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Whole-lake additions of dissolved inorganic 13 C were used to measure al-lochthony (the terrestrial contribution of organic carbon to aquatic consumers) in two unproductive lakes (Paul and Peter Lakes in 2001), a nutrient-enriched lake (Peter Lake in 2002), and a dystrophic lake (Tuesday Lake in 2002). Three kinds of dynamic models were used to estimate(More)
Absh-uct-Static field inhomogeneity in magnetic resonance (MR) imaging produces geometrical distortions which restrict the clinical applicability of MR images, e.g., for planning of precision radiotherapy. The purpose of this paper is to describe a method to compute distortions which are caused by the difference in magnetic susceptibility between the(More)
at the Research Nursery for their technical as sis tance; J. Carter at Jayker Wholesale Nursery for his cooperation and contributions; and Drs. Iersel and the anonymous reviewers for their comments on earlier drafts. Abstract. Juniperus scopularum Sarg. (Rocky Mountain juniper) and Potentilla fruticosa L. 'Gold Drop· (gold drop po ten til la) plants grown(More)
The behavior of southern bean mosaic virus (SBMV) virions in urea was markedly pH dependent and revealed several novel features. In the absence of urea (5 degrees , 1 hr) SBMV was stable as a 115 S entity between pH 2.5 and 9.5, yielded a slowly sedimenting (ca 60-65 S) entity at pH 10.5, and was degraded into a 35-40 S product at pH 11.0. In 4.0 M urea,(More)
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