检索结果-南通市图书馆

维普期刊数据库

Influence of nano-mechanical evolution of Ti_(3)AlC_(2) ceramic on the arc erosion resistance of Ag-based composite electrical contact material

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2024年第2期13卷 176-188页

作者： Xuelian Wu Chengzhe Wu Xinpeng Wei Wanjie Sun Chengjian Ma Yundeng Zhang Gege Li Liming Chen dandan Wang Peigen Zhang Zhengming Sun Jianxiang Ding School of Materials Science and Engineering Anhui University of TechnologyMa’anshan 243032China Analytical and Testing Center Yancheng Institute of TechnologyYancheng 224051China School of Materials Science and Engineering Changzhou UniversityChangzhou 213164China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China

Al-containing MAX phase ceramic has demonstrated great potential in the field of high-performance low-voltage electrical contact *** the anti-arc erosion mechanism of the MAX phase is crucial for further improving performance,but it is not *** this study,Ag/Ti_(3)AlC_(2) electrical contact material was synthesized by powder metallurgy and examined by nanoindentation techniques such as constant loading rate indentation,creep testing,and continuous stiffness *** results indicated a gradual degradation in the nano-mechanical properties of the Ti_(3)AlC_(2) reinforcing phase with increasing arc erosion times,although the rate of this degradation appeared to decelerate over arc erosion ***,continuous stiffness measurements highlighted the uneven mechanical properties within Ti_(3)AlC_(2),attributing this heterogeneity to the phase’s *** the early(1-100 times)and intermediate(100-1000 times)stages of arc erosion,the decline in the nano-mechanical properties of Ti_(3)AlC_(2) was primarily ascribed to the decomposition of Ti_(3)AlC_(2) and limited surface *** the later stage of arc erosion(1000-6200 times),the inner region of Ti_(3)AlC_(2) also sustained arc damage,but a thick oxide layer formed on its surface,enhancing the mechanical properties and overall arc erosion resistance of the Ag/Ti_(3)AlC_(2).

关键词： MAX phase nano-mechanical properties decomposition surface oxidation anti-arc erosion mechanism

Observation of the Effectiveness of Rapid Recovery Nursing on Lung Cancer Surgery Patients and Its Impact on Sleep Quality

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 Cancer Therapy 2024年第2期15卷 29-32页

作者： Weiwei Chen dandan Liu Sun Yat-sen University Cancer Center Guangzhou China

Objective: To investigate the nursing effects of rapid recovery care measures on lung cancer surgery patients. Methods: 42 cases of lung cancer surgery patients were divided into control group and study group, with 21 cases in each group. The sleep quality and postoperative recovery indicators were compared between the two groups. Results: The study group showed better results than the control group in terms of PSQI scores, venting time, extubation time, time to getting out of bed, and duration of antibiotic use, with P Conclusion: Rapid recovery nursing has a positive impact on improving sleep quality and promoting postoperative recovery in lung cancer surgery patients.

关键词： Rapid Recovery Nursing Lung Cancer Surgery Sleep Quality

Fermi level tuning in Sn_(1-x)Pb_(x)Te/Pb heterostructure via changing interface roughness

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 118-125页

作者： Tengteng Liu Zhaoxia Yi Bangjin Xie Weiyan Zheng dandan Guan Shiyong Wang Hao Zheng Canhua Liu Hao Yang Yaoyi Li Jinfeng Jia Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Tsung-Dao Lee InstituteSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Shanghai Research Center for Quantum Sciences Shanghai 201315China Hefei National Laboratory Hefei 230088China

Superconducting SnTe-type topological crystalline insulators(TCIs)are predicted to host multiple Majorana zero modes(MZMs)which can coexist in a single *** level(FL)close to the Dirac points of topological surface states is helpful for detecting ***,the TCI SnTe is a heavily p-type semiconductor which is very difficult to modify to n-type via doping or *** this work,we fabricate the atomically flat Sn_(1-x)Pb_(x)Te/Pb heterostructure by molecular beam epitaxy,and make the p-type Sn_(1-x)Pb_(x)Te become n-type through changing the interface *** scanning tunnelling microscope,we find the Dirac points of Sn_(1-x)Pb_(x)Te/Pb heterostructure are always above the FL due to the Fermi level pinning(FLP)induced by topological surface states at atomically flat *** increasing the interface roughness,the FLP effect is suppressed and then the Dirac points of p-type Sn_(1-x)Pb_(x)Te can be tuned very close to or even below the *** work provides a new method for tuning the FL of SnTe-type TCI which has potential application in novel topological superconductor device.

