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Green Energy & Environment 2022年第6期7卷 1361-1376页

作者： Huanhuan Yang Liguo Wang Shuang Xu Yan Cao peng He Jiaqiang chen Zheng Zheng Huiquan Li Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China Chemical and Biochemical Engineering Technical University of DenmarkLyngby 2800 KgsDenmark Sino-Danish College University of Chinese Academy of SciencesBeijing100049China Sino-Danish Center for Education and Research University of Chinese Academy of SciencesBeijing100049China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China Dalian National Laboratory for Clean Energy Dalian116023China

In this study,nanosheet g-C_(3)N_(4)-H_(2) was prepared by thermal exfoliation of bulk g-C_(3)N_(4) under hydrogen.A series of Ru/g-C_(3)N_(4)-H_(2) catalysts with Ru species supported on the nanosheet g-C_(3)N_(4)-H_(2) were synthesized via ultrasonic assisted impregnation-deposition *** Ru nanoparticles(99%4,40-diaminodicyclohexylmethane selectivity,corresponding to a reaction activity of 35.7 mol_(MDA) mol_(Ru)^(-1) h^(-1).Moreover,the reaction activity of catalyst in the fifth run was 36.5 mol_(MDA) mol_(Ru)^(-1) h^(-1),which was comparable with that of the fresh *** computational results showed that g-C_(3)N_(4) as support was favorable for adsorption and dissociation of H_(2) ***,the substrate scope can be successfully expanded to a variety of other aromatic ***,this work provides an efficient and green catalyst system for selective hydrogenation of aromatic diamines.

关键词： Nanosheet carbon nitride Ultrafine Ru species Selective hydrogenation Aromatic diamine Alicyclic diamine

LXRα gene downregulation by lentiviral-based RNA interference enhances liver function after fatty liver transplantation in rats

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Hepatobiliary & Pancreatic Diseases International 2015年第4期14卷 386-393页

作者： Ying-peng Zhao Li Li Jing-Pan Ma Gang chen Jian-Hua Bai Department of Hepatobiliary and Transplantation Surgery Ganmei Affiliated Hospital Kunming Medical University

Steatotic liver grafts, although accepted, increase the risk of poor posttransplantation liver function. However, the growing demand for adequate donor organs has led to the increased use of so-called marginal grafts. Liver X receptor alpha （LXRα） is important in fatty acid metabolism and inter- related with the specific ischemia-reperfusion injury in fatty liver transplantation. This study aimed to investigate whether LXRa RNA interference （RNAi） could improve the organ func- tion of liver transplant recipients. METHODS： Fifty Sprague-Dawley rats were fed with a high-fat diet and 56% alcohol. The livers of these animals had greater than 60% macrovesicular steatosis and were used as liver do- nors. The experimental donors were treated with 7×10^7 TU LXRα-RNAi-LV of a mixture injection and control donors with negative control-LV vector injection into the portal vein 72 hours before the operation. The effects of LXRa-RNAi-LV were assessed by serum aminotransferases, histology, immunostain- ing, and protein levels. The transcription of LXRα mRNA was assessed by reverse transcription-polymerase chain reaction. RESULTS： Compared with controls, LXRa RNAi inhibited the expression of LXRα at the mRNA （0.53±0.03 vs 0.94±0.02, P〈0.05） and protein levels （0.51±0.08 vs 1.09±0.12, P〈0.05）. LXRa RNAi also decreased the expressions of sterol regula- tory element-binding protein lc （SREBP-Ic） and CD36. LXRa RNAi consequently reduced fatty acid accumulation in hepa- tocytes. Compared with control animals, LXRα RNAi-treated group had lower serum alanine aminotransferase, aspartate aminotransferase, interleukin-1β, and tumor necrosis factor- alpha levels and milder pathologic damages. TUNEL analysisrevealed a significant reduction of apoptosis in the livers of rats treated with LXRa-RNAi-LV, and overall survival as determined by the Kaplan-Meier method was improved among rats treated with LXRα-RNAi-LV （P〈0.05）. CONCLUSION： LXRa-RNAi-LV treatment significantly down- regulated LXRa expr

关键词： fatty liver liver transplantation LXRα RNA interference ischemia-reperfusion injury

Behavior of Element Vaporization and Composition Control of Fe-Ga Alloy during Vacuum Smelting

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Journal of Iron and Steel Research International 2015年第11期22卷 983-989页

