Diğer Yayınlar Koleksiyonu
Bu koleksiyon için kalıcı URI
Güncel Gönderiler
Öğe Heavy metals in wetlands in Turkey(Springer Science and Business Media B.V., 2021) Türker, Onur Can; Vymazal, JanWetland areas are one of the most precious ecosystem because they contain rare ecological assets. The total area of wetlands of Turkey is 9.861 km2 and wetlands cover 1.2% of total area of Turkey. Unfortunately, most wetland areas of Turkey face great challenges due to various pollution factors including heavy metals pollution caused by rapid industrialization and urbanization. In this chapter, current heavy metal pollution status of wetland areas, especially Ramsar Sites in Turkey, was assessed by more than 60 articles dealing with concentrations of heavy metals in sediment, water, and aquatic organisms. The results from the literature demonstrated that anthropogenic activities were closely related to heavy metal pollution causing a significant threat to wetlands including some Ramsar sites. In this respect, Ramsar areas of Lake Uluabat and Gediz Delta were severely contaminated by heavy metals. Moreover, heavy metal pollution in other Ramsar sites such as Kızılırmak Delta, Sultan Marshes, Lake Manyas, Lake Burdur, and Seyfe Lake had moderate levels. Low potential heavy metal pollution risk was reported for a Ramsar site of Akyatan Lagoon. On the other hand, high levels of heavy metals were found in various wetland areas of Turkey, and heavy metal concentrations in water of Lake Hazar, Yeniçağa Lake, Terkos Lake, and Beyşehir Lake were higher than the permissible levels for drinking water suggested by WHO (World Health Organization). Plankton, zoobenthos, and fishes which lives in polluted wetland habitats had also higher concentrations of heavy metals in their tissues, and thus heavy metal pollution can pose a potential risk for food chain both in wetland and terrestrial ecosystems of Turkey.Öğe Lantibiotics nanotechnology, bioengineering, and biotechnology(Springer Science and Business Media B.V., 2021) Şam, Mesut; Sağlam, Semran; Altındağ, Serap; Köse, Kazım; Emül, Ezgi; Uzun, Lokman; Sağlam, NecdetThe term “antibiotics” refers to antibacterial agents synthesized by certain lactic bacteria. These microorganisms produce antibiotics to prevent pathogens from settling in the same environment and to prevent pathogens’ nourishment. Lantibiotics are antimicrobial peptides produced by most gram-negative and gram-positive bacteria. These bacteriosins are called LANTIBIOTIC and present themselves as an interesting addition to the “traditional” antimicrobials when the use of antibiotic resistance is compromised. Bacteriocins are antimicrobial components of protein structure that are synthesized and secreted by bacteria. Inhibition effects are observed mostly on neighbor species. Although there are many varieties with different properties, nisin, which is obtained from lactic acid bacteria, is safely and widely used in foods. Thus, knowing the properties of other bacteriocins along with nisin may enable the effective use of these antimicrobial agents in many food products.Öğe Antimicrobial activities of the essential oils of endemic Stachys rupestris and Stachys amanica against multi-resistant bacteria(Wolters Kluwer Medknow Publications, 2013) Uğur, Aysel; Saraç, Nurdan; Varol, Ömer[Abstract Not Available]Öğe Photoacoustic analysis and imaging techniques: Sound of light(Taylor & Francis, 2018) Tan, GamzeAn unusual form of imaging and analysis applications combines optics and acoustics to probe the features and behaviors of materials. The name of photoacoustic like all other techniques of spectroscopy reveals underlying its theoretical basis. Even if the prefix "photo" makes sense for a spectroscopy, acoustic may be initially amazing. Photoacoustic technique is extension of the photothermal effect, which is based on light beam hitting the sample and altering its thermal status. More precisely, photoacoustic effect is a transformation between light, heat, and sound caused by light absorption. After the successful formulation of general theoretical model, photoacoustic technique, which initially was only used for the analysis of gas samples, has been efficiently extended to analysis of condensed matters. Variety of samples, nondestructive analysis and imaging, depth profiling, high specificity and sensitivity, analysis of opaque samples are the most important advantages of photoacoustic technique. As of today, many researchers have performed in vitro and in vivo analysis and imaging application using photoacoustic technique; moreover, increasing number of companies are manufacturing biomedical imaging devices based on this effect. If the obstacles to experimental restrictions are removed, we will begin to hear the sound of light as more powerfully in many applications, particularly physics, materials science, and medicine.Öğe Bisphosphonates may retrieve endothelial function in vascular diseases similar to statins' effects(WILEY-BLACKWELL, 2008) Ural, Ali Uğur; Avcu, Ferit; Öztürk, Kamile[Abstract Not Available]Öğe Constructed wetlands for boron removal: A review(2014) Türker, Onur Can; Vymazal, Jan; Türe, CengizBoron (B) contamination in the environment still increases because of various natural sources and anthropogenic activities. Therefore, the problem of removing B from water becomes a worldwide concern due to its toxicity and chronic effects on plants, animals and human health. This situation has generated increasing interest in the use of several wastewater treatment technologies in order to remove B from contaminated water. Constructed wetlands (CWs) present friendly alternative methods to treat wastewater around the world, and are used for removing various contaminants including metals and metalloids. This paper reviews current knowledge regarding the removal process of B, discusses application of B removal, and identifies critical knowledge study fields of future and gaps. Despite the fact that the sediment is a major sink for the removal of B, plants can play a significant role under favorable environmental conditions. The most important environmental factors that affect B removal in CWs are climatic conditions (e.g. transpiration rates), pH, temperature, solutions composition and competing species, hydraulic retention time and supporting media. Further research is needed on the major removal mechanism of B in CWs, namely the applicability of surface flow system, hybrid systems and vertical flow systems to remove B from wastewaters, the role of microorganism in order to enhance B removal efficiency. © 2014 Elsevier B.V.
