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  • Author or Editor: H. -S. Chu x
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Abstract  

As the first part of a two-phase study, 240 documents highly cited in a self-created Chinese database and inScience Citation Index for the period of 1987–89 were examined to delineate the formal structure of communication in superconductivity research. Noteworthy similarities, e.g., analogous cited cores, identical publication sources, and comparable intellectual structures of cocitation data, were found in formal communication between Chinese and non-Chinese scientists. However, differences were also located in citedness, timeliness, and direction of communication.

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Abstract  

Data obtained through letter poll over 143 researchers who authored the 240 highly cited documents (See the first phase of the study) were used to describe the informal aspects of communication between Chinese and non-Chinese superconductivity researchers. While non-Chinese researchers played both roles equally, Chinese scientists were the destination more often than they were the source in informal communication. Chinese scientists were less visible than their counterparts in the informal domain. The mapping of the informal communication activities among the superconductivity researchers shows that all Chinese scientists except Zhao ZX, a special liaison between the two groups of researchers, clustered away from their non-Chinese colleagues.

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Summary

High-performance capillary electrophoresis with amperometric detection (CE-AD) has been used for analysis of eight bioactive components of the leaves, stems, and roots of Valeriana wallichii DC, after a relatively simple extraction procedure with ethanol. Under the optimum conditions, the eight components can be well separated or (apigenin and luteolin) separated nearly to baseline within 23 min by use of 50 mM borax (pH 9.2) as running buffer and a separation potential of 16 kV. Linearity was excellent over two orders of magnitude of concentration and detection limits (S/N = 3) ranged from 1.7 × 10−7 to 1.8 × 10−8 g mL−1. This method was used for comparison of the concentrations of the bioactive compounds in different parts of the plant on the basis of their electropherograms or ‘characteristic electrochemical profiles’. Assay results were satisfactory.

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