Browsing by Author "CHIOU, YS"

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OPTICAL-EMISSION SPECTROSCOPY STUDIES OF THE EFFECTS OF NITROGEN ADDITION ON DIAMOND SYNTHESIS IN A CH4-CO2 GAS-MIXTURE
(1995-10-09)
HONG, TM
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CHEN, SH
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CHIOU, YS
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CHEN, CF
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交大名義發表
The influence of nitrogen on the growth of diamond using the gas mixtures of CHS-CO, by microwave plasma chemical vapor deposition was investigated. A clear improvement in the surface morphology and quality of the diamond films indicates the beneficial effect of adding nitrogen to CH4-CO gas mixtures. Analysis using Auger electron spectroscopy and secondary ion mass spectroscopy shows very low and uniform levels of nitrogen in the diamond films. Atomic nitrogen plays a dominant role in C/H/O/N plasma chemical vapor deposition processes because of the amount of oxygen atoms increased via the titration reaction of nitrogen atoms (a high-rate reaction): N+NO-->N-2+O. This produces a significant influence on diamond synthesis in a CH4-CO2-N-2 gas mixture. (C) 1995 American Institute of Physics.
TOXICITY OF BINARY-MIXTURES OF ORGANIC-CHEMICALS
(1995-05-01)
CHEN, CY
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CHIOU, YS
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交大名義發表
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環境工程研究所
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National Chiao Tung University
Toxicity of binary mixtures of organic chemicals was evaluated using the Microtox test, in order to derive a more realistic approach for predicting mixture toxicity. Both additive and less than additive effects were found from binary mixtures of nonreactive toxicants. Concentration addition can be expected between two nonreactive chemicals, provided that the requirement of parallel dose-response curves is fulfilled. The study also identified the conditions for a complex-type joint action to take place. Finally, experimental isobolograms were analyzed based on a bivariate toxicity model to provide a rational estimation of model parameters. The isobolograms and the additive indices generated by this study can be used to predict the combined toxic effects from various organic mixtures. (C) 1995 by John Wiley and Sons, Inc.