检索结果-南通市图书馆

Facile Preparation of Electromagnetic Interference Shielding Materials Enabled by Constructing Interconnected Network of Multi-walled Carbon Nanotubes in a Miscible Polymeric Blend

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2020年第6期38卷 593-598页

作者： qi-yan zhang Han-Song Li Bao-Hua Guo Zhao-Xia Guo Jian Yu Key Laboratory of Advanced Materials(Ministry of Education) Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Electromagnetic interference(EMI)shielding materials are in great demand in electronic equipment and our surrounding environment to resist the increasing serious radiation *** with their metal counterparts,conductive polymer composites(CPCs)have unique advantages of lightweight,corrosive resistance,low cost,and excellent processability,and are therefore an ideal choice for developing high-performance EMI shielding ***,CPCs based EMI shielding materials are limited to high filler loading,which caused poor mechanical properties and ***,we demonstrate a facile and highly scalable approach to develop high-performance EMI shielding materials with low filler loading by using miscible poly(phenylene oxide)/polystyrene(PPO/PS)blend as the *** contrast to PS/carbon nanotubes(CNTs)composites,PPO/PS/CNTs composites show much higher EMI shielding effectiveness caused by good dispersion of CNTs and highly interconnected conductive *** excellent EMI shieling effectiveness of 23-25 dB is achieved for PPO/PS/10%CNTs composites with a thickness of only 375 pm;which is superior to most of reported polymer/CNTs composites prepared by *** addition,the results show that although absorption is the major shielding mechanism,the contribution of reflection is also important and closely related to the connectivity of conductive network,as well as the electrical conductivity of the CPCs.

关键词： Conductive polymer composites Polymer blend Electromagnetic interference shielding Conductive network Dispersion

Gastroduodenal artery disconnection during liver transplantation decreases non-anastomotic stricture incidence

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2023年第1期22卷 28-33页

作者： Bi Pan Wei Liu yan-Jiao Ou yan-qi zhang Di Jiang Yuan-Cheng Li Zhi-Yu Chen Lei-Da zhang Cheng-Cheng zhang Department of Hepatobiliary Surgery Southwest HospitalThird Military Medical University(Army Medical University)Chongqing 400038China Department of Health Statistics College of Military Preventive MedicineThird Military Medical University(Army Medical University)Chongqing 400038China

Background:The hepatic artery is the only blood source nourishing the biliary duct and associated with biliary complication after liver transplantation(LT).Gastroduodenal artery(GDA)disconnection increased proper hepatic artery *** this procedure attenuates biliary non-anastomotic stricture(NAS)is not ***:A total of 241 patients with LT were retrospectively *** patients were divided into the GDA disconnection(GDA-)and GDA preservation(GDA+)*** score matching(PSM)was administrated to reduce *** regression was conducted to analyze risk factors for biliary NAS before and after *** complications were ***-Meier survival analysis and log-rank tests were performed to compare overall ***:In all,99 patients(41.1%)underwent GDA disconnection,and 49(20.3%)developed *** logistic regression revealed that GDA preservation(OR=2.24,95%CI:1.11-4.53;P=0.025)and model for end-stage liver disease(MELD)score>15(OR=2.14,95%CI:1.12-4.11;P=0.022)were risk factors for biliary *** provided 66 pairs using 1:2 matching method,including 66 GDA disconnection and 99 GDA preservation *** logistic regression after PSM also showed that GDA preservation(OR=3.15,95%CI:1.26-7.89;P=0.014)and MELD score>15(OR=2.41,95%CI:1.08-5.36;P=0.031)were risk factors for *** comparing complications between the two groups,GDA preservation was associated with a higher incidence of biliary NAS before and after PSM(P=0.031 and 0.017,respectively).In contrast,other complications including early allograft dysfunction(P=0.620),small-for-size graft syndrome(P=0.441),abdominal hemorrhage(P=1.000),major complications(Clavien-Dindo grade≥3,P=0.318),and overall survival(P=0.088)were not significantly different between the two ***:GDA disconnection during LT ameliorates biliary NAS incidence and may be recommended for application in clinical practice.

