Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh
1859-0128
Việt Nam
Cơ quản chủ quản: Đại học Quốc gia Thành phố Hồ Chí Minh
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Các bài báo tiêu biểu
OPTIMIZING LOCATION AND SIZING OF DISTRIBUTED GENERATION ON DISTRIBUTION SYSTEMS
Tập 10 Số 3 - Trang 55-62 - 2021
Recent changes in the electric utility infrastructure have created opportunities for many technological innovations, including the employment of distributed generation (DG) to achieve a variety of benefits. Both utility and customers benefit from DG. Among many benefits of distributed generation, there are many directions to solve problem of DG but all also want to accomplish to achieve the optima...... hiện toàn bộ
FABRICATION OF ANTIBACTERIAL WATER FILTER BY COATING SILVER NANOPARTICLES ON FLEXIBLE POLYURETHANE FOAMS
Tập 12 Số 7 - Trang 48-57 - 2020
In this paper, we fabricated silver-coated polyurethane foams and used it as a bacterial filter for contaminated drinking water. Flexible PU foams were soaked in silver colloidal solutions for 10hrs, then washed and air-dried at room temperature. The prepared silver colloidal solutions and silver-coated PU materials were characterized by several techniques including TEM, FE-SEMEDS, UV-Vis, ICP-AAS...... hiện toàn bộ
MEAT QUALITY: UNDERSTANDING OF MEAT TENDERNESS AND INFLUENCE OF FAT CONTENT ON MEAT FLAVOR
Tập 9 Số 12 - Trang 65-70 - 2021
This literature review focuses on meat tenderness and flavor, which are most important in determining meat quality, but difficultly predictable and maintained. Meat tenderness primarily relates to muscle tissues while meat flavor is mostly resulted from fatty tissues. Many studies have indicated that not only protein composition of muscle fibers but also handling and slaughtering conditions, genet...... hiện toàn bộ
MICROWAVE-ASSISTED EXTRACTION OF POLYPHENOLS FROM FRESH TEA SHOOT
Tập 9 Số 8 - Trang 69-76 - 2021
Fresh tea shoots (one shoot and two or three young leaves) were extracted using microwave-assisted extraction method (MAE). Several factors such as ethanol concentrations (0-99.5° (volume percentage)), material: solvent ratio (1:4 to 1:12), extraction time, oven power were studied to optimise conditions at laboratory scale. MAE archived good yield (82.46 %) after 6 minutes microwave radiation, tha...... hiện toàn bộ
EXISTENCE OF SOLUTIONS OF FUZZY CONTROL DIFFERENTIAL EQUATIONS
Tập 10 Số 5 - Trang 5-12 - 2021
Recently, the field of differential equations has been studying in a very abstract method. Instead of considering the behaviour of one solution of a differential equation, one studies its sheaf-solution (see[10-11]). Instead of studying a differential equation, one studies differential inclusion (see[9]). Especially, one studies fuzzy differential equation (a differential equation whose variables ...... hiện toàn bộ
EXISTENCE OF SOLUTIONS OF SET CONTROL DIFFERENTIAL EQUATIONS
Tập 10 Số 6 - Trang 5-14 - 2021
Recently, the field of differential equations has been studying in a very abstract method. Instead of considering the behaviour of one solution of a differential equation, one studies its sheaf-solution (see[8]). Instead of studying a differential equation, one studies differential inclusion (see[10]). Specially, one studies set differential equation ( a differential equation whose variables and d...... hiện toàn bộ
Development of MBA program-service quality measurement scale
Tập 16 Số 1 - Trang 35-46 - 2013
The purpose of this study is to develop the education quality measurement scale of Master of Business Administration (MBA) program in Vietnam. Cronbach’s Alpha, Exploring Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) were used to test the model with the support of SPSS and AMOS. The result of this study on the sample of 307 MBA students of Public and Private Universities in Ho Chi M...... hiện toàn bộ
TOTAL POLYPHENOLS, TOTAL CATECHINS CONTENT AND DPPH FREE RADICAL SCAVENGER ACTIVITY OF SEVERAL TYPES OF VIETNAM COMMERCIAL GREEN TEA
Tập 10 Số 10 - Trang 5-11 - 2021
Thirty types of commercial Vietnamese-brand teas (21 green teas, 5 black teas, 4 oolong teas) in Ho Chi Minh city were investigated for total polyphenols content (TPC acid gallic equivalent), total catechins content (TCC-catechin equivalent) and DPPH (2,2 diphenyl-1-picrylhydrazyl) free radical scavenger activity (RSA - Vitamine C equivalent). It was found that green tea had the highest TPC (15.06...... hiện toàn bộ
Synthesis of silica nanoparticles from rice husk ash
Tập 20 Số K7 - Trang 50-54 - 2018
Silica nanoparticles (SiO2 NPs) were synthesized from rice husk ash (RHA) by chemical treatment and calcination. The size of SiO2 NPs evaluated by transmission electron microscope (TEM) was of 20 - 50 nm and the size distribution of SiO2 NPs measured by dynamic laser scattering (DLS) was of Gaussian mode. The X-ray diffraction (XRD) pattern with only one peak at 2θ ~ 220 confirmed the amorphous ph...... hiện toàn bộ
#silica nano #rice husk ash #calcination #particle size
A preliminary study on gas metal arc welding-based additive manufacturing of metal parts
Tập 23 Số 1 - Trang 422-429 - 2020
Introduction: In the past three decades, additive manufacturing (AM), also known as 3D printing, has emerged as a promising technology, which allows the manufacture of complex parts by adding material layer upon layer. In comparison, with other metal-based AM technologies, gas metal arc welding-based additive manufacturing (GMAW-based AM) presents a high deposition rate and has the potential for p...... hiện toàn bộ
#Additive manufacturing #Gas metal arc-based additive manufacturing #Mild steel #Microstructures #Mechanical properties