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     5. Human MSCs were treated with Dex at indicated concentration.
     5
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     (5) .
     (5).
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     The cri-du-chat syndrome is one of the 5p deletion syndromes.
     猫叫综合征只是一种5p缺失综合征。
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     The deletions ranged in size from 4.5~5.5 kb.
     缺失片断在4.5~5.5 kb之间。
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  5 ' deletion
5' deletion from -1214/+115 to -85/+115 bp upstream of the transcriptional start site increased, further stepwise deletions to 46/+115 gradually decreased promotor activity.
      
In addition, this system identifies a distinct clinical subgroup characterized by an isolated chromosome 5 deletion.
      
One of the patients with a COL4A5 deletion and the patient with the splice site mutation developed anti-GBM antibodies after renal transplantation.
      
A 5' deletion analysis of the nap promoter fused to lacZ revealed that full redox control of expression was retained when the DNA sequence up to position -49?bp, relative to the operon-distal P1 transcription start site, was removed.
      
Polymorphisms were identified by cosmids carrying rrn18, nad5-exon2, rpl5, and the previously described JLV5 deletion.
      
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华北地台的石炭系主要为海相、陆相混合沉积的含煤地层. 地台本部沉积区因受东西向构造线的控制,地层厚度及岩相呈东西向有规律的分布,中石炭世的沉降中心在辽东、徐州一带,晚石炭世沉降中心已迁移至郑州、淮南一带.地层厚度及所含灰岩层数,由各沉降中心向外有逐渐减薄以至缺失的现象. 地台西部贺兰山棹子山沉积区,因受南北向构造线的控制,厚度及岩相呈南北向分布,中、晚石炭世沉降中心无明显迁移,往往由巨厚沉积向外很快变薄. 根据各沉积区相的组合特征,将中晚石炭世的沉积划分了五个相列:冲积相列,湖泊相列、三角州相列、泻湖相列和浅海相列.各相列均反映了与古地理景观的一致性. 地台本部沉积区中石炭世的古地理环境是:由南侧的滨海准平原环境,向北过渡为泻湖海湾环境,向东过渡为浅海环境.晚石炭世由北部内蒙地轴边缘的山前冲积平原环境,逐渐向南过渡为滨海冲积平原环境,泻湖海湾环境,向东南过渡为浅海环境. 地台西缘沉积区中石炭世为泻湖海湾环境,晚石炭世为滨海冲积平原环境. 根据地层厚度、岩性、岩相特征、灰岩层数及重矿物分析,可以确定中石炭世地台区地形比较平缓,海侵主要来自东北及西南方向.晚石炭世地形分异趋于明显,北部内蒙地轴强烈隆起...

华北地台的石炭系主要为海相、陆相混合沉积的含煤地层. 地台本部沉积区因受东西向构造线的控制,地层厚度及岩相呈东西向有规律的分布,中石炭世的沉降中心在辽东、徐州一带,晚石炭世沉降中心已迁移至郑州、淮南一带.地层厚度及所含灰岩层数,由各沉降中心向外有逐渐减薄以至缺失的现象. 地台西部贺兰山棹子山沉积区,因受南北向构造线的控制,厚度及岩相呈南北向分布,中、晚石炭世沉降中心无明显迁移,往往由巨厚沉积向外很快变薄. 根据各沉积区相的组合特征,将中晚石炭世的沉积划分了五个相列:冲积相列,湖泊相列、三角州相列、泻湖相列和浅海相列.各相列均反映了与古地理景观的一致性. 地台本部沉积区中石炭世的古地理环境是:由南侧的滨海准平原环境,向北过渡为泻湖海湾环境,向东过渡为浅海环境.晚石炭世由北部内蒙地轴边缘的山前冲积平原环境,逐渐向南过渡为滨海冲积平原环境,泻湖海湾环境,向东南过渡为浅海环境. 地台西缘沉积区中石炭世为泻湖海湾环境,晚石炭世为滨海冲积平原环境. 根据地层厚度、岩性、岩相特征、灰岩层数及重矿物分析,可以确定中石炭世地台区地形比较平缓,海侵主要来自东北及西南方向.晚石炭世地形分异趋于明显,北部内蒙地轴强烈隆起,成为主要的岩屑供给区,南部及东部地轴、地盾也相应上升,海水主要来自东南及西南方向.

