Yazarlar
- Duran, Celal(26)
- Ozdes, Duygu(21)
- Baltaci, Cemalettin(10)
- Gundogdu, Ali(10)
- Gül, Abdulkadir(9)
- Çullu, Mustafa(8)
- Aksüt, Yavuz Selim(7)
- Baltacı, Cemalettin(7)
- Barut, Abdulkadir(7)
- Bozbeyoglu, Pinar(7)
- Erol, Ismail(7)
- Ozeken, Sengul Tugba(7)
- Peker, Iskender(7)
- Eker, Hasan(6)
- Külekçi, Gökhan(6)
- Altuner, Elif Esra(5)
- Ar, Ilker Murat(5)
- Güzel, Melih(5)
- Karahan, Selim(5)
- Karpuz, Ömer(5)
- Kıranşan, Murat(5)
- Odabaş, Halil İbrahim(5)
- Seferoğlu, Mehmet Tevfik(5)
- Uysal, Turan(5)
- Demir Şahin, Demet(4)
- Imamoglu, Mustafa(4)
- Karpuz, Omer(4)
- Top, Yener(4)
- Akar, Bülent(3)
- Akpinar, Muhammet Vefa(3)
- Akpınar, Özlem(3)
- Avci, Ibrahim(3)
- Aydoğmuş, Ercan(3)
- Bozbeyoğlu, Pınar(3)
- Cakir, Mehmet Ali(3)
- Camoglu, Aslihan Yilmaz(3)
- Cavusoglu, Ibrahim(3)
- Daulay, Amru(3)
- Ercikdi, Bayram(3)
- Komut, Osman(3)
Yayınlar
- MakaleYalnız künye2020The effect of different fineness values of Afşin Elbistan fly ash on permeability in concrete
Demir Şahin, Demet; Çullu, Mustafa; Eker, Hasan
Too much CO2 is released during cement production. In many researches, the use ofnatural or recycled compounds plays an important role in the cement composition.The use of these components contributes both to reducing the amount of waste andto protecting the environment in nature. It is possible to produce an environmentallyfriendly concrete, thanks to its being a fly ash thermal power plant waste and its useas mineral additive in terms of its composition. In this study, it is aimed to produceimpermeable concretes with the use of C type fly ash as substitutes for cement in concrete composition in substitution rates of 10 %, 30 % and 50 %. In order to reduce thepermeability of concrete in this direction, as a result of grinding the fly ash in the ballmill for 0, 10, 20, 30, 45 and 60 minutes, concrete samples were prepared with andwithout admixture (Reference). Capillarity test was performed to determine the permeability at the end of cure periods of 28 and 90 days on concrete samples. Accordingto the results obtained at the end of 28 days, the best impermeability was achieved inthe mixture with 50 % fly ash replacement and 60 minutes grinding time. In 90 days,the best impermeability was obtained in the mixture with 30 % fly ash replacementand 0 minutes of grinding time. As a result, it was seen that permeability decreasedwith increasing thinness and substitution rate of fly ash in concrete composition.
