Refine search
Results 41-50 of 625
The Role of Novel Pasteurization Approaches on Altering Functional Properties of Egg Proteins Full text
2019
Hülya Serpil Kavuşan | Meltem Serdaroğlu
Eggs are important components of the human diet due to their low cost, high protein content and protein related technological features. High digestibility of egg proteins makes it possible to consume alone in the assay of nutritive values. Binding, emulsifying, foaming, gelling, and thickening properties of egg proteins provide an opportunity to use egg in various food products as an ingredient. Therefore, the consumption of egg is increasing with each passing day, however, Salmonella enterica serovar Enteritidis and Salmonella Typhimirum infections have been reported to be egg-born. These serious infections are originated from direct consumption of eggs or unpasteurized food products in which the egg yolk/albumen is added to the formulations such as mayonnaise, salad dressings or merengues. In order to prevent these infections, aforementioned microorganisms must be eliminated from the environment by pasteurization. Commercial pasteurization process is applied with hot water or vapor. Commercial processes include high temperature/short time or low temperature/long-time pasteurization. Although heat treatment is considered the most reliable method in terms of microbiological safety, high temperature and/or long time applications may have adverse effects on functional and nutritional properties of egg proteins. To ensure the microbiological safety of products without sacrificing technological or nutritional properties, researches have been centered upon innovative techniques such as irradiation, pulsed electric field, high hydrostatic pressure, and radiofrequency applications. This review is aimed to bring out the amendments occurred in the egg protein structures in consequence of aforementioned pasteurization methods.
Show more [+] Less [-]Investigation of The Effect of Carvacrol Addition on The Change of Some Physicochemical and Bioactive Properties of Apple Juice Contaminated with Zygosaccharomyces bailii Full text
2019
Kevser Karaman | Osman Sağdıç
In this study, the effects of carvacrol addition which is a natural preservative to apple juice samples contaminated with Z. bailii which is an osmotolerant yeast and shows resistance against high sugar concentration, low acidity, ethanol content and pasteurization process, were investigated on some physicochemical and bioactive properties and also changes in yeast numbers during storage period. For this purpose, the response surface methodology was applied and storage time (1-41 days), storage temperature (4-20°C), sodium benzoate amount (0-0.1%) and carvacrol amount (0-750 ppm) were selected as processing variables. Significant changes in physicochemical properties were observed due to yeast viability occurred during the storage of apple juice samples. The increase in the amount of carvacrol caused a decrease in the number of yeasts about 7 log level and prevented the spoilage of fruit juices. However, the brix value of the samples without carvacrol showed a decrease of 50% as a result of yeast activity and the fruit juice could not be consumed. Total phenolic content of the sample was in the range of 136.7-645.7 mg GAE/L and the lowest total phenolic content was determined for the run 11 having no carvacrol while the highest total phenolic content was for the sample added with the highest carvacrol level. As a result of the optimization process, it was observed that the deterioration activities of Z. bailii could be prevented to a great extent by the addition of maximum amount of carvacrol.
Show more [+] Less [-]Fındık Üretimi Yapan İşletmelerin Tarım Sigortası Yaptırmaya Karar Verme Sürecinde Etkili Olan Faktörlerin Logit Regresyon Analizi ile Tahminlemesi: Düzce İli Örneği Full text
2019
Harun Kabaoğlu | Avni Birinci
Bu araştırma, fındık üretiminin yoğun olarak yapıldığı Düzce iline bağlı tüm ilçelerde, fındık üreticilerinin tarım sigortası yaptırmaya karar verme sürecinde etkili olan faktörlerin belirlenmesi amacıyla yapılmıştır. Düzce il merkezi ve 7 ilçede fındık üretimi ile iştigal eden 96’sı tarım sigortası yaptıran, 223’ü ise tarım sigortası yaptırmayan olmak üzere basit tesadüfi örnekleme yöntemi ile seçilen toplam 319 üretici ile 2016 yılında sahada yüz yüze görüşmek suretiyle anket çalışması gerçekleştirilmiştir. Anket sonucu elde edilen verilerle ilgili yapılan istatistiksel analizde lojistik regresyon yöntemi kullanılmıştır. Araştırmada, bağımlı ve bağımsız değişkenler arasındaki ilişkiyi tanımlayabilmek için mümkün olduğunca en az değişken kullanılarak en yüksek uyum gösterebilecek model kurulmuştur. Kurulan modelde bağımlı değişken olarak tarım sigortası yaptırma/yaptırmama, bağımsız değişkenler olarak da üreticilerin bireysel özellikleri, işletme özellikleri ve bilgi kaynaklarına olan yaklaşımları ele alınmıştır. Her grup için ayrı ayrı analizler yapılmıştır. Analizler sonucunda istatistiksel olarak 15 değişken anlamlı çıkmıştır. Lojistik regresyon analizi sonucu hane halkı sayısı, aylık gelir, fındık arazisi miktarı, ortakçılık/yarıcılık, afet zararı, devlet yardımından faydalanma, sigorta bilgisi ve sigorta eğitim isteğinin üreticilerin tarım sigortası yaptırmaya karar vermelerinde etkili olan en önemli faktörler olduğu belirlenmiştir.
