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A new principle of synthetic cascade utilization of chemical energy and physical energy

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Science china(Technological {1.) 2005年第2期48卷 163-179页

作者： JIN Hongguang1. HONG Hui1.2. WANG Baoqun1.2. HAN Wei1.2.& LIN Rumou1.2.1. institute of Engineering Thermophysics,{2., Beijing 1.0080, china 2. Graduate School of the{2., Beijing 1.0039, china 1. institute of Engineering Thermo{1. Chinese Academy of Sciences 100080 Beijing China 2. Graduate School of the{1. 100039 Beijing China

We propose a new principle of the cascade utilization of both chemical energy and physical energy in energy systems with the integration of chemical processes and thermal cycles. Particularly, a general equation of energy levels of substance, Gibbs free energy of chemical reaction and physical energy is explicitly founded. On the basis of this equation, a chemical-looping combustion and an indirect combustion are investigated. Furthermore, a mechanism of energy release, with the combination of decreasing the energy level of Gibbs free energy and upgrading the energy level of low or middle- temperature thermal energy, is clarified. The promising results obtained here establish a theoretical basis for the further investigation of multi-function systems in which energy and the environment are compatible, and create a new approach to improve the performance of traditional thermal cycles.

关键词： chemical energy, cascade utilization, exergy, energy conversion.

Simulating the transfer and fate of hexachlorocyclohexane in recent 50 years in Beijing, china

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Science china Earth {1. 2005年第12期48卷 2203-2213页

作者： CAO Hongying1. LIANG Tao1.& TAO Shu2.1. {1. of Geographical sciences and Natural Resources Research,{2., Beijing 1.01.1. china 2. laboratory for Earth Surface Processes, Peking University, Beijing 1.0871. china 1. institute of Geographical {1. and Natural Resources Research Chinese Academy of Sciences 100101 Beijing China 2. {1. for Earth Surface Processes Peking University 100871 Beijing China

Taking Beijing as a study area, a dynamic fugacity model was used to simulate the transfer and fate of technical HCHs according to the physic-chemical properties of the studying environment and HCH isomers. Dynamic changes of the transfer fluxes and concentrations of HCH isomers during 1.5{1.{1.03 were simulated and the model results suggest good agreement between the calculated and measured concentrations of HCH isomers. During 1.5{1.1.83, the average input and output amount of HCHs through agricultural application and degradation are 1.0 t and 1.0 t respectively. The dominant transfer processes of HCHs in the study area are air-soil deposition, soil erosion and soil-air diffusion, transfer fluxes of these processes are 80 t?a?1. 1. t?a?1.and 1. t?a?1. which account for 9{1. of total transfer fluxes of HCHs isomers. There were approximately {1.3t HCHs in all environmental compartments of the study area during this period and 97% of which existed in soil compartment. Air and water advection became the dominant input sources of HCHs after 1.84 when the application of technical HCHs was prohib-ited, concentration of HCHs quickly descended to a quite low level in several years. Total amount of HCHs isomers remaining in the study area environment now is less than 5% that before 1.83, and this percentage may descend to 0.5% after {1. years by prediction.

关键词： fugacity model, hexachlorocyclohexane, compartment, transfer flux, fate.

HPLC of Amino Acids and Oligopeptides by Pre-Column Fluorescence Derivatization with 9-Acridine Formyl Chloride

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chinese {1. Letters 1997年第10期8卷 875-878页

作者： Jin Mao YOU Xin Jun FAN Qing Yu OU(lanzhou {1. of {2. physics. chinese academy of sciences 730000) chinese ACAD SCI LANZHOU INST CHEM PHYSLANZHOU 730000PEOPLES R CHINA

A highly sensitive HPLC method for the detection of amino acids and oligopeptides with 9-acridine formyl chloride by pre-column fluorescence derivatization has been developed. Glycine, glycylglycine, histidine, triglycine and glutathione were separated on a reversed-phase C-1. column with methanol-water-triethylamine eluent, derivatization and chromatographic conditions were optimized. The five derivatives were eluted in 2. min with a good reproducibility. Linear range of the calibration graph was 0.08-2.0 nmol/ml(-1.. The relative standard deviations(n=6) are 2.-40 fmol.

关键词： HPLC of Amino Acids and Oligopeptides by Pre-Column Fluorescence Derivatization with 9-Acridine Formyl Chloride

Heterometallic Cluster Catalyzing Coordinative Hydrogenation Promoted by Oxygen Transfer Reagent

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分子催化 1998年第1期 2-3页

作者： LI Qingshan DING Errun WU Shulin YIN Yuanqi 1. (lanzhou {1. of {2. physics The chinese academy of sciences lanzhou 730000)

ＨｅｔｅｒｏｍｅｔａｌｉｃＣｌｕｓｔｅｒＣａｔａｌｙｚｉｎｇＣｏｏｒｄｉｎａｔｉｖｅＨｙｄｒｏｇｅｎａｔｉｏｎＰｒｏｍｏｔｅｄｂｙＯｘｙｇｅｎＴｒａｎｓｆｅｒＲｅａｇｅｎｔＬＩＱｉｎｇｓｈａｎＤＩＮＧＥｒｒｕｎＷＵＳ... 详细信息

