检索结果-南通市图书馆

Analysis of cancer-specific survival in patients with metastatic colorectal cancer: A evidence-based medicine study

World Journal of Gastrointestinal Surgery 2024年第6期16卷 1791-1802页

作者： Yin-Jie Zhou Zhi-E Tan Wei-Da Zhuang xin-hua xu Department of Oncology The First College of Clinical Medical ScienceChina Three Gorges University&Yichang Central People's HospitalYichang 443000Hubei ProvinceChina Department of Nuclear Medicine The First College of Clinical Medical ScienceChina Three Gorges University&Yichang Central People's HospitalYichang 443000Hubei ProvinceChina Department of Athe and Intestinal Surgery Cancer Hospital of The Chinese Academy of Medical SciencesBeijing 100021China

BACKGROUND Metastatic colorectal cancer(mCRC)is a common malignancy whose treatment has been a clinical ***-specific survival(CSS)plays a crucial role in assessing patient prognosis and treatment ***,there is still li-mited research on the factors affecting CSS in mCRC patients and their *** To predict CSS,we developed a new nomogram model and risk grading system to classify risk levels in patients with *** Data were extracted from the United States Surveillance,Epidemiology,and End Results database from 2018 to *** eligible patients were randomly divided into a training cohort and a validation *** Cox proportional hazards model was used to investigate the independent risk factors for CSS.A new nomogram model was developed to predict CSS and was evaluated through internal and external *** A multivariate Cox proportional risk model was used to identify independent risk factors for ***,new CSS columns were developed based on these *** consistency index(C-index)of the histogram was 0.718(95%CI:0.712-0.725),and that of the validation cohort was 0.722(95%CI:0.711-0.732),indicating good discrimination ability and better performance than tumor-node-metastasis staging(C-index:0.712-0.732).For the training set,0.533,95%CI:0.525-0.540;for the verification set,0.524,95%CI:*** calibration map and clinical decision curve showed good agreement and good potential clinical *** risk grading system divided all patients into three groups,and the Kaplan-Meier curve showed good stratification and differentiation of CSS between different *** median CSS times in the low-risk,medium-risk,and high-risk groups were 36 months(95%CI:34.987-37.013),18 months(95%CI:17.273-18.727),and 5 months(95%CI:4.503-5.497),*** Our study developed a new nomogram model to predict CSS in patients with synchronous *** addition,the risk-grading system helps to accurately ass

关键词： Colorectal tumor Surveillance epidemiology and end results database Nomogram analysis Survival prognosis Retrospective study

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

Dechlorination mechanism of 2,4-dichlorophenol by Ni/Fe nanoparticles in the presence of humic acid

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第1期10卷 121-126页

作者： Jing-jing WO Zhen ZHANG xin-hua xu Department of Environmental Engineering Zhejiang University Hangzhou 310027 China School of Bioscience Taizhou University Linhai 317000 China

To understand the feasibility of its application to the in situ remediation of contaminated groundwater,the dechlori-nation of 2,4-dichlorophenol (2,4-DCP) by Ni/Fe nanoparticles in the presence of humic acid (HA) was *** found that,as high performance liquid chromatography (HPLC) was used,the 2,4-DCP was first quickly reduced to o-chlorophenol (o-CP) and p-chlorophenol (p-CP),and then reduced to phenol as the final *** experimental results indicated that HA had an adverse effect on the dechlorination of 2,4-DCP by Ni/Fe nanoparticles,as the HA concentration increased,the removal rate decreased *** also demonstrated that 2,4-DCP was reduced more easily to o-CP than to p-CP,and that the sequence of the tendency in dechlorination of intermediates was p-CP>*** electron microscope (TEM) showed that HA could act as an adsorbate to compete reactive sites on the surface of Ni/Fe nanoparticles to decrease the dechlorination *** we con-cluded that the dechlorination reaction of 2,4-DCP over Ni/Fe nanoparticles progressed through catalytic reductive dechlorination.

