Antibacterial activities

This study contributes to the scientific data on binary combinations by investigating the synergistic antibacterial activity of the binary combination of MM or MQ EOs with thymol. This research is significant as it contributes to the global effort to combat antimicrobial resistance, providing a potential solution to this pressing public health challenge.

13p viling 11-10-2024 3 1   Download

In this study, 64 isolates of Streptomyces were screened for their antibacterial activity against Erwinia spp. The results indicated that 18 isolates showed an antagonistic reaction against Erwinia spp. Among them, isolate D5.1 showed the highest inhibition activity.

10p vibecca 01-10-2024 2 2   Download

FtsZ is conserved in almost all bacteria and is an essential protein for bacterial cell division. The cell division is prevented by the inhibitors against FtsZ’s functions. Thus, FtsZ is known as an attractive, and underexploited novel antibacterial target protein. The aim of this research is searching for new antibacterial agents from 72 plants collected in Central Vietnam.

6p vifaye 20-09-2024 3 1   Download

In this study, we systematically screened and assessed the antibacterial efficacy of five chitosan preparations of different viscosities and components. Additionally, we explored the synergistic antimicrobial potential of the most potent chitosan sample in combination with commonly employed antibiotics, including ampicillin, amoxicillin, oxacillin, and levofloxacin against four prevalent BM-causing pathogens: Staphylococcus epidermidis, Streptococcus agalactiae, Streptococcus uberis and Pseudomonas sp.

14p xuanphongdacy06 18-09-2024 3 1   Download

The diversity of medicinal plants in Vietnam is a rich source to develop novel health products. In this study, the antioxidant and antimicrobial activities of ethanolic extracts of Pluchea indica, Drynaria fortunei, Stephania glabra, lemongrass (Cymbopogon citratus) and lime (Citrus aurantifolia) mixture, and ginger (Zingiber officinale) and kumquat (Citrus japonica) mixture, were evaluated.

7p guitaracoustic02 08-12-2021 13 1   Download

The phytochemical analysis and antibacterial and antioxidant activity of Ardisia silvestris extracts were carried out. The bioactive compounds of Ardisia silvestris leaves were extracted with petroleum ether, ethyl acetate, ethanol and water by immersion and microwave method. The DPPH method was used to determine the antioxidant activity of Ardisia silvestris extracts.

8p larachdumlanat129 19-01-2021 21 5   Download

In this study, methanolic extracts from the stems, leaves and flowers of Ipomoea pes-caprae that were collected in Xuan Thuy National Park were evaluated for their antibacterial and antioxidative activities, and their ability to inhibit plant growth. The DPPH free radical scavenging activity of crude methanol extracts was evaluated.

7p tamynhan8 04-11-2020 20 2   Download

Characterization results show that N-doped TiO2 samples have a broader absorption spectrum and a higher antibacterial efficiency against E. coli than pure samples. The DFT calculation suggests that nitrogen ion doping induces the formation of new states closed to the valence band leading to a narrowing of the band gap and a great improvement in photocatalytic activity in the visible light region of the doped material.

8p tamynhan8 04-11-2020 8 1   Download

A new series of transition metal complexes of Co(III), Ni(II) and VO(IV) was synthesized with the bidentate Schiff base ligand (HL) derived from the condensation of 2-amino-3-benzyloxypyridine and 5-bromo salicylaldehyde.

14p tocectocec 25-05-2020 23 2   Download

A group of new fluoroaniline Schiff bases (3a–3f) were synthesized and structurally characterized by various spectroscopic techniques such as 1H-NMR, LC-MS and FT-IR spectral studies.

8p tocectocec 25-05-2020 14 1   Download

A series of novel 5-Bromo-3-iodo-1H-pyrazolo[3,4-b]pyridine linked various sulfonamide derivatives 8a-8j poly functionalized were designed and synthesized in moderate to good yield.

