检索结果-南通市图书馆

Chinese Journal of Chemistry 2024年第1期42卷 43-47页

作者： Li Wang Renwei Xiao Jingyuan Song Long-Sheng Zheng Qiwei Lang Gen-Qiang Chen Xumu Zhang Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis Department of Chemistryand Medi-PingshanSouthern University of Science and TechnologyShenzhenGuangdong 518000China Academy for Advanced Interdisciplinary Studies Southern Universityof Science and TechnologyShenzhenGuangdong 518000China Chemistry and Chemical Engineering Guangdong Laboratory ShantouGuangdong 515031China

Transition metal-catalyzed asymmetric transfer hydrogenation has been proven to be a powerful approach for the synthesis of chiral ***,a highly efficient and enantioselective transfer hydrogenation of dibenzoheptaheterocyclic ketones catalyzed by an arene-tethered TsDPEN-based Rh(ll)catalyst has been successfully developed,and a variety of dibenzoheptaheterocyclic ketones were reduced by a 1/1 mixture of formic acid and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)with high yields and *** this method,the asymmetric reduction of 7,8-difluorodibenzo[b,e]thiepin-11(6H)-one has been realized,providing the key intermediate of baloxavir marboxil with>99% yield and>99% ee at a substrate/catalyst molar ratio of 1000.

关键词： Asymmetric transfer hydrogenation Baloxavir Chiral alcohol Enantioselectivity Heterocyclic diaryl ketone Rhodium(Ⅱ)

Attitudes towards acceptance of an innovative home-based and remote sensing rehabilitation protocol among cardiovascular patients in shantou, China

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 Geriatric Cardiology 2016年第4期13卷 326-332页

作者： Jia-Ying FANG Ji-Linm LI Zhong-Han LI Duan-Min XU Chang CHEN Bin XIE Helen CHEN William W AU Department of Preventive Medicine Shantou University Medical College Shantou China Department of Cardiology the First Affiliated Hospital of Shantou University Medical College Shantou China School of Public Health and Health Systems University of Waterloo Waterloo Canada

Background Cardiac rehabilitation （CR） protocols have diversified to include home-based cardiac tele-rehabilitation （HBCTR） as an alternative to hospital-based or center-based CR. To adopt the use of home-based cardiac tele-rehabilitation, it is necessary to assess cardiac patients＇ attitudes towards acceptance of such e-health technology, especially in China where knowledge of such technology is deficient. Methods Interviews were conducted in the First Affiliated Hospital of shantou university Medical College, shantou, China. After percutaneous coronary interventional （PCI） surgery, patients completed the survey. Results Among the 150 patients, only 13% had ever heard of HBCTR. After an introduction of our HBCTR program, 60% of patients were willing to participate in the program. From our multivariate analysis of questionnaire data, age （OR： 0.92, 95% CI： 0.864）.98; P = 0.007）, average family monthly income （OR： 0.13, 95% CI： 0.05-0.341 P 〈 0.001）, education level （OR： 0.24, 95% CI： 0.10-0.59; P = 0.002） and physical exercise time （OR： 0.19, 95% CI： 0.06-0.56; P = 0.003） were independent predictors for acceptance of HBCTR. From the reasons for participation, patients selected： enhanced safety and independ ence （28.3%）, ability to self-monitor physical conditions daily （25 A%）, and having automatic and emergency alert （23.1%）. Reasons for refusal were： too cumbersome operation （34.3%） and unnecessary protocol （19.4%）. Conclusions Most patients lacked knowledge about HBCTR but volunteered to participate after they have learned about the program. Several personal and life-style factors influenced their acceptance of the program. These indicate that both improvement of technology and better understanding of the program will enhance active participation.

关键词： Cardiac rehabilitation Mobile health Remote-sensing Tele-rehabilitation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

小鼠整胚石蜡切片制备方法的改进

汕头大学医学院学报 2024年第1期37卷 2-6页

作者：王雅楠叶艺新陈佩珊 Haibin Chen Department of Histology and Embryology Shantou University Medical CollegeShantou 515041China Department of Obstetrics and Gynecology The Second Affiliated Hospital of Shantou University Medical CollegeShantou 515041China.

