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Öğe Agar-plate screening for acid dyes decolourization by three strains of Pleurotus eryngii isolated from Tunceli, Elazig and Hakkari Province of Turkey(Chemical Publishing Co., 2010) Yildirim N.; Yildiz A.; Aydin H.Many synthetic dyes present in industrial wastewaters are resistant to degradation by conventional treatments. In this study, the ability to decolourize two textile dyes by Pleurotus eryngii strains collected from geographically different habitats of Turkey was evaluated on agar plates. For all strains, growth and decolourization halos were determined on malt extract agar plates containing 0.1 and 0.2 g/L of acid red 183 or acid green 25. Each P. eryngii strain showed certain decolourization capacities and was able to decolourize both acid red 183 and acid green 25 on the malt extract agar plates, but not to the same extent. Both dyes at all concentrations were found to be toxic for P. eryngii growth. The presence of the dyes in plates reduced the mycelial growth of all strains in comparison with the control culture growing in the medium without dyes. A positive correlation was found between the mycelial growth rate and the decolourization ability.Öğe Copper and zinc contamination of the Tigris River (Turkey) and its wetlands(2001) Gümgüm B.; Ünlü E.; Akba O.; Yildiz A.; Namli O.Copper and zinc were determined in the water and freshwater fish (Carasobarbus luteus) from the Tigris River, and its surrounding soils, wheat and mushrooms by using a Jobin Yvon model 24 Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The average contents of Cu and Zn in the river water, were found 0.03 mg L-1 and 0.14 mg L-1, and in the liver of fish were found approximately 454 mg kg-1 and 290 mg kg-1 respectively. All Cu and Zn values in the soils that irrigated with the river water, were found higher than the non irrigated soils in the same area. The similar results were observed in wheat and mushrooms, that near or far from the river.Öğe The effect of ferrum (FeSO4) on culture mushroom: Pleurotus ostreatus (Jacq.) Kumm.(2006) Yildiz A.; Yeşil Ö.F.This study was conducted on the growth, ratio of protein and cultivation of Pleurotus ostreatus on local celluosic wastes in different concentrations of the ferrous (Fe++). It was observed that Fe++ had effect on the formation and growth of the basidiocarps. The shortest and longest period of basidiocarps formation and growth were obtained in 100 ppm and 300 ppm Fe++, respectively. The higher total amount of yield was found for 100 ppm Fe++ when compared with control, 200 and 300 ppm Fe ++. Significant (P < 0.05) difference was found between the control and 100 ppm Fe++, but the best yield was obtained. Mushroom protein ratio of all concentrations of ferrous (Fe++) were found to be lower than control. © TÜBİTAK.Öğe Effect of sleep quality on hemodynamic response to exercise and heart rate recovery in apparently healthy individuals(The Canadian Society for Clinical Investigation, 2014) Yuksel M.; Yildiz A.; Demir M.; Bilik M.Z.; Ozaydogdu N.; Aktan A.; Isik F.Purpose: Poor sleep quality has an unfavorable impact on autonomic nervous system activity, especially that of the cardiovascular (CV) system. The heart rate (HR) and blood pressure (BP) at rest and during exercise, along with the heart rate recovery (HRR), were examined in poor sleepers and compared with individuals with good sleep quality. Methods: A total of 113 healthy individuals were enrolled to the study. All participants performed treadmill stress testing. Sleep quality of participants was assessed by using the Pittsburgh Sleep Quality Index (PSQI) questionnaire: 48 subjects were categorized as 'poor sleepers' (PSQI score > 6 points), and the rest were grouped as 'good sleepers'. Results: The poor sleepers showed higher resting HR (p<0.001), higher diastolic BP (p=0.006), similar systolic BP (p=0.095), more frequent hypertensive response to exercise (p=0.046) and less HR increase with exercise (chronotropic incompetence) (p=0.002) compared with individuals who reported good sleep quality. In addition, the poor sleepers demonstrated reduced heart rate recovery at the 1st and 3rd minute of recovery (p=0.005 and 0.037, respectively) compared with good sleepers. Multivariate logistic regression analysis revealed that only resting diastolic BP was the independent predictor of HRE. The PSQI score was positively correlated with resting HR; while it was negatively correlated with HR response to exercise, HRR1 and HRR index-1. Conclusion: This cross-sectional study emphasizes the effect of poor sleep quality on unfavorable cardiovascular outcome indicators of the treadmill stress test. © 2012 CIM.