检索结果-南通市图书馆

Chinese Journal of Structural Chemistry 2019年第3期38卷 429-433页

作者： LI Ying HAN Fang-wai XU Zi-yang WANG Ru yan Chen-Xin OU You-Jing LU Qian LIU Gui-yan ZENG Yong-Fei Tianjin Key Laboratory of Structure and Performance for Functional Molecules Key Laboratory of Inorganic-organic Hybrid Functional Material Chemistry (Tianjin Normal University) Ministry of Education College of Chemistry Tianjin Normal University

A new Pd-PEPPSI complex(2) with the bromo groups on the para-positions of N-aryl moieties of NHC has been synthesized and characterized by NMR and X-ray single-crystal diffraction. Complex 2 crystallizes in monoclinic, space group P2_1/c with a = 11.8790(8), b = 14.3038(10), c = 15.9905(11) ?, β = 101.291(2)°, V = 2664.4(3) ?3, Z = 4, D_c = 1.722 Mg/m^3, μ = 3.913 mm^(-1), F(000) = 1352, the final R = 0.0682 and wR = 0.1914 for 15113 observed reflections(I > 2σ(I)), R(all data) = 0.0970, w R(all data) = 0.2115, completeness to theta of 25.00 is 100.0% and GOOF = 1.035. Influenced by the electron-withdrawing bromo groups, the Pd-PEPPSI complex(2) showed high catalytic activity for the Suzuki-Miyaura cross-coupling reactions of aryl chlorides and arylboronic acids with a low catalyst loading(0.05 mol%) at room temperature in air.

关键词： Pd-PEPPSI complex crystal structure catalytic activity Suzuki-Miyaura cross-coupling aryl chlorides

2D materials for conducting holes from grain boundaries in perovskite solar cells

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

Light(Science & Applications) 2021年第4期10卷 695-706页

作者： Peng You Guanqi Tang Jiupeng Cao Dong Shen Tsz-wai Ng Zafer Hawash Naixiang Wang Chun-Ki Liu Wei Lu Qidong Tai Yabing Qi Chun-Sing Lee Feng yan Departm ent of Applied Physics The Hong Kong Polytechnic UniversityHung HornKowloonHong KongChina College of New Materials and New Energies Shenzhen Technology University518118 ShenzhenChina Center of Super-Diamond and Advanced Films(COSDAF) Department of ChemistryCity University of Hong KongHong KongChina Energy Materials and Surface Sciences Unit(EMSSU) Okinawa Institute of Science and Technology Graduate University(OIST)1919-1 TanchaOnna-sonOkinawa 904-0495Japan University Research Facility in Materials Characterization and Device Fabrication The Hong Kong Polytechnic UniversityHung HornKowloonHong KongChina

Grain boundaries in organic-inorganic halide perovskite solar cells(PSCs)have been found to be detrimental to the photovoltaic performance of ***,we develop a unique approach to overcome this problem by modifying the edges of perovskite grain boundaries with flakes of high-mobility two-dimensional(2D)materials via a convenient solution process.A synergistic effect between the 2D flakes and perovskite grain boundaries is observed for the first time,which can significantly enhance the performance of *** find that the 2D flakes can conduct holes from the grain boundaries to the hole transport layers in PSCs,thereby making hole channels in the grain boundaries of the ***,2D flakes with high carrier mobilities and short distances to grain boundaries can induce a more pronounced performance enhancement of the *** work presents a cost-effective strategy for improving the performance of PSCs by using high-mobility 2D materials.