Objective:The morphology analysis of whole-mount mouse embryos was observed using an improved paraffin section ***:Mouse embryos of varying embryonic ages were collected and whole-mount embryo paraffin sections were prepared using PFA-intravenously injected fixation,prolonged dehydration,and paraffin *** and eosin(H&E)staining and immunohistochemical staining were employed to evaluate the quality of sections,with different tissues being observed labeled by ***:Following a series of tissue processing and staining procedures,the structure of the whole-mount mouse embryo was well-preserved,and the staining was clear and easily *** of different embryonic ages were treated differently,yet the quality of tissue processing remained highly ***:Tissue processing and staining have been significantly improved,allowing for the easy acquisition of whole-mount mouse embryos of different ages through simplified methods of tissue fixation and dehydration *** staining results are clear and stable,providing technical support for the study of mouse embryo development.

关键词： whole-mount mouse embryo paraffin section morphological technique

Perfecting HER catalysts via defects:Recent advances and perspectives

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2024年第9期64卷 4-31页

作者： Chengguang Lang Yantong Xu Xiangdong Yao School of Advanced Energy and IGCME Sun Yat‐sen University(Shenzhen)Shenzhen 518107GuangdongChina Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515063GuangdongChina

Defect engineering has become a promising approach to improve the performance of hydrogen evolution reaction(HER)***-noble transition metal-based catalysts(TMCs)have shown significant promise as effective alternatives to traditional platinum-group catalysts,attracting considerable ***,the industrial application of TMCs in electrocatalytic hydrogen production necessitates further optimization to boost both catalytic activity and *** review comprehensively examines the types,fabrication methods,and characterization techniques of various defects that enhance catalytic HER *** advancements include optimizing defect concentration and distribution,coupling heteroatoms with vacancies,and leveraging the synergy between bond lengths and ***-depth discussions highlight the electronic structure and catalytic mechanisms elucidated through in-situ characterization and density functional theory ***,future directions are identified,exploring novel defect types,emphasizing precision synthesis methods,industrial-scale preparation techniques,and strategies to enhance structural stability and understanding the in-depth catalytic *** review aims to inspire further research and development in defect-engineered HER catalysts,providing pathways for high efficiency and cost-effectiveness in hydrogen production.

关键词： Defect Hydrogen evolution reaction Catalytic mechanism Synergistic catalysis Transition metal-based catalyst

Conceptual Analysis of Self-Management in Patients with Hypertension

在线全文

学校读者我要写书评

暂无评论

Journal of Clinical and Nursing Research 2024年第5期8卷 356-368页

作者： Li Yang Yutian Hao Liling Zhong Shilin Xu Saiqiong Zhong Yanying Lu Hui Liu The Fifth Affiliated Hospital Southern Medical UniversityGuangzhouGuangdong ProvinceChina Shenzhen Children’s Hospital ShenzhenGuangdong ProvinceChina The Guangzhou Red Cross Hospital GuangzhouGuangdong ProvinceChina The Second Affiliated Hospital of shantou university Medical College ShantouGuangdong ProvinceChina

Objective:To clarify the concept of self-management in hypertensive patients by analyzing the definition,attributes,and measurement tools through a literature ***:An Internet-based search of the databases was conducted using Academic Search Complete,Medical Line,CINAHL,Health Source:Nursing/Scholarly Edition,and Google *** the search process,keywords or free text were combined by using Boolean operators,with the search terms“self of management”or“self-management,”“concept*analysis”or“concept*definition,”and Walker and Avant’s concept analysis method was ***:Analysis of relevant literature summarized the conceptual attributes of self-management in hypertensive patients as the active participation of patients in the treatment process;the presence of interaction provided by patients and health care providers;the use of certain health management tools;and the aim of maintaining and improving the health status and living capacity of hypertensive ***:The concept of self-management for hypertensive patients was clarified,which helps to promote the application of hypertensive self-management in clinical work and improve outcomes and quality of life for patients with hypertension.

