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SOURCE PROFILES AND FINGERPRINTS OF FINE AND COARSE SANDS RESUSPENDED FROM SOILS SAMPLED IN CENTRAL INNER MONGOLIA

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China Particuology 2006年第6期4卷 304-311页

作者： chung-shin yuan Chun-Xing Hai Ming Zhao Institute of Environmental Engineering Sun Yat-Sen University 70 Lian-hai Road Kaohsiung 804 Taiwan China College of Geographical Sciences Inner Mongolia Normal University 295 Zhaowuda Road Huhhot Inner Mongolia China

Fingerprints and source profiles of fine and coarse sands that originate from Central Inner Mongolia during Asian continental sandstorms （ACS） can be used to identify the odgin of Asian sands and to trace them as they travel downwind. Soil samples collected at various land surfaces in Central Inner Mongolia were resuspended using a dry powder atomizer in an enclosure chamber. The resuspended sands were then sampled by two dichotomous samplers situated at the bottom of the enclosure chamber for fine （PM2 5） and coarse （PM2.5-10） sands, respectively. The chemical composition of sands, including water-soluble ionic species, metallic contents, and carbonaceous contents, were further analyzed. Results from resuspension tests indicated that the soils contained considerably more coarse particles than fine Moreover, Mg, K, Al, and Fe in coarse sand had strong correlations with each other. The ratio of Mg, K. Fe （or Al） to Al （or Fe） and OC/EC in the coarse sands can be used as the fingerprints of Asian sands originating from Central Inner Mongolia.

关键词： Asian sands resuspension chemical analysis fingerprints source profiles

Development of the procedure for the stabilization of rainwater samples

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Journal of Environmental Sciences 1994年第1期6卷 29-41页

作者： yuan Zhongxin chung-shin yuan(Department of Chemical Engineering National Cheng Kung Univeroity, Tainan.Taiwan)

This paper proposed a procedure of handling a remote rainwater sample to determinethe PH values of the samples immediately after collecting. Then the initial chemical composition inthe stored rainwater was estimated b... 详细信息

关键词： rainwater, regression model acid rain.

亚洲沙尘暴期间在澎湖列岛对大气悬浮颗粒的取样和分析(英文)

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干旱区资源与环境 2004年第S1期18卷 189-197页

作者： chung-shin yuan Cheng-chung Sau Ming-chung Chen Ming-Ho Huang Institute of Environmental Engineering National Sun Yat-Sen UniversityInstitute of Environmental Engineering National Sun Yat-Sen UniversityInstitute of Environmental Engineering National Sun Yat-Sen UniversityInstitute of Environmental Engineering National Sun Yat-Sen University

This study investigated the mass concentration and size distribution of atmospheric aerosols collected at the Pescadores Islands during Asian dust storm periods. An atmospheric aerosol sampling site was established at Xiaumen, Pescadores Islands since March 2001. Xiaumen was at the northwest tip of the Pescadores Islands located at the center of the Taiwan Strait and approximately 110 kilometers from the West Coast of Taiwan Main Island. The sampling protocol was conducted to collect sea level atmospheric aerosols for further physical and chemical analysis. This study revealed that five Asian dust storms invaded the Pescadores Islands during the sampling campaign. The mass concentration of atmospheric aerosols, particularly PM 2.5-10 , were 2-3 times higher than background levels (i.e. non-Asian dust storm periods). Comparison of hourly PM 10 concentration between Xiaumen and ambient air quality monitoring stations in Taiwan indicated that Asian dust storms usually invaded from either the northeast or the northwest and could last for approximately 2-4 days. Moreover, Asian dusts could be preliminarily validated in situ by observing the change of their apparent colors from dark gray to light brown. Increasing both PM 10 concentration and coarse particle mode in the size distribution of atmospheric aerosols validated the invasion of Asian dust storms. Significant increase of SO 4 -2 , Cl -, Na +, NH 4 +, Mg +2 and Ca +2 concentration on coarse particle mode was also observed for Asian dusts. This suggested that not just natural soil dusts but also anthropogenic pollutants and oceanic spray could accompany the Asian dust storms and arrive at the Pescadores Islands.