关键词： Liver transplantation Biliary complication Gastroduodenal artery disconnection Hepatic artery hyperperfusion

Boosting lithium storage performance of Si nanoparticles via thin carbon and nitrogen/phosphorus co-doped two-dimensional carbon sheet dual encapsulation

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第6期40卷 1347-1356页

作者： Cheng-Zhi Ke Fang Liu Zhi-Ming Zheng He-He zhang Meng-Ting Cai Miao Li qi-zhang yan Hui-Xin Chen qiao-Bao zhang Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005China Department of Nanoengineering University of California San DiegoLa JollaCA 92093USA Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361021China

Silicon(Si)is a promising anode candidate for next-generation lithium-ion batteries(LIBs),but it suffers from poor electronic conductivity and dramatic volume variation during cycling,which poses a critical challenge for stable battery *** mitigate these issues simultaneously,we propose a"double carbon synergistic encapsulation"strategy,namely thin carbon shell and nitrogen/phosphorus co-doped two-dimensional(2D)carbon sheet dual encapsulate Si nanoparticles(denoted as 2D NPC/C@Si).This double carbon structure can serve as a conductive medium and buffer matrix to accommodate the volume expansion of Si nanoparticles and enable fast electron/ion transport,which promotes the formation of a stable solid electrolyte interphase film during *** structural advantages,the resulting 2 D NPC/C@Si electrode demonstrates a high reversible capacity of592 mAh·g^(-1) at 0.2 A·g^(-1) with 90.5%excellent capacity retention after 100 cycles,outstanding rate capability(148 mAh·g^(-1) at 8 A·g^(-1)),and superior long-term cycling stability(326 mAh·g^(-1) at 1 A·g^(-1) for 500 cycles,86%capacity retention).Our findings elucidate the development of high-performance Si@C composite anodes for advanced LTBs.

关键词： Silicon@carbon composites Anode Nitrogen/phosphorus co-doped carbon Lithium-ion battery

Panda Habitat Added to World Heritage List

在线全文

学校读者我要写书评

暂无评论

China & The World Cultural Exchange 2006年第9期72卷 25-27页

作者： qi Mei & zhang yan

“Bamboo has blossomed. Held in her mother’s arms, Mimi is counting the number of stars in the sky. How beautiful the stars are and where is my breakfast tomorrow... 详细信息

“Bamboo has blossomed. Held in her mother’s arms, Mimi is counting the number of stars in the sky. How beautiful the stars are and where is my breakfast tomorrow...

关键词：世界遗产目录大熊猫生活环境自然保护区栖息地

Postoperative morbidity adversely impacts oncological prognosis after curative resection for hilar cholangiocarcinoma

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第9期28卷 948-960页

作者： Zhi-Peng Liu Wei-Yue Chen yan-qi zhang yan Jiang Jie Bai Yu Pan Shi-Yun Zhong Yun-Ping Zhong Zhi-Yu Chen Hai-Su Dai Department of Hepatobiliary Surgery Southwest HospitalThird Military Medical University(Army Medical University)Chongqing 400038China Department of Clinical Center of Oncology Lishui Hospital of Zhejiang UniversityLishui 323000Zhejiang ProvinceChina Department of Health Statistics Third Military Medical University(Army Medical University)Chongqing 400038China

BACKGROUND Postoperative morbidity after curative resection for hilar cholangiocarcinoma(HCCA)is common;however,whether it has an impact on oncological prognosis is *** To evaluate the influence of postoperative morbidity on tumor recurrence and mortality after curative resection for *** Patients with recently diagnosed HCCA who had undergone curative resection between January 2010 and December 2017 at The First Affiliated Hospital of Army Medical University in China were *** independent risk factors for morbidity in the 30 d after surgery were investigated,and links between postoperative morbidity and patient characteristics and outcomes were *** morbidities were divided into five grades based on the Clavien-Dindo classification,and major morbidities were defined as Clavien-Dindo≥*** and multivariate Cox regression analyses were used to evaluate the risk factors for recurrence-free survival(RFS)and overall survival(OS).RESULTS Postoperative morbidity occurred in 146 out of 239 patients(61.1%).Multivariate logistic regression revealed that cirrhosis, intraoperative blood loss > 500 mL, diabetes mellitus,and obesity were independent risk factors. Postoperative morbidity was associated with decreasedOS and RFS (OS: 18.0 mo vs 31.0 mo, respectively, P = 0.003;RFS: 16.0 mo vs 26.0 mo, respectively,P = 0.002). Multivariate Cox regression analysis indicated that postoperative morbidity wasindependently associated with decreased OS [hazard ratios (HR): 1.557, 95% confidence interval(CI): 1.119-2.167, P = 0.009] and RFS (HR: 1.535, 95%CI: 1.117-2.108, P = 0.008). Moreover, majormorbidity was independently associated with decreased OS (HR: 2.175;95%CI: 1.470-3.216, P <0.001) and RFS (HR: 2.054;95%CI: 1.400-3.014, P < 0.001) after curative resection for *** morbidity (especially major morbidity) may be an independent risk factor forunfavorable prognosis in HCCA patients following curative resection

关键词： Hilar cholangiocarcinoma Morbidity Surgery Oncology Survival Recurrence

Computational studies of eletrochemical CO2 reduction on Cu4S cluser

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computational studies of eletrochemical CO2 reduction on Cu4...

