检索结果-南通市图书馆

Synergistic effect of various elements in Fe_(41)Co_(7)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2) amorphous alloy hollow ball on catalytic degradation of methylene blue

引用

Journal of Rare Earths 2022年第4期40卷 605-615,I0004页

作者： wenhu luo Qingjun Chen Li Ji Xinyuan Peng Guosheng Huang School of Materials Science and Engineering Nanchang Hongkong UniversityNanchang 330063China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research Institute(LSMRI)Qingdao 266237China

Metallic glasses have recently attracted great attention in terms of degrading dyes and other organic pollutants as an environmentally friendly material for wastewater ***,we report a new type of amorphous catalyst Fe_(41)Co_(7)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2) hollow *** demonstrate that the catalyst can still completely decolorize the 20 mg/L methylene blue(MB)solution after reused for 50 times under conditions of pH=5,catalyst content 0.5 g/L,and temperature 80°*** catalyst is easily broken during degradation,so the inner surface also provides additional active *** Fe_(41)Co_(7)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2) amorphous alloy hollow balls were characterized by energy dispersive X-ray specroscopy(EDS),scanning electron microscopy(SEM)and X-ray photoelectron spectroscopy(XPS),*** elements in the catalytic system have a synergistic catalytic *** cycle Fe^(2+)/Fe^(3+),Co^(2+)/Co^(3+)and Mo^(4+)/Mo^(6+) promote mutual conversion and accelerate the catalytic process of their reaction with H_(2)O_(2),forming a self-stable redox cycle *** them,Fe^(2+)promotes the conversion of Co^(3+)to Co^(2+),and Mo^(4+) promotes the conversion of Fe^(3+)to Fe^(2+),mainly Fe^(2+)and Co^(2+)react with H_(2)O_(2) to generate•*** and Cr elements form MoO_(2) and Cr_(2)O_(3) plasma compounds on the surface,which act as a protective film to make the catalyst more stable and be repeated used more frequently.

关键词： Metallic glasses Methylene blue degradation Synergistic catalytic Repeatability Hollow ball Rare earths

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

基于层次分析法的非公有制林业运行趋势模型

引用

东北林业大学学报 2012年第2期40卷 93-95,99页

作者：雒文虎东北林业大学哈尔滨150040

运用层次分析法,在专家咨询和借鉴有关评价体系的基础上,确定了国有林区非公有制林业运行趋势的指标体系,构建了预测非公有制林业运行趋势的模型。分析结果显示:非公有制林业运行的趋势——运行主体向现代企业形式的集约化发展,运行目... 详细信息

运用层次分析法,在专家咨询和借鉴有关评价体系的基础上,确定了国有林区非公有制林业运行趋势的指标体系,构建了预测非公有制林业运行趋势的模型。分析结果显示:非公有制林业运行的趋势——运行主体向现代企业形式的集约化发展,运行目标向追求生态效益等多效益发展,运行环境向政府加大扶持力度上发展。

关键词：层次分析法非公有制林业运行趋势

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

大学生手机依赖与成人ADHD症状、抑郁症状和神经质的关系

引用

中国心理卫生杂志 2021年第7期35卷 596-598页

作者：钱淑红雒文虎杨冰雨东北林业大学哈尔滨150040

大学生手机依赖是指在使用手机中消耗过多的精力和时间,进而可能损害心理认知和社会功能的现象^[1]。手机依赖会导致头晕、心悸等生理不适,引发焦虑、压力、睡眠障碍和学业困难等心理适应问题。注意缺陷多动障碍(attention-deficit/hype... 详细信息

大学生手机依赖是指在使用手机中消耗过多的精力和时间,进而可能损害心理认知和社会功能的现象^[1]。手机依赖会导致头晕、心悸等生理不适,引发焦虑、压力、睡眠障碍和学业困难等心理适应问题。注意缺陷多动障碍(attention-deficit/hyperactivity disorder,ADHD)是一种神经发育障碍,有研究显示:有注意缺陷的青少年在手机使用上会消耗更多的时间^[2],因此,有ADHD症状的个体更有可能出现手机依赖问题。

关键词：手机依赖 ADHD症状抑郁症状神经质

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

大学生危险和有害饮酒现状及其与成人ADHD症状和压力的关系

引用

中国心理卫生杂志 2021年第1期35卷 46-51页

作者：钱淑红雒文虎段一鑫张克峰东北林业大学哈尔滨150040 黑龙江东方学院哈尔滨150066

目的:探讨大学生危险饮酒、有害饮酒的现状及其与ADHD症状、压力的关系。方法:选取大学生4999名(男2265人,女2734人),采用酒精依赖性疾患识别测验(AUDIT)、成人ADHD症状自评量表(ASRS)、中文版压力知觉量表(CPSS)进行调查,AUDIT≥7分为... 详细信息