关键词： Dechlorination Ni/Fe nanoparticles 2 4-dichlorophenol (2 4-DCP) Humic acid (HA)

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

Kinetics of 2,4-dichlorophenol dechlorination by Pd-Fe bimetallic nanoparticles in the presence of humic acid

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第1期9卷 118-124页

作者： Zhen ZHANG Jing-jing WO Naman CISSOKO xin-hua xu Department of Environmental Engineering Zhejiang University Hangzhou 310027 China School of Bioscience Taizhou University Linhai 317000 China

The remediation of groundwater which contains chlorinated organic compounds (COCs) by nanoscale bimetallic catalysts has received increasing interest in recent years. This report presents the dechlorination of 2,4-dichlorophenol (2,4-DCP) by Pd-Fe bimetallic nanoparticles in the presence of humic acid (HA) to investigate the feasibility of using Pd-Fe for the in situ remediation of contaminated groundwater. Our experimental results indicated that HA had an adverse effect on the dechlorination of 2,4-DCP by Pd-Fe nanoparticles. The rate constant k values of 2,4-DCP dechlorination were 0.017, 0.013, 0.009, 0.006 and 0.004 min?1 for HA concentrations of 0, 5, 10, 15 and 20 mg/L, respectively. The relationship between HA dosage and k values can be described as a linear model.

关键词： 2,4-dichlorophenol (2,4-DCP) Dechlorination Pd-Fe bimetallic nanoparticles Humic acid (HA)

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

Reaction of Arylselenium Titanocene Complexes with Diaryl Iodonium Salts——a Convenient Synthesis of Unsymmetrical Diarylselenides

引用

Chinese Chemical Letters 2001年第5期12卷 377-378页

作者： Xiang huaNG Lu Ling WU xin hua xu Department of Chemistry Zhejiang University(Xixi Campus)Hangzhou 310028

The diaryldiselenides reacted with titanocene hydried （Cp2TiH） generted from Cp2TiCl2/i-BuMgBr to give arylselenium complexes of titanocene. They reacted readily with diaryliodoiums salt to give unsymmetical diaryls... 详细信息

关键词： Diarylselenide diaryl iodonium salt arylselenium titanocene complexes synthesis.

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

Catalytic Dechlorination of Chlorobenzene in Water by Pd/Fe System

引用

Chinese Chemical Letters 2003年第7期14卷 700-703页

作者： xin hua xu Hong Yi ZHOU Da Hui WANG Department of Environmental Engineering Zhejiang UniversityHangzhou 310027

Chlorobenzene was dechlorinated by Pd/Fe bimetallic system in water through catalytic reduction. The dechlorination rate increases with increase of bulk loading of Pd due to the increase of both the surface loading of the Pd and the total surface area. For conditions with 0.005% Pd/Fe, 45% dechlorination efficiency was achieved within 5 h. The dechlorinated reaction is believed to take place on the bimetal surface in a pseudo-first-order reaction, with the rate constant being 0.0043 min-1.

关键词： Reductive dechlorination catalytic Pd/Fe chlorobenzene.

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

Manganese removal from the Qiantang River source water by pre-oxidation:A case study

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第3期10卷 450-457页

作者： Jian-wen ZHU Zhen ZHANG Xiao-min LI xin-hua xu Da-hui WANG Department of Environmental Engineering Zhejiang University Hangzhou 310027 China Hangzhou Water Group Company Ltd. Hangzhou 310009 China School of Bioscienee Taizhou University Linhai 317000 China

We evaluated several different pre-oxidation treatments, namely the introduction of either potassium permanganate (KMnO4), chlorine (Cl2), or both to remove manganese (Mn) from the Qiantang River source water. Our results showed that Mn removal percentages were 12.7%, 71.0%, 17.4% and 58.7% when none of the oxidants, KMnO4 only, Cl2 only, or both oxidants were added, respectively. Furthermore, a field study showed that when the available Mn concentration in the source water was 0.14 mg/L, it could be reduced to less than 0.05 mg/L when a solution of KMnO4 (0.47 mg/L) was added as the oxidant.

