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Browsing by Author "Ayata, Umit"

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    Article
    Application of Synthetic-Based Furniture Varnish To Various Wood Species: Comparison of Color Parameters
    (North Carolina State Univ dept Wood & Paper Sci, 2025) Ulay, Goksel; Peker, Huseyin; Ayata, Umit
    Synthetic-based furniture varnish (colorless and glossy) was applied in two coats using a brush to the following wood types: lemon (Citrus limon (L.) surfaces were compared. The analysis of variance results for all color parameters revealed significant effects for wood type, varnish application, and their interaction. When the AE* values derived from color formulas were sorted from the lowest to the highest, they were ordered as follows: lemon, black pine, kotibe, loquat, and iroko. After varnish application, decreases in L* values were observed across all wood types, while increases in b* and C* values were detected. In black pine wood, the a* and h degrees values increased. Additionally, for iroko, loquat, and kotibe woods, there was an increase in the a* parameter, while h degrees values decreased for these wood types. Overall, the varnish application resulted in color changes in the wood materials.
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    Article
    Effects of Formaldehyde Scavenger on Mechanical, Physical, and Emission Test Results in Multi-Layer Pressed Chipboard Production
    (Inst Technol Drewna, 2025) Camlibel, Osman; Peker, Huseyin; Ayata, Umit; Ulay, Goksel
    This study investigates the effects of different formaldehyde scavenger (FS) ratios on the physical, mechanical, and chemical properties of fiberboard composites. Experimental analyses included measurements of thickness, density, modulus of rupture (MOR), modulus of elasticity (MOE), internal (WA), and formaldehyde emission (FE) levels. The results indicate that an increase in the FS ratio leads to a significant decline in mechanical properties. Specifically, MOR, MOE, and IB values decreased by 17.97%, 15.65%, and 16.33%, respectively. Changes in TS and WA were also observed, with TS increasing by up to 22.68% and WA decreasing by as much as 16.90%. In terms of formaldehyde emissions, a significant reduction was observed as the FS ratio increased. At a 15% FS ratio, formaldehyde emissions decreased by 43.24%, which is considered a positive outcome in terms of environmental and health impacts. Overall, the use of FS in specific ratios reduces FE while causing certain reductions in mechanical properties. These findings highlight the importance of optimizing FS usage for the production of low-FE fiberboards.