Trường Đại học Khoa học Tự nhiên, Đại học Quốc gia Thành phố Hồ Chí Minh
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Influence of plant growth regulators on the rapid propagation buds of Dendrobium officinale Kimura et Migo
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 1 Số T2 - Trang 29-38 - 2017
Dendrobium officinale Kimura et Migo has been known for a long time as a
precious orchid, which is used for medicine and functional foods that are widely
commercialized in the world. The nodal explants could be obtained in high
efficiency, good quality and uniform seedlings on multiplication vegetative in
vitro. They can be propagated in large quantities in a short time. The studied
results showed...
Fabricating and investigating the influence of the temperature on electrical and optical properties of the p-type SnO2:Ga (GTO) thin films prepared by DC magnetron sputtering
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 19 Số 4 - Trang 137-146 - 2016
Transparent Ga-doped tin oxide (GTO) thin films were fabricated on quartz
glasses from (SnO2 + Ga2O3) mixture ceramic target by direct current (DC)
magnetron sputtering in Ar gas at the pressure of 4.10-3torr. X ray diffraction
(XRD), Hall - effect and UV-vis spectra measurements were performed to
characterize the deposited films. Films were deposited directly with different
temperatures in order ...
Co-doping of Ni, Cu on CoMo/TiO2 catalyst and their effect on the hydrocracking reaction for the synthesis of BHD (bio-hydrofined-diesel) from animal fat and vegetable oil
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 18 Số 4 - Trang 117-127 - 2015
BHD (Bio hydrofined diesel) was synthesized from animal fat and vegetable oil by
hydrodeoxygenation with CoMo/TiO2 catalyst. To improve the quality and the
quantity of BHD, the synthesis co-doping of Ni, Cu on CoMo/TiO2 catalyst and
catalytic performance were investiagated. The catalytic performance of various
Ni, Cu- CoMo/TiO2 catalysts were studied for the hydrodeoxygention reaction at a
range o...
Investigation of chemical reduction of graphene oxide with many reduced agents
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 18 Số 2 - Trang 197-210 - 2015
Graphene based on graphite oxide prepared by chemical reduction method is always
interesting for scientists since the early days of discovery of graphene. Many
different reducing agents are recommended, however every reducing agent is only
active on one type of functional groups on the structure of graphene oxide. For
studying clearly the reducing ability of the chemical reducing agent, this
resea...
Synthesis of ligand 4,4’-(1h,1’h-5,5’-bibenzo[d]imidazol-2,2’-diyl) dibenzoic acid: a new linker for MOFs
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 16 Số 2 - Trang 61-69 - 2013
A novel ligand 4,4’-(1H,1’H-5,5’-bibenzo[D]imidazol-2,2’-diyl)dibenzoic acid,
was synthesized and fully characterized by various spectroscopic methods such
FT-IR, 1H, 13C-NMR and DEPT analysis. MOFs material derived from this ligand and
zinc nitrate has been synthesized by solvothermal method. The structure of the
new MOFs was examined by powder XRD, thermogravimetric analysis (TGA) and the
nitrog...
The second-order contingent derivative of generalized perturbation maps
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 1 Số T5 - Trang 203-213 - 2018
In the paper, we give some remarks on [1]. Then, we modify main results
concerning the sum rule of second-order contingent derivatives for set-valued
maps and its application to the sensitivity analysis of generalized perturbation
maps. The obtained results are new and better than those in [1]. Some examples
are proposed to illustrate our results.
Evaluation and comparison of dose distributions for nasopharyngeal carcinoma patients treated by Jaws-Only IMRT technique and by 3D-CRT technique at Dong Nai General Hospital
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 1 Số T4 - Trang 79-87 - 2017
The goal of radiation therapy is twofold: maximize the possibility of destroy
malignant cells while minimizing the damage to healthy tissue. The introduction
of intensity modulated radiation therapy (IMRT) technique has brought
improvements in this goal. Multi-leaf collimator (MLC) is a useful tool for
IMRT. However, the use of MLC is not necessarily mandatory. The Panther
Treatment Planning Syste...
APPLYING KRIGING TO PREDICT THE DISTRIBUTION OF THE HOLOCENE SOFT SOIL STRATUM IN THE URBAN AREA OF HOCHIMINH CITY
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 10 Số 2 - Trang 43-54 - 2021
The Holocene soft soil layer in Hochiminh city is a special geotechnical unit to
geologists and geotechnical engineers. Understanding the distribution of this
special unit is very helpful for urban planners, investors, managers and
geologists. Besides knowledge driven methods, data-driven methods, especially
Kriging, are commonly used nowadays to determine the distribution of geological
objects. H...
SOME FINITE ELEMENT MESHS IN THE FINITE ELEMENT METHOD
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 3 Số 7&8 - Trang 12-17 - 2021
We contruct in this paper some finite element meshs in the finite element
method. We hope that the computation of approximate functions using the above
meshs is quicker than the method relying on the known mesh.
ON ONE OF HERSTEIN'S CONJECTURES
Tạp chí Phát triển Khoa học và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 12 Số 11 - Trang 5-10 - 2020
Let D be a division ring with the center F. We say that N is a subgroup of D
with understanding that N is in fact a subgroup of the multiplicative group D*
of D. In this note we disscus the conjecture which was posed by Herstein in 1978
[2, Conjecture 3]: If N is a subnormal subgroup of D which is radical over F,
then N is contained in F. In his paper, Herstein himself showed that the
conjecture i...
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