Nuclear Science and Technology

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THE FEASIBILITY OF MEASUREMENT OF (α,p) REACTION WITH RADIOACTIVE BEAM ²²Mg
Nuclear Science and Technology - Tập 1 Số 2 - 2011
This paper shows the feasibility of experiment of 22Mg(α,p)25Al reaction in environment of X-rays burst with temperature in GK, where the pure radioactive beams 22Mg approximately 0.29 ~ 1.24 MeV/u (lab) with temperature T9 = 1~3 (GK), are created by primary reaction 3He(20Ne, 22Mg)n reaction and online filtered by CRIB. The projectile 22Mg bombards to secondary target filled with Helium gas...... hiện toàn bộ
#²²Mg(α #p) reaction #thick target method #CRIB spectrometer #²²Mg RI beam
Production of Radioisotopes and Radiopharmaceuticals at the Dalat Nuclear Research Reactor
Nuclear Science and Technology - Tập 4 Số 1 - 2014
After reconstruction, the Dalat Nuclear Research Reactor (DNRR) was inaugurated on March 20th, 1984 with the nominal power of 500 kW. Since then the production of radioisotopes and labelled compounds for medical use was started. Up to now, DNRR is still the unique one in Vietnam. The reactor has been operated safely and effectively with the total of about 37,800 hrs (approximately 1,300 hours per ...... hiện toàn bộ
#Radioisotope #Radiopharmaceutical #Labelled KIT #Nuclear Medicine
Identification of some nucleotide mutations in Waxy gene (BGIOSGA022241) of a mutant rice line
Nuclear Science and Technology - Tập 8 Số 3 - 2018
Waxy genes of the original variety and its mutant type were sequenced by Sanger method and compared through Nucleotide Basic Local Alignment Search Tool (BLASTN) to clarify differences. BLASTN result showed four nucleotide mutations in coding regions and 59 nucleotide mutations in noncoding regions. Four point mutations in coding regions were: the deletion of T/- at position 34 and the insertion o...... hiện toàn bộ
#Waxy gene #BGIOSGA022241 #amylose content #BLASTN #DNA marker development
Study on gamma-irradiation degradation of chitosan swollen in H₂O₂ solution and its antimicrobial activity for E. coli
Nuclear Science and Technology - Tập 4 Số 4 - 2014
Degradation of chitosan in swollen state with hydrogen peroxide solution (5% w/v) by γ-irradiation was investigated. Molecular weight (Mw) of irradiated chitosan was determined by gel permeation chromatography (GPC). Fourier transform infrared (FT-IR) and ultraviolet-visible (UV-vis) spectrawere analyzed to study the structure changes of degraded chitosan. The results showed that the chitosan of l...... hiện toàn bộ
#Chitosan #degradation #E. coli #gamma-irradiation #hydrogen peroxide
Thermodynamic Hadron-Quark Phase Transition of Chiral Nuclear Matter at High Temperature
Nuclear Science and Technology - Tập 7 Số 1 - 2017
Based on the extended Nambu-Jona–Lasinio (NJL) model with the scalar-vector eightpoint interaction [15], we consider what ultimately happens to exact chiral nuclear matter as it is heated. In the realm of very high temperature the fundamental degrees of freedom of the strong interaction, quarks and gluons, come into play and a transition from nuclear matter consisting of confined baryons and meson...... hiện toàn bộ
#Nuclear matter #Equations of state of nuclear matter #Chiral symmetries #Bag model #Quark-gluon plasma #Quark deconfinement #Equilibrium properties near critical points #Phase transitions and critical phenomena
The effect of gamma-irradiation on graphene oxide in a monoglyceride/ethanol solution
Nuclear Science and Technology - Tập 6 Số 3 - Trang 48-56 - 2016
Anh Tuyen Luu , Thuc Huy Ha , Thanh Duoc Nguyen , Binh Doan , Thu Hong Pham Thi
Gamma-irradiation effects on graphene oxide (GO) in a monoglyceride/ethanol (MG/EtOH) solution was investigated.  GO was dispersed in MG/EtOH solution (GOM) with the GO: MG ratio of 1:10 (w/w). The prepared GOM was irradiated by g-ray under nitrogen atmosphere in a range of absorbed dose from 0 to 50 kGy. The characteristics and morphology of reduced GOM were analyzed by Ultraviolet-visible (...... hiện toàn bộ
#reduction #monoglyceride #graphene oxide #ɣ-ray
IMPROVEMENT OF THERMAL STABILITY OF THE PLASTICIZED POLY(L-LACTIC ACID) PLLA BY RADIATION CROSSLINKING
Nuclear Science and Technology - Tập 2 Số 2 - 2012
Poly(lactic acid), PLLA was plasticized using low molecular weight polyethylene glycol, PEG 1000 in order to improve its toughness and thereby promoting the applications of PLLA based materials. Differential scanning calorimetry data showed that the presence of PEG was much reduced the glass transition temperature as well as melting point of PLLA. This reduction increased with the PEG content, but...... hiện toàn bộ
#Poly(L-lactic acid) #polyethylene glycol #plasticization #radiation crosslinking
Estimation of radiological parameters associated with mining and processing of coastal sand in Binh Dinh province, Vietnam
Nuclear Science and Technology - Tập 8 Số 3 - 2018
In Vietnam mining industry is significantly contributing to the socio-economic development. For the industrialization, many kinds of minerals are being exploited and processed that caused the Earth surface to be disconcerted leading to the increase of erosion of soil that possibly carries radioactive nuclides of the natural radioactive chains. Mining could cause increasing radioactive background t...... hiện toàn bộ
#Radiological parameters #ilmenite mineral #titanium #Binh Dinh #Vietnam
Study on gamma-irradiation degradation of chitosan swollen in H₂O₂ solution and its antimicrobial activityfor E. coli
Nuclear Science and Technology - Tập 3 Số 4 - 2013
Degradation of chitosan in swollen state with hydrogen peroxide solution (5% w/v) by γ-irradiation was investigated. Molecular weight (Mw) of irradiated chitosan was determined by gel permeation chromatography (GPC). Fourier transform infrared (FT-IR) and ultraviolet-visible (UVvis) spectrawere analyzed to study the structure changes of degraded chitosan. The results showed that the chitosan of lo...... hiện toàn bộ
#Chitosan #degradation #E. coli #gamma-irradiation #hydrogen peroxide
Status on development and verification of reactivity initiated accident analysis code for PWR (NODAL3)
Nuclear Science and Technology - Tập 6 Số 1 - 2016
A coupled neutronics thermal-hydraulics code NODAL3 has been developed based on the nodal few-group neutron diffusion theory in 3-dimensional Cartesian geometry for a typical pressurized water reactor (PWR) static and transient analyses, especially for reactivity initiated accidents (RIA).The spatial variables are treated by using a polynomial nodal method (PNM) while for the neutron dynamic solve...... hiện toàn bộ
#coupled neutronics thermal-hydraulics #nodal method #adiabatic method #improved quasi-static method #PWR #reactivity initiated accident #benchmark verification
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