Outcomes of primary percutaneous coronary intervention for acute ST-elevation myocardial infarction in patients aged over 75 years

第十三届全国量子化学会议

作者： qi-yan zhang Hai-yan Zhu Institute of Modern Northwest University

With the rapid development of the global economy,the environmental problems caused by CO have become the focus of attention[1].The electrochemical reduction of CO is widely concerned because of its high reduction efficiency at room temperature and atmospheric pressure,it also can reduce the activation energy during reduction[2].At present,liu et *** reduced CO to CH by electrochemical reduction on Cu cluster, but the reaction potential is higher and the reaction rate is slower[3].In order to overcome these problems, we through the method of modifying the electrode[4],doped with metal S on Cu metal cluster,and used toluene as solvention to conduct electrochemical reduction of *** results show that CuS clusters can reduce the potential barrier and increase the reaction *** product CH and little CHOH can be applied in real life, so it has very important practical significance.

关键词： CO2 electrochemical reduction Modified electrode

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Medical Journal 2006年第14期119卷 1151-1156页

作者： zhang qi zhang Rui-yan zhang Jian-sheng HU Jian yanG Zhen-kun ZHENG Ai-fang zhang Xian SHEN Wei-feng Department of Cardiology Shanghai Ruijin Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200025 China

Background The optimal reperfusion strategy in elderly patients with ST-elevation myocardial infarction （STEMI） remains unclear. The purpose of this study was to evaluate the safety, in-hospital and one-year clinical outcomes for patients 〉75 years of age with STEMI receiving primary percutaneous coronary intervention （PCI）, compared with those treated by conservative approach. Methods One hundred and two patients 〉75 years of age with STEMI presented 〈12 hours were randomly allocated to primary PCI （n=50） or conservative therapy only （n=52）. The baseline characteristics, in-hospital outcome and major adverse cardiac events （MACE）, including death, non-fatal myocardial infarction and target vessel revascularization at one-year clinical follow-up were compared between the two groups. Results Age, gender distribution, risk factors for coronary artery disease, infarct site and clinical functional status were similar between the two groups, but the patients in primary PCI group received less low-molecular- weight heparin during hospitalization. Compared with conservative group, the patients in primary PCI group had significantly lower occurrence rate of re-infarction and death and shortened hospital stay. The composite endpoint for in-hospital survivals at 30-day follow-up was similar between the two groups, but one-year MACE rate was significantly lower in the primary PCI group （21.3% and 45.2%, P=0.029）. Left ventricular ejection fraction was not significantly changed in both groups during follow-up. Multivariate analysis revealed that primary PCI （OR=0.34, 95% CI： 0.21-0.69, P =0.03） improved MACE-free survival rate for STEMI patients aged 〉 75 years. Conclusion Our results indicated that primary PCI was safe and effective in reducing in-hospital mortality and one-year MACE rate for elderly patients with STEMI.

关键词： myocardial infarction elderly angioplasty outcome

DISTRIBUTION OF MERCURY IN TYPICAL WETLAND PLANTS IN THE SANJIANG PLAIN

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2003年第3期13卷 242-246页

作者： LIU Ru-hai, WANG qi-chao, WANG yan, zhang Lei, SHAO Zhi-guo(Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China) Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences Changchun 130012 P. R. China

Total mercury concentration of typical wetland plants was analyzed in thispaper. There were great differences of total mercury concentration among different plants:moss>hydrophyte>sedge>herbage>shrub. Total mercury concentrations show an increasing trend fromvascular plants to bryophytes, and from dry to wet lands. The mercury concentration of wetlandplants was higher than that of crops. The wetland soil was the source of mercury in the air close tothe ground, so it affected the concentration of mercury in the plant. In different parts of aplant, mercury concentration was in the order of: dead stand>root>leaf>stem. Mercury concentrationincreased at the initial stage and decreased in the end of the growing season. According to themercury content and biomass, mercury stock of plants was 39.4μg/m^2 above ground in Calamagrostisangustifolia wetland and 35.8μg /m^2 in Carex lasiocarpa wetland.

关键词： wetland plant mercury the sanjiang plain

Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 26-38页

作者： Xiaodong yang Haochen Shen Xiaoming Xiao Zhichao Li qi Zhou Wei yang Bin Jiang Yongli Sun Luhong zhang Zhenhua yan School of Chemical Engineering and Technology Tianjin University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides （M/SLDH） through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction （OER） and hydrogen evolution reaction （HER） performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm-2in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm-2and exhibited high structural robustness,maintaining stability at 1000 mA cm-2for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy （UPS） and density functional theory （DFT） analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： Ultraviolet photoelectron spectroscopy