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Modeling boron separation from water by activated carbon, impregnated and unimpregnated
(Roma : Società chimica italiana, 2000)
The sorption of boron from boric acid water solution by impregnated activated carbon has been studied Barium, calcium, mannitol, tartaric acid and citric acid were used as chemical active materials. All processes were ...
Rapid formation of high Tc phase in Bi-Pb-Sr-Ca-Cu-O system
(Elsevier, 2000)
The preparation of high purity 140nm sized Bi-Pb-Sr-Ca-Cu-O particles is based on thermal decomposition of aerosol generated ultrasonically (at 1.7Mhz) from IM nitrate precursor which contain organic additive. Particle ...
Hydroxyapatite/poly-L-lactide (Collagen) biocomposite with poly-L-lactide of different molecular weights
(Weinheim : Wiley-VCH Verlag, 2000)
In this communication we describe the preparation of HAp/PLLA biocomposites by hot pressing of HAp powder with PLLA of different molecular weights, with and without the addition of collagen. We made PLLA of low molecular ...
Internal redundancy - the way to improve robot dynamics and control performances
(Dordrecht : Kluwer Academic Publishers, 2000)
The research follows the concept of variable geometry. The concept was originally introduced for general mechanical system in order to improve its dynamic behaviour. Here, we apply the concept to robots. It can be shown ...
ZnO varistors prepared by direct mixing of constituent phases
(Sendai : Japan Institute of Metals, 2000)
ZnO varistors with non-linearity coefficients reaching 50 and low values of the leakage current (approximately 0.01 A/m2), were obtained by a method referred to as `direct mixing of constituent phases'. The method is based ...
Investigation of ion-beam modified silicon by photoacoustic method
(IEEE, 2000)
Thermal, elastic and electronic transport properties of ion-modified silicon samples were investigated by a photoacoustic frequency transmission technique. The experimental photoacoustic data vs the modulating frequency ...
The influence of urea on the formation process of BiPbSrCaCuO superconducting ceramics synthesized by spray pyrolysis method
(Elsevier, 2000)
The influence of urea on the formation process in the Bi-Pb-Sr-Ca-Cu-O system, as well as, on the final high Tc. phase content and morphology of the powders obtained by spray pyrolysis method was studied. The process ...
The Schottky barrier contribution to photoacoustic effect in Au-Si system
(IEEE, 2000)
The photoacoustic effect in metal-semiconductor system, i.e., the influence of Schottky barrier on the thermal and electronic transport processes in semiconductor was investigated. The amplitude and phase spectra were ...
The equivalent electrical model of intergranular impedance of BaTiO/3-ceramics
(2000 22nd International Conference on Microelectronics, MIEL 2000 - Proceedings, 2000)
In this paper, the equivalent intergranular impedance model of BaTiO/sub 3/-ceramics is generated taking into consideration two types of connections between grains. The models are applied to a cluster of up to three spherical ...
Line-profile analysis of nanostructured ZnO powders obtained by freeze-drying method
(Uetikon-Zuerich : Trans Tech Publ, 2000)
Freeze-drying, as a cryochemical powders processing method is applied in ZnO submicrometar to nanosized powders synthesis. The process involves rapid freezing of the sprayed precursor solution, drying under vacuum by ...