mutation of cells 中文意思是什麼
mutation of cells
解釋
細胞的突變-
The bell - shaped time course of the information entropy indicates that a forward mutation of " - resistant " hosts takes place, since no loss of cellular viability occurs for the second growth phase of reinduced ( i. e. recovered ) cells
從誘導過程之鐘形訊息亂度之時間趨勢表示正向反應變異為-阻抗能力之宿主菌確實已發生，因為再誘導菌相細胞之第二生長期並未發生因感染而失去細胞存活之現象。 -
Our previous work identified delayed mutation occurred at target supf trna gene in plasmid transfected into cells pretreated with low concentration of alkylating agent n - methyl - n ' - nitro - n - nitrosoguanidine ( mnng )
在收回的質粒上我們檢測到了延遲發生的、高於對照5倍以上的突變。由於w在細胞中的半壽期僅為1 -
Genetic effects refer to biological changes on the descendants of the exposed individuals due to mutation of their genetic cells
遺傳效應是指因生殖細胞受照后產生突變而顯現在受照者後代身上的生物效應。 -
Hprt gene locus mutation of hpv - 18 immortalized human bronchial epithelial cells induced by cigarette smoke condense and its major harmful component
卷煙煙氣及其主要有害成分誘發細胞基因突變的研究 -
Hla - g1, which is a newly defined non - classical hla class i molecule, plays an important role in mediating immunotolerance and protecting embryo and even some kinds of tumors from nk cells attacking. the full - length coding sequences containing cdna of hla - g1 were cloned from placenta, monocytes and liver cancer tissue of chinese donors. sequence analysis reveals that it is a highly conserved human gene with only two amino acid mutation sites compared to foreign nationality. its truncated form was overexpressed in
從中國人外周血單個核細胞胎盤組織和肝癌組織等樣品中克隆了包含完整hla - g1讀框的cdna與國外同行獲得的該基因及其蛋白質序列比較分析表明，該基因雖然有著細微的種族特異性，但高度保守並獲得了它的截斷型重組蛋白，根據蛋白一級結構和同源比較方法，模建了它及其與特異性受體kir2dl4形成復合體的空間結構模擬，預測了它們之間相互作用的特徵。 -
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。 -
Mutation can also occur in cells other than germ cells - somatic mutation ? but this is likely to be apparent only when the genetically altered cell proliferates abnormally to form a large family or clone of similar cells, e. g. when a tumour forms
突變也可發生於生殖細胞以外的細胞（體細胞突變） ，但這很可能僅表現于遺傳性改變的細胞異常增生而形成一大系或克隆的相似的細胞時，例如當一個腫瘤形成時。 -
Better segmentation effect can be attained by coding gray levels of pixels as eigenvector, taking advantage of histogram entropy principles function as fitness function, adopting ranking selection operation, making use of arithmetic crossover and mutation at a certain probability, combining with clustering analysis to initialize clustering center of the population to segment cells image with genetic algorithm
以像素的灰度值為特徵向量進行編碼，利用直方圖熵法準則函數作為適應度函數，採用基於排名的選擇操作，以一定的概率進行算術交叉和變異，並結合聚類分析設定種群的聚類中心對細胞圖像進行遺傳聚類分割。 -
3 ) the results of studying on the chromosomal mutation and mitosis of the wheat irradiated by uv - b indicated that the rate of mitosis was inhabited by uv - b radiation ( 10. 08 kj ? m " 2 ? d " 1 ) in wheat cells, and some types of chromosome aberration were induced
（ 3 ）對染色體及細胞分裂的研究結果表明，增強uv - b輻射能抑制小麥細胞的有絲分裂率，產生落後染色體、染色體橋、游離染色體、核變形等畸變。 -
Effects of low doses 147pm internal irradiation against hereditary mutation in mouse cells induced by high dose of radiation
內照射誘發小鼠細胞遺傳突變抗性的研究 -
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。 -
Biological damage to cells, tissues and whole organisms takes place over hours to several years. this can include the immediate death of cells, reduction of capacity for cell division, mutation or cancerous change
電離輻射對細胞組織及整個生物的破壞則可歷時數小時至數年，導致細胞即時死亡減低分裂能力突變或生癌。 -
We are finding evidence that the mutation underlying huntington ' s is double - barreled : it not only encodes an abnormal protein that appears to be toxic to nerve cells, but the faulty protein can no longer prompt production of a key growth factor, starving a particular part of the brain
我們有證據顯示，杭丁頓氏癥突變基因的作用乃是雙管齊下，它不只製造出對神經細胞似乎有毒的不正常蛋白，同時該缺陷蛋白也無法促使某個重要生長因子的生成，造成腦中某個特定部位少了營養物質的滋潤。 -
It may arise naturally due to mutation in a cell of a developing embryo, producing a line of cells with the mutant gene, and hence different characteristics compared to surrounding cells
嵌合體可以由發育著的胚胎細胞變異而自然形成，這樣就產生了具有不同性狀的變異基因的細胞系。 -
The cm model simulates cells reactions on arbitrary surface. by controlling the division, mutation and repulsion of cells, a regulated spatial arrangement of cells is formed. this arrangement of cells shows appealing result, which is comparable with those naturalpatterns observed from animal skin
Cm模型是為了在任意表面上模擬細胞反應過程而提出的一種模型，它通過控制細胞的分裂突變和排斥等行為，來生成細胞的空間分佈，以模擬各種斑紋效果。 -
In this research, the expression of dna polymerase p was examined in mnng treated cells, where untargeted mutation had been proved arisen
Lp的表達：我們用western印跡方法檢測了經mnng處理后細胞中的p 。 -
It has also been demonstrated that sos response dependent accumulation of mutation during replication of dna that has not been attacked by exogenous dna damaging factors can be seen in challenged cells, termed as sos untargeted mutation
而在出現sos反應的細胞中還觀察到了在復制過程中的產生的、發生在沒有外源損傷dna上的突變事件，被稱為sos非定標性突變。 -
However, dna damage has been ruled out as the prerequisite for alkylating agents - induced mutagenesis. for example, somatic hypermutation, which occurred around the variable region in the immunoglobin gene of b cells, is driven by antigen activation not by dna damage and is considered a kind of active mutation
但是dna損傷並不是引起突變的必要條件，一個典型的例子就是發生在b淋巴細胞的免疫球蛋白（ ig ）可變區基因上的「體細胞超突變（ somatichyermutation ） 」 ，是由表面抗原受體而不是dna損傷驅動的主動突變。
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