检索结果-南通市图书馆

Assessment of the physicochemical properties and biological activity of Vietnamese single-bulb black garlic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Bioscience 2022年第5期49卷 436-445页

作者： Cao Thi Hue Luc Quang Tan Hoang Van Hung Quynh Thi Ngoc le Thanh Hoa Nguyen Nguyen Thi Lan Huong Nguyen Manh Ha dinh Kha Trinh Department of Biotechnology Thuyloi University175 Tay SonDong DaHanoiViet Nam Thai Nguyen University-Lao Cai Campus Group 13Binh Minh WardLao Cai CityLao Cai ProvinceViet Nam Hanoi University of Industry 298 Cau DienBac Tu LiemHanoiViet Nam

This study assessed the quality and biological activity of Vietnamese single-bulb black garlic(SBG)by investigating the effect of different temperatures(60,65,70,and 75℃)on physicochemical properties during the heat treatment *** optimal treating conditions accounted for the highest concentration of antioxidants were 70℃for 42 *** SBG.70 had a higher content of reducing sugar,protein,flavonoid,and polyphenol in comparison with the white garlic and the *** activity of single-bulb white garlic and SBG were measured via DPPH,phosphomolybdenum,and H2O2 radicals,as well as a reduction *** antimicrobial activity was assessed by the multi-concentration dilution method;the sample treated at 70℃displayed the strongest activity against four microbial strains with MIC values for ***,***,***,and *** of 64,128,128,and 64μg/mL,***,only two SBG samples aged at 70℃and 75℃were bacteriostatic to *** with MIC values of 32 and 64μg/mL,respectively.

关键词： Single-bulb black garlic Different temperature Physicochemical Antioxidant content Antioxidant activity Antimicrobial activity

Simulation of stabilizing process of dielectric nanoparticle in optical trap using counter-propagating pulsed laser beams

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics letters 2010年第3期8卷 332-334页

作者： Ho Quang Quy Mai Van Luu Hoang dinh Hai Donan Zhuang Institute of Applied PhysicsNEWTECHPRO Vietnam Academy of Science and Technology Faculty of PhysicsVinh University Pedagogical College of Nghean Department of PhysicsKing Mingkut's University of Technology Thonburi

The stabilizing process of glass particle in water by optical trap using the pulsed counter-propagating Gaussian beams is investigated. The influence of the optical power and the particle dimension on the rate and tim... 详细信息

关键词： Simulation of stabilizing process of dielectric nanoparticle in optical trap using counter-propagating pulsed laser beams

Imperfect Channel State Information of AF and DF Energy Harvesting Cooperative Networks

在线全文

学校读者我要写书评

暂无评论

China Communications 2016年第10期13卷 11-19页

作者： Hoang-Sy NGUYEN Anh-Hoa BUI dinh-Thuan DO Miroslav VOZNAK Wireless Communications Research Group Faculty of Electrical and Electronics Engineering Ton Duc Thang UniversityHo Chi Minh City Vietnam Eastern International University Binh Duong Province Vietnam Faculty of Electrical Engineering and Computer Science Technical University of Ostrava17. Listopadu 15/2172 70833 Ostrava Czech Republic

Wireless information and powered transfer networks(WIPT) has recently been implemented in 5th generation wireless networks. In this paper, we consider half-duplex relaying system in which the energy constrained relay node collects energy via radio frequency(RF) signals from the surrounding resources. Regarding energy harvesting protocol, we propose power time switching-based relaying(PTSR) architecture for both amplify-and-forward(AF) and decode-and-forward(DF). Especially, we reveal the analytical expressions of achievable throughput, ergodic capacity and energy-efficient in case of imperfect channel state information(CSI) for both AF and DF network. Through numerical analysis, we analyse the throughput performance, energy-efficient and ergodic capacity for different parameters, including power splitting ratio and energy harvesting time. Moreover, we also depict the performance comparison between AF and DF network with perfect and imperfect CSI. The results in numerical analysis reveal that the result of AF relaying network is less significant than DF relaying network in the various scenarios.

