Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Book Part Developments in Antimicrobial Food Packaging From Zein Incorporating Natural Active Agents(Elsevier, 2025) Yemenicioğlu, A.In this chapter, the current developments in using zein for antimicrobial food packaging have been discussed with particular emphasis on incorporated natural active agents. Although zein could be incorporated with antimicrobial enzymes and peptides, incorporation of phenolic compounds, essential oils, and organic acids into zein packaging have gained a particular interest as these natural antimicrobial agents also help reducing classical brittle nature of zein films. The composites or blends of zein with lipids and fatty acids still maintain their importance as antimicrobial films having sustained release properties. However, recent developments have also addressed different benefits of using zein nanofibers, nanoparticles, and nanoemulsions in packaging. Moreover, zein has also become a promising material to obtain antimicrobial electrospun mats. This chapter discusses not only traditional antimicrobial zein films and coatings, but also recently developed zein-based antimicrobial materials. © 2025 Elsevier Inc. All rights reserved.Article Design and Performance of SiOC Foam-Silica Aerogel Composites for Hot and Cold Thermal Management Applications(Elsevier Ltd, 2025) Icin, Oyku; Vakifahmetoglu, CekdarThis study focuses on the fabrication of monolithic preceramic polymer-derived ceramic (SiOC) foam-silica aerogel composites by filling the open cells of ceramic foam with a silica aerogel solution using the sol-gel technique. The effects of different drying techniques (ambient pressure vs CO2 supercritical drying) and surface modification agents, including trimethylchlorosilane (TMCS) and hexamethyldisilazane (HMDZ), are comprehensively investigated. These factors are analyzed for their influence on the composites' morphology, porosity, chemical structure, and thermal insulation performance. The drying technique and surface modification agents are found to play a critical role in achieving a high filling ratio of silica aerogel within the composites. Pure silica aerogels exhibit specific surface areas (SSAs) reaching similar to 1120 m(2).g(-1), while the SiOC foam-silica aerogel composites demonstrate SSAs of 385-440 m(2).g(-1). Nearly all samples achieve a total porosity of similar to 93 vol%. Surface modification effectively tailors the surface properties, imparting hydrophobicity with a water contact angle of 133 degrees. Thermal conductivity at room temperature ranges between 38 and 43 mW<middle dot>m(-1)<middle dot>K-1. The potential applications of these SiOC foam-silica aerogel composites as thermal insulators are assessed under extreme thermal conditions. For instance, a 14 mm thick composite has a temperature of -27 degrees C when subjected to a cold source at -78 degrees C. Instead, when exposed directly to a butane flame (similar to 1200 degrees C), the backside of the composite recorded only similar to 57 degrees C.Article Citation - Scopus: 10Development of Lightweight Geopolymer Composites Containing Perlite and Vermiculite(International OCSCO World Press, 2023) Korniejenko, Kinga; Pławecka, Kinga; Bulut, Alperen; Şahin, Baran; Azizağaoğlu, Göksu; Figiela, BeataPurpose: The aim of this work was to prepare and characterise geopolymer composites containing lightweight aggregates-perlite and vermiculite. Design/methodology/approach: The geopolymer matrix was prepared on the basis of fly ash, sand and a 6M sodium hydroxide solution with sodium silicate. The properties of the materials were tested 28 days after the preparation of the samples. The following research methods were used to characterise the composites: compressive and flexural strength tests, microstructural tests using a scanning electron microscope, and thermal conductivity were measured. Findings: The results obtained showed a slight effect of the additives on the strength properties. Lightweight aggregates are characterised by good coherence with the matrix material. Their addition allowed to reduce the density and lowered the thermal conductivity of the materials. The results obtained indicate that the proposed additives can improve the properties of the geopolymer composite for use in the construction industry. Research limitations/implications: Further research should focus on geopolymer composites with perlite and involve fire-resistant and water-absorption tests. Practical implications: The production of lightweight building materials brings a number of benefits, such as reducing the density of building elements and, at the same time, the entire structure, which results in a reduction in their weight, as well as lower transport costs. Such elements have better thermal and acoustic insulation, reflected in the parameters of buildings. An additional advantage is the reduced environmental impact through better insulation properties, lower fuel consumption during transport, etc. Originality/value: The density of the material can be reduced by using lightweight aggregates or obtaining porous material in the foamed process. In the case of geopolymer composites, a number of studies related to foamed materials have been provided, but there is only a few previous research connected with lightweight aggregates such as perlite and vermiculite. © by International OCSCO World Press. All rights reserved. 2023.Article Citation - WoS: 10Citation - Scopus: 10Comparison of the Rermineralisation Effect of a Glass Ionomer Cement Versus a Resin Composite on Dentin of Primary Teeth(Ariesdue Srl, 2014) Aykut-Yetkiner, A.; Simsek, D.; Eronat, C.; Ciftcioglu, M.Aim The aim of this study was to investigate the interaction of a high viscosity glass ionomer cement (G/C) and a composite resin with caries affected dentin and to determine the remineralization levels. Materials and Methods In a split Mouth deSign 24 GIC and composite resin atraumatic restorative treatment restorations were made in vivo and the teeth were collected after 2 years and subsequently settioned and examined using Vickers microhardness test; the latter was performed starting from the dentin surfate adjacent to the restoration. Repeated Measure ANOVA and Bonferroni Statistical methods were used for data analysis. Results The micrdhardness adjacent to the GIC reStorative material resulted tube significantly higher. Conclusion GIC resulted to be a better restorative material for the remineralization of caries affected dentin, though further studies are necessary for the corroboration of this finding. The GIC restored primary molar dentin had a higher level of remineralizatiOn and GIC could be the material of chdice in pediatric dentistry.