scholarly journals Antibacterial activity and effects of aromatic derivatives on denture base polymerization.

2019 ◽  
Vol S (1) ◽  
pp. 24-27
Author(s):  
Ammar AG. Alhamdani ◽  
◽  
Arjwan M. Shuker ◽  
Inas A. Jawad ◽  
◽  
...  

This study assessed the effect of copolymerization on the microbiota of the oral cavity. The plant extraction was converted into aromatic derivatives, which were added to methyl methacrylate monomer. Fourier transform infrared spectroscopy spectra showed no negative effects of these additives on the polymerization process. All the assayed derivatives displayed some degree of antibacterial activity.

2018 ◽  
Vol 28 (2) ◽  
pp. 429-432
Author(s):  
Dilyana Zvezdova

Chitosan, a hydrophilic biopolymer industrially obtained by N-deacetylation of chitin, can be applied as an antimicrobial agent. It highlights the applications of chitosan as an antimicrobial agent against fungi, bacteria, and viruses and as an elicitor of plant defense mechanisms. A series of novel chitosan-sulfathiazole nanocomposite (CSFZ) films were prepared by using solvent casting method for wound healing application. Fourier transform infrared spectroscopy (FTIR) was employed to ascertain the interaction between negatively charged sulfathiazole and positively charged chitosan. Moreover, the antibacterial activity of the films was investigated against gram positive and gram negative microorganisms. It was found that all CSFZ films showed good inhibitory activity against all the tested bacteria as compared to control. The above analysis suggested that the CSFZ films could be used as potential candidates for wound healing application.


2020 ◽  
pp. 4-6
Author(s):  
Joy PT ◽  
Bennett Atlin Correya ◽  
V. K Zahida ◽  
Gilsa K. Vasunni ◽  
Julie George Alapatt

The conversion of monomer to polymer is not complete in denture base resins and residual monomer left can cause mucosal irritation, inflammation, and allergic reactions in tissues adjacent to dentures. The mechanical properties of denture base resins have been found to be lacking with increased residual monomer content. Therefore, it is desirable to reduce the residual monomer content in the processed denture. In the present study Gas chromatography method was used to determine the levels of residual methyl methacrylate monomer of two different brands of heat cure denture base resins processed by two different polymerization cycles. The study concluded that while processing the denture sufficient length of boiling phase should be given and for each brand, manufacturer’s instructions should be strictly followed while selecting polymerization cycle.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tahir Mehmood ◽  
Mudassir Iqbal ◽  
Bushra Rafique

AbstractImidazole has anti-inflammatory, antituberculotic, antimicrobial, antimycotic, antiviral, and antitumor properties in the human body, to name a few. Metronidazole [1-(2-Hydroxyethyl)-2-methyl-5-nitroimidazole] is a widely used antiprotozoan and antibacterial medication. Using fourier transform infrared spectroscopy, the current study models the antibacterial activity of already synthesised Metronidazole (MTZ) complexes ($$MTZ-Benz$$ M T Z - B e n z , $$MTZ-Benz-Cu$$ M T Z - B e n z - C u , $$MTZ-Benz-Cu-Cl_2CHCOOH$$ M T Z - B e n z - C u - C l 2 C H C O O H , $$MTZ$$ MTZ , $$MTZ-Cu$$ M T Z - C u , $$MTZ-Cu-Cl_2CHCOOH$$ M T Z - C u - C l 2 C H C O O H , $$MTZ-Benz-Ag$$ M T Z - B e n z - A g , $$MTZ-Benz-Ag-Cl_2CHCOOH$$ M T Z - B e n z - A g - C l 2 C H C O O H , $$MTZ-Ag$$ M T Z - A g and $$MTZ-Ag-Cl_2CHCOOH$$ M T Z - A g - C l 2 C H C O O H ) against E. coli, B. bronceptica, S. epidermidis, B. pumilus and S. aureus. To characterise the Metronidazole complexes for antibacterial activity against 05 microbes, the least angular regression and least absolute shrinkage selection operators were used. Asymmetric Least Squares was used to correct the spectrum baseline. Least angular regression outperforms cross-validated root mean square error in the fitted models. Using Least angular regression, influential wavelengths that explain the variation in antibacterial activity of Metronidazole complexes were identified and mapped against functional groups.


2009 ◽  
Vol 29 (4) ◽  
pp. 391-395 ◽  
Author(s):  
Juliê Marra ◽  
André Gustavo Paleari ◽  
Ana Carolina Pero ◽  
Raphael Freitas de Souza ◽  
Débora Barros Barbosa ◽  
...  

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
H. M. Saleh ◽  
H. A. Shatta

Solidified cured cement blocks containing different concentrations of the borate waste simulate were impregnated using methyl methacrylate monomer having 0.3% by weight benzoyl peroxide as initiator. Then, the polymerization process was completed by heating the impregnated blocks at ≈40°C. To define the suitability, range of applicability, and compatibility of the inert matrix used, relevant to the borate waste immobilized, the final radioactive borate waste forms are evaluated on the basis of their mechanical and chemical properties. Some factors that may affect the characterization of the obtained final waste form, for example, concentration of the incorporated borate waste solution simulate, aging of the solid waste form, before immersion, immersion in various leachants, and time of immersion, were followed systematically. It could be stated that cement-poly(methylmethacrylate) composite exhibited better mechanical and chemical characters compared to the cement as a unique matrix for immobilization of borate waste concentrates.


Author(s):  
B Aksakal ◽  
M Demirel

Selenium (Se)- and Silver (Ag)-doped Bioglass®-based biografts were synthesized using the sol–gel method. Fourier-transform infrared spectroscopy, inductively coupled plasma mass spectrometry, scanning electron microscopy and energy-dispersive X-ray analyses were carried out in order to examine mechanostructure of synthesized bioglass-based bioceramics. The effects of Se and Ag additions on cell viability were investigated via cytotoxicity and antibacterial activity analysis, respectively. The bacteria of Escherichia coli ( E. coli, JM103) and Gram-positive Staphylococcus aureus ( S. aureus, ATCC29293) were used to perform the antibacterial tests. Moreover, cell viability studies were conducted using the Saos-2 osteoblast cells by performing dimethylthiazol diphenyltetrazolium bromide assay. It was observed that while (PO4)3− and (CO3)2− peaks were observed in Fourier-transform infrared spectroscopy analyses, crystallinity also increased with increasing amount of AgNO3 addition into the Bioglass®. In addition, it was determined from scanning electron microscopy images that small irregular thin lamellar grain distribution was formed in synthesized B45Ag5Se20 and B30Ag10Se15 biografts. From antibacterial activity tests, it was determined that while some grafts was affected by E. coli, which is a Gram-negative, however, some did not affect the Gram-positive S. aureus and had antimicrobial activity on E. coli and S. aureus. According to the cell viability tests, it was found that the synthesized grafts did not have toxic effect on living cells. While the cell growth was greater for some grafts, however, some others had lower growth.


ScienceAsia ◽  
2020 ◽  
Vol 46S (1) ◽  
pp. 97
Author(s):  
Pornchiwin Banjong ◽  
Natthawika Sankham ◽  
Watchara Duangnga ◽  
Uraiwan Intatha ◽  
Nattakan Soykeabkaew ◽  
...  

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
MI Aguilar ◽  
Y Piñón ◽  
A Mejía ◽  
G Díaz-Ruiz ◽  
S Sánchez-Nieto ◽  
...  

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