10p tocectocec 25-05-2020 14 1   Download

The objective of the present investigation was to isolate and identify the antimicrobial activity showing actinomycetes associated with sponges. Sponges such as Acanthella klethra, Theonella cylendrica, Helicona sp., Auletta sp., and Callyspongia sp. were collected at Sangumal, in Rameswaram island, Ramanathapuram District, Tamil Nadu, India. Isolates of 22 actinomycetes were isolated from sponges. Isolates No. 16 showed high antibacterial and antifungal activity and the isolate was identified as Streptomyces sp.

8p cothumenhmong5 17-05-2020 13 1   Download

A green and simple approach has been successfully developed to synthesize chitosan/Ag nanocomposites using kumquat extract as a biological reducing agent. It indicates to be an ecofriendly and green method for the synthesis providing a cost effective and an efficient route for the chitosan/Ag nanocomposites’ synthesis. The prepared chitosan/Ag nanocomposites have been characterized by UV-vis, TEM, FTIR, and XRD. Result showed those chitosan/Ag nanocomposites have been obtained with average particle size ~15-25 nm.

10p abcxyz123_02 03-03-2020 28 2   Download

The lupane triterpenoid lupeol is found in a variety of plants. Its biological activities have attracted a great deal of interests. A number of studies on the antiinflammatory, antimycobacterial, antimalarial and anticancer activities of this compound and its derivatives have been reported. Based on our knowledge, there have not been any reports on the antimicrobial activity of lupeol and its derivatives.

5p uocvong04 24-09-2015 64 3   Download

Croton tonkinensis Gagnep., commonly named in Vietnamese as "Kho sam Bac Bo", is a tropical shrub native to the Northern Vietnam. Its dried leaves (Folium Tonkinensis) have been used in Vietnamese traditional medicine to treat boils, abscesses, impetigo, abdominal pain, dyspepsia, dysentery, gastric and duodenal ulcers [1, 2]. The plant is of our interest since its varied biological activities demonstrated in our various in vitro bioassays including anti-inflammatory, anticancer, antiplasmodial, antibacterial and antifungal.

2p uocvong04 24-09-2015 56 3   Download

Ethanolic and aqueous (hot and cold) extracts of the fruit pulp, stem bark and leaves of Tamarindus indica were evaluated for antibacterial activity, in vitro, against 13 Gram negative and 5 Gram positive bacterial strains using agar well diffusion and macro broth dilution techniques, simultaneously.

12p tanbnhp 22-03-2014 46 5   Download

Members of the proline-rich antibacterial peptide family, pyrrhocoricin, apidaecin and drosocin appear to kill responsive bacterial species by binding to themultihelical lid region of the bacterial DnaK protein.Pyrrhocoricin, the most potent among these peptides, is nontoxic to healthy mice, andcanprotect these animals frombacterial challenge.

12p research12 23-04-2013 32 3   Download

Microcin J25 (MccJ25) is the single macrocyclic antimicro-bial peptidebelonging to the ribosomally synthesizedclass of microcins that are secreted byEnterobacteriaceae.Itshowed potent antibacterial activity against severalSalmonellaand Escherichiastrains and exhibited a compact three-dimen-sional structure [Blondet al. (2001) Eur. J. Biochem., 268, 2124–2133]. The molecular mechanisms involved in the biosynthesis, folding andmode of action of MccJ25 are still unknown.

11p tumor12 22-04-2013 44 2   Download

Peptides composed of leucyl and lysyl residues (
LK pep-tides) with different compositions and sequences were compared for their antibacterial activities usingcell wall-less bacteria of the classMollicutes(acholeplasmas, mycoplas-mas and spiroplasmas) as targets. The antibacterial activity of the amphipathica-helical peptides varied with their size, 15 residues beingthe optimal length, independent of the membrane hydrophobic core thickness and the amount of cholesterol.

11p fptmusic 16-04-2013 36 3   Download

Cationic antimicrobial peptides are naturally occurring antibiotics that are actively being explored as a new class of anti-infective agents. We recently identified three cathelicidin antimicrobial peptides from chicken, which have potent and broad-spectrum antibacterial activitiesin vitro (Xiao Y, Cai Y, Bommineni YR, Fernando SC, Prakash O, Gilliland SE & Zhang G (2006)J Biol Chem281, 2858–2867).

13p inspiron33 26-03-2013 50 4   Download