The aim of this study was to compare the morphological changes that occurred in root cementum layers due to periodontal disease by using scanning electron microscopy (SEM). Ninety-two periodontally hopeless teeth extracted from 29 patients were studied. Measurements of probing depth (PD) and clinical attachment loss (CAL) were taken prior to extractions. After the longitudinal fracturing process of root specimens, healthy and diseased cementum layers of roots were evaluated by SEM for the thickness of the cementum and the morphological changes in collagen fibers. The result of SEM evaluation revealed a significant ( P < 0.001) decrease in the thickness of cementum layer on the diseased root surfaces compared to the healthy surfaces. There were denser and conspicuous collagen fibers with their interfibrillar matrix in cementum layers on the healthy root surfaces compared to the diseased surfaces. Within the limits of this study, the thickness of cementum layers in diseased areas was found to be significantly less than that in the healthy areas of root surfaces. However, there exist variations in the density and visibility of cemental fibers between individuals and within the individual.

Bursa, the first capital city of Ottoman Empire, was inscribed into UNESCO World Heritage List in 2014 with Khans Area, Sultan Complexes (Kulliyes) and Cumalıkızık village representing the relationship between urban and rural areas of Early Ottoman Period. Cumalıkızık Village is one of the most popular rural settlements in Bursa which maintains its urban fabric, road pattern, and traditional houses. Under the pressure of increasing tourism, traditional houses began to be used for commercial purposes with the interventions made by their owners which threatens the sustainability and preservation of their authenticity and integrity. This paper aims to determine the interventions in historic dwellings and courtyards due to tourism. For this purpose, three historic houses on the most visited sightseeing route starting from the village square, continuing along the nodes of the settlement following the mosque and the hammam (public bath) to examine the physical changes under the effect of tourism. Keywords: cultural tourism; rural heritage; world heritage sites; Cumalıkızık; Bursa

The integration of information technologies with industry has marked the beginning of the Fourth Industrial Revolution, which is called Industry 4.0 for short. The technologies of this era have been transforming not only the industry itself but also reshaping individuals and society. One cannot deny the very positive outcomes of Industry 4.0; however, it has also given rise to some environmental problems, including changes in climatic conditions, the running out of resources due to increasing amounts of production, industrial wastes, all of which pose irreversible threats to nature. These negative outcomes have mobilized individuals, non-governmental organizations and states requiring companies to reform the operation of supply chains in line with the sustainability principle of "meeting today's needs without compromising the ability of future generations to meet their own needs". The purpose of the current study is to present how Industry 4.0 might influence the functioning of the sustainable supply chain and the benefits it might bring. First, industrial revolutions, the concept of Industry 4.0 were introduced briefly. Then, the trends in supply chain management and with reference to sustainability and the possible contributions of Industry 4.0 to sustainability were discussed.

Cryogels are synthetic polymers used in adsorption experiments in recent years. Because of their macropores, they provide an excellent advantage as an adsorbent in continuous and batch adsorption processes. In this study, nicotinamide (NAA) decorated poly(2-hydroxyethyl methacrylate-glycidyl methacrylate), poly(HEMA-GMA), cryogels were synthesized. Heavy metal adsorption was carried out in wastewater obtained from six different sources in Çorum, Turkey. This study has a novelty regarding the application, i.e., it is the first time to use a polymeric adsorbent for the removal of 15 different heavy metal at the same time without any competition (despite the fact that there is a competition between the metals, the only thing is the removal regarding the purpose the study) as a heavy metal sweeper. Inductively coupled plasma-mass spectrometer (ICP-MS) was used for the determination of the initial amount of heavy metal in the wastewater samples. Adsorption studies were performed using poly(HEMA-GMA) and NAA-decorated poly(HEMA-GMA) cryogel to see the effect of NAA decoration. Higher adsorption capacity was achieved using NAA decorated poly(HEMA-GMA) cryogel. The total heavy metal amount adsorbed from six different sources was about 686 and 387 mg for poly(HEMA-GMA)-NAA and poly(HEMA-GMA) cryogels, respectively. The highest heavy metal adsorption value was obtained in the wastewater from source 2, and Zn (II) was the heavy metal adsorbed most for both cryogel. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermal, surface area, elemental, and computerized microtomography (μCT) analyses were used for the characterization of cryogels.

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