The factors such as introduction of aromatic heterocycle with small delocalization energy, formation of acceptor-donor structure, and strong electron-donating or electron-withdrawing abilities of substituents lead to the high third-order nonlinear optical property.

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The electron withdrawing group being introduced into the alkyl groups of the n -hexyl ZDDP is able to strengthen chemical adsorption between ZDDP and Fe atoms.

在伯烷基上吸電子基團(tuán)能增強(qiáng)硫原子與鐵原子之間的化學(xué)吸附作用力国产欧美日韩大片在线观看。

Hypnotise the rank and file with assurances of a commitment to growth, while stealthily withdrawing various measures of support.

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Process of withdrawing with imbed of the process is contrary.

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Financial institution has the problem of withdrawing from the market, this is a impersonal rule of market economy.

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Low temperature inspissation reflux's withdrawing a machine set is to synthesize a reflux, the 滲漉 withdraws, the against the current withdraws and takes out with hot reflux and lifts and condenses 4 kinds and withdraws principle, withdraw, condensing Chinese herbal medicine two work prefaces carry on in the meantime, a completion Chinese herbal medicine withdraws, concentrated new craft, and change and withdraw the work in the bottle and often press of heat decoction craft, make use of vacuum negative press and carry on low temperature and withdraw low temperature concentrated, make and withdraw work temperature in the bottle a control in 60 ℃~70 ℃, concentrated temperature control in 50 ℃~60 ℃, promised the medicine material valid composition to be steamed not and run off.

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Being; and at the same time the withdrawing of being inwards, its sinking deeper into itself.

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Container Manifolding: Manifolding a number of liquefied, compressed gas containers in parallel permits the user to achieve the required gaseous flow rate by withdrawing product from all containers simultaneously.

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3Rd chapter summarizes the principal character that our country venture capital develops at present, and analyses the problem that our country venture capital there exists in job at present mainly, such as: the government supporting strength to venture capital job is insufficient, risk capital scale is minor, financing gap is big, the venture capital professional is deficient, the venture capital withdrawing from is machine-made wait urgently after perfect.

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Either electron-donating or electron-withdrawing group linked at the intercalation plane may increase the motility of π-bond and the molecular polarization, thus enhancing the intercalation.

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