Antibacterial properties of electrospun Ti3C2Tz(MXene)/chitosan nanofibers

Silver nanoparticles (Ag0) have attracted the most attention due to their broad antimicrobial application and outstanding activity. The silver nanoparticles are usually in colloidal form, then immobilization the colloid onto solid support is still interesting to explore. In this work, a new method for silver colloidal nanoparticle immobilization on silica gel beads (SiG), which was then symbolized as Ag0-[chi-SiG] was conducted and characterized successfully. The finding proved that SiG must be coated with three chitosan film layers to give stable support for silver nanoparticles. This coating method caused the chitosan completely covered SiG, and the chitosan film provides coordination bonding for silver ions. The most appropriate solvent for silver ion impregnation on the surface of chi-SiG is methanol compared to other solvents. Tungsten lamp as the photo-irradiation, which is low cost and environmentally friendly has been proven effective for silver ion reduction, as shown by silver metal colloid UV-Vis surface plasmon resonance at 400-700 nm. Ag0-[chi-SiG] showed the antibacterial properties of inhibiting the growth Staphylococcus aureus and Escherichia coli; then it provides the potential application for antibacterial filter material. According to the weight comparison between antibacterial standard and Ag content, then Ag0-[chi-SiG] has two and five times higher of exhibiting zone for each bacteria.

Download Full-text

Evaluating the Antimicrobial Activity of Commercially Available Herbal Toothpastes on Microorganisms Associated with Diabetes Mellitus

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1427 ◽

2013 ◽

Vol 14 (5) ◽

pp. 924-929 ◽

Cited By ~ 4

Author(s):

Reena Kulshrestha ◽

J Kranthi ◽

P Krishna Rao ◽

Feroz Jenner ◽

V Abdul Jaleel ◽

...

Keyword(s):

Diabetes Mellitus ◽

Antimicrobial Activity ◽

Dental Health ◽

Antibacterial Properties ◽

Antimicrobial Properties ◽

Test Organism ◽

Diffusion Method ◽

Zone Of Inhibition ◽

Disk Diffusion Method

ABSTRACT Aim The present study was conducted to evaluate the efficacy of commercially available herbal toothpastes against the different periodontopathogens. Materials and methods Six herbal toothpastes that were commonly commercially available were included in the study. Colgate herbal, Babool, Meswak, Neem active, Dabur red toothpastes were tested for the study whereas sterile normal saline was used as control. Antimicrobial efficacies of dentifrices were evaluated against Streptococcus mutans and Actinobacillus actinomycetemcomitans. The antimicrobial properties of dentifrices were tested by measuring the maximum zone of inhibition at 24 hours on the Mueller Hinton Agar media inoculated with microbial strain using disk diffusion method. Each dentifrice was tested at 100% concentration (full strength). Results The study showed that all dentifrices selected for the study were effective against the entire test organism but to varying degree. Neem active tooth paste gave a reading of 25.4 mm as the zone of inhibition which was highest amongst all of the test dentifrices. Colgate Herbal and Meswak dentifrices recorded a larger maximum zone of inhibition, measuring 23 and 22.6 mm respectively, compared to other toothpastes. All other dentifrices showed the zone of inhibition to be between 17 and 19 mm respectively. Conclusion The antibacterial properties of six dentifrices were studied in vitro and concluded that almost all of the dentifrices available commercially had antibacterial properties to some extent to benefit dental health or antiplaque action. How to cite this article Jenner F, Jaleel VA, Kulshrestha R, Maheswar G, Rao PK, Kranthi J. Evaluating the Antimicrobial Activity of Commercially Available Herbal Toothpastes on Microorganisms Associated with Diabetes Mellitus. J Contemp Dent Pract 2013;14(5):924-929.

