A New Problem of Adolescents: "Bonsai"

Synthetic cannabinoids have been increasingly used by adolescents in the recent years. In our country, synthetic cannabinoids are known as "bonsai". They may cause neuropsychiatric effects such as psychosis, agitation, ataxia, convulsion, hallucinations, and may also cause cardiovascular symptoms such as tachycardia, systolic hypertension, postural hypotension and chest pain. In this article, three adolescent males are reported, who were admitted to the emergency department with severe chest pain and significantly higher cardiac enzymes, and who claimed to have used "bonsai"

Exploring the potential of nanotechnology for sustainable wood preservation

Wood preservation plays a vital role in maintaining wood products' structural and aesthetic properties. Traditional methods, including chemical treatments, preservatives, and coatings, have been utilized for wood protection, but sustainable alternatives are sought due to their negative environmental and health impacts. The utilization of nanomaterials presents a promising avenue for wood protection. In this study, nanoparticles were applied to lignocellulosic materials using the impregnation method to enhance solid wood’s water and fire resistance without needing additional energy. This research aimed to identify a cost-effective and energy-efficient approach for large-scale wood production while introducing innovative and competitive materials in the wood industry. Surface modification and characterization analyses, including SEM-EDX and Optical Profilometer studies, TGA-DTA analysis for thermal strength assessment, % water uptake test for water resistance evaluation, and PCE-CSM 10 spectrophotometer measurements to determine color change parameters, were conducted. Functionalized wood surfaces treated with zinc oxide (ZnO), chitosan (Ch), and tin dioxide (SnO2) nanoparticles exhibited water uptake values of 64%, 71%, and 73%, respectively. Following the salinization process using TEOS, the water uptake values decreased to 58%, 59%, and 60% for the respective surfaces. Based on the TGA and DTA results, the W-ZnO-TEOS sample demonstrated superior mass protection, with a significant weight loss of 62.1% (5.717 mg) at 340-375°C and 14.4% (1.328 mg) at 381-439°C. This was followed by the W-SnO2-TEOS sample, which exhibited a weight loss of 46.3% (7.050 mg) at 301-353°C and 15.4% (2.345 mg) at 431-469°C. The W-Ch-TEOS sample displayed a weight loss of 66.4% (8.242 mg) at 342-365°C and 18.8% (2.335 mg) at 448-476°C. Overall, the W-SnO2-TEOS sample demonstrated the highest water resistance, while the W-ZnO-TEOS sample exhibited the most effective fire protection capabilities

Brzina dugotrajnoga higroskopskog debljinskog bubrenja kompozita od polipropilena i hidrotermički tretirane bukovine

Long-term hygroscopic thickness swelling rate of polypropylene (PP) composites filled with thermally treated wood flour was investigated. The beech wood chips were heat treated at 120 °C, 150 °C or 180 °C for 30 or 120 min using saturated steam in a digester. The composites based on PP, beech wood flour (BF), and coupling agents (PP-g-MA) were made by melt compounding and injection molding. The weight ratio of BF to PP was controlled at 50/47 for all blends. The amount of coupling agent was fixed at 3 wt.% for all formulations. Further study was conducted to model thickness swelling of the composites, a swelling rate parameter (KSR). The thickness swelling of thermally-treated samples at 120 ºC for 30 min and at 150 ºC for 30 min were lower than that of control samples, followed by thermally-treated samples at 180 ºC for 120 min, at 180 ºC for 30 min, at 120 ºC for 120 min, and at 150 ºC for 120 min, respectively. Furthermore, the thickness swelling of the BF/PP composites decreased with increasing time and temperature of the thermal-treatment. In addition, at 120 ºC for 30 min, the composites showed a lower swelling rate than control samples. The KSR of the composites was influenced both by the time and temperature of thermal treatment.U radu je istražen dugotrajni stupanj higroskopskoga debljinskog bubrenja polipropilenskih (PP) kompozita punjenih toplinski obrađenim drvnim brašnom. Iverje od bukovine bilo je toplinski tretirano na 120, 150 ili 180 °C tijekom 30 ili 120 minuta uz pomoć zasićene pare u digestoru. Kompoziti na bazi PP-a, brašna od bukovine (BF)-a i veziva (PP-g-MA) izrađeni su taljenjem i injekcijskim prešanjem. Maseni je omjer BF/PP za sve smjese bio 50/47. Količina veziva za sve formulacije bila je na 3 wt.%. Nadalje, provedeno je modeliranje debljinskog bubrenja kompozita i parametra brzine bubrenja (KSR). Debljinsko bubrenje uzoraka toplinski tretiranih 30 min na 120 ºC i 30 min na 150 ºC bilo je niže nego na kontrolnim uzorcima, zatim slijede uzorci toplinski tretirani 120 min na 180 ºC, 30 min na 180 ºC, 120 min na 120 ºC, odnosno 120 min na 150 ºC. Nadalje, debljinsko bubrenje BF/PP kompozita smanjivalo se s povećanjem vremena i temperature toplinskog postupka. Osim toga, kompoziti su pri 30 min na 120 ºC pokazali niži parametar brzine bubrenja od kontrolnih uzoraka. Na parametar brzine bubrenja kompozita utjecali su vrijeme toplinskog tretmana i temperatura

Yüksek yoğunluklu lif levhanın ısı iletkenliği ve limit oksijen indeksi üzerine yanmayı geciktiricilerin etkisi

