tttt
- 网络北京;发现直接
tttt-
It is found that the fraction of TTTT conformation drops rapidly with absorbed doses , while both TG and T3G conformations increase .
研究发现，辐照后薄膜分子链全反构型百分含量随吸收剂量增大而迅速减少，TG构型和T3G构型百分含量显著增多。
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It has a polyA tail-signal sequence ( TAATAAA ) and high-frequency TTTT sequences ( a kind of high conservative region ) .
该序列具有一个polyA加尾信号序列（TAATAAA），并富含连续的TTTT高保守区。
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Adipic acid could advance PVC to form TTTT sequence , and can provide base of the array of fold chains , so it promoted the development of chain-folded crystal .
己二酸能促进PVC分子链形成TTTT构象，并为折叠链排列提供基底，因此能明显促进折叠链状晶体的生长。