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Journal of Environmental Sciences 2011年第9期23卷 1452-1459页

作者： Tianran chen Kefu Yu shu li Tegu chen Qi Shi Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China

Barium to calcium （Ba/Ca） ratio in corals has been considered as a useful geochemical proxy for upwelling,river flood and other oceanic ***,recent studies indicated that additional environmental or biological factors can influence the incorporation of Ba into coral *** this study,Ba/Ca ratios of two Porites corals collected from Daya Bay,northern South China Sea were ***/Ca signals in the two corals were ‘anomalous’ in comparison with Ba behaviors seen in other near-shore corals influenced by upwelling or riverine *** Ba/Ca profiles displayed similar and remarkable patterns characterized by low and randomly fluctuating background signals periodically interrupted by sharp and large synchronous peaks,clearly indicating an environmental *** analysis indicated that the Ba/Ca profiles were not correlated with previously claimed environmental factors such as precipitation,coastal upwelling,anthropogenic activities or phytoplankton blooms in other *** maxima of Ba/Ca appeared to occur in the period of Sr/Ca maxima,coinciding with the winter minimum temperatures,which suggests that the anomalous high Ba/Ca signals were related to winter-time low sea surface *** speculated that the Ba/Ca peaks in corals of the Daya Bay were most likely the results of enrichment of Ba-rich particles in their skeletons when coral polyps retracted under the stresses of anomalous winter low *** this case,Ba/Ca ratio in relatively high-latitude corals can be a potential proxy for tracing the low temperature stress.

关键词： Ba/Ca barium Porites coral cold water stress northern South China Sea

The MELD scoring system for predicting prognosis in patients with severe hepatitis after plasma exchange treatment

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Hepatobiliary & Pancreatic Diseases International 2007年第5期6卷 492-496页

作者： Yu, Jian-Wu Wang, Gui-Qiang Zhao, Yong-Hua Sun, li-Jie Wang, shu-Qin li, shu-chen Harbin Med Coll Dept Infect Dis Affiliated Hosp 2 Harbin 150086 Peoples R China Peking Univ First Hosp Dept Infect Dis Beijing 100034 Peoples R China

BACKGROUND: Hepatic failure caused by severe hepatitis is a clinical syndrome where the major liver functions, particularly detoxification, synthetic functions, and metabolic regulation are impaired to different degrees, and may result in major life-threatening complications such as hepatic encephalopathy, ascites, jaundice, cholestasis, bleeding and hepatorenal syndrome. Plasma exchange (PE) has been found useful in treating patients with fulminant hepatic failure by removing hepatic toxins and replacement of clotting factors, so PE treatment has temporary supportive effects on liver failure caused by severe viral hepatitis. in this study, our aim was to predict the prognosis of patients with severe hepatitis after PE treatment using the end-stage liver disease (MELD) scoring system. METHODS: Two hundred and twenty patients were randomly divided into PE and control groups, and the MELD score was calculated for each patient according to the original formula. The efficacy of PE was assessed by mortality or improvement in biochemical parameters and MELD score. RESULTS: The levels of total bilirubin and international normalised ratio (INR) in patients whose MELD scores were between 30 and 39 were lower than those before PE treatment, as those in patients whose MELD scores were 40 or higher. The mortality of patients in the PE group with MELD scores from 30 to 39 was 50.0%, while it was 83.3% in the control group (Plity of patients with MELD scores higher than 40 was 90.0% in the PE group and 98.0% in the control group (P>0.05). CONCLUSIONS: PE treatment can decrease the serum total bilirubin level and INR and MELD score of patients with severe hepatitis and improve liver function. Compared with the control group, PE can significantly decrease the mortality of patients with MELD scores from 30 to 39, but has no effect in patients with MELD scores of 40 or higher.

关键词： severe hepatitis model for end-stage liver disease plasma exchange mortality

liver transplantation for late-onset ornithine transcarbamylase deficiency:A case report

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World Journal of Clinical Cases 2022年第18期10卷 6156-6162页

作者： Xiao-Hui Fu Yu-Hui Hu Jian-Xiang liao li chen Zhan-Qi Hu Jia-Lun Wen shu-li chen Department of Inherited Metabolic Disorders The Affiliated Hospital of China Medical University and Shenzhen Children’s HospitalShenzhen 518038Guangdong ProvinceChina Department of Neurology The Affiliated Hospital of China Medical University and Shenzhen Children’s HospitalShenzhen 518038Guangdong ProvinceChina

