检索结果-南通市图书馆

The determination of 52 elements in marine geological samples by an inductively coupled plasma optical emission spectrometry and an inductively coupled plasma mass spectrometry with a high-pressure closed digestion method

引用

Acta Oceanologica Sinica 2017年第1期36卷 109-117页

作者： GAO Jingjing LIU Jihua LI Xianguo YAN Quanshu WANG Xiaojing WANG Hongmin key laboratory of Marine chemistry Theory and Technology of Ministry of Education Ocean University of China key laboratory of Marine Sedimentary and Environmental Geology The First Institute of OceanographyState Oceanic Administration laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology

An improved analytical method to determine the content of 52 major, minor and trace elements in marine geological samples, using a HF-HCl-HNO_3 acid system with a high-pressure closed digestion method（HPCD）, is studied by an inductively coupled plasma optical emission spectrometry（ICP-OES） and an inductively coupled plasma mass spectrometry（ICP-MS）. The operating parameters of the instruments are optimized, and the optimal analytical parameters are determined. The influences of optical spectrum and mass spectrum interferences, digestion methods and acid systems on the analytical results are investigated. The optimal spectral lines and isotopes are chosen, and internal standard element of rhodium is selected to compensate for matrix effects and analytical signals drifting. Compared with the methods of an electric heating plate digestion and a microwave digestion, a high-pressure closed digestion method is optimized with less acid, complete digestion,less damage for digestion process. The marine geological samples are dissolved completely by a HF-HCl-HNO_3 system, the relative error（RE） for the analytical results are all less than 6.0%. The method detection limits are 2–40μg/g by the ICP-OES, and 6–80 ng/g by ICP-MS. The methods are used to determine the marine sediment reference materials（GBW07309, GBW07311, GBW07313）, rock reference materials（GBW07103, GBW07104,GBW07105）, and cobalt-rich crust reference materials（GBW07337, GBW07338, GBW07339）, the obtained analytical results are in agreement with the certified values, and both of the relative standard deviation（RSD） and the relative error（RE） are less than 6.0%. The analytical method meets the requirements for determining 52 elements contents of bulk marine geological samples.

关键词： marine geological sample high-pressure closed digestion method inductively coupled plasma optical emission spectrometry inductively coupled plasma mass spectrometry major element minor element trace element

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Detection of Lectins by Saccharide-gold Nanoparticle Conjugates

引用

Chemical Research in Chinese Universities 2012年第6期28卷 947-952页

作者： HOU Qiong WANG Jin-e LIU Xia LI Xiao-kun MA Li-na DUAN Wu-biao WANG Zhen-xin School of chemistry Heilongjiang University Harbin 150080 P. R. China State key laboratory of electroanalytical chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China School of sciences Beijing Jiaotong University Beijing 100044 P. R. China

A general functionalization strategy was reported,which enables one to conjugate saccharide（SA） on gold nanoparticle（GNP） surface without affecting SA ***,disulfide phenylboronic acid（Bor） functionalized GNPs（Bor@GNPs） were synthesized by the reaction of citrate stabilized GNPs of 13 nm in diameter with the mixture of Bor and pentapeptide（Cys-Ala-Leu-Asn-Asn,CALNN）.Subsequently,the SA-GNP conjugates（SA@GNPs） were prepared by coupling SA to the GNP surface via the reaction of phenylboronic acid（PBA） with the cis-diol configuration in *** interactions of three SA@GNPs with three lectins have been analyzed by UV-visible spectroscopic and transmission electronic microscopic（TEM） techniques,*** experimental results demonstrate that SA@GNPs can efficiently bind to lectins and show a great promise as optical probes for monitoring specific affinities of lectins for SA,and detecting lectins with high sensitivity.