Download Full-text

Antimicrobial Packaging

International Journal of Research in Business and Social Science (2147-4478) ◽

10.20525/ijrbs.v10i4.1251 ◽

2021 ◽

Vol 10 (4) ◽

pp. 479-484

Author(s):

Diana Merchan ◽

Mercy Agila ◽

Marina Arteaga ◽

Monica Criollo

Keyword(s):

Food Quality ◽

Food Industry ◽

Low Cost ◽

Antimicrobial Properties ◽

Renewable Sources ◽

Antimicrobial Packaging ◽

Bibliographic Analysis ◽

Antimicrobial Films ◽

Microbial Agents ◽

Over Time

Food Codex requires safe products and packaging is an important factor to comply with this consumer right, so developing packaging with antimicrobial properties that protect the product by eliminating or inhibiting bacteria or pathogens that cause damage to health is important in the food industry. The objective of this work was to perform a bibliographic analysis of some additives that generate antimicrobial properties in packaging by reviewing some studies that have developed antimicrobial films or also called smart films. Microbial agents have become an important factor in maintaining food quality over time. Biopolymers are an excellent alternative due to their availability, low cost, biodegradability and their origin are from renewable sources.

Download Full-text

Production and Characterization of Keratin/Tragacanth Gum Nanohydrogels for Drug Delivery in Medical Textiles

Frontiers in Materials ◽

10.3389/fmats.2021.720385 ◽

2021 ◽

Vol 8 ◽

Author(s):

Nazanin Mansouri Shirazi ◽

Niloofar Eslahi ◽

Adeleh Gholipour-Kanani

Keyword(s):

Disulfide Bonds ◽

Antibacterial Properties ◽

Antimicrobial Properties ◽

Spherical Shape ◽

Herbal Extract ◽

Minimum Size ◽

Mechanical Resistance ◽

Tragacanth Gum ◽

Medical Textiles

Keratin protein has been applied for biomedical applications due to its biocompatibility, biodegradability, mechanical resistance, and bioavailability. Tragacanth gum (TG) as a polysaccharide-based biopolymer has wound healing and antimicrobial properties. In this study, keratin was extracted from protein-based chicken feather by using reduction hydrolysis (sodium sulfide), and nanogels of keratin and TG composites at different ratios were produced by using the chemical cross-linking method. Then, cinnamon (5 and 10%) as an antibacterial herbal extract was added to the nanogels and coated on cotton fabric. The morphology and size of the composite nanogels, chemical structure, biological, and antibacterial properties were evaluated. According to DLS results, TGK2:1 (ratio of TG to keratin = 2:1) had the minimum size (80 nm) and PDI (0.1), and therefore, this sample was chosen as the optimum one. FESEM and TEM images showed the semi-spherical shape of the produced nanogels. FTIR spectra revealed the possible hydrogen bonding between the components, and the formation of disulfide bonds after the addition of hydrogen peroxide was confirmed by XPS. After loading cinnamon into the nanogels, an increase in size was observed from 80 nm for free-nanogel to 85 and 105 nm for 5 and 10% extract-loaded nanogels, respectively. Besides, more cinnamon was released from the treated fabrics by increasing time and cinnamon concentration. The antibacterial test exhibited good antibacterial properties against both Gram-positive and Gram-negative bacteria. Finally, MTT assay approved the biocompatibility of the produced nanogels for potential use in medical textiles.

Download Full-text

Barrier and Antibacterial Properties of 2-Octyl Cyanoacrylate-Derived Wound Treatment Films

Journal of Cutaneous Medicine and Surgery ◽

10.1177/120347540300700101 ◽

2003 ◽

Vol 7 (1) ◽

pp. 1-6 ◽

Cited By ~ 29

Author(s):

Patricia M. Mertz ◽

Stephen C. Davis ◽

Alejandro L. Cazzaniga ◽

Anna Drosou ◽

William H. Eaglstein

Keyword(s):

