scholarly journals Antibacterial Properties of Calcium Fluoride-Based Composite Materials:In VitroStudy

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Monika Łukomska-Szymańska ◽  
Beata Zarzycka ◽  
Janina Grzegorczyk ◽  
Krzysztof Sokołowski ◽  
Konrad Półtorak ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Composite Material ◽  
Composite Materials ◽  
Calcium Fluoride ◽  
Antibacterial Properties ◽  
Fluoride Ions ◽  
Cariogenic Bacteria ◽  
Bacteria Growth ◽  
Light Curing ◽  
Fluoride Addition

The aim of the study was to evaluate antibacterial activity of composite materials modified with calcium fluoride against cariogenic bacteriaS. mutansandL. acidophilus. One commercially available conventional light-curing composite material containing fluoride ions (F2) and two commercially available flowable light-curing composite materials (Flow Art and X-Flow) modified with 1.5, 2.5, and 5.0 wt% anhydrous calcium fluoride addition were used in the study. Composite material samples were incubated in 0.95% NaCl at 35°C for 3 days; then dilution series ofS. mutansandL. acidophilusstrains were made from the eluates. Bacteria dilutions were cultivated on media afterwards. Colony-forming unit per 1 mL of solution (CFU/mL) was calculated. Composite materials modified with calcium fluoride highly reduced (p<0.001) bacteria growth compared to commercially available composite materials containing fluoride compounds. The greatest reduction in bacteria growth was observed for composite materials modified with 1.5% wt. CaF2. All three tested composite materials showed statistically greater antibacterial activity againstL. acidophilusthan againstS. mutans.

scholarly journals Mechanical Properties of Calcium Fluoride-Based Composite Materials

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Monika Łukomska-Szymańska ◽  
Joanna Kleczewska ◽  
Joanna Nowak ◽  
Mariusz Pryliński ◽  
Agata Szczesio ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Material ◽  
Composite Materials ◽  
Vickers Hardness ◽  
Calcium Fluoride ◽  
Water Storage ◽  
Dry Storage ◽  
Light Curing ◽  
Fluoride Addition

Aim of the study was to evaluate mechanical properties of light-curing composite materials modified with the addition of calcium fluoride. The study used one experimental light-curing composite material (ECM) and one commercially available flowable light-curing composite material (FA) that were modified with 0.5–5.0 wt% anhydrous calcium fluoride. Morphology of the samples and uniformity of CaF2distribution were analyzed using Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). Mechanical properties were tested after 24-hour storage of specimens in dry or wet conditions. Stored dry ECM enriched with 0.5–1.0 wt% CaF2showed higher tensile strength values, while water storage of all modified ECM specimens decreased their tensile strength. The highest Vickers hardness tested after dry storage was observed for 2.5 wt% CaF2content in ECM. The addition of 2.0–5.0 wt% CaF2to FA caused significant decrease in tensile strength after dry storage and overall tensile strength decrease of modified FA specimens after water storage. The content of 2.0 wt% CaF2in FA resulted in the highest Vickers hardness tested after wet storage. Commercially available composite material (FA), unmodified with fluoride addition, demonstrated overall significantly higher mechanical properties.

scholarly journals The Effect of Ag Content of the Chitosan-Silver Nanoparticle Composite Material on the Structure and Antibacterial Activity

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Solmaz Akmaz ◽  
Esra Dilaver Adıgüzel ◽  
Muzaffer Yasar ◽  
Oray Erguven
Keyword(s):  
Antibacterial Activity ◽  
Composite Material ◽  
Composite Materials ◽  
Silver Nanoparticle ◽  
Antibacterial Properties ◽  
Chitosan Solution ◽  
X Ray Diffraction ◽  
Properties And Characterization ◽  
Transmission Electron

