检索结果-南通市图书馆

典型冶炼厂大气沉降区农田耕层土壤重金属(Cd、Cu、Pb)输入输出平衡研究

在线全文

学校读者我要写书评

暂无评论

土壤学报 2024年第5期61卷 1339-1348页

作者：米雅竹梁家妮周俊刘梦丽寇乐勇夏睿智田瑞云施颖舒天才舒伍星周静中国科学院南京土壤研究所南京211135 中国科学院土壤环境与污染修复重点实验室南京211135 国家红壤改良工程技术研究中心中国科学院红壤生态实验站江西鹰潭335211 鹰潭市农业农村粮食局江西鹰潭335001 鹰潭市余江区农业农村粮食局江西鹰潭335211

为探究不同大气沉降区农田耕层土壤镉(Cd)、铜(Cu)、铅(Pb)的质量平衡特征,以距离贵溪冶炼厂34 km(背景区)、6 km(中沉降区)、1 km(高沉降区)的0~20 cm农田耕层土壤为研究对象,通过化学质量平衡方法对土壤重金属的主要输入途径(大气沉... 详细信息

为探究不同大气沉降区农田耕层土壤镉(Cd)、铜(Cu)、铅(Pb)的质量平衡特征,以距离贵溪冶炼厂34 km(背景区)、6 km(中沉降区)、1 km(高沉降区)的0~20 cm农田耕层土壤为研究对象,通过化学质量平衡方法对土壤重金属的主要输入途径(大气沉降、灌溉水、农药肥料)和输出途径(地表径流、土壤淋溶、籽粒带走)开展为期三年的监测与定量分析。结果表明:背景区、中沉降区、高沉降区由大气沉降导致的Cd年均输入通量分别为0.84、2.26、9.01 mg·m^(-2)·a^(-1),分别占比43.18%、38.33%、100%;Cu年均输入通量分别为17.62、99.68、747.6 mg·m^(-2)·a^(-1),分别占比80.76%、86.24%、100%;Pb年均输入通量分别为13.93、27.43、73.17 mg·m^(-2)·a^(-1),分别占比97.75%、92.36%、100%。背景区和中沉降区由灌溉水导致的Cd年均输入通量分别为1.05、3.60 mg·m^(-2)·a^(-1),分别占比54.62%和60.82%;农药肥料带入的重金属年均输入量占比小于5%,可忽略不计。不同沉降区土壤的主要输出途径均为地表径流和土壤淋溶,输出占比介于86.66%~100%;籽粒带走的重金属输出占比介于2.88%~13.34%。2019—2021年,背景区、中沉降区、高沉降区土壤Cd、Cu、Pb的年均净输入通量均大于0,Cd年均净输入通量分别为1.54、1.96、4.38 mg·m^(-2)·a^(-1);Cu年均净输入通量分别为12.72、28.02、184.0 mg·m^(-2)·a^(-1);Pb年均净输入通量分别为13.03、21.31、55.04 mg·m^(-2)·a^(-1)。综上,建议加强研究区域大气污染源和灌溉水质的长期监测并采取一定的控制措施,同时避免秸秆直接还田。本研究可为区域农田环境质量保护及重金属污染修复治理提供理论支持。

关键词：重金属大气沉降灌溉水水稻输入输出

Effects of rh BNP after PCI on non-invasive hemodynamic in acute myocardial infarction patients with left heart failure

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2016年第8期9卷 769-773页

作者： Xi-Min He Lin Chen Jiang-Bin luo Xu-xia Feng Yun-Bo Zhang Qi-Jing Chen xiao-Li Ji Tian-Song Wang Department of Cardiology People's Hospital of Sanya

