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Extraction and Characterization of Gelatin from Mackerel (Scomber scombrus) and Sea bass (Dicentrarchus labrax) Bones
2016
Yasemen Yanar | Mehmet Gökçin
The aims of this study were to determine the physicochemical properties of extracted gelatins from mackerel (Scomber scombrus) and sea bass (Dicentrarchus labrax) bones and compare with those of commercial fish and bovine gelatins. The yield of gelatin obtained from the bone of mackerel and sea bass were 5.98 and 6.20%, respectively. Two extracted gelatins showed higher protein content, lower moisture content compared to both commercial gelatins, indicates that the gelatin has considerably high purity. Melting temperatures of mackerel and sea bass bone gelatins were 25.5 and 23°C, respectively. Mackerel bone gelatin was yellow in appearance and higher L* value than both commercial gelatins. It can be concluded from the present study that mackerel and sea bass bone are a prospective source to produce gelatin in good yield with desirable functional properties comparable to commercially available mammalian and fish gelatins.
Afficher plus [+] Moins [-]The Threat of Ochratoxin A in Poultry Nutrition
2016
Emrah Güngör | Aydın Altop | Güray Erener
Ochratoxin A is a toxic substance coming up with growing up of some species of Aspergillus and Penicillium at feedstuffs. Diseases and deaths can occur if this toxic substance is consumed by animals. Ochratoxin A can contaminate easily feedstuffs of mixed feeds while producing, harvesting and storing period and pose a serious threat for world and Turkey considering existing rate in feed and feedstuffs. Moreover taking account of passing to animal tissues, ochratoxin A pose a serious risk for human health. Regarding this, ochratoxin A has negative effects on human such as disorders of kidney and reproductive organs. In addition there is various methods to eliminate this damages made by ochratoxin A. In this review, existing of ochratoxin A in poultry feeds, the negative effects on poultry, transition to tissues and practices that can ease the negative effects were summarized.
Afficher plus [+] Moins [-]Effects of Temperature on Time Dependent Rheological Characteristics of Koumiss
2016
Serdal Sabancı | Ömer Çokgezme | Derya Tezcan | Mutlu Cevik | Filiz İçier
The rheological properties of koumiss were investigated at different temperatures (4, 10, and 20°C). Experimental shear stress–shear rate data were fitted to different rheological models. The consistency of koumiss was predicted by using the power-law model since it described the consistency of koumiss best with highest regression coefficient and lowest errors (root mean square error and chi-square). Koumiss exhibited shear thinning behavior (n
Afficher plus [+] Moins [-]The Applications to Increase Drought Tolerance of Plants
2016
İlkay Yavaş | Hüseyin Nail | Aydın Ünay
Terminal drought is a major threat that adversely affects crop growth and metabolism, and limits the yield. Water stress causes many morphological, physiological and biochemical changes in plants. Plant height, root length, leaf area, fresh and dry biomass are reduced under drought stress. Besides, water stress causes the reduction of relative water content, the closure of stomata and decrease in photosynthesis and chlorophyll content. Antioxidant enzymes such as glutathione reductase (GR), superoxide dismutase (SOD), peroxidase (POD), ascorbat peroxidase (ASC), glutatiton (GSH), catalase (CAT) enzyme activities, the indicator of oxidative stress malondialdehyde (MDA) and proline levels also changes in drought conditions. Nutrient uptake by plants is prevented or restricted before grain development stage during drought conditions. Therefore the application of plant nutrients followed by micronutrient remobilization within plant is great importance. Osmoprotectants (cytokinin, mannitol, abscisic acid, proline, glycine betaine, polyamine etc.) detoxify adverse effect of reactive oxygen species (ROS) and alleviate drought stress. Exogenous plant growth promoting rhizobacteria (PGPR) application encourage plant growth by colonizing the plant root and increase plants’ resistance to water stress. Besides, the farmers can use conservation tillage system in dry periods.