关键词： Pre-oxidation Potassium permanganate (KMnO2) Chlorine (Cl2) Manganese (Mn) removal

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

Cesium hydroxide-catalyzed hydrothiolation of alkynyl selenides to highly stereo- and regioselectively synthesize(Z)-1-organoseleno-2-arylthio-1-alkenes

引用

Chinese Chemical Letters 2011年第6期22卷 687-690页

作者： Ai He Yu Ren hua Qiu Nian Yuan Tan Li Feng Peng xin hua xu Department of Biological and Chemical Engineering Hunan Mechanical and Electrical Polytechnic Changsha 410151 China College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

In the presence of catalytic amount of cesium hydroxide the hydrothiolation of alkynyl selenides occurred at room temperature in DMF under nitrogen atmosphere to give exclusive（Z）-1-organoseleno-2-arylthio-1-alkene in excellent *** could provide a new and expedient way for the preparation of（Z）-1-arylseleno-2-arylthio-1-alkene.

关键词： Hydrothiolation Cesium hydroxide Alkynyl selenides (Z)-1-Organoseleno-2-arylthio-1-alkene

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

Degradation Mechanism of Cationic Red X-GRL by Ozonation

引用

Chinese Chemical Letters 2003年第12期14卷 1309-1312页

作者： Wei Rong ZHAO xin hua xu Hui Xiang SHI Da Hui WANG Department of Environmental Engineering Zhejiang UniversityHangzhou 310027

The degradation mechanism of Cationic Red X-GRL was investigated when the intermediates, the nitrate ion and the pH were analyzed in the ozonation. The degradation of the Cationic Red X-GRL includes the de-auxochrome stage, the decolour stage, and the decomposition of fragment stage. During the degradation process, among the six nitrogen atoms of Cationic Red X-GRL, one is transferred into a nitrate ion, one becomes the form of an amine compound, and the rest four are transformed into two molecules of nitrogen. In the course of the ozonation of Cationic Red X-GRL, the direct attack of ozone is the main decolour effect.

关键词： Ozonation cationic Red X-GRL mechanism intermediates dye decolourization.

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 simple and convenient method for the synthesis of S-aryl phosphorothioates catalyzed by cesium hydroxide

引用

Chinese Chemical Letters 2013年第12期24卷 1103-1105页

作者： Yue-Jun Ouyang Yuan-Yuan Li Ning-Bo Li xin-hua xu Department of Chemistry and Chemical Engineering Huaihua University College of Chemistry and Chemical Engineering Hunan University

In the presence of a catalytic amount of cesium hydroxide, the corresponding S-aryl phosphorothioates can he obtained by the reactions of dialkyl phosphites with diaryldisulfides in excellent yields at room temperature, using DMSO as a solvent. The reaction mechanism was discussed. The method provides a new and expedient path for the preparation of $-aryl phosphorothioates.

关键词： Cesium hydroxide Diaryldisulfides O O-Dialkyl-S-arylphosphorothioates

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 new synthesis of alkynyl tellurides promoted by CsOH and 4  MS

引用

Chinese Chemical Letters 2008年第12期19卷 1401-1402页

作者： Yin Hui Li Jian Ping Li Xiang Xia Kang Bing Zou Ruo xin Li xin hua xu College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China The First Affiliated Hospital College of Medical Science Zhejiang University Hangzhou 310003 China

The mixture of cesium hydroxide and terminal alkynes in dry DMF in the presence of 4 A molecular sieves was stirred for 3.0 h at room temperature under N2, then aryltellurenyl bromide in THF was added, and the reactio... 详细信息

关键词： Cesium hydroxide Terminal alkynes Alkynyl telluiride

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：