目的:探讨大学生危险饮酒、有害饮酒的现状及其与ADHD症状、压力的关系。方法:选取大学生4999名(男2265人,女2734人),采用酒精依赖性疾患识别测验(AUDIT)、成人ADHD症状自评量表(ASRS)、中文版压力知觉量表(CPSS)进行调查,AUDIT≥7分为危险和有害饮酒。结果:危险和有害饮酒的大学生有547人(10.9%),ASRS总分均值为(24.5±9.4),CPSS总分均值为(24.1±6.9),ADHD全量表有症状占比14.2%,有压力占比50.1%。非条件logistic回归分析表明,男性、父亲酗酒、母亲酗酒、有体育锻炼、有ADHD症状、有压力、有多动冲动症状是危险和有害饮酒的危险因素(OR=4.50、1.46、7.58、1.35、2.98、1.91、2.53)。结论:本研究提示,有ADHD症状、多动冲动症状和压力的大学生发生危险和有害饮酒的风险较高。

关键词： ADHD症状压力危险和有害饮酒大学生

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

Mechanical and tribological properties of nanocomposites incorporated with two-dimensional materials

引用

Friction 2020年第5期8卷 813-846页

作者： Zhengjia JI Lin ZHANG Guoxin XIE wenhu XU Dan Guo Jianbin luo Braham PRAKASH State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China College of Mechanical Engineering Qinghai UniversityXi'ning 810016China Key Laboratory of Tribology School of Mechatronics EngineeringNanchang UniversityNanchang 330031China

In recent years, attempts to improve the mechanical properties of composites have increased remarkably owing to the inadequate utilization of matrices in demanding technological systems where efficiency, durability, and environmental compatibility are the key requirements. The search for novel materials that can potentially have enhanced mechanical properties continues. Recent studies have demonstrated that two-dimensional (2D) nanomaterials can act as excellent reinforcements because they possess high modulus of elasticity, high strength, and ultralow friction. By incorporating 2D nanomaterials in a composite, 2D nanomaterial-based composites (2DNBCs) have been developed. In view of this, a critical review of recent mechanical and tribological studies based on 2DNBCs has been undertaken. Matrices such as polymers, ceramics, and metals, as well as most of the representative 2D nanomaterial reinforcements such as graphene, boron nitride (BN), molybdenum disulfide (MoS2), and transition metal carbides and nitrides (MXenes) have been included in this review. Their preparation strategies, intrinsic mechanical properties, friction and lubrication performances, strengthening mechanisms, influencing factors, and potential applications have been comprehensively discussed. A brief summary and prospects are given in the final part, which would be useful in designing and fabricating advanced 2D nanocomposites in the future.

关键词： two-dimensional(2D)nanomaterials composites mechanical property friction wear lubrication

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 review on tribology of polymer composite coatings

引用

Friction 2021年第3期9卷 429-470页

作者： Yilong REN Lin ZHANG Guoxin XIE Zhanbo LI Hao CHEN Hanjun GONG wenhu XU Dan GUO Jianbin luo State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China School of Mechatronics Engineering Key Laboratory of TribologyNanchang UniversityNanchangJiangxi 33003China

Self-lubricating polymer composite coatings,with tailorable tribological and mechanical properties,have been widely employed on mechanical parts to reduce friction and wear,which saves energy and improves the overall performance for applications such as aerospace satellite parts,shafts,gears,and *** addition of functional fillers can overcome the limitations of single-polymer coatings and extend the service life of the coatings by providing a combination of low friction,high wear resistance,high load bearing,high temperature resistance,and high *** paper compares the heat resistance,and the tribological and mechanical properties of common polymer matrices,as well as the categories of functional fillers that improve the coating *** scopes,process parameters,advantages,and limitations of the preparation methods of polymer coatings are discussed in *** tribological properties of the composite coatings with different matrices and fillers are compared,and the lubrication mechanisms are *** reduce friction by promoting the formation of transfer films or liquid shear *** of the mechanical properties of the composite coatings with fillers of different morphologies is described in terms of strengthening and toughening mechanisms,including a stress transfer mechanism,shear yielding,crack bridging,and interfacial *** test and enhancement methods for the adhesion properties between the coating and substrate are *** coating adhesion can be enhanced through mechanical treatment,chemical treatment,and energy treatment of the ***,we propose the design strategies for high-performance polymer composite coating systems adapted to specific operating conditions,and the limitations of current polymer composite coating research are identified.