关键词： Saccharide Gold nanoparticle Lectin Phenylboronic acid

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Atomic insights of electronic states engineering of GaN nanowires by Cu cation substitution for highly efficient lithium ion battery

引用

Journal of Energy chemistry 2022年第4期31卷 46-54页

作者： Zhenjiang Li Kesheng Gao Ying Han Shiqi Ding Yanglansen Cui Minmin Hu Jian Zhao Meng Zhang Alan Meng Jimmy Yun Zhiming Liu Da-Wei Wang Changlong Sun College of Materials science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina School of Chemical Engineering The University of New South WalesSydneyNSW 2052Australia Shandong Engineering laboratory for Preparation and Application of High-performance Carbon-Materials College of Electromechanical EngineeringQingdao University of Science and TechnologyQingdao 266061ShandongChina key laboratory of Optic-electric Sensing and analytical chemistry for Life science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina Qingdao International Academician Park Research institute QingdaoShandong 266000China School of Materials science and Engineering Beihang University100191 BeijingChina School of Materials science and Engineering Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Electronic engineering of gallium nitride(Ga N) is critical for enhancement of its electrode *** this work, copper(Cu) cation substituted Ga N(Cu-Ga N) nanowires were fabricated to understand the electronically engineered electrochemical performance for Li ion storage. Cu cation substitution was revealed at atomic level by combination of X-ray photoelectron spectroscopy(XPS), X-ray absorption fine structure(XAFS), density functional theory(DFT) simulation, and so forth. The Cu-Ga N electrode delivered high capacity of 813.2 m A h g^(-1) at 0.1 A g^(-1) after 200 cycles, increased by 66% relative to the unsubstituted Ga N electrode. After 2000 cycles at 10 A g^(-1),the reversible capacity was still maintained at326.7 m A h g^(-1). The DFT calculations revealed that Cu substitution introduced the impurity electronic states and efficient interatomic electron migration, which can enhance the charge transfer efficiency and reduce the Li ion adsorption energy on the Cu-Ga N electrode. The ex-situ SEM, TEM, HRTEM, and SAED analyses demonstrated the reversible intercalation Li ion storage mechanism and good structural stability. The concept of atomic-arrangement-assisted electronic engineering strategy is anticipated to open up opportunities for advanced energy storage applications.

关键词： Cu cation substitution Electronic states engineering GaN nanowires Lithium-ion batteries DFT

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Anti-diabetic potential of apigenin,luteolin,and baicalein via partially activating PI3K/Akt/GLUT-4 signaling pathways in insulin-resistant HepG2 cells

引用

Food science and Human Wellness 2023年第6期12卷 1991-2000页

作者： Lingchao Miao Haolin Zhang Meng Sam Cheong Ruting Zhong Paula Garcia-Oliveira Miguel A.Prieto Ka-Wing Cheng Mingfu Wang Hui Cao Shaoping Nie Jesus Simal-Gandara Wai San Cheang Jianbo Xiao institute of Chinese Medical sciences University of MacaoMacao 999078China Department of analytical chemistry and Food science Faculty of Food Science and TechnologyUniversity of Vigo-Ourense CampusOurense E-32004Spain institute for Advanced Study Shenzhen UniversityShenzhen 508060China School of Biological sciences The University of Hong KongHong Kong 999077China College of Food science and Technology Guangdong Ocean UniversityGuangdong Provincial Key Laboratory of Aquatic Product Processing and SafetyGuangdong Province Engineering Laboratory for Marine Biological ProductsGuangdong Provincial Engineering Technology Research Center of SeafoodKey Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education InstitutionZhanjiang 524088China State key laboratory of Food science and Technology China-Canada Joint Lab of Food Science and Technology(Nanchang)Nanchang UniversityNanchang 330047China International Research Center for Food Nutrition and Safety Jiangsu UniversityZhenjiang 212013China

Dietary flavonoids are abundant in natural plants and possess multiple pharmacological and nutritional *** this study,apigenin,luteolin,and baicalein were chosen to evaluate their anti-diabetic effect in high-glucose and dexamethasone induced insulin-resistant(IR)HepG2 *** flavonoids improves the glucose consumption and glycogen synthesis abilities in IR-HepG2 cells via activating glucose transporter protein 4(GLUT4)and phosphor-glycogen synthase kinase(GSK-3β).These fl avonoids signifi cantly inhibited the production of reactive oxygen species(ROS)and advanced glycation end-products(AGEs),which were closely related to the suppression of the phosphorylation form of NF-κB and *** expression levels of insulin receptor substrate-1(IRS-1),insulin receptor substrate-2(IRS-2)and phosphatidylinositol 3-kinase(PI3K)/protein kinase B(Akt)pathway in IR-HepG2 cells were all partially activated by the fl avonoids,with variable ***,the intracellular metabolic conditions of the fl avonoids were also evaluated.

