检索结果-南通市图书馆

Enhanced electromagnetic wave absorption via optical fiber-like PMMA@Ti_(3)C_(2)T_(x)@SiO_(2) composites with improved impedance matching

引用

Nano Research 2024年第3期17卷 1676-1686页

作者： Huanhuan Niu Xuewen Jiang Wei Li Zhiyu Min budi riza putra Wulan Tri Wahyuni Hailong Wang Rui Zhang Bingbing Fan School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Tongji UniversityShanghai 201804China Department of Materials and Earth Sciences Technical University of DarmstadtDarmstadt 64287Germany School of Material Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China Research Center for Metallurgy National Research and Innovation Agency(BRIN)PUSPIPTEK Gd.470South TangerangBanten 15315Indonesia Analytical Chemistry Division Department of ChemistryFaculty of Mathematics and Natural SciencesIPB UniversityWest Java 16680Indonesia

Ti_(3)C_(2)T_(x) nanosheets have attracted significant attention for their potential in electromagnetic wave absorption(EWA).However,their inherent self-stacking and exorbitant electrical conductivity inevitably lead to serious impedance mismatch,restricting their EWA ***,the optimization of impedance matching becomes *** this work,we developed polymethyl methacrylate(PMMA)@Ti_(3)C_(2)T_(x)@SiO_(2) composites with a sandwich-like core–shell structure by coating SiO_(2) on PMMA@Ti_(3)C_(2)T_(x).The results demonstrate that the superiority of the SiO_(2) layer in combination with PMMA@Ti_(3)C_(2)T_(x),outperforming other relative graded distribution structures and meeting the requirements of EWA *** resulting PMMA@Ti_(3)C_(2)T_(x)@SiO_(2) composites achieved a minimum reflection loss of-58.08 dB with a thickness of 1.9 mm,and an effective absorption bandwidth of 2.88 *** analysis revealed that the structural design of SiO_(2) layer not only optimized impedance matching,but also synergistically enhanced multiple loss mechanisms such as interfacial polarization and dipolar ***,this work provides valuable insights for the future preparation of high-performance electromagnetic wave absorbing Ti_(3)C_(2)T_(x)-based composites.

关键词： polymethyl methacrylate(PMMA)@Ti_(3)C_(2)T_(x)@SiO_(2)composites impedance match SiO_(2)layer optical fiber-like structure interfacial polarization and dipolar polarization

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

Multifunctional SiC@SiO_(2) Nanofiber Aerogel with Ultrabroadband Electromagnetic Wave Absorption

引用

Nano-Micro Letters 2022年第9期14卷 237-256页

作者： Limeng Song Fan Zhang Yongqiang Chen Li Guan Yanqiu Zhu Mao Chen Hailong Wang budi riza putra Rui Zhang Bingbing Fan School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanPeople’s Republic of China School of Materials Science and Engineering Zhengzhou University of AeronauticsZhengzhou 450015HenanPeople’s Republic of China College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter EX44SBUK Research Center for Metallurgy National Research and Innovation AgencySouth Tangerang 15315BantenIndonesia State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongPeople’s Republic of China School of Materials Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023HenanPeople’s Republic of China

Traditional ceramic materials are generally brittle and not flexible with high production costs,which seriously hinders their practical *** nanofiber ceramic aerogels are highly desirable for applications in extreme environments,however,the integration of multiple functions in their preparation is extremely *** tackle these challenges,we fabricated a multifunctional SiC@SiO_(2) nanofiber aerogel(SiC@SiO_(2) NFA)with a threedimensional(3D)porous cross-linked structure through a simple chemical vapor deposition method and subsequent heat-treatment *** as-prepared SiC@SiO_(2) NFA exhibits an ultralow density(~11 mg cm^(-3)),ultra-elastic,fatigue-resistant and refractory performance,high temperature thermal stability,thermal insulation properties,and significant strain-dependent piezoresistive sensing ***,the SiC@SiO_(2) NFA shows a superior electromagnetic wave absorption performance with a minimum refection loss(RL_(min))value of-50.36 d B and a maximum effective absorption bandwidth(EAB_(max))of 8.6 *** successful preparation of this multifunctional aerogel material provides a promising prospect for the design and fabrication of the cutting-edge ceramic materials.

