Acetes species

Alocasia odora is a common plant species in Viet Nam. A phytochemical investigation of the ethyl acetate extract (EtOAc) of A. odora rhizomes collected in Tuyen Quang province led to the isolation and determination of five compounds, including three alkaloids, alocasin A, hyrtiosin B, hyrtiosulawesine (3), one mono-phenol, phydroxycinamic acid, and one fatty acid, myristic acid.

7p viamancio 04-06-2024 4 0   Download

Isaria cicadae, currently identified as Paecilomyces cicadae (Miq.) Samson (Cordycipitaceae, Hypocreales, Ascomycetes), is a parasitic fungus on cicadas and is considered a folk medicine in traditional medicine. In this research, the antioxidant activity of some extracts from the biomass and fruit bodies of Isaria cicadae F0004 isolated in Vietnam was investigated.

13p dianmotminh02 03-05-2024 4 1   Download

In this report, phytochemical constituents of Dischidia alboflava (Asclepiadaceae) collected in Bidoup Nui Ba National Park, Lamdong province, Vietnam were investigated for the first time.

4p viwarmachine 01-07-2023 5 2   Download

The active methanol extracts were successively partitioned with organic solvents such n-hexane, ethyl acetate and butanol to yield organic layers. Among of the resulting organic layers, n-hexane and ethyl acetate layers of the two plants displayed effective inhibition against various filamentous fungal and bacterial growth. Through bioassay guided isolation, 1,8 dihydroxy anthraquinones and their derivatives were isolated from those bioactive layers using silica gel, reverse phase and sephadex LH20 column chromatography.

7p mudbound 06-12-2021 15 1   Download

The antioxidant activities against DPPH free radical of crude extracts using ethyl acetate and methanol from ink sac, muscles, and bones of 5 squid species (Uroteuthis chinensis, Uroteuthis sibogae, Uroteuthis duvaucelii, Sepia esculenta, Sepioteuthis lessoniana) collected in Khanh Hoa waters were investigated. These activities ranged from 4.21% (ethyl acetate extract from ink of U. chinensis) to 54.51% (methanol extract from muscle of S. esculenta.).

12p inception36 30-11-2021 5 1   Download

Mint has been used extensively in traditional medicines, spices, and herbal teas throughout the world. Isolation of flavonoids from Mentha spicata and quantification of these compounds in selected clones of Turkish mints landraces were achieved. M. spicata was dried in shade and then boiled in water. After filtration, the aqueous extract was partitioned with ethyl acetate.

11p tudichquannguyet 29-11-2021 8 1   Download

New bis(isatins-thio/carbohydrazones) based on Schiff bases were prepared from terephthalaldehyde biscarbohydrazone and 5-substituted isatins in the presence of a drop of sulfuric acid under reflux in ethanol. Terephthalaldehyde bis(thio/carbohydrazone) was synthesized by the reaction of (thio)/carbohydrazide and terephthalaldehyde in the presence of a few drops of acetic acid under reflux in ethanol. The structures of these synthesized compounds were determined using IR, 1H NMR, and 13C NMR spectroscopy and elemental analysis.

20p tudichquannguyet 29-11-2021 14 1   Download

Chickpea is best nutritional crop in leguminous species, and biotic and abiotic stress affects the yield loss around 50 to 60 % .For preventing yield loss from this stress, it is necessary to developed high yield, qualitative variety of chickpea. In vitro methods are best technique for regeneration and development of transgenic variety of chickpea. In this investigation research to determine chickpea in vitro micropropagation was studied in genotypes; of chickpea JG62, JG63 JG315, VIJAY and Bhupdachana with explants immature cotyledonary and embryonic axis.

10p cothumenhmong11 11-05-2021 5 1   Download

By investigating the chemical constituents of the roots of Launaea sarmentosa, collected at Can Gio beach, Can Gio district, Ho Chi Minh city, nine compounds were isolated including amyrin acetate (1), -amyrin acetate (2), lupeol acetate (3), -taraksasterol acetate (4), luteolin (5), 4-allyl-2,6-dimethoxyphenol glucopyranoside (6), scorzoside (7), ixerisoside D (8) and 9-hydroxypinoresinol (9). To the best of our knowledge, all compounds were reported in other species, but this is the first time they were known in L. sarmentosa.

6p cothumenhmong11 06-05-2021 27 4   Download

A phytochemical study of the ethyl acetate extract (EtOAc) of Styrax annamensis leaves resulted in the isolation and determination of six known compounds, including three nor-neolignans type 2-phenylbenzofurans egonol (1), egonoic acid (2) and (–)-machicendiol (3), two lignans styraxin (4) and vladinol D (5), and a triterpenoid pomolic acid (6). The chemical structures of these compounds were determined by NMR spectroscopies, and MS data. This is the first time to isolate these compounds from S. annamensis species.

