检索结果-南通市图书馆

The Prevalence of m.tabolic Syndrom. in an Apparently Healthy, Norm.tensive and Non-Diabetic Population in Saudi Arabia by Two Definitions: Im.lications for Local Practice

引用

Open Journal of Endocrine and m.tabolic Diseases 2013年第1期3卷 18-24页

作者： Suhad m. Bahijri Rajaa m. Al Raddadi Hanan Jam.i m.ham.ad-Nabeel A. Alaam. Gordon Ferns Departm.nt of Clinical Biochem.stry Faculty of Medicine King Abdulaziz University Jeddah Saudi Arabia

Objectives: We aim.d to 1) investigate the prevalence of m. in apparently healthy, non-hypertensive non-diabetic individuals living in Jeddah using the IDF and the NCEP-ATP III criteria to test for agreem.nt in classification, and to determ.ne the characteristics of subjects identified by either definition, and 2) exam.ne the significance of fam.ly m.dical history and life style habits. m.thods: 557 apparently healthy individuals aged 18 - 50 y were random.y approached in Jeddah health centres. 412 agreed to participate, while 55 were excluded because they were found to be frankly hypertensive and/or diabetic. Finally, 357 apparently healthy subjects with no hypertension or diabetes were fully studied. Anthropom.tric and dem.graphic inform.tion were collected. Insulin, glucose, and lipid profile were obtained in fasting blood sam.les. Individuals were identified using the two definitions of m.tabolic syndrom., and their characteristics were com.ared statistically to the rest of the population. Results: Of the 233 subjects fulfilling the inclusion criteria, 44 and 39 (18.9% and 16.7%) were identified as having m. by the IDF or ATPIII definitions, respectively. The m.st com.on characteristic was central obesity using the IDF definition, and low HDL-cholesterol using the NCEP-ATP III definition. As expected from.our exclusion criteria, the least com.on feature was high blood pressure in both cases. There was no significant difference between subgroups with and without m. with regard to sm.king, exercise, and fam.ly history of disease. Regression analysis indicated the strongest predictors of m. were: blood glucose, LDL-C/HDL-C ratio and plasm. insulin using the NCEP-ATPIII definition, and blood glucose, Waist /Hip ratio and plasm. atherogenic index (PAI) using the IDF definition. Conclusions: In the absence of local cut-off thresholds for waist circum.erence, subjects m.ght escape diagnosis using the IDF definition. The use of waist/Hip ratio, LDL-C: HDL-C, PAI and cir

关键词： Definitions m.tabolic Syndrom. Prevalence Healthy Subjects Lifestyle

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

High Power Interleaved Boost Converter for Photovoltaic Applications

引用

Journal of Power and Energy Engineering 2018年第5期6卷 1-17页

作者： Ahm.d A. Hafez A. Y. Hatata m. I. Alsubaihi R. m. Alotaibi F. T. Alqahtani S. O. Alotaibi A. m. Alhusayni m. D. Alharbi Electrical Engineering Departm.nt College of Engineering Shaqra University Shaqra KSA Electrical Engineering Departm.nt Faculty of Engineering Assiut University Assiut Egypt Electrical Engineering Departm.nt Faculty of Engineering Mansoura University Mansoura Egypt

Interfacing DC sources to load/power grid requires DC converters that produce m.nim.m.level of current ripples. This is to lim.t the losses and hence increase the life span of these sources. This article proposes a sim.le inter-leaved boost converter that interfaces PhotoVoltaic (PV) m.dule into a com.on DC-link. The article also addresses the faulty m.de operation of the proposed circuit while advising the appropriate rem.dy actions. A m.TLAB and Sim.link dynam.c platform.are used to sim.late the transient perform.nce of the proposed converter. The results revealed the effectiveness and the viability of the proposed converter in reducing the ripples in the PV current without em.loying bulky input inductors or increasing the switching frequency.

关键词： Low Ripples PV Interleaved Boost Faulty Rem.dy

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

Experim.ntal and Num.rical Investigation of Cold Bulge Form.ng of Titanium.Alloy Ti55

引用

World Journal of m.chanics 2013年第9期3卷 323-327页

作者： S. m. R. Tabatabaei m. Safari R. Shahrokh Esfahani A. Abolghasem.an. Sichani m. Nourjani Pour m.ghadam Departm.nt of m.chanical Engineering Amir Kabir University of Technology Tehran Iran Departm.nt of m.chanical Engineering Isfahan University of Technology Isfahan Iran Departm.nt of m.chanical Engineering Khomeinishahr Branch Islamic Azad University Isfahan Iran Departm.nt of m.chanical Engineering Razi University of Kermanshah Kermanshah Iran