- MakaleAçık Erişim2020Yüksek Fırın Cürufu İkamesinin Çimentolu Macun Dolgunun Dayanım Özelliklerine Etkisi
Eker, Hasan; Bascetin, Atac; Tuylu, Serkan; Adiguzel, Deniz
Yeraltı madenciliğinde atık depolama yöntemlerden biri olan çimentolu macun dolguda (ÇMD) üretim içingerekli olan dayanımın yakalanması ve daha da geliştirilmesi bu çalışmanın amacını oluşturmaktadır. Bukapsamda yüksek fırın cürufu (YFC) kullanılmış, kısa ve uzun vadede ÇMD dayanım özellikleri üzerindekietkisi araştırılmıştır. ÇMD numuneleri önce, % 3, 5, 7, 9 ve 11 portland çimentosu ile hazırlanmış, daha sonraise YFC ikamesi olarak çimentonun yerine ağırlıkça % 25, % 50 ve % 75’i ile karıştırılarak numuneleroluşturulmuştur. 3, 7, 14, 28, 56 ve 90 günlük kür sürelerine göre tek eksenli basınç dayanımı (TEBD) deneyiyapılmıştır. Deney sonuçlarına göre, yalnızca % 3 çimento (Ç) oranındaki % 75 YFC ikameli karışımlar macundolgu için gerekli olan sıvılaşma riski sınırının (0,15 MPa) altında kalmış, 28 günlük kür süresinde arakatlıkazı için istenilen dayanım sınır değeri (≥ 0.7 MPa) % 7 Ç’nin % 25 YFC, % 9 Ç’nin % 25 ve % 50 YFC, %11 Ç’nun % 25 ve %50 YFC oranlarındaki karışımlar sağlamaktadır. Ancak tahkimat amaçlı olarak YFCkatkılı ÇMD kullanılmaması ya da bu konuda dayanımı geliştirebilmek için daha farklı katkı malzemelerininde kullanılmasının gerekliliği belirlenmiştir.
- MakaleAçık Erişim2020Evaluation of Paper Mill Treatment Water Sludge in Container Box Cardboard Production with Other Waste Papers
Karahan, Selim; Karademir, Arif
Today, the increase of industry rapidly, water pollution was caused Especially, the pollution of nature with random industrial wastewater were affected all living and non-living organism. For the sollution of this problem, after treatment wastewater were purified by industrial mills used intensive water. The paper mills are also the one of the industries which use the water intensive. In these mills consisted of waste sludge. This sludge is left to nature with backwashing water. It is thought that it contributes to the national economy by evaluating the sludge in the waste way. In this way, waste sludge also by entering recycle will have transformed again a helpful case for both people and nature. In this study, waste sludge obtained from Kahramanmaraş Paper Mill (KMK), which processes wastepaper, was used. After various processes, clay, calcium carbonate, starch, resin etc. Were added to this slurry to produce the material. Then, press was applied to these materials. Then these materials were dried. Finally, laboratory tests were performed for all produced materials. As a result of the tests carried out with the waste sludge added to the wastepaper mixture in the specified ratios; breakage index value and burst index value of 5% of waste sludge participation max. has reached the value. On the other hand, cobb and air permeability values decreased while ash value increased.
- MakaleAçık Erişim2020Investigation of Recycling Possibilities of Stacked Waste Office Paper for at Least Five Years
Karahan, Selim
In this study, investigates recycling possibilities of office paper in archive form (stored for at least 5 years). These papers are mostly made by burning. This is to destroy tons of paper raw materials. These papers may be presented with a simple pulping or recycling with small fractionation. This will contribute greatly to the country's economy. The study will also look at the physical and optical properties of these papers. These papers are likely to lose fiber resistance and brightness due to the physical conditions (humidity, temperature) and the mushrooms and insects. In addition, loss of the shine and resistance of the fibers will come to the fore when the ink is removed from these papers. How much of these losses are in the study will be investigated. This will be done in conjunction with a number of applications to compensate for losses. With these operations, tons of waste paper raw materials will be obtained and new waste white office paper will be produced with the desired quality.
