Hamsters are increasingly used for comparative study of cholesterol metabolism (1). To assess the validity of differential precipitation with Mg2 4-phosphotungstate for quantification of plasma high-density-lipoprotein cholesterol (HDLC), we did a method-comparison with ultracentrifugal flotation. The precipitating reagent, 0.55 mmolJL phosphotungstic acid and 25 mmol/L magnesium chloride, was ...

The charging by secondary electron emission (SEE) from particles is known as a significant charging process in astrophysical plasmas. This work aims at evaluating the significance of SEE for charging of meteoric smoke particles (MSPs) in the Earth’s polar atmosphere. Here, the atmosphere is subject to a bombardment of energetic electrons from the magnetosphere (and partly the sun). We employ th...

We present the first analysis of precipitation chemistry data from the Great LakesAtmospheric Deposition (GLAD) network of wet-only precipitation samplers. Lake loadings werecalculated from 1or 2-yr (1982-1983) volume-weighted mean ion concentrations and 30-yr meanannual precipitation amounts, using an objective analysis method to interpolate measurements to a40 x 40 km square g...

The mechanism of aqueous contaminant removal by elemental iron (Fe 0 ) materials (e.g., in Fe 0 -H2O systems) has been largely discussed in the “iron technology” literature. Two major removal mechanisms are usually discussed: (i) contaminant adsorption onto Fe 0 oxidation products, and (ii) contaminant reduction by Fe 0 , Fe II or H/H2. However, a closer inspection of the chemistry of the Fe 0 ...

[1] Air pollution (ozone and particulate matter in surface air) is strongly linked to synoptic weather and thus is likely sensitive to climate change. In order to isolate the responses of air pollutant transport and wet removal to a warming climate, we examine a simple carbon monoxide–like (CO) tracer (COt) and a soluble version (SAt), both with the 2001 CO emissions, in simulations with the Ge...