http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13716 Thu, 23 Apr 2026 08:28:43 GMT 2026-04-23T08:28:43Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13747 Vitamin and fatty acid composition of P. eryngii var. eryngii Akyüz, Mehmet; Kırbağ, Sevda; Karatepe, Mustafa; Güvenç, Mehmet; Zengin, Fikriye In this study, fatty acid and vitamin contents of P. eryngii var. eryngii grown on various agro-residue were determined. The distribution of oil acid in 100 g lipid extracted from samples were found to be 0.00-0.59 g C14:0, 0.00-1.68 g C15:0, 13.56-20.09 g C16:0, 0.00-4.98 g C16:1, 0.00-0.22 g C17:1, 1.35-5.41 g C18:0, 10.77-34.80 g C18:1, 33.06-70.39 g C18:2, 0.00-1.17 g C18:3, 0.00-0.53 g C20:0, 0.00-0.59 g C20:2, 0.00-0.25 g C20:1, 0.00-4.14 g C20:3, 0.00-0.51 g C20:5, 0.00-1.15 g C22:0, 0.00-0.30 g C22:1, 0.00-3.54 g C22:2, 0.00-0.33 g C22:4, 0.00-1.15 g C22:5, 0.00-3.93 g C22:6 and 0.00-2.07 g C24:0, of wet weight. The contents of vitamin were 0.014-0.064 A, 0.869-3.565 E, 55.980-473.405 C and 0.087-5.619 MDA mg/kg of wet weight. It has been determined that P. eryngii var. eryngii is rich from the point of view of unsaturated fatty acids such as linoleic acid, oleic acid and palmitic acid, and especially vitamins C, also antioxidants vitamins such as vitamin A, E and MDA. Sat, 01 Jan 2011 00:00:00 GMT http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13747 2011-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13746 A theoretical analysis of the 6He + 9Be reaction: phenomenological and double folding model approximations Aygün, Murat; Boztosun, İsmail We investigate the elastic scattering data of the 6He + 9Be reaction by using the phenomenological and double folding model potentials within the framework of the optical model. In the phenomenological calculations, we use the optical model parameters existed in literature to explain 6He + 9Be reaction. The real potentials in double folding calculations are obtained by using two different density distributions of 6He nucleus. For both the phenomenological and double folding model calculations, the imaginary potentials have the shape of the Woods-Saxon volume. We compare the phenomenological model results with the double folding model ones as well as the experimental data. We present that the folding model results are in better agreement with the experimental data than the phenomenological results for the 6He + 9Be reaction. Sat, 01 Jan 2011 00:00:00 GMT http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13746 2011-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13745 An experimental study on relationship between hammett substituent constant and electronic absorption wavelength of some azo dyes Gülseven Sıdır, Yadigar; Sıdır, İsa; Berber, Halil; Taşal, Erol In this study, absorption spectra of sixteen azo dyes have been recorded in various solvents. These azo dyes have substituents such as OH, SO3H, Cl, I, NO2, C2H5 and OCH3 in different positions of phenyl ring. There is a shift in λmax whose amount is dependent upon the type and position of substituent on the ring. The effects of substituent on the absorption spectra of azo dyes are interpreted by correlation of absorption maximum wavelengths (nm) with the hammett substituent parameters. Charge transfer transitions are observed in inverse direction for azo dyes with electron acceptor substituent compared to azo dyes with electron donor. Sat, 01 Jan 2011 00:00:00 GMT http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13745 2011-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13744 Metal spherical nanostructures and dielectric response quantum-size effects in silver nanoclusters Köksal, Koray; Pavlyukh, Yaroslav; Berakdar, Jamal The change of the quantum dielectric response of metal clusters has been investigated by tuning their size and topology. In order to calculate the change, analytical and numerical methods have been used. Results are presented for silver metal spheres. We have discussed possible ways for the experimental verification on the basis of scanning tunneling spectroscopy (STM) (Limot et al. 2005) or electron energy loss spectroscopy (EELS) (Eccles et al. 2010). Sat, 01 Jan 2011 00:00:00 GMT http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13744 2011-01-01T00:00:00Z