作者： Jian-wu YAN Liang LUO A-fang peng chen-shu ZHANG Qing-hua CAO Jiangxi Province Key Laboratory of Precision Drive and Control Institute of Micro/Nano Actuation and Control Nanchang Institute of Technology School of Aeronautical Manufacturing Engineering Nanchang Hangkong University

Saturated vapor pressure, critical evaporation temperature and evaporation loss rate of Fe-Ga alloy were calculated under different conditions of Ga and Fe contents with activity coefficients. The relationship between the change of Ga content and melting time was determined. The results demonstrated that saturated vapor pressure of Ga was higher than that of Fe under the same conditions. The difference value of critical evaporation temperature of Ga with and without Ar was nearly 800 K. The critical evaporation temperature of Fe was higher than that of Ga under vacuum, indicating that Ga was more volatile than Fe. At 1800 K, the evaporation rate of Ga was 84 times higher than that of Fe in the melt of Fe81Ga19 alloy. Under this condition, the change of Ga content and smelting time kept a linear relationship. The higher the temperature was, the faster the Ga content decreased, which was consistent with theoretical calculations.

关键词： Fe-Ga alloy vacuum smelting critical evaporation temperature saturated vapor pressure smelting time

High-entropy(Nd_(0.2)Sm_(0.2)Eu_(0.2)Y_(0.2)Yb_(0.2))_(4)Al_(2)O_(9) with good high temperature stability,low thermal conductivity,and anisotropic thermal expansivity

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Journal of Advanced Ceramics 2020年第5期9卷 595-605页

作者： Zifan ZHAO Huimin XIANG Heng chen Fu-Zhi DAI Xiaohui WANG Zhijian peng Yanchun ZHOU Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China School of Engineering and Technology China University of GeosciencesBeijing 100083China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The critical requirements for the environmental barrier coating(EBC)materials of silicon-based ceramic matrix composites(CMCs)include good tolerance to harsh environments,thermal expansion matches with the interlayer mullite,good high-temperature phase stability,and low thermal ***-structured rare-earth aluminates RE_(4)Al_(2)O_(9) have been considered as candidates of EBCs for their superior mechanical and thermal properties,but the phase transition at high temperatures is a notable drawback of these *** suppress the phase transition and improve the phase stability,a novel cuspidine-structured rare-earth aluminate solid solution(Nd_(0.2)Sm_(0.2)Eu_(0.2)Y_(0.2)Yb_(0.2))_(4)Al_(2)O_(9) was designed and successfully synthesized inspired by entropy stabilization effect of high-entropy ceramics(HECs).The as-synthesized HE(Nd_(0.2)Sm_(0.2)Eu_(0.2)Y_(0.2)Yb_(0.2))_(4)Al_(2)O_(9) exhibits a close thermal expansion coefficient(6.96×10^(-6) K^(-1) at 300-1473 K)to that of mullite,good phase stability from 300 to 1473 K,and low thermal conductivity(1.50 W·m^(-1)·K^(-1) at room temperature).In addition,strong anisotropic thermal expansion has been observed compared to Y_(4)Al_(2)O_(9) and Yb_(4)Al_(2)O_(9).The mechanism for low thermal conductivity is attributed to the lattice distortion and mass difference of the constituent atoms,and the anisotropic thermal expansion is due to the anisotropic chemical bonding enhanced by the large size rare-earth cations.

关键词： (Nd_(0.2)Sm_(0.2)Eu_(0.2)Y_(0.2)Yb_(0.2))_(4)Al_(2)O_(9) high-entropy ceramics(HECs) environmental barrier coatings phase stability thermal properties

Gene expression in rats with Barrett's esophagus and esophageal adenocarcinoma induced by gastroduodenoesophageal reflux

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World Journal of Gastroenterology 2005年第33期11卷 5117-5122页

作者： peng cheng Jun Gong Tao Wang Jie chen Gui-Sheng Liu Ru Zhang Department of Gastroenterology the Second HospitalXi'an Jiaotong University Xi'an 710004 Shaanxi Province China