关键词： topological crystalline insulator superconductor heterostructure Fermi level pinning interface roughness

维普期刊数据库

Taxonomic dependency and spatial heterogeneity in assembly mechanisms of bacteria across complex coastal waters

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2024年第1期13卷 80-97页

作者： Huizhen Yan dandan Lin Gaoke Gu Yujie Huang Xuya Hu Zhenhao Yu Dandi Hou Demin Zhang Barbara J.Campbell Kai Wang State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products School of Marine SciencesNingbo University Key Laboratory of Marine Biotechnology of Zhejiang Province School of Marine Sciences Ningbo University Department of Biological Sciences Clemson University

Background Understanding community assembly mechanisms across taxa and space is fundamental for microbial ecology. However, the variability and determinants of assembly processes over taxa and space remain unclear. Here, we investigated taxonomic dependency and spatial heterogeneity in bacterial assembly mechanisms across coastal waters in the East China Sea using neutral and null models with customized visualization *** Overall, bacterial assembly mechanisms varied across broad taxonomic groups(phyla and proteobacterial classes) and space at the regional scale. A determinism–stochasticity balanced mechanism governed total bacterial assembly, while taxonomic dependency existed in assembly mechanisms and ecological processes. Among community ecological features, niche breadth and negative-to-positive cohesion ratio were strongly associated with the determinism-to-stochasticity ratio of bacterial groups. Bacterial assembly mechanisms commonly exhibited spatial heterogeneity, the extent and determinants of which varied across taxonomic groups. Spatial assembly of total bacteria was directly driven by many environmental factors and potential interactions between taxa, but not directly by geographic factors. Overall, the bacterial groups with higher spatial heterogeneity in assembly mechanisms were more related to environmental and/or geographic factors(except Bacteroidetes), while those with lower heterogeneity were more related to ecological *** Our results confirm the pervasiveness of taxonomic dependency and spatial heterogeneity in bacterial assembly, providing a finer understanding about regulation across complex coastal waters.

关键词： Bacterioplankton Assembly mechanism Niche breadth Null model Environmental gradient Biogeography

Neuroinflammation attenuation effects by celastrol and PDIA3 in the amygdala, hippocampus and dorsal raphe nucleus of obese mice

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2024年第2期14卷 287-290页

作者： Chunyan Zhu Xuemin Yao dandan Liu Guoxin Zhang Yongping Zhu Hongyu Chi Shuangpan Zhang Jun Yang Ying Liu Jigang Wang Na Lin Institute of Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing100700China

Nowadays,roughly 603.7 million people are bothered by obesity[1].More seriously,obesity brings inflammation to the peripheral and central nervous system,which compromises the comorbidity of obesity,major depression[2],and cognitive deficits[3].Drug competent in the comorbidity is still *** 2015,Liu et al.[4]reported celastrol(CEL)as a powerful anti-obesity *** our previous study.

关键词： inflammation obesity obese

Etiological Analysis of 248 Cases of Oculomotor Nerve Palsy

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 Clinical and Nursing Research 2024年第7期8卷 287-290页

作者： Bo Xia dandan Zhao Hefei Southeast Eye Hospital Hefei 230000Anhui ProvinceChina Nanjing Southeast Eye Hospital Nanjing 210000Jiangsu ProvinceChina

Objective:To explore the main causes of oculomotor nerve palsy,providing a reference for clinical diagnosis and ***:A total of 248 patients with oculomotor nerve palsy treated in the hospital from January 2016 to January 2018 were selected,and their causes and treatments were ***:This study found that the main causes of oculomotor nerve palsy were intracranial aneurysms,brain stem lesions,and brain inflammation.A few cases were due to viral infections and congenital oculomotor nerve palsy,while some patients had unknown *** treatment in our hospital,most patients experienced relief,although 12 patients ***:The etiology of oculomotor nerve palsy is complex,and choosing appropriate drugs during treatment is *** identification of the cause is an effective method for treatment.

关键词： Oculomotor nerve palsy Etiology Analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

响应面法优化机械力辅助提取覆盆子多糖

中国食品添加剂 2022年第4期33卷 89-94页

作者：谢庭辉项丹丹张恩军李萌台州科技职业学院园艺植物研究所台州318020

为了探究覆盆子多糖的最佳提取工艺,在单因素试验的基础上,采用响应面法考察了机械力辅助下的球磨时间、球磨转速、球料比对覆盆子多糖得率的影响。结果显示:在球磨时间为9.0min,球磨转速为363r/min,球料比为298∶1,超声时间为20min,液... 详细信息

为了探究覆盆子多糖的最佳提取工艺,在单因素试验的基础上,采用响应面法考察了机械力辅助下的球磨时间、球磨转速、球料比对覆盆子多糖得率的影响。结果显示:在球磨时间为9.0min,球磨转速为363r/min,球料比为298∶1,超声时间为20min,液料比为30∶1的条件下,覆盆子多糖得率最高为11.05%。在超声提取、回流提取等4种提取方法对比中,机械力辅助乙醇提取所得多糖得率最高,该提取方式更为绿色、高效。本研究为覆盆子多糖的提取提供了新思路。