BACKGROUND Ornithine transcarbamylase deficiency(OTCD)is an X-linked inherited disorder and characterized by marked elevation of blood *** goal of treatment is to minimize the neurological damage caused by *** can be cured by liver transplantation(LT).Post-transplant patients can discontinue anti-hyperammonemia agents and consume a regular diet without the risk of developing *** neurological damage caused by hyperammonemia is almost *** SUMMARY An 11.7-year-old boy presented with headache,vomiting,and altered *** patient was diagnosed with late-onset *** nitrogen scavenging treatment and a protein-free diet,ammonia levels were reduced to normal on the third day of ***,the patient remained in a moderate *** discussion,LT was *** LT,the patient’s blood ammonia and biochemical indicators stabilized in the normal range,he regained consciousness,and his nervous system function significantly *** months after LT,blood amino acids and urine organic acids were normal,and brain magnetic resonance imaging showed a decrease in subcortical *** LT can significantly improve partial neurological impairment caused by late-onset OTCD hyperammonemic encephalopathy,and LT can be actively considered when early drug therapy is ineffective.

关键词： Ornithine transcarbamylase deficiency Urea cycle disorder Hyperammonemic encephalopathy liver transplantation Case report

Simultaneous Determination of Gold and Platinum by Double Artificial Neural Network Analysis with Flow-injection Chemiluminescence

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Chinese Chemical Letters 2006年第10期17卷 1343-1346页

作者： Ming Yang liU Hai Tao ZHANG Jun Feng li shu Gui chen Hong Yan WANG College of chemistry Jilin University Changchun 130012

A highly sensitive double artificial neural network （DANN） analysis with flow-injection chemiluminescence （FI-CL） has been developed to simultaneously determine the trace amounts of the gold and platinum in simula... 详细信息

关键词： Double artificial neural networks flow-injection chemiluminescence simultaneous determination gold and platinum.

Pore-Directed Solid-State Selective Photoinduced E–Z Isomerization and Dimerization within Metal–Organic Frameworks

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CCS Chemistry 2023年第5期5卷 1225-1232页

作者： shu-li chen Yan Mi Fei-Long Hu David James Young Jianping Lang Key Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs CommissionGuangxi Minzu UniversityNanning 530006Guangxi College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123Jiangsu College of Engineering IT and EnvironmentCharles Darwin UniversityDarwin 0909Northern Territory

Design and construction of suitable pore microenvironments for selective catalytic reactions of small guest molecules is a major goal for ***,we report control of competitive E–Z photoisomerization and photodimerization within porous metal–organic frameworks(MOFs)by fine-tuning the pore microenvironments using different dicarboxylate *** with small pores((E)-X_(MOF_(1))and(E)-X_(MOF_(1))′)favor the photoinduced E–Z isomerization of one encapsulated diaryl alkene substrate while those with large pores(((E)-X)_(2MOF_(2)))prefer the photodimerization of two encapsulated alkene *** reactions show broad functional group compatibility and proceed stereospecifically in good yields under mild *** local concentration of diaryl alkene ligands and their preorientation within pores facilitate stereoselective *** pore engineering strategy is applicable to control and create pore microenvironemnts for other photoinduced organic reactions within porous MOFs.

关键词： pore engineering E–Z photoisomerization photodimerization metal–organic frameworks solid-state reaction

Structural Properties of Ions and Polyelectrolytes in Aqueous Solutions under External Electric Fields:The Sign Effect

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Chinese Journal of Polymer Science 2024年第9期42卷 1341-1352,I0007页

作者： cheng-Jiang lin Jun-Jun Wang Yuan Jiang shu-li chen Hong-Fei li Wen-Han Zhao Qing-Rong Huang Chang-Ru Rong Xiao-Zheng Duan State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China National Key Laboratory of Advanced Vehicle Integration and Control China FAW Group Co.Ltd.Changchun130013China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200438China Department of Food Science Rutgers University65 Dudley RoadNew BrunswickNew Jersey08901USA

We utilize molecular dynamics simulations to investigate the microstructures of ions and polyelectrolytes in aqueous solutions under external electric *** focusing on the multi-body interactions between ionic components and H_(2)O molecules,as well as their responses to the external electric fields,we clarify several nontrivial molecular features of the ionic and polyelectrolyte solutions,such as the solvations of cations and anions,clustering of the ions,and dispersions/aggregations of polyelectrolyte chains,as well as the corresponding responses of H_(2)O molecules in these *** simulations illustrate the variations in structures of ionic solutions caused by reversing the charge sign of the ions,and elucidate the disparity in structures between anionic and cationic polyelectrolyte solutions in the presence of the external electric *** work clarifies the mechanism for the alternations in complex multi-body interactions in aqueous solutions caused by the application electric field,which can contribute to the fundamental understanding of the physical and chemical natures of ion-containing and charged polymeric systems.

