Orman Endüstri Mühendisliği Bölümü Yayın Koleksiyonuhttps://hdl.handle.net/11494/3252024-03-29T05:57:11Z2024-03-29T05:57:11ZSynthesis and characterization of some azole derivatives as potential biological and anticancer agentsUygun Cebeci, YıldızCeylan, ŞuleAltun, MuhammedAlpay Karaoğlu, Şengülhttps://hdl.handle.net/11494/48672023-04-03T08:09:51Z2023-01-01T00:00:00ZSynthesis and characterization of some azole derivatives as potential biological and anticancer agents
Uygun Cebeci, Yıldız; Ceylan, Şule; Altun, Muhammed; Alpay Karaoğlu, Şengül
Thetreatmentof4-{[(1E)-(2,4-dichlorophenyl)meth-ylene]amino}-5-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one
2023-01-01T00:00:00ZSelection of materials with entropy-topsis by considering technological properties of impregnated woodErsen, NadirPeker, HüseyinAkyüz, İlkerhttps://hdl.handle.net/11494/47392023-03-02T07:03:55Z2022-01-01T00:00:00ZSelection of materials with entropy-topsis by considering technological properties of impregnated wood
Ersen, Nadir; Peker, Hüseyin; Akyüz, İlker
In this study, the hybrid Entropy-TOPSIS method is applied to the problem of selecting an optimal impregnation material
with maximum performance requirements. Swelling, shrinkage, bending strength, modulus of elasticity, compressive
strength and shock strength values were used to rank the impregnation materials. Barite, boric acid, borax and their
mixture were used to impregnation material. The impregnation materials used in the study generally increased the
physical and mechanical properties of the spruce specimens, except swelling. The impregnation materials reduced the
swelling of the specimens. According to the entropy method, the most important factor affecting the success of the
impregnation process was the modulus of elasticity. According to the TOPSIS method, the most successful impregnation
material was a mixture of barite and boric acid. Moreover, the proposed method was compared with other Multi-Criteria
Decision-Making (MCDM) approaches and it can be used to ranking of impregnation materials with reliable accuracy
2022-01-01T00:00:00ZAnatomical structure and copper microdistribution in mechanical, biological, and laser ıncised spruce and larch refractory woodsBakır, Davuthttps://hdl.handle.net/11494/47072023-04-20T09:31:29Z2023-01-01T00:00:00ZAnatomical structure and copper microdistribution in mechanical, biological, and laser ıncised spruce and larch refractory woods
Bakır, Davut
The anatomical structure of wood and the application of three different incision pretreatments affect the distribution of preservatives in refractory woods. This study focused on Picea orientalis (L.) Peterm.) and Larix decidua Mill. and investigated the distribution of copper-based preservatives in the wood microstructure. Different incision pretreatments were applied before impregnation to increase the permeability of spruce and larch sapwood samples. After the incision pretreatments, transverse cross-sectional surfaces of the samples were sealed with polyurethane-based paint to prevent excessive preservative uptake into open ends of longitudinal tracheid lumens. The samples were then impregnated with Celcure C4, by applying a vacuum method. The structure of wood samples with preservatives before and after the incision pretreatments were observed. Copper microdistribution was observed to increase significantly in refractory wood species after different incision pretreatments, especially in larch wood. The degradation of pits caused by biological incision effectively increased the microdistribution of copper. The difference in the microdistribution of increased copper with the laser and mechanical incision pretreatments – following the same incision model – was attributed to the different anatomical structure and density of spruce and larch wood species and the fact that the hole depth and geometry were different in the laser and mechanical incision processes.
2023-01-01T00:00:00ZFarklı delme ön işlemleri sonrası Avrupa melezi ve Doğu ladini odunlarının basınç direnci ve bazı fiziksel özelliklerindeki değişikliklerBakır, Davuthttps://hdl.handle.net/11494/43572022-12-28T11:58:29Z2022-01-01T00:00:00ZFarklı delme ön işlemleri sonrası Avrupa melezi ve Doğu ladini odunlarının basınç direnci ve bazı fiziksel özelliklerindeki değişiklikler
Bakır, Davut
Farklı delme (insizing) ön işlemleri emprenyesi güç odun türlerinin permeabilitesini artırmak için uygulanan teknolojik yöntemlerdir. Son zamanlarda farklı delme ön işlemlerinin odunun fiziksel ve mekanik özelliklerinde meydana getirdiği değişikliklerin belirlenmesine yönelik büyük bir ilgi söz konusudur. Çünkü uygulanan tüm delme ön işlemlerinden sonra odunun fiziksel özelliklerinin olumsuz yönde değişmemesi ve mekanik özelliklerde düşüş olmaması önemlidir. Bu nedenle Picea orientalis (L.) Peterm and Larix decidua Mill. diri odun örneklerinin bazı fiziksel özellikleri ve liflere paralel basınç direnci üzerinde mekanik, biyolojik ve lazer delme ön işlemlerinin etkileri incelendi. Uygulanan her ön işlemden sonra meydana gelen ağırlık kayıpları, yoğunluk, liflere paralel basınç direnci ve hacimsel genişleme ve daralma değerleri değerlendirildi. Elde edilen sonuçlara göre; hem ladin hem de melez diri odun örneklerinde en yüksek ağırlık kayıpları (ladin: 9.82%; melez: 8.47%) biyolojik delme uygulanmış örneklerde gözlenirken en düşük ağırlık kayıpları (ladin: 1.12%: melez: 1.66%) ise mekanik delme uygulanmış örneklerde gözlendi. Melez odununda hacimsel daralma ve genişleme lazer delme ön işlemi neticesinde azalmıştır. Fakat ladin odununda uygulanan tüm delme ön işlem grupları ile kontrol örnekleri arasında önemli bir fark bulunamamıştır. Lazer delme uygulanan melez odun örneklerinde yoğunluk azalmasına rağmen ladin odun örneklerinde uygulanan tüm ön işlemler ile kontrol örnekleri arasında istatistiksel olarak önemli bir değişiklik gözlenmemiştir. Diğer taraftan, ladin ve melez odun örneklerinde liflere paralel basınç direnci ise lazer ve biyolojik delme sonrasında azalmıştır.; Different incising pretreatments are technological processes to improve the permeability of refractory wood species. In recent years, there has been an increasing interest in determining the changes in the physical and mechanical properties of wood as a result of different incising processes. Because it is important that the physical properties of wood do not change negatively and there is no weakening in the mechanical properties after all incising pretreatments. Therefore, the effects of mechanical, biological, and laser incising pretreatments on some physical properties and compressive strength parallel to the grain of Picea orientalis L. and Larix decidua Mill. sapwood samples were studied. The weight losses occurred in the samples, density, compressive strength parallel to the grain, and volumetric shrinkage and swelling values of the woods were evaluated after every pretreatment. According to the results, the highest weight losses (spruce: 9.82%; larch: 8.47%) were observed in the bioincised samples, and the lowest weight losses (spruce: 1.12%: larch: 1.66%) occurred in the mechanically incised samples in both spruce and larch sapwoods. The volumetric shrinkage and swelling in larch decreased laser incising pretreatments, however, there was no significant difference among all incising pretreatment groups in spruce. The density decreased laser incised larch wood samples, however, no statistically significant change in the spruce wood samples was observed in all incising pretreatments. On the other hand, the compressive strength parallel to the grain in spruce and larch wood samples decreased after laser incising and bioincising.
2022-01-01T00:00:00Z