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    Determination of hydroxymethylfurfural and malondialdehyde amounts in various instant coffees commonly sold in Türkiye
    (Elsevier, 2024) Gurbuz, Murat; Ede-Cintesun, Elif; Demir, Busra; Beceren, Yavuz; Ugur, Halime; Catak, Jale; Yaman, Mustafa
    Coffee is currently one of the most consumed non-alcoholic beverages around the world. Although many beneficial compounds are present in the composition of coffee, it should be taken into account that coffee products may contain some toxic substances. The aim of this study is to determine both 5-hydroxymethylfurfural (HMF) and malondialdehyde (MDA) levels of the most well-known coffee brands in T & uuml;rkiye and to discuss the factors associated with the increase of these toxic compounds in coffee products. In this research, 30 instant coffee samples were obtained from common commercial markets in Istanbul, T & uuml;rkiye. The amounts of HMF and MDA in these coffees were determined by high-performance liquid chromatography (HPLC). The amounts of HMF and MDA in the coffee samples ranged from 2.8 to 1595 mg/kg and from 17.5 mu g to 212 mu g/100 g, respectively. There was no significant relationship between the declared amount of added sugar and the analyzed amount of HMF. The amounts of both HMF and MDA, or either HMF or MDA were generally higher in coffee products with high non-dairy coffee creamer content (82 -85 %). The present study provides remarkable findings about the quality of coffee products commonly sold in T & uuml;rkiye.
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    The Bidirectional Association between Internet Use, Sleep Quality and Eating Behavior: A Cross-Sectional Study in Northwestern Thrace Region in Türkiye
    (Routledge Journals, Taylor & Francis Ltd, 2024) Gurbuz, Murat; Bayram, Hatice Merve
    ObjectiveThis study aimed to examine the complex associations between Internet addiction, sleep disturbances, and disordered eating behaviors.MethodsThis cross-sectional study included 646 students from 17 high schools in Edirne, T & uuml;rkiye between December 2023 and May 2024. A face-to-face questionnaire was administered to assess demographic characteristics, Internet addiction (YIAT), sleep quality (PSQI), and eating behavior (TFEQ-R21).ResultsIn total, 644 students completed the study. The prevalence of Internet addiction among adolescents was 16.3%, with a similar prevalence among male and female adolescents. The prevalence of poor sleep quality among adolescents was 6.4%, and this trend was more pronounced in male adolescents, with an incidence of 13.0%. A weak positive correlation was observed between Internet addiction and disordered eating behavior. Additionally, a moderate positive correlation was observed between poor sleep quality and disordered eating behavior. Gender, maternal education level, Internet addiction, and poor sleep quality were significant predictors of eating disorders in adolescents.ConclusionThe findings of our study are of significant value in providing insights into the development of programs designed to prevent undesired eating behaviors