检索结果-南通市图书馆

Nano Research 2021年第11期14卷 3756-3772页

作者： sami Ullah Xiaoqin Yang Huy Q.ta Maria Hasan Alicja Bachmatiuk Klaudia tokarska Barbara trzebicka Lei Fu Mark H.Rummeli College of Energy Soochow Institute for Energy and Materials InnovationsKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou215006China School of Energy and Power Engineering Xi’an Jiaotong UniversityXi’an710049China Institute for Complex Materials IFW Dresden20 Helmholtz StrasseDresden01069Germany NUtECH School of Applied Sciences&Humanities and Computer Engineering DepartmentNational University of TechnologyIslamabad42000Pakistan Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie-Sklodowskiej 34Zabrze41-819Poland College of Chemistry and Molecular Science Wuhan UniversityWuhan430072China Institute of Environmental technology VŠB-Technical University of Ostrava17.listopadu 15Ostrava70833Czech Republic

Graphene is a material with unique properties that can be exploited in electronics, catalysis, energy, and bio-related fields. Although, for maximal utilization of this material, high-quality graphene is required at both the growth process and after transfer of the graphene film to the application-compatible substrate. Chemical vapor deposition (CVD) is an important method for growing high-quality graphene on non-technological substrates (as, metal substrates, e.g., copper foil). thus, there are also considerable efforts toward the efficient and non-damaging transfer of quality of graphene on to technologically relevant materials and systems. In this review article, a range of graphene current transfer techniques are reviewed from the standpoint of their impact on contamination control and structural integrity preservation of the as-produced graphene. In addition, their scalability, cost- and time-effectiveness are discussed. We summarize with a perspective on the transfer challenges, alternative options and future developments toward graphene technology.

关键词： high-quality transfer application-compatible substrate graphene technology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Actual Practical Attitude and Knowledge of Dental Implants among Senior Dental Students and General Dentists Graduated from Some Saudi and Non-Saudi Dental Schools

引用

International Journal of Clinical Medicine 2023年第1期14卷 1-19页

作者： Mohammed M. A. Abdullah Al-Abdaly sami Yahya Alamri Ghadeer Mohammed Mohammed Al-Abdaly Ayed Abdulrahman Abdullah Periodontics and Community Dental Sciences College of Dentistry King Khalid University Abha Saudi Arabia College of Dentistry King Khalid University Abha Saudi Arabia Faculty of Dentistry Sana’a University Sana’a Republic of Yemen

Objective: to assess the actual practical attitude and knowledge of dental implants among senior dental students and general dentists graduated from some Saudi and Non-Saudi dental schools. Methods: A total of 300 senior dental students and general dentists participated in the study. Hard copies of the self-designed, multiple-choice questionnaires were distributed to all participants. the questionnaire consisted of 31 questions in five parts. Data were collected and analyzed using Chi-square test and t-test, where p Results: there is a statistically significant relationship between the participants’ answers, and their dental schools. Participants’ general knowledge, training, and teaching of dental implants, as well as information about restorations retained for the dental implants, were higher among participants from Saudi dental schools than participants from non-Saudi dental schools, while the information about dental implants was higher among participants from non-Saudi dental schools than participants from Saudi dental schools. Conclusion: We conclude that the actual practical attitude and knowledge of dental implants among participants in the current study was insufficient. therefore, dental implant education in the undergraduate curricula of dental schools surveyed should be updated to include teaching, laboratory training, and preclinical and clinical training.

关键词： Knowledge Dental Implants Dental Schools Non-Saudi Practical Attitude Saudi

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Answers in New Energy technology

引用

空中英语教室（高级版．彭蒙惠英语） 2014年第12期 11-13,39-40页

作者： sami Grover

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Antioxidant and Antimicrobial Capacities of two Medicinal Plants Used against Urinary Infections in Burkina Faso

引用

Advances in Microbiology 2022年第12期12卷 671-683页

作者： sami Eric Kam Roland Nâg-tiéro Meda Soufiane Domalick Sanou Windmi Kagambega Clarisse Ouedraogo Franck téounviel Somda Isaac Saamou Boni Eliasse Zongo Daniel Kobo Gnada Azouman Da Benjamin Kouliga Koama Hermann Yempabou Ouoba Georges Anicet Ouedraogo Laboratoire de Recherche et d’Enseignement en Santé et Biotechnologies Animales Université Nazi Boni Bobo-Dioulasso Burkina Faso Laboratoire de Recherche en Bactériologie INSP/Centre MURAZ Bobo-Dioulasso Burkina Faso Laboratoire de Médicine et Pharmacopée traditionnelle Institut de Recherche en Sciences de la Santé Direction Régionale de l’Ouest Bobo-Dioulasso Burkina Faso

