检索结果-南通市图书馆

Semivolatile organic compounds, organochlorine pesticides and heavy metals in sediments and risk assessment in Huaihe River of China

引用

Journal of Environmental Sciences 2006年第2期18卷 236-241页

作者： HUANG Hong ou wen-hua WANG Lian-sheng College of Marine Science and Technology Shanghai Fisheries University Shanghai 200090 China School of Environmental Science and Technology Tongji University Shanghai 200092 China College of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing 210093 China

The concentrations of semivolatile organic compounds, organochlorine pesticides and heavy metals in sediments from Jiangsu reach of Huaihe River, China, were presented. The organic compounds were extracted by acetone： n-hexane using a Soxhlet apparatus and concentrations were performed using HP6890 gas chromatography coupled by FID and ECD detector. The total contents of 8 heavy metals by inductively coupled plasma atomic emission spectrometry or cold-vapor/atomic absorption spectrometry were developed. 30 semivolatile organic compounds were detected, including substituted benzenes, phenols, phthalates and polycyclic aromatic hydrocarbons, from 0.01 to 3.01 mg/kg. 16 organochlorine pesticides were almost detected and from 0.010 to 2.339 μg/kg. Concentrations of major metals were 50 mg/kg or less, mean level of mercury was only 0.055 mg/kg. Compared to sediment quality guidelines （SQGs）, concentrations of some semivolatilc organic compounds were high enough to cause possible toxic effects to living resources. The organochlorine pesticides presented relatively low, lower than threshold effect concentrations （TECs）, harmful effects on sediment-dwelling organisms were not expected. Chromium posed probable toxic effects to the living resources, other heavy metals had no threat temporarily according to SQGs.

关键词： sediment semivolatile organic compounds organochlorinc pcsticidcs heavy mctals sediment quality guiedlines Huaihe River

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

EPIC 202843107:a close eclipsing binary containing a δ Scuti variable

引用

Research in Astronomy and Astrophysics 2019年第8期19卷 63-68页

作者： Jian-wen ou Ming Yang Ji-Lin Zhou School of Astronomy and Space Science & Key Laboratory of Modern Astronomy and Astrophysics in Ministry of Education Nanjing University

This paper reports on the discovery that an eclipsing binary system, EPIC 202843107, has aδ Scuti variable component. The phased light curve from the Kepler space telescope presents a detached configuration. The binary modeling indicates that the two component stars have almost the same radius and may have experienced orbital circularization. Frequency analyses are performed for the residual light curve after subtracting the binary variations. The frequency spectrum reveals that one component star is a δ Scuti variable. A large frequency separation is cross-identified with the corresponding histogram, the Fourier transform and the echelle diagram method. The mean density of the δ Scuti component is estimated to be 0.09 g cm-3 based on the large separation and density relation. Systems like EPIC 202843107 are helpful to study the stellar evolution and physical state of binary stars.

关键词： binaries:eclipsing-stars:individual:EPIC 202843107 stars:variables:δ Scuti stars:oscillations

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

Recent advances in detoxification strategies for zearalenone contamination in food and feed

引用

Chinese Journal of Chemical Engineering 2021年第2期34卷 168-177页

作者： Na Wu wen ou Zhidong Zhang Yuwen Wang Qing Xu He Huang School of Food Science and Pharmaceutical Engineering Nanjing Normal UniversityNanjing 210046China School of Pharmaceutical Sciences Nanjing Tech UniversityNanjing 211816China Xinjiang Laboratory of Special Environmental Microbiology Urumqi 830091China

Zearalenone(ZEN)is a widely distributed mycotoxin that frequently contaminates crops and animal *** can cause serious health problems in livestock and humans alike,leading to great economic losses in the food industry and livestock ***,approaches for efficient ZEN decontamination in food and feed are urgently *** physical and chemical methods may decrease the nutritional quality of food and palatability of feed,or leading to residues and safety *** contrast,biological methods for the removal or degradation of ZEN overcome these problems,especially for biological degradation by microorganisms and specific enzymes extracted from strains that can convert ZEN to less toxic or even completely harmless *** this review,we comprehensively describe methods for ZEN degradation,focusing especially on biological ***,emerging strategies and advice on remaining challenges in biodegradation research are also briefly discussed.

