Fredrik Robertson

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Concentrations of dissolved arsenic in ground-water in alluvial basins of Arizona commonly exceed 50 μg L(-1) and reach values as large as 1,300 μg L(-1). Arsenic speciation analyses show that arsenic occurs in the fully oxidized state of plus 5 (As+5), most likely in the form of HAsO4(∼2), under existing oxidizing and pH conditions. Arsenic in source areas(More)
The aim of the present study was to evaluate weather early supervised exercise improves recanalization of acute deep vein thrombosis (DVT) and reduces symptoms. From September 2001 to March 2004, of 381 patients, 72 eligible patients were included and with a mean age 54 ± 14 years, 39 (52%) men with deep vein thrombosis (DVT) proven with phlebography were(More)
Contrary to the prevailing notion that oxygen-depleting reactions in the soil zone and in the aquifer rapidly reduce the dissolved oxygen content of recharge water to detection limits, 2 to 8 milligrams per liter of dissolved oxygen is present in water from a variety of deep (100 to 1000 meters) aquifers in Nevada, Arizona, and the hot springs of the folded(More)
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