- MakaleAçık Erişim2020Çimentolu Macun Dolgu Yönteminin Uygulanmasında Bazı Katkı Malzemelerinin Puzolanik Özelliklerinin Araştırılması
Eker, Hasan; Bascetin, Atac; Tuylu, Serkan; Adiguzel, Deniz
Son zamanlarda geliştirilen ve yaygın bir şekilde kullanılan çimentolu macun dolgu (ÇMD) yöntemi; maden atıklarınınbertarafı konusunda sektöre hem işletme hem çevresel, hem de yasal mevzuatın uygulanması açısından birçok faydalarsağlamaktadır. Bu yüzden; ülkemizdeki bazı maden işletmelerinde son yıllarda çimentolu macun dolgu (ÇMD) yöntemitercih edilmeye başlanmıştır. Bu yöntemin en büyük maliyet kalemlerinden biri bağlayıcı giderleridir. Bu çalışmada;ÇMD’da kullanılan Portland çimento (PÇ) yerine zeolit (Z), yüksek fırın cürufu (YFC), uçucu kül (UK) ve silis dumanı(SD) gibi puzolanik katkı malzemelerinin kullanılabilirliği incelenmiştir. Bu çalışmada referans (R, sadece çimentoiçeren) ve Z, YFC, UK ve SD katkılı ÇMD karışımlarının 28 ve 90 gün kür süreleri sonunda tek eksenli basınçdayanımları ve eğilme dayanımları incelenmiş ve elde edilen tek eksenli basınç ve eğilme dayanımları değerlerikullanılarak puzolanik aktivite indeksi değerleri belirlenmiştir. Atık, çimento (ağırlıkça % 11) ve su ile oluşturulanreferans numuneleri ve çimentonun yerine (% 11) % 25 oranında YFC, % 20 Z, % 10 UK, % 5 SD ikameli ÇMDnumunelerinin 28 ve 90 günlük kür süreleri sonunda tek eksenli basınç dayanımı (TEBD) deneyleri gerçekleştirilmiştir.Elde Edilen sonuçlara göre; 28 ve 90 gündeki en yüksek basınç ve eğilme dayanımları UK numunelerinde eldeedilmiştir. Puzolanik aktivite indeksinin en yüksek değerinin 28 ve 90 günde UK numunelerinde elde edildiğigörülmüştür. Referans numunesinin TEBD değerini 28 gün sonunda UK, SD ve Z geçerken; 90 günde ise sadece SD’ıgeçmektedir.
- MakaleAçık Erişim2020Evaluation of Engineering Properties of Rock Masses in Waste Dam Site: The Example of Gumushane
Kanık, Mustafa; Alemdag, Selcuk
In this study, excavatability, bearing capacity and permeability characteristics of rock masses along the Gümüştaş Waste Storage Dam II site were evaluated. For the excavations to be carried out to increase the volume of the waste storage area, the excavation classes of the rock masses were determined as “Hammer” for andesitic breccia and “Hammer&Blasting” for andesite. The bearing capacity of andesite (bedrock) has been determined with the help of empirical equations and, allowable bearing capacity and ultimate bearing capacity were calculated as 10.44MPa and 31.07MPa, respectively. The permeability has been assessed by the Lugeon Tests conducted in the geotechnical drill holes located in the andesite and andesitic breccia rock masses and with the aid of the seepage analysis based on the finite element method the bedrock mass has been defined as low permeable. Low permeable rock masses would possibly cause the chemical wastes to be collected in the waste dam reservoir area to pollute the groundwater. To prevent the seepage, impermeable natural clay material of 35-40cm thickness should be laid and compressed along the dam axis and reservoir area. This suggestion was modeled with the aid of the finite element method, for the case that the reservoir area was completely filled with wastewater and, the permeability value was determined as 5x10-11m/s as a result of the seepage analysis. In addition, seepage values in the discharge section at a depth of 10m from the foundation vary between 1.69x10-17m3 /s and 3.44x10-16m3 /s. These values are quite low but, are indicators of a possible seepage. To eliminate this possible seepage, the geotextile materials (geosynthetic clay membrane, Geomembrane, and drainage geocomposite) should be laid over the compressed natural clay layer, and thus mixing of the chemical wastewater, which collected after flotation, into the groundwater will be prevented.
