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Enzyme Activities and Arylsulfatase Protein Content of Dust and the Soil Source

Biochemical Fingerprints?

USDA-ARS, Plant Stress and Water Conservation Laboratory, 3810 Fourth Street, Lubbock, TX 79416

View larger version (18K): [in a new window]   Fig. 1. The Lubbock Dust Generation, Analyses and Sampling System (LDGASS) that contains (A) a dust-generating tube, (B) two valves, (C) U tubing, (D) a settling chamber, and (E) two dust filters and an air flow meter to control attached vacuum. The 27- and 7-µm dust samples were collected in (C) and (D), respectively.

View larger version (36K): [in a new window]   Fig. 2. Linear regression analyses of the enzyme activities of soil and the 27- (A) or 7-µm (B) dust samples: , fine sandy loam; , sandy clay loam; , loam. Data on solid symbol (• = outlier) for ß-glucosidase activity (loam) were not included in calculating the regression line.