关键词：亚洲沙尘暴悬浮颗粒澎湖列岛英文 yellow researches Master over have

Influences of Fireworks Display on Gaseous Ambient Air Pollutants and Titration Effects during the Taiwanese Lantern Festival

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Influences of Fireworks Display on Gaseous Ambient Air Pollu...

Dual‑Donor‑Induced Crystallinity Modulation Enables 19.23% Efficiency Organic Solar Cells

十一届全国气溶胶会议暨第十届海峡两岸气溶胶技术研讨会

作者： chung-shin yuan Chang-Gai Lee 台灣中山大學環境工程研究所大仁科技大學觀光事業系

The display of fireworks is a traditional way to celebrate very important Chinese festivals such as New Year and Lantern Festival. This study investigated the influences of firework displays on ambient air quality during the Taiwanese Lantern Festival in Kaohsiung City. Both of the organic(methane, NMHC, THC, benzene and toluene) and inorganic(NO, NO2, SO2, CO, and O3) gaseous pollutants were measured to fulfill the investigation. For organic gaseous pollutants, an increasing of THC concentration due to the firework displays was found. The concentration peaks of THC were caused mainly by the obvious increase of NMHC. The concentrations of NMHC were approximately 2.3 times higher than those during the non-firework periods. Moreover, the concentration peak of toluene during the firework periods was approximately 2.2.1 times higher than those during the non-firework periods, while benzene remained almost the same level as usual. For the inorganic gaseous pollutants, the concentration peaks of NO, NO2 and CO were observed during the firework displays periods. The concentrations of NO and NO2 was approximately twice and 3 times higher than those during the non-firework periods, respectively. This study further revealed that, even at nighttime, ambient O3 could be reduced dramatically during the firework periods, when as NO2 concentration increased concurrently, due to titration effects resulting from the prompt reaction of NO with O3 to form NO2 and O2. This study revealed that firework displays for celebrating the Taiwanese Lantern Festival contributes significantly high amount of gaseous pollutants to the atmosphere of Kaohsiung City.

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Nano-Micro Letters 2025年第3期17卷 376-388页

作者： Anhai Liang Yuqing Sun Sein chung Jiyeong shin Kangbo Sun Chaofeng Zhu Jingjing Zhao Zhenmin Zhao Yufei Zhong Guangye Zhang Kilwon Cho Zhipeng Kan Center On Nanoenergy Research Institute of Science and Technology for Carbon Peak&NeutralitySchool of Physical Science&TechnologyGuangxi UniversityNanning 530004People’s Republic of China Department of Chemical Engineering Pohang University of Science and TechnologyPohang 37673South Korea College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118People’s Republic of China Zhejiang Engineering Research Center for Fabrication and Application of Advanced Photovoltaic Materials School of Materials Science and EngineeringNingboTech UniversityNingbo 315100People’s Republic of China State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures Nanning 530004People’s Republic of China

Trap-assisted charge recombination is one of the primary limitationsof restricting the performance of organic solar cells. However, effectivelyreducing the presence of traps in the photoactive layer remains ***, wide bandgap polymer donor PTzBI-dF is demonstrated as an effectivemodulator for enhancing the crystallinity of the bulk heterojunction active layerscomposed of D18 derivatives blended with Y6, leading to dense and orderedmolecular packings, and thus, improves photoluminescence quenching *** a result, the photovoltaic devices exhibit reduced trap-assisted charge recombinationlosses, achieving an optimized power conversion efficiency of over 19%.Besides the efficiency enhancement, the devices comprised of PTzBI-dF as athird component simultaneously attain decreased current leakage, improved chargecarrier mobilities, and suppressed bimolecular charge recombination, leading toreduced energy losses. The advanced crystalline structures induced by PTzBI-dFand its characteristics, such as well-aligned energy level, and complementaryabsorption spectra, are ascribed to the promising performance *** findings suggest that donor phase engineering is a feasible approach to tuning the molecular packings in the active layer, providingguidelines for designing effective morphology modulators for high-performance organic solar cells.