Objective: To investigate the effects of exogenous recombinant human brain natriuretic peptide(rh BNP) after primary percutaneous coronary intervention(PCI) on non-invasive hemodynamic in acute myocardial infarction patients with left ventricular failure. Methods: A number of 96 acute myocardial infarction patients accompanied with heart failure after PCI hospitalized in the People's Hospital of Sanya during February 2012 to October 2015 were selected. They were randomly divided into the therapy group(n = 50) and control group(n = 46). On the basis of routine treatment, patients in the therapy group were treated with intravenous rh BNP(1.5 μg/kg was intravenous injection with uniform speed of 3 min, followed by continuous infusion 0.007 5 μg/kg·min for 72 h), while the control group received conventional treatment. Bio Z-2011 non-invasive hemodynamic real-time monitoring system was used to monitor the hemodynamic parameters changes and the leves of plasma pro-BNP, serum creatinine, serum potassium, serum sodium and urine volume of each group before and after treating for 30 min, 1 h, 3 h, 6 h, 12 h, 24 h, 48 h, 72 h. Results: Patients in the therapy group showed no effect on heart rate, while after 30 min of intravenous injection of rh BNP, CO, CI, SV, and SI increased significantly and LVET and TFC reduced at the same time, which had certain effect on blood pressure(SBP/DBP). Compared with the control group, the therapy group showed a faster and more effective improvement on haemodynamics. Conclusions: Acute myocardial infarction patients complicated with left heart failure after primary PCI can significantly improve hemodynamics by treating with rh BNP.

关键词： rhBNP Non-invasive hemodynamics Acute myocardial infarction Heart failure

Expressions of Nucleoside Diphosphate Kinase (nm23) in Tumor Tissues are Related with Metastasis and Length of Survival of Patients with Hepatocellular Carcinoma

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

Biomedical and Environmental Sciences 2010年第4期23卷 267-272页

作者： RUN AN JIE MENG QI SHI xiaO-xia DAI JING-HONG CHEN YAN-jun LEI BING SHAN CHEN GAO YONG-LIE CHU xiaO-PING DONG School of Medicine Xi'an Jiao-Tong University Xi'an 710061 Shanxi China State Key Laboratory for Infectious Disease Prevention and Control National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and Prevention Ying-Xin Rd 100 Beijing 100052 China

Objective To evaluate the relationship of expressions of nucleoside diphosphate kinase （nm23） and proliferating cell nuclear antigen （PCNA）, as well as apoptosis, with the prognosis of HCC patients by analyzing their pathological and clinical data. Methods The expressions of nm23 and PCNA were analyzed by immunohistochemistry and the apoptotic phenomena were detected by TUNEL technique in the liver samples from 43 HCC tissues, 39 para-neoplastic tissues, and 10 normal tissues. The mean apoptosis index （AI） and proliferative index （PI） in individual sample were calculated. Results As shown by the detection, 32.6% of carcinomas had negative nm23 signal in tumor tissues, whereas all para-neoplastic and normal tissues had positive nm23. The AI in nm23 positive HCC was significantly higher than that in nm23 negative one, with statistical difference （P0.05）. Furthermore, the expressions of nm23, and the values of AI and PI were contrastively analyzed with some main pathological and clinical data of HCC. It revealed that HCC with extrahepatic metastasis showed remarkable correlation with the negative nm23 （P=0.013） and higher PI values of HCC （P=0.015）. The disease-free survival in HCC patients with negative nm23 expression was significantly poorer than that in patients with positive nm23 expression. Conclusion These data suggest that expressions of nm23 protein in tumor tissues are correlated with occurrences of metastasis and length of survival of the HCC patients, which may be an indicator for their prognosis.

关键词： Hepatocellular carcinoma nm23 PCNA Apoptosis Prognosis

A New Test for Large Dimensional Regression Coefficients

在线全文

学校读者我要写书评

暂无评论

Open Journal of Statistics 2011年第3期1卷 212-216页

作者： june luo Yi-jun Zuo 不详

In the article, hypothesis test for coefficients in high dimensional regression models is considered. I develop simultaneous test statistic for the hypothesis test in both linear and partial linear models. The derived test is designed for growing p and fixed n where the conventional F-test is no longer appropriate. The asymptotic distribution of the proposed test statistic under the null hypothesis is obtained.

