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Utilization of Pulsed Electric Field (PEF) Technique in Meat and Seafood Processing
2020
Berkay Kopuk | Recep Güneş | Harun Uran
In the food industry, using of new preservation and processing technologies, which may be an alternative to traditional methods, is becoming increasingly important. These novel and particularly non-thermal techniques have very important advantages such as enhancing food safety, reducing quality losses, and increasing production efficiency. One of these new technologies, Pulsed electric field (PEF) technique, stands out as a novel method that has been emphasized in recent years. It is used for different purposes in both liquid and solid foods, also various studies are carried out for the optimization. On the other hand, recently, there are several studies using PEF technique in meats and seafoods for the preservation purposes, as well as other positive effects (improving the functional properties of the product, accelerating processes such as drying, curing and freezing). In this regard, detailed information about the purposes for which PEF technique can be used in meats and seafoods has been tried to be given in this comprehensive review study.
Afficher plus [+] Moins [-]Mathematical Modelling of Thin Layer Drying of Alfalfa (Medicago sativa L.) Varieties at Different Temperatures
2020
Muhammed Taşova | Hakan Polatcı | Mahir Özkurt
In this study, the average drying times of the Frigos, Bilensoy, Nimet and Prosementi alfalfa varieties were determined by drying in a convective dryer (50, 60 and 70°C) and in the open (sun). In addition, the most suitable thin layer drying models were determined, which are important in controlling the drying processes and developing new product-specific dryers. In drying processes, the moisture content of the product was dried up to 10% compared to the wet base. The first moisture contents of the specified varieties according to the wet base are respectively; 76.20, 75.88, 76.13 and 75.07%. In drying processes, it was determined that drying method and temperatures changed average drying times. The longest drying times were determined in the Frigos variety, which was laid in the sun and dried. When the Frigos variety was dried in the oven at 50, 60 and 70°C, the average drying times were determined as 11, 10 and 6 hours. Time-dependent moisture ratios were determined, processed in thin layer drying models and the mathematical model that best predicts drying curves was determined. While creating curves, Page, Midilli, Yağcıoğlu models were used. While acceptable reliability values were found as in all models, among the models, the highest stability value (R2) was found by Midilli was found in equality.
Afficher plus [+] Moins [-]Virtual and Augmented Reality Applications in Landscape Design and Project Presentation Techniques
2020
Orhun Soydan | Ahmet Benliay
After realizing that multi-storey buildings are contrary to human nature, the importance of natural landscape and green areas around it has been noticed. For this reason, people want to see how their environment will be in the design phase and the importance of project presentations is increasing day by day. Information technologies for spatial thinking, imagination and modelling have gradually started to be included in landscape design processes. The concept of virtual reality, augmented reality and immersive virtual reality are becoming more and more involved in our lives due to reasons such as the size of the devices getting smaller and their prices being relatively accessible to everyone. As an alternative to traditional presentation techniques and two-dimensional presentation techniques on the computer, making presentations in a virtual reality environment can be a stronger factor in people’s perception of the environment. In the study visual sets in basic, intermediate and advanced level of detail for the same landscape design and project site have been created. Each set consists of hand-drawn perspective image, computer aided perspective image, stereoscopic 360-degree VR image and an augmented reality model. In order to evaluate these visual sets, interviews were made with 10 landscape architects who are experts in the subject. As a result of the study, criteria’s for landscape presentations has been discussed and the advantages and disadvantages of landscape design presentations that will be created using virtual and augmented reality have been evaluated.
Afficher plus [+] Moins [-]Risk Assessment of Pesticidal Toxicity and Threats on Pollinators: A Review on Honey Bee
2020
Kushal Naharki | Sabina Regmi
Pollinators play vital roles to the environment, biodiversity conservation, food security and several dimensions of global sustainable development. Honey bee is an important pollinator globally but has been exposed to increasing threats from diseases, pesticides and biotic stresses. This review paper highlights the role of honey bees as pollinators, addresses threats which influence decline of honey bees and assess pesticidal risk toxicity on non-target organisms. Decline of honey bee population is caused by several factors including habitat fragmentation, pesticidal toxicity, colony collapse disorder and climate change. Pesticidal residue and toxicity has an adverse effect which results in honey bee population decline, disturb foraging and contamination of bee products. Residues of agricultural pesticides like pyrethroid and neonicotinoid pose a serious threat on honey bee health further reducing agricultural production and diversity. Pesticidal risk assessments are carried out to study effects of pesticides on pollinators with an aim to provide measures to safeguard their abundance, diversity and health. Sustainable agriculture, effective policy and proper management can decrease pollinators' risk by helping to diversify the agriculture for pollen and nectars with reduced usage of pesticides and proper management.