7p cothumenhmong11 06-05-2021 29 3   Download

Among all the species of Andrographis, Andrographis echioides is given importance recently for its excellent medicinal properties. The study of Andrographis echioides as anti-microbial agent was found necessary for gaining insight into this medicinal flora and its real value. The ethyl acetate extract of leaves recorded highest anti-fungal activity against all the selected pathogens viz., Pythium aphanidermatum, Phytophthora capsici, Macrophomina phaseolina...

6p chauchaungayxua10 19-03-2021 10 2   Download

In continuation of our search for bioactive compounds from Rourea species in Vietnam, four compounds including vomifoliol, boscialin, abscisic acid and p-coumaric acid were isolated from the ethyl acetate extract of the leaves of R. harmadiana. Their chemical structures were elucidated by different spectroscopic methods. This is the first study of the R. harmandiana. These compounds were firstly isolated from this species as well as from the genus Rourea.

4p nguyenxuankha_bevandan 13-08-2020 17 2   Download

The purpose of this study was to investigate the antibacterial and anti-fungal activities of four species Sargassum namely: Sargassum polycystum, Sargassum oligocystum, Sargassum crassifolium and Sargassum cristaefolium collected along the coastal areas of Diora-Zinungan Sta. Ana Cagayan, Philippines. Extracts of powdered seaweeds were prepared using sequential extraction with different organic solvents in order to increasing the polarity (Ethanol, n-hexane, dichloromethane and ethyl acetate and aqueous).

14p nguaconbaynhay6 24-06-2020 19 1   Download

7, 12-Dimethylbenz[a]anthracene (DMBA) is acting as immunosuppressor and it serves as a tumor initiator. Tumor promotion can be induced with treatments of 12-Otetradecanoylphorbol-13-acetate (TPA) in some models of two-stage carcinogenesis. This allows for a greatly accelerated rate of tumor growth, making many cancer studies possible. The DMBA damages many internal organs including liver, by inducing the production of reactive oxygen species, DNA-adduct formation and affecting the activities of phase I, II, antioxidant and serum enzymes.

15p nguaconbaynhay6 23-06-2020 13 1   Download

In vitro inhibition of the five different aroma chemicals were studies against three seed borne fungal pathogen species in the concentration range of 500 and 1000 ppm. All aroma chemicals were found effective, the eugenol inhibited the maximum mycelial growth significantly which is followed by terpineol. The phenyl acetate showed least mycelial inhibition of the fungi. Over all in the present investigation, eugenol was found most effective aroma chemical against the species of Curvularia, Drechslera and Bipolaris.

6p trinhthamhodang5 16-05-2020 11 1   Download

Methylobacterium spp. are a group of bacteria known as pink-pigmented facultative methylotrophs (PPFMs) capable of growing on single carbon compounds such as formate, formaldehyde, and methanol as well as on a variety of multicarbon compounds having no carbon-carbon bonds. They are distributed ubiquitously in the plant phyllosphere and rhizosphere and have been isolated from many species of plants. Methylotrophs are known to play an important role in increasing crop yield and soil fertility.

24p trinhthamhodang5 16-05-2020 10 0   Download

Trichoderma species, a class of plant beneficial fungi, may provide opportunistic symbionts to induce plant tolerance to abiotic stresses. Here, we determined the possible mechanisms responsible for the indole acetic acid (IAA) and 1-aminocyclopropane-1-carboxylate-deaminase (ACC-deaminase) producing strain of Trichoderma longibrachiatum T6 (TL-6) in promoting wheat (Triticum aestivum L.) growth and enhancing plant tolerance to NaCl stress.

18p vishikamaru2711 29-04-2020 13 1   Download

Drought and nitrogen (N) deficiency are two major limiting factors for forest productivity in many ecosystems. Elucidating the mechanisms underlying the influence of soil N availability on drought responses of tree species is crucial to improve tree growth under drought.

12p viharuno2711 24-04-2020 13 0   Download

Acetes is a good source of protein and is very low in fat and calories, making it a healthy food of choice for consumers but due to small in size it degrades faster by the action of microbes and enzymes. However, there is no information about the quality changes of Acetes during icing with reference to proximate composition, fatty acid profile, mineral profile and other biochemical changes.

9p caygaocaolon4 01-04-2020 16 1   Download

Antibacterial activity of six different species of fungal extracts viz., Aspergillus ochraceous, Paecilomyces variotii, Schizophyllum sp., Epicoccum sp., Metarhizium sp., Aspergillus niger were evaluated against ten serotypes of Bacillus thuringiensis to develop new bioactive secondary metabolites from the microbial sources. Fungal crude extracts were isolated by ethyl acetate solvent extraction method and product yields varied from 0.150g to 0.538g. Thin Layer Chromatography was carried out for detecting the small molecule compounds present in the crude extracts.

8p chauchaungayxua4 18-03-2020 14 2   Download