关键词： materials. process. perovskite

Pathogenic TDRD12 variants cause defective piRNA pathway and male infertility in humans and mice

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 Genetics and Genomics 2024年第11期51卷 1322-1326页

作者： Ziyou Bao yan Wang Renxue Wang Fan Dong Tongtong Li wai-Yee Chan Zi-Jiang Chen Gang Lu Hongbin Liu Xiangfeng Chen State Key Laboratory of Reproductive Medicine and Offspring Health Center for Reproductive MedicineInstitute of WomenChildren and Reproductive HealthShandong UniversityJinanShandong 250012China National Research Center for Assisted Reproductive Technology and Reproductive Genetics Shandong UniversityJinanShandong 250012China Key Laboratory of Reproductive Endocrinology(Shandong University) Ministry of EducationJinanShandong 250012China Shandong Technology Innovation Center for Reproductive Health JinanShandong 250012China Shandong Provincial Clinical Research Center for Reproductive Health JinanShandong 250012China Shandong Key Laboratory of Reproductive Medicine Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandong 250012China Research Unit of Gametogenesis and Health of ART-Offspring Chinese Academy of Medical Sciences(No.2021RU001)JinanShandong 250012China Department of Reproductive Medicine Ren Ji HospitalShanghai Jiao Tong University School of MedicineShanghai 200000China Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics Shanghai 200000China CUHK-SDU Joint Laboratory on Reproductive Genetics School of Biomedical Sciencesthe Chinese University of Hong KongHong KongChina Advanced Medical Research Institute Cheeloo College of MedicineShandong UniversityJinanShandong 250012China

Non-obstructive azoospermia(NOA),the lack of sperm in the ejaculate due to failure of spermatogenesis,can result from a variety of diverse factors,with genetic factors accounting for~30%of NOA cases,including chromosomal aberrations,Y-chromosome microdeletions,and monogenic variants(Tang et al.,2022).More than 2000genes are known to participate in spermatogenesis,and>400 genes specifically linked to azoospermia have been identified through studies in mouse models(Krausz and Riera-Escamilla,2018).However,relatively few genes associated with azoospermia in mice have been verified in humans.

关键词： variants TDR

The Effectiveness of Virtual Reality-Based Simulation in Health Professions Education Relating to Mental Illness: A Literature Review

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

Health 2019年第6期11卷 646-660页

作者： wai Hin Wan Angie Ho yan Lam School of Public Health The University of Hong Kong Hong Kong China School of Nursing The University of Hong Kong Hong Kong China

The proliferation of Virtual Reality-based tools has led to its increased usage in the field of education over the last decades owing to its increasingly realistic simulation and greater control over the 3D simulated environment. The unique features of Virtual Reality (VR) simulation can provide learners with a hazard-free simulated environment allowing limitless failure attempts. Yet, good quality research to verify the effectiveness of VR simulation in training students of the health profession is still lacking. This literature review focuses on the effectiveness of virtual reality-based simulation in enhancing health profession students’ empathetic attitude relating to mental illness. Four databases were searched from January 1, 2007 to December 31, 2018. Of 1034 articles identified eligible in the databases, a total of 6 articles have met the criteria for inclusion in this review. Findings suggested that there is a clear relationship between VR simulation and an improvement on users’ empathy, attitudes, and knowledge relating to mental Illness. With the unique characteristic of experiential learning of VR simulation, there is a potential development of the VR simulation on empathy and attitude in healthcare education. Also, VR stimulation is found having a larger impact on the users’ empathy of users with a healthcare background compared to those without. Future studies should include more in-depth examination on the effect on the specificity of empathy and attitude of people with healthcare background, and in teaching a wider range of mental illnesses such as depression and general anxiety disorder.

关键词： VR Simulation Health Professions Education Mental Illness Virtual Reality Exposure

Photothermal-controlled sustainable degradation of protective coating modified Mg alloy using near-infrared light

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2021年第9期40卷 2538-2551页

作者： Zhi-Xin Han Xiang-Mei Liu Lei Tan Zhao-yang Li Yu-Feng Zheng Kelvin wai-Kwok Yeung Zhen-Duo Cui yan-Qin Liang Sheng-Li Zhu Shui-Lin Wu Hubei Key Laboratory of Polymer Materials Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan 430062China The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China School of Materials Science&EngineeringTianjin UniversityTianjin 300072China State Key Laboratory for Turbulence and Complex System Department of Materials Science and EngineeringCollege of EngineeringPeking UniversityBeijing 100871China Department of Orthopaedics and Traumatology Li Ka Shing Faculty of MedicineThe University of Hong KongPokfulam 999077Hong KongChina