Öğe Evaluation of three strains of pieurotus eryngii isolated from geographically different regions of turkey for their ability to decolorize methylene blue and chrystal violet(2010) Yildirim N.; Yildirim N.C.; Yildiz A.In this study, the ability to decolorize two chemically different synthetic dyes (methylene blue and crystal violet) by Pleurotus eryngii strains collected from geographically different regions of Turkey was evaluated on agar plates in static liquid cultures. For all strains, growth and decolorization halos were determined on malt extract agar plates containing 0.4 and 0.6 g/L of crystal violet (CV) or methylene blue (MB). Each P. eryngii strain showed certain decolorization capacities and was able to decolorize both MB and CV under static liquid culture conditions, but not to the same extent. The presence of the dyes in static liquid culture reduced the biomass production of all strains in comparison with control culture growing in the medium without dyes. In solid medium, a positive correlation was found between growth halo and decolorization halo. © by PSP.Öğe An experimental study on mycelial development period of some Pleurotus species, P. ostreatus, P. sapidus and P. sajor-caju, on the media that contain certain amount of barley crumb or wheat flour(1998) Akbayin H.; Yildiz A.; Ertekin A.S.Cultivation of Pleurotus species as mushroom is becoming important throughout the world because of their abilities to grow in a wide range of temperatures, on various types of medium and their shorter cultivation time. The purpose of this study is to determine whether the media that contain 1% malt extract and 1%, 1.5% or 2% wheat flour or barley crumb significantly decrease the mycelium development period of Pleurotus species, P. ostreatus, P. sapidus and P. sajor-caju, compared with the media that merely contains 1% malt extract and to establish which media is more appropriate to produce mycelia of these species vegetatively. As a result, of this study, the media that contain 1% barley crumb and 1% malt extract for P. ostreatus, 1.5% barley crumb and 1% malt extract for P. sapidus, and 1.5% barley crumb and 1% malt extract for P. sajor-caju has been suggested.Öğe Prognostic factors and in-hospital outcome of native valve endocarditis in Turkey. A multicenter study(Acta Medica Mediterranea, 2014) Ata Akil M.; Acet H.; Elbey M.A.; Aydin M.; Bilik Z.; Yildiz A.; Yuksel M.Aim: To investigate the predisposing factors, demographic and clinical characteristics, echocardiographic and prognostic features, and outcomes of patients with native valve infective endocarditis (IE) in Turkey in a multicenter based study. Materials and methods: The study population consisted of 158 consecutive patients with native valve IE (NVE). Data on demographics, medical history, medications, clinical procedures, predisposing factors, clinical examination, microbiology, antibiotic therapy, echocardiography, surgery, complications, and outcome were collected and compared. Results: The mean age of the patients was 47±19 (range 13-87). Seventy seven patients (49%) were female. Of the 158 NVE patients, 49 died during hospitalization. Mortality rate was 31%. Twenty eight patients experienced a stroke. The patients who died during hospitalization were significantly older than the survivors and had higher mean heart rate, white blood cell, C reactive protein, creatinine, poor NYHA functional class, multiple vegetations and large vegetations. Culture-negative endocarditis was seen in 54 cases (34%). Staphylococci were the most common causative organisms (28%). Eighty patients had undergone surgical treatment (51%). Hemoglobin, presence of multiple vegetation, vegetation size (>10 mm), septic shock and poor NYHA class on admission were independent risks for in hospital mortality and stroke. Beside these variables C reactive protein was also an independent risk for in hospital mortality Conclusion: Native valve IE in Turkey was associated with high in-hospital mortality. Rheumatic heart disease continues to be the most common underlying heart condition and echocardiographic findings on admission were the most important independent predictors of mortality or stroke.