关键词： polymer coatings tribological properties mechanical properties adhesion properties coating design

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

基于低共熔相变材料二元液-固相图的绘制实验设计

引用

西南师范大学学报（自然科学版） 2021年第9期46卷 147-153页

作者：赵亚萍张帅咸春颖沈丽张健边绍伟张明罗文虎牛汝男陈令妍东华大学基础化学实验中心上海201620 东华大学化学化工与生物工程学院上海201620

以有机相变材料癸酸-十二醇作为二元液-固体系相图绘制实验的研究对象,通过理论计算体系中各物质的相变温度绘制理论温度组成(T-x)相图,并得到低共熔混合物温度和组成的理论值.配制不同摩尔分数的癸酸-十二醇混合物,利用热分析方法采用... 详细信息

以有机相变材料癸酸-十二醇作为二元液-固体系相图绘制实验的研究对象,通过理论计算体系中各物质的相变温度绘制理论温度组成(T-x)相图,并得到低共熔混合物温度和组成的理论值.配制不同摩尔分数的癸酸-十二醇混合物,利用热分析方法采用凝固点降低测定物质摩尔质量实验简单装置,测量各混合物冷却过程中相变温度,绘制有机酸-有机醇二元体系相图,得到低共熔点温度和组成,并与理论值进行比较.该实验避免了经典物理化学实验“二组分金属相图的绘制”在教学中金属样品融化温度高且耗时较长等问题,改用熔点较低的相变材料绘制固液相图,在满足二组分液固相图实验要求的同时,将绿色化学实验设计理念融入到基础物理化学实验教学中.

关键词：低共熔混合物有机相变材料二元液-固体系相图物理化学实验

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

Smart drug delivery systems for precise cancer therapy

引用

Acta Pharmaceutica Sinica B 2022年第11期12卷 4098-4121页

作者： Xiaoyou Wang Chong Li Yiguang Wang Huabing Chen Xinxin Zhang Cong luo wenhu Zhou Lili Li Lesheng Teng Haijun Yu Jiancheng Wang College of Pharmaceutical Sciences Southwest UniversityChongqing 400715China Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking UniversityBeijing 100191China School of Radiation Medicine and Protection Soochow UniversitySuzhou 215123China Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China Department of Pharmaceutics Wuya College of InnovationShenyang Pharmaceutical UniversityShenyang 110016China Xiangya School of Pharmaceutical Sciences Central South UniversityChangsha 410013China CAS Center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and TechnologyBeijing 100190China School of Life Sciences Jilin UniversityChangchun 130012China

Nano-drug delivery strategies have been highlighted in cancer treatment, and much effort has been made in the optimization of bioavailability, biocompatibility, pharmacokinetics profiles, and in vivo distributions of anticancer nano-drug delivery systems. However, problems still exist in the delicate balance between improved anticancer efficacy and reduced toxicity to normal tissues, and opportunities arise along with the development of smart stimuli-responsive delivery strategies. By on-demand responsiveness towards exogenous or endogenous stimulus, these smart delivery systems hold promise for advanced tumor-specificity as well as controllable release behavior in a spatial-temporal manner. Meanwhile, the blossom of nanotechnology, material sciences, and biomedical sciences has shed light on the diverse modern drug delivery systems with smart characteristics, versatile functions, and modification possibilities. This review summarizes the current progress in various strategies for smart drug delivery systems against malignancies and introduces the representative endogenous and exogenous stimuli-responsive smart delivery systems. It may provide references for researchers in the fields of drug delivery, biomaterials, and nanotechnology.

关键词： Pharmaceutics Smart drugdelivery system Stimuli-responsive Receptor-ligand-based delivery Nano-drug delivery systems Precise therapy Toxicity Cancer

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

Cage slip characteristics of a cylindrical roller bearing with a trilobe-raceway

引用

Chinese Journal of Aeronautics 2018年第2期31卷 351-362页

作者： Sier DENG Yujia LU wenhu ZHANG Xue SUN Zhenwei LU School of Mechanical Engineering Henan University of Science and Technology Luoyang 471003 China Collaborative Innovation Center of Major Machine Manufacturing in Liaoning Dalian 116024 China Patent Examination Cooperation Center of the Patent Office SIPO Henan Zhengzhou 450002 China School of Mechanical Engineering Northwestern Polytechnical University Xi'an 710071 China Technology Center of luo YANG L YC BEARING CO. LTD Luoyang 471003 China

