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Journal of Phytomedicine and Therapeutics ; 21(2):922-930, 2022.
Article in English | EMBASE | ID: covidwho-2163963
Int Dent J ; 2022 Oct 20.
Article in English | MEDLINE | ID: covidwho-2076168


OBJECTIVE: The aim of this research was to investigate the effect of various mouthwashes for COVID-19 prevention on surface hardness, roughness, and colour changes of bulk-fill and conventional resin composites and determine the pH and titratable acidity of mouthwashes. METHODS: Four hundred eighty specimens were fabricated in cylindrical moulds (10 mm in diameter and 2 mm in thickness). Before immersion, baseline data of surface hardness, roughness, and colour values were recorded. Each product of specimens (Filtek Z350XT, Premise, Filtek One Bulk Fill Restorative, SonicFil 2) were divided into 4 groups for 0.2% povidone iodine, 1% hydrogen peroxide, 0.12% chlorhexidine, and deionised water (serving as a control). The specimens were immersed in mouthwashes for 1 minute and then stored in artificial saliva until 24 hours. This process was repeated for 14 days. After immersion, surface hardness, roughness, and colour values of specimens were measured at 7 and 14 days. The data were statistically analysed by 2-way repeated analysis of variance, Tukey honestly significant difference, and t test (P < .05). RESULTS: After immersion, all mouthwashes caused significantly lower surface hardness and greater roughness and colour values (P < .05) on all resin composites tested. CONCLUSIONS: Mouthwashes had an effect on all resin composites evaluated leading to a significant decreased surface hardness and an increased roughness and colour values (P < .05).

Physical Chemistry Research ; 10(3):429-438, 2022.
Article in English | Scopus | ID: covidwho-2056781
Meat Research / Roulei Yanjiu ; 36(6):29-35, 2022.
Article in Chinese | CAB Abstracts | ID: covidwho-2056249
Journal of the American Academy of Dermatology ; 87(3):AB87, 2022.
Article in English | EMBASE | ID: covidwho-2031383
Acta Montanistica Slovaca ; 27(2):368-383, 2022.
Article in English | Scopus | ID: covidwho-1989062
Medicine and Pharmacy Reports ; 95(2):1-4, 2022.
Article in English | EMBASE | ID: covidwho-1885098
Uttar Pradesh Journal of Zoology ; 42(10):75-89, 2021.
Article in English | CAB Abstracts | ID: covidwho-1717238
9th Annual Conference on Large Hadron Collider Physics, LHCP 2021 ; 397, 2021.
Article in English | Scopus | ID: covidwho-1668619
Journal of Computational Biophysics and Chemistry ; 20(08):815-827, 2021.
Article in English | Web of Science | ID: covidwho-1582939
Polymers (Basel) ; 13(13)2021 Jun 23.
Article in English | MEDLINE | ID: covidwho-1389504


Optically transparent wood is a type of composite material, combining wood as a renewable resource with the optical and mechanical properties of synthetic polymers. During this study, the effect of monochromatic UV-C (λ-250 nm) radiation on transparent wood was evaluated. Samples of basswood were treated using a lignin modification method, to preserve most of the lignin, and subsequently impregnated with refractive-index-matched types of acrylic polymers (methyl methacrylate, 2-hydroxyethyl methacrylate). Optical (transmittance, colour) and mechanical (shore D hardness) properties were measured to describe the degradation process over 35 days. The transmittance of the samples was significantly decreased during the first seven days (12% EMA, 15% MMA). The average lightness of both materials decreased by 10% (EMA) and 17% (MMA), and the colour shifted towards a red and yellow area of CIE L*a*b* space coordinates. The influence of UV-C radiation on the hardness of the samples was statistically insignificant (W+MMA 84.98 ± 2.05; W+EMA 84.89 ± 2.46), therefore the hardness mainly depends on the hardness of used acrylic polymer. The obtained results can be used to assess the effect of disinfection of transparent wood surfaces with UV-C radiation (e.g., due to inactivation of SARS-CoV-2 virus) on the change of its aesthetic and mechanical properties.