Afficher plus [+] Moins [-]Farklı Mikoriza Türleri, Kompost ve Fosfat Kayacı Uygulamalarının Sorgum Bitkisinin Gelişimine Etkileri
2020
Çağdaş Akpınar | Ahmet Demirbaş | İbrahim Ortaş
Bu çalışma, farklı mikoriza türleri aşılaması ile birlikte farklı dozlarda kompost ve fosfat kayacı uygulamalarının sorgum bitkisinin gelişimi ve besin elementleri alımına olan etkilerini belirlemek amacıyla yapılmıştır. Denemede kompost dozları 0, 20, 40 g kompost/kg toprak, fosfat kayacı dozları 0, 2, 4 g fosfat kayacı/kg toprak olarak uygulanmış, mikoriza türleri olarak; Funnelformis mosseae, F. caledonius, Claroideoglomus etunicatum, Rhizophagus clarus, doğal ve kokteyl (karışım) kullanılmıştır. Hasat sonunda kök ve kök üstü aksam kuru madde üretimleri, fosfor (P) ve çinko (Zn) konsantrasyonları ve mikorizal kök infeksiyonu analizleri yapılmıştır. Araştırma bulgularına göre, mikoriza aşılaması sorgum bitkisinin kök ve kök üstü aksam kuru madde üretimine, P, Zn ve kök infeksiyonuna fosfat kayacı ve kompost uygulamalarına göre daha fazla oranda etki etmiştir. En etkili mikoriza türü olarak F. caledonius ön plana çıkmaktadır. Kompost uygulamalarında 20 ve 40 g/kg toprak doz uygulamaları etkin bulunur iken, fosfat kayacında ise yetiştirme süresinin kısalığı nedeniyle fosfat kayacının yeterince çözünemediği kanısına varılmıştır.
Afficher plus [+] Moins [-]A Calibration Study for Sensor-Based In-Season Nitrogen Management of Irrigated Winter Wheat
2020
Erdinc Savaşlı | Oğuz Önder | Ramis Dayıoğlu | Didem Özen | Suat Özdemir | Yaşar Karaduman | Özgür Ateş | Melih Özsayın
This study was conducted at Transitional Zone Agricultural Research Institute in Eskisehir, in 2017-2019 growing seasons. In the study, responses of four winter wheat cultivars (Atay85, Hat 31, Yunus and Nacibey) to nitrogen fertilization under irrigation conditions were compared with vegetation indices based on spectral reflection and In- Season Estimates of Yield calculated from these indices. GreenSeekerTM (NTech Industries, Inc., Ukiah,CA) hand-held sensor was used for this purpose. The experimental layout were used 0, 4, 8, 12, 16 and 20 kg N/da nitrogen rates 2 factor factorial in randomized complete block design in the experiment. Vegetation indices (NDVI) were obtained at growth stages Zadoks2,4, Zadoks3,0, Zadoks3,1 and Zadoks3,2. Zadoks3,0 (stem elongation) was found to be the most realistic reading time. A comparison of the system with traditional farmer applications, based on the average of 3 experiment fields, the new system was shown to give similar yields with 2,8 kg/da less N in the spring (ZD3,0), showing its economically promising value. The sensor application is determined to be 2% more economically effective than farmer application. Economic nitrogen dose respectively Atay85, Hat 31, Yunus and Nacibey was determined as the nitrogen dose 12,6 kgN/da, 14,1 kgN/ da, 14,4 kg N/da and 17,9 kgN/da.
Afficher plus [+] Moins [-]Determination of Roughage Adequacy by Means of Animal Husbandry Status and Feed Sources in the KOP Region
2020
Orhan Ermetin | Mevlüt Mülayim
KOP region covers Aksaray, Karaman, Konya, Niğde Nevşehir, Yozgat, Kırıkkale and Kırşehir provinces. KOP region has an area of 95,580 km² about 12,3%, with 4.515.046 population about 5,4% and 12,3% of agricultural lands of Turkey. KOP Region has 13.1 % grassland and 9,4% of the area of forage crops cultivation and in terms of production forage crops 15,8% of Turkey. KOP region has also 2.150.920 head of cattle (11,8% of the Turkey), and whit 5.431.031 head of small ruminant (%10,9 of the Turkey). 3.032.086 tons of milk is produced in the KOP region (13,2% of the Turkey). It is produced in the KOP region that 11,9% of Turkey's total red meat production. Livestock and forage crops production has an important place in 8 provinces of the KOP region. In this study, the current situation of livestock, pasture and forage crops cultivation in KOP provinces were evaluated and its effects on regional and country development were examined. Since there are 1.608.530 tons of forage deficit in the KOP region, the production of forage should be increased. In order to increase animal production in the region by the KOP Administration, efforts towards expanding modern techniques and improving livestock infrastructure should continue and animal husbandry activities should continue to be supported with new projects.
