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rna metabolism
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  rna代谢
     Changes of RNA Metabolism in Ripening Strawberry Fruits
     草莓果实成熟期间RNA代谢的变化
短句来源
     CHANCES OF RNA METABOLISM DURING APPLE FRUIT RIPENING
     苹果成熟期间RNA代谢的变化
短句来源
     Effects of Ethylene on the RNA Metabolism and Protein Synthesis Activity in Postharvest Strawberry Fruit
     乙烯诱导下草莓果实采后RNA代谢与蛋白质合成活性的变化
短句来源
     Studies on the Physiological Effects and Applications of 1,4-Disubstitued Acyl Thiosemicarbazide Derivatives (DATCDs) in Plants Ⅵ. Regulations of RNA Metabolism by DATCD--A in Excised Cucumber Cotyledons
     1,4—二取代酰氨基硫脲类化合物(DATCD_s)的植物生理效应与应用研究——Ⅵ.DATCD—A对离体黄瓜子叶中RNA代谢的调控
短句来源
     Objective To investigate the effect of γ-radiation on DNA and RNA metabolism in cells of small cell lung cancer (SCLC) strain (CNI-H446) and their three-dimensional structure.
     目的 探讨电离辐射对小细胞肺癌细胞株 (CNI H4 4 6 )DNA RNA代谢比值的影响及观察细胞三维结构的改变。
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  rna的代谢
     The results showed that PGS could stimulate synthesis of RNA metabolism of BMSC in vitro,and it could enhance the activity of IL-6 IL-3 in experimental supernants of BMSC compared with normal control.
     结果表明.TGS在体外对小鼠骨髓基质细胞RNA的代谢有明显的促进效应.并且发现骨髓基质细胞实验上清中IL-3、IL-6因子的活性显著高于正常对照组。
短句来源
     The exosome acts important role in several pathways of RNA metabolism.
     外切体在多种RNA的代谢中起重要作用 .
短句来源
     It has also been demonstrated to associate with various signal transduction molecules, thereby raising the possibility of its role in cell cycle control as a modulator of the signal transduction and activation of RNA metabolism.
     尽管确切机制尚不清楚,一些人还是认为Sam68可通过调控RNA的代谢参与细胞周期调控.
短句来源
  “rna metabolism”译为未确定词的双语例句
     Experi- ments showed that the synthesis of DNA and protein were partially blocked after exposing to 261-B_2-3 and the inhibition rate showed a relationship to the concentration of 261-B_2-3, but 261-B_2-3 gave no evidence of interference of RNA metabolism.
     研究表明261-B_2-3对DNA和蛋白质的合成有明显的抑制,其作用强度呈明显的浓度相关性。 但是它对RNA的合成无明显影响。
短句来源
     DEAD-box RNA helicase plays an important role in RNA metabolism, it is required for RNA synthesize to RNA degrade.
     DEAD-box RNA解旋酶在RNA的新陈代谢过程中起着重要作用,从RNA的合成到RNA的降解都需要它的存在,同时它对植物的生长发育和抗逆反应中起调控作用。
短句来源
     DEAD-box RNA helicases are involved in various aspects of RNA metabolism, including RNA transcription, premRNA splicing, ribosome biogenesis, nucleocytoplasmic transport, translation and RNA decay.
     DEAD-box RNA解旋酶参与RNA转录、前体mRNA剪切、核糖体发生、核质运输、蛋白质翻译、RNA降解等重要的生命活动.
短句来源
     The changes of the RNA metabolism were studied by the determination of the contents of high molecular weight RNA and poly(A)+RNA as well as the activities of RNase and in the protein synthesis. It has been shown that the contents of high molecular weight RNA and poly(A)+ RNA and the ratio of(poly(A)+RNA)/RNA was increased by ethylene treatment at a concentration of 10 μl/L or higher.
     处理后的果实大分子RNA和poly(A)+RNA水平以及poly(A)+RNA与总RNA的比例均有增高。
短句来源
     But the role of La protein in HBV RNA metabolism in cultured cells is still unknown at present.
     但是在细胞内,La蛋白是否具有类似活性,目前尚不清楚。
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  rna metabolism
We have further characterized a temperature-sensitive mutant of Chinese hamster lung fibroblasts in tissue culture with a defect in RNA metabolism.
      