The aim of this study is to investigate the antibacterial properties and characterization of chitosan-silver nanoparticle composite materials. Chitosan-silver nanoparticle composite material was synthesized by adding AgNO3and NaOH solutions to chitosan solution at 95°C. Different concentrations (0,02 M, 0,04 M, and 0,06 M) of AgNO3were used for synthesis. Chitosan-silver nanoparticle composite materials were characterized by Transmission electron microscopy (TEM), X-ray diffraction (XRD), ultraviolet (UV) spectrophotometer, and Fourier transform infrared (FTIR) spectrometer techniques.Escherichia coli,Acinetobacter baumannii,Staphylococcus aureus,Enterococcus faecalis,Pseudomonas aeruginosa, andStreptococcus pneumoniaewere used to test the bactericidal efficiency of synthesized chitosan-Ag nanoparticle composite materials. The biological activity was determined by the minimum bacterial concentration (MBC) of the materials. Antibacterial effect of chitosan-silver nanoparticle materials was increased by increasing Ag amount of the composite materials. The presence of small amount of metal nanoparticles in the composite was enough to significantly enhance antibacterial activity as compared with pure chitosan.

Antibacterial Effect of New Bioceramic Pulp Capping Material on the Main Cariogenic Bacteria

2016 ◽  
Vol 17 (5) ◽  
pp. 349-353 ◽  
Author(s):  
Fahiem MM Elshamy ◽  
Husham Elraih ◽  
Iti Gupta ◽  
Faisal AI Idris
Keyword(s):  
Antibacterial Activity ◽  
Antibacterial Effect ◽  
Antibacterial Properties ◽  
Mineral Trioxide Aggregate ◽  
Mutans Streptococci ◽  
Repair Material ◽  
Cariogenic Bacteria ◽  
Pulp Capping ◽  
Root Repair ◽  
Significant Difference

ABSTRACT Background The purpose of this research was to assess the antibacterial activity of a new bioceramic pulp capping material (endosequence root repair material [ERRM]) against the main cariogenic bacteria: Salivary mutans streptococci (MS) and lactobacilli and compare the results with mineral trioxide aggregate (MTA) and calcium hydroxide (Dycal). Materials and methods The isolation of MS group bacteria and Lactobacillus (LB) spp. from stimulated saliva was performed with in-office caries risk test bacteria dip slide test. Endosequence root repair material, MTA (ProRoot MTA), and Dycal were used as pulp capping materials. Mutans Streptococci and LB were scattered on the agar dishes with a swab. The pulp capping materials under study were placed in the wells and prepared in the agar, immediately after mixing. The dishes were incubated for 24 hours at 37°C. The growth inhibition zones were recorded and compared for every material and bacterial strain. One-way analysis of variance test was done to compare the development of growth inhibition of selected bacteria against testing materials. Post hoc Tukey honest significant difference was conducted to compare each material group. Results All the three selected pulp capping materials were found to inhibit the bacteria LB and MS. The antibacterial activity of ERRM and ProRoot MTA was significantly better than the Dycal. Against MS, ERRM and MTA showed no statistically significant difference. Mineral trioxide aggregate showed significantly better inhibitory activity against LB. Conclusion Endosequence root repair material and MTA had superior antibacterial properties against the main cariogenic bacteria: MS and LB compared with Dycal. Clinical significance A pulp-capping agent having good antibacterial properties can have better success rate in maintaining the vitality of the tooth while treating deep carious lesions in patients. How to cite this article Elshamy FMM, Singh G, Elraih H, Gupta I, AI Idris F. Antibacterial Effect of New Bioceramic Pulp Capping Material on the Main Cariogenic Bacteria. J Contemp Dent Pract 2016;17(5):349-353.