In the light of the recent geological informations and field observations on the Sinian stratigraphical subdivisions and structural framework in South China the present authors are led to the conclusion that the lower boundary of the Sinian sequence should be shifted downwards. The newly established scheme of the Sinian stratigraphical subdivisions of southern China from base upward consists of Szepao series, Panhsi series, Puling series and Chiatung series. Based on the study of the type section of the Chihsien...

In the light of the recent geological informations and field observations on the Sinian stratigraphical subdivisions and structural framework in South China the present authors are led to the conclusion that the lower boundary of the Sinian sequence should be shifted downwards. The newly established scheme of the Sinian stratigraphical subdivisions of southern China from base upward consists of Szepao series, Panhsi series, Puling series and Chiatung series. Based on the study of the type section of the Chihsien area in North China, the Szepao series, Panhsi series and Puling series of South China can be correlated respectively with the Changcheng series, Chihsien series and Chingpeikou series of North China, while a stratigraphical hiatus usually exists betweer the Sinian and the Cambrian which marks the Chihsienian movement in the Chihsien area and thus the Chiatung series is not represented in North China. The large amounts of the Sinian andesitic volcanic rocks and the extensively distributed and developed Sinian flysch formation suggest the existence of an ancient volcanic arc-trench system occurring within the area of the Kiangnan geanticline and its southeastern side during the Sinian period.

华南震旦系下限应下移,包括上下板溪群和与其相当的地层。自下而上可分为“四堡统”、“板溪统”、“铺岭统”和“峡东统”四个统。以蓟县震旦系剖面为我国震旦系标准,南北方震旦系可以对比,南方的下面三个统分别与蓟县剖面的长城统、蓟县统、青白口统相当,“峡东统”在蓟县地区缺失。震旦纪在江南地背斜范围内形成过古岛弧,并有古海沟的发育。

Treating the cultured anthers in early stage with mutagens ethyl methane sulphonate(EMS), 1-methyl-3-nitro-1-nitrosoguanidine (MNNG) and ethylene imide (EI), we observed an enhance in the formation of albino pollen plantlets with an decrease in the formation ot green plantlets, and thus an obvious increase of the percentage of albinos in total plantlets, for instance, 34.9% in treatment of 2.5 ml/1 for 8 h. (26℃) on cultured anthers of variety 8126, compared with 6.7% of control. But even in this case, mutations...

Treating the cultured anthers in early stage with mutagens ethyl methane sulphonate(EMS), 1-methyl-3-nitro-1-nitrosoguanidine (MNNG) and ethylene imide (EI), we observed an enhance in the formation of albino pollen plantlets with an decrease in the formation ot green plantlets, and thus an obvious increase of the percentage of albinos in total plantlets, for instance, 34.9% in treatment of 2.5 ml/1 for 8 h. (26℃) on cultured anthers of variety 8126, compared with 6.7% of control. But even in this case, mutations in other characters was observed only in very few pollen plants. Albino seedlings also occurred in progenes of a few pollen plants, the frequency of its occurence in H2 strains was 100 times more than that in H3. The experimental results are available to the claim that the cause of albinos formation might be the losses of some genes. The formation of more albino pollen plantlets caused by mutagens would give much difficulty to the attempt of producing mutants through inductive mutation on cultured pollens of rice.

用化学诱变剂甲基磺酸乙酯(EMS)、乙烯亚胺(EI)和1—甲基—3—硝基—1—亚硝基胍(MNNG)处理培养早期的水稻花药,观察到花粉白苗的形成增加而绿苗的形成减少。因此花粉总苗数中白苗所占的百分数显著增高,例如用 EMS 2.5ml/1在26℃处理品种8126的培养花药,花粉苗中白苗为34.9%,而对照为6.7%。但即使在这种情况下,所培养出的花粉植株中只有很少数发生性状突变。白苗也在少数绿色花粉植株后代中出现,其频率第二代比第三代高100倍以上。试验结果有利于认为水稻白化苗的成因可能是培养花粉中某些基因的缺失。化学诱变剂处理导致较多花粉发育成白苗,这对于试图利用水稻培养花粉进行诱变以便获得某种突变体是一大障碍。

 
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