Biodegradation control of a polyamide 4–visible-light-sensitive TiO2 composite by a fluorescent light irradiation

In this study, we were able to impart a biodegradation control function, in which biodegradation is suppressed by fluorescent light irradiation and progressed in the dark, to PA4 by compositing visible-light-sensitive TiO2.
Source: Polymer Degradation and Stability - Category: Chemistry Source Type: research

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This study aimed to develop novel multifunctional soy protein-based packaging materials with the incorporation of cellulose nanofibril (CNF), Cedrus deodara pine needle extract (PNE), and lactic acid. The effects of the loaded components on the physical and functional properties of nanocomposites were evaluated. Results indicate that the incorporation of CNF into the composite enhanced its tensile strength due to the filling effects of CNF. The addition of CNF and PNE greatly enhanced the light barrier property of films. Moreover, the films containing PNE displayed strong antioxidant activity and significantly improved ant...
Source: Food Packaging and Shelf Life - Category: Food Science Source Type: research
Publication date: Available online 20 July 2019Source: Biocatalysis and Agricultural BiotechnologyAuthor(s): Ashwini Lydia Manoharan, Suman Thamburaj, Kasipandi Muniyandi, Gayathri Jagadeesan, Saikumar Sathyanarayanan, Gayathri Nataraj, Parimelazhagan ThangarajAbstractPlants are the natural honorarium used for primary health care and people rely upon herbal medications for the prevention and cure of numerous diseases that are caused by infectious pathogens. The extracts of Elaeocarpus tectorius fruits were successively prepared using five solvents (Petroleum ether, Dichloromethane, Ethyl acetate, Methanol and water) varyin...
Source: Biocatalysis and Agricultural Biotechnology - Category: Biotechnology Source Type: research
Wei-Zhong Liu Three new γ-hydroxyl butenolides (1–3), a pair of new enantiomeric spiro-butenolides (4a and 4b), a pair of enantiomeric cyclopentenones (5a new and 5b new natural), and six known compounds (6–11), were isolated from Aspergillus sclerotiorum. Their structures were established by spectroscopic data and electronic circular dichroism (ECD) spectra. Two pairs of enantiomers [(+)/(–)-6c and (+)/(–)-6d] obtained from the reaction of 6 with acetyl chloride (AcCl) confirmed that 6 was a mixture of two pairs of enantiomers. In addition, the X-ray data confirmed tha...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research
Molecules, Vol. 24, Pages 2629: Chitosan-Based Bioactive Hemostatic Agents with Antibacterial Properties—Synthesis and Characterization Molecules doi: 10.3390/molecules24142629 Authors: Julia Radwan-Pragłowska Marek Piątkowski Volodymyr Deineka Łukasz Janus Viktoriia Korniienko Evgenia Husak Viktoria Holubnycha Iryna Liubchak Vyacheslav Zhurba Aleksandra Sierakowska Maksym Pogorielov Dariusz Bogdał Massive blood loss is responsible for numerous causes of death. Hemorrhage may occur on the battlefield, at home or during surgery. Commercially available biomaterials may be insufficient ...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research
In this study, anti-bacterial polyamide thin film composite (PA-TFC) decorated with hydrophilic polyrhodanine (PRh) nanoparticles was fabricated through a novel route of direct filtration method. This method is a facile technique for modification of the membrane surface, in particular, for recovery of the membrane antibacterial agent which is lost during the process. The synthesized membranes were studied for morphology, surface functional groups, hydrophilicity, and surface roughness via FESEM, FTIR, contact angle, and AFM analysis. Both diffusion inhibition zone and colony formation unit tests exhibited excellent biocida...
Source: Chemical Engineering Research and Design - Category: Chemistry Source Type: research
Abstract Neutrophils are important mediators of the antimicrobial defense during urinary tract infections (UTIs). When activated at the site of infection, these innate immune cells phagocytose and neutralize an invading pathogen. Another neutrophil defense strategy is the release of effectors, such as antimicrobial peptides and proteins stored in neutrophil granules and reactive oxygen species. Their release can be facilitated by cellular signals that trigger chromatic decondensation and the disruption of nuclear membranes, followed by granule and plasma membrane disintegration, DNA release into the extracellular ...
Source: Mol Biol Cell - Category: Molecular Biology Authors: Tags: Methods Mol Biol Source Type: research
Publication date: November 2019Source: Materials Science and Engineering: C, Volume 104Author(s): Rania Dadi, Rabah Azouani, Mamadou Traore, Christine Mielcarek, Andrei KanaevAbstractThis is a report on the antibacterial activity of ZnO and CuO nanoparticles synthesized via sol-gel method. The studies were performed on Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli and Pseudomonas aeruginosa bacteria using disc and well diffusion methods, bioluminescence and optical density analysis. The results show a strong decline of bacterial strains after a short contact with nanoparticles. The modelling allowe...
Source: Materials Science and Engineering: C - Category: Materials Science Source Type: research
Publication date: Available online 17 July 2019Source: LWTAuthor(s): Jeong Hyeon Lee, Kyung Bin Song, Eun Ji Choi, Hong Kyeong Kim, Hae Woong Park, Ho Hyun ChunAbstractWe evaluated the efficiency of high hydrostatic pressure (HHP, 100–600 MPa) and 5% red ginseng concentrate (RGC) supplementation in inactivating foodborne pathogens and the impacts of treatment on the quality of kimchi sauce. Listeria monocytogenes and Staphylococcus aureus decreased by 4.02 log CFU/g with increasing HHP intensity, in kimchi sauces supplemented with or without RGC. In addition, Escherichia coli O157:H7 and Salmonella Typhimurium decr...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
We report a rapid method for synthesis of zeolitic imidazolate framework 8 (ZIF-8)-decorated graphene oxide (GO) composites (ZGO) with good antibacterial properties. The ZGO composites were synthesized at room temperature with low GO to metal salt ratios. The samples were characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, thermal gravimetric analysis, and surface area analysis. The characterization results show that ZIF-8 with a size of approximately 120 nm is successfully decorated on the surface of GO sheets with the host ZIF-8 framework maintained in the s...
Source: Particuology - Category: Science Source Type: research
In this study the effects against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Acinetobacterbaumannii, Streptococcus pyogenes, Proteus vulgaris, Salmonella typhi, Shigella spp., Candida albicans, Candida parapsilosis, Anopheles stephensi, Aedes aegypti, A. aegypti, A. albopictus, Culex pipiens, Trypanosoma brucei, Leishmania major, Trichomonas. Vaginalis, poliovirus type 1, coxsackie virus B, echovirus 6, West Nile Virus, herpes virus type 1, HSV-1 virus, Fusarium spp., Aspergillus flavus, Aspergillus niger, C. albicans, Alternaria alternata, Setosphaeria turcica and Magnaporthe grisea was revealed. ...
Source: Comparative immunology, microbiology and infectious diseases. - Category: Allergy & Immunology Authors: Tags: Comp Immunol Microbiol Infect Dis Source Type: research
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