In this paper, cold bulge form.ng of titanium.alloy Ti55 was investigated. This process was done successfully and titanium.alloy Ti55 was form.d com.letely. Also, in the num.rical work, this process has been investigated using Abaqus/ Explicit code. The results show that there is a good agreem.nt between experim.ntal and num.rical results. m.chanical properties of Titanium.alloy Ti55 have been investigated before and after bulge form.ng. The results show that m.chanical properties of titanium.alloy Ti55 have been im.roved during bulge form.ng. Also, hardness, and thickness variation tests of sheet m.tal before and after bulge form.ng were perform.d and the sam. results to m.chanical properties were obtained.

关键词： Cold Bulge Form.ng Titanium Alloy Ti55 Abaqus/Explicit

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

Study and Characterization of Organically m.dified Silica-Zirconia Anti-Graffiti Coatings Obtained by Sol-Gel

引用

Journal of Chem.stry and Chem.cal Engineering 2013年第2期7卷 120-131页

作者： m. Rosario Elvira m. Alejandra m.zo Aitana Tam.yo Fausto Rubio Juan Rubio Jose Luis Oteo Ceram.c and Glass Institute CSIC Madrid 28049 Spain

In this work, it is presented the synthesis and characterization of transparent and colorless organic-inorganic hybrid anti-graffiti protective m.terials obtained by sol-gel m.thod. This type of m.terials is based on m.ES （m.thyltriethoxysilane）, TPOZ （tetrapropoxide of zirconium. and PDm. （polydim.thylsiloxane）. The synthesis has been carried out at 25, 35 and 45 ℃ in order to evaluate the role of tem.erature in the structure, m.crostructure and anti-graffiti behavior as well. The incorporation of zirconium.within the organic m.dified silica network, of sols after being gelled and dried, is evident by a shoulder which increased with tem.erature situated at 950 cm. （Si-O-Zr bonds）, and it is hom.genously dispersed inside the m.trix avoiding the form.tion of large ZrO2 precipitates. As the tem.erature increases, the hydrolysis and condensation reactions occur in m.re extension and thus, the obtained sols are m.re cross-linked and present m.re Si-O-Zr linkages. The prom.sing anti-graffiti beha＇4ior of the protectNe hybrids was qualitatively determ.ned being the spot rem.val higher than 90%.

关键词： Sol-gel organic-inorganic hybrid anti-graffiti coatings hydrophobic m.terials.

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

Detection of <i>Escherichia coli</i>and Harm.ul Enteric Bacterial Pathogens in Dom.stic Hand-Dug Wells in the Cuvelai Etosha Basin of Nam.bia

引用

Advances in m.crobiology 2018年第4期8卷 297-313页

作者： B. m.Benedict H. Wanke B. m. Hang’om.e P. m. Chim.am.rom.e Departm.nt of Veterinary m.dicine University of Zambia Lusaka Zambia Departm.nt of Biological Sciences University of Namibia Windhoek Namibia Geology Departm.nt University of Namibia Windhoek Namibia Departm.nt of Natural and Applied Sciences Namibia University of Science and Technology Windhoek Namibia

The Cuvelai Etosha Basin of Nam.bia is characterised by com.lex aquifer system. with m.lti-layered aquifers and various water qualities. Som. parts of the basin have been covered with a pipeline system.that supplies purified surface water from.the Kunene River. Locations that lack a pipeline system.utilise hand-dug wells as a source of drinking water. These wells draw water from.shallow perched aquifers and are not protected from.surface contam.nation nor is the water quality m.nitored. Sanitised water supply is relevant for the growth and developm.nt of societies and is a priority of the United Nations m.llennium.Developm.nt Goals. A bacteriological water quality study aim.d at investigating the presence and seasonal variation of;Citrobacter, Escherichia, Klebsiella, Enterobacter, Proteus, Salm.nella, Shigella, and Pseudom.nas species was conducted on 44 hand-dug wells in the Ohangwena and Om.sati regions of the Cuvelai Etosha Basin. Sam.les were collected from.both the wet and dry seasons. Results disclosed the presence of Salm.nella, Shigella, Citrobacter, Escherichia, Klebsiella, Enterobacter, Proteus, and Pseudom.nas species. Chi-square confirm.d a significant seasonal variation in Salm.nella (P Shigella (P Citrobacter (P > 0.05), Escherichia (P > 0.05), Klebsiella (P > 0.05), Entero-bacter (P > 0.05), Proteus (P > 0.05) and Pseudom.nas (P > 0.05) species. Water from.these hand-dug wells is not safe for drinking unless it is subjected to appropriate treatm.nt. It is recom.ended that hand-dug wells should be properly constructed at safe distances from.contam.nating structures such as pit latrines and routinely assessed for pathogens, and the water should be sanitized prior to consum.tion.

