突变的

The surface albedo and radiation intensity are obviously reduced in June at monsoon onset with rain...

高原中部和东部的净辐射在6月中旬有明显的突变现象，西部突变期出现在7月上旬。

In this paper,the progress,especially combining gene engineering of mutational biosynthesis is reviewed.

本文综述了突变生物合成技术在微生物药物领域的应用，特别是结合基因技术进行突变生物合成研究的新进展。

Through cytological observation ,this semi-sterile line gets together shorter filament, and longer stigma, longer stylus and longer carpophore.

首次发现大豆突变体HNL002具有双花柱、柱头外露、花药退化、花药距柱头的距离远和不育五种突变聚集在一起的特征。

It has been discovered that there exists remarkable abrupt change of Circulation in climatologic characteristics between second pentad and third pentad of October,and low tropophere temperature has three abrupt changes (first pentad of September、third -fourth pentad of November and sixth pentad of January).

讨论了东亚冬季风的演变过程，发现在气候学特征上环流存在着明显的10月突变(10月第3候)，对流低层温度存在三次突变(9月初，11月中旬和1月末)。

Polymorphism was detected for exon 3 of BMP4 gene in four sheep breeds. For exon 3, three genotypes were detected in four sheep breeds. In Small Tail Han, Chinese Merino, Corriedale and South African Mutton Merino sheep, frequency of genotype AA was 0.017, 0.216, 0.115, 0.429, frequency of genotype AB was 0.102, 0.317, 0.269, 0.500, frequency of genotype BB was 0.881, 0.467, 0.616, 0.071, respectively. Sequencing revealed one singlenucleotide mutation C→A at 305 bp of exon 3 of BMP4 gene in genotype BB in comparison to genotype AA, and this mutation resulted in an amino acid change of alanine→aspartic acid.

对于外显子3的引物，在4个绵羊品种中都检测到3种基因型；统计结果表明：小尾寒羊、中国美利奴绵羊、考力代绵羊、南非肉用美利奴绵羊AA基因型频率分别为0.017、0.216、0.115、0.429，AB基因型频率分别为0.102、0.317、0.269、0.500，BB基因型频率分别为0.881、0.467、0.616、0.071；测序结果表明：BB型和AA型相比在BMP4基因外显子3第305位碱基处发生C→A的突变，该突变导致氨基酸由丙氨酸改变为天冬氨酸；BB型小尾寒羊平均产羔数分别比AB型和AA型多0.61只（P.05）和1.01只（P.05）。

Spontaneous mutations Mutations that occur as the result of natural processes in the cell, such as deamination caused by reaction of bases with water.

自发突变细胞中因自然过程而产生的突变，例如碱基与水反应所引起的脱氨基。

So it is of great importance to detect the signal discontinuity.

在故障诊断中，故障通常表现为输出信号发生突变，因而对突变点的检测有非常重要的意义。

3 Was a suitable concentration scope. 4.Mutagenic effect of single-hybrid treated with EMS-mineral oilWhen the pollens of single-cross Xinong No.2 were treated with 0.67 ×10-3 ,white grain mutation and light yellow grain mutation were found in M2 ,and sweet grain mutation , white ear and light yellow ear with steady genetic character were got in Ma.

得到了白粒、浅黄粒突变体；M3出现了甜粒突变体，并得到遗传性状稳定的白色、浅黄色特用玉米果穗。

The introduced kan gene in EBV-BAC genome was eliminated specifically by the recombinase FLP when transformed by plasmid pCP20, leaving an FRT scar of 69 bp.

这种经改进并程序化的方法，也适应于引入其它突变或在其它BAC-疱疹病毒基因组中引入突变。

A new mutation that was not inherited from either parent is called a de novo mutation.

一种不是由父母遗传的新突变称为从头突变。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。