关键词： Multifunctional SiC@SiO_(2)nanofiber aerogel Chemical vapor deposition Electromagnetic wave absorption Ceramic materials

来源：

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

Evaluation of zoonotic potency of Escherichia coli O157:H7 through arbitrarily primed PCR methods

引用

Asian Pacific Journal of Tropical Biomedicine 2015年第11期5卷 915-920页

作者： I Wayan Suardana Dyah Ayu Widiasih I Gusti Ngurah Kade Mahardika Komang Januartha putra Pinatih budi Setiadi Daryono Department of Veterinary Public Health Faculty of Veterinary MedicineUdayana University Department of Veterinary Public Health Faculty of Veterinary MedicineGadjah Mada University Department of Virology Faculty of Veterinary MedicineUdayana University Department of Clinical Microbiology Faculty of MedicineUdayana University Department of Genetic Faculty of BiologyGadjah Mada University

Objective: To evaluate the zoonotic potency of Escherichia coli O157:H7 through arbitrarily primed-PCR(AP-PCR) methods as one of the DNA fingerprinting ***: A total of 14 isolates consisted of 11 isolates originated from human feces with renal failure symptoms, 2 isolates originated from cattle feces, and 1 control isolate were used in this study. DNA of each isolate was extracted, and their pro files were studied by using AP-PCR method with M13 F and M13 R arbitrary ***: The results founded that all of 14 isolates had similarity range from 54.6% to88.5%. Isolates KL-106(3) and KL-55(6) originated from humans showed the degree of similarity with isolates SM-25(1) and SM-7(1) originated from cattle as high as 85% and77%, ***: The high degree of similarity between isolates originated from cattle and human indicated the high potency of zoonoses. The results also concluded AP-PCR method as a brie fly fingerprinting method in order to trace the epidemiological of E. coli O157:H7.

关键词： E. coli O157:H7 Zoonoses Animals Human AP-PCR

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

Serum testosterone and prostate-specific antigen levels are major risk factors for prostatic volume increase among benign prostatic hyperplasia patients

引用

Asian Journal of Urology 2021年第3期8卷 289-297页

作者： Gede Wirya Kusuma Duarsa Yudit Anastasia Sari Anak Agung Gde Oka Kadek budi Santosa I Wayan Yudiana Pande Made Wisnu Tirtayasa Ida Bagus putra Pramana Yudhistira Pradnyan Kloping Department of Urology Sanglah General HospitalFaculty of Medical and Health Sciences of Udayana UniversityDenpasarBaliIndonesia General Surgery Department Faculty of Medicine Udayana UniversityDenpasarBaliIndonesia Medical Faculty Universitas AirlanggaSurabayaEast JavaIndonesia

Objective:Benign prostatic hyperplasia(BPH)is one of the most common diseases found among elderly *** though multiple risk factors of BPH have been identified in the past,the risk factors which have a direct impact on prostate volume have not been *** this study,we aim to determine the most significant contributing risk factors to prostate volume enlargement by analyzing possible associated risk factors previously ***:This is a quantitative study with an analytical observational design,performed using a retrospective cohort *** sampling was performed on 83 patients who underwent transurethral resection of the prostate(TURP)in Sanglah General Hospital from January to February *** analysis is performed to examine each variable's association with prostate volume followed by a multivariate *** variables were reassessed with path analysis to measure the direct effects,indirect effects,and total effects on prostate ***:Bivariate analysis shows that serum testosterone(R=0.208;p=0.059)and prostate-specific antigen(PSA)level(R=0.626;p=0.001)have a significant association with prostate *** analysis shows that serum PSA(B=1.4;p=0.001;95%confidence interval[95%CI]=1.039-1.770)and testosterone(B=0.024;p=0.005;95%CI=0.008-0.041)levels are significant among all the analyzed risk *** is a significant and strong effect of PSA to prostate volume(c=0.636;p=0.001)whereas testosterone has a significant albeit weak effect to prostate volume(c=0.246;p=0.009)based on the total effect of the path ***:Serum testosterone and PSA levels are significantly associated with prostatic volume increase among BPH patients.

关键词： Testosterone Prostate-specific antigen Prostate volume Benign prostatic hyperplasia

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

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

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：