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    The effects of heat application on the quality of golden delicious and starking delicious apple varieties
    (2006) Ekinci N.; Çelik S.
    The objective of this study is to determine the effects of heat applications on fruit quality during the storage. Golden Delicious and Starking Delicious apple varieties used in this research were obtained from the Vineyard Research Institute located in Tekirdag. Research was carried out with three replications in randomized block design with split plots. Apples were treated with heat for 4 days at 38°C and then stored in Institute's cold air chambers under the conditions of 0°C with 85-90% relative humidity. During the heat application high weight loss occurred in fruits. This application was found to be effective on the firmness of the fruits during storage. The mean application was responsible of ripening by increasing the respiration rate and the starch degradation rate in fruits. © 2006 Asian Network for Scientific Information.
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    Microplastics and endocrine-disrupting chemicals released from disposable hot beverage cups and from teabags, and their evaluation in terms of human health safety
    (Polish Society Magnesium Research, 2024) Tabakoglu N.; Sezer K.; Çelik S.
    Microplastics (MPs) are pollutants that contaminate resources such as water, air, and soil. Humans can be exposed to microplastics through inhalation, digestion, or dermal contact. The use of disposable paper and plastic cups, as well as teabags, is widespread. Cups are usually made of plastic, and teabags are generally made of half-synthetic cellulose. This study aims to draw attention to their effects on human health by analyzing MPs due to contact with plastic paper cups and teabags with a hot aqueous solution (50°C, 70°C, and 90°C). This study used scanning electron microscopy (SEM), high-performance liquid chromatography, and mass spectrometry (LC-MS/MS), and the results were confirmed by Fourier transform infrared spectroscopy (FTIR). The number of MP particles released from teabags increased to 4.59 x 104 particles cm-3, while in paper cups and plastic cups, MP particle numbers elevated to 2.94 x 104 particles cm-3 and 2.11 x 104 particles cm-3, respectively. Total phthalate compound concentrations determined in aqueous solution samples were 1.74-2.42 µg dm-3 in teabags, 1.49-2.40 µg dm-3 in paper cups, 1.20-1.28 µg dm-3 in plastic cups; Bisphenol A concentration ranges were determined as 0.015-0.045 µg dm-3 in plastic cups, 0.006-0.011 µg dm-3 in teabags and 0.005-0.006 µg dm-3 in paper cups. Consumption of tea or coffee that comes into contact with disposable plastics daily may increase the daily MP intake and cause health problems in the future. © 2024, Polish Society Magnesium Research. All rights reserved.