- MakaleAçık Erişim2020İçme suyu arıtma tesisi atık çamuru üzerinemetilen mavisi adsorpsiyonu ve yapay sinir ağlarıile modellenmesi
Öztürk, Nurcan; Senturk, Hasan Basri; Gundogdu, Ali; Duran, Celal
Bu çalışmada içme suyu arıtma tesislerinde arıtım aşamaları sonucu oluşan İçme Suyu Arıtma Tesisi Atık Çamurunun (İSATAÇ), atık sularda organik kökenli bir kirletici (boyar madde) olan Metilen Mavisinin uzaklaştırılmasında adsorban olarak kullanılabilirliği araştırılmıştır. Adsorpsiyon çalışmalarında kullanılan İSATAÇ fiziksel ya da kimyasal ön işleme tabi tutulmamıştır. Öncelikle İSATAÇ’ın nem, yoğunluk, uçucu madde, sabit karbon, kül tayini yanı sıra elementel, SEM, FT-IR, XRD, XRF ve TGA/DTA analiz gibi çeşitli analitik işlemlerle karakterize edilmiştir. Sonrasında adsorpsiyon deneyleri kesikli sistemle gerçekleştirilmiş ve İSATAÇ’ın sulu çözeltiden bu kirletici türü uzaklaştırma potansiyeli denge, kinetik ve termodinamik parametreler açısından incelenmiştir. Metilen mavisinin uzaklaştırılmasında Langmuir izoterm modelinden elde edilen maksimum adsorplama kapasitesi 62,50 mg g-1 olarak tespit edilmiştir. Bazı deneysel parametrelerin İSATAÇ üzerinde Metilen Mavisi adsorpsiyonuna etkileri göz önüne alınarak Yapay Sinir Ağı (YSA) modeli geliştirilmiş ve İSATAÇ’ın atık sulardan organik kirleticilerin uzaklaştırılmasında kullanılabileceği sonucuna varılmıştır.
- MakaleAçık Erişim2020Flotasyon Tesis Atıklarının Asit Üretme Potansiyeli ve Kirliliğin Önlenmesi, Gümüşhane, KD Türkiye
Alemdag, Selcuk; Akaryali, Enver; Gücer, Mehmet Ali
Madencilik faaliyetlerindeki çevre kirliliğinin birincil kaynağını, çoğunlukla metalik, kömür ve asfaltit madenlerinde meydana gelen asit drenajı oluşturmaktadır. Bu çalışmada, Pb-Zn cevherleşmesinin flotasyon tesisi atıklarının asit üretme potansiyelleri jeokimyasalanalizler, kısa-dönem temas sızıntı testleri ve Asit-Baz Muhasebesi (ABM) işlemlerini kapsayan statik testlerle incelenmiştir. İşlenen cevherin mineral parajenezini başlıca pirit, kalkopirit, sfalerit ve galen mineralleri oluşturmaktadır. Cevherli atık örneklerinin iz element konsantrasyonlarında, özellikle S, Zn, Cu, As, Sb, Cd, Hg, Ag ve Bi gibi potansiyel toksik metallerdeki yüksek zenginleşme cevherin türü ile doğrudan ilişkili olup, yeraltı suyunu kirletme potansiyeline sahiptir. Kısa-dönem temas sızıntı testlerine göre, örneklerin pH değerleri (9.55-10.60, n= 10), kıta içi su kaynaklarının kalite sınıflandırmasına göre, dördüncü-sınıf (IV) kalite sularını işaret etmektedir. Bununla birlikte, sülfit-sülfür (%S2: 2.92-3.98, n= 10), Net Nötralizasyon Potansiyeli (NNP; 32 kg CaCO3/t 149 kg CaCO3/t, n= 10) ve Nötralizasyon Potansiyel Oranı (NPO; 0.20-0.80, n= 10) değerleri cevherli atık malzemenin potansiyel asit üreticisi olduğunu göstermektedir. Baraj eksen yeri ve rezervuar alanında açılan sondaj kuyularında kaya kütle geçirimliliğini değerlendirmek için lugeon deneyleri yapılmış ve geçirgen özellikte (K= 2x10-6 m/s) olduğu belirlenmiştir.
