检索结果-南通市图书馆

Science China Chemistry 2025年第1期68卷 257-263页

作者： Jiapian Huang Chenxin Wang Xu Wang Xiaoyu Zhou Wei Xiao Jie Wu school of pharmaceutical and Chemical Engineering&Institute for Advanced studies Taizhou UniversityTaizhou 318000China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China school of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

The generation of variousβ-chiral sulfones bearing chiral cyclic sulfinamides through photoredox-catalyzed sulfur dioxide insertion with asymmetric radical cyclization is *** method features a broad substrate scope and excellent *** studies reveal that the dispersion interaction between sulfinyl group and CH_(2)SO_(2)ph group plays a crucial role in the stereoselectivity control.

关键词： β-chiral sulfones chiral cyclic sulfinamides sulfur dioxide insertion asymmetric radical cyclization stereoselectivity

CHANGING PERCEPTIONS OF CHINESE PROdUCTS BY AMERICAN CONSUMERS

在线全文

学校读者我要写书评

暂无评论

管理工程学报 1989年第Z1期 52-56+64页

作者： James A.Brunner Anthony Koh The University of Toledo The University of Toledo ph.d. ph.d.

One of the primary objectives of the People's Republic of China (PRC) is an expansion of its foreign trade. To contribute to this objective, it is essential that effective marketing strategies be developed incorporating all elements of the marketing mix, one of the most important being the Produts. Earlier studies indicate that consumers tend to stereotype Products by the country of origin and therefore assume that goods from that country are of similar quality even though they may be familiar with only a limited variety of that country's Products.

关键词： PRC 管理工程学产业工程学 CHANGING PERCEPTIONS OF CHINESE PROdUCTS BY AMERICAN CONSUMERS TOTAL 商品

High-throughput screening and evaluation of double-linker metal–organic frameworks for CO_(2)/H_(2)adsorption and separation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese physics B 2025年第2期34卷 408-417页

作者： Ji-Long Huang Xiu-Ying Liu Hao Chen Xiao-dong Li Jing-Xin Yu school of physics Henan University of TechnologyZhengzhou 450001China R&d Center for Advanced Energy Materials Henan University of TechnologyZhengzhou 450001China

The capture of CO_(2)from CO_(2)/H_(2)gas mixtures in syngas is a crucial issue for hydrogen production from steam methane reforming in industry,as the presence of CO_(2)directly affects the purity of H_(2).A combination of a high-throughput screening method and grand canonical Monte Carlo simulation was utilized to evaluate and screen 1725 metal–organic frameworks(MOFs)in detail as a means of determining their adsorption performance for CO_(2)/H_(2)gas *** adsorption and separation performance of double-linker MOFs was comprehensively evaluated using eight evaluation indicators,namely,the largest cavity diameter,accessible surface area,pore occupied accessible volume,porosity,adsorption selectivity,working capacity,adsorbent performance score and percent *** optimal performance frameworks were screened to further study their single-component adsorption and binary competitive adsorption of CO_(2)/H_(2)*** CO_(2)adsorption selectivity at different CO_(2)/H_(2)feed ratios was also evaluated,which indicated their excellent adsorption and separation *** microscopic adsorption mechanisms for CO_(2)and H_(2)at the molecular level were investigated by analyzing the radial distribution function and density *** study may provide directional guidance and reference for subsequent experiments on the adsorption and separation of CO_(2)/H_(2).

关键词： metal–organic framework adsorption separation high-throughput screening grand canonical Monte Carlo simulation

Attention-deficit/hyperactivity disorder and suicide:A systematic review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2017年第1期7卷 44-59页

作者： Judit Balazs Agnes Kereszteny Vadaskert Child and Adolescent Psychiatry Hospital Institute of Psychology Eotvos Loránd University school of ph.d. studies Semmelweis University

AIM To investigate suicidality and attention-deficit/hyperactivity disorder(AdHd), this paper aims to systematically review the literature as an extension of previous *** We searched five databases(Ovid MEdLINE, Psychinfo, PubM ed, Scopus, Web of Science) with two categories of search terms:(1) suicide; suicidal; suicide behavior; suicide attempt; suicidal thought; and(2) AdHd. RESULTS The search resulted 26 articles. There is a positive association between AdHd and suicidality in both sexes and in all age groups. Comorbid disorders mediate between suicidality and AdHd. CONCLUSION Recognizing AdHd, comorbid conditions and suicidality is important in prevention.

