scholarly journals Homogeneous Coatings of Titanium Dioxide Nanoparticles on Corona-Treated Cotton Fabric for Enhanced Self-Cleaning and Antibacterial Properties

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Mojtaba Aalipourmohammadi ◽  
Abolfazl Davodiroknabadi ◽  
Ali Nazari
Keyword(s):  
Titanium Dioxide ◽  
Pathogenic Bacteria ◽  
Titanium Dioxide Nanoparticles ◽  
Antibacterial Properties ◽  
Antibacterial Activities ◽  
Sunlight Irradiation ◽  
Self Cleaning ◽  
Mapping Techniques ◽  
Cellulosic Fabric ◽  
And Staphylococcus Aureus

Abstract This study discusses the effect of corona pretreatment and subsequent loading of titanium dioxide nanoparticles on self-cleaning and antibacterial properties of cellulosic fabric. The corona-pretreated cellulosic fabrics were characterized by field emission scanning electron microscopy, and X-ray mapping techniques revealed that layers of the titania deposited on cellulose fibers were more uniform than the sample without pre-corona treatment. The self-cleaning property of treated fabrics was evaluated through discoloring dye stain under sunlight irradiation. The antibacterial activities of the samples against two common pathogenic bacteria including Escherichia coli and Staphylococcus aureus were also assessed. The results indicated that self-cleaning and antibacterial properties of the corona-pretreated fabrics were superior compared to the sample treated with TiO2 alone. Moreover, using corona pretreatment leads to samples with good washing fastness.

scholarly journals Antimicrobial Efficacy and Spectrum of Phosphorous-Fluorine Co-Doped TiO2 Nanoparticles on the Foodborne Pathogenic Bacteria Campylobacter jejuni, Salmonella Typhimurium, Enterohaemorrhagic E. coli, Yersinia enterocolitica, Shewanella putrefaciens, Listeria monocytogenes and Staphylococcus aureus

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1786
Author(s):  
György Schneider ◽  
Bettina Schweitzer ◽  
Anita Steinbach ◽  
Botond Zsombor Pertics ◽  
Alysia Cox ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Campylobacter Jejuni ◽  
Food Industry ◽  
Pathogenic Bacteria ◽  
Antibacterial Activities ◽  
Tio2 Nps ◽  
E Coli ◽  
Foodborne Pathogenic Bacteria ◽  
And Staphylococcus Aureus ◽  
Co Doped

Contamination of meats and meat products with foodborne pathogenic bacteria raises serious safety issues in the food industry. The antibacterial activities of phosphorous-fluorine co-doped TiO2 nanoparticles (PF-TiO2) were investigated against seven foodborne pathogenic bacteria: Campylobacter jejuni, Salmonella Typhimurium, Enterohaemorrhagic E. coli, Yersinia enterocolitica, Shewanella putrefaciens, Listeria monocytogenes and Staphylococcus aureus. PF-TiO2 NPs were synthesized hydrothermally at 250 °C for 1, 3, 6 or 12 h, and then tested at three different concentrations (500 μg/mL, 100 μg/mL, 20 μg/mL) for the inactivation of foodborne bacteria under UVA irradiation, daylight exposure or dark conditions. The antibacterial efficacies were compared after 30 min of exposure to light. Distinct differences in the antibacterial activities of the PF-TiO2 NPs, and the susceptibilities of tested foodborne pathogenic bacterium species were found. PF-TiO2/3 h and PF-TiO2/6 h showed the highest antibacterial activity by decreasing the living bacterial cell number from ~106 by ~5 log (L. monocytogenes), ~4 log (EHEC), ~3 log (Y. enterolcolitca, S. putrefaciens) and ~2.5 log (S. aureus), along with complete eradication of C. jejuni and S. Typhimurium. Efficacy of PF-TiO2/1 h and PF-TiO2/12 h NPs was lower, typically causing a ~2–4 log decrease in colony forming units depending on the tested bacterium while the effect of PF-TiO2/0 h was comparable to P25 TiO2, a commercial TiO2 with high photocatalytic activity. Our results show that PF-co-doping of TiO2 NPs enhanced the antibacterial action against foodborne pathogenic bacteria and are potential candidates for use in the food industry as active surface components, potentially contributing to the production of meats that are safe for consumption.