关键词： Trap-assisted charge recombination Photoluminescence Miscibility Current leakage Power conversion efficiency

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内蒙古自治区土壤及沙尘指纹特征之比较分析

过程工程学报 2006年第z2期6卷 155-159页

作者：袁中新林志逢刘乙琦海春兴赵明台湾中山大学工学院环境工程研究所哈尔滨工业大学市政环境学院环境科学与工程系黑龙江哈尔滨150001 内蒙古师范大学地理科学学院地理系内蒙古呼和浩特010022

探讨了内蒙古自治区内3个不同沙源区土壤再悬浮沙尘指纹特征,做为追踪与判断下风影响区域亚洲沙尘的依据,并以理清亚洲沙尘传输路径.于内蒙古自治区沙源地采集30个土壤样本,携回实验室重新悬浮后,以双粒径分道采样器(Dichotomous sampl... 详细信息

探讨了内蒙古自治区内3个不同沙源区土壤再悬浮沙尘指纹特征,做为追踪与判断下风影响区域亚洲沙尘的依据,并以理清亚洲沙尘传输路径.于内蒙古自治区沙源地采集30个土壤样本,携回实验室重新悬浮后,以双粒径分道采样器(Dichotomous sampler)进行悬浮微粒(PM2.5及PM2.5-10)采样,再分析土壤及沙尘化学成分,分析项目包括水溶性离子成分、碳成分、金属元素成分等.化学成分分析结果显示,内蒙古自治区沙源地的指纹特征为(1)PM2.5-10/PM10>0.74,(2)OC/EC<1.0.本研究也发现人为污染物(如SO42-,NO33,NH4+)也存在于沙尘微粒中.

关键词：亚洲沙尘沙源地化学成分分析指纹特征

Stellate cells regulate Nrf2 signaling to orchestrate metabolic changes and ROS detoxification in pancreatic cancer cells

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中国药理学与毒理学杂志 2015年第S1期29卷 86-87页

作者： yuan-sengWU chung-yengLOOI MasamuneATSUSHI shin-yeeFUNG chungIVY Department of Pharmacology Faculty of Medicine University of Malaya University of Malaya Cancer Research Institute University of Malaya Division of Gastroenterology Tohoku University Graduate School of Medicine Department of Molecular Medicine Faculty of Medicine University of Malaya

OBJECTIVE We previously showed that human pancreatic stellate cells(HPSCs)promote pancreatic ductal adenocarcinoma(PDAC)cell growth by activating nuclear factor erythroid2-related factor 2(Nrf2),a key transcriptional regulator of cytoprotective *** aim to investigate whether Nrf2-mediated metabolic reprogramming and reactive oxygen species(ROS)detoxification are involved in HPSCs-mediated cell *** Nrf2-mediated metabolic genes expression of pentose phosphate pathway(PPP)for purine nucleotide synthesis;glutamine metabolism for nicotinamide adenine dinucleotide phosphate(NADPH)-equivalent producers and also glutathione biosynthesis both for intracellular ROS inactivation were examined using quantitative real-time PCR(qRT-PCR)after treated with conditioned media derived from HPSCs(HPSC-CM)in human PDAC cells(BxPC-3and AsPC-1)with or without Nrf2 gene silencing using siRNA-mediated *** involved in PPP for purine nucleotide and NADPH generation were selected and their concentration was measured using UHPLC-MS/***,tiron and N-acetylcysteine(NAC)were used to attenuate the intracellular ROS rendered by Nrf2 before measuring PDAC cell growth and also phosphorylation of extracellular signal-regulated kinase(ERK)1/2and protein kinase B(AKT)using MTT and Western blotting,*** Metabolically,HPSC-CMupregulated Nrf2-mediated genes involved in three metabolic pathways(G6PD,PGD,TKT,PPAT,MTHFD2,ME1,IDH1,GCLC and GCLM)in BxPC-3and ***-CM was able to upregulate all the metabolic genes after Nrf2 gene silencing,and also significantly increased the metabolite concentration of ribose 5-phosphate and inosine 5′-monophosphate,which are involved in nucleotide synthesis for cell *** the intracellular ROS rendered by Nrf2 suppressed PDAC cell growth and also phosphorylation of ERK 1/2and AKT *** Our findings reveal that HPSC-CM activates Nrf2-mediated metabolic reprogramming,which leads to p

