three core courses were developed: Sequence Similarity Search, Genetic Variation, and Human Genome Resources.
最初，三个核心课程被开发：序列相似性搜索、遗传变异和人类基因组资源。
Results Obtain the estimates of treatment effect, time period effect, sequence effect and individual variation separately.
结果分别获得处理效应、阶段效应、顺序效应以及个体变异的估计。
Results Obtain the estimates of treatment effect, time period effect, sequence effect and individual variation separately.
结果分别获得处理效应、阶段效应、顺序效应以及个体变异的估计。
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