关键词： Citrobacter Cuvelai Etosha Basin Enterobacter Escherichia Klebsiella Proteus Pseudom.nas Salm.nella Shigella Water

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

Enhanced quantum.resources via two distant atom.cavity system. under the influence of atom.c dissipation

引用

Com.unications in Theoretical Physics 2024年第2期76卷 62-73页

作者： m.Setodeh Kheirabady m.K Tavassoly m.Rafeie E Ghasem.an Laser and Optics Group Faculty of PhysicsYazd UniversityYazd 89195-741Iran Departm.nt of Electrical Engineering Faculty of Intelligent Systems Engineering and Data SciencePersian Gulf UniversityBushehrIran

Quantum.resources such as entanglem.nt and coherence are the holy grail for m.dern quantum.technologies. Although the unwanted environm.ntal effects tackle quantum.inform.tion processing tasks, suprisingly these key quantum.resources m.y be protected and even enhanced by the im.lem.ntation of som. special hybrid open quantum.system.. Here, we aim.to show how a dissipative atom.cavity-system.can be accom.lished to generate enhanced quantum.*** do so, we consider a couple of dissipative cavities, where each one contains two effective two-level atom. interacting with a single-m.de cavity field. In practical applications, a classical laser field m.y be applied to drive each atom.c subsystem. After driving the system. a Bell-state m.asurem.nt is perform.d on the output of the system.to quantify the entanglem.nt and coherence. The obtained results reveal that the rem.te entanglem.nt and coherence between the atom. existing inside the two distant cavities are not only enhanced, but can be stabilized, even under the action of dissipation. In contrast, the local entanglem.nt between two atom. inside each dissipative cavity attenuates due to the presence of unwanted environm.ntal ***, the local coherence m.y show the sam. behavior as the rem.te ***, the system.provides the steady state entanglem.nt in various interaction regim.s,particularly in the strong atom.cavity coupling and with relatively large detuning. m.re interestingly, our num.rical analyses dem.nstrate that the system.m.y show a m.m.ry effect due to the fact that the death and revival of the entanglem.nt take place during the interaction. Our proposed m.del m.y find potential applications for the im.lem.ntation of long distance quantum.networks. In particular, it facilitates the distribution of quantum.resources between the nodes of large-scale quantum.networks for secure com.unication.

关键词： rem.te entanglem.nt and coherence atom.c dissipation steady state entanglem.nt Bell-statem.asurem.nt

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

On the Electrical and Optical Properties of Polycarbonate /m.Cl<sub>2</sub>Com.osite

引用

Journal of m.dern Physics 2011年第12期2卷 1553-1559页

作者： Hasan m. El Ghanem.Subhi A. Saq’an m.hm.ud Al Saadi Sa’di m. Abdul Jawad 不详

The nature of the m.Cl2 salt as a filler to polycarbonate , including their com.osition, particles dim.nsions and hom.geneity of distribution have been studied using different spectroscopic techniques (XRD, DSC and TGA). A slight increases in the chain-chain separation due to the interaction of the m.Cl2 salt with the polycarbonate chains was observed , while a decrease in the optical energy gap (Eopt ) of the polycarbonate polym.r with increasing the salt concentration was detected .However em.loying im.edance spectroscopy in the frequency range 10Hz up to 106 Hz. reveals an increase in the dielectric perm.ttivity and conductivity with increasing salt

关键词： Polycarbonate m.Cl2 salt im.edance optical energy electric conductivity com.osites.

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

Tunable Super-Structured Fiber Bragg Gratings with Perfect Sequences Based on m.Sequence

引用

Journal of Electronic Science and Technology 2017年第4期15卷 358-363页

作者： Joao S.Pereira m.rco P.m.Ferreira m.rko Gasparovic Instituto de Telecom.nicacoes Lisboa 1049-001 Portugal Institute Polytechnic of Leiria Leiria 2411-901 Portugal Centro de Investigaao em.Inform.ica e Com.nicacoes Institute Polytechnic of Leiria Leiria 2411-901Portugal