关键词： Hypertension Self-management Concept analysis Walker and Avant’s concept analysis method

Twin fetuses associated with double amniotic sacs diagnosed using transvaginal ultrasonography:A case report

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 Clinical Cases 2024年第18期12卷 3534-3538页

作者： Zheng-Qiao Liang Wen-Qing Ding Maternity and Child Longgang Maternity and Child Institute of Shantou University Medical CollegeShenzhen 518174Guangdong ProvinceChina

BACKGROUND Conjoined twins are a rare twin malformation commonly presenting as single amniotic sac twinning,with double amniotic sac twinning being extremely rare and poorly *** conjoined twins are *** SUMMARY A woman of childbearing age conceived naturally,and at 8 wk of gestation,transvaginal ultrasonography showed an embryo and cardiac tube pulsation in both amniotic *** dynamic observation,the two embryos were connected in the lower abdomen,with restricted movement.A repeat transvaginal ultrasound at 11 wk showed that the intestinal tubes of both fetuses were connected in the lower *** pregnancy was terminated and labor was *** Transvaginal ultrasound may detect conjoined twin malformations in an early *** case provides diagnostic insights for ultrasonographers and can help develop early therapeutic interventions.

关键词： Double amniotic sac Conjoined twins Yolk sac Transvaginal ultrasound Case report

Survey of cyanomyovirus abundance in shantou coastal waters by g20

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2015年第3期33卷 604-615页

作者：李传标丁俊周立镇张昭李升康刘文华温小波 Guangdong Provincial Key Laboratory of Marine Biology Shantou University Marine Biology Institute Shantou University

To understand the genetic diversity and population changes in cyanophages in the coastal waters of shantou, northeast South China Sea, we used the capsid assembly protein gene g20 as a marker of the abundance and phylogeny of natural cyanomyovirus communities. The abundance of total viruses, heterotrophic bacteria, and picophytoplankton in the coastal waters was monitored with flow cytometry. Hydrological parameters （NO3^-, NO2^-, NH3, soluble reactive phosphorus, total dissolved nitrogen, total dissolved phosphorus, dissolved oxygen, chemical oxygen demand, temperature, salinity, and chlorophyll a concentration） and microbial abundance （total viruses, total bacteria, Prochlorococcus, Synechococcus, and eukaryotes） were measured in the upper and lower layers at four sampling sites in the research area. In the direct viral counts, cyanomyoviruses accounted for 1.92% to 〉10% of the total viral community. A phylogenetic analysis showed that the g20 sequences in the shantou coastal waters were very diverse, distributed in eight distinct operational taxonomic units, including the newly formed Cluster W. The g20 gene copies inferred from real time PCR assay indicated that cyanomyovimses were correlated significantly with the heterotrophic bacteria numbers and the nitrate and chlorophyll a concentrations. These results suggest that cyanomyoviruses are ubiquitous and are an abundant component of the virioplankton in shantou coastal waters.

关键词： cyanomyovims g20 shantou coastal water

Designing Electrocatalysts for High-Current-Density Freshwater/Seawater Splitting

在线全文

学校读者我要写书评

暂无评论

Renewables 2024年第1期2卷 2-24页

作者： Madiha Rafiq Zanling Huang Chaoran Pi Liangsheng Hu Fushen Lu Kaifu Huo Paul KChu Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063 Wuhan National Laboratory for Optoelectronics(WNLO) School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074 Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515061 Research Institute of Huazhong university of Science and Technology in Shenzhen Shenzhen 518063 Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongKowloonHong KongChina

Electrocatalytic water splitting is crucial to renewable and clean hydrogen *** high efficiency and stability in hydrogen generation by freshwater/seawater electrolysis at a high current density(HCD)using low-cost electrode materials is of utmost importance for the future hydrogen ***,conventional freshwater/seawater electrolysis suffers from low current density due to inefficient electrocatalysts and competitive reactions of the chlorine evolution reaction(ClER),consequently hampering its industrial *** surface and interface engineering techniques are essential for the development of efficient and long-lasting electrodes for freshwater and seawater electrolysis at *** the review,we begin by discussing the fundamental aspects of freshwater/seawater splitting,focusing on recent advancements and strategies to increase the efficiency at *** then comprehensively discuss the rational design strategies for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)at HCD together with the associated fundamental electrode reactions by considering the thermodynamic and kinetic aspects of the catalytic efficiency,selectivity,and corrosion *** is followed by a discussion of some existing issues and limitations of HCD freshwater/seawater splitting and viable ***,the issues facing the field and possible future research directions for efficient large-scale industrial water splitting are discussed.

