Essential oil from leaves

Syzygium boisianum (Gagnep.) Merr. & L.M.Perry, locally named Tram bois, is widely distributed in primary or secondary forests of Vietnam, Thailand, and China. [6] For the first time, the current report provides information on chemical compositions in essential oil of S. boisianum leaves, collected from the northern part of central Vietnam. The obtained oil was also used to assess its antibacterial effects. The biological potential is highlighted by the molecular docking study.

6p dianmotminh02 03-05-2024 4 1   Download

Magnolia citrata Noot. & Chalermglin was collected in the Central Highlands of Vietnam and examined for its essential oils’ chemical compositions and antimicrobial activities. The essential oils were obtained from the leaves, twigs, and stem barks of M. citrata using hydrodistillation, then analyzed using Gas Chromatography-Mass Spectrometry (GC-MS) and evaluated for antimicrobial activities.

10p dianmotminh02 03-05-2024 1 1   Download

Vietnam is located in the tropical monsoon region where natural conditions are favorable for the formation and development of plants, especially high-value essential oil-bearing plants. The present study aimed to determine the chemical components and anti-acetylcholinesterase activity of Piper lolot leaves oil collected from Quang Nam-Da Nang.

8p vijaychest 24-04-2024 3 2   Download

Black pepper (Piper nigrum L.) is an industrial crop commonly grown in Vietnam. Besides its economic value, its processing released large amounts of by-products into the environment including leaves, flatterned seeds, and seed-bearing branches.

11p vimichaelfaraday 28-12-2023 4 3   Download

Piper betle (Piperaceae) is one of the essential thermophilic plants in Asia zone, widely cultivated in India, Sri Lanka, Malaysia, Thailand, Taiwan, and other Southeast Asian countries (Karak S et al., 2018). The present study aimed to determine the chemical composition and anti-acetylcholinesterase, nitric oxide suppressing activities of Piper betle leaves oil collected from Quang Nam-Da Nang.

6p viberkshire 09-08-2023 7 4   Download

In Vietnam, there was a report in 1996 on the chemical composition of the essential oils from the leaves and flowers of two cultivars of A. sinensis. Unfortunately, at that time, the authors were not able to investigate the root oil of these plants (Nguyen Xuan Dung et al., 1996). In the present study, we report on the chemical composition and antimicrobial activity of essential oils obtained from the roots, flowers, fruits, and a mixture of leaves and stems of A. sinensis cultivated in Hung Yen province, Vietnam.

9p vicaptainmarvel 21-04-2023 4 3   Download

Zanthoxylum avicennae (Lam.) DC. is a medicinal and aromatic plant, belong to the Zanthoxylum genus. The plant is found in some Asian contries, including Viet Nam. The various parts of this plant has been used to medicine and contain essential oils. In this study, the essential oil of Z. avicennae was isolated.

11p vidudley 20-02-2023 8 2   Download

The essential oils from the leaves and stems of Atalantia buxifolia in Vietnam were obtained by hydrodistillation and analysed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS).

9p vineville 08-02-2023 1 1   Download

The chemical composition, antioxidant properties and antibacterial activities of different extracts (water, ethanol, acetate ethyl and hexane) and essential oil from Platycladus orientalis leaves were analysed in this study. The essential oil was extracted by hydrodistillation, and its chemical composition was determined by gas chromatography coupled to mass spectrometry (GC-MS).

11p lyhuyenthu 31-01-2023 8 2   Download

The essential oils of Actinolema macrolema Boiss. (Apiaceae) were obtained by hydrodistillation in the first 3 (sample A) and the following 3 h (sample B) from crushed fruits and dried leaves (sample C), which were subsequently analyzed by GC and GC-MS. Overall, 64 components were characterized, representing 93% of the leaf oil. Thirty components were characterized from the fruit oil representing 95% of the first fraction and 90% of the second fraction consecutively.

10p langthannam 29-12-2021 11 0   Download

Laggera tomentosa Sch. Bip. ex Oliv. et Hiern (Asteraceae), an endemic Ethiopian medicinal plant, is traditionally used to treat various ailments. Previously, the chemical constituents of the essential oil (EO) of its leaves and inflorescence were documented. However, no data about the chemical compositions of other parts of the EOs of the plant have been reported to date. Moreover, there are no previous biological activity reports on any parts of the EOs of this plant.

