Yazar "Tascioglu, Cihat" seçeneğine göre listele

Listeleniyor 1 - 6 / 6
  • Küçük Resim
    Öğe
    Damage severity of wood-destroying insects according to the Bevan damage classification system in log depots of Northwest Turkey
    (Nature Research, 2020) Yalcin, Mesut; Akcay, Caglar; Tascioglu, Cihat; Yuksel, Besir; Ozbayram, Ali Kemal
    The aim of the study was to determine damage severity of wood-destroying insects on logs stored in forest depots. The Bevan damage classification (BDC) system, developed in 1987, was utilized to determine damage severity in log depots in 21 locations throughout seven provinces in Turkey. Pheromone traps were placed in those locations at the beginning of April in 2015 and 2016. Furthermore some stored wood within the log depots were checked and split into small pieces to collect insects that damage wood. The BDC system was used for the first time to measure the severity of insect damage in log depots. Twenty-eight families, 104 genera and 123 species were identified in this study. Based on the BDC system, the highest damage was found from the Cerambycidae and Buprestidae families. Arhopalus rusticus was determined as the insect responsible for the highest amount of damage with 8.8% severity rating in the pheromone-trapped insects group. When the stored wood material was considered, Hylotrupes bajulus was found to be the cause of the highest damage. The lowest damage values were among the predator insects (Cleridae, Trogossitidae, Cantharidae) and those feeding on fungi colonized on the wood (Mordellidae, Cerylonidae, Nitidulidae). Some other predator insects of the Tenebrionidae family (Uloma cypraea, Uloma culinaris, Menephilus cylindricus) and Elateridae family (Lacon punctatus, Ampedus sp.) exhibited relatively higher damage severity values since they had built tunnels and made holes in the stored wood material. When the environmental factors were considered, the Buprestidae family exhibited a very strong positive relationship (p<0.005) with insect frequency distribution (r=0.922), number of species (r=0.879) and insect density (r=0.942). Both families showed the highest number and frequency during July and August, highlighting the importance of insect control and management during these months.
  • Küçük Resim
    Öğe
    DETERMINATION OF METAL CORROSION IN WOOD TREATED WITH NEW-GENERATION WATER-BORNE PRESERVATIVES
    (Inst Technol Drewna, 2020) Can, Ahmet; Sivrikaya, Huseyin; Tascioglu, Cihat
    In this study, the corrosion performances of ammonium copper quaternary (ACQ) and boric acid (BA) wood preservatives were investigated, with micronized copper quaternary (MCQ) and nano boron (NB) used as reference materials. In the study Scots pine (Pinus sylvestris L.) wood samples were impregnated according to the full-cell process method with ACQ at 2.4% concentration, BA at 4% and MCQ and NB at 1%. The ACQ- and BA-impregnated samples were then impregnated for a second time using five different water-repellent materials: tall oil, linseed oil, sodium silicate, methyl hydrogen silicone and N'-N-(1,8-naphthalyl)hydroxylamine. Polyethylene glycol (PEG) 600 and aluminum sulfate were introduced as single impregnations in the form of homogeneous mixtures with ACQ and BA. The corrosion properties of the impregnated and control samples, including metal weight loss (MWL) and corrosion depth, were examined. The MWL values of the ACQ-impregnated samples showed an increase compared to the control group. The MWL values of the MCQ-impregnated samples were lower than those of the samples impregnated with ACQ, whilst the MWL values of the BA-impregnated samples were higher than those of the samples impregnated with NB.
  • Küçük Resim Yok
    Öğe
    Durability Ratings of Post-treated Wood-based Composites after 14 Years of Field Exposure
    (North Carolina State Univ Dept Wood & Paper Sci, 2024) Tascioglu, Cihat; Yoshimura, Tsuyoshi; Ohmura, Wakako
    Several commercial wood -based composites (softwood plywood [SWP], hardwood plywood [HWP], medium -density fiberboard [MDF], oriented strand board [OSB], and particleboard) [PB]) were post -treated with alkaline copper quat and copper azole at two different retention levels. The treated specimens were installed on concrete blocks covered with 5 -sided PVC boxes simulating the crawl space conditions (protected aboveground) in Japanese houses in Southern Japan where decay and termite activity are high. The experimental variables are a comparison of treated versus untreated, preservative type and retention levels. During 14 years of exposure, the specimens were biannually visually rated. In general, termite damage became visible earlier and the harshness of attack was higher when compared to decay damage. The untreated and treated MDFs were the most resistant under the protected above ground conditions at the end of 14 years exposure. Particleboard durability performance followed the MDF rating during the same period. The untreated OSB, HWP, and SWP were the least resistant composite types. The treatments substantially increased the durability of the mentioned composite types by 317.6%, 80.5%, and 133% higher termite grading when correlated to their untreated controls, respectfully, yet they failed to maintain full protection. Based on statistical analysis, preservative types and retention levels did not significantly affect decay and termite ratings.