关键词： Mycotoxin Removal Degradation Zearalenone Food safety

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

Effects of Scutellaria Baicalensis on Activity and Biofilm Formation of Klebsiella Pneumoniae

引用

Chinese Medical Sciences Journal 2016年第3期31卷 180-184页

作者： Wei Chen Bei Li Shuai Li Yi-wen ou Qin ou The First School of Clinical Medicine Hubei University of Medicine Department of Medical Microbiology Hubei University of Medicine

Objective To explore the effects of Scutellaria baicalensis on activity and biofilm formation of Klebsiella pneumonia(Kp).Methods The broth and agar dilution methods were carried out to determine minimum inhibitory concentration and minimum bactericidal concentration of Scutellaria baicalensis for ***-32 system was used to assay TW518 susceptibility to *** biofilms were formed in vitro and stained with Bac Light Live/Dead *** class integron geneⅠ1 m RNA expression was analyzed with *** The minimum inhibitory concentration of Scutellaria baicalensis on TW518 identified as a Kp colony was 32 mg/ml,and minimum bactericidal concentration was 64 mg/*** baicalensis and broad-spectrum penicillin,cephalosporin,quinolones,or beta-lactamase had synergistic bactericidal *** formation activity of Kp treated with Scutellaria baicalensis was significantly lower than that of the control *** class integron geneⅠ1 m RNA expression of TW518 was significantly inhibited by Scutellaria *** Scutellaria baicalensis has sterilization effect on Kp,and Scutellaria baicalensis could effectively inhibit Kp biofilm formation with prolonged *** baicalensis might inhibit Kp biofilm formation through down-regulating integron geneⅠ1 expression.

关键词： Scutellaria baicalensis klebsiella pneumoniae biofilm formation integron geneⅠ1

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

Nanopillar-forest based surface-enhanced Raman scattering substrates

引用

Science China(Information Sciences) 2014年第8期57卷 230-237页

作者： BAO AiDa MAO HaiYang XIONG JiJun CHEN ZhuoJie ou wen CHEN DaPeng MOE Key Laboratory of Instrumentation Science & Dynamic Measurement North University of China School of Information and Electronics Beijing Institute of Technology Key Laboratory of Microelectronics Devices & Integrated Technology Institute of MicroelectronicsChinese Academy of Sciences National Key Laboratory of Science and Technology on Micro/Nano Fabrication Institute of MicroelectronicsPeking University

In this work,nanopillar-forest based surface-enhanced Raman scattering substrates were fabricated using a novel *** key technique of the approach is taking advantage of convexes on Poly-Si surfaces as support structures in sidewall *** tip-diameters of the fabricated nanopillars are from 5 to 10 nm,heights are of several microns,and density of the nanopillar-based forests is around 20/μ*** these nanopillar forests,there are plenty of nanoscale *** covered with a thin layer of noble metal,the nanopillar forests exhibit a high SERS-active *** measurement results demonstrate that the nanopillar-forest based SERS substrates have an enhancement factor of an order of 4.62×*** is expected that such SERS substrates may have applications in biological monitoring and chemical detection.

关键词： surface-enhanced Raman scattering(SERS) nanopillar forests sidewall technology Poly-Si films electromagnetic field distributions

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

Waveguide-coupled deterministic quantum light sources and post-growth engineering methods for integrated quantum photonics

引用

Chip 2022年第3期1卷 28-49页

作者： Xu-Dong Wang Yi-Fan Zhu Ting-Ting Jin Wei-wen ou Xin ou Jia-Xiang Zhang State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200092China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Integrated photonic quantum circuits(IPQCs)have attracted increasing attention in recent years due to their widespread applications in quantum information *** the most envisioned quantum technologies such as quantum communications,quantum computer and quantum simulations have placed a strict constraint on the scalability of chip-integrated quantum light *** introducing sizeconfined nanostructures or crystal imperfections,low-dimensional semiconductors have been broadly explored as chip-scale deterministic single-photon sources(SPSs).Thus far a variety of chip-integrated deterministic SPSs have been investigated across both monolithic and hybrid photonic platforms,including molecules,quantum dots,color centers and two-dimensional *** the rapid development of the chip-scale generation of single photons with deterministic quantum emitters,the field of IPQCs has raised new challenges and *** this paper,we highlight recent progress in the development of waveguide-coupled deterministic SPSs towards scalable IPQCs,and review the post-growth tuning techniques that are specifically developed to engineer the optical properties of these WG-coupled *** prospects on stringent requirement for the quantum engineering toolbox in the burgeoning field of integrated photonics are also discussed.

关键词： Single photon sources On-chip Integrated circuits Post-growth engineering Low-dimensional semiconductors

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

Primary gastric melanoma in a young woman:A case report

引用

World Journal of Clinical Cases 2020年第24期8卷 6425-6431页

作者： Guo-Jie Long wen-Ting ou Lin Lin Cai-Jin Zhou Department of Gastrointestinal Surgery Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524002Guangdong ProvinceChina Department of Oncology Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524002Guangdong ProvinceChina

BACKGRouND Most melanomas identified in the stomach are *** primary gastric melanoma(PGM)is extremely *** such,clinical reports of PGM are scarce in the literature,lending to the challenge of diagnosis and *** SUMMARY A 31-year-old woman presented with a 1-mo history of dysphagia but no symptoms of abdominal pain,abdominal distension,nausea,vomiting,hematemesis,or *** patient reported an unintentional weight loss of 6 kg within that ***-taking revealed no previous medical conditions or surgical *** computed tomography at a local hospital had suggested gastric *** examination in our hospital found a large,irregular,black *** laparoscopic exploration found the tumor on the side of the stomach fundus penetrating through the serosa,and enlarged lymph nodes(groups 1,3,7,and 9)fused into a mass,surrounding the peripheral artery and *** immunohistochemistry suggested gastric malignant *** emission tomography-computed tomography confirmed *** with programmed cell death protein 1 antagonist(toripalimab)plus chemotherapy(paclitaxel)was initiated but discontinued upon tumor *** the last telephone follow-up,the patient reported poor general condition but was *** Although unresolved and ongoing,this rare case of PGM expands the overall knowledge about this rare tumor’s diagnosis and management.

