Hue University Journal of Science: Natural Science
2615-9678
Cơ quản chủ quản: N/A
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Các bài báo tiêu biểu
In vitro antioxidant activity and Content of compounds from Curculigo orchioides rhizome
- 2020
Curculigo orchioides Gaertn. is used in traditional medicine in Vietnam. Its
antioxidant potential was evaluated through DPPH radical scavenging and the
total antioxidant capacity method. The data resulted from DPPH radical
scavenging activity indicate that Curculigo orchioides display high activity
with a low IC50 value (22.78μg/mL), approximately 1.5 times less than that of
curcumin (34.34 μg/mL...
#Curculigo orchioides #antioxidant activity #polysaccharide #saponin – triterpenoids #total phenolic content #total flavonoid content.
Chemical composition and acetylcholinesterase inhibitory activity of essential oil from rhizomes of Distichochlamys benenica
- 2020
Twenty-seven constituents were identified by using GC/MS, representing 99.57% of
the rhizome oil of Distichochlamys benenica. The major constituents of the
essential oil are 1,8-cineole (54.39%), β-pinene (7.50%), (E)-citral (7.26%),
and (Z)-citral (6.79%). The rhizome essential oil has anti-acetylcholinesterase
activity with an IC50 value of 136.63 ± 2.70 mg/mL.
#Zingiberaceae #Distichochlamys benenica #essential oil #acetylcholinesterase #1 #8-cineole
NEW RECORDS AND AN UPDATED CHECKLIST OF AMPHIBIANS (AMPHIBIA) FROM PHU YEN PROVINCE, VIETNAM
Tập 126 Số 1B - Trang 81-94 - 2017
Abstract. We herein provide an updated checklist of 33 amphibian species from
Phu Yen Province, Vietnam. Eight of them are reported for the first time from
this province, namely Ophryophryne gerti, O. hansi, Xenophrys major,
Glyphoglossus molossus, Kaloula indochinensis, Microhyla berdmorei, M.
nanapollexa, and Amolops spinapectoralis. Additional data of morphological
characters of afore mentioned...
Effect of Dzyaloshinskii–Moriya interaction on Heisenberg antiferromagnetic spin chain in a longitudinal magnetic field
Tập 130 Số 1D - Trang 31-38 - 2021
Using functional integral method for the Heisenberg antiferromagnetic spin chain
with the added Dzyaloshinskii-Moriya Interaction in the presence of the
longitudinal magnetic field, we find out expression for free energy of the spin
chain via spin fluctuations, from which quantities characterize the
antiferromagnetic order and phase transition such as staggered and total
magnetizations derived. Fr...
#antiferromagnetic spin chain #Dzyaloshinskii–Moriya interaction #transverse spin fluctuations #functional integral method
ẢNH HƯỞNG CỦA MÔI TRƯỜNG NUÔI CẤY LÊN KHẢ NĂNG SINH TRƯỞNG CỦA CALLUS CÂY BÁCH BỆNH (Eurycoma longifolia Jack)
Tập 128 Số 1E - Trang 69-76 - 2019
Cây bách bệnh (Eurycoma longifolia Jack) thuộc chi Eurycoma, là một trong những
cây thuốc phổ biến ở Đông Nam Á. Trong nghiên cứu này, chúng tôi đã đánh giá khả
năng sinh trưởng của callus cây bách bệnh dưới ảnh hưởng của các chất điều hòa
sinh trưởng khác nhau nhằm tạo nguyên liệu để sản xuất eurycomanone sau này. Kết
quả nghiên cứu cho thấy phối hợp nhiều chất điều hòa sinh trưởng cho hiệu quả
c...
Effect of plant density and foliar fertilizer spray on growth and yield of netted melon (Cucumis melo L.) ‘Inthanon RZ’
Tập 130 Số 1B - Trang 27-34 - 2021
The cultivation of netted melon is becoming popular in vegetable farms in
Vietnam. The netted melon cultivar ‘Inthanon RZ’ was evaluated for its growth
ability, yield, fruit quality, and economic efficiency when treated with
densities of 38,000 and 33,000 plants/ha and four foliar fertilizer sprays:
Biotic foliar AMINO ACID 1000, NPK NUTRI-GOLD 29-10-10 + 3 MgO + TE, NPK
HAI-CHYODA 14-17-12 + 12 S...
#Biotic foliar #Inthanon RZ #melon #plant density #Biotic fl #Biotic foliar #Inthanon RZ #Melon #Plant density
Preparation of cuprous‐oxide nanoparticles using ascorbic acid as reducing agent and its photocatalytic activity
Tập 128 Số 1D - Trang 31-37 - 2019
In this present paper, cuprous‐oxide (Cu2O) nanoparticles were successfully
fabricated using ascorbic acid as a reducing agent. The purity and
characteristics of Cu2O nanoparticles were determined with XRD and FT‐IR
techniques. The orphology and particle size of the material were characterized
using SEM and TEM, respectively. The results show that the concentration of
sodium hydroxide affects the ...
#cuprous-oxide nanoparticles #ascorbic acid #photocatalytic degradation #photocatalytic activity #Rhodamine B
ULTRASOUND-ASSISTED SYNTHESIS OF MAGNETITE NANOPARTICLESBY CO-PRECIPITATION METHOD
Tập 126 Số 1C - Trang 29-36 - 2017
In the present paper, the traditional co-precipitation method in synthesis of
magnetite (Fe3O4) nanoparticles have been procedurally and ultrasonically
altered. The effects of NH3 solution adding paths to precursor solution, and
ultrasonic assistance were indicated and demonstrated through specific
experiments, and suggested explanations for observed phenomena. Characteristic
information has prove...
THERMOELECTRIC PROPERTIES OF LaFeO3 SYSTEM DOPED WITH Ti, Co, AND Cu
Tập 126 Số 1B - Trang 139-144 - 2017
A LaFeO3 system doped with Ti, Co, and Cu was manufactured using the solid-state
reaction method. It was sintered at 1250 °C and 1290 °C for 10 hours with a
heating rate of 3 °C/min. The materials have a single-phase and
orthogonal-perovskite structure which is characteristic of the Pnma space group.
The unit cell volume of the materials increases when Ti, Co, Cu replace Fe+3.
The size of the part...
Non-classical properties and generation schemes of superposition of multiple-photon-added two-mode squeezed vacuum state
Tập 130 Số 1B - Trang 5-12 - 2021
In this paper, we study some non-classical properties and propose the generation
schemes of the superposition of multiple-photon-added two-mode squeezed vacuum
state (SMPA-TMSVS). Based on the Wigner function, we clarify that this state
is a non-Gaussian state, while the original two-mode squeezed vacuum state
(TMSVS) is a Gaussian state. Besides, the SMPA-TMSVS is sum squeezing, as well
as diff...
#Photon-added two-mode squeezed vacuum state #Wigner function #sum squeezing #difference squeezing #generation scheme