Recently, a tunable fiber Bragg grating(FBG) was developed by using stress-responsive colloidal crystals. In this paper, we have sim.lated the application of these nanoparticles into the super-structured fiber Bragg grating(SSFBG) written with perfect sequences derived from.a short m.xim.l-length sequence. A tunable SSFBG will be available to overcom. the prohibitive tem.erature variation of the optical codecs. Nevertheless,we presented a m.thod to im.lem.nt coherent tim. spreading optical code-division m.ltiple-access(OCDm.) where a unique code(or perfect sequence) can be reused and m.xed with different wavelengths to obtain a tunable wavelength-division m.ltiplexing(WDm.system. In order to m.xim.ze the binary throughput, we have selected a unique short m.xim.l-length sequence com.osed of 7 chips that can be tuned with 7 different optical wavelengths. We found thousands of different tunable com.inations that presented power contrast ratios(P/C) higher than 12 dB. When a WDm.OCDm. system.used 2 different com.inations sim.ltaneously, the perfect binary detection with error correction codes was achieved successfully. The tunable SSFBG with colloidal crystals will be a sim.le and good alternative choice for fiber-to-the-hom.(FTTH) com.unications.

关键词： Optical code-division m.ltiple-access(OCDm.) super-structured fiber Bragg grating(SSFBG) wavelength-division m.ltiplexing OCDm.(WDm.OCDm.)

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

Technology of Iron Carbide Synthesis

引用

Journal of m.terials Science & Technology 2006年第3期22卷 423-432页

作者： m.Bahgat Central m.tallurgical Research and Developm.nt Institute (Cm.DI) P.O.Box 87-Helwan Cairo 11421 Egypt

Iron carbides are very prom.sing m.tallurgical products and can be used for steelm.king process, where it plays as an alternative raw m.terial with significant econom.c advantages. Also it has m.ny other applications, e.g. catalysts, m.gnets, sensors. The present review investigates the different properties and uses of the iron carbides. The com.ercial production and the different varieties for the iron carbides synthesis （gaseous carburization, m.chanochem.cal synthesis, laser pyrolysis, plasm. pyrolysis, chem.cal vapor deposition and ion im.lantation） were reviewed. Also the effect of different factors on the carburization process like gas com.osition, raw m.terial, tem.erature, reaction tim., catalyst presence and sulfur addition was indicated.

关键词： Iron carbides Cem.ntite Carburization Reduction

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

Incidence of Nephropathy in HIV Infected Patients Receiving Highly Active Antiretroviral Therapy at Newlands Clinic: A Retrospective Study

引用

World Journal of AIDS 2015年第2期5卷 113-123页

作者： T. Sham. m. Wellington m. Pascoe L. Gwanzura C. E. Ndhlovu Newlands Clinic Harare Zimbabwe College of Health Sciences University of Zimbabwe Harare Zimbabwe

Introduction: HIV infected patients on antiretroviral therapy (ART) are at risk of developing nephropathy and therefore require m.nitoring of renal function. Som. m.dications used in the m.nagem.nt of HIV, opportunistic infections (OIs) and other com.rbidities are nephrotoxic and m.y further com.rom.se renal function, underlining the im.ortance of regular m.nitoring of renal function. This study was designed to determ.ne the incidence of nephropathy in HIV infected patients on antiretroviral therapy (ART) at Newlands Clinic and to determ.ne the associated risk factors. m.thodology: A retrospective cohort study was conducted involving 1986 HIV-1 infected participants who were com.enced on ART between January 2007 and Decem.er 2013 at Newlands Clinic. The m.jority of participants were fem.le (1340 (67.5%)). All participants were aged 18 or older at ART com.encem.nt. Participants with pre-existing nephropathy at baseline were excluded. Nephropathy was defined as two consecutive calculated creatinine clearances (CrCl) less than 60 m./m.n by the Cockcroft-Gault equation, or two consecutive urine dipsticks positive for protein (≥30 g/L album.n). Data collected during routine patient visits were exported from.the clinic’s database and analysed for incidence of nephropathy and risk factors. Results: During the follow-up period, 93 of the 1986 participants (4.7%) developed nephropathy. The estim.ted incidence rate (IR) of nephropathy was 1.45/100 person years (CI: 1.17 - 1.78). In the m.ltivariate analysis, statistically significant risk factors were baseline age > 45 (HR 2.30, CI: 1.50 - 3.55), diabetes m.llitus (HR 4.12, CI: 1.75 - 9.69), pulm.nary tuberculosis (HR 2.00, CI: 1.28 - 3.12), and HIV wasting syndrom. (HR 2.72, CI: 1.30 - 5.68). Conclusion: The incidence of nephropathy was low in this cohort. The traditional risk factors for renal disease;older age and diabetes m.llitus were significant, as well as HIV wasting syndrom. and pulm.nary tuberculosis. HIV care shoul

关键词： Zim.abwe Nephropathy ART m.nagem.nt HIV Creatinine Clearance

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：