DNA链按每次一个基本单元的速度缓慢通过，同时沿石墨烯面加上一个电压。
A voltage is applied along the graphene surface as DNA strands are passed slowly through the slit one base at a time.
既然富烯不显示环电流存在的迹象，所以质子的化学位移仍然发生在正常的链烯区。
Since fulvenes show no evidence of ring currents, the chemical shifts of the protons will be found in the normal definite region.
首先以茄尼醇合成全反式侧链四十碳十烯-1-醇，再和2，3-二甲氧基-5-甲基-1，4-苯醌的还原产物在无水氯化锌存在下缩合。
All - E long chain part was synthesized from solanesol, then condensed with the reductive product of 2,3 - dimethoxy - 5 - methyl -1,4- benzoquinone in the presence of dry ZnCl2.
本文报道了两类主链含四硫富瓦烯(ttf)结构的聚醚高弹体的合成及其电性能的研究。其结构已证实。
Two kinds of polyether elastomers containing TTF structures in the main chain have been synthesized and their structures have been identified.
本工艺程序提供了从链烯、环烯、芳链烯、链烷醇、环烷醇、芳烷醇来制备过氯酸烃基酯的方便方法。
The process provides a facile way of producing hydrocarbyl perchlorates, from alkenes, cycloalkenes, aralkenes, alkanols, cycloalkenes and aralkanols .
结果验证了在石墨烯上成功引入各种有机基团，如羟基、羧基、氨基、溴基、长链烷基、聚乙二醇、聚苯乙烯等。
The results demonstrate the successful introduction of various organic moieties on graphene, such as hydroxyl, carboxyl, amino, bromine, long alkyl chain, polyethylene glycol, and polystyrene.
该染料甲川链上的碳原子与氨基的氮原子相连，而该氮原子又与染料的甲川链形成烯胺。
The meso carbon atom of the methine linkage of the dye is attached to the nitrogen atom of a group which forms an enamine with the methine linkage of the dye .
介绍海洋中长链烯酮研究最新进展的同时，着重阐述了湖泊中长链烯酮研究现状及存在的主要问题。
New progresses in the study of long-chain alkenones in the ocean are introduced. At the same time the paper also presents the progresses in the lacustrine field.
本发明茼蒿素类化合物及其合成方法与应用，该化合物具有烯醇醚-螺环缩酮-缩醛和不饱和侧链。
The invention relates to garland chrysanthemum extract compounds, and a synthesis method and application thereof. The compounds have enol ether-spiro ketal-acetals and unsaturated side chains.
原油中存在不饱和链状化合物及其高的CPI值和甾烯醇都说明原油具有低的成熟度。
The existence of abundant unsaturated liner compounds and stenols as well as high CPI values of liner compounds shows the low maturity of the crude oils.
本发明涉及一种用于制备链烯基化的羟化芳族化合物、苯并二氢吡喃化合物和其酰化衍生物的方法。
The present invention relates to a process for the manufacture of alkenylated hydroxylated aromatic compounds, of chroman compounds and of their acylated derivatives.
PUUA分子链在烯溶液中呈较舒展的构象，分子尺寸小于纳米氧化硅的粒径。
The results indicated that the conformation of the PUUA chains was in stretched conformation in dilute solution, and the average molecular size was smaller than the diameter of silica particles.
PUUA分子链在烯溶液中呈较舒展的构象，分子尺寸小于纳米氧化硅的粒径。
The results indicated that the conformation of the PUUA chains was in stretched conformation in dilute solution, and the average molecular size was smaller than the diameter of silica particles.
应用推荐