Staphylococcus Aureus ◽

Pseudomonas Aeruginosa ◽

Bacterial Contamination ◽

Antibacterial Properties ◽

Antimicrobial Properties ◽

Bacterial Invasion ◽

Wound Treatment ◽

Antimicrobial Study ◽

And Control ◽

Number Of Bacteria

Background: Besides enhancing healing, an ideal dressing should prevent invasion of pathogens and control the number of bacteria already present in the wounds. Objective: To evaluate the barrier and antimicrobial properties of a cyanoacrylate-based bandage (LAB) against Staphylococcus aureus or Pseudomonas aeruginosa on partial thickness wounds in swines. Methods: Barrier study: Bacteria were inoculated over test materials (LAB, standard bandage, air-exposed) that were placed over wounds. The bacteria from wounds were quantitated at 24, 48, and 72 hours postinoculation. Antimicrobial study: Wounds inoculated with bacteria were covered with LAB, standard bandage, or hydrocolloid bandage or left air-exposed. The bacteria recovered from wounds were quantitated at 24 and 72 hours after treatment. Results: Barrier study: No bacteria were recovered from LAB-treated wounds. Antimicrobial study: LAB reduced the number of inoculated bacteria in comparison to all other groups. Conclusion: LAB is effective in protecting wounds from external bacterial invasion and reducing bacterial contamination.

Download Full-text

Synthesis and Antimicrobial Properties of Zinc Oxide Nanoparticles

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2020.18707 ◽

2020 ◽

Vol 20 (10) ◽

pp. 5977-5996 ◽

Cited By ~ 1

Author(s):

Saee Gharpure ◽

Balaprasad Ankamwar

Keyword(s):

Zinc Oxide ◽

Zno Nanoparticles ◽

Zinc Oxide Nanoparticles ◽

Metal Oxide Nanoparticles ◽

Antibacterial Properties ◽

Antimicrobial Properties ◽

Physical Contact ◽

Oxide Nanoparticles ◽

Synthesis Methods ◽

Promising Alternative

With increase in incidence of multidrug resistant pathogens, there is a demand to adapt newer approaches in order to combat these diseases as traditional therapy is insufficient for their treatment. Use of nanotechnology provides a promising alternative as antimicrobial agents as against traditional antibiotics. Metal oxides have been exploited for a long times for their antimicrobial properties. Zinc oxide nanoparticles (ZnO NPs) are preferred over other metal oxide nanoparticles because of their bio-compatible nature and excellent antibacterial potentials. The basic mechanism of bactericidal nature of ZnO nanoparticles includes physical contact between ZnO nanoparticles and the bacterial cell wall, generation of reactive oxygen species (ROS) as well as free radicals and release of Zn2+ ions. This review focuses on different synthesis methods of ZnO nanoparticles, various analytical techniques frequently used for testing antibacterial properties, mechanism explaining antibacterial nature of ZnO nanoparticles as well as different factors affecting the antibacterial properties.

Download Full-text

Applications of PANI Thin Films

Advances in Chemical and Materials Engineering - Properties, Techniques, and Applications of Polyaniline (PANI) Thin Films ◽

10.4018/978-1-5225-9896-1.ch006 ◽

2020 ◽

pp. 157-194

Keyword(s):

Thin Films ◽

Solar Cells ◽

Low Cost ◽

Oxidative Polymerization ◽

Dye Sensitized Solar Cells ◽

Antimicrobial Properties ◽

Rechargeable Batteries ◽

Dye Sensitized ◽

Optical Ph Sensors ◽

Sensitized Solar Cells

Polypyrrole, polythiophene, and PANI are inherently conducting polymers (ICPs), which show electrical properties just like metals and semiconductors. Aniline has low cost, so it makes PANI the least expensive and thermally stable from all ICPs. PANI is conducting in nature, but due to its less solubility and melting processability, it has not much attention for commercial purposes. PANI might be used for commercial purposes following by some additional improvements. It can be synthesized by electrochemical and chemical oxidative polymerization. PANI thin films can be used in the detection of gases as gas sensors, chemical and biological sensors, optical pH sensors, etc. These films can also be used in supercapacitors, electrochromic devices, solar cells, dye-sensitized solar cells, rechargeable batteries, electrochemical filter, protection of metal surface from corrosion, etc. PANI thin films can also be used in biological applications such as antimicrobial properties, and the various researchers across the globe have the most widely studied tissue engineering applications.

Download Full-text

Zinc(II) Complexes with Amino Acids for Potential Use in Dermatology: Synthesis, Crystal Structures, and Antibacterial Activity

Molecules ◽

10.3390/molecules25040951 ◽

2020 ◽

Vol 25 (4) ◽

pp. 951 ◽

Cited By ~ 3

Author(s):

Michał Abendrot ◽

Lilianna Chęcińska ◽

Joachim Kusz ◽

Katarzyna Lisowska ◽

Katarzyna Zawadzka ◽

...

