Facile synthesized novel hybrid graphene oxide/cobalt ferrite magnetic nanoparticles based surface coating material inhibit bacterial secretion pathway for antibacterial effect

Publication date: November 2019Source: Materials Science and Engineering: C, Volume 104Author(s): T. Arun, Suresh K. Verma, Pritam Kumar Panda, R. Justin Joseyphus, Ealisha Jha, Ali Akbari-Fakhrabadi, Pranesh Sengupta, D.K. Ray, V.S. Benitha, K. Jeyasubramanyan, P.V. SatyamAbstractNanomaterial based paints are in current demand in the area of surface protective coatings due to the significant advances made to improve their antibacterial and anticorrosion characteristics. In this work, we have developed magnetic graphene oxide (MGO) paint with the incorporation of cobalt ferrite (CF) and graphene oxide (GO) along with paint materials by using high energy ball milling (HEBM). Morphological, elemental and functional analysis of the MGO paint is studied with ESEM, AFM, Raman, FTIR spectroscopy. EDS and PIXE methods are used for elemental analysis. Thermal analysis shows that the MGO film was stable up to 100 °C. The saturation magnetization of CF MNP is observed as 76 emu/g and it is reduced to 12 emu/g for MGP paint. The detailed antibacterial study of the prepared MGO paint has performed with S. typhimurium and E. coli. The dead-live assessment shows the dead population for S. typhimurium is superior up to 82% whereas it is 20% for E. coli. The morphological damage of bacterial cells is studied using SEM technique. Flow cytometry analysis of reactive oxygen species (ROS) generation experiments and computational analysis supported the proposed mechanism of induced ROS ...
Source: Materials Science and Engineering: C - Category: Materials Science Source Type: research

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This study demonstrated that HBCS could in turn lock moisture, can promote immunocompetence activity, can inhibit fibrosarcoma cell migration, and exhibits anti-bacterial functionality. Taken together, these results indicate that HBCS shows substantial promise for applications in cosmetics, biomedicine, and antibacterial therapies.
Source: Materials Science and Engineering: C - Category: Materials Science Source Type: research
Publication date: Available online 22 August 2019Source: LWTAuthor(s): Shunmugavel Uma Maheshwari, Sundarajan Amutha, Rangasamy Anandham, Ganapathyswamy Hemalatha, Natesan Senthil, Soon Woo Kwon, Natesan SivakumarAbstract:Panchamirtham is a fermented fruit mix made from natural fermentation of fruits (banana, brown sugar, seedless dates, sugar candy, honey, cardamom and ghee), which offers multiple health benefits to human. Research on fermented foods for probiotic microorganisms remains scarce compared to other dairy products. Hence, this present study was aimed to characterise the cultivable bacteria associated with panc...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
Publication date: December 2019Source: Food Packaging and Shelf Life, Volume 22Author(s): Sofía Collazo-Bigliardi, Rodrigo Ortega-Toro, Amparo ChiraltAbstractHydrothermal (60 min, 180 °C) extracts and cellulose fibres from coffee and rice husks were obtained to be incorporated into corn starch films, in order to improve the film functional properties as food packaging material and confer them active properties. Extracts exhibited antioxidant properties (EC50: 5.37–5.29 mg extract solids/mg DPPH) and antibacterial activity against Listeria innocua and Escheriquia coli (MIC values: 35&nd...
Source: Food Packaging and Shelf Life - Category: Food Science Source Type: research
This study showed that the two ClO2 generation methods are suitable and effective for decontamination of produce. The correlation between the cumulative ppm-h and pathogen reduction was independent of the quantity of products and other factors that may affect the consumption rate of ClO2. Therefore, the treatment parameters obtained from this study can be used for decontamination applications of similar scale or as references for evaluating using ClO2 gas for decontamination of tomatoes, blueberries, and baby-cut carrots in commercial-scale trials.