ＨｅｔｅｒｏｍｅｔａｌｉｃＣｌｕｓｔｅｒＣａｔａｌｙｚｉｎｇＣｏｏｒｄｉｎａｔｉｖｅＨｙｄｒｏｇｅｎａｔｉｏｎＰｒｏｍｏｔｅｄｂｙＯｘｙｇｅｎＴｒａｎｓｆｅｒＲｅａｇｅｎｔＬＩＱｉｎｇｓｈａｎＤＩＮＧＥｒｒｕｎＷＵＳｈｕｌｉｎＹＩＮＹｕａｎｑｉ１）（...

关键词： Heterometallic cluster Hydrogenation Oxygen transfer reagent Homogeneous catalysis

The Effect of CaAl2.4 Spinel on Ni/Al2.3 Catalyst for CH4/O2.to-Syngas Reaction

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分子催化 1997年第3期 6-7页

作者： LU Yong LIU Yu SHEN Shikong (lanzhou {1. of {2. physics The chinese academy of sciences lanzhou 730000)

ＴｈｅＥｆｅｃｔｏｆＣａＡｌ２Ｏ４ＳｐｉｎｅｌｏｎＮｉ／Ａｌ２Ｏ３ＣａｔａｌｙｓｔｆｏｒＣＨ４／Ｏ２－ｔｏ－ＳｙｎｇａｓＲｅａｃｔｉｏｎ１）ＬＵＹｏｎｇＬＩＵＹｕＳＨＥＮＳｈｉｋｏｎｇ（ＬａｎｚｈｏｕＩｎｓｔｉｔｕｔ... 详细信息

ＴｈｅＥｆｅｃｔｏｆＣａＡｌ２Ｏ４ＳｐｉｎｅｌｏｎＮｉ／Ａｌ２Ｏ３ＣａｔａｌｙｓｔｆｏｒＣＨ４／Ｏ２－ｔｏ－ＳｙｎｇａｓＲｅａｃｔｉｏｎ１）ＬＵＹｏｎｇＬＩＵＹｕＳＨＥＮＳｈｉｋｏｎｇ（ＬａｎｚｈｏｕＩｎｓｔｉｔｕｔｅｏｆＣｈｅｍｉｃａｌＰｈｙｓｉｃ...

关键词： Methane Partial oxidation Syngas CaAl 2. 4 spinel Ni catalyst

Research progress in synthesis and catalysis of polyoxometalates

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Progress in Natural Science:Materials International 2005年第5期15卷 385-394页

作者： GONG Yun1. HU Changwen1.* and LIANG Hong2.1. Department of Chemistry, School of Science, the {1. for chemical {2., Beijing {1. of Technology, Beijing 1.0081. china 2. chemical Industry Press, Beijing 1.002., china) Department of Chemistry School of Science the Institute for Chemical Physics Beijing Institute of Technology Beijing 100081 China chemical Industry Press Beijing 100029 China

Recent progress in the synthetic chemistry and catalysis of polyoxometalates (POMs) is reviewed. The novel POMs and their derivatives emerging in nearly three years (2.02.2.04) are introduced, including POMs with novel structure, POMs-organic hybrid compounds and host-guest complexes. Our review is focused on the elaboration of POMs' supramolecular chemistry.

关键词： polyoxometalates hybrid host-guest structure supramolecule catalysis.

Dry electrode for the measurement of biopotential signals

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Science china(Information {1.) 2011年第11期54卷 2435-2442页

作者： WANG Yu 1,2.PEI WeiHua 2.GUO Kai 2.GUI Qiang 2.LI XiaoQian 2.CHEN HongDa 2.& YANG JianHong 11 institute of Microelectronics,School of Physical Science and Technology,lanzhou University{2.,china 2.State Key laboratory on Integrated Optoelectronics,institute of Semiconductors,chinese academy of sciences,Beijing 100083,china 1. institute of Microelectronics School of Physical Science and Technology Lanzhou University Lanzhou 730000 China2. State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

This paper introduces a kind of silicon-based dry electrode for measuring biological *** uses microneedle arrays to penetrate into the stratum corneum to reduce skin *** dry electrode requires neither skin preparation nor the electrolytic gel,is easy to use and causes no skin *** different technologies are chosen to manufacture microneedle arrays of dry *** is deep dry etching combined with isotropic wet *** other is mechanical dicing combined with chemical wet etching (including isotropic wet etching and anisotropic wet etching).Microneedle arrays are coated with metal and divided into {1. mm {1.as dry electrode *** testing shows that the impedance value of dry electrode can be comparable with that of commercial electrode in the {1. Hz-1. kHz frequency *** steady-state visual evoked potential recording and analysis prove that the dry electrode can be used to detect electroencephalography.

关键词： dry electrode microneedle array dry etching wet etching EEG