关键词： amplify-and-forward decode-and-forward energy harvesting throughput channel state information(CSI)

Tuning the inhomogeneous charge transport in ZnO interfaces for ultrahigh on/off ratio top-gated field-effect-transistor arrays

在线全文

学校读者我要写书评

暂无评论

Nano Research 2020年第11期13卷 3033-3040页

作者： Thanh Luan Phan dinh Loc Duong Tuan Khanh Chau Sidi Fan Won Tae Kang Thi Suong le Hyun Yong Song Linfeng Sun Van Tu Vu Min Ji lee Quoc An Vu Young Hee lee Woo Jong Yu Department of Electrical and Computer Engineering Sungkyunkwan UniversitySuwon16419Republic of Korea Center for Integrated Nanostructure Physics(CINAP) Institute for Basic Science(IBS)Suwon16419Republic of Korea Department of Energy Science Sungkyunkwan UniversitySuwon16419Republic of Korea Department of Physics Sungkyunkwan UniversitySuwon16419Republic of Korea

The interface between oxide/oxide layers shows an inhomogeneous charge transport behavior,which reveals a high conductivity owing to *** typical example is the hetero-interface between ZnO film and other wide band gap oxides(e.g.,Al_(2)O_(3),TiO_(2),and HfO_(2)).It is thus quite evident that the ZnO/other oxides hetero-interface contains high density electron carriers effectively screening the gate-induced electric ***,an extremely weak gate modulation in ZnO film was showed,resulting in very low on/off ratio of 1.69 in top-gate field-effect-transistor(TG-FET)***,to extend the usage of ZnO TG-FET is not quite possible toward further practical ***,we clarified the correlation of inhomogeneous region in oxide/oxide hetero-junction by systematically *** work suggests that a self-assembly of molecules(SAM)buffer layer is suitable for tuning the inhomogeneous charge transport in ZnO film,which not only reduces the interface trap density,but also effectively enhances the gate electric field modulation at the *** further report the robust fabrication of TG-FET arrays based on ZnO thin film,using an ultra-thin alkylphosphonic acid molecule monolayer as buffer *** device demonstrates a pronounced ultrahigh on/off ratio of≥10^(8),which is 8-order of magnitude higher than that of a device without buffer *** the highly reliable arrays,our device exhibits a high yield of over 93%with an average on/off ratio of^10^(7) across the entire wafer scale,mobility(18.5 cm^(2)/(V·s)),an extended bias-stressing(~2,000 s)and long-stability(~150 days)under ambient conditions.

关键词： zinc oxides thin-film field-effect-transistor self-assembly molecule inhomogeneous charge transport interface engineering

超强台风“威马逊”作用下红河三角洲海域水动力环境变化的数值研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

海洋科学 2021年第4期45卷 64-74页

作者：乔璐璐 le DUC cuong 李珏段晓勇印萍海底科学与探测技术教育部重点实验室山东青岛266100 中国海洋大学海洋地球科学学院山东青岛266100 青岛海洋地质研究所山东青岛266071

201409号超强台风"威马逊"于2014年7月从北部湾北部过境,对红河三角洲近岸海域的水动力环境产生重要影响。本文基于Delft3D建立三维潮、流、浪耦合数值模型,对红河三角洲水位、海流及波浪对台风的响应变化进行模拟。结果表明:威马逊台... 详细信息

201409号超强台风"威马逊"于2014年7月从北部湾北部过境,对红河三角洲近岸海域的水动力环境产生重要影响。本文基于Delft3D建立三维潮、流、浪耦合数值模型,对红河三角洲水位、海流及波浪对台风的响应变化进行模拟。结果表明:威马逊台风期间,红河三角洲海域风速增大约6倍,风向由偏南风转为偏北风,表底层流速均受影响,其中表层变化较大,表现为北分量流速明显增大,流向变为偏南向,与风向主分量变化有关;波高增大为正常海况的9倍,时间变化与风速一致。本研究获得了从北部湾北部海域过境的台风影响下红河三角洲海域水动力环境的响应变化特征,对该海域的物质输运研究及海洋工程建设有重要意义。

关键词：威马逊台风红河三角洲 Delft3D 海流波浪

Assessment of Radiation Dose Caused by Radioactive Gaseous Effluent Released from Nuclear Power Plant Ninh Thuan 1 under Scenario of Normal Working Conditions

在线全文

学校读者我要写书评

暂无评论

World Journal of Nuclear Science and Technology 2015年第3期5卷 183-191页

作者： Nguyen Tuan Khai Do Xuan Anh le dinh.cuong Duong Duc Thang Vuong Thu Bac Nguyen Thi Thu Ha Nguyen Quang Long Trinh Van Giap Nguyen Hao Quang Institute for Nuclear Science and Technology (INST) Hanoi Vietnam Vietnam Atomic Energy Institute (VINATOM) Hanoi Vietnam

Based on guides RG 1.109, RG 1.111 published by United States Nuclear Regulatory Commission (USNRC), our research concentrates in assessing radiation doses caused by radioactive substances released from the nuclear power plant (NPP) Ninh Thuan 1 under the scenario of normal operation using software package NRCDose72 provided by the USNRC. The database including the released radioactive nuclides, meteorology, terrain, population and agricultural production activities have been collected and processed to build the input data for the model calculation. The wind rose distribution obtained from the meteorological data in a five-year period from 2009-2013 showed that the radioactive nuclides released to environment spread in two main wind directions which are North East and South West. The X/Q (s/m3) and D/Q (s/m2) qualities which are, respectively, the ratio of activity concentration to release rate and that of deposition density of radioactive nuclides to release rate were calculated within an area of 80 km radius from the NPP site using XOQDOQ. Population doses were calculated using GASPAR. The XOQDOQ and GASPAR are two specific softwares in NRCDose72 package.