In-situ coated of Ag, ZnO, Ag/ZnO composite nano particles to the technical fiber by hydrothermal method

2016 ◽  
Vol 28 (3) ◽  
pp. 340-367 ◽  
Author(s):  
Demet Kucuk ◽  
Onur Balci ◽  
Mustafa Tutak
Keyword(s):  
Antibacterial Activity ◽  
Composite Materials ◽  
Hydrothermal Method ◽  
Antibacterial Properties ◽  
Testing Procedure ◽  
Test Method ◽  
Nano Particles ◽  
Content Type ◽  
Antibacterial Textiles

Purpose – Nowadays, the usage of antibacterial textiles is very popular for different type of textiles. The silver (Ag) and zinc oxide (ZnO) are the most popular materials in order to improve antibacterial properties of textiles. The purpose of this paper is to investigate the possibility to produce Ag nanoparticle (NP), ZnO NP, Ag/ZnO NP composite materials in this experimental study. Design/methodology/approach – It was investigated whether it was possible to produce Ag NP, ZnO NP, Ag/ZnO NP composite materials by hydrothermal method which was known as in-situ approach on the fiber. In addition, the colloidal silver (Ag+) was produced by electrolysis method, and used instead of process water which was necessary during generating of NPs on the fiber by this method. After whole applications, the samples were characterized by SEM, XRD, EDX analyses and the antibacterial activity of specimens was tested according to the ASTM E 2149-01 (gram-negative Escherichia coli). In addition, the resistance to the repeated washes of these antibacterial samples was investigated. Findings – The production of NPs on the fiber was achieved. The results showed that the samples had sufficient antibacterial activity and this activity did not reduce depending on repeated washing treatments. Research limitations/implications – Because of usage of one type of fiber, it would be necessary to make researches on the different type of fiber, testing procedure (with different bacteria), washing replications and prescriptions. Practical implications – During the process the temperature control is very important for the produced fiber. In addition chosen antibacterial test method is crucial for the testing of activity of product. Fiber must be washed at least once to remove unfixed NPs on the fiber. Originality/value – The technical antibacterial polyester fiber was in-situ coated by hydrothermal method with Ag, ZnO, Ag/ZnO composite NPs.

Nano-boron as an Antibacterial Agent for Functionalized Textiles

2015 ◽  
Vol 1793 ◽  
pp. 53-57
Author(s):  
Wazir Akbar ◽  
Ayse Karagoz ◽  
G.Bahar Basim ◽  
Mohamed Noor ◽  
Tofail Syed ◽  
...  
Keyword(s):  
Particle Size ◽  
Antibacterial Activity ◽  
Antibacterial Agent ◽  
Antibacterial Properties ◽  
Nano Particles ◽  
Fastness Properties ◽  
Shape Stability ◽  
Gram Negative ◽  
Bacteria Growth ◽  
Before And After

ABSTRACTThe antibacterial properties of boron-containing compounds are well known although there are limited studies available on the pure boron nanoparticles. In this study boron nano-particles were characterized in terms of their particle size, shape, stability and surface charge before and after they are applied to textile surfaces to study their impact on antibacterial activity in addition to cytotoxicity. It was observed that the boron nano-particles are affective in limiting bacteria growth on both gram-negative and gram-positive species without requiring any stimulation to initiate the antibacterial action. It was also found that the application of boron nano-particles on the textile surfaces through mixing them in hydrophobic finishing solutions helped improve the wettability performance of the textiles while showing no change in the physical and colour fastness properties at an optimal concentration of 0.02 % w/v of finishing solution.

Fluoride Release and Antibacterial Activity of Self-Made Composite Materials for Dental Fillings

2009 ◽  
Vol 147-149 ◽  
pp. 801-806 ◽  
Author(s):  
Joanna Mystkowska ◽  
Grażyna Marczuk-Kolada ◽  
Katarzyna Leszczyńska ◽  
Jan Ryszard Dąbrowski ◽  
Joanna Karaś
Keyword(s):  
Antibacterial Activity ◽  
Composite Materials ◽  
Bacterial Strains ◽  
Diffusion Test ◽  
Selective Electrode ◽  
Fluoride Ions ◽  
Direct Potentiometry ◽  
Dental Fillings ◽  
Agar Diffusion Test ◽  
Fluoride Ion Selective Electrode