AIM: To study the different gene expression profiles in rats with Barrett's esophagus (BE) and esophageal adenocarcinoma (EA) induced by gastro-duodenoesophageal ***: Esophagoduodenostomy was performed in 8-wk old Sprague-Dawley rats to induce gastro-duodenoesophageal reflux, and a group of rats that received sham operation served as control. Esophageal epithelial pathological tissues were dissected and frozen in liquid nitrogen immediately. The expression profiles of 4 096genes in EA and BE tissues were compared to normal esophagus epithelium in normal control (NC) by cDNA ***: Four hundred and forty-eight genes in BE were more than three times different from those in NC, including 312 upregulated and 136 downregulated genes. Three hundred and seventy-seven genes in EA were more than three times different from those in NC, including 255upregulated and 142 downregulated genes. Compared to BE, there were 122 upregulated and 156 downregulated genes in EA. In the present study, the interested genes were those involved in carcinogenesis. Among them, the upregulated genes included cathepsin C, aminopeptidase M, arachidonic acid epoxygenase, tryptophan-2,3-dioxygenase, ubiquitin-conjugating enzyme, cyclic GMP-stimulated phosphodiesterase, tissue inhibitor of metalloproteinase-1, betaine-homocysteine methyltransferase, lysozyme, complement 4b binding protein,complement 9 protein, insulin-like growth factor binding protein, UDP-glucuronosyltransferase, tissue inhibitor of metalloproteinase-3, aldolase B, retinoid X receptor gamma, carboxylesterase and testicular cell adhesion molecule 1. The downregulated genes included glutathione synthetase, lecithin-cholesterol acyltransferase, p55CDC,heart fatty acid binding protein, cell adhesion regulator and endothelial cell selectin ***: Esophageal epithelium exposed excessively to harmful ingredients of duodenal and gastric reflux may develop into BE and even EA gradually. The gene expression

关键词： Gastroduodenoesophageal reflux Barrett'sesophagus Esophageal adenocarcinoma Gene expression

Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries

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Nano-Micro Letters 2022年第1期14卷 182-193页

作者： Min Wan Rui Zeng Jingtao Meng Zexiao cheng Weilun chen Jiayu peng Wuxing Zhang Yunhui Huang School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Chemistry and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023People’s Republic of China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China

Iron hexacyanoferrate(FeHCF)is a promising cathode material for sodium-ion ***,FeHCF always suffers from a poor cycling stability,which is closely related to the abundant vacancy defects in its ***,post-synthetic and in-situ vacancy repairing strategies are proposed for the synthesis of highquality FeHCF in a highly concentrated Na_(4)Fe(CN)_(6) *** the post-synthetic and in-situ vacancy repaired FeHCF products(FeHCF-P and FeHCF-I)show the significant decrease in the number of vacancy defects and the reinforced structure,which can suppress the side reactions and activate the capacity from low-spin Fe in *** particular,FeHCF-P delivers a reversible discharge capacity of 131 mAh g^(−1) at 1 C and remains 109 mAh g^(−1) after 500 cycles,with a capacity retention of 83%.FeHCF-I can deliver a high discharge capacity of 158.5 mAh g^(−1) at 1 *** at 10 C,the FeHCF-I electrode still maintains a discharge specific capacity of 103 mAh g^(−1) and retains 75% after 800 *** work provides a new vacancy repairing strategy for the solution synthesis of high-quality FeHCF.

关键词： Iron hexacyanoferrate Cathode Vacancy repairing Sodium-ion batteries

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癌症晚期患者质量调整生命年的测量方法研究

现代预防医学 2024年第6期51卷 994-997+1004页

作者：林萍陈慧平彭伟贾艳皊杨青韩佳禹吴皓四川大学华西公共卫生学院/四川大学华西第四医院四川省肿瘤医院四川省成都市龙泉驿区妇幼保健院四川省妇幼保健院·成都医学院附属妇女儿童医院

目的研究癌症晚期患者质量调整生命年的测量方法，为该人群姑息关怀服务评价提供依据。方法通过专家咨询法对量表中各项指标的重要性进行比较，并采用层次分析法得到各指标的权重。结果量表中一级指标权重由高到低分别是躯体症状、... 详细信息

目的研究癌症晚期患者质量调整生命年的测量方法，为该人群姑息关怀服务评价提供依据。方法通过专家咨询法对量表中各项指标的重要性进行比较，并采用层次分析法得到各指标的权重。结果量表中一级指标权重由高到低分别是躯体症状、精神心理、社会关系；躯体症状的二级指标权重由高到低排序分别是疼痛、治疗的副作用、睡眠、日常生活、食欲、疲乏、面部表情；精神心理的二级指标权重由高到低排序分别是自身对疾病的认知、对治疗的态度、精神；社会关系的二级指标权重由高到低排序分别是家庭的照顾与理解、同事的理解与配合。结论通过层次分析法得到生命质量量表各指标的权重，可将不同生命质量下的生存时间换算为质量调整生命年，为后续研究姑息关怀服务对癌症晚期患者质量调整生命年的影响的评价提供了工具。

