Measuring the Humic Acids Content of Commercial Lignites and Agricultural Top Soils in The National Soil Project

by EA Ghabbour et al.

...gravimetric protocol...measures the HA content of lignites used as commercial sour-ces of HS products and agricultural top soil samples from southern Idaho...lignites and soil samples contain 2-41 %HA and 0.31-9.8 %HA, respectively...facilitate[s] rapid soil assessment, carbon cycling research and commercial HA products certification...

Applicability of Standard Antibiotic Toxicity Tests to the Ambient Aquatic Environment.

by F. L. Hellweger et al.

Partitioning of antibiotics on DOM could affect their bioavailability...making the laboratory...values inapplicable to the ambient environment. [But] no absorption to test media suggests that...laboratory-determined MIC values are applicable.

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