氢键的影响(Effect of hydrogen bond) 由于分子内或分子间形成氢键,使质子周围的 电子密度降低,产生去屏蔽作用,共振信号向低 场位移,有的可达几个ppm。
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The microparticle could link with pulp fibre through ionic bond and hydrogen bond, from which excellent retention effect of copolymer initiated.
这种微粒和纸纤维能够通过离子键和氢键作用,显著地增强助留效果。
The effect of the ratio of hydrogen peroxide to double bond of allyl group, reaction temperature and reaction time on epoxidation was investigated.
考察了双氧水与烯丙基双键配比、反应温度和反应时间对环氧化反应的影响。
The effect of carbon content of the base metal on the welded bond structure, formation mechanism of the "austenitic-rich zone" and "hydrogen-induced disbonding" etc.
研究了母材碳含量对熔合区形态的影响、“富奥氏体区”形成机理和“氢蚀剥离开裂”产生机理等。
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