Browsing by Publisher "Ege Universitesi"

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    Use of different natural dye sources for printing of cotton fabrics
    (Ege Universitesi, 2017) Ibrahim Bahtiyari M.; Benli H.; Yavaş A.; Akca C.
    In the study it was aimed to print cotton fabrics with natural dye sources to respond the demands on the natural products and cleaner production. For this purpose, bleached, bleached and mercerized cotton fabrics were colored by pigment printing method with the use of the extracts obtained from the five different natural dye sources "pomegranate peel, nutshell, orange tree leaves, alkanet roots and dyer's chamomile". By this way it was planned to show the coloration of cotton with natural dye sources. For the environmentally friendly production, no mordanting has been applied but good colors with sufficient fastnesses were observed from the printed fabrics nonetheless. In printing process, binder was used instead of mordanting agents for the fixing of the dye stuff. Like in other dyeing and printing processes, it was found that pretreatment processes had an effect on the printability of cotton with natural dyes. By mercerization higher color efficiencies, darker shades and meanwhile increases in light fastnesses and decreases in washing and perspiration fastnesses were generally obtained.
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    Sewing Machine Selection Using Linear Physical Programming
    (Ege Universitesi, 2020) Ilgın M.A.
    Sewing is a critical operation in garment production process. Therefore, alternative sewing machines must carefully be evaluated prior to procurement. Multiple criteria decision making (MCDM) techniques can effectively be used in sewing machine evaluation process since multiple evaluation criteria including speed and price must be considered. However, physically meaningless subjective weights are assigned to evaluation criteria in most MCDM techniques. Linear Physical Programming (LPP) is a MCDM methodology that eliminates this subjective weight assignment process by allowing decision makers to express their preferences in a physically meaningful way. In this study, a sewing machine selection problem faced by a textile company is solved using LPP. © 2020 Ege Universitesi. All rights reserved.
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    Development of Multifunctional Bio-based Cotton Composite
    (Ege Universitesi, 2021) Altınkaya E.
    In this study, the production and characterization studies of clay-chitosan based composites were investigated. The composite products were characterized by Scanning Electron Microscopy, Thermo Gravimetric Analysis, and Fourier Transform Infrared Spectroscopy. Besides antibacterial effect of the composites against S. Aureus and K. Pneumonia and dye adsorption properties were investigated. The effects of contact time, ionic strength, pH, and temperature on removal of remazol blue were investigated for the adsorption studies. The comparison was performed based on the characterization results of treated and untreated cottons. It was revealed that the one-step process of clay-chitosan-based fabrics gave significantly good properties to fabrics. These improved properties expressed the dyeing free-salt, antibacterial activity, and enhanced dyeability (dye adsorption capacity) of cotton. Consequently dyeability of the cottons was increased with the treatments. These treatments can be used in textile industry for the free salt dyeing which is a desirable property for the cotton in addition to the gained antibacterial activity. As a result, clay-chitosan composites can be considered as a hopeful composite for the multifunctional finishing textiles. © 2021 Ege Universitesi. All rights reserved.
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    Determination of consumers' food safety knowledge and awareness: The case of Ankara, Etimesgut; [Tüketicilerin gida güvenliǧi bilgi ve bilinçlerinin belirlenmesi: Ankara, Etimesgut örneǧi]
    (Ege Universitesi, 2022) Yüksel Ç.Y.; Karagözlü N.