关键词： High Dimension Ridge Regression Hypothesis Test Partial Linear Model Asymptotic

沉淀法合成t-LaVO_4∶Eu^(3+)及其光致发光性质研究

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

无机化学学报 2009年第6期25卷 1038-1044页

作者：罗红霞郭佳杨骏张渊明暨南大学化学系广州510632

用沉淀法在不同pH值下选择性合成了m-和t-LaVO4∶Eu3+,合成过程未使用添加剂。用XRD、SEM、PL对样品进行了表征,并与水热法所制备样品的性质进行了比较。结果表明,样品在280nm紫外光激发下能发射600～620nm窄带红光,t-LaVO4∶Eu3+发光... 详细信息

用沉淀法在不同pH值下选择性合成了m-和t-LaVO4∶Eu3+,合成过程未使用添加剂。用XRD、SEM、PL对样品进行了表征,并与水热法所制备样品的性质进行了比较。结果表明,样品在280nm紫外光激发下能发射600～620nm窄带红光,t-LaVO4∶Eu3+发光性能远比m-LaVO4∶Eu3+优越;pH值是选择性合成t-LaVO4∶Eu3+的关键,pH值在6～9范围内,沉淀法与水热法都可得到t-LaVO4∶Eu3+,其中pH值为7时样品发光强度最高。样品形貌对光致发光性质有重要影响,沉淀法所得到的t-LaVO4∶Eu3+具有规则的形貌,尺寸为亚微米级。延长陈化时间可增强样品发光强度,常温下陈化12h所得样品的发光强度与180℃水热2h样品相近。Eu3+掺杂量也是影响样品发光性质重要因素,其最佳掺杂浓度为物质的量分数5%。t-LaVO4∶Eu3+在600℃以下结构稳定,煅烧后样品发光强度不会下降。

关键词： t-LaVO4∶Eu3+ 沉淀法光致发光

服务设计视角下夏布绣文创产品设计的多维创新

在线全文

学校读者我要写书评

暂无评论

包装工程 2024年第2期45卷 406-416,431页

作者：肖代柏罗坤明吴婉菁宋佳鑫澳门城市大学人文社会科学学院中国澳门999078 江西旅游商贸职业学院艺术传媒与计算机学院南昌330100 江西渝州绣坊有限公司江西新余338000 南昌大学建筑与设计学院南昌330000

目的非遗文化是中国传统文化的重要组成部分,夏布绣非遗作为一种民间技艺是国家级非物质文化遗产,探索在服务设计视角下夏布绣文创产品设计的创新设计思路,以实现夏布绣非遗在当代的价值转化。方法通过剖析夏布绣非遗文创产品的市场现... 详细信息

目的非遗文化是中国传统文化的重要组成部分,夏布绣非遗作为一种民间技艺是国家级非物质文化遗产,探索在服务设计视角下夏布绣文创产品设计的创新设计思路,以实现夏布绣非遗在当代的价值转化。方法通过剖析夏布绣非遗文创产品的市场现状,总结夏布绣非遗文创产业的现实问题。运用服务设计理念,以用户为中心、以用户需求为导向,并基于Kano模型对用户需求属性进行分类,使用层次分析法拆解量化夏布绣文创产品的用户体验需求。结论根据用户体验需求权重,结合服务设计思维提出提升产品视觉形象和功能创新、突出文化特色、注重文化消费体验、遵循市场逻辑,以建立产品服务系统的夏布绣非遗文创产品多维创新路径。

关键词：服务设计夏布绣文创产品体验需求创新设计

Tuning dual three-dimensional porous copper/graphite composite to achieve diversified utilization of copper current collector for lithium storage

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第10期40卷 2802-2809页

作者： xia Ma Zhi-Jia Zhang Jia-Min Wang Shi-Hao Sun Shao-Fei Zhang Shen Yuan Zhi-jun Qiao Zhen-Yang Yu Jian-Li Kang Wei-Jie Li State Key Laboratory of Separation Membrane and Membrane Processes Tianjin Municipal Key Laboratory of Advanced Fibers and Energy StorageSchool of Materials Science and EngineeringSchool of Mechanical EngineeringTiangong UniversityTianjin 300387China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China School of Materials Science and Engineering Hebei Key Laboratory of Material Near-Net Forming TechnologyHebei University of Science&TechnologyShijiazhuang 050018China Institute for Superconducting and Electronic Materials University of WollongongWollongongNSW 2522Australia

Graphite anode materials are widely used in commercial lithium-ion batteries;however, the long electron/ion transportation path restricted its high energy storage. In this experiment, we designed a copper/graphite composite with a dual three-dimensional(3 D) continuous porous structure combining used nonsolvent-induced phase separation and heat treatment, in which a large amount of graphite is embedded in the 3 D porous copper/carbon architecture. In the novel structure, not only the electron and Li^(+) transmission performances are improved, but also the space of current collector is fully utilized. Meanwhile,carbonized polyacrylonitrile network stabilizes the interface between graphite and copper matrix. The obtained copper/graphite composite anode has an initial discharge capacity of 524.6 mAh·g^(-1), a holding capacity of350 mAh·g^(-1) and excellent cycle stability(299.3 mAh·g^(-1) after 180 cycles at 0.1 C rate), exhibiting good electrochemical performance. The experimental results show that the mass loading of the copper/graphite composite electrode material is about 4.39 mg·cm^(-2). We also envisage replacing graphite with other high-capacity active materials to fill the current collector, which can provide a reference for the future development of next-generation advanced electrodes.

