Publications by authors named "İbrahim Palabıyık"

Chocolate is a food with complex microstructure properties. In this study, chocolate surface and internal microstructures are discussed considering final product quality and stability. In addition, the effects of the solids and continuous phase components and the interactions between them, and also process effects on the microstructure were reviewed.

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The main objective of this study was to evaluate the effects of various formulations of fruit juice concentrates (pomegranate, grape, and sour cherry) on the pH, water activity, density, color, texture, and microstructure characteristics of candies instead of glucose syrup. The experimental points of the study were examined by a D-optimal mixture design to optimize the concentration of fruits used in the formulation and achieve excellent physicochemical characteristics. Fruit juice concentrates, either singly or in combination, were used as a complete substitute for glucose syrup in the formulation.

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In this study, phycocyanin obtained from extract was used at various concentrations as a natural blue color source in toffee-type soft candy, and the effect of various storage temperatures (4, 20, and 40°C) on the color stability was investigated. In addition, main quality parameters, such as water activity, texture, and sensory analysis, were determined in the samples stored for 3 months at 20°C, and thus the effect of phycocyanin addition on the product appeal was studied. According to the results, the addition of phycocyanin powder did not significantly affect water activity ( > .

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Dairy product alternatives have increased in recent years as a result of medical prescriptions or personal preferences. The main purpose of the present study was to optimize vegan-based cream cheese formulation added with citrus fiber considering the textural and physicochemical properties of the samples. The physicochemical (pH value, water activity, and color), texture, microstructure, and sensory properties of manufactured vegan-based cream cheese were characterized and compared to those of a commercial one.

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The baking process has the potential to generate health-risk compounds, including products from lipid oxidation and Maillard reaction. Pre- and post-digestion levels of hydroxymethylfurfural (HMF), malondialdehyde (MDA), glyoxal (GO), and methylglyoxal (MGO) were studied in cakes formulated with hazelnut and sunflower oil, along with their oleogels as margarine substitutes. The concentration of HMF in oil and oleogel-formulated cakes increased after digestion compared to cakes formulated with margarine.

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This study aims to investigate the impacts of factors, including textural properties, surface roughness, and contact angle, on the cleaning performance of food soils and develop a preliminary mathematical model to predict the cleaning score, depending on the soil-surface properties. The force required to remove soil from the surface was determined by a texture analyzer equipped with a newly designed probe. Potato puree and egg yolk soils showed high adhesive forces compared to other deposits.

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In this study, modified bovine gelatin was produced using the alkaline technique with four different oxidized agro-industrial food waste (pomegranate peel (PP), grape pomace and seed (GP), black tea (BT), and green tea (GT)) phenolic extracts (AFWEs) at three different concentrations (1, 3, and 5% based on dry gelatin). The effect of waste type and concentration on the textural, rheological, emulsifying, foaming, swelling, and color properties of gelatin, as well as its total phenolic content and antioxidant activity, was investigated. Significant improvement in gel strength, thermal stability, and gelation rate of gelatin was achieved by modification with oxidized agro-industrial waste extracts.

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In this study, the effects of temperature (22, 24, 26, 28, and 30°C) and strain (0.1%, 1%, and 5%) on cocoa butter (CB) crystallization were investigated by oscillatory test, and the four-parameter Gompertz model was used to interpret the effect of parameters on pre-crystallization, nucleation, and crystal growth stages of CB. Lag time and growth rate were calculated using the Gompertz model using time-dependent storage modulus (G') data.

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In this study, the effects of independent variables such as alkaline (NaOH) salt concentration (3.0-6.0 g/100 mL), alkalization temperature (60-90 °C), and time (20-40 min) on cocoa powder (low-fat) properties were investigated by using Central Composite Design.

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In this study, the effects of main gum base components, namely butyl rubber, polyvinyl acetate and natural resin, on the aroma (menthol) release mechanism and quality of sugar-free chewing gums were investigated. According to the results, the sensory evaluation of aroma release was closely similar to the analysis performed with the GC-MS equipment. The Korsmeyer-Peppas model was the best model explaining the menthol release from chewing gum, and it was found that the release was mostly in the form of Fickian diffusion.

