The gravity concentrate was 0.16% of the feed weight, assayed 920 g/t Au and 5,750 g/t Ag and represented gold and silver recoveries of 22.4% and 4.4% respectively. The gravity concentrate was not ...

Study design: A matched case-control study. Objectives: To clarify the influence of urine specific gravity and drinking water quality on the formation of urinary stones in persons with spinal cord ...