Controlling the corrosion rate is critical for practical applications of Mg-based alloys. In this work, we constructed a protective coating of hybrid polycaprolactone(H-PCL)/indocyanine green(ICG) on AZ31 Mg alloy,whose degradation rate was controlled by 808-nm nearinfrared(NIR) light irradiation. The corrosion behaviors of H-PCL/ICG coated Mg alloys were systematically investigated by potentiodynamic polarization tests, electrochemical impedance spectroscopy(EIS) and hydrogen evolution experiments. The results disclosed that the H-PCL/ICG composite coating could effectively protect Mg alloy from corroding without NIR light irradiation. In contrast, under 808-nm NIR light irradiation, the corrosion resistance of this composite coating was decreased significantly, i.e., the corrosion current density(i_(corr))increasedfrom(8.81 ± 1.068) 9 10^(-8) to(1.22 ± 0.545) 9 10^(-6) A·cm^(-2). This is because the component of ICG in the coating was excited to produce heat locally, which triggered the glass transition temperature(T_(g)) of H-PCL in the coating, resulting in the motion of the molecular chain segment. Consequently, the electrolytes penetrated the coating and corroded the Mg substrate. In vitro biological experiment indicated that the synthesized coating exhibited good ***, these findings will provide a new strategy for designing novel photoresponsive coatings to remotely adjust the degradation rate of biodegradable metals for biomedical applications.

关键词： Magnesium Corrosion Coating Photoresponsive Surface modification

Stroke care in the ChatGPT era:Potential use in early symptom recognition

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

Journal of Acute Disease 2023年第3期12卷 129-130,I0001,I0002页

作者： wai yan Lam Sunny Chi Lik Au Department Ophthalmology Grantham HospitalHong KongChina Department Ophthalmology Tung Wah Eastern HospitalHong KongChina

Dear editor,Generative Pre-trained Transformer-based Chatbot(ChatGPT)[1]or similar natural language processing[2]and large language models[3]are artificial intelligence systems designed to understand and respond to human languages,allowing them to provide information,answer questions,and provide guidance on a wide range of *** of their key benefits is immediate access to information in a conversational format,as if a hotline call,which is essential in acute medical ***,medical utilization of ChatGPT is a hot research *** its intrinsic difference from search engines,ChatGPT has the potential to revolutionize our mode of information access.

关键词： conversational editor Chat

3D printing for ultra-precision machining:current status,opportunities,and future perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2024年第4期19卷 1-28页

作者： Tao HE wai Sze YIP Edward Hengzhou yan Jiuxing TANG Muhammad REHAN Long TENG Chi Ho WONG Linhe SUN Baolong ZHANG Feng GUO Shaohe ZHANG Suet TO State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong KongChina Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong KongChina Department of Physics The Hong Kong University of Science and TechnologyHong KongChina School of Geosciences and Info-Physics Central South UniversityChangsha 410083China

Additive manufacturing,particularly 3D printing,has revolutionized the manufacturing industry by allowing the production of complex and intricate parts at a lower cost and with greater ***,3D-printed parts frequently require post-processing or integration with other machining technologies to achieve the desired surface finish,accuracy,and mechanical ***-precision machining(UPM)is a potential machining technology that addresses these challenges by enabling high surface quality,accuracy,and repeatability in 3D-printed *** study provides an overview of the current state of UPM for 3D printing,including the current UPM and 3D printing stages,and the application of UPM to 3D *** the presentation of current stage perspectives,this study presents a detailed discussion of the benefits of combining UPM with 3D printing and the opportunities for leveraging UPM on 3D printing or supporting each *** particular,future opportunities focus on cutting tools manufactured via 3D printing for UPM,UPM of 3D-printed components for real-world applications,and post-machining of 3D-printed ***,future prospects for integrating the two advanced manufacturing technologies into potential industries are *** study concludes that UPM is a promising technology for 3D-printed components,exhibiting the potential to improve the functionality and performance of 3D-printed products in various *** also discusses how UPM and 3D printing can complement each other.