In the paper own prepared materials with addition fluorine sources were evaluated. The aim of the study was to assess the quality and quantity of fluoride source on fluoride ions release from composite materials. Antibacterial activity of analyzed materials in relation to four bacteria was investigated. Fluoride ions release was measured by direct potentiometry method with fluoride ion selective electrode. The measurements were carried out after 1, 4, 7, 14, 30, 60 days of storage in buffer at pH 6.8. The antibacterial activity of the materials was evaluated against standard bacterial strains using the agar diffusion test. Tests show that the highest level of fluoride ions emission was observed for composite with fluoridated glass (material A) on the seventh day of the study. Similar fluoride ions amount was released from material consisted of fluoridated glass and ytterbium fluoride (material C), but not until on the thirtieth day of the study. After 24 hours of composite bonding there was inhibition of bacterial growth by composite C, whereas composite A did not show similar activity. On the eighth day after polymerization, both materials were significantly more active towards two bacteria.

Review: Studies on the Synthesis of Quinolone Derivatives with Their Antibacterial Activity (Part 1)

2020 ◽  
Vol 24 (8) ◽  
pp. 817-854
Author(s):  
Anil Kumar ◽  
Nishtha Saxena ◽  
Arti Mehrotra ◽  
Nivedita Srivastava
Keyword(s):  
Antibacterial Activity ◽  
Antibacterial Properties ◽  
Structure Activity Relationship ◽  
New Drugs ◽  
Activity Relationship ◽  
Structure Activity ◽  
Medicinal Properties ◽  
Synthetic Routes ◽  
Quinolone Derivatives

Quinolone derivatives have attracted considerable attention due to their medicinal properties. This review covers many synthetic routes of quinolones preparation with their antibacterial properties. Detailed study with structure-activity relationship among quinolone derivatives will be helpful in designing new drugs in this field.

Fluoroquinolone-3-carboxamide Amino Acid Conjugates: Synthesis, Antibacterial Properties And Molecular Modeling Studies

2020 ◽  
Vol 17 (1) ◽  
pp. 71-84
Author(s):  
Riham M. Bokhtia ◽  
Siva S. Panda ◽  
Adel S. Girgis ◽  
Hitesh H. Honkanadavar ◽  
Tarek S. Ibrahim ◽  
...  
Keyword(s):  
Experimental Data ◽  
Antibacterial Activity ◽  
Amino Acid ◽  
Bacterial Infections ◽  
Antibacterial Agents ◽  
Antibacterial Properties ◽  
Computational Studies ◽  
Protecting Group ◽  
Amino Acid Conjugates ◽  
Molecular Modeling Studies

Background: Bacterial infections are considered as one of the major global health threats, so it is very essential to design and develop new antibacterial agents to overcome the drawbacks of existing antibacterial agents. Method: The aim of this work is to synthesize a series of new fluoroquinolone-3-carboxamide amino acid conjugates by molecular hybridization. We utilized benzotriazole chemistry to synthesize the desired hybrid conjugates. Result: All the conjugates were synthesized in good yields, characterized, evaluated for their antibacterial activity. The compounds were screened for their antibacterial activity using methods adapted from the Clinical and Laboratory Standards Institute. Synthesized conjugates were tested for activity against medically relevant pathogens; Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27856) Staphylococcus aureus (ATCC 25923) and Enterococcus faecalis (ATCC 19433). Conclusion: The observed antibacterial experimental data indicates the selectivity of our synthesized conjugates against E.Coli. The protecting group on amino acids decreases the antibacterial activity. The synthesized conjugates are non-toxic to the normal cell lines. The experimental data were supported by computational studies.