Source: Food Control - Category: Food Science Source Type: research
In conclusion, using a simple, fast, and inexpensive detection method, such as LAMP, especially in endemic regions or in an outbreak to control spreading of pathogens, is very important for public health.
Source: Journal of Microbiological Methods - Category: Microbiology Source Type: research
Publication date: 10 October 2019Source: Journal of Biotechnology, Volume 304Author(s): Melissa Horvat, Giuseppe Fiume, Susanne Fritsche, Margit WinklerAbstractA novel type III fungal CAR was identified from the organism Thermothelomyces thermophila. High expression levels were observed in E. coli using the pETDuet-1 plasmid system in combination with an autoinduction protocol. A broad substrate scope ranging from aromatic to aliphatic carboxylic acids was tested and TtCAR showed activity for all substrates. High specific activities for aromatic substrates and short chain aliphatic substrates were observed, comparable to t...
Source: Journal of Biotechnology - Category: Biotechnology Source Type: research
In this study, MR-1 immobilized on an electrode electrocatalyzes the oxidation of [Fe(CN)6]4- to [Fe(CN)6]3- efficiently and selectively. The selectivity depends on midpoint potential and overall charge(s) of redox molecules. Among 12 investigated redox molecules, the negatively charged molecules with high midpoint potentials, i.e., [Ru(CN)6]4- and [Fe(CN)6]4-, show strong electrocatalysis. Neither reference bacteria (Escherichia coli K-12 nor Streptococcus mutans) electrocatalyze the oxidation of [Fe(CN)6]4-. The electrocatalysis decays when MR-1 is covered with palladium nanoparticles presumptively involved with cytochro...
Source: Biosensors and Bioelectronics - Category: Biotechnology Source Type: research
Publication date: Available online 21 August 2019Source: Biocatalysis and Agricultural BiotechnologyAuthor(s): M. Harshiny, S. AiswaryaDevi, M. MatheswaranAbstractIn the recent period, nanomaterial with enhanced multifunctional activity and less mammalian toxicity were greatly required. With this perception, the stability, cytotoxicity and antimicrobial, photocatalytic traits of Amaranthus spinosus leaf extract (B-FeO NPs) and sodium borohydride (C-FeO NPs) abridged iron oxide nanoparticles were studied. The analysis results confirmed that B-FeO NPs have better physicochemical characters than C-FeO NPs. The NPs cytotoxicit...
Source: Biocatalysis and Agricultural Biotechnology - Category: Biotechnology Source Type: research
In this study, activated carbon felt (C3P1AC1) fabricated by combining coconut-shell activated carbon powder (CSAC), carbon fiber, and cellulose fiber was used as the anode electrode in an Escherichia coli (E. coli) biofilm-inoculated MFC. CSAC ratio in the C3P1AC1 anodes was varied from 0 to 75 wt%, called C3P1AC1-X (X = 0, 10, 20, 40, 60, and 75), to investigate the effectiveness of CSAC on the performance of the anode. The C3P1AC1 anodes were characterized by XRD, SEM, EDS, and sheet resistance measurement. The maximum power density of the MFC has increased 7.2-fold from 0.53μWcm-2 when using the...
Source: Biochemical Engineering Journal - Category: Biochemistry Source Type: research
Publication date: Available online 20 August 2019Source: Materials Today CommunicationsAuthor(s): Zerihun Beyene, Rupita GhoshAbstractBacterial infections and biofilm formations are the main problems associated with implants. Hence, the aims of this study are to develop nanocomposite biomaterials having different ratios of hydroxyapatite nanoparticles (nHAP) with green and chemically synthesized zinc oxide (ZnO) nanoparticle (NP) and examine its antimicrobial and antibiofilm activity. The synthesized nanoparticles were characterized for phase and microstructural analysis. The nanocomposite at 90:10, 75:25 and 60:40 ratio o...
Source: Materials Today Communications - Category: Materials Science Source Type: research
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