Yazarlar
Yayınlar
- MakaleAçık Erişim2026Scopus SJRQ3Analysis of the Impact of Blue Stain on the Color, Glossiness, and Whiteness Properties of Scots Pine Lumber
Ayata, Ümit; Peker, Hüseyin; Ulay, Göksel; Çamlıbel, Osman; Atilgan, Abdi
It is known that blue stain causes a loss of price value for Scots pine wood in the wood trade due to the visual defects it creates. In this study, color parameters [red color tone (a*), lightness (L*) value, yellow (b*) color tone, tone angle (h°) value, and chroma (C*) value], whiteness index (WI*) values, and glossiness measurements [at angles of 20°, 60°, and 85°] were compared in Scots pine (Pinus sylvestris L.) wood with normal and blue rot conditions. According to the color parameters obtained, it was determined that the L* value decreased by 11.43%, a* by 79.95%, b* by 28.86%, and C* by 32.75%, while the h° value increased by 17.74%. With the blue coloration, decreases were observed in the 20° glossiness values measured in the ⃦ and ⊥ directions, while increases were observed in the 60° and 85° glossiness values measured in the ⃦ and ⊥ directions. With the blue coloration, decreases of 12.86% in the ⊥ direction and 29.87% in the ⃦ direction in the WI* values were observed. According to these results, it was determined that the wood material with the blue coloration disease had a darker color.
- MakaleAçık Erişim2025Scopus SJRQ3Application of the entropy based COPRAS model in determining the most appropriate irrigation systems for agricultural enterprises producing maize
Ulay, Göksel; Peker, Hüseyin; Ayata, Ümit
Synthetic-based furniture varnish (colorless and glossy) was applied in two coats using a brush to the following wood types: lemon (Citrus limon (L.) Burm.), black pine (Pinus nigra Arnold), kotibé (Nesogordonia papaverifera), iroko (Milicia excelsa Welw. C.C. Berg), and loquat (Eriobotrya japonica Lindl.). The color parameters [b*, ho, L*, a*, and C*, ∆a*, ∆L*, ∆C*, ∆H*, ∆b*, and ∆E*] of the varnished and unvarnished 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 ∆E* values derived from color formulas were sorted from the lowest to the highest, they were ordered as follows: lemon, black pine, kotibé, 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 ho values increased. Additionally, for iroko, loquat, and kotibé woods, there was an increase in the a* parameter, while ho values decreased for these wood types. Overall, the varnish application resulted in color changes in the wood materials.