Show more [+] Less [-]The Use of Germination Indices for Salinity Tolerance Classification of Pepper Cultivars Full text
2019
Gamze Kaya
The study aimed to evaluate the use of germination indices as a screening tool for salinity tolerance during germination and early seedling growth of pepper cultivars, and to distinguish the potential for genetic responses to salt tolerance. In the study, the seeds of seven pepper cultivars were germinated at increasing NaCl levels of 5, 10, 15 and 20 dS/m and distilled water as the control treatment for 14 days. Germination percentage (GP), mean germination time (MGT), germination index (GI), germination stress tolerance index (GSTI), seedling length (SL), seedling fresh weight (SFW) and vigor index (VI) were investigated. Results showed that germination percentage decreased with increasing NaCl levels while the highest germination percentage at 20 dS/m was 92% in BT Burdem with no significant reduction. Seedling growth of pepper cultivars was severely inhibited by increasing salinity stress. SFW was depressed depending on reduction in SL due to increasing NaCl. BT-Burli and BT İnce Sivri were the most tolerant cultivars to NaCl and they were used for genetic resources towards salinity. Seedling growth was much more sensitive to salinity than germination because of the highest percent reduction in seedling growth parameters. Among the parameters, GSTI gave the highest significant correlation coefficient with SL and SFW; indicating that it would be useful for estimating seedling growth. It was concluded that genotypic variation was observed among pepper cultivars for salinity tolerance and GSTI could be used for a predictor for salinity tolerance.
Show more [+] Less [-]Çiftçilerin Ürün Desenlerine Karar Vermelerini Etkileyen Faktörler: Samsun İli Bafra İlçesi Sebze Yetiştiricileri Örneği Full text
2019
Nur İlkay Abacı | Kürşat Demiryürek
Çiftçilerin tarım sektörünün doğal yapısından kaynaklanan birçok unsuru dikkate alarak çeşitli ürünler arasından kendilerine en uygun olanını nasıl seçtikleri ve üretimine nasıl karar verdiklerinin belirlenmesi önemlidir. Bu araştırmanın amacı, Samsun ili Bafra ilçesindeki sebze yetiştiricilerinin ürün desenlerine karar verirken etkilendikleri faktörleri belirlemektir. Bu amaca ulaşmak için basit tesadüfi örnekleme yöntemi ile belirlenen 122 çiftçi ile anket yapılmıştır. Çiftçilerin ürün desenlerine karar verirken etkilendikleri faktörleri belirlemek amacıyla, incelenen literatürden yararlanılarak ve araştırmacı tarafından yapılan pilot çalışmalardan hareketle sosyal ve kişisel, ekonomik, fiziksel ve iklim koşullarından kaynaklı faktörleri içine alan 67 madde tespit edilmiştir. Çiftçilerin düşüncelerini yansıtan ifadeler Likert tipi beşli bir ölçeklendirmeye göre puanlanmıştır. Araştırmada istatistiksel işlemler sırasına göre iç tutarlılık katsayılarının belirlenmesi, açıklayıcı faktör analizi, doğrulayıcı faktör analizi olarak gerçekleştirilmiştir ve bulgular sunulmuştur. Açıklayıcı faktör analizi sonucunda toplam varyansın %57,74’ünü açıklayan; ürün özellikleri, fiziksel özellikler, işletme özellikleri, doğal faktörler, sulama özellikleri ve işgücü özellikleri olarak altı faktör grubu ortaya çıkmıştır. Analiz sonuçlarından elde edilen bulgulara göre çiftçilerin ürün desenlerini planlarken etkilendikleri en önemli faktör ürün özelliği ile ilişkilidir. Ancak, çiftçiler üretecekleri ürünlere karar verirken sadece ürün özelliklerinden değil aynı zamanda ellerinde olmayan farklı koşullardan etkilenmektedirler. Dolayısıyla çiftçilerin kararlarını etkileyen faktörler arasında davranış özelliklerinin de dikkate alınması gerektiği düşünülmektedir.