- MakaleAçık Erişim2020Plent-miks temel tabakası yapımında kazınmış asfalt kaplama (RAP) malzemesi kullanımı ve ekonomik analizi
Seferoglu, Aysegul Gunes; Seferoglu, Mehmet Tevfik; Akpınar, Muhammet; Çelik, Muhammet
Bu çalışmanın amacı, Karayolu Teknik Şartnamesi (KTŞ) kriterlerine göre tasarımı yapılacak olan bir plent-miks temel (PMT)tabakası için kullanılabilir kazınmış asfalt kaplama (RAP) malzemesi oranlarına bağlı olarak elde edilecek mali faydalarınbelirlenmesidir. Tüm RAP katkılı karışımların fayda-maliyet analizleri yapılarak PMT tabakası yapımı ve malzemelerin nakliyeharcamaları göz önüne alındığında, RAP malzemesinin hangi uzaklıktan getirilmesi durumunda ekonomik bir uygulama olacağıaraştırılmıştır. Çalışma neticesinde RAP malzemesinin %100 oranında PMT tabakalarında kullanımının çimento takviyesi ilemümkün olduğu ve doğal agrega (DA) yerine kullanılması durumunda %16’nın üzerinde kâr sağladığı belirlenmiştir. RAPmalzemesinin, PMT Tip-1 tabakası için doğal agregaya alternatif ve maliyet açısından daha ekonomik bir malzeme olduğusonucuna varılmıştır.
- MakaleAçık Erişim2020Siyah üzüm çekirdeği tozunun yoğurtların bazı fizikokimyasal, mikrobiyolojik ve duyusal özellikleri üzerine etkisi
Kalyas, Alperen; Ürkek, Bayram
Bu çalışmada, %0 kontrol numunesi ve farklıoranlarda (0, %0.5 ve %1) siyah üzüm çekirdeği tozu(ÜÇT) ilave edilen yoğurtların bazı kalite özellikleriincelenmiştir. pH değerleri depolama süresine bağlıolarak düşerken, asitlik değerleri ÜÇT ilavesiyleyükselmiştir. Tüm örneklerin serum ayrılmasıdeğerleri depolamanın sonunda düşmüştür. %1 ÜÇTiçeren örnek örneğin en yüksek viskozite (50 ve 100rpm) ve kıvam katsayısı değerlerine sahip olduğugözlenmiştir. L*, b*, C* ve beyaz indeksi değerleriÜÇT ilavesiyle düşmüş, sadece a* değerleriyükselmiştir. %0.5 ve %1 ÜÇT içeren yoğurtörneklerinin tüm duyusal özellikler bakımındankontrol örneğinden daha düşük puanlara sahipolduğu bulunmuştur. Sonuç olarak, ÜÇT doğal birrenklendirici kaynağı olarak, yoğurtların reolojikdeğerlerini ve viskozitesini düzeltmek içinkullanılabilir. Yoğurt örneklerinin duyusalözelliklerini, ÜÇT ilavesi olumsuz etkilediğinden,yoğurda %0.5 den daha düşük konsantrasyonlardaÜÇT ilavesi denenmelidir
- MakaleAçık Erişim2020Adsorption Of Methylene Blue from Aqueous Solution with Sulfuric Acid Activated Corn Cobs: Equilibrium, Kinetics, and Thermodynamics Assessment
Baltaci, Cemalettin; Gundogdu, Ali; Duran, Celal; Bozbeyoglu, Pinar
Three adsorbents with different characteristics were produced in this study by activation of sulfuric acid with different concentrations, from corn (Zea mays L.) cobs, which is an agricultural waste by-product resulting from harvesting. After characterization by the parameters such as Boehm titration, determination of pH-pHpzc, and methylene blue – iodine number, and IR analysis, their methylene blue adsorption potentials from aqueous medium were investigated based on equilibrium, kinetics, and thermodynamics evaluations. This study aims to examine the effects of relatively dilute and concentrated acids on the activation process and to gain an economic value to waste materials through the production of a new adsorbent. It was observed that the initial solution pH did not have a significant effect on the adsorption efficiency. The adsorption process reached the equilibrium at the end of the first 120 minutes, and the kinetic data fit the pseudo-second-order kinetic model. Langmuir adsorption capacity (295.5 mg/g) of the adsorbent produced by activating with 50% sulfuric acid was found higher than those produced with 75% and 98% acids. An increase in ambient temperature effected the adsorption positively. As a result, in this study, very low-cost adsorbents were produced from the waste by-product corn cobs, and a new approach was proposed for cleaning wastewater containing dyestuffs.