Objective: this study aimed to evaluate the antioxidant and antimicrobial capacities of extracts from Euphorbia hirta L. and terminalia avicennioides GUILL & PERR. Methodology: the crude hydro-acetonic and aqueous extracts as well their fractionations were prepared. the total phenolic, flavonoids and tannins contents were assessed using the Folin-Ciocalteu, aluminum chloride and vanillin acid methods, respectively. the antioxidant and antibacterial activities were investigated using standard methods. Results: Euphorbia hirta showed significant contents of total phenolic and flavonoids in n-Butanol (145.14 ± 1.37 GAE/100mg extracts) and ethyl acetate (23.56 ± 0.68 mg QE/ 100mg extracts) fractions. total tannins were high in hydro-acétonique extract (11.18 ± 0.31 mg tAE/100mg extracts) and aqueous fraction (11.12 ± 0.28 mg tAE/100mg extracts) of terminalia avicennioides stem barks. Extracts and fractions of both plants demonstrated a strongly antioxidant capacity through the free radicals scavenging and the ferric ions reducing. Concerning antimicrobial screening the extracts of terminalia avicennioides were effective against 16 causative pathogens of urinary tract infections. Bactericidal effect against Staphylococcus aureus AtCC 29213, Staphylococcus aureus and 2 methicillin-resistant Staphylococcus haemolyticus strains was found with aqueous fraction of terminalia avicennioides leaves. this fraction also highlighted a synergetic effect with some antibiotics used against these bacterial strains. Conclusion: terminalia avicennioides leaves could be recommended as an herbal drug formulation for the urinary infections management.

关键词： Antimicrobial Antioxidant Euphorbia hirta L. terminalia avicennioides GUILL & PERR Urinary Infections

来源：

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Wheat leaf rust resistance gene Lr13 is a specific Ne2 allele for hybrid necrosis

引用

Molecular Plant 2021年第7期14卷 1025-1028页

作者： timothy Hewitt Jianping Zhang Li Huang Narayana Upadhyaya Jianbo Li Robert Park sami Hoxha Robert McIntosh Evans Lagudah Peng Zhang CSIRO Agriculture&Food GPO Box 1700CanberraACT 2601Australia University of Sydney Plant Breeding InstituteSchool of Life and Environmental Sciences107 Cobbitty RoadCobbittyNSW 2570Australia Department of Plant Sciences and Plant Pathology Montana State UniversityBozemanMT 59717USA

Dear Editor,Wheat leaf rust,caused by Puccinia triticina(Pt),is a destructive fungal disease of wheat *** resistance(R)genes are widely studied as a means to combat ***13 is regarded as one of the most widely distributed leaf rust R genes in wheat(McIntosh et al.,1995).Researchers observed that lines carrying Lr13 consistently gave hybrid necrosis in specific crosses.

关键词： Wheat resistance specific

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

three-dimensional reconstructed magnetic resonance scans:Accuracy in identifying and defining knee meniscal tears

引用

World Journal of Orthopedics 2016年第11期7卷 731-737页

作者： Neil Kruger Eugene Mc Nally sami Al-Ali Raj Rout Jonathan L Rees Andrew J Price Orthopaedic Research Unit University of Cape Town Nuffield Orthopaedic Centre University of Oxford the Whittington Hospital

AIM to determine whether three-dimensional(3D) reconstruction from conventional magnetic resonance imaging(MRI) is able to accurately detect a meniscal tear, and define the *** thirty-three patients' 3t MRI scan data were collected and sagittal uni-planar 3D reconstructions performed from the preoperative MRI. there were 24 meniscal tears in 24 patients, and nine controls. All patients had arthroscopic corroboration of MRI findings. two independent observers prospectively reported on all 33 reconstructions. Meniscal tear presence or absence was noted, and tear configuration subsequently categorised as either radial, bucket-handle, parrot beak, horizontal or *** Identification of control menisci or meniscal tear presence was excellent(Accuracy: observer 1 = 90.9%; observer 2 = 81.8%). Of the tear configurations, bucket handle tears were accurately identified(Accuracy observer 1 and 2 = 80%). the remaining tear configurations were notaccurately *** Uni-planar 3D reconstruction from 3t MRI knee scan sequences are useful in identifying normal menisci and menisci with bucket-handle tears. Advances in MRI sequencing and reconstruction software are awaited for accurate identification of the remaining meniscal tear configurations.