Afficher plus [+] Moins [-]Landscape Character Analysis in Rural Areas “Sample of Kastamonu Gölköy and Its Surroundings”
2020
Sevgi Öztürk | Özge Vural | Kaan Meydan
The planning and management of landscapes have been reviewed in the European Landscape Convention (ELC) and the need to identify landscape character areas has been emphasized. The determination of Landscape Character Types (LCT) at the local level is of great importance in order to ensure sustainable development in rural areas, correct management of the shelter values and determination of usage strategies. In this study, which aims to evaluate rural settlements with character determination and sustainability approach, the landscape variables of Kastamonu-Gölköy settlement and its immediate surroundings are mapped and analysed with Landscape Character Analysis (LCA) approach. For this purpose, the geology, large soil groups, geomorphology, slope groups, are a usage maps of the area were digitized with Geographic Information Systems software and character types were determined by synthesizing them. As a result of the study, 133 landscape character types were determined. It is thought that the acquired character types will serve as a base in rural planning and landscape management studies carried out at the national and local level and will contribute to the formation of landscape policies.
Afficher plus [+] Moins [-]Genetic Diversity and Some Fruit Characteristics of Quince Genotypes Collected from Kayseri Region
2020
Aydin Uzun | Ayşe Çil | Mehmet Yaman | Ömer Faruk Coşkun
Turkey with diverse ecologies harbours several plant and fruit species. Several species grow naturally are grown commercially. Kayseri and surroundings constitute natural spread zone of some fruit species. This study was conducted to determine genetic diversity and some pomological characteristics of 31 seed-propagated quince (Cydonia oblanga Mill.) genotypes. For pomological characteristics, fruit length, fruit width, water soluble dry matter (WSDM) and total acidity analyses were performed. Molecular analyses were conducted with the aid of 15 SRAP primer combinations. Genetic diversity in investigated genotypes varied between 0.53- 0.92 and genotypes were gathered under two main groups. Primer base lengths varied between 400- 1700 bp. A total of 97 clear bands were obtained and 91 of them were polymorphic (polymorphism ratio = 87.7%). Present findings revealed that existing quince populations of the region should be preserved and be used in further genetic studies.
Afficher plus [+] Moins [-]Romanov Kuzularının Vücut Özelliklerinin Tanımlanmasında Doğrusal ve Doğrusal Olmayan Modellerin Karşılaştırılması
2020
Yalçın Tahtalı | Ahmet Tahsin Yaldızbaş
Bu araştırmada Romanov kuzularının vücut özelliklerinin gelişiminin tanımlanması amacı ile 50 Romanov kuzusunun doğumdan itibaren 180. yaş gününe kadar olan büyüme döneminde her 15 günde bir canlı ağırlık, vücut uzunluğu, cidago yüksekliği özelliklerine ilişkin kayıtlar alınmış ve elde edilen veriler ile doğrusal modellerden Linear, Kuadratik ve Kübik model, doğrusal olmayan modellerden Gompertz ve Lojistik modelleri kullanılarak büyüme eğrilerine ait parametreler hesaplanmıştır. Büyüme eğrileri içinde en iyi uyumu gösteren modelin belirlenmesinde belirtme katsayısı (R2), hata kareler ortalaması (HKO) ve ortalama mutlak sapma (OMS) değerlerinden yararlanılmıştır. Elde edilen sonuçlara göre en yüksek R2 değeri ile en düşük HKO değerleri sırası ile canlı ağırlıkta 0,992-0,591, cidago yüksekliğinde 0,993-0,441, vücut uzunluğunda 0,986-1,164 olarak tespit edilmiştir. Ele alınan bütün vücut özelliklerinde en yüksek R2 değeri kübik modelden elde edilmiştir. Büyüme eğrisi modellerine ait parametrelerin belirlenebilmesi için SPSS istatistik programı kullanılmıştır. Bu sonuçlara göre Romanov kuzularının vücut özelliklerinin gelişimini en iyi açıklayan ayrıca büyüme eğrilerine en uyumlu modelin Kübik model olduğu tespit edilmiştir.
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