关键词： ultra-precision machining 3D printing additive manufacturing future perspectives start-of-the-art-review

Vertical transmission of hepatitis C virus: Current knowledge and perspectives

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 Hepatology 2014年第9期6卷 643-651页

作者： Chun-yan Yeung Hung-Chang Lee wai-Tao Chan Chun-Bin Jiang Szu-Wen Chang Chih-Kuang Chuang Department of Medicine Mackay Medical College Division of Gastroenterology and Nutrition Department of PediatricsMackay Memorial Hospital Institute of Biotechnology and Department of Chemical Engineering National Taipei Uni-versity of Technology Department of Pediatrics Taipei Medical University Department of Nursing Mackay Junior College of MedicineNursing and Management Department of Medical Research Mackay Memorial Hospital College of Medicine Fu-Jen Catholic University

Hepatitis C virus(HCV) infection is a major global health *** by the HCV can cause acute and chronic liver diseases and may lead to cirrhosis,hepatocellular carcinoma or liver *** World Health Organization estimates that approximately 3% of the world population have been infected with HCVand the worldwide prevalence is between 1% and 8% in pregnant women and between 0.05% and 5% in *** the introduction of blood product screening,vertical transmission becomes the leading cause of childhood HCV *** prevalence of pediatric HCV infection varies from 0.05% to 0.36% in developed countries and between 1.8% and 5% in the developing *** children born to women with antiHCV antibodies should be checked for HCV *** universal screening is controversial,selective antenatal HCV screening on high-risk populations is highly recommended and should be tested *** risk factors were shown to increase the possibility of HCV vertical transmission,including coinfections with human immunodeficiency virus,intravenous drug use and elevated maternal HCV viral load,while breastfeeding and HCV genotypes have been studied to have little *** present,no clinical intervention has been clearly studied and proved to reduce the HCV vertical transmission *** section should not be recommended as a procedure to prevent vertical transmission,however,breastfeeding is generally not *** high prevalence of global HCV infection necessitates renewed efforts in primary prevention,including vaccine development,as well as new approaches to reduce the burden of chronic liver *** researches should focus on the interruption of vertical transmission,developments of HCV vaccine and directacting antivirals in infancy and early childhood.

关键词： Hepatitis C virus Vertical transmission Perinatal infection Chronic liver disease

Develop a Participatory Model in Nutrition Education to Prevent Childhood Obesity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Health 2015年第4期7卷 466-475页

作者： Louisa Ming yan Chung Joanne wai Yee Chung Department of Health and Physical Education The Hong Kong Institute of Education Hong Kong China

Purpose: To investigate the effect of nutrition education and the engagement of students, parents and teachers in addressing school-specific environmental influences in eating problem. Design: This study adopted the action research process of diagnosing, action planning, taking action, evaluating, and specifying learning. Each of obese and non-obese male and female students was randomly selected based on physical screening based on obesity criteria. Dietary intake records were taken over seven days as the pre-intervention period. These four students, one of each of their parents and the teacher from the primary school, were given 3 sessions of nutrition education. After the nutrition education, dietary intake records were taken over the subsequent 7 days as the post-intervention period. Lunch observation and lunch menu review were included to identify eating problem of primary school children in school level. Findings: Students were found to consume less whole grains and more food items belonged to the “limited” and “strongly discouraged” as set in government lunch guidelines. Students’ dietary intakes before and after the nutrition education were found improved in their energy intake (p = 0.012), total fat, saturated fat, calcium, sodium, and cholesterol. Conclusion: A participatory model in elementary nutrition education could be effective.

关键词： Action Research Nutrition Education Childhood Obesity A Participatory Model