Show more [+] Less [-]Bottled Water Consumption Habits and Purchase Behaviours of Consumers in the Urban Areas of Adana Full text
2019
Mutlu Bulut | Arzu Seçer
In recent years, the world population, urbanization process and need for natural water resources have increased. Therefore, providing the safe and clean drinking water has become an important topic of our day. This research was carried out to determine the bottled water consumption habits and purchasing behaviours of consumers. Primary data were obtained from 384 consumers living in urban areas of Adana province. The demographic characteristics and consumption habits of consumers were determined by calculating frequencies, ratios and averages. Factor analysis was used to determine the factors that affect the purchasing behaviours of the consumers and the cluster analysis were used to distinguish consumers with different perception levels from those with similar characteristics. Results indicated that 40.4% of participants consumed bottled water and 85.2% of these consumers took into account the brand of bottled water. Factor analysis revealed that 3 factors, product characteristics, packaging and price, and recognition affected purchasing behaviours in this sample. As a result of the K-means clustering analysis consumers in this study were divided into 3 groups. The most important factors for consumers in these observed clusters were shelf life, product freshness and product hygiene.
Show more [+] Less [-]Van Gölü Havzasında Totaliter Havza Yönetim Sisteminin Uygulanması Full text
2019
Ünal Şirin | Sedat Karaman | Şefik Tüfenkçi
Havza yönetimi, bir havzanın sınırları ile çevrili alan içerisinde kalan toprak, bitki, su ve bunları doğrudan ve dolaylı olarak etkileyen iklim, çevre, insan ve hayvan aktivitelerinin topyekûn değerlendirildiği sistemdir. 1990’lı yılların başlarından itibaren de doğal kaynakların korunmasına yönelik yapılan yönetim çalışmalara ilaveten geçim kaynaklarını iyileştirecek ve gelir düzeyini artıracak önlemleri de kapsayan yeni bir havza yönetim programı ortaya çıkmıştır. Totaliter havza yönetimi olarak adlandırabileceğimiz bu yeni havza yönetim sistemi entegre ve katılımcı havza yönetimi yaklaşımını esas almaktadır. Bütüncül bir anlayışla toplumun refah düzeyini artırmayı ve gelecek nesillere zengin bir doğal kaynak sunmayı hedefleyen totaliter havza yönetimi, yer altı ve yerüstü doğal kaynakların mutlak korunumunun yanı sıra bu kaynaklardan yeterli düzeyde yararlanmayı, ekonomik ve sosyo-kültürel hayatı iyileştirerek yoksulluğun azaltılmasını, uygulamalı araştırma ile rekabet gücünü artırmayı, çevre dostu anlayışı teşvik etmeyi, havza yönetimi faaliyetlerinin takip edilerek sürdürülebilir olmasını, iklim değişikliklerinden kaynaklanan olumsuz etkileri engellemeyi, su döngüsünün kayıpsız olarak devam etmesini ve havzalarda ki tahribatın önüne geçilmesini amaçlar. Bu çalışmada, Van Gölü havzasındaki doğal kaynaklar ile bu kaynakların kullanımları arasındaki düzenli ve düzensiz ilişkiler alt havza bünyesinde değerlendirilerek alternatifler üzerinde durulmuş olup özellikle su kaynaklarının kullanımında ki yanlış uygulamalar nedeniyle oluşabilecek olumsuz sonuçların giderilmesi için Van Gölü havzasına uygulanabilecek havza yönetim sistemi açıklanmıştır. Havzada aşırı sulamayı dengeleyecek etkin sulama sistemleri ile kuraklığa ve soğuğa dayanıklı sulamaya daha az gereksinim duyan alternatif bitki desenleri önerilmiştir.