关键词： Apigenin Luteolin Baicalein Insulin-resistant HepG2 cells Signaling pathway Reactive oxygen species(ROS) Advanced glycation end-products(AGEs) Glycogen synthase kinase(GSK-3β) Glucose transporter protein 4(GLUT4)

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A novel luminol-based chemiluminescence method for the determination of amikacin sulfate in serum by using trivalent copper-periodate complex

引用

Journal of Pharmaceutical Analysis 2013年第5期3卷 360-366页

作者： Yu-Fei Hu Gong-Ke Li Zhu-Jun Zhang School of chemistry and Chemical Engineering Sun Yat-sen University Department of chemistry Institute of Analytical Science Southwest University

A novel chemiluminescence （CL） reaction was based on the oxidizing reaction of luminol by the trivalent copper-periodate complex （Ks[Cu（HIO6）2], DPC） in alkaline medium. The CL intensity could be enhanced in the presence of amikacin sulfate （AKS）. A new CL method was developed for the determination of AKS by coupling with flow injection （FI） technology. Because of the distinctive oxidative effect of DPC, the luminol-based CL reaction could occur at a low concentration of 10-7 M. The relative CL intensity was proportional to the concentration of AKS in the range of 4.0 x 10-9-4.0 x 10-6 g/mL with the detection limit of 1.2 x 10-9 g/mL. The relative standard deviation was 2.1% for 8.0xl0-9g/mL AKS （n=9）. The proposed method was successfully applied to the direct determination of AKS at the level of ng/mL in serum samples. The recovery varied from 97.0% to 106.3%. A possible mechanism of the CL reaction was discussed in detail by relating to the CL kinetic characteristics and electrochemical activities of the oxidant DPC.

关键词： Amikacin sulfate Chemiluminescence K5 [Cu(HIO6)2 ] Flow injection Serum sample

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Regulating^(*)COOH intermediate via amino alkylation engineering for exceptionally effective photocatalytic CO_(2) reduction

引用

Journal of Energy chemistry 2024年第5期92卷 282-291页

作者： Chengcheng Chen Qiaoyu Zhang Fangting Liu Zhengguo Zhang Qiong Liu Xiaoming Fang key laboratory of Enhanced Heat Transfer and Energy Conservation The Ministry of EducationSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640GuangdongChina Guangdong provincial key laboratory of Chemical Measurement and Emergency Test Technology(China) Institute of AnalysisGuangdong Academy of Sciences(China National Analytical CenterGuangzhou)Guangzhou 510070GuangdongChina Guangdong Engineering Technology Research Center of Efficient Heat Storage and Application South China University of TechnologyGuangzhou 510640GuangdongChina Guangdong provincial key laboratory of Fuel Cell Technology South China University of TechnologyGuangzhou 510640GuangdongChina

Photocatalytic reduction of CO_(2) into fuel represents a promising approach for achieving carbon neutrality,while realizing high selectivity in this process is challenging due to uncontrollable reaction intermediate and retarded desorption of target *** the interface microenvironment of catalysts has been proposed as a strategy to exert a significant influence on reaction outcomes,yet it remains a significant *** this study,amino alkylation was successfully integrated into the melem unit of polymeric carbon nitrides(PCN),which could efficiently drive the photocatalytic CO_(2) *** characterization and theoretical calculations revealed that the introduction of amino alkylation lowers the energy barrier for CO_(2) reduction into^(*)COOH intermediate,transforming the adsorption of^(*)COOH intermediate from the endothermic to an exothermic ***,the as-prepared materials demonstrated outstanding performance in photocatalytic CO_(2) reduction,yielding CO_(2)at a rate of 152.8μmol h^(-1) with a high selectivity of 95.4%and a quantum efficiency of 6.6%.

