Antimicrobial activity of 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

The biological activities of E. ciliata essential oils (Ec EOs) in Vietnam have yet to be thoroughly studied and have received less attention than other species of genus Elsholtzia in the world. In this study, we evaluated the antioxidant, antimicrobial, and anticancer of Ec EOs and examined their chemical compositions. Fresh leaves of E. ciliata were hydro-distilled to yield essential oil of 0.82% dry weight, respectively.

12p 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

The genus Dialium belongs to the Caesalpinioideae family, consisting of approximately 30 species distributed in the tropical regions. Secondary metabolites from the Dialium genus have been reported to exhibit various biological activities including antioxidant, cytotoxicity and antimicrobial activities.

6p viengels 25-08-2023 6 2   Download

This study aimed to quantify the phenolic contents and the antioxidant capacities of leaf extract powders from three Myrtaceae plants, namely Cleistocalyx operculatus (Vietnamese name: Vối), Psidium guajava (Ổi), and Rhodomyrtus tomentosa (Sim), investigate their inhibitive activities on the growth of bacteria isolated from spoiled shrimps, and evaluate their values as preservative agents in the cold storage of Pacific whiteleg shrimps (Penaeus vannamei).

15p viengels 25-08-2023 7 2   Download

The prevalence of Gram-positive Staphylococcus aureus in infectious diseases is increasing in Vietnam for recent years. Therefore, novel class of antibiotic or active compounds is indispensable to treat this common worldwide pathogen. In the present study, we investigated the antibacterial activities of Cleistocalyx operculatus (Roxb.) Merr. et Perry leaves collected in Quang Nam.

5p viwarmachine 01-07-2023 1 1   Download

The aims of this study were to investigate the antioxidant and antimicrobial activities of some spice plants including cinamon bark, ginger root, curcuma root and piper leaves. The terms for investigation of antioxidant activity were DPPH radical scavenging activity and ferric reducing power.

7p vidoctorstrange 06-05-2023 4 3   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 5 3   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

In this study, biogenic copper and zinc oxide nanoparticles (G-ZnONPs and G-CuONPs) were synthesized by the green synthesis method using Malva parviflora L. (Millow) leaf extract and the obtained nanoparticles were characterized in detail with UVVis, FTIR, SEM, XRD. The antibacterial properties of the synthesized nanoparticles on gram-positive and gram-negative bacteria were investigated and it was found that the nanoparticles had high antimicrobial activity in the results of the experiments.

16p tudichquannguyet 29-11-2021 26 2   Download

The objectives of the thesis: Isolation and determination of chemical structures of the isolated compounds from the leaves of Excoecaria agallocha L. and Excoecaria cochinchinensis Lour.; studied the cytotoxic, anti-inflammatory, and antimicrobial activities of the isolated compounds to find the bioactive compounds.

27p closefriend09 16-11-2021 24 3   Download

The main use parts of the tree are fruit, stem, and leaf that can be eaten as vegetables. This study aims to (1) identify several bioactive chemical compounds in the stems and leaves of bitter melon trees in the forests in the district of Mang Yang, Gia Lai province; (2) evaluate the nutrient composition, antioxidant activity, and antimicrobial ability of fresh juice and extract with ethanol 70°.

6p chauchaungayxua12 11-07-2021 9 1   Download

Phytochemical and antimicrobial screening analysis of Mangifera indica and Carica papaya indicated the presence of alkaloid, saponin, flavonoid, steroid, tannin, phenol and glycoside. Extract of Mangifera indica and Carica papaya were investigated for their antimicrobial activities. The ethanolic extract produced zone of inhibition higher in diameter than aqueous extract against Escherichia coli, Pseudomonas spp, Staphylococcus spp, Streptococcus spp and salmonella spp.

7p caygaocaolon8 07-11-2020 17 1   Download

Cassia auriculata used for long period in various chronic diseases therapeutically. The present work attempts to investigate phytochemical studies of leaves and pods of Cassia auriculata. Hence it have antimicrobial, antioxidant, anti-inflammatory properties and the present study of aqueous and methanol extracts were used to identify the medicinal properties of Cassia auriculata. With reference to the above claims, the results of phytochemical, antioxidant, antimicrobial, anti-inflammatory, chromatography studies of leaves and pods have been described.

10p nguathienthan8 20-10-2020 15 2   Download

The present study deals with the synthesis of silver nanoparticles using leaves extracts of Azadirachta indica (Neem). These nanoparticles were prepared were screened for antimicrobial activity against biofilm producing S. aureus.

7p nguathienthan8 20-10-2020 8 1   Download

Pharmacologic studies on the bark and leaves of Melia dubia plant show effective antimicrobial activity, cytotoxic function, antiulcer activity, hypoglycemic activity, hypotensive effect. In this due the study was carried out to find out the biochemical constituents from Melia dubia.

7p quenchua8 29-09-2020 17 1   Download

In present study Vitex negundo leave’s extract was used to assess the antibacterial activity on cotton fabric. Extraction of phytochemicals was carried out using different solvents like ethanol and aqueous. Total phenolic content (TPC) results revealed that TPC of Vitex negundo leave’s extract were highest in case of ethanolic extraction as compared to aqueous. It was observed that mild to moderate antibacterial properties were present in ethanolic extract as compared to aqueous extract. Clear zone of inhibition was observed on cotton fabric against E coli and S. aureus.

10p caygaocaolon7 18-09-2020 15 2   Download

This study seeks to evaluate the antimicrobial activity of the 80% methanolic and ethanolic extracts of the dried leaves of Jatropha curcas and Chlorophora excelsa using the same extraction method, solvent concentration, test bacteria and susceptibility testing methods via agar dilution and agar diffusion techniques.

6p cothumenhmong7 09-09-2020 12 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 the ethno-pharmacological approach, local knowledge about the potential uses of the plants is very useful as compared to the random approach where indigenous knowledge is not taken into consideration. Phytochemicals produced in plants are secondary compounds responsible for metabolic activities and defense in purpose. Phytochemicals are produced by specific biochemical pathways, which occur inside the plant cells.

9p angicungduoc6 20-07-2020 12 2   Download