Molecules, Vol. 24, Pages 3355: Chemical Composition, In Vitro Antioxidant Potential, and Antimicrobial Activities of Essential Oils and Hydrosols from Native American Muscadine Grapes

This study demonstrated the variations in aromatic compounds accumulated in flowers and mature berry skins of muscadine grapes, and evaluated their possible antioxidant and antimicrobial activities. The presented results will be the base for future research, focused on a better understanding of the molecular and regulatory mechanisms involved in aromatic compound biosynthesis and accumulation in muscadine grapes.
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research

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Publication date: Available online 13 October 2019Source: MycoscienceAuthor(s): Katesaraporn Nuankeaw, Boonyanoot Chaiyosang, Thanapat Suebrasri, Somdej Kanokmedhakul, Saisaamorn Lumyong, Sophon BoonlueAbstractBioactive compounds of endophytic fungus Trichoderma polyalthiae were extracted from culture broth media. The crude extracts showed strong antimicrobial activity against human pathogens. Biologically active compounds were isolated and purified by chromatographic methods. The structures of the pure compounds were elucidated by spectroscopic methods. They were identified as Violaceol I and Violaceol II. These compounds...
Source: Mycoscience - Category: Biology Source Type: research
CONCLUSIONS: Incorporation of chitosan hydrogel into honey can substantially enhance its antimicrobial and wound healing effects. Chitosan-hydrogel/honey (1:3) is an optimal wound dressing formulation with ample antimicrobial and healing properties. PMID: 31298661 [PubMed - as supplied by publisher]
Source: Wounds - Category: General Medicine Tags: Wounds Source Type: research
In this study, a transposon mutagenesis approach was applied to reveal the factors involved in resistance to oxidative stress, and the biofilm formation among mutants and WT strains were further detected using crystal violet staining (CVS), scanning electron microscopy (SEM), and confocal laser scanning microscopy (CLSM) to reveal potential relationship between oxidative stress and biofilm formation. Materials and Methods The Development of Mutants Library The procedure of transposon mutagenesis approach was performed as described by Zhang et al. (2018). Screening of Mutants Tolerance to Oxidative Stress For screening...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
We report the synthesis and characterization of some organotin(IV) compounds of N-butyl-N-phenyldithiocarbamate complexes represented as [C4H9SnL2] (1), (CH3)2SnL2] (2), (C4H9)2SnL2] (3), (C6H5)2SnL2] (4)], where L is N-butyl-N-phenyldithiocarbamate. Single crystal X-ray analysis of compounds 2 and 3 showed that they possess five or six coordinate geometry. These compounds were evaluated for their antimicrobial properties against Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa, Bacillus cereus, Staphylococcus aureus, Candida albicans and Aspergillus flavus, and in-vitro cytotoxic activities against human cer...
Source: Journal of Molecular Structure - Category: Molecular Biology Source Type: research
Conclusion Starter cultures are an important tool that contributes to ensure the safety of fermented meat products. Indeed, the microorganisms that constitute starter cultures may inhibit or reduce the growth of spoilage and/or pathogenic populations through mechanisms, such as production of certain metabolites or competitive exclusion. Thus, the use of starter cultures may reduce the need for chemical additives, such as nitrites and nitrates. Furthermore, the lower residual levels of nitrates and nitrites detected in fermented meat products inoculated with starter cultures are due to the ability of starters to metabolize...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Publication date: Available online 17 April 2019Source: Microbial PathogenesisAuthor(s): Fatima Nehal, Mouna Sahnoun, Slim Smaoui, Bassem Jaouadi, Samir Bejar, Sbaihia MohammedAbstractA new exopolysaccharide (EPS) was produced by the Lactococcus lactis F-mou strain (LT898177.1) isolated from the Sahrawi camel milk in the Bir-Naam region, Algeria. The most influential production parameters were screened by the Plackett-Burman design for enhancing EPS yield utilizing the Mech-Degla juice as a low-cost raw material. An optimum condition of a 0.49 of inoculum size, a 100 rpm of agitation rate, and a 12 h of incubation peri...
Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
Conclusion In conclusion, aqueous extracts of C. ferruginea leaves showed antimicrobial activity due to the presence of hydroquinone and caffeic acid methyl ester. This supports its traditional use for infections and confirmed that the active molecules are water-soluble. Author Contributions KK, SP, LVP, and WL conceived and designed the experiments. SP, KK, M-RY, and J-GL performed the experiments. SP, LVP, WL, M-RY, J-GL, and Z-HJ analyzed the data. WL and Z-HJ contributed reagents, materials, and analysis tools. KK, SP, WL, M-RY, Z-HJ, and LVP contributed to the writing of the manuscript. All authors contributed to m...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Abstract Analysis of an antimicrobial culture broth extract of the sponge-derived actinomycete Streptomyces sp. (strain G246) led to the isolation of two new lavandulylated flavonoids, 6-lavandulyl-7-methoxy-5,2',4'-trihydroxylflavanone (1) and 5'-lavandulyl-4'-methoxy-2,4,2',6'-tetrahydroxylchalcone (2), along with eight known compounds 3-10. Their structures were established by spectral data analysis, including MS, 1D, 2D-NMR and CD. The absolute configurations of 1 and 2 were suggested by comparison of their experimental and calculated electronic circular dichroism spectra. All the isolated compounds were evalu...
Source: Natural Product Research - Category: Biochemistry Authors: Tags: Nat Prod Res Source Type: research
Publication date: Available online 7 December 2018Source: Biotechnology ReportsAuthor(s): Ezhumalai Parthiban, Nandhagopal Manivannan, Ravichandran Ramanibai, Narayanasamy MathivananAbstractSilver nanoparticles play a important role in controlling mosquito population as well as multi drug resistant pathogens without causing much harm to humans. In the present study was focused on green synthesis of silver nanoparticles against dengue causing vector (Aedes aegypti) and pathogens affecting humans. The synthesized silver nanoparticle was confirmed using UV- absorption spectrum range obtained at 416 nm, XRD, FTIR and HR...
Source: Biotechnology Reports - Category: Biotechnology Source Type: research
athasivam Antibiotic resistance is one of the most important global problems currently confronting the world. Different biomedical applications of silver nanoparticles (AgNPs) have indicated them to be promising antimicrobial agents. In the present study, extracellular extract of an endophytic bacterium, Pantoea ananatis, was used for synthesis of AgNPs. The synthesized AgNPs were characterized by UV–Vis spectroscopy, FTIR, transmission electron microscopy (TEM), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), and Zeta potential. The antimicrobial potential of the AgNPs against pa...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research
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