This paper aims to analyze the thermal performance of four different heat transfer fluids in a hot oil system located paraffin hydrotreatment and fractionation plant petroleum refinery. The software Petro-SIM? (KBC- -Yokogawa) was employed elaborate steady-state simulations intended compare fluid currently used (eutectic biphenyl diphenyl oxide) three proposed as substitutes: (namely n-C13 +) p...

Institut für Biologie V (Ökologie/Ökotoxikologie/Ökoehemie), Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Bundesrepublik Deutschland Z. Naturforsch. 49c, 719-726 (1994); received August 1/September 7, 1994 Glycine max, Triticum aestivum, 3,4-Dichloroaniline, Metabolism, Translocation The roots of 13-day-old soybean (Glycine max L.) and 7-day-old wheat ( Triticu...

Rabbit antisera were prepared against ten antigenically different influenza A strains. These sera were absorbed with one or more heterologous strains and in each case all the heterologous or crossing antibody was removed; the anti-bodies remaining after this treatment were specific for the immunizing strain or group of strains. On the basis of reactions with absorbed sera, the strains fell into...

Background: Lead glass has a wide variety of applications in radiation protection. This study aims to investigate some characteristics of lead glass such as the γ-ray energy-dependent mass and linear attenuation coefficients, the half-value layer thickness, and the absorbed dose distribution for specific energy. Materials and Methods: The attenuation parameters of different lead glass types aga...

We present an experimental validation of a kilovoltage (kV) X-ray source characterization model in an anthropomorphic phantom to estimate patient-specific absorbed dose from kV cone-beam computed tomography (CBCT) imaging procedures and compare these doses to nominal weighted CT-dose index (CTDIw) dose estimates. We simulated the default Varian on-board imager 1.4 (OBI) default CBCT imaging pro...

For dye-sensitized solar cells (DSSC), the fundamental process that determines the maximum short-circuit current is the absorption of light. In such devices, this is produced by the concurrent phenomena of light absorption by dye molecules and light trapping in the mesoporous, titania photoanode structure. The decoupling of these two phenomena is important for device characterization and the de...

Introduction: Average glandular dose calculation in mammography with Mo-Rh target-filter and dose calculation for different situations is accurate and fast. Material and Methods: In this research, first of all, x-ray spectra of a Mo target bombarded by a 28 keV electron beam with and without a Rh filter were calculated using the MCNP code. Then, we used the Sobol-Wu parameters to write a FORTRA...