关键词： pancreatic stellate cells pancreatic ductal adenoc

Enhancing polyphenol extraction from unripe apples by carbohydrate-hydrolyzing enzymes

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第12期10卷 912-919页

作者： In-Wook HWANG shin-Kyo chung Department of Food Science and Technology Kyungpook National University Daegu 702-701 Korea

The effects of process variables such as enzyme types, enzyme ratio, reaction temperature, pH, time, and ethanol concentration on the extraction of unripe apple polyphenol were investigated. The results indicated that Viscozyme L had the strongest effect on polyphenols extraction and was selected to study the polyphenol composition. The ratio of enzyme （Viscozyme L） to sobstrate （2 fungal beta-glucanase units （FBG）） at 0.02, reaction at pH 3.7, 50℃ for 12 h, and ethanol concentration of 70% were chosen as the most favorable extraction condition. Total phenolic content （TPC）, reducing sugar content （RSC）, and extraction yield increased by about 3, 1.5, and 2 times, respectively, compared with control. The contents ofp-coumaric acid, ferulic acid, and caffeic acid increased to 8, 4, and 32 times, respectively. The enzyme-aided polyphenol extraction process from unripe apples might be applied to food industry for enhancing bioactive compound production.

关键词： Carbohvdrate-hvdrolvzim enzvmes. Unrioe aonles. Polvnhenol extraction. Caffeic acid

Effects of dispersoid preforming via multistep sintering of oxide dispersion-strengthened CoCrFeMnNi high-entropy alloy

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Journal of Materials Science & Technology 2023年第9期140卷 187-200页

作者： SeungHyeok chung Ji Ho shin Ho Jin Ryu Department of Nuclear and Quantum Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Central Research Institute Korea Hydro and Nuclear Power Co.Ltd.(KHNP)Daejeon 34101Republic of Korea

Dispersoid formation and microstructural evolution in an oxide dispersion-strengthened CoCrFeMnNi high-entropy alloy(HEA)using a newly designed multistep sintering process are *** proposed multistep sintering consists of a dispersoid preforming heat treatment of as-milled 0.1 wt%Y_(2)O_(3)-CoCrFeMnNi high-entropy alloy powders at 800℃,followed by sintering at 800–1000℃ under uniaxial *** the conventional single-step sintered bulk,the coarsened BCC Y_(2)O_(3)dispersoids mainly form with an incoherent interface with the HEA *** contrast,finer FCC Y_(2)O_(3)dispersoids,an atypical form of Y_(2)O_(3),are formed in the matrix region after multistep *** of FCC Y_(2)O_(3)disper-soids is initiated on the favorable facet,the{111}plane of the austenitic matrix,with the formation of a semi-coherent interface with the matrix during the dispersoid preforming heat treatment and it maintains its refined size even after *** is found that dispersoid preforming prior to sintering appears promising to control the finer dispersoid formation and refined grain structure.

关键词： Oxide dispersion strengthening High-Entropy alloy Multistep sintering Dispersoid preforming Microstructure evolution Interfacial structure