Keyword(s):

Amino Acids ◽

Antibacterial Activity ◽

Antibacterial Properties ◽

Antimicrobial Properties ◽

X Ray Diffraction ◽

Organic Zinc ◽

Counter Ions ◽

Open Issue ◽

Potential Use ◽

Active Substances

The multifunctional profile of Zn2+ has influenced its great popularity in various pharmaceutical, food, and cosmetic products. Despite the use of different inorganic and organic zinc derivatives, the search for new zinc-containing compounds with a safer skin profile still remains an open issue. The present paper describes the synthesis, structural characterization, and antibacterial activity of zinc(II) complexes with proteinogenic amino acids as potential candidates for dermatological treatments. The obtained complexes are of the general formula [Zn(AA)2], where AA represents an amino acid (L-Glu, Gly, L-His, L-Pro, L-Met, and L-Trp). Their synthesis was designed in such a way that the final bis(aminoacidate) zinc(II) complexes did not contain any counter-ions such as Cl−, NO3−, or SO42− that can cause some skin irritations. The chemical structure and composition of the compounds were identified by 1H NMR spectroscopy and elemental analysis, and four were also characterized by single-crystal X-ray diffraction. The Hirshfeld surface analysis for the Zn2+ metallic center helped to determine its coordination number and geometry for each complex. Finally, the antibacterial properties of the complexes were determined with respect to three Gram-positive strains, viz. Staphylococcus aureus ATCC 6538, Staphylococcus epidermidis ATCC 12228, and Streptococcus pyogenes ATCC 19615, and two Gram-negative bacteria, viz. Escherichia coli ATCC 25992 and Pseudomonas aeruginosa ATCC 27853, and were compared with the activity of zinc 2-pirrolidone 5-carboxylate (ZnPCA), commonly applied in dermatology. It was found that the Zn(II) complexes with methionine and glycine exhibited a higher antibacterial activity than the tested standard, and the antimicrobial properties of complex with Trp were satisfactory. The results of the antimicrobial activity examination allow us to postulate that the obtained zinc complexes might become new active substances for use in dermatological products.

Download Full-text

ZnO Nanostructures with Antibacterial Properties Prepared by a Green Electrochemical-Thermal Approach

Nanomaterials ◽

10.3390/nano10030473 ◽

2020 ◽

Vol 10 (3) ◽

pp. 473 ◽

Cited By ~ 1

Author(s):

Maria Chiara Sportelli ◽

Rosaria Anna Picca ◽

Margherita Izzi ◽

Gerardo Palazzo ◽

Roberto Gristina ◽

...

Keyword(s):

Low Cost ◽

Electrochemical Techniques ◽

Antibacterial Properties ◽

Thermal Method ◽

Thermal Treatments ◽

Zno Nanostructures ◽

Transmission Electron ◽

Morphological Modification ◽

Synthetic Routes ◽

Physical And Chemical

Zinc oxide (ZnO) nanostructures are widely applied materials, and are also capable of antimicrobial action. They can be obtained by several methods, which include physical and chemical approaches. Considering the recent rise of green and low-cost synthetic routes for nanomaterial development, electrochemical techniques represent a valid alternative to biogenic synthesis. Following a hybrid electrochemical-thermal method modified by our group, here we report on the aqueous electrosynthesis of ZnO nanomaterials based on the use of alternative stabilizers. We tested both benzyl-hexadecyl-dimetylammonium chloride (BAC) and poly-diallyl-(dimethylammonium) chloride (PDDA). Transmission electron microscopy images showed the formation of rod-like and flower-like structures with a variable aspect-ratio. The combination of UV–Vis, FTIR and XPS spectroscopies allowed for the univocal assessment of the material composition as a function of different thermal treatments. In fact, the latter guaranteed the complete conversion of the as-prepared colloidal materials into stoichiometric ZnO species without excessive morphological modification. The antimicrobial efficacy of both materials was tested against Bacillus subtilis as a Gram-positive model microorganism.

Download Full-text