One (2.8%) bur in negative control group and all burs in positive control group showed
contamination. In test groups, 27(77.1%), 29(82.8%), 27(77.1%) and 24(68.5%) burs showed
contamination in groups 1, 2, 3 and 4, respectively.
So far, no
contamination was detected inside either car.
Even so, Xinjiang cotton is high in
contamination - especially the filmy plastic pieces that cause headaches to spinners.
The first step is to understand the makeup of the
contamination. Many analytical tools exist to determine the ionic distribution within the sample.
The results of this study showed considerable bacterial and fungal
contamination particularly in pumice slurry may be due to the use of non-sterile water to mix the pumice powder, Gram-positive bacilli and fungi were present in the samples of pumice powder, rag wheel and polished dentures.
But prison operator Sodexo, which began life as a catering firm, said investigators found no evidence of
contamination.
"We do have some wells within the
contamination plume which show low levels of
contamination for chlorinated solvents in the untreated water.
Sample testing alone is not sufficient to exclude
contamination reliably.
Suprapubic aspiration and straight catheter technique are the best methods to avoid
contamination but they are invasive.