我们发现很多基因突变以后在实验室条件下没有可见的表型。
Many genes have been found that, when mutated, show no visible phenotypic effects under laboratory conditions.
第四，构建了技术突变条件下的最优技术增长率模型。
Fourth, the theoretical model of optimum technological growth rate under discrete change is erected.
与某些变数，变化的灵活性，发生在配体结合，突变，或改变抽样条件可以解释方面的贡献，构象熵。
With certain caveats, changes in flexibility that occur upon ligand binding, mutation, or changes in sample conditions can be interpreted in terms of contributions to conformational entropy.
作者不仅得到弹性拱振动失稳的突变模型，而且给出发生失稳的条件。
The authors not only obtain a catastrophic model of vibrational buckling of elastic arches, but also give the critical condition of losing stability.
分析了含间隙运动副副元素的碰撞分离过程，指出线性弹簧阻尼模型不能满足接触边界条件并产生力突变；
This paper points out the disagreement of boundary conditions that generate force discontinuity in the linear spring damping contact model by analyzing the contact modulation of the clearance joint.
同时，改变发酵液中不同氮源和碳源，对突变株的发酵条件进行了比较研究。
Also the fermentation conditions were studied with different carbon sources and nitrogen sources.
结论：由于地理环境、种族和生活条件的不同，相同的基因突变在不同的人群中所起的作用可能不同。
Conclusion: the same gene mutation may play different roles in different populations because of the differences of geographic environment, ethnic lines and living conditions.
运用正交试验设计理论，对高产L-乳酸突变株NAF-032的最佳摇瓶发酵条件进行了研究，确定了最佳的发酵培养基和发酵条件。
The optimal fermentation medium and conditions of mutant strain NAF-032 with a higher and stable yield of L-lactic acid were studied by orthogonal design theory.
结果显示，有一个突变株不能分化异形胞；三个突变株可以形成异形胞，但在缺氮的条件下仍不能维持生长；
The result showed that one mutant was unable to differentiate heterocyst, three formed heterocysts but still could not maintain normal growth, four growed slowly with heterocyst differentiation.
在盐胁迫条件下，野生型和突变体根的生长都受到不同程度的抑制，但对突变体的抑制较为明显。
Under salt stress condition, the root elongation of WT and AtNOSl mutant were both inhibited, but AtNOSl mutant was inhibited much more seriously.
结果表明：电子-声子耦合达到一定强度时声学极化子有效质量发生突变而使极化子自陷，声学极化子在二维系统中比三维条件下更容易自陷。
The results indicate: the effective mass of an acoustical polaron undergoes a sudden increasing when thee-p coupling constant achieves the critical value and then the self-trapping occurs.
在一定条件下，水动力弥散作用较弱时，可应用突变界面模型来研究滨海含水层的海水入侵。
Under certain conditions, the effect of hydrodynamic dispersion is relatively weak, so that an abrupt interface approximation can be used in studying seawater intrusion in coastal aquifers.
在干旱胁迫条件下，该突变体表现为叶面温度低于野生型，且失水率比野生型高。
This mutant showed cooler leaf temperature and faster water loss rate than did the wild type under drought stress.
本文给出了具有突变率的广义生-灭过程的常返性、正常返性、指数遍历性及强遍历性的充分必要条件。
The necessary and sufficient conditions for recurrence, positive recurrence, exponential ergodicity and strong ergodicity of the process are presented.
在相同种植条件下，低纤维基因突变体选育的嫩稻表现出较强的营养体生长优势，收获期叶、鞘、茎生物产量分别较亲本提高27.77%、30.19%和37.96%。
Compared with parental rice, LF rice showed an advantage in its vegetative growth and the yields of leaf, sheath and stem increased by 27.77%, 30.19% and 37.96% respectively.
对纤溶酶产生菌的突变株进行发酵条件优化；
The optimal fermentation conditions for producing fibrinolytic enzyme were determined;
对突变体与野生型拟南芥在胁迫条件下的表型进行分析表明。 突变体nadk2在正常情况下，生长矮小，叶色黄绿。
The NADK2 knock out mutant (nadk2) showed obvious growth inhibition and smaller rosette leaves with a pale yellow color.
岩石的失稳破坏就是岩石中能量突然释放的结果，这种释放是能量耗散在一定条件下的突变。
Rock failure is caused by the abrupt energy release, which is the catastrophe of energy dissipation under a certain condition.
本文从突变理论入手，建立了顺层边坡的尖角型突变模型，并推导出了边坡系统的总势能表达式以及这类边坡失稳的临界条件。
A cusp catastrophic model is founded on the stability of an inclined bedding slope from catastrophic theory, and a formula of the total potential energy and a criterion condition are derived.
本文还对突变株60d7z53发酵产酶培养基和培养条件进行了优化。
The optimal culture medium and conditions of cellulase production on the mutant 60d7z53 were carried out.
对高活性突变株m 14的细胞转化和发酵转化条件进行优化。
The conditions of fermentable and enzymatic conversion of M14 were optimized.
采用新型常压室温等离子体射流诱变产油酵母，结合快速突变产油酵母操作条件及基于96孔板的高通量筛选手段，获得了一系列增殖速度和产油量发生变化的突变株。
To obtain oleaginous yeast mutants with improved lipid production and growth rates, an atmospheric and room temperature plasma(ARTP) jet was used with a 96-well plate for high throughput screening.
符合条件的患者乙肝表面抗原阳性的代偿性肝脏疾病的男性和女性谁是至少6个月以上的，给予拉米夫定和HBV聚合酶基因突变。
Eligible patients were hepatitis B surface antigen-positive men and women with compensated liver disease who were given lamivudine at least more than 6 months and had HBV polymerase gene mutation.
符合条件的患者乙肝表面抗原阳性的代偿性肝脏疾病的男性和女性谁是至少6个月以上的，给予拉米夫定和HBV聚合酶基因突变。
Eligible patients were hepatitis B surface antigen-positive men and women with compensated liver disease who were given lamivudine at least more than 6 months and had HBV polymerase gene mutation.
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