    Objective: The objective of this study was to determine the relationship between the consumers habits of knowledge and awareness levels of food safety, consciousness in food preparation and consumption stages of the consumers living in Ankara, Etimesgut. Material and Methods: The material of the study consisted of the data obtained from the survey conducted with 517 adult volenteers with different demographic characteristics living in the Ankara, Etimesgut. The questionnaire form consisted of four parts and included questions about demographic characteristics, the level of food safety of consumers, and the level of knowledge and awareness of consumers during food preparation and consumption were asked. Results: As a result of the questions asked to determine the consumer's food preparation and consumption information and consciousness level, it was found that 7,9% of the consumers were low, 77,4% of them were middle, and 14,7% of them were highly conscious. The relationship between the questions in this group and the demographic characteristics were examined and it was concluded that the level of consciousness was statistically significant relation with gender (p <0.05) and income level (p <0.01). Conclusion: The most important resuls of the study were the answers given by the consumers who were concious about food safety but the practices in the kitchenwere wrong. These results show that the concept of food safety is fragmented in terms of knowledge and application and it is believed that if all of these parts is understood correctly, food security can be ensured. © 2022 Journal of Agriculture Faculty of Ege University. All right reserved.
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    Effects of different levels of water and nitrogen applications on the yield and quality of oregano (Origanum onites L.)
    (Ege Universitesi, 2022) Tokul H.E.; Bayram E.
    Objective: The objective of this study was to reveal the changes that will occur as a result of different water and nitrogen applications in the drug herb yield, drug leaf yield and essential oil ratios of Tayşi 2002, Ceylan 2002 cultivars belonging to oregano (Origanum onites L.). Material and Methods: In order to meet the objective given above, a study was conducted in Bornova ecological conditions in 2012 and 2013 and the varieties (Tayşi 2002, Ceylan 2002) of the oregano (Origanum onites L.) plants developed in the Department of Field Crops, Faculty of Agriculture were used. Experiments included 4 different (S1,S2,S3,S4) irrigation applications along with the 2 different nitrogen applications 80 kg/ha nitrogen (N80) and nitrogen-free (N0). The data obtained in two years (2012-2013) were then evaluated. Conclusion: As a result, on the study it was found that nitrogen applications alone did not have an effect. It was also determined that the yield values increased with the increase in the amount of irrigation applied, but the essential oil ratios decreased. © 2022 Journal of Agriculture Faculty of Ege University. All right reserved.
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    Consumers' buying habits: The case of Ankara, Etimesgut; [Tüketicilerin satın alma alışkanlıkları: Ankara, Etimesgut örneği∗]
    (Ege Universitesi, 2023) Yanğiç Yüksel Ç.; Karagözlü N.
    Objective: The objective of this study was to determine the relationship between the purchasing habits of the consumers living in Etimesgut district of Ankara province with different demographic characteristics such as age, gender, income level, education level and their purchasing habits. Material and Methods: The data obtained from the survey study conducted with 517 adult individuals with different demographic characteristics were used; demographic characteristics, food buying habits and places where consumers buy foodstuffs were examined. The obtained data were evaluated by applying SPSS program and chi-square (χ2) test. Results: The relationships between the education status of the consumers and whether the packaging is damaged during shopping and the gender and the label information of the product and whether it contains allergens were found to be significant. It has been determined that consumers prefer neighborhood markets when buying products such as fruits and vegetables, and that they consider the "street vendor" as having the lowest reliability. Conclusion: During shopping, especially attention should be paid to the expiration date, whether the packaging material is damaged; constitute the most important parameters of purchasing habits. The fact that consumers prefer their own products and supermarkets as the point of access to food reveals the importance of the correct and adequate functioning of the food control mechanism through the state. © 2023 Ege Universitesi. All rights reserved.
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    The Effects of Applications GA3, Cluster Tipping and Girdling on Yield and Quality in Superior Seedless (Vitis vinifera L.) Grape Variety; [Süperior Seedless (Vitis vinifera L.) Üzüm Çeşidinde GA3, Salkim Ucu Kesme ve Bilezik Alma Uygulamalarinin Üzüm Verim ve Kalitesine Etkileri]
    (Ege Universitesi, 2023) Camci H.; Çoban H.