关键词： Polymeric carbonnitride Regulate intermediate Photocatalytic CO_(2)reduction Amino alkylation ^(*)COOH adsorption

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

环境中工程纳米二氧化钛颗粒的表征与测定(英文)

引用

Journal of Zhejiang University-science A(Applied Physics & Engineering) 2014年第8期15卷 593-605页

作者： Zhuan-xi LUO Zhen-hong WANG Bin XU Ionnis L.SARAKIOTIS Gijs DU LAING Chang-zhou YAN key laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences laboratory of analytical chemistry and Applied Ecochemistry Ghent University

研究目的:纳米二氧化钛已是防晒霜、化妆品和光催化剂等的常用成分。纳米二氧化钛的大量应用,已被证明具有潜在的环境负面影响与人体健康风险。如何分析环境中工程纳米二氧化钛的理化性质无疑是认识其潜在风险的关键课题。研究方法:从... 详细信息

研究目的:纳米二氧化钛已是防晒霜、化妆品和光催化剂等的常用成分。纳米二氧化钛的大量应用,已被证明具有潜在的环境负面影响与人体健康风险。如何分析环境中工程纳米二氧化钛的理化性质无疑是认识其潜在风险的关键课题。研究方法:从工程纳米颗粒可用的表征与测定方法(如电镜显微方法、色谱与质谱技术等)的优缺点出发,结合稳定同位素与稀有元素示踪技术来探讨环境中工程纳米二氧化钛颗粒的分析方法。重要结论:环境中工程纳米二氧化钛的表征与测定方法仍需深入的研究,其可靠性需要现有各种分析技术的相互验证、良好的样品预处理技术和参考物质、以及稳定同位素与稀有元素技术示踪的配合。

关键词：二氧化钛工程纳米颗粒环境浓度产量分析方法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A mussel-inspired supramolecular hydrogel with robust tissue anchor for rapid hemostasis of arterial and visceral bleedings

引用

Bioactive Materials 2021年第9期6卷 2829-2840页

作者： Ziwen Qiao Xueli Lv Shaohua He Shumeng Bai Xiaochen Liu Linxi Hou Jingjing He Dongmei Tong Renjie Ruan Jin Zhang Jianxun Ding Huanghao Yang Qingyuan Innovation laboratory College of Chemical EngineeringFuzhou University2 Xueyuan RoadFuzhou350108PR China MOE key laboratory for analytical science of Food Safety and Biology State Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou University2 Xueyuan RoadFuzhou350108PR China College of Biological science and Engineering Fuzhou University2 Xueyuan RoadFuzhou350108PR China Department of Pediatric Surgery Fujian Provincial Hospital134 Dongjie RoadFuzhou350001PR China key laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022PR China

In recent years,the developed hemostatic technologies are still difficult to be applied to the hemostasis of massive arterial and visceral hemorrhage,owing to their weak hemostatic function,inferior wet tissue adhesion,and low mechanical ***,a mussel-inspired supramolecular interaction-cross-linked hydrogel with robust mechanical property(308.47±29.20 kPa)and excellent hemostatic efficiency(96.5%±2.1%)was constructed as a hemostatic ***,we combined chitosan(CS)with silk fibroin(SF)by cross-linking them through tannic acid(TA)to maintain the structural stability of the hydrogel,especially for wet tissue adhesion ability(shear adhesive strength=29.66±0.36 kPa).Compared with other materials reported previously,the obtained CS/TA/SF hydrogel yielded a lower amount of blood loss and shorter time to hemostasis in various arterial and visceral bleeding models,which could be ascribed to the synergistic effect of wound closure under wet state as well as intrinsic hemostatic activity of *** a superior hemostatic sealant,the unique hydrogel proposed in this work can be exploited to offer significant advantages in the acute wound and massive hemorrhage with the restrictive access of therapeutic moieties.

