5501
DISTRIBUTION FUNCTION OF PRECIPITATED TIO2 PARTICLE VOLUMES
MANOLESCU, A; MANAILA, R; MEZINCESCU, GA; NISTOR, L; TEODORESCU, V; SERBAN, S; IOVITA, V
OCT 1990, REVISTA DE CHIMIE, 41, 815
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The distribution function of precipitated particles in relation to their volume is modelled by a function reproducing the three moments of the real function. The time evolution of the distribution is simulated by the numerical solving of a non-linear differential equation system for the moments, resulting from the rate equation which describes the growth of the particles.
5502
UTILIZATION OF NMR-SPECTROSCOPY FOR THE DETERMINATION OF POLYACRYLAMIDE SOLUTIONS CONCENTRATION
CONTINEANU, M; CONSTANTINESCU, O
SEP 1990, REVISTA DE CHIMIE, 41, 730
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A method of the determination of the concentration of the Medasol type hydrolized and non-hydrolized polyacrylamide in aqueous solution by higy resolution MNR is presented. The method may be applied to dilute solutions under the conditions presented in this paper.
5503
ON THE BOND ORIENTATIONAL ORDER IN ICOSAHEDRAL PHASES
RADULESCU, O; MANAILA, R
SEP 1990, PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 161, 73
DOI: 10.1002/pssb.2221610105
5504
INFLUENCE OF PHOSPHORIC-ACID AND OF PERCHLORIC-ACID ON ELECTROFORMATION OF ELECTRODES OF LEAD-SULFURIC ACID BATTERIES
MATEESCU, AG; MATEESCU, D
SEP 1990, REVISTA DE CHIMIE, 41, 723
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The microstructure modifications have been studied during the electroformation of positive and negative plates which give information regarding the optimal conditions for the obtaining of plates for lead batteries. The microstructure proved to depend on the conditions under which the electroformation takes place and on the nature of the electrolyte additions. The SEM studies showed that in the positive active mass, the particles are heterogeneously scattered and that they consist of amorphous and crystalline areas.
5505
TECTONIC IMPLICATIONS OF PALEOMAGNETIC RESEARCH INTO UPPER CRETACEOUS MAGMATIC ROCKS IN THE APUSENI MOUNTAINS, ROMANIA
PATRASCU, S; BLEAHU, M; PANAIOTU, C
AUG 20 1990, TECTONOPHYSICS, 180, 322
DOI: 10.1016/0040-1951(90)90316-Z
5506
CONSTRAINTS ON THE CHARGE-CORRELATION FUNCTION FOR 2-DIMENSIONAL QUANTUM-SYSTEMS
MANOLESCU, A; MEZINCESCU, GA
AUG 15 1990, PHYSICAL REVIEW A, 42, 2046
DOI: 10.1103/PhysRevA.42.2042
5507
TRANSMISSION OF LIGHT THROUGH DETERMINISTIC APERIODIC NON-FIBONACCIAN MULTILAYERS
DULEA, M; SEVERIN, M; RIKLUND, R
AUG 15 1990, PHYSICAL REVIEW B, 42, 3689
DOI: 10.1103/PhysRevB.42.3680
5508
HOPPING CONDUCTIVITY OF THE INTERACTING HONEYCOMB LATTICE GAS
PITIS, R
AUG 1 1990, PHYSICAL REVIEW B, 42, 2520
DOI: 10.1103/PhysRevB.42.2514
5509
INCORPORATION AND AGGREGATION PROPERTIES OF BISMUTH IONS IN KCL CRYSTALS
NISTOR, SV; STOICESCU, G; MATEESCU, CD
AUG 1990, PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 160, 431
DOI: 10.1002/pssb.2221600205
5510
MOSSBAUER INVESTIGATIONS OF THE FE-CU-MN CATALYSTS FOR FISCHER-TROPSCH SYNTHESIS
SPANU, V; FILOTI, G; ILIE, I; ZAMFIRESCU, E
JUL 1990, HYPERFINE INTERACTIONS, 57, 2113
DOI: 10.1007/BF02405772