    This study was carried out on own rooted 7 years old Superior Seedless (Vitis vinifera L.) table grape variety in a vegetation season of 2015 in Ahmetli district. The experiment was completely randomized block design with 7 treatment combinations replicated in three blocks. When all treatments was used at fruit set, GA3as 10 ppm dosage used for elongate cluster (when cluster length reached 7-8 cm). Control (C) only water was sprayed. The aim of this study was revealed effects of applications on grape yield and some quality characteristics of Cluster Tipping (CT), Girdling (G), CT+G, GA3+CT, GA3+G, GA3+G+CT. It was found that all applications generally had statistically (P<0.05) significant effects on grape yield, cluster weight, cluster width, berry length, berry width, berry length/berry width, soluble solid and titratable acidity in Superior Seedless. The highest grape yield, cluster weight, cluster length were obtained in GA3+G, the highest berry weight, the longest berry length were obtained in G, the highest soluble solid value were obtained in GA3+ CTR+ G and GA3+G respectively. As results of this study, general recommendation is made of GA3+G the most suitable application for growing Superior Seedless table grape variety. © 2023 Ege Üniv. Ziraat Fak. Derg.. All rights reserved.
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    Utilization of food waste in production of bacterial cellulose; [Gıda atıklarının bakteriyel selüloz üretiminde kullanımı]
    (Ege Universitesi, 2023) Özkaya P.; Dağbağli S.; Uyarcan M.
    Cellulose is defined as a polymer that exists in the cell walls of plant tissues and is widely used in many industrial fields. However, the recent threat of deforestation has led researchers to find alternative wood sources for cellulose production. For this reason, literature studies have focused on certain types of bacteria known to be capable of producing cellulose, such as Acetobacter, Gluconobacter, Alcaligenes, etc. It is stated that cellulose of plant origin and bacterial origin have a similar structure. Bacterial cellulose possesses a big economic and commercial potential depending on the purpose and the production method and is generally used in food applications as a fat substitute, rheology modifier, immobilization material for probiotics and enzymes, stabilizer of pickering emulsions, component of food coatings and green packaging film. Recently, it has become more prominent to use food waste as production inputs, such as beet and sugar cane molasses, fruit waste, dairy industry waste, etc. So, the utilization of industrial by-products, agro-forestry, and food industry residues as carbon sources has been providing significant advantages, such as increasing yield and reducing cost. The objective of this study was to present a general look related to bacterial cellulose production in combination with the use of food waste and future trends. © 2023 Ege Universitesi. All rights reserved.
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    CRISPR/Cas9-Mediated genome editing in grapevine protoplasts; [Asma protoplastlarında CRISPR/Cas9 aracılı genom düzenleme]
    (Ege Universitesi, 2025) Kaya H.B.
    Objective: This study aims to perform targeted mutation in grapevine protoplasts using the CRISPR/Cas9-mediated genome editing method. Material and Methods: For CRISPR (clustered regularly interspaced short palindromic repeats)/Cas9 (CRISPR-associated protein 9)-mediated genome editing in the Chardonnay cultivar, a gRNA design targeting the desired gene was performed, resulting in obtaining a final CRISPR/Cas9 vector containing both the gRNA and Cas9 and GFP genes. Protoplast isolation and transformation were performed using leaves, followed by analysis of transformation and mutation efficiency. Results: In the study, Chardonnay leaf protoplast isolation produced 1x107 protoplasts per 1 g of fresh leaves. The vector targeting the VvPDS gene (~10 kb) achieved a transformation efficiency of 40-60%, while the vector containing only the GFP gene (~3 kb) reached 80-90% efficiency. Vector size notably impacted transformation, with larger vectors reducing efficiency. Despite successful transformation, the presence of the targeted mutation could not be confirmed. Conclusion: The study successfully completed all stages from gRNA design, the initial step of CRISPR/Cas9-mediated genome editing in protoplasts, to the final protoplast transformation stage, showcasing the system's seamless usability. The protocols applied and the results obtained can be utilized in future studies aimed at implementing targeted mutations in grapevines. © 2025 Ege Universitesi. All rights reserved.