Browsing by Author "Ozkan, OE"
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Web of Science Characteristics of a Protective Layer on Oil Heat-Treated Scots Pine and Fir Wood(2017.01.01) Kesik, HI; Ozkan, OE; Oncel, MWeb of Science Chemical Composition and Antimicrobial Activity in Cold Press Oil of Fennel, Anise, White and Black Mustard Seeds(2017.01.01) Olgun, C; Ozkan, OE; Guney, B; Pattabanoglu, ES; Guney, K; Gur, MWeb of Science Chemical composition and antimicrobial activity of Myristica fragrans & Elettaria cardamomum essential oil(2018.01.01) Ozkan, OE; Olgun, C; Guney, B; Gur, M; Guney, K; Ates, SWeb of Science Chemical Contents and Antifungal Activity of Some Durable Wood Extractives vs. Pleurotus ostreatus(2015.01.01) Ates, S; Gur, M; Ozkan, OE; Akca, M; Olgun, C; Guder, AWeb of Science COATING PERFORMANCES OF CRIMEAN JUNIPER (Juniperus excelsa M. BIEB.) WOOD(2019.01.01) Oncel, M; Vurdu, H; Kaymakci, A; Ozkan, OE; Aydogan, HWeb of Science Determination of Antimicrobial Activity and Chemical Composition of Pimento & Ginger Essential Oil(2017.01.01) Sener, N; Ozkinali, S; Gur, M; Guney, K; Ozkan, OE; Khalifa, MMWeb of Science DNA protection, antioxidant, antibacterial and enzyme inhibition activities of heartwood and sapwood extracts from juniper and olive woods(2015.01.01) Ozkan, OE; Zengin, G; Akca, M; Baloglu, MC; Olgun, C; Altuner, EM; Ates, S; Aktumsek, A; Vurdu, HPublication Effect of Freezing Temperature on Impact Bending Strength and Shore-D Hardness of Some Wood Species(2022-01-01) Özkan O.E.; Ozkan, OEWood is exposed to variable environmental conditions during its use. Low temperature is one of the most important environmental factors affecting the behavior of wood in use. Contrary to other mechanical properties, there are not enough studies on how the impact bending strength is affected during freezing of wood. This study evaluated the effect of various freezing temperatures (-20,-40,-78.5, and-196 °C) on the impact bending strengths of beech (Fagus orientalis Lipsky), Scotch pine (Pinus sylvestris L.), fir (Abies nordmanniana subsp. bornmulleriana), and spruce (Picea orientalis L.) wood in comparison with non-frozen wood (+20 °C). During the freezing, the impact bending strength generally increased in softwood species but decreased in hardwood. The highest drop in impact bending strength value of-30.6% was found at-196 °C for beech wood. For this reason, precautions should be taken when using beech wood at ultra-low temperatures, due to substantial decreases in impact bending strength values. The good impact bending strength properties of the softwood while frozen allows application in low temperature environments.Web of Science Web of Science Effect of post-heat treatment on fire retardant treated wood properties(2022.01.01) Ozkan, OE; Temiz, A; Tor, O; Vurdu, HWeb of Science EFFECT OF ULTRA-LOW TEMPERATURE ON SOME MECHANICAL PROPERTIES OF PAINTED AND FILM-COATED PLYWOOD(2023.01.01) Oncel, M; Ozkan, OEPublication Effects of cryogenic temperature on some mechanical properties of beech (Fagus orientalis Lipsky) wood(2021-03-01) Özkan O.E.; Ozkan, OEIt is important to know the changes in the mechanical properties of wood during freezing for engineering calculations of the wood material to be used in cold environments. Although this is important, the mechanical properties of wood at temperatures below − 100 °C have rarely been studied. In this study, the effects of cryogenic temperature (− 196 °C) on the bending strength, modulus of elasticity in bending and compression strength parallel to the grain of oven-dried and air-dried beech wood was investigated. As a result of the experiment, the mechanical strength properties of the wood increased during freezing. The increase in bending strength and modulus of elasticity values were higher in air-dried wood than those in oven-dried wood. However, the increase in compression strength values was determined at the same rates as 61% for air-dried and oven-dried wood. This increase in mechanical strength properties of wood during freezing could be explained by freezing of water in the wood, hardening of wood cell walls, decreasing intermolecular distance, increasing intermolecular force and stabilization of crystalline structure.Web of Science Web of Science Effects of heat treatment on some properties of MDF (medium-density fiberboard)(2017.01.01) Ates, S; Kara, HR; Olgun, C; Ozkan, OEWeb of Science EFFECTS OF HEAT TREATMENT ON TURKISH FIR WOOD PROPERTIES(2017.01.01) Ozkan, OE; Temiz, A; Vurdu, HWeb of Science Essential Oil of Oregano and Savory; Chemical Composition and Antimicrobial Activity(2017.01.01) Ozkan, OE; Guney, K; Gur, M; Pattabanoglu, ES; Babat, E; Khalifa, MMWeb of Science Hardness and Adhesion Characteristics of Protective Layer on Oil Heat Treated Scots Pine Wood(2015.01.01) Kesik, HI; Vurdu, H; Cagatay, K; Ozkan, OE; Oncel, MWeb of Science Publication Investigation of the Radiation Shielding Properties of Black Pine Wood Impregnated with Boric Acid(2020.01.01) Ozkan, OE; Osman Emre ÖZKANAim of study: The present work is to investigate the radiation shielding properties of impregnatedblack pine (Pinus nigra Arnold subsp. pallasiana) wood material by measuring linear attenuationscoefficient, mass attenuations coefficient, half value and tenth value layer thickness for different gammaenergies from 5 keV to 1000 keV.Material and methods: The values of linear attenuation coefficient (1/cm), mass attenuationcoefficient (cm2/g), half value and tenth value layer thickness of impregnated wood material werecalculated in energy range between 5 to 1000 keV using the WinXCOM based Phy-X/PSD software andcompared with concrete.Main results: It has been found that the linear attenuation coefficient and the mass attenuationcoefficient of impregnated wood decrease as photon energy increases. But, half value layer and tenthvalue layer of impregnated wood increased as photon energy increased. As a result, it was found that theradiation shielding properties of wood increasing with boric acid impregnation.Highlights: The radiation shielding properties of impregnated wood are higher than pine woodbecause of its high density and chemical composition, which contains boron elementsWeb of Science New 1,3,4-thiadiazole compounds including pyrazine moiety: Synthesis, structural properties and antimicrobial features(2017.01.01) Gur, M; Sener, N; Muglu, H; Cavus, MS; Ozkan, OE; Kandemirli, F; Sener, I