Chemical and ecotoxicological characterization of Columbia River sediments below the Hanford site (USA)

Pesticide impact study in the peri-urban horticultural area of Gran La Plata, Argentina

“…PCA was based on OM and pesticide chemical contents, and on toxicity test data. Pesticide concentrations below DL were replaced by half the corresponding limit of detection (Delistraty and Yokel, 2007). Significant factors were selected based on the Kaiser principle of accepting Eigenvalues N1 (Quinn and Keough, 2002).…”

Integrated ecotoxicological assessment of bottom sediments from the Paraná basin, Argentina

“…Analytes not detected in at least 50 percent of the stations were not included in the PCA. Concentrations below the detection limit were replaced with a value of one-half the corresponding limit (Delistraty and Yokel, 2007). PCA was performed using tools of the software XL-STAT (Addinsoft 2005, version 7.5.3).…”

Tissue radionuclide concentrations in water birds and upland birds on the Hanford Site (USA) from 1971–2009

“…In addition, K-40 was not evaluated, since its occurrence is not the result of nuclear technology. That is, K-40 is not considered a Hanford-related analyte (Delistraty and Yokel, 2007;USDOE, 2008).…”