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
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
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......
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......
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
In vitro antioxidant activity and bioactive compounds from Calocybe indica
Tập 130 Số 1D - Trang 15-22 - 2021
Nowadays, the use of mushrooms in medicine is ubiquitous and has achieved particular success. The antioxidants in mushrooms can deactivate free radicals. This study assesses the antioxidant potential of mushroom Calocybe indica with the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging methods and the total antioxidant ......
#Calocybe indica #antioxidant activity #polysaccharide #triterpenoid #total phenolics #total flavonoid
SYNTHESIS AND BIOLOGICAL ACTIVITY EVALUATION OF SOME DERIVATIVES SYNTHESIZED FROM CURCUMIN AND CURCUMIN ANALOG
Tập 126 Số 1B - Trang 119-125 - 2017
The acetohydrazides A5 containing an isoxazole ring and B5 containing an indazole ring were synthesized from the corresponding acetohydrazide derivatives with acetic anhydride in about 80% high yield. Also, two acetohydrazones B6 and B7 were driven from acetohydrazide B4 by condensation reaction. Bioactivity testes showed that none of them were active against on bacteria except acetohydrazones B7......
#thermodynamic #harmonic trap #ideal Fermi gas