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Application of Plasma Technology in Food Processing
2020
Aslı Albayrak | Gülden Başyiğit Kılıç
Consumer demands for raw or unprocessed foods increased due to consumers’ awareness of the importance of a healthy life. However, searching alternative techniques instead of heat treatment is an important issue for the industry in order to enhance the microbiological quality. Non-thermal techniques are encouraged because of their effectiveness on the preservation of natural aroma, flavor and microbiological quality without causing any change in the structure of the product. Plasma technology is one of these alternative techniques. Plasma technology, known as the fourth state of matter, is known as the partial ionization of positive and negative ions, free radicals, charged particles and molecules in electron and photon form. Plasma is usually forms or formed by electric or electrical discharge or by a strong radiation effect. Plasma is classified according to its temperature, thermal equilibrium, and pressure. Cold plasma technique is used in foods for contaminated surfaces and cleaning of medical instruments. In this review, plasma technology applied to foods and their effects are presented.
Afficher plus [+] Moins [-]The Effect of Leaf Applications “Bio-fertilizers” on Yield and Some Yield Components of Wheat at Different Development Periods
2020
Hayati Aslan | Hatun Barut | Sait Aykanat | Enis G Hekimoğlu
This study was conducted to determine the effects of “biofertilizers” (N 8%, P2O5 1%, 9% K2O, 3% Iron, 0.06% Zinc, Bacillus subtilis (GBO3), Bacillus subtilis, Bacillus licheniformis, Bacillus amyloliquefaciens ve Bacillus pumilus) eaf applications on yield and quality parameters of bread wheat at different developmental stages. The experiment carried out for this purpose was conducted in the wheat sowing seasons of 2017-2018 and 2018-2019 at Doğankent location of the Eastern Mediterranean Agricultural Research Institute. In this research, “biofertilizers” leaf applications were applied to the wheat in different stages of development. For this purpose, 4 themes were worked out as; control, tillering, tillering + stem elengation and stem elengation. Biofertilizers doses of 100 gr/da in the first year and 0.75 gr/da in the second year were investigated. As a basic fertilizer for all experiment subjects; 15 kg DAP per decar were given during sowing period and 29 kg Urea during the tillering period, as a result of the research carried out; using biofertilizers in wheat farming, both in tillering and stem elengation periods, increased the yield 12.67% more efficiency in the first year and 13.16% more in the second year than the control subject. There were no statistically significant effects on quality parameters of wheat by using “biofertilizers” in foliar applications.
Afficher plus [+] Moins [-]Assessment of the Role of Small-Scale Irrigation Practice on House Hold Food Security in Haramaya District, Eastern Haraghe Zone, Eastern Ethiopia
2020
Tasisa Temesgen Tolossa
However, irrigation practice is poor in Ethiopia, increases agricultural production and productivity. The study was conducted in Haramaya district, Eastern Ethiopia. The object of this study is to see contribution of small scale irrigation towards increasing agricultural production, and identify the factors that affecting the use of small scale irrigation. From the district, three peasant associations were purposively selected each from different agro ecological classifications. Sampling size of 116 households was interviewed and Secondary data were also collected from the office. Three different types of irrigation were identified; Surface irrigation type using furrow method of irrigation is the most common irrigation type in the study area, which accounts about 66.5%. The study indicated that, water scarcity, lack improved seed, and disease outbreak and drought were among the major constraints of irrigation practices in the study area. Therefore practicing water harvesting and supplying improved technologies provide extended service regularly for farmers should be practiced in the future.
Afficher plus [+] Moins [-]Survival of Foodborne Pathogens in Homemade Fig and Mulberry Vinegars
2020
İlkin Şengün | Gülden Kılıç
This work reports the survival status of Listeria monocytogenes, Escherichia coli O157:H7, Staphylococcus aureus and Salmonella Typhimurium in homemade fig and mulberry vinegar. Each pathogen was separately inoculated in vinegar samples at approximately 7 log CFU/mL. The survival status of pathogens was examined at 20°C for 0, 15, 30 and 60 min, and 4, 8 and 24 h. The residual populations after 24 h were below detection limit for all species assayed. S. Typhimurium was much more sensitive to mulberry vinegar ( 6 log reduction in 30 min) than it is to fig vinegar ( 6 log reduction in 24 h). L. monocytogenes had an overall quite different behaviour, being the most sensitive species to fig vinegar ( 6 log reduction in 4 h) while being the most resistant one to mulberry vinegar ( 6 log reduction in 24 h). The total phenolic content of fig vinegar (767 mg GAE/L) was higher than mulberry vinegar (557.5 mg GAE/L). The results exhibited that antimicrobial activity of vinegar is mainly related to the contact time, test pathogen and physicochemical properties of vinegar.