Based on dynamic analysis of rolling bearings, the nonlinear dynamic differential equations of a cylindrical roller bearing with a trilobe-raceway were established and solved by the GSTIFF（gear stiff） integer algorithm with a variable step. The influences of structural parameters and the tolerance of the trilobe-raceway, working conditions of the bearing, and the outer ring installation method on cage slip characteristics were investigated. The results show that：（i） The cage slip ratio and bearing rating life of a cylindrical roller bearing with a trilobe-raceway would reduce when the low-radius（radius of the outer raceway contour at the lowest point） and D-value（difference value between the high and low points of the outer raceway contour） decrease, and the former（low-radius） contributes more significantly.（ii） The cage slip ratio of a cylindrical roller bearing with a trilobe-raceway rises with the increase of the bearing speed, and decreases with the increase of the radial force; the variation range increases with the increase of the low-radius.（iii） When the installation angle of the outer ring increases in a period, the cage slip ratio remains unchanged while the bearing rating life rises up a little. Therefore, when installing a cylindrical roller bearing with a trilobe-raceway, the location of the maximum radius shall be under that of the radial force to improve the bearing rating life.（iv） With the increase of the roundness of the base circle where the radius of the lowest points of the trilobe-raceway contour locates, the cage slip ratio rises gradually and the bearing rating life decreases.

关键词： Bearing rating life Cage slip ratio Dynamics Raceway contour Trilobe-raceway

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

Advances of nanoparticles as drug delivery systems for disease diagnosis and treatment

引用

Chinese Chemical Letters 2023年第2期34卷 65-88页

作者： Rui Liu Cong luo Zhiqing Pang Jinming Zhang Shaobo Ruan Meiying Wu Lei Wang Tao Sun Nan Li Liang Han Jinjin Shi Yuanyu Huang Weisheng Guo Shaojun Peng wenhu Zhou Huile Gao Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China Department of Pharmaceutics Wuya College of InnovationShenyang Pharmaceutical UniversityShenyang 110016China Department of Pharmaceutics School of PharmacyFudan UniversityKey Laboratory of Smart Drug DeliveryMinistry of EducationShanghai 200433China State Key Laboratory of Southwestern Chinese Medicine Resources Pharmacy SchoolChengdu University of Traditional Chinese MedicineChengdu 611130China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China School of Pharmaceutical Sciences(Shenzhen) Sun Yat-sen UniversityShenzhen 518107China School of Pharmaceutical Sciences Zhengzhou UniversityKey Laboratory of Targeting Therapy and Diagnosis for Critical DiseasesZhengzhou 450001China Tianjin Key Laboratory of Drug Delivery&High-Efficiency School of Pharmaceutical Science and TechnologyTianjin UniversityTianjin 300072China Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences Soochow UniversitySuzhou 215123China Advanced Research Institute of Multidisciplinary Science School of Life ScienceKey Laboratory of Molecular Medicine and BiotherapyKey Laboratory of Medical Molecule Science and Pharmaceutics EngineeringBeijing Institute of TechnologyBeijing 100081China Radiology Center Key Laboratory of Molecular Target&Clinical PharmacologySchool of Pharmaceutical Sciences&The Second Affiliated HospitalGuangzhou Medical UniversityGuangzhou 510260China Zhuhai Institute of Translational Medicine Zhuhai People's Hospital(Zhuhai hospital affiliated with Jinan University)Zhuhai 519000China Xiangya School of Pharmaceutical Sciences Central South UniversityChangsha 410013China

Decades have passed since the first nanoparticles-base medicine was approved for human cancer treatment, and the research and development of nanoparticles for drug delivery are always ***, the significant advances complicate nanoparticles’ branches, including liposomes, solid lipid nanoparticles, inorganic nanoparticles, micelles, nanovaccines and nano-antibodies, etc. These nanoparticles show numerous capabilities in treatment and diagnosis of stubborn diseases like cancer and neurodegenerative diseases, emerging as novel drug carriers or therapeutic agents in future. In this review, the complicated branches of nanoparticles are classified and summarized, with their property and functions concluded. Besides, there are also some delivery strategies that make nanoparticles smarter and more efficient in drug delivery, and frontiers in these strategies are also summarized in this review. Except these excellent works in newly-produced drug delivery nanoparticles, some points of view and future expectations are made in the end.

关键词： Nanoparticles Drug delivery Nanomaterials Delivery strategies Specific delivery Disease diagnosis Disease treatment

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：