Yilmaz, E.; Ates, M.; Sahilli, Y. C.

Researches on nano-structured materials (<100 nm) are increasing rapidly in the direction of technological developments. Synthesis and modification of quantum dots, known as nanomaterials and nanocrystals, have become an important aspect of nanotechnology. The reason for this is that it has many potential applications in the field, including biomedicine and pharmacology. The unique properties and biological effects of nanostructured particles indicate that they can potentially be used as an alternative in the treatment of various diseases. In this work, PbSe quantum dots were synthesized by chemical method and modified by chitosan coating. The characterization of PbSe was done by TEM, SEM, XRD, DLS and Zeta potential analysis methods. When the morphological structures of the quantum dots obtained by chemical synthesis were examined, round and spherical nano-sized particles (<20 nm) of all PbSe were obtained according to TEM and SEM results. It has been seen that PbSe quantum dots have a positive (+) surface charge and are highly stable (40 + mV). In addition, the increase in oxidation resistance of PbSe coated with chitosan was found in XRD results. As a result of this research, small size and biopolymer coated and thus more stable quantum dots could be obtained. It has also been found that PbSe quantum dots coated with biopolymers like chitosan may have the potential to be used in pharmacology and biomedical applications.

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Ates, M.; Dugo, M. A.; Demir, V.; Arslan, Z.; Tchounwou, P. B.

Nanotechnologies research has become a significant priority worldwide. Many engineered nano-sized materials have been increasingly used in consumer products. But the adverse effects of these nanoparticles on the environment and organisms have recently drawn much attention. The present study investigated the effects of different concentrations of copper oxide nanoparticles (CuO NPs) on the sheepshead minnow (Cyprinodon variegatus) at different salinity regimes, since it is able to withstand a wide range of salinities. The results indicated that CuO NPs could cause behavioral changes in the fish, such as increased mucus secretion, less general activity and loss of equilibrium. No mortality was observed at the presence of CuO NPs during the experiments. But higher oxidative stress was determined at half strength seawater than seawater exposure medium, which can be associated with the decreasing toxicity of CuO NPs as salinity increases. In addition, Cu contents in the tissues of the fish were significantly higher (p<0.05) in the low salinity. The order of Cu accumulation in the fish's organs was intestine > gills > liver.

AtıfWoS25

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Kocabas, M.; Kayim, M.; Can, E.; Ates, M.; Kizak, V.; Kutluyer, F.; Demirtas, N.; Serdar, O.

In the present study, biometric characteristics and stomach contents of Salmo trutta (L., 1758), captured from Munzur stream in Tunceli, Turkey were investigated between September 2007 and December 2009. It was calculated that the age range were between 1 and 5 years old. Captured fish were measured 19.5 +/- 5.9 cm, 113.55 +/- 100.22 g (n = 120), respectively. The condition factor of trout calculated 1.14 +/- 0.20 (n = 120). At the end of study, the rations in total organism number were Decapoda (43.59%), Trichoptera (19.21%), Haplotaxidae (18.59%), Ephemeroptera (10.36%), Odonate (2.74%), Coleoptera (2.74%), Clitellata (2.43%) and Diptera (0.3%), respectively. The results indicated that the fish feed basically on Arthropoda and Annelidae.

AtıfWoS1

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