关键词： Knee Meniscus Arthroscopy Magnetic resonance imaging three-dimensional reconstruction Materialise Interactive Medical Control System tear

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

腹腔镜与开腹阑尾切除术的比较研究

腹腔镜与开腹阑尾切除术的比较研究

引用

作者： ABDUL sami 济宁医学院

学位级别：硕士

目的:本文通过比较腹腔镜阑尾切除术（Laparoscopic appendectomy,LA）和开腹阑尾切除术（Open appendectomy,OA）在手术时间、术后住院时间、肠道功能恢复时间和术后并发症发生率等方面的差异,探讨LA用于治疗急性阑尾炎的安全性、可行... 详细信息

目的:本文通过比较腹腔镜阑尾切除术（Laparoscopic appendectomy,LA）和开腹阑尾切除术（Open appendectomy,OA）在手术时间、术后住院时间、肠道功能恢复时间和术后并发症发生率等方面的差异,探讨LA用于治疗急性阑尾炎的安全性、可行性,为临床急性阑尾炎的术式选择提供指导。方法:回顾性分析2018年3月至2019年11月在济宁医学院附属医院急性阑尾炎手术患者的临床资料,共计60例。根据手术方法,将患者分为腹腔镜阑尾切除术组（LA组,n=30）和开腹阑尾切除术组（OA组,n=30）,随访期为8-14个月。收集两组患者的资料,包括性别、年龄、BMI、术前血白细胞数值、术前血中性粒细胞数值、手术时间、术中出血量、术后并发症发生率、切口感染发生率、腹腔感染发生率、开始下床活动时间、住院时间、住院费用（医疗保险报销前）等指标,进行统计分析。使用SPSS 22.0统计软件（SPSS Inc,美国芝加哥）进行统计分析,计量资料以均数±标准差（`x±s）表示,采用t检验,计数资料采用χ检验,P0.05）。***组术后4h疼痛评分较OA低,差异具有统计学意义（P<0.05）。***组术后下床活动时间较OA早,差异具有统计学意义（P<0.05）。***组住院费用较OA组高,差异具有统计学意义（P<0.05）。结论:1.腹腔镜阑尾切除术与开腹阑尾切除术对于阑尾炎的治疗均安全可行。2.腹腔镜阑尾切除术比开腹阑尾切除术具有术后疼痛轻、下床活动时间早等优点;但由于腔镜设备昂贵等因素,行腹腔镜阑尾切除术者住院费用较高。3.在临床实际工作中,需从患者实际利益出发,综合疗效及术者临床技能等因素,我们优先推荐腹腔镜阑尾切除术;在未能熟练掌握腔镜手术以及患者经济水平较差时,开腹阑尾切除术安全实用。

关键词：急性阑尾炎腹腔镜阑尾切除术(LA) 开腹阑尾切除术(OA)

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Large-scale mapping of the Ebola NP and GP proteins reveals multiple immunoprevalent and conserved CD4 t-cell epitopes

引用

Cellular & Molecular Immunology 2021年第5期18卷 1323-1325页

作者： Yann Gallais Raphaël Sierocki Gautier Lhomme Coline Sivelle Divor Kiseljak Florian Wurm sami Djoulah Ahmed Bouzidi Jérôme Kerzerho Bernard Maillère Département Médicament et technologie pour la Santé SIMoSUniversitéParis-SaclayCEA-Saclay91191Gif surYvetteFrance Excellgene MontheySwitzerland Wiratech Europe Genopole91000EvryFrance Vaxeal holding SA VeveySwitzerland

Humankind faces regular outbreaks from emerging viruses,such as Ebola and the current SARS-CoV-2,or from viruses circulating at low levels in the wild animal *** to the suddenness of virus expansion,the lack of knowledge of immune determinants and correlates of protection severely limit the ability to address the *** in 1976,Ebola virus is part of the Filoviridae family and causes severe hemorrhagic fever with a mortality rate between 50%and 90%.From 2013 to 2020,more than 30,000 infections and 15,000 deaths have been reported *** antibody titers against Ebola virus GP are found in patients recovering from Ebola virus infection and correlate with protection in vaccination models.1 Both CD8 and CD4 t-cell responses also seem to participate in the control of Ebola virus infection in animals,and CD4 t cells are necessary to induce resistance to Ebola virus challenge.