Show more [+] Less [-]Input Use Efficiency in Sunflower Production; A Case Study of Konya Province (Karatay District) Full text
2019
Cennet Oğuz | Aysun Yener Öğür | Aycan Ayhan
The aim of the study is to analyse the efficiency of input use in sunflower production in Karatay district. Turkey ranks 10th in sunflower production in the world and Konya province has 13.39% capacity of sunflower production in Turkey, placing the 2nd place in terms of production. 97% of sunflower produced in Konya province is sunflower for oil. Data used in this study was determined as 51 enterprises manufacturing sunflower according to the Stratified Sampling Method. The economic efficiency results of sunflower production were calculated with Data Envelopment Analysis (DEAP) method. The total Gross Production Values (GPV) obtained from the enterprises is 50,221.43 $, the GPV acquired from the sunflower production is 23,844.70 $, the total gross profit is 36,927.29 $ and the sunflower gross profit is 18,285.16 $. According to the efficiency results, economic efficiency was found to be 0.604, resource efficiency was 0.604, technical efficiency was 0.868, and pure efficiency was 0.922 while scale efficiency was 0.942. It should be ensured that enterprises use their resources effectively. Information meetings should be held for enterprises on resource use.
Show more [+] Less [-]Storing and Evaluation of the Records of Livestock Enterprises in Database Full text
2019
Hasan Çelikyürek | Kadir Karakuş | Murat Kara
The data stored for a long time in livestock enterprises will play a crucial role in increasing the productivity in animal production, revealing animal breeding values, meeting qualified breeding needs, making effective breeding organizations, obtaining high income, determining the animals to be kept or as a breeder. Among the important technical data kept in livestock enterprises; ram, bull, and goat and their reproduction, growth-development, yield records (animal weight and wool yield in small ruminants, body weight gain, feed consumption, lactation and milk yield), reproductive performance measures, slaughter and carcass dimensions and characteristics records such as meat quality, animal diseases and vaccination practices can be shown as important technical data in livestock enterprises. Issues such as followed animals and storing identifying information of the animals from this data in the database are being made compulsory for conformity program of Turkey with the European Union by the rule number 27137 “Regulation on the identification, registration and monitoring of sheep and goat type of animals” that published in the official newspaper by Agriculture and Forestry Ministry on 10.02.2009. Nowadays, database software such as MySQL, MS SQL, Postrage SQL, Oracle, Firebird, IBM DB2 and MS Access are used in order to obtain healthy data and store the data safely. Knowledge of the use and cost of this database software and Database Management Systems (DBMS) is important for the enterprise. In this study, it is aimed to give information about the software that adds value to the enterprise and their costs of the operations on enterprise.
Show more [+] Less [-]Influence of Bacteria Isolated from Different Ecological Zone of Turkey on Maize Growth and Nutrient Uptake Full text
2019
Amer Abdulhadi Jawad | Ali Coşkan
The aim of this study was to find potential PGPR from sub-forest soil located different region soils of Turkey. Previous research indicated that the existing bacteria in arable soil are not capable to represent their individual performance most probably due to the competition. To overcome this phenomenon, soils are collected from sub-forest soil of Adana (Ad), Antalya (An), Hatay (Ha), Isparta (Is), Ordu (Or) and Sivas (Si) provinces. Experiment was carried out on the soil existing in Isparta in a greenhouse condition. Four fast growing bacteria colonies in tryptic soy (CASO) agar medium from each province were isolated and then, each isolate cultivated at liquid CASO broth until they reach 106 cfu ml-1. Experiments were carried out with a total of 24 bacteria including 6 province and 4 bacteria cultures from each region. The effects of those bacteria on biomass development and nutrient uptake of maize (Zea mays) were investigated. Sterile broth was applied treatment defined as control. The results revealed that 23 isolates out of 24 stimulated plants shoot dry weight. The highest value observed in the Or1 and Is4 isolates as 12.8 and 12.7 g plant-1 which around 77% higher than control whereas the lowest was in Or2 as 6.45 g plant-1. Plant nutrient concentrations were also influenced from inoculates where An1, Ad1, Or1, Is1 and Is3 significantly increased macro nutrients uptake where total N, available P, K, Ca and Mg were higher by 19%, 14%, 14%, 59% and 41% over the control, respectively. The Fe concentration was found 48% higher in Ad3 isolate. The Cu, Mn and Zn were the highest in Si3 as 43%, 30% and 31%, respectively. In general 4 out of 24 isolates were selected as promising PGPR for both plant development and nutrient uptake of maize.
Show more [+] Less [-]