Afficher plus [+] Moins [-]Effects of Gibberellic Acid and Salicylic Acid Applications on Some Physical and Chemical Properties of Rapeseed (Brassica napus L.) Grown Under Salt Stress
2020
Kürşat Korkmaz | Mehmet Akgün | Ayşegül Kırlı | Mehmet Muharrem Özcan | Özbay Dede | Şevket Metin Kara
In agricultural production, one of the limiting factors on plant growth and yield is soil salinity. The plant growth regulators are of considerable importance in alleviating the negative effect of salt stress. The study was carried out to determine the effects of salicylic (SA) and gibberellic acid (GA3) on the growth and some physiological characters in canola (Brassica napus L.) under salinity conditions in greenhouse. For this purpose, a factorial experiment set up as completely randomized design was conducted with three levels of SA (0, 0.5 and 1 mM) and GA3 (0, 50 and 100 mg l-1) and four levels of NaCl (0, 50, 100 and 150 mM) with three replications. In the study, leaf area, plant height, electrolyte leakage, chlorophyll content and the loss of leaf turgor were investigated. Salt treatments reduced significantly all of the considered parameters, compared with the control. Salinity caused a significant reduction of 63 and 67%in plant height and leaf area, respectively, as compared to the control plants. On the contrary, electrolyte leakage was markedly increased (six-fold) with increasing NaCl levels. Gibberellic acid increased significantly plant height and reduced the loss of leaf turgor, without a significant improve in other parameters. The results indicated that application of SA and GA3 to salinity stressed plants did not significantly affect canola vegetative growth. However, GA3 caused a partial decrease in the adverse effect of salinity.
Afficher plus [+] Moins [-]A Laboratory Evaluation for the Potential of Entomopathogenic Fungi against Tribolium castaneum (Herbst.) (Coleoptera: Tenebrionidae)
2020
Muhammad Akmal | Shoaib Freed | Muhammad Bilal | Muhammad Naeem Malik
The red flour beetle is a very important primary insect pest of wheat worldwide. The experiments were performed to check the virulence of Beauveria bassiana and Isaria fumosorosea by insect dipping method on the adults and 2nd instar of Tribolium castaneum. Conidia were taken from 15 days old fungi and subsequently four concentrations i.e., 2×108, 3×108, 4×108 and 5×108 spores/ml of both fungi were prepared in 0.05% Tween 80 solution. Minimum 12.5% and maximum 32.5% mortality of adult insects was recorded on 7th day after the treatment at 2×108 and 5×108 spores/ml concentrations of B. bassiana, respectively while on larval stages, minimum 2.5% on 5th day and maximum 80.0% mortality was observed on 7th day post treatment of B. bassiana, respectively. On the other side, minimum 7.5 and maximum 22.5 mortality percentage was noted on 7th day post application of I. fumosorosea, respectively while on immatures minimum 5% on 6th day and highest 70% mortality was noted on 7th day post infection with 2×108 and 5×108 spores/ml of I. fumosorosea, correspondingly. This study showed the effectiveness of insect pathogenic fungi against the important stored grain insect pest and proved to be a positive management strategy.
Afficher plus [+] Moins [-]Planning Conditions of Milking Parlours Under a Separate Roof from The Milking Cow Barns: A Simple Milking Parlour Project
2020
Ünal Şirin | Sedat Karaman | Fatih Mehmet Kızıloğlu
Milking parlours are concrete constructions where milk is milked from cows, stored and transferred. These create the last stage of the work flow chart in dairy cattle farms. Quality of milk is important in the production of milk and dairy products owing to the fact that milk is one of the basic food requirements of people. The quality of milk depends on the genetic conditions of the cows as well as their well-being, the appropriate level of care and environmental conditions and milk being obtained in a clean environment which isolated from negative external factors. Milking parlours should be planned under a separate roof from the dairy cattle barns in order to ensure hygiene conditions, facilitate the work flow and reduce the negative effects on the health of cows and people. However, not including very large enterprises, it is planned as an add-on to other items under the same roof with the dairy cattle barn due to reasons such as decreasing the cost in the small, medium and majority of large-scale enterprises and the society does not care about hygiene conditions. Production in this wise is not appropriate to ensure the requirements about hygiene conditions in the production of milk and dairy products, since the milking parlours are directly under the environmental conditions of the barn. In this paper, it is explained the criteria to be considered in the process to plan and design milking parlour and it is aimed the generalization of milking parlour be built as a construction separate from the dairy barn, with an exemplary milking parlour project with 2×12 fishbone milking system.
