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Prikaz rezultata 11-20 od 21
Wall-to-bed heat transfer in vertical hydraulic transport and in particulate fluidized beds
(Pergamon-Elsevier Science Ltd, Oxford, 2008)
Wall-to-bed heat transfer in hydraulic transport and in particulate fluidized beds of spherical particles was studied. Experiments were performed by spherical glass particles of 0.80-2.98 mm in diameter with water in a ...
Polyaniline as possible anode materials for the lead acid batteries
(Elsevier Science Bv, Amsterdam, 2008)
Electrochemically formed thin film polyaniline (PANI) anode and lead dioxide (PbO2) cathode, obtained from sulfuric acid solution, for potential applications as electrode materials in PANI vertical bar H2SO4 vertical bar ...
Determination of thermal shock resistance of silicon carbide/cordierite composite material using nondestructive test methods
(Elsevier Sci Ltd, Oxford, 2008)
In the present work Mg-exchanged zeolit and silicon carbide were used as starting materials for obtaining cordierite/SiC composite ceramics with weight ratio 30:70 and 50:50. Behavior of composite ceramics after thermal ...
Quality of chemically modified hemp fibers
(Elsevier Sci Ltd, Oxford, 2008)
Hemp fibers are very interesting natural material for textile and technical applications now. Applying hemp fibers to the apparel sector requires improved quality fibers. In this paper, hemp fibers were modified with sodium ...
High-throughput diversity and functionality analysis of the gastrointestinal tract microbiota
(Bmj Publishing Group, London, 2008)
The human gastrointestinal (GI) tract microbiota plays a pivotal role in our health. For more than a decade a major input for describing the diversity of the GI tract microbiota has been derived from the application of ...
Flow boiling of R134a and ammonia in a plate heat exchanger
(Elsevier Ltd, 2008)
This paper presents experimental results on evaporation heat transfer for flow boiling of ammonia and of R134a in a chevron-pattern corrugated plate heat exchanger (PHE). The measurements enable the evaluation of a quasi-local ...
Pt/C doped by MoOx as the electrocatalyst for oxygen reduction and methanol oxidation
(Elsevier Science Bv, Amsterdam, 2008)
The oxidation of methanol and reduction of oxygen were studied on MoOx-Pt/C nano-catalysts prepared by the polyole method combined by MoOx post-deposition. The catalysts were characterized by TEM and EDX. The presented ...
Kinetics of sunflower oil methanolysis at low temperatures
(Elsevier Ltd, 2008)
The kinetics of the sunflower oil methanolysis process was studied at lower temperatures (10-30 °C). The sigmoidal kinetics of the process was explained by the mass transfer controlled region in the initial heterogenous ...
Thermal properties of textile fabrics made of natural and regenerated cellulose fibers
(Elsevier Sci Ltd, Oxford, 2008)
Cotton (cellulose) and viscose (regenerated cellulose) fibers are commonly applied in clothing textile fabrics. Thanks to the unique hemp (lignocellulose) fibre properties and its ecological benefits (biodegradability), ...
Direct observation of confined acoustic phonons in the photoluminescence spectra of a single CdSe-CdS-ZnS core-shell-shell nanocrystal
(Amer Physical Soc, College Pk, 2008)
We report on the direct observation of confined acoustic phonons in the photoluminescence spectra of single CdSe-CdS-ZnS nanocrystals, whose ligands were exchanged to poly(ethylene oxide) (PEO) before they were embedded ...