Mixed Pi/Alkyl Hydrophobic:π - σ相互作用(有时称为CH-π相互作用)是氢和π环系统之间的弱相互作用。Pi-烷基相互作用存在的情况是,π环的质心和烷基的质心在烷基质心(最大距离)截止范围内(默认为5.5 Å),并且它们至少有一对原子在相同的Pi-Pi最接近的原子(最大距离)截止范围内,用于Pi-Pi相互作用。 ④...
(B)胍-苯叠层(stacked)型(左)和T型(右)相互作用的理想位置和距离描述。 1.2 生物学中一种量化阳离子-π相互作用的方法 待表征的阳离子-π相互作用的生物学作用在实验上不容易量化。通过传统的诱变(mutagenesis )去除苯(Phe)、苯酚(Tyr)或吲哚(Trp)部分的侧链,将完全去除芳香族的π-电子贡献(π-electron ...
[reaction: see text] The effects of pi-stacking on the stability of multiply hydrogen-bonded systems are investigated using hybrid DFT calculations on pi-stacked quadruply H-bonded dimers of ureidopyrimidinone in its different tautomeric forms. Both the strengths of the hydrogen bonds and the relati...
apallets must not be stacked. the filter bags should not be unpacked from the boxes and must remain inside their piastic sheets until installation. 不能堆积板台。 不应该从箱子打开过滤袋,并且必须保持在他们的piastic板料里面直到设施。[translate]...
apallets must not be stacked.the filter bags should not be unpacked from the boxes and must remain inside ther=ir piastic sheets until installation. 板台不能是stacked.the过滤袋不应该从箱子打开,并且必须保持里面there=ir piastic板料直到设施。[translate]...
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The transition from fine-pitch (FP) to ultra fine pitch (UFP) volume production, and the emergence of stacked-die, CSP and ultra low loop bonding has increased the level of difficulties in wire bonding process. In compliance with these new bonding requirements, a new generation and high ...