Dursun, A.; Öztürk, H.I.

This study was carried out to determine the genetic diversity based on the morphological characteristics of pinto and fresh bean germplasm. In the study, 70 local pinto and fresh bean genotypes collected from Erzincan and four commercial varieties were used as control. Twelve bean genotypes (5 pinto bean and 7 fresh bean genotypes) having string pod and inadequate seed were removed from the study in the first year. In the second year of the experiment, 58 genotypes were used and morphological characteristics were determined in these genotypes. All genotypes involved in the study showed different characteristics in terms of all morphological features. According to the cluster analysis, genotypes were divided into 3 groups. In the three groups, the first cluster includes 11.29% of total genotypes, second cluster including 37.1% of total genotypes and third cluster including 51.61% of total genotypes. The highest genetic distance was determined between ULU-44 and ÇYR-32 genotypes. Genotypes with different vegetative and generative characteristics were found in different groups.

Gürses, Ahmet; Doǧar, Çetin; Açikyildiz, Metin; Özkan, Esra; Bayrak, Ramis

Activated carbon, produced from dogrose (Rosa section Caninae) seeds, was used for the removal of methylene blue (basic dye). Adsorption studies were carried out at 20°C and 40°C at various initial dye concentrations (20, 40, 60, 80, and 100 mg/L) and at different lengths of time (15, 30, 60, and 120 min). Adsorption isotherms of the basic dye on the prepared adsorbent were determined and correlated with common isotherm equations. Fitting of the isotherm data to the BET adsorption isotherm model was better in high concentration ranges than in the other models. Thermodynamic parameters such as change in isosteric adsorption enthalpy (ΔH)y and isosteric adsorption entropy (ΔS)y were also determined to 40.8 kJ and 0.141 kJ, respectively. It was concluded that the adsorption of methylene blue increases with increasing temperature. BET model fitting indicates that the hydrophobic interactions between the dye and the produced active carbon at the first layer and the dipole-dipole interactions between methylene blue molecules and the adsorbed molecules at the secondary layer predominate. To investigate the adsorptive characteristics of the produced active carbon, porosity and BET surface area measurements were made.