- MakaleAçık Erişim2020Blue stain in lumber industry and losses caused by cutting methods
Komut, Osman
In this study, it is aimed to determine the waste and productivity losses of Scots pine (Pinus sylvestris L.) logs that were exposed to blue stain degradation. In this context, a total of 39 timber production processes were analyzed in 7 different lumber managements using prism cutting and sharp cutting method. The main product yield and additional processing requirements were determined for flawed and flawless logs in blue stain damage. As a result of the study, it was determined that the blue stain degradation decreased the main product efficiency by 17% in the prism cutting method and by 33% in the sharp cutting method. Statistically significant differences were discovered between the efficiency values obtained as a consequence of cutting flawed and flawless logs with prism and sharp cutting methods. In addition, additional processing requirements were determined in the sharp mowing method.
- MakaleYalnız künye2020Preparation and characterization of bacterial cellulose produced from fruit and vegetable peels by Komagataeibacter hansenii GA2016
Güzel, Melih; Akpınar, Özlem
This study focused on the investigation of bacterial cellulose production potency of some fruit and vegetable peels (cucumber, melon, kiwifruit, tomato, apple, quince and pomegranate) with Komagataeibacter hansenii GA2016. Fruit and vegetable peels were hydrolyzed, used for bacterial cellulose (BC) production and their chemical, physical, thermal and structural features were compared to BC from Hestrin–Schramm medium (HSBC) and plant cellulose (CP). Except for pomegranate peel hydrolysate, all the fruit and vegetable peel hydrolysates supplied to K. hansenii GA2016 supported the BC production. Among the fruit and vegetable peel hydrolysates, the highest BC production was observed in kiwifruit peel hydrolysate (11.53%), while the lowest production was observed in apple peel hydrolysate (1.54%). Water-holding capacities of the BCs were ranged from 627.50% to 928.79% and higher than HSBC (609.30%), average fiber diameters were ranged from 47.64 nm to 61.11 nm and thinner than HSBC (74.29) and CP (10,420 nm), crystallinities were ranged from 80.27% to 92.96%, thermal capacities BCs were higher than HSBC and CP. For the BC productions, utilization of the fruit and vegetable peels as the sole nutrient source could reduce the production costs and among the polysaccharides, increase the use of BC in industry.
- MakaleYalnız künye2020Evaluating the feasibility of blockchain in logistics operations: A decision framework
Ar, Ilker Murat; Erol, Ismail; Peker, Iskender; Ozdemir, Ali Ihsan; Medeni, Tunc Durmus; Medeni, Ihsan Tolga
The main purpose of this study is to investigate the feasibility of blockchain technology in logistics industry using a quantitative approach. To this end, a decision framework is proposed based on a multi-criteria decision structure that incorporates AHP into VIKOR under Intuitionistic Fuzzy Theory. This integration presents different solutions and rankings based on different decision-making strategies and also captures uncertainty in the evaluation process. While Intuitionistic Fuzzy AHP calculates the importance weights of the proposed criteria indicated as scalability, privacy, interoperability, audit, latency, visibility, trust, and security, Fuzzy VIKOR ranks the logistics operations demonstrated as materials handling, warehousing, order processing, transportation, packaging, fleet management, labeling, vehicle routing and product returns management. The proposed decision framework was applied in a large-scale logistics company located in Turkey. The findings of this study suggest that while the most important criteria are security, visibility and audit, the most feasible logistics operations proved to be transportation, materials handling, warehousing, order processing and fleet management in a possible blockchain implementation. The decision framework in this study may enable decision makers to evaluate the feasibility of blockchain in logistics operations, which is one of the main research gaps in the current blockchain research. Furthermore, this is the first study that integrates AHP and VIKOR methods under Intuitionistic Fuzzy Theory in the context of blockchain.
