Results 251 to 260 of about 376,116 (305)
Some of the next articles are maybe not open access.
OSHA and elongate mineral particles
Toxicology and Applied Pharmacology, 2018The United States Occupational Safety and Health Administration (OSHA) was established to provide guidance to protect workers from hazards in the workplace. After broadly adopting extant health and safety standards, OSHA promulgated an expanded standard for regulation of asbestos.
openaire +2 more sources
Organic layers coating mineral particles
Annales de Chimie Science des Matériaux, 2004Un materiau mineral mis en contact avec des molecules biologiques peut induire des reactions indesirables comme la denaturation de proteines, la coagulation du sang ou bien une reponse du systeme immunitaire. Une maniere de surmonter cet obstacle est de recouvrir le materiau avec une couche biocompatible. Les proprietes des nouveaux systemes sont alors
Hubert Hommel +2 more
openaire +1 more source
Journal of Colloid and Interface Science, 2017
Flotation of 43μm diameter, hydrophilic glass beads with hydrophobic cationic polystyrene nanoparticle flotation collectors revealed that bead-bead collisions during conditioning and flotation caused the irreversible abrasion of the adsorbed nanoparticles. The abraded particles were present in the suspension as large aggregates.
Xiaofei Dong +4 more
openaire +2 more sources
Flotation of 43μm diameter, hydrophilic glass beads with hydrophobic cationic polystyrene nanoparticle flotation collectors revealed that bead-bead collisions during conditioning and flotation caused the irreversible abrasion of the adsorbed nanoparticles. The abraded particles were present in the suspension as large aggregates.
Xiaofei Dong +4 more
openaire +2 more sources
Effect of particle–particle shearing on the bioleaching of sulfide minerals
Biotechnology and Bioengineering, 2002AbstractThe biological leaching of sulfide minerals, used for the production of gold, copper, zinc, cobalt, and other metals, is very often carried out in slurry bioreactors, where the shearing between sulfide particles is intensive. In order to be able to improve the efficiency of the bioleaching, it is of significant importance to know the effect of ...
N, Chong, D G, Karamanev, A, Margaritis
openaire +2 more sources
Interaction between Biopolyelectrolytes and Sparingly Soluble Mineral Particles
Langmuir, 2010We investigate the complex physicochemical behavior of dispersions containing calcium carbonate (CaCO(3)) particles, a sparingly soluble mineral salt; and carrageenans, negatively charged biopolyelectrolytes containing sulfate groups. We reveal that the carrageenans suspend and stabilize CaCO(3) particles in neutral systems by absorbing on the particle
Versluis, P., Popp, A.K., Velikov, K.P.
openaire +2 more sources
Froth Flotation of Mineral Particles: Mechanism
Drying Technology, 2008This work provides a review on literature works that investigated the mechanisms controlling particle-bubble interactions in the froth flotation process. The three-zone model comprising collision step, attachment step, and detachment step was discussed in detail. Theoretical and experimental studies were summarized.
Qi Min +5 more
openaire +1 more source
2003
This paper describes the implementation of Data Mining tasks using Particle Swarm Optimisers. The object of our research has been to apply such algorithms to classification rule discovery. Results, concerning accuracy and speed performance, were empirically compared with another evolutionary algorithm, namely a Genetic Algorithm and with J48 – a Java ...
Tiago Sousa, Arlindo Silva, Ana Neves
openaire +1 more source
This paper describes the implementation of Data Mining tasks using Particle Swarm Optimisers. The object of our research has been to apply such algorithms to classification rule discovery. Results, concerning accuracy and speed performance, were empirically compared with another evolutionary algorithm, namely a Genetic Algorithm and with J48 – a Java ...
Tiago Sousa, Arlindo Silva, Ana Neves
openaire +1 more source
Exposure to mineral sands dust particles
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2004Abstract The aim of this study is to characterize the airborne particles in a Brazilian region with high concentration of mineral sands (Buena village). In this study proton induced X-ray emission (PIXE), plasma desorption mass spectrometry and alpha spectrometry were used for analyses of airborne particles.
K. Dias da Cunha +2 more
openaire +1 more source
Mineral liberation by particle bed breakage
Minerals Engineering, 1997The prediction of mineral liberation in mineral processing operations has become of major importance in the last two decades. This is especially the case for comminution processes. Many breakage liberation models have been proposed but none has focused on a particular form of breakage.
Fandrich, R. G. +3 more
openaire +2 more sources
The friction of mineral particles
British Journal of Applied Physics, 1958The coefficient of friction of loose particles slid between parallel plates is approximately proportional to the Mohs hardness of the particles. The particles are crushed during sliding.
openaire +1 more source