关键词： Graphite anode Copper current collector Dual three-dimensional porous Nonsolvent-induced phase separation Heat treatment

Recent advances in interfacial modification of zinc anode for aqueous rechargeable zinc ion batteries

在线全文

学校读者我要写书评

暂无评论

能源化学:英文版 2023年第8期83卷 287-303,I0009页

作者： Qing Wen Hao Fu Ru-de Cui He-Zhang Chen Rui-Han Ji Lin-Bo Tang Cheng Yan Jing Mao Ke-Hua Dai xia-Hui Zhang jun-Chao Zheng School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083HunanChina School of Chemistry and Chemical Engineering Hunan University of Science and TechnologyXiangtan 411201HunanChina School of Mechanical Medical and Process EngineeringQueensland University of TechnologyBrisbaneQueensland 4001Australia School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina College of Chemistry Tianjin Normal UniversityTianjin 300387China School of Mechanical and Materials Engineering Washington State UniversityPullman 99164WashingtonUnited States

To tackle energy crisis and achieve sustainable development, aqueous rechargeable zinc ion batteries have gained widespread attention in large-scale energy storage for their low cost, high safety, high theoretical capacity, and environmental compatibility in recent years. However, zinc anode in aqueous zinc ion batteries is still facing several challenges such as dendrite growth and side reactions(e.g., hydrogen evolution), which cause poor reversibility and the failure of batteries. To address these issues, interfacial modification of Zn anodes has received great attention by tuning the interaction between the anode and the electrolyte. Herein, we present recent advances in the interfacial modification of zinc anode in this review. Besides, the challenges of reported approaches of interfacial modification are also ***, we provide an outlook for the exploration of novel zinc anode for aqueous zinc ion *** hope that this review will be helpful in designing and fabricating dendrite-free and hydrogenevolution-free Zn anodes and promoting the practical application of aqueous rechargeable zinc ion batteries.

关键词： Zinc ion batteries Zinc anode Interfacial modification Functional coating

Quinoxaline-based Polymers with Asymmetric Aromatic Side Chain Enables 16.27% Efficiency for Organic Solar Cells

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2023年第7期41卷 1002-1010页

作者： Dong-Xu Li Shu-Fang Li Cheng-Long Wen Chao-Yuan Sun Chang-Zhou Shi Xin-Xin xia Xin-Hui Lu Li-Hui Jiang jun Yuan Ying-Ping Zou College of Chemistry and Chemical Engineering Central South UniversityChangsha410083China Department of Physics The Chinese University of Hong KongNew TerritoriesHong Kong999077China

In recent years, due to the rapid development of high-performance small molecule acceptor (SMA) materials, the researches on p-type electron donor materials for matching with current efficient SMAs have become important. By means of asymmetric strategies to optimize the energy levels and inter/intramolecular interactions of molecules, we designed and synthesized an asymmetric aromatic side chain quinoxaline-based polymer donor TPQ-0F. Meanwhile, we took advantage of F atom which could form noncovalent interaction and strong electron-withdrawing property, to obtain the optimized quinoxaline-based polymer donors TPQ-1F, TPQ-1Fi and TPQ-2F. Eventually, the binary device based on TPQ-2F achieved an efficient power conversion efficiency (PCE) of 16.27%, which attributed to balanced hole/electron mobilities, less charge carrier recombination, and more favorable aggregation morphology. Our work demonstrates the great potential of asymmetric aromatic side chain quinoxaline-based polymer donors on optimizing the morphology of blending films, improving inter/intramolecular interactions, and subtly tuning energy level, finally for more efficient organic solar cells.

关键词： Asymmetric aromatic side chain Quinoxaline-based polymer donor Fluorine substitution Binary device