scholarly journals Influence of Nanofinishes on the Antimicrobial Properties of Fabrics

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
N. Gokarneshan ◽  
P. P. Gopalakrishnan ◽  
B. Jeyanthi
Keyword(s):  
Antibacterial Property ◽  
Antimicrobial Properties ◽  
Antibacterial Efficacy ◽  
Nano Materials ◽  
Cotton Wool ◽  
Natural Materials ◽  
Application Method ◽  
Synthetic Materials ◽  
Medical Textiles ◽  
Number Of Microorganisms

This paper critically reviews the influence of the various types of nanomaterials on the antibacterial property of the treated fabrics. The merits of each type of nanomaterial have been compared. The synthesis and application method of each type are highlighted. As the number of microorganisms is growing increasingly resistant to antibiotics, the need to treat fabrics with nano materials becomes important in order to improve the antibacterial efficacy over a range of bacterium and fungi. The various researches reported herein show a promise for wider applications in medical textiles. Nano finishes have been applied on natural materials such as cotton, wool, and silk and also synthetic materials such as PET fabrics, with interesting results.

Disinfection of Fruits with Activated Water

2019 ◽  
Vol 10 ◽  
pp. 1864-1872
Author(s):  
Prof. Teodora P. Popova
Keyword(s):  
Antimicrobial Activity ◽  
Aqueous Solutions ◽  
Antimicrobial Properties ◽  
The Other ◽  
Gram Negative Bacteria ◽  
High Antimicrobial Activity ◽  
Gram Negative ◽  
E Coli ◽  
Number Of Microorganisms ◽  
Lower Effect

The effect of ionized aqueous solutions (anolytes and catholyte) in the processing of fruits (cherries, morellos, and strawberries) for decontamination has been tested. Freshly prepared analytes and catholyte without the addition of salts were used, as well as stored for 7 months anolytes, prepared with 0.5% NaCl and a combination of 0.5% NaCl and 0.5% Na2CO3. The anolyte prepared with a combination of 0.5% NaCl and 0.5% Na2CO3, as well as the anolyte obtained with 0.5% NaCl, exhibit high antimicrobial activity against the surface microflora of strawberries, cherries, and sour cherries. They inactivate E. coli for 15 minutes. The other species of the fam. Enterobacteriaceae were also affected to the maximum extent, as is the total number of microorganisms, especially in cherries and sour cherries. Even stored for 7 months, they largely retain their antimicrobial properties. Anolyte and catholyte, obtained without the addition of salts, showed a lower effect on the total number of microorganisms, but had a significant effect on Gram-negative bacteria, and especially with regard to the sanitary indicative E. coli.

scholarly journals Biocompatibility and Bone Formation of Flexible, Cotton Wool-like PLGA/Calcium Phosphate Nanocomposites in Sheep

2011 ◽  
Vol 5 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Oliver D Schneider ◽  
Dirk Mohn ◽  
Roland Fuhrer ◽  
Karina Klein ◽  
Käthi Kämpf ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Bone Formation ◽  
Antimicrobial Properties ◽  
Drill Hole ◽  
Bone Defects ◽  
Long Bone ◽  
Minimal Amount ◽  
Cotton Wool

Background: The purpose of this preliminary study was to assess the in vivo performance of synthetic, cotton wool-like nanocomposites consisting of a biodegradable poly(lactide-co-glycolide) fibrous matrix and containing either calcium phosphate nanoparticles (PLGA/CaP 60:40) or silver doped CaP nanoparticles (PLGA/Ag-CaP 60:40). Besides its extraordinary in vitro bioactivity the latter biomaterial (0.4 wt% total silver concentration) provides additional antimicrobial properties for treating bone defects exposed to microorganisms. Materials and Methods: Both flexible artificial bone substitutes were implanted into totally 16 epiphyseal and metaphyseal drill hole defects of long bone in sheep and followed for 8 weeks. Histological and histomorphological analyses were conducted to evaluate the biocompatibility and bone formation applying a score system. The influence of silver on the in vivo performance was further investigated. Results: Semi-quantitative evaluation of histology sections showed for both implant materials an excellent biocompatibility and bone healing with no resorption in the adjacent bone. No signs of inflammation were detectable, either macroscopically or microscopically, as was evident in 5 µm plastic sections by the minimal amount of inflammatory cells. The fibrous biomaterials enabled bone formation directly in the centre of the former defect. The area fraction of new bone formation as determined histomorphometrically after 8 weeks implantation was very similar with 20.5 ± 11.2 % and 22.5 ± 9.2 % for PLGA/CaP and PLGA/Ag-CaP, respectively. Conclusions: The cotton wool-like bone substitute material is easily applicable, biocompatible and might be beneficial in minimal invasive surgery for treating bone defects.

