Chemical composition, antibacterial activity and related mechanism of valonia and shell from Quercus variabilis Blume (Fagaceae) against Salmonella paratyphi a and Staphylococcus aureus

Plant secondary metabolites and phytochemicals that exhibit strong bioactivities have potential to be developed as safe and efficient natural antimicrobials against food contamination and addressing antimicrob...
Source: BMC Complementary and Alternative Medicine - Category: Complementary Medicine Authors: Tags: Research article Source Type: research

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Publication date: March 2020Source: Materials Science and Engineering: C, Volume 108Author(s): Nehal Salahuddin, Mohamed Abdelwahab, Mohamed Gaber, Sahar ElneanaeyAbstractBiodegradable, biocompatible and non-toxic polymer-based nanoparticles are the novel nanotherapeutic tool which is used for adsorption and encapsulation drugs. Extended release formulation of Norfloxacin antibiotic, chemotherapeutic agent model, drug in the form of encapsulated and loaded poly (lactic acid) nanocomposites-based Titanium dioxide (PLA/TiO2) was developed. Nanocomposites were prepared using different contents (1, 3, 5 wt %) and morphologie...
Source: Materials Science and Engineering: C - Category: Materials Science Source Type: research
Publication date: Available online 14 November 2019Source: Carbohydrate PolymersAuthor(s): Ruzanna Ahmad Shapi’i, Siti Hajar Othman, Norhazirah Nordin, Roseliza Kadir Basha, Mohd Nazli NaimAbstractChitosan nanoparticles (CNP) were synthesized via ionic gelation and used for the preparation of starch-based nanocomposite films containing different concentration of CNP (0, 5, 10, 15, 20% w/w). Antimicrobial properties of starch/CNP films was evaluated via in vitro (disc diffusion analysis) and in vivo (microbial count in wrapped cherry tomatoes) study. It was found that inhibitory zone of the 15 and 20% of starch/CNP fi...
Source: Carbohydrate Polymers - Category: Biomedical Science Source Type: research
ConclusionEthyl acetate &Water extracts have represented potent activity against Salmonella typhi, Escherichia coli, &Staphylococcus aureus bacteria as well, provided cytotoxicity against tested cancer cell lines. These results can be explored to identify individual phyto-molecules from the extracts for anticancer &antimicrobial potentials to identify new phytomedicines.
Source: European Journal of Integrative Medicine - Category: Complementary Medicine Source Type: research
Abstract The present study focused on production, optimization and characterization of exopolysaccharide (EPS) from Weissella confusa MD1. The purified EPS MD1 was also evaluated for in vitro biological activities. The maximum yield of EPS (10.07 ± 0.32 g/L) was obtained with optimized culture conditions of 35 ˚C at pH 6.5 for 36 h with 4% (w/v) galactose and 1% (w/v) ammonium nitrate supplemented in MRS broth. The crude EPS was purified with diethylamino ethanol-Sepharose Fast Flow column and Sephadex-G 75 column. The physicochemical and functional characterization of the EPS was done by high-performance ...
Source: International Journal of Biological Macromolecules - Category: Biochemistry Authors: Tags: Int J Biol Macromol Source Type: research
Publication date: 2019Source: Materials Today: Proceedings, Volume 19, Part 1Author(s): Α. Ntolia, N. Matisioudis, E. Triantafillou, G. Evangelopoulou, V. Karachristou, E. Rizos, T. Karamanidou, A. Tsouknidas, D. Papadopoulos, D. Tsipas, N. Michailidis, A. AggeliAbstractSilver nanoparticles (AgNPs) constitute a promising approach for the development of new antimicrobial systems. The major global concern about the emergence of bacterial strains resistant to widely used therapeutic agents for human infections has increased research for the discovery of new antimicrobial compounds as therapeutic alternatives. The aim of...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
Publication date: Available online 31 October 2019Source: Food ControlAuthor(s): Brisha Arulrajah, Belal J. Muhialdin, Mohammad Zarei, Hanan Hasan, Nazamid SaariAbstractKenaf seeds are a promising source of natural preservatives for food applications due to their potential as a substrate to generate peptides with high antibacterial activity. We sought to generate bioactive peptides with antibacterial activity from Kenaf seed proteins via lacto-fermentation. The ground seeds were defatted and protein extracted using acid precipitation. Kenaf seed protein was fermented with Lactobacillus casei for 72 h at 37 °C, and the ...
Source: Food Control - Category: Food Science Source Type: research
Publication date: December 2019Source: Food Packaging and Shelf Life, Volume 22Author(s): Esen Alp-Erbay, Kelly J. Figueroa-Lopez, José M. Lagaron, Emre Çağlak, Sergio Torres-GinerAbstractThis research study originally reports the preparation and characterization of electrospun films based on poly(ε-caprolactone) (PCL) with high histamine-binding capacity. To this end, submicron PCL fibers filled with nanostructured zeolite or silica (SiO2) microparticles in the 5–20 wt% range were first prepared by solution electrospinning. The resultant electrospun composite fiber mats were thereafter therm...
Source: Food Packaging and Shelf Life - Category: Food Science Source Type: research
Publication date: Available online 31 October 2019Source: Food BioscienceAuthor(s): Esmeray Kuley, Mebrure Nüket Yavuzer, Emre Yavuzer, Mustafa Durmuş, Hatice Yazgan, Yekta Gezginç, Fatih ÖzogulAbstractThe impact of safflower (Carthamus tinctorius) and bitter melon (Momordica charantia L.) extracts on growth of fish spoilage bacteria (Acinetobacter lwoffii, Pseudomonas oryzihabitans, Enterobacter cloacae, Shigella spp., Morganella psychrotolerans, Photobacterium phosphoreum) and food-borne pathogens (Staphylococcus aureus, Klebsiella pneumoniae, Enterococcus faecalis, Salmonella Paratyphi A) and their bio...
Source: Food Bioscience - Category: Food Science Source Type: research
In conclusion, SCLP was a potential natural antimicrobial substance with strong antimicrobial activity, which may reduce the use of antibiotics or combat drug-resistant bacteria through synergistic combination with antibiotics. PMID: 31637496 [PubMed - as supplied by publisher]
Source: Applied Microbiology and Biotechnology - Category: Microbiology Authors: Tags: Appl Microbiol Biotechnol Source Type: research
Abstract Community-acquired bloodstream infections (CA-BSI) are major causes of severe febrile illness and death worldwide. In light of new data and the growing problem of antimicrobial resistance (AMR) among pathogens causing BSI, we undertook a systematic review of hospital-based studies of CA-BSI among patients hospitalized with fever. Without restriction to language or country, we searched PubMed, Web of Science, and Scopus for prospective hospital-based studies of community-acquired, culture-confirmed BSI among febrile inpatients. We determined by study the prevalence of BSI among participants, pathogens resp...
Source: Antimicrobial Agents and Chemotherapy - Category: Microbiology Authors: Tags: Antimicrob Agents Chemother Source Type: research
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