The late prehistoric copper production site of the Vilabouly Complex in central Laos delivered different types materials that seem to be related chaine oppératoire for two main sites, Puen Baolo and Thong Na Nguak: minerals, slags crucible fragments. A selection these artefacts were analyzed (OM, SEM–EDS, XRD, bulk analyses) study extraction techniques, raw used steps at Vilabouly. various anal...

infant formula has a fatty acid composition that meets the needs of the neonates for unsaturated fatty acids.these fatty acids are of major importance during this period of life in which the brain and retina are developing, and will therefore have an influence upon visual acuity and learning abilities. oxygen reacts readily with unsaturated fatty acids, so that every time these compounds are ha...

it to 680•Ž in flowing nitrogen (PV-7). Four samples having different pre-heat-treatment conditions were selected; the original coke PV-7 , the second one prepared from PV-7 by the heat treatment at 1500•Ž for 60 min (PV-15) , the third also from PV-7 by the treatment at 2060•Ž for 60 min (PV-7-20) , and the fourth by the heat treatment of PV-15 at 2060•Ž for 60 min (PV-15-20). Each sample was ...