Study of the Composite Materials Optimal Structure Containing a Hollow Aluminum and Silica Microsphere Dependence on Humidity

2020 ◽  
Vol 12 ◽  
Author(s):  
Alexandra Atyaksheva ◽  
Yermek Sarsikeyev ◽  
Anastasia Atyaksheva ◽  
Olga Galtseva ◽  
Alexander Rogachev
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Strength Function ◽  
Theory And Practice ◽  
Optimal Structure ◽  
Optimal Size ◽  
Structure And Properties ◽  
Power Functions ◽  
Silica Microsphere ◽  
Heat Engineering

Aims:: The main goals of this research are exploration of energy-efficient building materials when replacing natural materials with industrial waste and development of the theory and practice of obtaining light and ultra-light gravel materials based on mineral binders and waste dump ash and slag mixtures of hydraulic removal. Background.: Experimental data on the conditions of formation of gravel materials containing hollow aluminum and silica microsphere with opportunity of receipt of optimum structure and properties depending on humidity with the using of various binders are presented in this article. This article dwells on the scientific study of opportunity physical-mechanical properties of composite materials optimization are considered. Objective.: Composite material contains hollow aluminum and silica microsphere. Method.: The study is based on the application of the method of separation of power and heat engineering functions. The method is based on the use of the factor structure optimality, which takes into account the primary and secondary stress fields of the structural gravel material. This indicates the possibility of obtaining gravel material with the most uniform distribution of nano - and microparticles in the gravel material and the formation of stable matrices with minimization of stress concentrations. Experiments show that the thickness of the cement shell, which performs power functions, is directly related to the size of the raw granules. At the same time, the thickness of the cement crust, regardless of the type of binder, with increasing moisture content has a higher rate of formation for granules of larger diameter. Results.: The conditions for the formation of gravel composite materials containing a hollow aluminosilicate microsphere are studied. The optimal structure and properties of the gravel composite material were obtained. The dependence of the strength function on humidity and the type of binder has been investigated. The optimal size and shape of binary form of gravel material containing a hollow aluminosilicate microsphere with a minimum thickness of a cement shell and a maximum strength function was obtained. Conclusion.: Received structure allows to separate power and heat engineering functions in material and to minimize the content of the excited environment centers.

scholarly journals Hydrothermally Assisted Fabrication of TiO2-Fe3O4 Composite Materials and Their Antibacterial Activity

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4715
Author(s):  
Adam Kubiak ◽  
Marta Kubacka ◽  
Elżbieta Gabała ◽  
Anna Dobrowolska ◽  
Karol Synoradzki ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Composite Materials ◽  
Bet Surface Area ◽  
Molar Ratio ◽  
Oxide Content ◽  
Gram Positive ◽  
Gram Negative ◽  
Transmission Electron ◽  
Xrd Patterns ◽  
Oxide Composites

The TiO2-Fe3O4 composite materials were fabricated via the hydrothermal-assisted technique. It was determined how the molar ratio of TiO2 to Fe3O4 influences the crystalline structure and morphology of the synthesized composite materials. The effect of the molar ratio of components on the antibacterial activity was also analyzed. On the basis of XRD patterns for the obtained titanium(IV) oxide-iron(II, III) oxide composites, the two separate crystalline forms—anatase and magnetite —were observed. Transmission electron microscopy revealed particles of cubic and tetragonal shape for TiO2 and spherical for Fe3O4. The results of low-temperature nitrogen sorption analysis indicated that an increase in the iron(II, III) oxide content leads to a decrease in the BET surface area. Moreover, the superparamagnetic properties of titanium(IV) oxide-iron(II, III) oxide composites should be noted. An important aim of the work was to determine the antibacterial activity of selected TiO2-Fe3O4 materials. For this purpose, two representative strains of bacteria, the Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus, were used. The titanium(IV) oxide-iron(II, III) oxide composites demonstrated a large zone of growth inhibition for both Gram-positive and Gram-negative bacteria. Moreover, it was found that the analyzed materials can be reused as antibacterial agents in three consecutive cycles with good results.

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