Afficher plus [+] Moins [-]Edible Macrofungi of Çorum Province
2016
Sinan Alkan | Gıyasettin Kaşık | Celâleddin Öztürk | Sinan Aktaş
According to the scientists, the world's population by 2050 is estimated to exceed 9 billion, in order to meet the nutritional needs of people, it is expected that in the future to need more food production than today. Therefore in the world, food organizations, institutions and communities various action plans provide in the reports published. In these plans, diversification of the production, fast, quick and easy way to produce food, less harmful farming practices to the nature and the environment, and etc. topics are included. In line these plans with last years, the greater the number of species used as food and with ease of cultivation, mushrooms and mushroom cultivations are gaining importance. For this purpose, the determination of the diversity of edible mushrooms in nature and investigation that how can be taken to culture, it will also provide support to the production of different species of mushrooms. In the field studies performed between 2011 and 2013, after taking pictures on their habitats mushroom samples, collected within the Çorum province limits, were brought to the laboratory wrapped in aluminum foil properly. After measuring and studying on special structures under a microscope in the laboratory, they were identified according to the literature. Fungarium tag were prepared for identified mushrooms. These mushrooms, made into the Fungarium materials, were stored in Fungarium of the Directorate of Mushroom Application and Research Centre of Selçuk University. In conclusion, according to the literature four taxa belong to Ascomycota and 52 taxa belong to Basidiomycota, in totally of 56 taxa were found to be edible feature. These 56 taxa were represented by two divisio, four ordo and 14 families. The localities of identified species in the provincial boundaries are given. The names of species known among people with ethno mycological research, done during field studies, also were detected.
Afficher plus [+] Moins [-]Spray Drying of High Sugar Content Foods: Improving of Product Yield and Powder Properties
2016
Mehmet Koç | Figen Kaymak-Ertekin
Spray drying is the most preferred drying method to produce powdered food in the food industry and it is also widely used to convert sugar-rich liquid foods to a powder form. During and/or after spray drying process of sugar-rich products, undesirable situation was appeared such as stickiness, high moisture affinity (hygroscopicity) and low solubility due to low molecular weight monosaccharides that found naturally in the structure. The basis of these problems was formed by low glass transition temperature of sugar-rich products. This review gives information about the difficulties in drying of sugar-rich products via spray dryer, actions need to be taken against these difficulties and drying of sugar-rich honey and fruit juices with spray drying method.
Afficher plus [+] Moins [-]Yield, Quality and Water Use Efficiencies of Silage Maize as Effected by Deficit Irrigation Treatments
2016
Ali Beyhan Ucak | Tugay Ayasan | Nizamettin Turan
The present study was carried out to investigate the effects of different water deficit levels applied through growing season on silage yield, quality and water use efficiency (WUE) of main crop silage maize under semi-arid climate conditions during the years 2014 and 2015. Irrigation treatments were set as 100% (I100), 70% (I70) and 35% (I35) supply of depleted water within 0-90 cm effective root zone in 7-day intervals. Applied irrigation water quantities in I100(control) treatment of the first and second year (in 8 irrigations) were respectively observed as 693 and 666 mm. Plant water consumptions in control treatment were respectively measured as 770 and 738 mm. Silage yield was 10650 kg da−1 in the first year and 10600 kg da−1 in the second year. The silage yield obtained from I70 treatment with 30% water deficit was statistically placed in group (B) following I100 (control) treatment. The water deficits over 30% resulted in significant decreases in silage yield and quality. The correlation coefficient between ETa and dry matter was respectively identified as (r: 0.78), (r: 0.87) in 2014 and 2015 and the correlation coefficient between plant water consumption (ETa) and protein content was respectively identified as (r:0.81), (r:0.80) and the correlations between ETa and quality parameters were found to be positive and highly significant. There were significant linear correlations between ETa and kernel yield (Y). Yield response factor (ky) of experimental years were respectively calculated as 0.74 and 1.06. Irrigation water use efficiency (IWUE) values varied between 3.80-5.10 kg da−1 mm and water use efficiency (WUE) values varied between 3.62 and 4.42 kg da−1 mm.