关键词： Primary gastric melanoma Pathogenesis Diagnosis Treatment Prognosis Case report

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

Metallic ureteral stent in restoring kidney function: Nine case reports

引用

World Journal of Clinical Cases 2020年第13期8卷 2841-2848页

作者： Wei Gao Tong-wen ou Xin Cui Jiang-Tao Wu Bo Cui Department of Urology Xuanwu HospitalCapital Medical UniversityBeijing 100053China

BACKGRouND Retroperitoneal fibrosis is an exceptionally rare disease characterized by proliferation of fibrous tissue and inflammation in the *** features many symptoms in the kidneys and in other organs and usually leads to ureteral *** SUMMARY Here we present 9 consecutive cases of idiopathic retroperitoneal fibrosis(IRPF)in patients who presented to the Department of Nephrology or Department of Rheumatology,Xuanwu Hospital,Capital Medical University,Beijing,China,between January 2012 and June 2017 with ureteral obstruction due to external compression of the ureter that led to hydronephrosis and kidney *** tomography imaging was used to identify hydronephrosis and ureteral obstruction and to evaluate kidney *** patient was diagnosed with IRPF based on clinical observation and computed tomography examination *** restore kidney function,a retrograde metallic stent was placed in the ureter under X-ray guidance 2 d after each patient’s *** perioperative complications occurred in any patient,but postoperative complications occurred in two patients as follows:Patient 2 had stent migration and repeated metallic stent infections that resolved with treatment;and patient 4 had postoperative hematuria because he resumed normal activities too soon after stent placement(contrary to instruction).Placement of the metallic ureteral stents provided relief from ureteral obstruction and restored kidney function in all *** our 9-case series underscores the utility and efficacy of applying the Resonance®metallic ureteral stent to treat ureteral obstruction in patients with *** all retroperitoneal fibrosis cases in our series,ureteral stents provided effective relief and were shown to reduce the incidence rate of perioperative and postoperative complications.

关键词： Retroperitoneal fibrosis Metallic ureteral stent Ureteral obstruction Computed tomography Kidney function Plastic stent Case report

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

Yb^(3+) Ion Upconversion Luminescence from YbEr:ZBLAN Glass Excited by 966 nm Laser Light

引用

Chinese Physics Letters 2001年第2期18卷 280-282页

作者： CHEN Xiao-Bo NIE Yu-Xin wen ou Analysis and Testing Center Key Laboratory of Beam Technology and Materials Modification of Education MinistryBeijing Normal UniversityBeijing 100875 Laboratory of Optical Physics Institute of PhysicsChinese Academy of SciencesBeijing 100080 Beijing Glass Research College Beijing 100062

The upconversion luminescence of several YbEr co-doped Zr-Ba-La-Al-Na(ZBLAN)glass samples(Er(0.5)Yb(3):ZBLAN,Er(0.5)Yb(1):ZBLAN and Er(0.5):ZBLAN)has been studied.A new kind of upconversion cooperative radiation fluorescence,which comes from coupled cluster states of two Yb^(3+)ions has been *** is significant in that it may lead to a new path to achieve blue upconversion luminescence,which has promising upconversion applications.

关键词： ZBLAN luminescence cluster

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

Design of a personnel safety interlock system for proton therapy

引用

Nuclear Science and Techniques 2021年第4期32卷 49-59页

作者： Shou-Yuan Wang Yun-Tao Song Han-Sheng Feng Shi Li Hai-Lin Cao Jing Zhang ou-wen Huang Zhu Li Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Hefei CAS Ion Medical and Technical Devices Co.Ltd Hefei 230088China

Proton therapy is the most advanced radiotherapy approach in the world,and causes less damage to normal human tissue than traditional *** the treatment process produces a high-energy proton beam,the personnel safety interlock system mainly considers measures to protect personnel from radiation hazards during beam preparation and the beam release *** other safety interlock systems,the personnel safety interlock system designed in this study focuses on the safety and stability of the system *** hardware and software of important interlock control loops are designed and developed according to the requirements of Safety Integrity Level 3 specified by IEC61508.A set of redundant ring networks was developed to ensure that damage to a certain network line does not affect the normal operation of the system.A set of friendly operation interfaces and data storage systems were developed to ensure that the operator can monitor the data in real time and trace the *** personnel safety interlock system mainly includes a beam enabling function,clearance function,and emergency stop *** system was put into actual use and successfully ensured personnel safety.

关键词： Personnel safety Radiation protection Interlock system Safety integrity levels

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：