关键词： electrocatalytic water splitting HER OER high current density catalyst design strategy

Biomimetic leaf structures for ultra-thin electromagnetic wave absorption

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 4507-4516页

作者： Shikun Hou Ying Wang Feng Gao Fei Jin Benfeng Zhu Qiong Wu Hongliang Ge Zhihai Cao Hua Yang Magnetism Key Laboratory of Zhejiang Province&College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China Department of Materials Science and Engineering Guangdong Technion-Israel Institute of TechnologyShantou 515063China Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco-Dyeing&Finishing of Textiles Ministry of EducationZhejiang Sci-Tech UniversityHangzhou 310018China

Ultra-thin electromagnetic wave(EMW)absorbers present challenging demands on EMW absorption *** inspiration from heather leaf structures,this study introduces an innovative design strategy for EMW absorbing material,proposing biomimetic leaf SnO_(2) structures(bio-SnO_(2))on carbon fabric(CF).By employing leaf-shaped SnS2 as precursors,biomimetic leaf SnO_(2) nanostructures are constructed on CF surface after a simple thermal treatment,resulting in bio-SnO_(2)@CF *** results indicate that bio-SnO_(2)@CF exhibits an exceptional minimum reflection loss of-54.8 dB at an incredibly thin thickness of 1.2 *** cross section(RCS)simulations further validate the outstanding EMW attenuation ability of bio-SnO_(2)@CF,attaining a maximum RCS reduction value of 16.9 dBm^(2) at an incident wave angle ofθ=0°.This novel research showcases the biomimetic structural design strategy and its remarkable function in enhancing the EMW absorbing performance at ultra-thin absorber thickness.

关键词： biomimetic leaf structures electromagnetic wave absorption ultra-thin thickness

Ecophysiological characteristics of four intertidal marine macroalgae during emersion along shantou coast of China,with a special reference to the relationship of photosynthesis and CO_(2)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2005年第3期24卷 105-113页

作者： ZOUDinghui GAOKunshan MarineBiologyInstitute ScienceCenterShantouUniversityShantou515063China MarineBiologyInstitute ScienceCenterShantouUniversityShantou515063China／／InstituteofHydrobiologyChineseAcademyofSciencesWuhan430072China

Intertidal marine macroalgae experience periodical exposures during low tide due to their zonational distribution. The duration of such emersion leads to different exposures of the plants to light and aerial CO2, which then affect the physiology of them to different extents. The ecophysiological responses to light and CO2 were investigated during emersion in two red algae Gloiopeltis furcata and Gigartina intermedia, and two brown algae Petalonia fascia and Sargassum hemiphyllum, growing along the shantou coast of China. The light-saturated net photosynthesis in G. furcata and P. fascia showed an increase followed by slightly desiccation, whereas that in G. intermedia and S. hemiphyllumexhibited a continuous decrease with water loss. In addition, the upper-zonated G. furcata and P. fascia, exhibited higher photosynthetic tolerance to desiccation and required higher light level to saturate their photosynthesis than the lower-zonated G. intermedia and S. hemiphyllum. Desiccation had less effect on dark respiration in these four algae compared with photosynthesis. The light-saturated net photosynthesis increased with increased CO2 concentrations, being saturated at CO2 concentrations higher than the present atmospheric level in G. furcata, G. intermedia and S. hemiphyllum during emersion. It was evident that the relative enhancement of photosynthesis by elevated CO2 in those three algae increased, though the absolute values of photosynthetic enhancement owing to CO2 increase were reduced when the desiccation statuses became more severe. However, in the case of desiccated P. fascia (water loss being greater than 20 %), light saturated net photosynthesis was saturated with current ambient atmospheric CO2 level. It is proposed that increasing atmospheric CO2 will enhance the daily photosynthetic production in intertidal macroalgae by varied extents that were related to the species and zonation.

关键词： marine macroalgae ecophysiology photosynthesis CO2 zonation