Impacts of titanium dioxide nanoparticles on transformation of silver nanoparticles in aquatic environments

2018 ◽  
Vol 5 (5) ◽  
pp. 1191-1199 ◽  
Author(s):  
Yinqing Zhang ◽  
Liwen Qiang ◽  
Yuting Yuan ◽  
Wei Wu ◽  
Binbin Sun ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Aquatic Environments ◽  
Oxidative Dissolution ◽  
Sunlight Irradiation

Under sunlight irradiation, titanium dioxide nanoparticles could promote the oxidative dissolution of silver nanoparticles in aquatic environments.

scholarly journals Antibacterial Effects of Oak Fruit, Jaft, and Jaftex Herbal Mouthwash: A Review

2019 ◽  
Author(s):  
Maria Cheraghi ◽  
Fatemeh Babadi
Keyword(s):  
Antimicrobial Activity ◽  
Pathogenic Bacteria ◽  
Web Of Science ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Antibiotic Sensitivity ◽  
Antibacterial Activities ◽  
Antibacterial Effects ◽  
Digital Literature ◽  
Review Study

Abstract Recently, natural products have been evaluated as a source of antimicrobial agent with efficacies against a variety of microorganisms. The antibacterial activities of the oak fruit,inner husk of oak fruit (Jaft), and Jaftex mouthwash have been studiedin several studies. Thisstudy aimedto review the studies ofthe effects of antibacterial properties of the oak fruit, oak fruit hull (Jaft), and Jaftex mouthwash. Materials and Methods In this review study, relevant articles related to the antimicrobial activity of the oak fruit, inner husk of oak fruit (Jaft), and 'Jaftex mouthwash' were searched from the current digital literature using electronic databases namely, SID, ScienceDirect, PubMed, Google Scholar, Magiran, Web of Science employing the same keywords from 1990 to 2019. Results Oakfruit, inner husk of oak fruit (Jaft), and Jaftex mouthwash have antimicrobial properties against many microorganisms. Discussion and Conclusion Antibacterial properties of oak fruit, inner husk ofoak fruit (Jaft) can be used to reverse the antibiotic sensitivity against pathogenic bacteria. Jaftex is recommended as an antibacterial and anti-plaque mouthwash.

scholarly journals Biosynthesis and Characterization of Titanium Dioxide Nanoparticles Using Pithecellobium Dulce and Lagenaria Siceraria Aqueous Leaf Extract and Screening their Free Radical Scavenging and Antibacterial Properties

2015 ◽  
Vol 50 ◽  
pp. 80-95 ◽  
Author(s):  
S. Kalyanasundaram ◽  
M. Jeevan Prakash
Keyword(s):  
Titanium Dioxide ◽  
New Technologies ◽  
Titanium Dioxide Nanoparticles ◽  
Radical Scavenging ◽  
Antibacterial Properties ◽  
Biological Method ◽  
Lagenaria Siceraria ◽  
Biological Behaviour ◽  
Synthesis Of Nanoparticles ◽  
Xrd Techniques

The recent development and implementation of new technologies have led to new era, the nanorevolution which unfolds role of plants in bio and green synthesis of nanoparticles which seem to have drawn quite an unequivocal attention with a view of synthesizing stable nanoparticles. In this present work, we have compared titanium dioxide nanocrystals synthesized by both chemical method and biological method from Titanium tetra isopropoxide as precursor. The biological method was performed by using the aqueous plant extract of Pithecellobium dulce and Lagenaria siceraria. The synthesized nanocrystals were characterized by FTIR Spectroscopy, Scanning Electron Microscopy (SEM), Energy Dispersive Xray (EDAX), Transmission Electron Microscope (TEM) and X-ray diffraction (XRD) techniques and also Antioxidant assay and antimicrobial test were performed to evaluate its biological behaviour. The nanocrystals synthesized by biological method were found to have higher antioxidant potential, antimicrobial activity than chemically synthesized.