关键词： Ebola mortality hemorrhagic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高效率高方向性介质谐振器天线研究

高效率高方向性介质谐振器天线研究

引用

作者： sami UR REHMAN 上海交通大学

学位级别：硕士

纳米技术已越来越深入到我们的生活之中,纳米天线也已成为无线传输、生物医疗等方面的关键器件。本文主要研究有源和无源的环形核壳包层纳米颗粒(t-CNP)的电磁场特性。本文采用CSt的频域仿真求解器研究并验证了环形核壳包层纳米颗粒的性... 详细信息

纳米技术已越来越深入到我们的生活之中,纳米天线也已成为无线传输、生物医疗等方面的关键器件。本文主要研究有源和无源的环形核壳包层纳米颗粒(t-CNP)的电磁场特性。本文采用CSt的频域仿真求解器研究并验证了环形核壳包层纳米颗粒的性能,包括在平面波激励下有源与无源t-CNP的特性和赫兹电偶极子(EHD)激励下的电磁特性。对于有源的t-CNP,分别用线极化和圆极化平面波作激励源,结果表明,当t-CNP的中心填充有源媒质时,即采用很少的铒Er3+离子掺杂,提高了在谐振频率点的SCS和ACS,但是t-CNP天线增益受来波照射方向的影响很大。另外,通过改变EHD的位置,我们对有源t-CNP的EHD激励进行分析和研究,结果表明EHD可以有效激励有源纳米颗粒t-CNP,尤其在谐振点可以获得很高增益。无论t-CNP由平面波激励还是电偶极子激励,他们都能产生谐振,并且辐射场的响应是基本电偶极子模式。在平面波激励下,和无源t-CNP相比,有源t-CNP的散射截面积峰值最大可增加34dBsm。相对应的EHD激励的全部辐射能量比(Purcell factor)的峰值最大值也增加了45dB。结果表明有源t-CNP作为纳米天线有很好的应用前景。

关键词：电偶极子介质谐振器天线增益 resonant dielectric 圆极化照射方向散射截面谐振点 dipole

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Lightweight porous silica foams with extreme-low dielectric permittivity and loss for future 6G wireless communication technologies

引用

Nano Research 2021年第5期14卷 1450-1456页

作者： Petra S.Pálvölgyi Daniel Sebők Imre Szenti Eva Bozo Henri Ervasti Olli Pitkänen Jari Hannu Heli Jantunen Marko E.Leinonen sami Myllymäki Akos Kukovecz Krisztian Kordas Microelectronics Research Unit Faculty of Information and Electrical EngineeringUniversity of OuluP.O.Box 4500FI-90570OuluFinland Interdisciplinary Excellence Centre Department of Applied and Environmental ChemistryUniversity of SzegedRerrich Béla tér 1H-6720SzegedHungary Centre for Wireless Communications University of OuluP.O.Box 4500FI-90570OuluFinland

In the next generation wireless communication systems operating at near terahertz frequencies, dielectric substrates with the lowest possible permittivity and loss factor are becoming essential. In this work, highly porous (98.9% ± 0.1%) and lightweight silica foams (0.025 ± 0.005 g/cm3), that have extremely low relative permittivity (εr = 1.018 ± 0.003 at 300 GHz) and corresponding loss factor (tan δt 300 GHz) are synthetized by a template-assisted sol-gel method. After dip-coating the slabs of foams with a thin film of cellulose nanofibers, sufficiently smooth surfaces are obtained, on which it is convenient to deposit electrically conductive planar thin films of metals important for applications in electronics and telecommunication devices. Here, micropatterns of Ag thin films are sputtered on the substrates through a shadow mask to demonstrate double split-ring resonator metamaterial structures as radio frequency filters operating in the sub-tHz band.

关键词： low-permittivity materials low-loss dielectrics templated sol-gel synthesis silica foams 6G telecommunication

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

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：