Bu çalışmada, yanmayı geciktirici bazı kimyasal maddeler değişik oranlarda lif ile muamele edilmiş ve yüksek yoğunluklu liflevha (HDF) üretilmiştir. Hammadde olarak %50 kayın ve %50 sarıçam lifleri kullanılmıştır. Liflerin içine tam kuru lif miktarına oranla %3, %6, %9 oranlarında toz halinde boraks, borik asit, amonyum polifosfat ve alfa-x kimyasalları ilave edilerek HDF levhalar elde edilmiştir. Elde edilen yüksek yoğunluklu lif levhanın ısı iletkenliği ve limit oksijen indeksi (LOI) değerleri belirlenmiştir. Yanmayı geciktirici kimyasal maddelerin ısı iletkenliği ve limit oksijen miktarını artırdığı ancak kimyasal madde türü ve konsantrasyon oranına göre farklı etki yaptıkları tespit edilmiştir. Isı iletkenliği için en iyi sonuç %9’ luk borik asit (0.2815 W/moK) ile sağlanırken LOI testi için en iyi sonuçlar %6 ve %9’ luk amonyum polifosfat (%45) için elde edilmiştir. Anahtar Kelimeler: HDF, Boraks, Borik asit, Isı iletkenliği, LO

Sinop İli Balıkçılık Altyapıları

Sinop is one of most important fishing centers of Turkey. Its importance in future of Turkish fisheries will have been continue, because of present fisheries infrastructures, fishing vessels and gears, fishing industry and rooted fisheries traditions. 15 places which consist from fishing ports, shelters and berths, with fishing cooperatives near this places have been visited during the study, and data collected on fishery infrastructures and fishing activities. The study includes detailed plans and sketches for total 15 fishing shelters and also presents data for 10 fishing cooperatives and one fishing cooperative association. Four of the listed fishing shelters are absent in the present official records.Sinop ülkemizin en önemli balıkçılık merkezlerinden birisidir. Sahip olduğu liman ve barınaklar, balıkçı tekneleri, balıkçılık sanayi, binlerce yıla dayanan balıkçılık geleneği ile bu yerini gelecekte de devam ettirecektir. Bu çalışmada liman, barınak ve çekek yerlerinden oluşan 15 altyapı ve yakın çevresinde kurulu bulunan balıkçı kooperatifleri ziyaret edilmiş, balıkçılık alt yapısı ve faaliyetleri hakkında bilgiler toplanmıştır. Çalışmada toplam 15 barınma yerine ait detaylı plan ve krokiler ile 10 kooperatif ve bir kooperatif birliği hakkında bilgilere yer verilmiştir. Barınma yerlerinden 4 adedi resmi kayıtlarda görünmemektedir

Gökiçi(Diyarbakır) sahasının stratigrafisi ve hidrokarbon potansiyeli açısından incelenmesi

TEZ4448Tez (Yüksek Lisans) -- Çukurova Üniversitesi, Adana, 2003.Kaynakça (s. 88-98) var.vi, 98 s. ; rnk. res. , hrt. ; 30 cm.

Effects of Coating with Calcite together with Various Fire Retardants on the Fire Properties of Particleboard

The fire properties of particleboard coated with calcite and a variety of fire-retardants (FR) was investigated. Four different chemicals, boric acid (BA), borax (BX), dolomite (DOL), and melamine (MEL), were added at the concentration of 1.0%, 3.0%, and 5.0% by oven-dry weight of calcite. The particleboard panels were tested according to the ASTM-E 69 standard to investigate their fire-retardant properties. The determination of weight loss, temperature, and the release of O2, CO, and NO by the samples was measured and recorded over 30 s intervals during combustion of the materials. The results indicated that the BA coatings exhibited better thermal stability than the other chemicals. Consequently, the lowest weight loss and temperature was found for specimens treated with 5.0% BA. These chemicals were effective relative to the fire properties of coated particleboard surfaces, depending on the type and ratio of the chemicals to the calcite

Evaluation of Hydrocarbon Potential and Stra

Gökiçi yapısının bulunduğu çalışma alanı, Güneydoğu Anadolu'da XI. Petrol bölgesinde Diyarbakır ?li'nin 50 km kuzeybatısında yer almaktadır. Çalışma alanında açılan kuyuların değerlendirilmesi sonucunda bölgede hidrokarbon potansiyeli taşıyabilecek karakterde olan Bedinan, Dadaş ve Derdere Formasyonları ayrıntılı olarak incelenmiştir. Organik maddece zengin olan Dadaş Formasyonu bu sahanın kaynak kaya özelliği gösteren birimidir. Buna bağlı olarak, Bedinan Formasyonu içerisindeki kumtaşı paketlerinin iyi rezervuar kaya özelliği gösterdiği, uygun yapı sunduğu takdirde de, bu formasyonda petrol bulma olasılığının çok yüksek olduğu anlaşılmıştır. Ayrıca, Derdere Formasyonu'nun tabanında bulunan Sferli seviyeler de kaynak kaya özelliğinde olup, üst seviyelerde gözlenen kriptomikro-mikro kristalen dolomitler de rezervuar kaya özelliği taşımaktadır.The study area including the Gökiçi structure takes place within the XI. Petroleum Region in South East Anatolia to the 50 km northwest of Diyarbakır. After determining the wells drilled in the study area, Bedinan, Dadaş and Derdere Formations which have a hydrocarbon potential were evaluated in detail. After the detail studies, it is seen that the Dadaş formation, which has rich organic material, presents the source rock character for the study area. Depending on this, the sandstone packages within the Bedinan formation indicate good reservoir rock characteristics and if the convenient structure is found within the area, there is a very high possibility to discover oil within this formation. In addition, the spherical levels at the bottom of the Derdere formation have source rock characteristics and the following upper levels that comprising criptomicro-micro crystalline dolomites point out reservoir rock properties