关键词： Attention-deficit/hyperactivity disorder Suicide Systematic review

Effect of humic acids and sunlight on the cytotoxicity of engineered zinc oxide and titanium dioxide nanoparticles to a river bacterial assemblage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2013年第9期25卷 1925-1935页

作者： Thabitha P.dasari Huey-Min Hwang Environmental Science ph.d. Program Jackson State University department of Biology Jackson State University

The effect of a terrestrial humic acid （HA） and Suwannee River HA on the cytotoxicity of engineered zinc oxide nanoparticles （ZnONPs） and titanium dioxide nanoparticles （TiO2NPs） to natural aquatic bacterial assemblages was measured with spread plate counting. The effect of HA （10 and 40 ppm） on the cytotoxicity of ZnONPs and TiO2NPs was tested factorially in the presence and absence of natural sunlight （light irradiation （LI））. The experiment was of full factorial, completely randomized design and the results were analyzed using the General Linear Model in SAS analytical software. The method of least squares means was used to separate the means or combinations of means. We determined the mechanism of toxicity via measurements of oxidative stress and metal ions. The toxicity of ZnONPs and TiO2NPs to natural aquatic bacterial assemblages appears to be concentration dependent. Moreover, the cytotoxicity of ZnONPs and TiO2NPs appeared to be affected by HA concentration, the presence of sunlight irradiation, and the dynamic multiple interactions among these factors. With respect to light versus darkness in the control group, the data indicate that bacterial viability was inhibited more in the light exposure than in the darkness exposure. The same was true in the HA treatment groups. With respect to terrestrial versus Suwanee River HA for a given nanoparticle, in light versus darkness, bacterial viability was more inhibited in the light treatment groups containing the terrestrial HA than in those containing Suwanee River HA. differences in the extent of reactive oxygen species formation, adsorption/binding of ZnONPs/TiO2NPs by HA, and the levels of free metal ions were speculated to account for the observed cytotoxicity. TEM images indicate the attachment and binding of the tested nanoparticles to natural bacterial assemblages. Besides the individual parameter, significant effects on bacterial viability count were also observed in the following combined treatments： HA-Zn

关键词： natural bacterial assemblages humic acid median lethal concentration (LC50 ) reactive oxygen species

AN EXAMINATION OF LEGAL REGULATIONS FOR INSIdER dEALING IN THE UK ANd THE LESSONS FOR CHINA

在线全文

学校读者我要写书评

暂无评论

Frontiers of Law in China-Selected Publications from Chinese Universities 2017年第4期12卷 524-560页

作者： ZHENG Weiwei ph.d. School of Law Jilin University of China Changchun China

The UK＇s position as a leading international financial center depends not only on the openness and competitiveness of its market, but also on its reputation as a clean and fair place to do business. Market confidence will be undermined where participants and users believe markets are susceptible to abuse. Thus, the main convincing justification for controlling insider＇s abuse of power is based on the harm principle, which it causes to investor confidence and securities markets. An insider ought not to be able to take advantage of his position either to breach a confidence or to achieve an unfair advantage in the market place; particularly the market place should, as far as possible, provide equality of opportunity to people entering it. Insider dealing has been regulated by the criminal law involved under Part V of the Criminal Justice Act 1993 in the UK. It has become clear that the traditional criminal penalty was limited by the criminal standard of proof required, while self-regulatory regimes are thought as toothless tigers. Although various potential common law civil remedies for breach of fiduciary duty and breach of confidence relating to insider dealing do exist, they are ineffective remedies and beset by so many complexities. As a response, the Financial Services and Markets Act 2000 came into force and marked an important development in the regulation of market abuse in creating civil penalties, which also contained misuse of confidential insider information. Later, the main substantive changes to existing civil market abuse regime have been taken effect within the Financial Services and Markets Act 2000 （Market Abuse） Regulations 2005, 2011 and 2014. Regarding to the regulatory framework, the range of regulatory powers of the Financial Services Authority, which has been replaced by the Financial Conduct Authority in April 1, 2013, available in combating market abuse is one of the most fundamental innovations of the FSMA 2000 and plays a significant role i

关键词： insider dealing criminal prosecution civil penalty regulatory sanction marketabuse

Isospin splitting of the dirac mass probed using the relativistic Brueckner-Hartree-Fock theory

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2025年第2期36卷 123-130页

作者： Pianpian Qin Qiang Zhao Hui Tong Chencan Wang Sibo Wang department of physics and Chongqing Key Laboratory for Strongly Coupled physics Chongqing UniversityChongqing 401331China Center for Exotic Nuclear studies Institute for Basic ScienceDaejeon 34126Korea Helmholtz-Institut für Strahlen-und Kernphysik and Bethe Center for Theoretical physics Universität BonnBonn D-53115Germany school of physics and Astronomy Sun Yat-Sen UniversityZhuhai 519082China

The isospin splitting of the dirac mass obtained using the relativistic Brueckner-Hartree-Fock(RBHF)theory was thor-oughly *** the perspective in the full dirac space,the long-standing controversy between the momentum-independent approximation(MIA)method and the projection method on the isospin splitting of the dirac mass in asymmetric nuclear matter was analyzed in *** found that the assumption procedure of the MIA method,which assumes that single-particle potentials are momentum independent,is not a sufficient condition that directly leads to the opposite sign of the isospin splitting of the dirac mass,whereas the extraction procedure of the MIA method,which extracts single-particle potentials from single-particle potential energy,changes the sign.A formal expression of the dirac mass was obtained by approximately solving a set of equations involved in the extraction *** opposite isospin splitting of the dirac mass was mainly caused by the extraction procedure,which forcibly assumed that the momentum dependence of the single-particle potential energy was in a quadratic form,in which the strength was solely determined by a constant scalar *** understanding of the isospin splitting of the dirac mass from ab initio calculations could enhance our knowledge of neutron-rich systems,such as exotic nuclei and neutron stars.