关键词：覆盆子多糖机械力辅助提取响应面

维普期刊数据库

General anesthetic agents induce neurotoxicity through astrocytes

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第6期19卷 1299-1307页

作者： Yanchang Yang Tiantian Liu Jun Li dandan Yan Yuhan Hu Pin Wu Fuquan Fang Patrick M.McQuillan Wenxin Hang Jianhang Leng Zhiyong Hu Department of Anesthesiology The First Affiliated Hospital Zhejiang University School of Medicine Department of Anesthesiology Ningbo Women and Children's Hospital 3. Department of Anesthesiology Shulan (Hangzhou) Hospital Affiliated to Zhejiang Shuren University Shulan International Medical College 4. Cell Biology Department Yale University 5. Department of Anesthesiology Penn State Hershey Medical Centre Penn State College of Medicine 6. Department of Central Laboratory Affiliated Hangzhou First People's Hospital Zhejiang University School of Medicine

Neuroscientists have recognized the importance of astrocytes in regulating neurological function and their influence on the release of glial transmitters. Few studies, however, have focused on the effects of general anesthetic agents on neuroglia or astrocytes. Astrocytes can also be an important target of general anesthetic agents as they exert not only sedative, analgesic, and amnesic effects but also mediate general anesthetic-induced neurotoxicity and postoperative cognitive dysfunction. Here, we analyzed recent advances in understanding the mechanism of general anesthetic agents on astrocytes, and found that exposure to general anesthetic agents will destroy the morphology and proliferation of astrocytes, in addition to acting on the receptors on their surface, which not only affect Ca2+signaling, inhibit the release of brain-derived neurotrophic factor and lactate from astrocytes, but are even involved in the regulation of the pro-and anti-inflammatory processes of astrocytes. These would obviously affect the communication between astrocytes as well as between astrocytes and neighboring neurons, other neuroglia, and vascular cells. In this review, we summarize how general anesthetic agents act on neurons via astrocytes, and explore potential mechanisms of action of general anesthetic agents on the nervous system. We hope that this review will provide a new direction for mitigating the neurotoxicity of general anesthetic agents.

关键词： astrocytes brain-derived neurotrophic factor general anesthetic agents neuron neurotoxicity N-methyl-D-aspartate receptor perioperative neurocognition Toll-like receptor γ-aminobutyric acid receptor

Diagnosis,Treatment,and Associated Factors Among Patients with HCV Infection—Jiangsu Province,China,2004–2020

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2024年第1期6卷 1-5,I0001-I0003页

作者： dandan Yang Jing Lu Zhi Zhang Chuanwu Sun Zhuping Xu Yao Qi XiaoXia Liu Huan Ding Feifei Chai Zhengdong Zhang Baoli Zhu Department of Genetic Toxicology The Key Laboratory of Modern Toxicology of Ministry of EducationCenter for Global HealthSchool of Public HealthNanjing Medical UniversityNanjing CityJiangsu ProvinceChina Department of Sexually Transmitted Diseases and AIDS Center for Disease Control and Prevention of Jiangsu ProvinceNanjing CityJiangsu ProvinceChina Department of Sexually Transmitted Diseases and AIDS Center for Disease Control and Prevention of XuzhouXuzhou CityJiangsu ProvinceChina Department of Sexually Transmitted Diseases and AIDS Center for Disease Control and Prevention of WuxiWuxi CityJiangsu ProvinceChina Department of Sexually Transmitted Diseases and AIDS Center for Disease Control and Prevention of YanchengYancheng CityJiangsu ProvinceChina Department of Sexually Transmitted Diseases and AIDS Center for Disease Control and Prevention of ZhenjiangZhenjiang CityJiangsu ProvinceChina.

What is already known on this topic?The global efforts to address the hepatitis C virus(HCV)are progressing,but there are still significant gaps in the diagnosis and treatment of HCV,leading to an increasing number of deaths related to *** is added by this report?An extensive investigation was conducted to assess HCV RNA diagnosis,treatment uptake,and associated factors among individuals infected with HCV within Jiangsu *** study encompassed a large geographical area and utilized a substantial sample *** are the implications for public health practice?Implementing focused interventions to improve the timely diagnosis of HCV RNA and increase the uptake of HCV treatment could effectively reduce the future burden of HCV-related health problems,deaths,and healthcare *** is essential for achieving the global target of eliminating hepatitis C.

关键词： diagnosis utilized Jiangsu