These changes are occurring at times after nerve injury when marked alterations in RNA turnover have been observed, implicating "alkaline" ribonucleases in the control of RNA metabolism during nerve regeneration.
      
Brain neuronal RNA metabolism during acute soman toxication: Effects of antidotal pretreatments
      
The result indicates a long-lasting disturbance of brain poly(A)+-RNA metabolism by ECS.
      
Involvement of N-cholinergic synapses in regulating RNA metabolism in sympathetic neurons and satellite gliocytes
      
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It was known that most chemical carcinogens could interfere with the synthesis of DNA, RNA and protein. The effect of 261-B_2-3, an extract of Alternaria alternata separated from Linxian county which is a high risk area of esophageal cancer in North China interference on the metabolism of these macromolectules was studied. Experi- ments showed that the synthesis of DNA and protein were partially blocked after exposing to 261-B_2-3 and the inhibition rate showed a relationship to the concentration...

It was known that most chemical carcinogens could interfere with the synthesis of DNA, RNA and protein. The effect of 261-B_2-3, an extract of Alternaria alternata separated from Linxian county which is a high risk area of esophageal cancer in North China interference on the metabolism of these macromolectules was studied. Experi- ments showed that the synthesis of DNA and protein were partially blocked after exposing to 261-B_2-3 and the inhibition rate showed a relationship to the concentration of 261-B_2-3, but 261-B_2-3 gave no evidence of interference of RNA metabolism. Experiments demostrated the difference of action of 261-B_2-3 as inhibiting agent in DNA and protein synthesis. The rate of DNA synthesis decreased with time after the removal of 261-B_2-3 from medium and a valley was found in the curveof DNA synthesis. In contrast to the results with DNA synthesis, the rate of protein increased immediately after the removal of the agent. 261-B_2-3 is regarded as a DNA-damaging agent that inhibits protein synthe sis but does not damage it. The interference of the macromolecules by 261-B_2-3 leads to confusion of cell biology and biochemistry and may play an important role in mutagenicity.

大多数化学致癌物均可影响DNA、RNA和蛋白质合成的过程。本文研究了从食管癌高发区林县粮食中分离出的互隔交链孢霉菌株261提取物261-B_2-3对这些大分子物质合成的影响。研究表明261-B_2-3对DNA和蛋白质的合成有明显的抑制,其作用强度呈明显的浓度相关性。但是它对RNA的合成无明显影响。三种大分子物质的合成对于261-B_2-3的敏感性顺序为:蛋白质>DNA>RNA。261-B_2-3对DNA和蛋白质抑制作用的类型和机理并不相同。在中止261-B_2-3的作用后,DNA的合成率持续下降,形成一谷值,属于模板损伤型,而蛋白质则呈递增型合成曲线,为干扰代谢型。261-B_2-3对大分子合成的干扰导致了细胞生物学和生化过程的紊乱,并有可能在诱变过程中起到一定作用。

A small intranuclear body,termed spherule,mininucleolus,karyosome,nuclear body or coil- ed body,has been reported in the cell of higher plants.This intranuclear body has been suggested to represent products of transcription,to correspond to the complex of transcription,or to be related to the RNA metabolism after transcription.Opinions on its composition are diverse and the origin and functions of the body are still obscure. We studied this intranuclear body,called mininucleolus in our paper,and found...