关键词： Mussel-inspired hydrogel Supramolecular cross-linking Robust tissue anchor Hemostatic sealant Arterial and visceral bleeding models

来源：

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

Proteomics of adjacent-to-tumor samples uncovers clinically relevant biological events in hepatocellular carcinoma

引用

National science Review 2023年第8期10卷 88-104页

作者： Hongwen Zhu Youpei Lin Dayun Lu Shisheng Wang Yuejia Liu Liangqing Dong Qian Meng Jing Gao Yuqiu Wang Nixue Song Yuying Suo Li Ding Pei Wang Bing Zhang Daming Gao Jia Fan Qiang Gao Hu Zhou Department of analytical chemistry State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor ResearchShanghai Institute of Materia Medica Chinese Academy of Sciences 2. Department of Liver Surgery and TransplantationLiver Cancer InstituteZhongshan Hospital and Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education Fudan University School of Chinese Materia Medica Nanjing University of Chinese Medicine institutes for Systems Genetics and NHC key Lab of Transplant Engineering and Immunology Sichuan Provincial Engineering Laboratory of Pathology in Clinical Application West China Hospital Sichuan University University of Chinese Academy of sciences Department of Medicine McDonnell Genome Institute Siteman Cancer Center Washington University Department of Genetics and Genomic sciences Icahn School of Medicine at Mount Sinai Lester and Sue Smith Breast Center Department of Molecular and Human Genetics Baylor College of Medicine State key laboratory of Cell Biology CAS Center for Excellence in Molecular Cell Science Shanghai Institute of Biochemistry and Cell Biology Chinese Academy of Sciences

Normal adjacent tissues(NATs) of hepatocellular carcinoma(HCC) differ from healthy liver tissues and their heterogeneity may contain biological information associated with disease occurrence and clinical outcome that has yet to be fully evaluated at the proteomic level. This study provides a detailed description of the heterogeneity of NATs and the differences between NATs and healthy livers and revealed that molecular features of tumor subgroups in HCC were partially reflected in their respective NATs. Proteomic data classified HCC NATs into two subtypes(Subtypes 1 and 2), and Subtype 2 was associated with poor prognosis and high-risk recurrence. The pathway and immune features of these two subtypes were characterized. Proteomic differences between the two NAT subtypes and healthy liver tissues were further investigated using data-independent acquisition mass spectrometry, revealing the early molecular alterations associated with the progression from healthy livers to NATs. This study provides a high-quality resource for HCC researchers and clinicians and may significantly expand the knowledge of tumor NATs to eventually benefit clinical practice.

关键词： proteomics hepatocellular carcinoma normal tissue adjacent to tumor heterogeneity

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

内源性双miRNA触发响应的DNA纳米结构动态自组装用于原位递送siRNA

引用

science China Materials 2023年第7期66卷 2938-2946页

作者：钟武坤黄蕾林玉红邢超卢春华 MOE key laboratory for analytical science of Food Safety and Biology Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food SafetyState Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou UniversityFuzhou 350116China institute of Nanobiomaterials and Immunology School of Life ScienceTaizhou UniversityTaizhou 318000China Fujian key laboratory of Functional Marine Sensing Materials Center for Advanced Marine Materials and Smart SensorsMinjiang UniversityFuzhou 350108China

通过多重miRNA触发的原位siRNA递送治疗策略可以有效提高对癌细胞的精确治疗.基于DNA纳米结构的可编程性、特异性分子识别、易于功能化修饰和良好生物相容性的特点,我们设计了一个3D DNA纳米治疗平台,用于实现双miRNA触发响应的siRNA原... 详细信息

通过多重miRNA触发的原位siRNA递送治疗策略可以有效提高对癌细胞的精确治疗.基于DNA纳米结构的可编程性、特异性分子识别、易于功能化修饰和良好生物相容性的特点,我们设计了一个3D DNA纳米治疗平台,用于实现双miRNA触发响应的siRNA原位递送.这种3D DNA纳米结构(TY1Y2)是由DNA四面体支架、两组Y型DNA(Y1和Y2)和EpCAM核酸适体通过自组装构建而成的.TY1Y2被特异性内化至靶标癌细胞后,能够被两个内源性miRNA(miR-21和miR-122)触发,从而产生强的荧光共振能量转移信号,用于双miRNAs成像.同时,治疗性的siRNA(siSurvivin和siBcl2)也可以通过链置换反应从TY1Y2中产生并进行原位释放,实现癌细胞的协同基因治疗.这种3D DNA纳米结构将内源性生物标记物的特异性成像和治疗性基因的原位递送整合为一个多功能纳米平台,在癌症诊断和治疗方面显示出广阔的应用前景.

关键词： DNA tetrahedra dynamic assembly miRNA in-situ delivery cell imaging gene therapy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：