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In this study, we discussed covalent and non-covalent reactions between cocoa polyphenols and proteins (milk and cocoa) and the possible effects of these reactions on their bioaccessibility, considering environmental and processing conditions. Better insight into these interactions is crucial for understanding the biological effects of polyphenols, developing nutritional strategies, and improving food processing and storage. Protein-polyphenol reactions affect the properties of the final product and can lead to the formation of various precursors at various stages in the manufacturing process, such as fermentation, roasting, alkalization, and conching.

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In the present study, the effects of the treatment of chia seeds with a cold atmospheric pressure plasma jet (CP) using argon as a working gas for different times (30, 60, and 120 s) on the rheological, structural, and microstructural properties of the freeze-dried mucilages at -54 °C were investigated. All mucilage gels showed pseudoplastic flow behavior, and CP treatment of chia seeds increased the viscosity of mucilages, probably due to the cross-linking between polymer molecules. The dynamic rheological analysis revealed that all mucilages were elastic gels and that CP treatment improved the elastic properties in a treatment time-dependent manner.

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The use of dried grape pomace (DGP) as a bulking agent for partly substitution of sugar, milk powder and whey powder in compound chocolate (CC) was investigated. D-optimal mixture design was used to determine the effect of composition on the particle size, flow behaviour (Casson yield value and plastic viscosity), as well as total phenolic and resveratrol contents before and after in vitro digestion. The various models (linear, quadratic and cubic) which were identified as significant ( < 0.

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In this study, a novel rheometer-based method was explored to determine the melting point of gummy, which is one of the most consumed confectionery products. The new method is based on the vertical deformation of a solid sample since melting points of the products were determined by performing onset analysis on the graph of gap values against temperature. Peltier system heating rate and sample thickness parameters were used to develop the method.

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The potential for the use of rice bran, an agricultural waste, as a substrate in the manufacture of gellan gum was examined. Using a standard strain of Sphingomonas paucimobilis (ATCC 31461) and rice bran substrate, gellan gum was produced under optimized conditions. The optimal yield of gellan gum using rice bran substrate was found to be 11.

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The motivation in the preference of confectionery products consists of the perception formed during the purchase and consumption. This perception is a direct determining factor in the repeated purchasing behavior of the consumer. Also, the products must meet consumer demands.

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The food industry is in search of innovative processing technologies that are capable of providing food safety and improving quality with low processing costs and fast operations. As a new technique, cold plasma (CP) fulfills these requirements and thus gained significant attraction from researchers. Apart from general microbial inactivation purposes, CP can effectively modify the food macromolecules through reactions with reactive plasma species.

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Chocolate is a non-Newtonian substance, and such substance has different viscosities at different shear rates. Rheological evaluations have become indispensable instruments for characterizing final chocolate, forecasting product efficiency and consumer acceptance. During production, the different steps depend on a well-defined viscosity and yield stress.

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Pre-crystallization is an important step in the production of chocolate, which is defined as tempering of cocoa butter through primary and secondary nucleation. The goal of tempering is to obtain a sufficient amount of β polymorph of the right size. The pre-crystallization process has a great impact on the quality and production cost of final product.

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Background: Wheat germ (WG) is a valuable by-product of the commercial milling industry and is used as a functional ingredient in various foods. Therefore, in this study, it is aimed to utilize defatted wheat germ (DWG) (1%, 3%, 5%, 10%) in chewing gum formulation, which is a different food matrix besides the conventional structures, and investigate the release kinetics of phenolics from DWG incorporated chewing gums with a new centrifugation method.

Results: According to the results, it was observed that DWG was a good source of total phenolics (2254.

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In this study, dark chocolate enriched with EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) was developed using various forms and origins. Quality characteristics such as physical, thermo-gravimetric, rheological, textural and sensory properties of chocolates were investigated. The highest EPA/DHA stability was determined in samples prepared by free-flowing powder and microencapsulated forms of omega-3 fatty acids (FA).

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