Diagnostic accuracy of a clinical diagnosis of idiopathic pulmonary fibrosis: An international case-cohort study

We conducted an international study of idiopathic pulmonary fibrosis (IPF) diagnosis among a large group of physicians and compared their diagnostic performance to a panel of IPF experts. A total of 1141 respiratory physicians and 34 IPF experts participated. Participants evaluated 60 cases of interstitial lung disease (ILD) without interdisciplinary consultation. Diagnostic agreement was measured using the weighted kappa coefficient (\u3baw). Prognostic discrimination between IPF and other ILDs was used to validate diagnostic accuracy for first-choice diagnoses of IPF and were compared using the Cindex. A total of 404 physicians completed the study. Agreement for IPF diagnosis was higher among expert physicians (\u3baw=0.65, IQR 0.53-0.72, p20 years of experience (C-index=0.72, IQR 0.0-0.73, p=0.229) and non-university hospital physicians with more than 20 years of experience, attending weekly MDT meetings (C-index=0.72, IQR 0.70-0.72, p=0.052), did not differ significantly (p=0.229 and p=0.052 respectively) from the expert panel (C-index=0.74 IQR 0.72-0.75). Experienced respiratory physicians at university-based institutions diagnose IPF with similar prognostic accuracy to IPF experts. Regular MDT meeting attendance improves the prognostic accuracy of experienced non-university practitioners to levels achieved by IPF experts

Uranium adsorption characteristic and thermodynamic behavior of clinoptilolite zeolite

WOS: 000231471500003Natural zeolite, clinoptilolite was tested for its ability to remove uranium from aqueous solutions. Influence parameters to the sorption process, such as initial uranium concentration, pH, contact time and temperature were investigated. Distribution coefficients of uranium on clinoptilolite were measured by batch technique. Experimental isotherms evaluated from the distribution coefficients were fit to Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models. Values of Delta H and Delta S were found as 0.93 and 56.09 J/mole, respectively. It was observed that the adsorption process is endothermic. Kinetics of uranium sorption was investigated at different time intervals at 30 degrees C. The reaction rate and diffusion constant were calculated

Preparation of composite adsorbents and their characteristics

WOS: 000232530000014Composite adsorbents were prepared and tested for their ability to remove UO22+ in aqueous solution. Synthetic zeolite (zeolite-X) and natural zeolite (clinoptilolite) as an active component were mixed with polyacrylonitrile (PAN) solution as a binder to form the PAN-zeolite-X (composite-X) and PAN-clinoptilolite (composite-C) composite adsorbents. Optimum preparation conditions for the composites were determined. Effects of various parameters on the preparation of the composites were investigated. Each of the prepared composite adsorbents was treated with UO2(NO3)(2)center dot 6H(2)O and Th(NO3)(4)center dot 4H(2)O in aqueous solution to determine their sorption capacities. It was found that both composites have about four times higher thorium than uranium uptake capacity. XRD-diffraction patterns were obtained for zeolite-X, composite-X, clinoptilolite and composite-C. Surface area and cation exchange capacities (CEC) were also determined for both composites

Gross alpha-particle activities in the ground waters in Western Anatolia

WOS: A1996UZ29700015PubMed ID: 8759158The purpose of this study is to present data on gross alpha-particle activity, pH and conductivity in the ground waters in Western Anatolia. The gross alpha-particle activities in 27 ground water samples were determined by radiochemical carrier-precipitation methods. The gross alpha-particle activities of water samples were measured by using a ZnS (Ag) detector system. Measurable alpha-particle activity is present in all ground water samples, with one ground water sample having a gross alpha-particle activity > 0.55 Bq/L. Copyright (C) 1996 Elsevier Science Lt

Gross ?-particle activities in the ground waters in Western Anatolia

PubMed ID: 8759158The purpose of this study is to present data on gross ?-particle activity, pH and conductivity in the ground waters in Western Anatolia. The gross ?-particle activities in 27 ground water samples were determined by radiochemical carrier-precipitation methods. The gross ?-particle activities of water samples were measured by using a ZnS (Ag) detector system. Measurable ?-particle activity is present in all ground water samples, with one ground water sample having a gross ?-particle activity > 0.55 Bq/L.The purpose of this study is to present data on gross ?-particle activity, pH and conductivity in the ground waters in Western Anatolia. The gross ?-particle activities in 27 ground water samples were determined by radiochemical carrier-precipitation methods. The gross ?-particle activities of water samples were measured by using a ZnS (Ag) detector system. Measurable ?-particle activity is present in all ground water samples, with one ground water sample having a gross ?-particle activity > 0.55 Bq/L

Distribution of uranium on zeolite X and investigation of thermodynamic parameters for this system

Actinides-97 Conference -- SEP 21-26, 1997 -- BADEN BADEN, GERMANYWOS: 000074686200166The sorption of U(VI) from aqueous solutions on zeolite X has been studied by a batch technique. Distribution coefficients (K-d) were determined for sorption systems as a function of sorbate concentration, pH, contact time and temperature. The sorption isotherm was formed according to the Langmuir isotherm. Thermodynamic parameters have been determined at different temperatures. The Delta H degrees values for U(VI) on zeolite X were -29.5147 kT mol(-1) at 313 K at pH 3 and -19.8705 kJ mol(-1) at 303 K at pH 9. The sorption of U(VI) on zeolite X is an exothermic in nature. Negative values of Delta G degrees show the spontaneous values for U(VI) that become less negative at higher temperatures, which shows that sorption is less favoured at higher temperatures. (C) 1998 Elsevier Science S.A