scholarly journals Chemical composition and antibacterial activities of the essential oils from Ocotea zahamenensis Van Der Werff (Lauraceae)

2021 ◽  
Vol 16 (1) ◽  
pp. 115-125
Author(s):  
Razafiarimanga Zara Nomentsoa ◽  
Randriamampianina Lovarintsoa Judicael ◽  
Randrianarivo Hanitra Ranjàna ◽  
Ralitera Andrianirina Manampisoa ◽  
Rakoto Danielle Aurore Doll ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Body Weight ◽  
Essential Oils ◽  
Pathogenic Bacteria ◽  
Vibrio Fischeri ◽  
Antibacterial Properties ◽  
Antibacterial Activities ◽  
Plant Parts ◽  
Detection Analysis ◽  
Toxicological Studies

The present work aimed to study the composition and antibacterial properties of the essential oils (EO) of Ocotea zahamenensis leaves (LEO), stem (SEO) and root (REO) barks from two harvest periods (March and June). All EOs were extracted by hydrodistillation from fresh plant parts with yields up to 4.5%. They are colourless, clear, with a strong odour, heavy, levogyre, with a low acid index and an ester index up to 14.89. Gas chromatography/flame ionisation detection analysis of these EOs identified 5 to 12 components representing 96.06 to 99.96% of the overall composition. Safrole was by far the most predominant constituent with contents ranging from 77.45% (SEO, June) to 97.05% (REO, March). The antibacterial activity was tested against eight pathogenic bacteria including 4 Gram (-) and 4 Gram (+) using microdilution assays. With Minimum Inhibitory Concentration (MIC) values of less than 1 mg/mL, all EOs showed antibacterial activity which varied according to the strain. There was not much difference between the activities of March and June Eos, and in both cases SEO were slightly more effective than LEO and REO. All EOs had bacteriostatic action on Bacillus cereus and Vibrio fischeri and bactericidal on almost other strains. When administered orally to mice at 0.5 mg/kg body weight, all EOs caused symptoms of intoxication. Their LD50 varied from 1.019 to 2.73 g/kg body weight. These EOs could be a new source of safrole and could be used for various purposes with further toxicological studies.

scholarly journals Influence of titanium dioxide modification on the antibacterial properties

2016 ◽  
Vol 18 (4) ◽  
pp. 56-64 ◽  
Author(s):  
Paulina Rokicka ◽  
Agata Markowska-Szczupak ◽  
Łukasz Kowalczyk ◽  
Ewa Kowalska ◽  
Antoni W. Morawski
Keyword(s):  
Escherichia Coli ◽  
Titanium Dioxide ◽  
Uv Irradiation ◽  
Antibacterial Properties ◽  
Sunlight Irradiation ◽  
Dark Incubation ◽  
Disinfection Process ◽  
Chemical Factory ◽  
Dark Conditions ◽  
Group Chemical

Abstract Antibacterial properties of 15 titania photocatalysts, mono- and dual-modified with nitrogen and carbon were examined. Amorphous TiO2, supplied by Azoty Group Chemical Factory Police S.A., was used as titania source (Ar-TiO2, C-TiO2, N-TiO2 and N,C-TiO2 calcined at 300°C, 400°C, 500°C, 600°C, 700°C). The disinfection ability was examined against Escherichia coli K12 under irradiation with UV and artificial sunlight and in dark conditions. It has been found the development of new photocatalysts with enhanced interaction ability with microorganisms might be a useful strategy to improve disinfection method conducted under artificial sunlight irradiation. The efficiency of disinfection process conducted under artificial sunlight irradiation with carbon (C-TiO2) and carbon/nitrogen (N,C-TiO2) photocatalysts was similar as obtained under UV irradiation. Furthermore, during dark incubation, any toxicity of the photocatalyst was noted.

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