关键词：姑息关怀癌症晚期质量调整生命年测量方法

Effect of brain-derived neurotrophic factor on c-jun expression in the rd mouse retina

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International Journal of Ophthalmology(English edition) 2012年第3期5卷 266-271页

作者： Rui chen Xiao-Bei Yin Chun-Xia peng and Gen-Lin Li Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing Key Laboratory of Ophthalmology and Visual Sciences Beijing 100730 China

AIM: To determine the location of c-jun protein, dynamic changes in c-jun mRNA and protein expression, and ultrastructure characteristics in the rd mouse retina, following a single dose of brain-derived neurotrophic factor (BDNF) in a short period of time. METHODS: A single intravitreal injection of BDNF at two dosages (25 mu g/L or 50 mu g/L) was given to the right eye of the rd mouse at age 2 and 3 weeks respectively. Two weeks after injection, the location of c-jun protein in the retina was observed by immunofluorescence detection, c-jun mRNA and protein expression in retinas were detected by quantitative real time polymerase chain reaction (RT-PCR) and western immunoblotting analysis, ultrastructure characteristics of retinas were detected by transmission electron microscope (TEM) observation. RESULTS: c-jun protein was expressed in the inner nuclear layer (INL) of retina. BDNF at two dosages (25 mu g/L and 50 mu g/L) increased c-jun mRNA expression at PN-4 weeks respectively (P-1 =0.019, P-2=0.021). 50 mu g/L BDNF increased c-jun protein expression at PN-4 weeks (P =0.000). The retinal ultrastructure was improved. CONCLUSION: The effects of BDNF exerts on the c-jun expression in the retina are dose-dependent and time-dependent, which may mediate photoreceptor rescue indirectly in the pathological process of retinitis pigmentosa (RP)at early stage.

关键词： BDNF c-jun retina photoreceptor

Organic white-light sources:Multiscale construction of organic luminescent materials from molecular to macroscopic level

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Science China Chemistry 2022年第4期65卷 740-745页

作者： Song chen Xue-Dong Wang Ming-peng Zhuo Qiang Lv Jing-Feng Liu Liang-Sheng Liao Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipa 999078China

Organic luminescent materials play an integral role in the optoelectronic applications of displays and solid-state ***, high-performance organic luminescent materials require the efficient combination of two or more kinds of materials, which is extremely difficult owing to the completely different self-assembly behaviors of multicomponent ***, based on a broad scale from the molecular, micro-/nano-scale, and macroscopic levels, we successfully demonstrate the multiscale construction of organic luminescent microwires of cocrystals, solid solutions, and core-shell microstructures. Through the wide selection of electron donor/acceptor pairs, a series of color-tunable charge-transfer(CT) cocrystals are formed via the intermolecular cooperative self-assembly process. On this basis, the high structural compatibility and perfect lattice mismatching(~1.1%) of cocrystals are critical factors that facilitate the combination of dissimilar materials to form solid solutions and core/shell microwires. Significantly, because of the full-spectrum light transport from 400 to 800 nm, the nano-micro-scaled solid solution microwires act as microscale white-light sources [CIE(0.32, 0.36)]. Meanwhile, the macroscopic-scale core/shell organic-microwires demonstrate tunable white-light emission with a high color-rendering index(CRI) of 83, whose CIE coordinates span from(0.37, 0.39) to(0.40, 0.31). Therefore, our work provides a feasible approach to the multiscale synthesis of novel luminescent organic semiconductor materials, which could lay a solid foundation for organic optoelectronics.

关键词： noncovalent interaction multiscale self-assembly core/shell solid solution white-light emission

An Integrable Bose Fermion Model

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Chinese Physics Letters 1999年第11期16卷 787-789页

作者： YANG Fan WANG Yu-peng chen Shu PU Fu-ke Institute of Physics and Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080 Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080 Theoretishe Physik II Universität Augsburg 86135AugsburgGermany Department of Physics Guangzhou Normal CollegeGuangzhou 510400

In this paper, we derive the higher order Hamiltonian of the three-wave interaction fermion model II by the Neumann expansion and find it physically interesting as related to the pairing process of the high Tc super-c... 详细信息

关键词： method Fermi inverse