关键词： NPP Radioactive Release Radiation Dose Population Dose X/Q and D/Q

Novel Criteria for Exponential Stability of Linear Non-Autonomous Functional Differential Equations

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 Systems Science & Complexity 2019年第2期32卷 479-495页

作者： PHAM HUU ANH Ngoc THAI BAO Tran CAO THANH Tinh NGUYEN dinh Huy Department of Mathematics Vietnam National University-HCMC International University Faculty of Information Systems Vietnam National University-HCMC University of Information Technology Department of Mathematics Vietnam National University-HCMC University of Information Technology Division of Applied Mathematics Faculty of Applied Sciences Vietnam National University-HCMC Ho Chi Minh city University of Technology

General linear non-autonomous functional differential equations are considered. Explicit criteria for exponential stability are given. Furthermore, the authors present an explicit robust stability bound for systems su... 详细信息

关键词： Exponential stability linear functional differential equations perturbation

Electrical Properties of CuO-Doped PZT-PZN-PMnN Piezoelectric Ceramics Sintered at Low Temperature

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2014年第11期2卷 20-27页

作者： Phan dinh Gio le Dai Vuong Ho Thi Thanh Hoa Department of Physics College of Sciences Hu&ecirc University Hu&ecirc Vietnam Faculty of Chemical and Environmental Engineering Hu&ecirc Industry College Hu&ecirc Vietnam

The 0.8Pb(Zr0.48Ti0.52)O3-0.125Pb(Zn1/3Nb2/3)O3-0.075Pb(Mn1/3Nb2/3)O3 (PZT-PZN-PMnN) + x wt% CuO piezoelectric ceramics, where x = 0.0, 0.05, 0.075, 0.10, 0.125, 0.150, and 0.175, have been fabricated by the conventional solid-state reaction method and the B-site Oxide mixing technique (BO). The effect of CuO on the sinterability, structure, and electrical properties of PZT-PZN-PMnN ceramics was systematically studied. The CuO addition significantly reduced the sintering temperature of the ceramics from 1150°C to 850°C. Experimental results showed that with the doping of CuO, all the ceramics could be well sintered and exhibit a dense, pure perovskite structure. The specimen containing 0.125 wt% CuO sintered at 850°C showed the good electrical properties: the density of 7.91 g/cm3;the electromechanical coupling factor, kp = 0.55 and kt = 0.46;the dielectric constant, ε = 1179;the dielectric loss (tand) of 0.006;the mechanical quality factor (Qm) of 1174;the piezoelectric constant (d31) of 112 pC/N.

关键词： Crystal Structure Dielectric Piezoelectric Constant Mechanical Quality Factor

Effect of three tree species on UV weathering of wood flour-HDPE composites

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 Forestry Research 2020年第3期31卷 1071-1079页

作者： Van dinh Nguyen Tat Thang Nguyen Aihong Zhang Jianxiu Hao Weihong Wang Key Laboratory of Biobased Material Science&Technology(Ministry of Education) Northeast Forestry UniversityHarbin 150040China

Eucalyptus urophylla, Acacia mangium, and Pinus caribaea are the primary species for the wood industry in Vietnam. Wood residues of these species were used to reinforce high-density polyethylene(HDPE) composites. The flexural or bending property, impact strength and surface color were evaluated after exposure to accelerated ultraviolet weathering up to 2000 h. The weathered surface was characterized by scanning electron microscopy(SEM) and Fourier transform infrared(FTIR) spectroscopy. The results indicate that A. mangium/HDPE composites had the lowest color change and least fading,and remained stable after 1500 h exposure. FTIR spectroscopy showed that the oxidation of the composites increased in parallel with duration of exposure by assessing the concentration of carbonyl groups on the surfaces. SEM showed that all three species reinforced composites exhibited similar severe cracks after 1000 h;however, at the end of the weathering test, E. urophylla and P. caribaea composites were more severely cracked than A. mangium composites. A. mangium also had the highest flexural strength, impact strength and crystallinity duringweathering. A. mangium is the most preferable among the three species to reinforce HDPE.

关键词： Eucalyptus urophylla Acacia mangium Pinus caribaea Polyethylene Weathering Color Mechanical property