10p tudichquannguyet 29-11-2021 12 0   Download

In Viet Nam, leaves of the plant are used to treat aching tendons, polio, and enteritis, while the roots are used for cough and malaria [31]. As part of our continuing efforts to identify readily-available essential oils for control of mosquitoes, we have assessed the essential oil from leaves of Vitex negundo (Table 1) growing in the wild in central Viet Nam for larvicidal action against Ae. aegypti.

16p nguaconbaynhay11 01-04-2021 11 2   Download

The major component of Eucalyptus globulus is 1,8-Cineole (Eucalyptol) and has been recognized as a high ovipositional repellent and mild mosquito feeding repellent [8]. Chemical instability, volatility, propensity for oxidation and poor water solubility of essential oils make them inconvenient for extensive use [9]. Cymbopogon winterianus, commonly known as citronella, is native to the tropical and subtropical areas, consisting of citronellol, citronellal, and geraniol as its major compounds [10]. Cymbopogon oil has been proven to exhibit low acute toxicity in laboratory animals [11].

8p nguaconbaynhay11 01-04-2021 10 2   Download

The essential oil from the leaves of Callicarpa arborea Roxb. growing wild in Viet Nam, was obtained by hydrodistillation and analyzed by gas chromatography – mass spectrometry. The major constituents of leaves of C. arborea were β-selinene (23.9 %), arturmerone (17.5 %) and α-copaene (8.9 %), with lesser concentrations of caryophyllene oxide (4.9 %) and ar-turmerol (3.9 %). The chemical composition of this essential oil sample is being reported for the first time.

8p nguaconbaynhay11 01-04-2021 14 1   Download

In this study, the essential oil from the leaves of bael tree was extracted and added as an additional income to the farmers along with its fruits, timber, fodder and other domestic usages. The essential oil yield from the leaves of bael tree was obtained by hydro-distillation. A socio-economic survey in the Bisht Village and Kirsali village of district Dehradun, Uttarakhnad was conducted and the existing role of bael tree in rural agroforestry and economy was also assessed.

4p chauchaungayxua10 19-03-2021 6 1   Download

The antioxidant activity of essential oils from leaves of Piper betle L. (T) and Cleistocalyx operculatus L. (V) and aerial parts of Ageratum conyzoides L. (H), indigenously grown in Thua Thien Hue province, Vietnam, is investigated. The quantitative structure–activity relationship (QSAR) model comprising 4-hydroxy-chromene-2H-one and its 26 derivatives is used to predict the radical scavenging activity of T, V, and H. The radical scavenging activity of the oils is experimentally determined with DPPH (1,1-diphenyl-2-picrylhydrazyl) via IC50 values.

9p nguaconbaynhay10 20-02-2021 11 1   Download

In the present study, the authors would like to report on chemical composition and antimicrobial activity of leaf essential oil of M. coriacea growing in Ha Giang Province, Vietnam.

10p angicungduoc7 09-09-2020 32 2   Download

In this study, we optimized conditions of extraction of essential oil from lemongrass (Cymbopogon citratus) stalks and leaves, using steam distillation device having an extent of 25 ÷ 30 kilograms of material per batch and approaching industrial scale. Using response surface methodology (RSM) with three factors that affect to the volume of essential oil obtained (mL/kg): material size (mm), water/material ratio (L/kg) and distillation time (minute). In the optimal condition of lemon grass essential oil distillation using steam distillation at 5.66 L water to 1 kg sample, 10.

8p quenchua7 07-08-2020 25 2   Download

Sixteen genotypes of ginger collected from different parts of the country were evaluated in randomized block design with two replications during kharif 2014. The results on correlation and path analysis revealed high positive and significant association of fresh rhizome yield per hectare with characters viz.

7p trinhthamhodang6 09-07-2020 36 2   Download

This research work was executed to determine chemical composition, anti-oxidant and anti-microbial potential of the essential oils extracted from the leaves and stem of Daphne mucronata Royle. From leaves and stem oils fifty-one different constituents were identified through GC/MS examination.

8p vijiraiya2711 27-05-2020 16 1   Download