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

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.

scholarly journals Synthesis and Antibacterial Studies of Novel Phosphorus Ligand 5-(2-diphenylphosphino) phenyl-1,2-dihydro-1,2,4-triazole-3-thione and its Metal Complexes with some Transition Metals

2010 ◽  
Vol 4 (2) ◽  
pp. 37-45
Author(s):  
Matheel D. Al-Sabti ◽  
Ahmed A. H. Al-Amiery ◽  
Thorria R. Marzoog ◽  
Yasmien K. Al-Majedy
Keyword(s):  
Metal Complexes ◽  
Free Ligand ◽  
Antimicrobial Properties ◽  
Cadmium Complex ◽  
Gram Positive Bacteria ◽  
Visible Spectra ◽  
Number Of Microorganisms ◽  
Ft Ir ◽  
The Stability

This study involves the chemical synthesis of the novel ligand 5-(2-diphenylphosphino) phenyl-1,2-dihydro-1,2,4-triazole-3-thione (DPDTT) by the reaction of 2-diphenylphosphino benzoic acid with absolute ethanol that yield ethyl 2-diphenylphosphino benzoate and by cyclization of this compound with thiosemicarbazide, DPDTT will be produced. The chelating complexes of this ligand with Cr(III), Co(II), Ni(II), Cu(II) and Cd(II) were also prepared and studied. The new complexes were characterized by FT-IR, UV/visible spectra, and room temperature magnetic susceptibility. The stability for the prepared complexes was also measured using the density function theory and it was found that the cadmium complex is the most stable and the chromium complex is the least stable. Free ligand and its metal complexes have been tested in vitro against a number of microorganisms, like gram positive bacteria Staphylococcus aureus and gram negative bacteria E. coli, Proteus vulgaris, Pseudomonas and Klebsiella in order to assess their antimicrobial properties. All complexes showed considerable activity against all the studied bacteria.

Antibacterial Efficiency and Cellular Toxicity of PET-Based Hollow Fibers Containing Silver Particles

2012 ◽  
Vol 441 ◽  
pp. 279-283 ◽  
Author(s):  
Ling Lin ◽  
Yun Neng Chen ◽  
Wen Zhong Gong ◽  
Shan Yuan Wang
Keyword(s):  
Hollow Fiber ◽  
Antibacterial Property ◽  
Silver Content ◽  
Silver Ions ◽  
Hollow Fibers ◽  
Antibacterial Efficacy ◽  
Silver Particles ◽  
Sem Images ◽  
Cellular Toxicity ◽  
Significant Toxicity

This work focuses on antibacterial efficacy and cellular toxicity of PET-based hollow fiber with silver particles incorporated (Ag/PET hollow fiber), which was synthesized by differential pressure method. Escherichia coli (E. coli) were used to investigate the antibacterial capability of Ag/PET hollow fiber with antibacterial kinetics experiments. The antibacterial results demonstrated that Ag/PET hollow fiber had an excellent antibacterial property against E. coli and the efficacy was dependent on several aspects including fiber length, weight and silver content. The cytotoxicity of Ag/PET hollow fibers on WI-38 cells was assessed using Methyl Thiazolyl Tetrazolium (MTT) assay, and the results showed no significant toxicity to WI-38 cells. SEM images of WI-38 cells treated by Ag/PET hollow fibers showed that cells morphology was unaltered in the presence of Ag/PET hollow fiber. However, abnormal size, shrinkage and rounded appearance of cells at higher dose suggested slight toxicity of Ag/PET hollow fiber. Combining the antibacterial and cytotoxic results, it was found that there was a certain concentration of silver ions which can achieve a minimization of cytotoxicity and a maximization of antibacterial efficacy.

