Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh
2588-106X
Việt Nam
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Các bài báo tiêu biểu
Chemical constituents of Euphorbia tirucalli L.
Tập 2 Số 5 - Trang 76-82 - 2019
This article was retracted on 15 December 2021 by authors. Euphorbia tirucalli
has not been chemically studied much in Vietnam. This research described the
isolation and elucidation of compounds isolated from the plant collected in Binh
Thuan. Multiple chromatographic methods were applied, including normal phase
silica gel column chromatography and thin-layer chromatography. Seven compounds
were...
Application of MIKE 21 FM modelling to simulate the water quality at the coastal area Đình Vũ
Tập 1 Số T4 - Trang 282-292 - 2017
The MIKE 21 FM model, developed by the Danish Hydraulic Institute, is a
distributed system model that is used in hydrological calculations, water
quality simulation, sediment transport calculations, resources and water
environment in rivers, estuaries, coastal areas, and seas... This paper is an
initial step in setting and establishing a set of model's parameters for
simulating contaminant transpo...
Electrochemical properties of C/SiO2 prepared from rice husks with LiPF6 and LiClO4 salts as electrolytes
Tập 6 Số 1 - Trang 1933-1942 - 2021
The C/SiO2 materials were prepared from rice husks used as anode electrodes for
Lithium-ion batteries. The XRD results show that the diffraction peak had a
large half-width and the material existed in an amorphous form. The first peak
at the position 20o - 27o (2θ), was characterized by amorphous silica and
amorphous carbon and the second peak at the position 43o - 44o was characterized
by amorpho...
Inventory and mapping the air emissions from transportation activities in Ho Chi Minh city
Tập 3 Số 2 - Trang 100-114 - 2019
Ho Chi Minh City plays a role as a leading economic and social center in the
South of Vietnam, together with the urbanization, transportation system is being
rapidly developing, resulting in an increase in emissions from these activities,
and worsen the quality of the city. Therefore in this study, emission inventory
for transportation has been conducted using the EMISENS model and then using GIS
...
Petrographic characteristics and zircon UPb geochronology of granitogneiss rocks in the Chu Lai - Kham Duc area (Quang Nam province)
Tập 1 Số 6 - Trang 258-272 - 2018
The early Palaeozoic granitogneiss association in the Chu Lai - Kham Duc area
(Quang Nam) is a large area of hundreds of km2, along southern of the East –
West ductile deformation zones (Tam Ky – Phuoc Son fault zone), which is studied
in detail in different geologic maps scales by the geologists, which is named
Chu Lai complex. The five samples studied in detail are composed mainly of
granitognei...
Optimization of protein extraction from green algae Chaetomorpha sp. by response surface methodology
Tập 3 Số 3 - Trang 136-143 - 2019
Green brackish algae Chaetomorpha sp. are easily found in shrimp ponds in Mekong
Delta, Vietnam. They can also be co-cultured with shrimps in brackish water
shrimp ponds to increase shrimp health and yield. Chaetomorpha sp. algae contain
high amount of protein from 10 to 20% w/w db, including water soluble protein
and alkaline-soluble protein with over 88% total protein. Dried material were
used f...
#Chaetomorpha sp. #cellulase #response surface methodology #green brackish algae #optimization #protein extraction
Microplastic pollution in clam (Meretrix Lyrata Sowerby, 1851) at Mekong Delta river, Vietnam
Tập 5 Số 3 - Trang 1443-1454 - 2021
The problem of microplastic pollution (<5 mm) is becoming one of the biggest
challenges facing countries. One of the problems is the export value of seafood
products. Therefore, to assess the microplastic accumulation in clam (Meretrix
lyrata), this study investigated the concentration of microplastics (MPs) in
clam and their habitat in four clam culture beds (Tan Thanh, Ba Tri, Ganh Hao,
and Ba D...
Investigating and optimizing a method to determine atmospheric mercury for application in Ho Chi Minh City, Viet Nam
Tập 7 Số 1 - Trang 2552-2560 - 2023
Mercury (Hg) is a toxic of global concern due to its bioaccumulation in the
environment and the atmosphere which is an important environment in the
biogeochemical cycle of Hg. IO-5 method (US-EPA) is the most common analysis
method to measure the concentration of atmospheric Hg. However, few studies have
been done in tropical monsoonal areas such as Ho Chi Minh City (HCMC). This
paper reported the...
#Thủy ngân; IO-5; WA-5F; Không khí; Thành phố Hồ Chí Minh
Preparation of magnetic CoFe2O4/Cellulose nanocrystals composite as an catalyst for the methylene blue degradation
Tập 6 Số 2 - Trang 2064-2075 - 2022
A magnetic CoFe2O4/cellulose nanocrystal (CoFe2O4/CNCs) composite was
successfully prepared by a facile hydrothermal method and characterized as a
Fenton-like catalyst for the methylene blue (MB) degradation. The structure and
properties of this composite were characterized by X-ray diffraction (XRD),
Fourier -Transform Infrared Spectroscopy (FT-IR), Field Emission Scanning
Electron Microscope (FE...
Fabrication of Al/Al2O3/Ag SERS substrate by the corrosion method to detect ketoprofen
Tập 5 Số 3 - Trang 1401-1409 - 2021
In this work, we studied and fabricated SERS substrate (surface-enhanced Raman
scattering) substrates based on Al/Al2O3/Ag to detect ketoprofen solution at low
concentrations. Silver nanoparticles were decorated on Al2O3/Al substrate due to
a displacement reaction. By changing the volume ratios of
hexadecyltrimethylammonium bromide (CTAB) to AgNO3 and annealing temperature,
the SERS substrates wer...
#Keywords: SERS #ketoprofen #Rhodamine 6G #CTAB #enhancement factor (EF).