Afficher plus [+] Moins [-]Fonksiyonel Özellik Sağlayan Doğal Bileşenlerin Et Ürünlerinde Kullanımı
2020
Işıl İlter | Figen Ertekin
Et ürünleri günlük beslenmede büyük öneme sahiptir. Tüketici beğenisini et ürünlerinin fiziksel ve fonksiyonel özellikleri sağlamaktadır. Bu özelliklerinin yanı sıra insan sağlığına olan etkileri bakımından da bir değerlendirme yapılmaktadır. Bu çalışmada et ürünlerinin formülasyonlarının fonksiyonel özelliklere göre düzenlenmesi, işleme, depolama ve tüketim modifikasyonları ve fonksiyonel gıda olarak tanımlanan et ürünleri ele alınmıştır. Et ve et ürünleri; yağ asitleri, mineraller, diyet lifi, antioksidanlar ve biyoaktif peptitler gibi önemli besinleri diyete vermek için büyük potansiyele sahiptir. Bununla birlikte, bu bileşenlerle başarılı ürünler üretmek, stabilitelerini arttırmak ve lezzetli olmaları için yeni teknolojiler geliştirilmektedir. Kullanılan bileşenlerin doğal olması, yapılarındaki mevcut sağlığa faydalı bileşenlerin de diyet ile alınmasını sağlaması bakımından önem taşımaktadır. Gıda ürünlerinin sindirim ile metabolizmaya katılması sebebiyle yapılan in vitro çalışmalar da doğal bileşenler ile geliştirilmiş et ürünleri için önemli bir değerlendirme kriteridir.
Afficher plus [+] Moins [-]Camel milk: As a New Protein Source to Use for Yoghurt Production
2020
Selda Bulca | Atakan Koç
The main purpose of this study was to investigate the possibilities of technological production of camel milk yoghurt. First of all, denaturation of antimicrobial substances in camel milk by heat treatment and their effects on pH decrease and on the viscosity were analysed. Although the pH decrease was present, the viscosity of camel milk didn’t change. In the study, two different heat treatments (20 min at 90°C and 20 min at 95°C) were applied to camel milk and pH and SH (Soxhelet Henkel) values were determined until pH reached 4.7 during fermentation. After culture addition the pH drop was at 90°C for 20 minutes heat-treated camel milk slower than the camel milk heated at 95°C for 20 minutes. Similarly, the increase in SH in the cultured milk treated at 90°C for 20 minutes was slower than the increase in SH in the cultured milk treated at 95°C for 20 minutes. In the next study, viscosity and pH changes in yoghurt produced from cow and camel milk were compared. For this purpose, both milks were heat treated at 80°C for 20 minutes. After 180 minutes in cow’s milk, the viscosity was 9891 mPa.s, and after 210 minutes it reached 25237 mPa.s. In contrast, the viscosity in cultured camel milk was determined as 1210 mPa.s after 90 minutes, while the viscosity remained around 1216 mPa.s after 380 minutes. In the next study, for the production of yogurt from cow milk and camel milk were performed. Both milks were heat treated at 80°C for 20 minutes and changes in viscosity and drop of pH during fermentation were analysed. After the 180 minutes of fermentation in cow’s milk the viscosity came to 9891 mPa.s, after 210 minutes it was 25237 mPa.s. In contrast, after 90 minutes in the cultured camel milk, the viscosity was 1210 mPa.s, while after 380 minutes the viscosity reached to 1216 mPa.s. E. coli, L. bulgaricus and Listeria innocua were used to determine the antimicrobial effect of raw camel milk, cow milk, heat treated camel and cow milk camel colostrum. While camel milk and colostrum had inhibitory effect on E. coli, L. bulgaricus, Listeria innocua was not inhibited
Afficher plus [+] Moins [-]Biological Features and The Mortality Life Tables of Aleyrodes lonicerae Walker (Hemiptera: Aleyrodidae) on Rosa sp.
2020
Tülin Özsisli | Bağdel Çelik
Biology of the Lonicera whitefly, Aleyrodes lonicerae Walker (Hemiptera: Aleyrodidae) were studied on rose, Rosa sp. (Rosaceae) plants. Whitefly adults were collected from Mercurialis annua L. (Euphorbiaceae) plants in Adana. The development duration of egg, first, second, third, fourth larval (pupa) stages, total of A. lonicerae on Rosa sp. plants at 20°C were 8.44, 5.44, 5.50, 4.50, 5.19 and 29.07 days for the females and 8.15, 5.46, 5.92, 4.92, 5.38, 29.83 days for the males respectively. The development duration of egg, first, second, third, fourth larval (pupa) stages, total of A. lonicerae on Rosa sp. plants at 25°C were 8.00, 1.67, 2.33, 2.67, 9.67, 24.34 days for the females and 7.67, 2.33, 2.33, 3.33, 7.83 and 23.49 days for the males respectively. The mortality rate (%) of egg, first, second, third, fourth larval (pupae) stages of A. lonicerae at 20 and 25°C temperatures were 14.70, 13.97, 25.00, 20.58, 4.41; 2.89, 24.65, 26.08, 20.28, 13.06 respectively. The biggest k values at 20 and 25°C on rose plants were 0.2553 for the third larval stage and 0.3010 for the fourth larval stage, respectively.
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