scholarly journals FABRIKASI FERROGEL BERBAHAN DASAR NANOPARTIKEL MAGNETIT (Fe3O4) DARI HASIL SINTESIS PASIR BESI PANTAI UTARA JAWA DAN SIFAT MAGNETO-ELASTISITASNYA

2013 ◽  
Author(s):  
Retno Rahmawati ◽  
Handayani Handayani
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Building Materials ◽  
North Coast ◽  
Artificial Muscles ◽  
Economic Values ◽  
Natural Materials ◽  
Central Java ◽  
Synthetic Materials ◽  
Additional Phase

<p>Iron sand is one of natural materials that has been widely explored and so far is  only used  as building materials. This research provides solutions to increase the economic values of iron sand, by preparing ferrogel from iron sand. The purpose of this research is to prepare Fe3O4 nanoparticles-based-ferrogel from  synthetic  Fe3O4   prepared  from  iron  sand.  The  iron  sand  was obtained from north coast of Central Java. The preparation of synthetic Fe3O4 produced nanoparticles having a size of 82,42 – 110,9 nm . The characterization using XRD indicated that Fe2O4 content in the iron sand was 30%, and increased to 76% in the synthetic materials. In addition, the synthetic materials has additional phase of Al0.95  Ga0.05.  The ferrogel was prepared by mixing the synthetic materials with PVA (Polyphinyl alcohol). The ferrogel was characterized for its magnetoelasticity properties so that it can be used for artificial muscles. The results of magneto-elasticity ferrogel characterization showed that the higher the concentration of Fe3O4 filler in PVA matrix, the higher the deviation and elongation. However, the impurity of Al0.95 Ga0.05 in the ferrogel seemed to cause its magnetoelasticity to be less than optimum.</p>

scholarly journals COMPARATIVE EFFECT OF SELF VS DUAL CURING ON ANTIBACTERIAL PROPERTY IN A NOVEL DENTAL RESTORATIVE MATERIAL- AN INVITRO STUDY

2021 ◽  
Vol 9 (4) ◽  
pp. 764-768
Author(s):  
Vigneshwari S.K ◽  
◽  
Manje Gowda ◽  
Jayalakshmi K.B ◽  
Dhanavel. C ◽  
...  
Keyword(s):  
Dental Caries ◽  
Streptococcus Mutans ◽  
Antibacterial Property ◽  
Antibacterial Efficacy ◽  
Restorative Material ◽  
Comparative Effect ◽  
Curing Methods ◽  
Light Curing ◽  
Dual Curing ◽  
Dental Restorative

Aim: To evaluate and compare the antibacterial efficacy of Cention-N in two different curing methods. Methods: Twenty blocks of Cention-N were prepared according to standard manufacturers instructions and were divided into two groups-self cured and light cured (ten blocks in each group). Streptococcus mutans were extracted from dental caries by a series of biochemical treatments and strains of S.mutans were treated with both groups of Cention-N blocks. Results: Self cured Cention-N blocks exhibited statistically significant reduction in bacterial colonies compared to Light-cured blocks. Conclusion: Additional light curing inhibits the antibacterial efficacy of Cention-N cement.

scholarly journals Functionalization of medical textiles

2020 ◽  
Vol 1 (2) ◽  
pp. 88-95
Author(s):  
Natalija Sadretdinova ◽  
Sergey Bereznenko ◽  
Larisa Bilotska ◽  
Maria Pawłowa ◽  
Szafrańska Halina ◽  
...  
Keyword(s):  
Human Body ◽  
Antimicrobial Properties ◽  
Surface Characteristics ◽  
Raw Material ◽  
Production Environment ◽  
Textile Materials ◽  
Medical Textiles ◽  
Number Of Factors ◽  
Hospital Patients ◽  
The Impact

An important basis for the creation of medical clothing is realization of the influence of various factors that arise in the interaction of elements of the system "man–clothes–production environment". Given the increasing technogenic burden on health of both medical staff and hospital patients, the assessment of the role of medical clothing in forming the energy balance of direct consumers is extremely relevant. Previous studies have experimentally confirmed the presence of energy effects of textile materials on the human body. However, determination of the nature of the impact is a complex task, which solution depends on a number of factors, such as the raw material composition, its structure, surface characteristics, etc. The purpose of our paper is to study the development of textile multifunctional materials for medical purposes and to study their energy-information impact on the human body. The following tasks have been solved in the course of the study. For use in the medical field, several samples of textile materials with antimicrobial properties, modified by herbal preparations, were obtained. Properties of textile materials that determine the possibility of their use in medical practice have been investigated. The influence of the experimental samples on the functional state of the organs and systems of human organs by use of the methods of information-wave therapy is evaluated.