Afficher plus [+] Moins [-]Role of Production Area, Seasonality and Age of Fermented Camel (Camelus Dromedarius) Milk Gariss on Mineral Contents
2016
Adam Ismail Ahmed | Babiker Elwasila Mohamed | Nuha Mohamed Elkhatim Yousif | Bernard Faye | Gerard Loiseau
The objective of this work was to study the differences between some minerals content of gariss samples collected from two different production areas in two different production systems (i.e. traditional system Kordofan area and semi-intensive system- which, the camels are kept in an open barn and graze around the farm. The lactating female camels are supplemented with concentrates in addition to good quality ration containing groundnut cake and Sorghum biocolor and water supply upon required in Kordofan and Khartoum provinces in Sudan at the different seasons (summer, autumn and winter) and their gariss samples were collected. Sodium, potassium, calcium, magnesium and phosphorus of gariss samples collected in autumn season (Kordofan area), summer season (Khartoum area), and winter season (Khartoum and Kordofan areas) were determined, after that the age of gariss was noted from farmers directly when the samples were collected. Four different ages of gariss which registered were (5-8 hrs, 12 hrs, 48 hrs and more than 48 hrs). Each fermentation time (age of gariss) was used for analyzing mineral contents. The results showed that gariss prepared from different production locations and in different seasons in Kordofan and Khartoum production areas were statistically different in most of the mineral contents determined. To conclude, different feeding sources or different physiological status may affect camels’ milk and consequently their gariss product, also different age of gariss had affects the mineral content of milk.
Afficher plus [+] Moins [-]Determination of Ecological Worldview of the Agriculture Faculty Students
2016
Bekir Demirtaş | Nuran Tapkı
New Ecological Paradigm Scale (NEP) is commonly used to determine people’s environmental opinion and their behaviors about it. Environment-friendly and sustainable agricultural production techniques are one of the most important issue in agricultural engineering. In this study, agricultural engineer candidates’ environmental behaviors were determined by using of NEP scale. Data was collected from 350 undergraduate students in 2015-2016 school year. Environmental behavior mean was found as 3,38 that indicates slightly better than average environmental behavior. Four sub dimensions were determined with Explanatory Factor Analysis and variance was found 68%. According to First and Second-Order Confirmatory Factor Analysis, data showed results that confirm models. Second-Order Confirmatory Factor Analysis explanatory rate was found 78%. Despite all technological development, mankind still under the influence of natural laws and there is a serious environmental degradation by human activities. Agricultural engineer candidates showed a behavior that is balanced between environmental awareness and meeting humans’ nutrition needs.
Afficher plus [+] Moins [-]Impact of Essential Oils Obtained from Safflower Stem and Roots on Germination and Seedling Growth of Wheat, Barley, Sunflower and Chickpea
2016
Sibel Day
The phytotoxic impact of safflower extracts prepared by different plant parts like stem and root of it on germination and seedling growth of plants like wheat (Triticum aestivum L.), barley (Hordeum vulgare L.) sunflower (Helianthus annuus L.) and chickpea (Cicer arietinum L.) were studied. Root and stem extracts of safflower at 2.5, 5 and 10% concentrations were obtained from safflower residuals after harvest of the plants. Mean germination time and percentage, root and shoot length, fresh and dry weight of seedlings were investigated. Essential oil composition of both root and stem extracts were determined. Results indicated that extract doses significantly influenced mean germination time of sunflower and chickpea. Germination time of wheat and barley also decreased with the increasing extract doses. The other growing parameters of all crops were also decreased with extract doses. The main essential oil compound of root extract was 1-Pentadecene (47.78%) followed by 2-Naphthalenemethanol (33.07%). The main essential oil compound of stem extract was 2-Naphthalenemethanol (49.15%) followed by Lauryl alcohol (22.26%). Root and stem extracts of safflower showed different effects. Stem extract mostly had severe impact on sunflower while root extract had this impact on wheat and barley. Consequently, removing stem parts of the safflower from field could reduce the amount of secondary metabolites released from the plant parts.
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