  • Küçük Resim Yok
    Öğe
    Effect of Cryogenic Process on Trametes versicolor and Fomitopsis palustris Fungal Destruction in ThermoWood® Products of Some Wood Species
    (North Carolina State Univ Dept Wood & Paper Sci, 2025) Aytin, Ayhan; Tascioglu, Cihat; Uygur, Ilyas; Ohmura, Wakako
    Aspen, ash, spruce, and fir trees naturally grown in Turkey were obtained directly from the forest and processed using ThermoWood (R)(TM) processing at two different temperatures (190 degrees C: TW1 and at 212 degrees C: TW2). Then, cryogenic treatment (Cr) was applied to the samples, and they were placed in a jar containing Trametes versicolor (COV) and Fomitopsis palustris (TYP) mushrooms. Their weight loss (WL) was measured after 12 weeks. Although WL results varied depending on the tree type and the applied processes, it has been understood that Cr application can be effective in reducing WL. According to the study, the lowest WL was determined to be in COV fungus with 1.2% in cryogenically treated fir tree TW2 samples. The highest WL was in TYP mushrooms with 56.1% in spruce TW1 samples that received heat treatment (HT). The results obtained from the study show that cryogenic treatment may be an alternative method for reducing WL in heat treated wood species.
  • Küçük Resim
    Öğe
    Mold and Larvae Resistance of Wood-Based Composites Incorporating Sodium Fluoride
    (North Carolina State Univ Dept Wood & Paper Sci, 2020) Tascioglu, Cihat; Umemura, Kenji; Kusuma, Sukma; Kose, Coskun; Yalcin, Mesut; Akcay, Caglar; Yoshimura, Tsuyoshi
    The efficacy of particleboards manufactured with sodium fluoride against mold fungi and Hylotrupes bajulus (L.) larvae was tested. Laboratory-size particleboards were manufactured from untreated wood particles with inclusion of fine sodium fluoride (NaF) at the 1, 1.5, and 3% levels relative to total particle weight. Sodium fluoride was introduced as powder during the manufacturing process just before blending resin with wood particles. The laboratory mold test indicated that even the lowest level of retention of NaF with or without leaching significantly reduced mold growth on particleboard surfaces when compared to the untreated control specimens. The increased retention of NaF from 1% to 3% further suppressed mold growth towards lowest levels even on leached specimens. The laboratory Hylotrupes bajulus larvae tests revealed that the particleboard environment with or without NaF is not appropriate for larvacidial activity. While the tested biocide, NaF, tested positive against mold growth on particleboard surfaces, no effect was determined relative to larval deaths.
  • Küçük Resim Yok
    Öğe
    Numerical and Statistical Investigation of The Effect of Composite Layer Thickness on Low-Velocity Impact Behaviour in Fibre Metal Laminate Materials
    (Gazi Univ, 2025) Dundar, Mustafa; Uygur, Ilyas; Ekici, Ergun; Tascioglu, Cihat; Gulenc, Behcet
    In the field of aviation, reducing fuel costs by designing lighter vehicles and thus producing more environmentally friendly aircraft is one of the most important issues. This situation has led aircraft manufacturers to search for lighter and more durable materials. For this reason, Fibre Metal Laminate (FML) structures, which are used especially in the aerospace industry due to their superior fatigue and impact resistance properties, attract attention. Carbon fibre reinforced aluminium plates (CARALL), the most unique member of the FML hybrid structure family, has attracted the attention of researchers. In this study, the low-velocity impact behaviour of CARALL FML structures with different composite layer thicknesses at different energy loading (8J-12J-18J) and different impactor types (& Oslash;15 and & Oslash;20) were statistically investigated. CARALL FML structures were modelled in 2/1 arrangement (Al-0 degrees[1]-Al, Al-0 degrees[3]-Al, Al-0 degrees[5]-Al) in LS-DYNA finite element programme. It is observed that the peak load Fmax increases with increasing energy loading. The increase in striker diameter decreased the amount of absorbed energy and increased the rebound.