A small intranuclear body,termed spherule,mininucleolus,karyosome,nuclear body or coil- ed body,has been reported in the cell of higher plants.This intranuclear body has been suggested to represent products of transcription,to correspond to the complex of transcription,or to be related to the RNA metabolism after transcription.Opinions on its composition are diverse and the origin and functions of the body are still obscure. We studied this intranuclear body,called mininucleolus in our paper,and found that the body appeared as an ovoid or spherical structure about 0.3 to 0.5 μm in diameter.The mininu- cleolus was shown,with conventional TEM staining,to be the same electron-dense as the con- densed chromatin,but no structural connections could be found between them.The results of Bernhard's staining and the protein specific staining indicated that the mininucleolus contained both RNA and proteins which formed ribonucleoprotein(RNP)particles about 15 μm in diame- ter.These particles are very similar,in their ultrastructure and chemical composition,to the granular comoonents of the nucleolus.A careful examination revealed that the mininucleoli were formed in the granular region of the nucleolus.After they became separated from the nucleolus,these bodies were distributed throughout the nucleoplasm,suggesting that they may move from the nucleolus to the nuclear membrane.Based on these data,we suggest that the mininucleolus is a non-chromatin intranuclear structure which is formed in the nucleolus and may have a function of transporting ribosomal RNA from the nucleolus to the cytoplasm.

以蚕豆(Vicia faba)根端分生组织细胞为材料研究了微核仁的超微结构和细胞化学特点。结果表明;微核仁是直径0.3—0.5μm 的卵圆形或球形结构。常规染色时,微核仁与集缩染色质的电子密度相仿,但两者之间在结构上没有任何联系。细胞化学研究指出,微核仁含有 RNA 和蛋白质,其结构成分主要是与核仁颗粒组分十分相似的 RNP 颗粒。报道了植物细胞核中微核仁发生于核仁的过程并对微核仁的本质和功能进行了讨论。

The synthesis and degradation of DNA and RNA were studied in the dedifferentiating segments of mung bean (Phaseolus radiatus L. cv. D317-1) cotyledons. The segments expressed a high capacity of dediffirentiation on miller medium containing 1 ppm KT and 4 ppm NAA. Under this condition, the contents of both DNA and RNA increased between day 1 and 7 in culture. Afterward, DNA contents remained basically unchanged, while RNA contents continued to increase slowly. The rates of synthesis of both...

The synthesis and degradation of DNA and RNA were studied in the dedifferentiating segments of mung bean (Phaseolus radiatus L. cv. D317-1) cotyledons. The segments expressed a high capacity of dediffirentiation on miller medium containing 1 ppm KT and 4 ppm NAA. Under this condition, the contents of both DNA and RNA increased between day 1 and 7 in culture. Afterward, DNA contents remained basically unchanged, while RNA contents continued to increase slowly. The rates of synthesis of both DNA and RNA, as measured by H-labelled precursor incorporation, increased rapidly after subculture, then decreased after day 5. However, the synthesis rates of DNA and RNA on day 11 were still 2 and 3 times that of the initial levels, respectively. The activities of DNase and RNase at pH 4.5 and 7. 5 declined simultaneously after subculture, but enhanced continuously between day 5 and 11. These results suggest that the dedifferentiation of mung bean cotyledons is accompanied by the enhancement of DNA and RNA metabolism, especially the acceleration of DNA and RNA synthesis rates, which may be an important characteristic of metabolism in the dedifferentiation of mung bean cotyledons.

本文研究了绿豆(Phaseolus raditus L.cv.D317—1)子叶切段在激素诱导下脱分化过程中DNA和RNA代谢的变化。子叶切段在附加1ppm激动素(KT)和4PPm萘乙酸(NAA)的Miller培养基上表现出较高的脱分化能力。DNA含量和RNA含量在离体培养的前7天增加约2倍,随后DNA含量维持不变,而RNA含量仍缓慢增加;利用同位素掺入法测定的DNA和RNA合成速率,在培养早期迅速增加,第5天时分别增加了2倍和4倍,随后虽有所降低,但仍处于较高水平;DNase和RNase(pH4.5,pH7.5)活性在培养早期有所降低,随后不断增强。这些结果表明,绿豆子叶切段的脱分化过程伴随着DNA和RNA代谢的加强,特别是合成作用,这可能是子叶脱分化的主要代谢特征之一。

 
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