Vietnam Journal of Science and Technology
ACI (2015-2021)SCOPUS (2019-2023)
2815-5784
2525-2518
Việt Nam
Cơ quản chủ quản: Publishing House of Natural Science and Technology, Viện Hàn lâm Khoa học và Công nghệ Việt Nam , Viện Hàn lâm Khoa học và Công nghệ Việt Nam
Lĩnh vực:
Chemistry (miscellaneous)Environmental Science (miscellaneous)
Các bài báo tiêu biểu
Finite element modelling for free vibration response of cracked stiffened FGM plates
Tập 58 Số 1 - 2020
This paper presents the new numerical results of vibration response analysis of cracked FGM plate based on phase-field theory and finite element method. Effects of geometrical and material properties on the vibration behaviors of the plate are investigated in this work. The computed results show that the crack and stiffener have a strong influence on both the vibration responses and vibration mode...... hiện toàn bộ
#finite element #phase-field theory #FGM #crack #stiffened plates #vibration
EFFECT OF NANOSILICA FROM RICE HUSK ON THE GROWTH ENHANCEMENT OF CHILI PLANT (Capsicum frutescens L.)
Tập 54 Số 5 - Trang 607 - 2023
Nanomaterials hold great promise of improved plant disease resistance, controlled release of agro-chemicals, enhanced plant growth, etc. In this study, the effect of nanosilica (10 – 30 nm) prepared from rice husk on the growth promotion of chili plant in green house was carried out. The experiment of nanosilica treatment by foliar spraying was arranged in a factorial design with 3 replications at...... hiện toàn bộ
#Nanosilica #rice husk #growth #chili plant
Penetration rate prediction for percussive drilling with rotary in very hard rock
Tập 54 Số 1 - 2016
This paper is the following part of our project to predict the penetration rate for percussive drilling with rotary in very hard rock. As results in [1] have been shown that the rate of penetration was strong influent by Brazilian tensile strength and it was exist the correlation between the rate of penetration and the rock properties. Yet, the study was valid on six hard rocks in experimental res...... hiện toàn bộ
#Hard rocks #ROP #drilling #mathematical model #numerical model.
A novel design of the Roots blower
Tập 57 Số 2 - 2019
This paper reports a novel curve developed from non - circular gearing theory, which can be applied in rotor profile design of the two - lobe Roots blower. The formulas for calculating the volumetric efficiency and specific flow rate of the blower have also been established. To evaluate this type of the Roots blower, the volumetric efficiency and specific flow rate are being compared with those pa...... hiện toàn bộ
#hydraulic machine #Roots blower #profile #flow
Phenolic compounds from Callistemon citrinus leaves and stems
Tập 54 Số 2 - 2016
In the search for bioactive constituents from Vietnamese plants, the leaves and stems of Callistemon citrinus (Curtis) Skeels were selected for chemical investigation. Phytochemical analysis of plant led to the isolation of eight phenolic compounds including two flavonoids (eucalyptine (1) and 8-demethyleucalyptine (2)), two alcohols (blumenol A (3), n-tetratriacontanol (4)), three benzoic acid d...... hiện toàn bộ
#Callistemon citrinus #flavonoid #triterpenoid.
THE EFFECTS OF SILVER NANOPARTICLES ON GROWTH OF Chrysanthemum morifolium Ramat. cv. "JIMBA" IN DIFFERENT CULTURAL SYSTEMS
Tập 55 Số 4 - 2017
Silver nanoparticles (SNPs) are one of metallic nanoparticles widely applied in many fields. Research of SNPs application in plant tissue culture has been gaining attention in recent years. Moreover, novel plant tissue culture systems have been researched and developed for improving SNPs uptake capability in medium. In this study, we investigated effects of SNPs on Chrysanthemum morifolium ramat. ...... hiện toàn bộ
Electrodeposition of hydroxyapatite/functionalized carbon nanotubes (HAp/fCNTs) coatings on the surface of 316L stainless steel
Tập 55 Số 6 - 2017
The coatings of hydroxyapatite/functionalized carbon nanotubes (HAp/fCNTs) were successfully synthesized on the surface of 316L stainless steel (316L SS) by electrodeposition. To improve the dispersion of CNTs into the electrolyte, CNTs were functionalized in the mixture of 67 % HNO3 and 98 % H2SO4 before electrodeposition coatings to form fCNTs. Different amounts of fCNTs were incorporated into ...... hiện toàn bộ
#Hydroxyapatite #fCNTs #HAp/fCNTs nanocomposite #316LSS #electrodeposition
Biodiversity and distribution patterns of free-living nematodes communities in Ba Lai river, Ben Tre province
Tập 56 Số 2 - 2018
Nematodes communities in Ba Lai river, Ben Tre province were investigated in September of 2015 (eight stations from estuary to upstream). The results showed that the nematodes communities have characterized by high density and biodiversity, providing useful information of nematodes assemblages in freshwater habitas, in particular inland river. Also the results indicated that the distribution of ne...... hiện toàn bộ
#Ba Lai dam #Ben Tre province #biodiversity #dam effect #distribution #nematodes communities
Chemical and pharmacological evaluation of Manglicolous lichen Graphis ajarekarii PATW. & C. R. KULK.
Tập 57 Số 3 - 2019
The chemical examination of ethanolic extract of manglicolous lichen Graphis ajarekarii (Ga-Et) resulted in isolation of three known metabolites – chiodectonic acid (1), graphenone (2) and graphisquinone (3). All the isolates (1-3) and Ga-Et were screened against DPPH and superoxide free radicals, six different cancer cell lines and one normal human cell line (NHME). This work is the first report ...... hiện toàn bộ
#manglicolous lichen #antioxidant #cancer #Sulforhodamine B assay
Membrane distillation for seawater desalination applications in Vietnam: potential and challenges
Tập 55 Số 6 - 2017
Desalination of seawater using membrane distillation (MD) can be a practical approach to mitigating the fresh water scarcity in Vietnam. This paper provides a comprehensive review of the seawater MD desalination process. The fundamentals of the MD process including configurations, membrane modules, membrane properties, and heat and mass transfer mechanisms together with approaches to enhancing hea...... hiện toàn bộ
#membrane distillation #seawater desalination #fresh water scarcity #desalination processes