关键词： dirac mass Relativistic Brueckner-Hartree-Fock theory Single-particle potential Momentum dependence

Evaluation of fire smoke control in underground space

在线全文

学校读者我要写书评

暂无评论

Underground Space 2022年第3期7卷 295-310页

作者： Anastasios Kallianiotis despina Papakonstantinou Ilias CTolias Andreas Benardos Mining Engineer Ph.D.School of Mining&Metallurgical EngineeringNational Technical University of AthensGreece Mineral Resources Engineer Ph.D.CandidateSchool of Mining&Metallurgical EngineeringNational Technical University of AthensGreece Mechanical Engineer Ph.D.National Centre for Scientific Research“Demokritos”Greece Assistant Professor School of Mining and Metallurgical EngineeringTechnical University of AthensGreece

The main goal of the fire management strategy is to avoid people interaction with fire hazards,therefore several studies are carried out for optimal escape route planning as well as smoke management and mechanical ventilation *** spaces are a special case of study due to their technical characteristics that create different fire spread conditions compared to conventional *** this paper,a comparative study on the fire smoke propagation is carried out taking into account the use and performance of smoke mitiga-tion *** Underground Hazardous Waste Management Repository of Lavrion Technological and Cultural Park in Greece,is selected as a case study to achieve the paper objectives.A Computer Fluid dynamic software is used to simulate various fire scenarios based on the specific characteristics of the underground *** that have significant impact on evacuation procedure and human health such as visibility and carbon monoxide concentration are ***,the results are presented and an evaluation method is proposed based on evacuation simulation results,in order to predict the impact of the smoke control design on the conditions inside the underground *** results reveal that the ventilation shaft(passive system)offers an effective smoke control without any other combined control system and that the installation of smoke curtains,which are activated on time,offers significant improvement on smoke spread control extending the available egress time(ASET)in case of fire.

关键词： Fire smoke mitigation Underground space safety Personnel safety

Multifaceted superoxide dismutase 1 expression in amyotrophic lateral sclerosis patients:a rare occurrence?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第1期20卷 130-138页

作者： Ilaria Martinelli Jessica Mandrioli Andrea Ghezzi Elisabetta Zucchi Giulia Gianferrari Cecilia Simonini Francesco Cavallieri Franco Valzania department of Neurosciences Azienda Ospedaliero Universitaria di ModenaModenaItaly Clinical and Experimental Medicine ph.d.Program University of Modena and Reggio EmiliaModenaItaly department of Biomedical Metabolic and Neural SciencesUniversity of Modena and Reggio EmiliaModenaItaly Neurology Unit Neuromotor&Rehabilitation DepartmentAzienda USL-IRCCS di Reggio EmiliaReggio EmiliaItaly

Amyotrophic lateral sclerosis(ALS)is a neuromuscular condition resulting from the progressive degeneration of motor neurons in the cortex,brainstem,and spinal *** the typical clinical phenotype of ALS involves both upper and lower motor neurons,human and animal studies over the years have highlighted the potential spread to other motor and non-motor regions,expanding the phenotype of *** superoxide dismutase 1(SOd1)mutations represent a minority of ALS cases,the SOd1 gene remains a milestone in ALS research as it represents the first genetic target for personalized *** numerous single case reports or case series exhibiting extramotor symptoms in patients with ALS mutations in SOd1(SOd1-ALS),no studies have comprehensively explored the full spectrum of extramotor neurological manifestations in this *** this narrative review,we analyze and discuss the available literature on extrapyramidal and non-motor features during *** multifaceted expression of SOd1 could deepen our understanding of the pathogenic mechanisms,pointing towards a multidisciplinary approach for affected patients in light of new therapeutic strategies for SOd1-ALS.

关键词： amyotrophic lateral sclerosis(ALS) autonomic extramotor genotype-phenotype multisystem involvement Parkinson’s disease sensory SOd1 superoxide dismutase 1 urinary vocal cord palsy

Antiplane response of isosceles triangular hill to incident SH waves

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2005年第1期4卷 37-46页

作者：邱发强刘殿魁 school of Civil Engineering Harbin Engineering University Harbin 150001 ChinaPh.D.Candidate school of Civil Engineering Harbin Engineering University Harbin 150001 China Professor

In this paper, antiplane response of an isosceles triangular hill to incident SH waves is studied based on the method of complex function and by using moving coordinate system. The standing wave function, which can satisfy the governing equation and boundary condition, is provided. Furthermore, numerical examples are presented; the influences of wave number and angle of the incident waves and the angle of the hill’s peak on ground motion are discussed.

关键词： Boundary conditions Function evaluation Mathematical models Problem solving Scattering Stiffness Stresses Surfaces Complex functions Isosceles triangular hill Moving coordinate system Scattering of SH waves