- MakaleYalnız künye2020Bottleneck identification and ranking model for mine operations
Kahraman, M. Mustafa; Rogers, W. Pratt; Dessureault, Sean
Mining has a long history of production and operations management. Considering the increasing complexity of reserves, declining metal grades, and worldwide price volatilities, mines have to operate more efficiently than ever. In recent years, companies have been adopting innovative solutions and technologies to reduce costs and remain competitive in the global market. Specifically, management of bottlenecks has been in the focus of the manufacturing industry for decades now. The mining industry has made significant advancements in process improvement tools using equipment, human, and asset tracking capabilities. However, to date, there is no holistic approach or system to identify and manage the bottleneck in the entire value chain of mining. This research proposes a new method to identify and rank the bottlenecks in a mine value chain. The method is applied in a coal mine and the results are presented in the case study.
- MakaleAçık Erişim2019Odun dışı orman ürünlerine ilişkin paydaş farkındalığı: Orman köylüsü örneği
Komut, Osman
Son yıllarda Dünya genelinde odun dışı orman ürünlerine yönelik artan ilgi ve talep, bu kaynaklarınetkin ve verimli kullanımıyla birlikte sürdürülebilirliğinin sağlanmasını zorunlu kılmıştır. Bu çalışma,odun dışı orman ürünleri kaynaklarının ve faydalanmanın sürdürülebilirliğinin sağlanmasında enönemli paydaşlar arasında yer alan orman köylülerinin konuya ilişkin farkındalık düzeyinindeğerlendirmesini amaç edinmiştir. Bu bağlamda, Elazığ Orman Bölge Müdürlüğü sorumluluk alanındayer alan toplam 144 orman köylüsüne yüz yüze görüşme tekniğine dayalı anket uygulaması yapılmıştır.Çalışma sonucunda, orman köylülerinin odun dışı orman ürünlerine ilişkin görüşleri arasında mesleği,orman kaynaklarından faydalanma durumu ve bu ürünleri kullanmaya başlama nedenlerideğişkenlerine göre istatistiksel düzeyde anlamlı farklılıklar bulunduğu (p<0.05) tespit edilmiştir. Diğeryandan, odun dışı orman ürünleri kullanım nedeninin genel itibariyle eskiden gelen deneyimler olduğuve katılımcıların büyük çoğunluğunun bu ürünlerden herhangi bir şekilde gelir elde etmediğianlaşılmıştır. Aynı zamanda çalışma sonuçları, söz konusu ürünlerin üretim ve kontrolünün devletdenetiminde olması gerektiği kanısının katılımcılar arasında yaygın bir görüş olduğunu ortayakoymuştur.
- MakaleAçık Erişim2019Factors affectıng consumer attıtude ın organıc products and the types of purchasıng: sample of gümüşhane provınce
Avcı, İbrahim; Yildiz, Salih
The aim of this study is to examine the effects of perceived quality, perceived value, extrinsic attributes, past experience and lifestyles on attitude towards organic products and determine whether attitude towards organic products has effect on actual buying behaviour and repurchase intention. The survey form which was formed within the framework of the research was applied face to face to 420 consumers living in Gümüşhane province between 24 December 2018 and 7 January 2019. 408 questionnaires were included in the analysis after the elimination of 12 incomplete and incorrectly completed questionnaires. The data were analyzed by SPSS 21 and AMOS 24. As a result of analysis it was found that while lifestyle and extrinsic attributes have no significant effect on attitude towards organic products, perceived quality, perceived value and past experience have significant and positive effect.
