mutation frequency 中文意思是什麼
mutation frequency
解釋
（突變頻率）：在種群中某個突變被發現的頻率。-
The householder transformation have some advantages of anti ill function, stability, fewer calculation amount and good trace ability. in addition, in practice application high frequency interferer and data mutation are considerd, so the data acquired derectly are pre - disposed
辨識演算法上，採用了基於householder變換的自適應最小二乘法，其具有抗方程病態性好，穩定性好，計算量小，跟蹤性好等優點。 -
In our laboratory, a unique mutation detection system using a shuttle vector plasmid has been established to demonstrate that a low concentration of mnng ( 0. 2 m ) can induce nontargeted mutation in mammalian cells : the mammalian cells were exposed to 0. 2m mnng for 2. 5h, then a shuttle plasmid pz189 carrying supf trna gene was transfected into cells after 24h culture. we found a 5 - fold higher mutation frequency of the plasmid replicated in pretreated cells than the spontaneous mutation frequency of the plasmid replicated in control cells. this kind of mutation did not occur immediately after mnng exposure
我們實驗室曾用一特殊的突變檢測系統，直接證明dna損傷劑可在哺乳動物細胞誘發非定標性突變：首先用低濃度（ 0 . 2 m ）的短壽烷化劑mnng （半壽期為1 . 1hr ）處理細胞2 . 5h后，繼續培養24h ，將重組有用作突變檢測的靶基因supftrna基因的穿梭質粒pz189轉入細胞復制，發現在未受致癌物直接攻擊的穿梭質粒中有較自發突變率高5倍以上的靶基因突變。 -
The method not only can coordinate evolutionary process inside each population by using an adaptive regulation of crossover and mutation operators, but also can advance the formation of - best design by using adaptive adjustment of the competition frequency between populations
該方法不僅運用交叉運算元和變異運算元的自適應調節技術協調種內進化過程，而且通過種間競爭頻率的自適應調節促進最優個體的生成。 -
Time - course analysis showed that the frequency of mnng induced nontargeted mutation increased gradually, reached the peak at 12 h after mnng treatment, and then declined
且突變譜明顯不同於由mnng直接攻擊引起的定標性突變，有其突變好發部位的序列特異性。 -
Effect of combined treatment of caffeine benzamide and 137cs - ray on mutation frequency in soybean
射線復合處理提高大豆突變頻率的研究 -
An expression vector with fragment 9 in antisense orientation was constructed to block the expression of the relevant gene ( fragment 9 related gene, fnr gene ) in vero cells. interestingly, we found that the nontargeted mutation frequency induced by mnng was increased significantly, implicating that the product of the blocked gene may be involved in the inhibition of nontargeted mutation
利用反義核酸技術構建含反向插入9號片段的真核細胞表達重組體並轉染細胞，以獲得反義rna阻斷vero細胞中相應基因的表達，發現mn 』 ng誘發的非定標性突變頻率顯著增高，提示被阻斷的相關基因的表達產物可能參與抑制非定標性突變的發生。 -
The products were used in rflp analysis. we found the g849a nonsense mutation that was responsible for the se enzyme inactivation in shandong han chinese and mongolian of inner mongolia individuals was in the same frequency, 0. 55 %
結果在兩個人群中均發現了一個攜帶g849a點突變的個體，該點突變產生的無功能等位基因se ~ （ 849 ）在兩個人群中的頻率均是0 . 55 。
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