The crystalline phases of S 2 O 8 2− /Al- x wt%Ce–Zn–O solid acid catalysts were determined by the X-ray powder diffraction (XRD) (X’Pert PRO DY2198 diffractometer), using Ni-filtered Cu K α radiation (λ = 1.5406 Å) at
Authors:G. García-Rosales, E. Ordoñez-Regil, J. Ramírez Torres, J. López Monroy, M. Machain-Castillo, and L. Longoria-Gándara
This study deals with the characterization of a marine sediments profile from the Gulf of Tehuantepec, Mexico. Ten sediment
samples obtained from a core of 18.3 m of length were analysed. Although there have been numerous marine sediments studies
carried out in Mexico, more are needed to better understand the sea floor formation. Crystallographic, morphologic, physical,
chemical and gamma ray activity analysis were carried out on the samples. The analysis results showed a decrease in organic
matter content as a function of sea depth; this value is related to the specific surface area. Some hazardous materials as
Cr, Mn, Ni, Sr and Hg were also identified by PIXE in some samples, probably due to anthropogenic activity. The presence of
uranium a naturally occurring element was found in all the samples, suggesting a migration through all materials of strata,
radioactive elements such as 226Ra, 235U, 212Pb, 214Pb, 228Ac, 208Ti, 214Bi, 228Ac and 40K were detected.
Authors:A. Kohutova, P. Honcova, V. Podzemna, P. Bezdicka, E. Vecernikova, M. Louda, and J. Seidel
Thermal decomposition and structural characterization of three human kidney stones (KS1–KS3) extracted from patients of Eastern
Bohemia have been carried out using X-ray powder diffraction systems (XRD), scanning electron microscope with energy dispersive
X-ray micro analyser (SEM-EDX) and differential thermal analysis (DTA). The samples KS1 and KS2 solely consisted of calcium
oxalate monohydrate (a.k.a. whewellite, CaC2O4·H2O). The third sample, KS3, was formed from calcium oxalate dihydrate (weddellite, CaC2O4·2H2O), calcium oxalate monohydrate, and hydroxyapatite (HA, Ca10(PO4)6(OH)2). Thermal measurements were carried out in the range between room temperature and 1,230 °C. XRD analysis was utilized to
investigate the change of phases at 800 and 1,230 °C.
Authors:Sebastián Vecino Mantilla, Álvaro Mancilla Manrique, and Paola Gauthier-Maradei
, Pyrolysis Oils: Characterization, Stability Analysis, and Catalytic Upgrading to Fuels and Chemicals , University of Massachusetts, 2011 ; http://scholarworks.umass.edu/open_access_dissertations/349.
Authors:S. Janarthanan, R. Sugaraj Samuel, Y. C. Rajan, and S. Pandi
characterization such as spectral, thermal, and NLO property studies show that S dl C is one of the new organic nonlinear optical crystals.
Experimental results and discussion
S dl C was synthesized from raw
Authors:P. R. Dametto, F. J. Caires, B. Ambrozini, and M. Ionashiro
characterization of some transition metal complexes of folic acid [ 4 ] and Processes to identify the degradation mechanism of a solid which appears to undergo a complex reaction: folic acid [ 5 ].
In this article, the object of the present research was to
Authors:Faheem Rizvi, Tanveer Bokhari, S. Roohi, and A. Mushtaq
Doxorubicin (DOX) is an anthracycline antineoplastic and one of the most potent and widely used drugs in clinical oncology.
It is used in the treatment of a wide variety of cancers. The aim of this study was the direct labeling of DOX with 99mTc; its optimization, characterization and quality control of the radiolabeled DOX. Labeling efficiency was determined by
paper chromatography. More than 92% labeling was obtained at pH 6–7, 10–12 μg stannous chloride and 200 μg of DOX. The stability
of 99mTc–DOX was studied up to 5 h. All the experiments were performed at room temperature (25± 2 °C). The characterization of the
labeling compound was performed by HPLC and electrophoresis. Electrophoresis indicates that labeled DOX has no charge and
HPLC shows single specie of labeled compound.
Authors:Gholamhoss G. Hamedani and Gholamhoss G. Hamedani
This is a follow up to our previous works characterizing well-known univariate continuous distributions based on a simple relationship between two truncated moments. Three of the distributions considered here unify many distributions employed for size distribution of income (which were characterized in our previous works). Another three distributions characterized here, were first introduced in the context of minimum dynamic discrimination information approch to probability modeling.