Zhihua Ma

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Taken 37 bio-pharmaceutical companies on SME board in China, this papers constructs a growth evaluation indicator system for these companies by operating income growth rate, net profits, sales net profit, returns on total asset, ROE, debt to equity, current ratio, working capital ratio, turnover of current asset, and turnover of total asset. By way of(More)
Self-host heteroleptic green iridium(III) dendrimers have been designed and easily synthesized. Through tuning the carbazole dendron density, high efficiency is achieved using these dendrimers with a simple molecular structure as the emitting layer for the non-doped organic light-emitting diodes.
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