关键词： Polyelectrolyte Ions Aqueous solutions External electric fields Asymmetric dipole

Cerium enrichment on sinter skin of mischmetal doped WC-Co cemented carbide

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Journal of Central South University of Technology 2005年第z1期12卷 5-8页

作者： ZHANG li chen shu XIONG Xiang-jun HUANG Bai-yun ZHANG Chuan-fu State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China Changsha Mining and Metallurgy Research Institute Changsha 410012 China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China School of Metallurgical Science and Engineering Central South University Changsha 410083 China

Rare earth-doped WC-Co cemented carbides with low carbon-containing level were prepared by adding mischmetal (mainly containing lanthanum and cerium) in the form of cobalt pre-alloyed powder during *** sintering, the sinter skin (exterior) was observed and analyzed by scanning electron microscopy(SEM)and energy disperse X-ray spectroscopy(EDXS). The results show that during the sintering process lanthanum and cerium are separated and cerium predominantly migrates towards the surface forming precipitates containing *** analysis and polarization of cerium atom caused by the strong interaction between cerium atoms and high energy carbon atoms were used in explaining the observed phenomenon.

关键词： hardmetal lanthanum cerium atom polarization thermoldynamics enrichment

Thermochemistry study on H2O/NaY zeolite adsorption system

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Chinese Journal of Chemistry 1988年第1期6卷 7-13页

作者： ZHOU li-Xing chen shu-Xia ZHENG Lu-Bin Dalian Institute of Chemical Physics,Academia Sinica,Dalian Dalian Institute of Chemical Physics Academia Sinica Dalian

By using an automatic adiabatic calorimeter the heat capacity measurements in the tem-perature range of 220—320K for HO/NaY zeolite adsorption system with various amounts of adsorbedwater have been *** c-T curves obtained,there is no peak for solid-liquid phase transitionof the adsorbed *** for HO-NaY zeolite system which consists of a saturated HO/NaYadsorption system mixed mechanically with a certain amount of water,there are distinct peaks intheir *** peak in the c-Tcurve disappeared as soon as the mixed water in the lattersystem was *** facts mentioned above have been discussed from the point of view ofthe structure of the adsorbed layer and the pore size of zeolite.

关键词： NaY Thermochemistry study on H2O/NaY zeolite adsorption system

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隧道围岩稳定分析的最小安全系数法

岩土力学 2007年第3期28卷 549-554页

作者：李树忱李术才徐帮树山东大学土建与水利学院城市地下空间系济南250061

关于岩体稳定评判准则至今尚未达到成熟的阶段,从稳定的定义至量化的标准等一系列基本问题尚未形成明确的体系。目前主要利用塑性区或位移扰动区来判断围岩的稳定范围。根据弹性理论,借助工程中安全系数的概念,利用Mohr-Coulomb和Drucke... 详细信息

关于岩体稳定评判准则至今尚未达到成熟的阶段,从稳定的定义至量化的标准等一系列基本问题尚未形成明确的体系。目前主要利用塑性区或位移扰动区来判断围岩的稳定范围。根据弹性理论,借助工程中安全系数的概念,利用Mohr-Coulomb和Drucker-Prager强度准则,建立基于单元的安全系数法,通过FLAC3D中的FISH语言实现了其求解过程。通过求解围岩稳定的安全系数,建立了评价围岩稳定的量化指标,给出了围岩稳定的安全范围,为锚固支护提供合理的支护参数。

关键词：隧道安全系数围岩稳定 FLAC^3D FISH语言

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海底隧道衬砌结构选型及参数优化研究

岩石力学与工程学报 2005年第21期24卷 3894-3902页

作者：李术才徐帮树李树忱山东大学岩土与结构工程研究中心山东济南250012 华东师范大学地理信息科学教育部重点实验室上海200062

海底隧道不同于陆上隧道,海水位变化相对隧道埋深较小,隧道两端出口比海底部分要高,不能采用自然排水。深埋海底隧道二次衬砌承受较大的外水压力。调查了国内外海底隧道衬砌结构型状及支护参数,针对海底隧道的特殊性,归纳了海底隧道设... 详细信息

海底隧道不同于陆上隧道,海水位变化相对隧道埋深较小,隧道两端出口比海底部分要高,不能采用自然排水。深埋海底隧道二次衬砌承受较大的外水压力。调查了国内外海底隧道衬砌结构型状及支护参数,针对海底隧道的特殊性,归纳了海底隧道设计理念和设计方法。针对某公路海底隧道特定地质条件和工程设计要求,分别采用马蹄形、椭圆形、圆形3种衬砌结构型式,并用有限元软件对这3种衬砌结构二次衬砌在不同荷载作用下进行强度验算。对计算结果优化比选,选出一种技术可行、经济合理的衬砌结构,得出一些有意义的结论。

关键词：隧道工程海底隧道衬砌结构型式工程类比荷载结构法