- Derleme MakaleAçık Erişim2019Organic Agriculture Potential of Eastern Black Sea Region
Okcu, Melih; Karabulut, Besim
Mankind caused a lot of harm to their environment unintentionally during agriculture. Thus nowadays production techniques that are compatible with nature, making the right use of the resources, targeting sustainable development, looking after animal welfare are beginning to spread throughout the world. Especially organic agriculture among those techniques gained a seat as it depends on customer preference. Organic agriculture that has the following five fundamental features: compatibility to nature, self sufficiency, sustainability, welfare, traceability began with the production of dried grape, dried figs, dried apricots and nuts in our country during the 1980s with the contractual agriculture system intending to export. During the following years, hardshell and dried fruits, frozen fruits and vegetables, fresh fruits and vegetables, spices and legumes followed the previous ones in export. Also, production and exportation of rose water, rose oil, olive oil, cotton and textile products increased considerably. In our country where there is a wide variety of products for organic agriculture, in eastern black sea region tea and nuts are the most cultivated products. Organic agriculture is carried out in every province of the region, the contribution of provinces in percentage as follows: Rize 42%, Ordu 25%, Artvin 13%, Trabzon 10%, Gumushane and Giresun 5%. Organic stock raising is done only in Gumushane and Ordu. Gumushane has the most promising potential for organic stock raising.
- MakaleYalnız künye2019Characterisation of yoghurt enriched with polyunsaturated fatty acids by using walnut slurry
İlyasoğlu, Huri; Yilmaz, Fırat
This study aimed to evaluate the physicochemical, chemical, rheological, sensorial and microbiological properties of yoghurt enriched with polyunsaturated fatty acids (PUFAs). The PUFA-enriched yoghurt was prepared with walnut slurry (10%−50%) and skimmed milk (50%−90%). Compared with the control yoghurt, it contained a lower content of protein, potassium, sodium and phosphorus, and a higher content of fat, iron, magnesium and zinc. Moreover, it exhibited a lower syneresis value and a higher water-holding capacity value. Its fat was rich in omega fatty acids, mainly linoleic and linolenic acids. These research findings revealed that walnut slurry could be used in yoghurt manufacture to develop fermented milk products as functional foods, especially when enriched with omega fatty acids.
- MakaleYalnız künye2019A novel endo-β-1,4-xylanase from Pediococcus acidilactici GC25; purification, characterization and application in clarification of fruit juices
Adiguzel, Gulsah; Faiz, Ozlem; Sisecioglu, Melda; Sari, Bilge; Baltaci, Ozkan; Akbulut, Sumeyya; Genc, Berna; Adiguzel, Ahmet
A novel extracellular xylanase was purified and characterized from Pediococcus acidilactici GC25 (GenBank number: MF289522). The purification was 4.6-fold with a yield of 43.61% through acetone precipitation, Q-Sepharose, and CM-Sepharose ion change chromatography. The molecular weight of the enzyme was 48.15 kDa, and the optimum pH and temperature were 7.0 and 40 °C, respectively. The maximum activity was observed between 20 and 50 °C. Although it was active within a wide pH range (pH 2.0–9.0), it retained over 85% of its activity after 24 h incubation; and over 70% of its activity after 168 h incubation in neutral and alkaline pH. It was observed that the enzyme showed high stability with K+, Ba2+, Cd2+, Co2+, Sr2+, Mg2+, Ca2+, Al3+, Zn2+, and Ni2+ ions. The Km and Vmax for the xylanase were 3.10 mg mL−1 and 4.66 U/mg protein, respectively. It was determined that treatment of different fruit juices with P. acidilactici GC25 xylanase improved the clarification. The highest increase in the reducing sugar amount and decrease in the turbidity was 24.47 ± 1.08 and 21.22 ± 0.58 for peach juice at 0.15 U/mL enzyme concentration. These results showed that the xylanase purified from P. acidilactici GC25 may have a wide potential in biotechnological processes of the food and baking industry.