Germ-Reducing Titanium Dioxide - Silicone Rubber Composites

2020 ◽  
Vol 976 ◽  
pp. 3-8
Author(s):  
Theresa Fischer ◽  
Susana Suttor ◽  
Salma Mansi ◽  
Markus Ahrens ◽  
Markus Eblenkamp
Keyword(s):  
Titanium Dioxide ◽  
Silicone Rubber ◽  
Bulk Material ◽  
Matrix Material ◽  
Polymer Surface ◽  
Antimicrobial Properties ◽  
Photocatalytic Effect ◽  
Synthetic Materials ◽  
The Matrix ◽  
Materials Research

Germs are present in all areas of everyday life and can lead to dangerous infections. Surfaces with antimicrobial properties are used to reduce the risk of infection in sanitary facilities and hospitals. Apart from the addition of biocides or antibiotic agents to synthetic materials, research shows that it is possible to use the semiconductor titanium dioxide (TiO2) to generate antibacterial surfaces. Photocatalytically active TiO2 leads to the development of reactive oxygen species (ROS) that are able to kill germs. The aim of this research is to use TiO2 to generate antibacterial bulk material. Nanostructured TiO2 particles were incorporated into silicone rubber to obtain a photocatalytic active polymer surface. High temperature vulcanizing (HTV) silicone rubber was used as a matrix material, and samples with 10 wt% of TiO2 were produced. The distribution of TiO2 particles in the matrix was analyzed via light microscopy. The photocatalytic activity on the surface of the test samples was studied via microbial testing with E.coli bacteria. The samples showed different intensities of the photocatalytic effect depending on the type of additive. The effort to create a germ reducing silicone rubber surface by using TiO2 as an additive was successful.

scholarly journals Rheological and Antimicrobial Properties of Chitosan and Quinoa Protein Filmogenic Suspensions with Thyme and Rosemary Essential Oils

Foods ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1616
Author(s):  
Monserrat Escamilla-García ◽  
Raquel A. Ríos-Romo ◽  
Armando Melgarejo-Mancilla ◽  
Mayra Díaz-Ramírez ◽  
Hilda M. Hernández-Hernández ◽  
...  
Keyword(s):  
Essential Oils ◽  
Food Packaging ◽  
Antimicrobial Agents ◽  
Negative Impact ◽  
Micrococcus Luteus ◽  
Antimicrobial Properties ◽  
Antimicrobial Effect ◽  
Rheological Parameters ◽  
Force Microscopy ◽  
Synthetic Materials

Food packaging faces the negative impact of synthetic materials on the environment, and edible coatings offer one alternative from filmogenic suspensions (FS). In this work, an active edible FS based on chitosan (C) and quinoa protein (QP) cross-linked with transglutaminase was produced. Thyme (T) and rosemary (R) essential oils (EOs) were incorporated as antimicrobial agents. Particle size, Z potential, and rheological parameters were evaluated. The antimicrobial activity against Micrococcus luteus (NCIB 8166) and Salmonella sp. (Lignieres 1900) was monitored using atomic force microscopy and image analysis. Results indicate that EOs incorporation into C:QP suspensions did not affect the Z potential, ranging from −46.69 ± 3.19 mV to −46.21 ± 3.83 mV. However, the polydispersity index increased from 0.51 ± 0.07 to 0.80 ± 0.04 in suspensions with EO. The minimum inhibitory concentration of active suspensions against Salmonella sp. was 0.5% (v/v) for thyme and 1% (v/v) for rosemary. Entropy and fractal dimension of the images were used to confirm the antimicrobial effect of EOs, which modified the surface roughness.

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