Sentences with phrase «extract soil samples»

Susannah Tringe uses a corer to extract soil samples in a wetland on Twitchell Island in the Sacramento - San Joaquin River Delta.

Not exact matches

DNA soup: Despite cleaning, the extract is a soup of DNA from the sample and contaminated material, mostly microbes from soil where the remains were buried.

Researchers have been able to identify animal and plant DNA from soil samples since 2003, but this is the first time they've extracted hominin DNA.

In the laboratory, researchers extracted organic compounds from the pre-Harvey dust and post-Harvey soil samples and analyzed them using gas chromatography.

Topp's research team ultimately sampled soil from the plots, extracting DNA, and cloning large fragments of that DNA into a strain of E. coli that is sensitive to most antibiotics.

After extracting and analyzing DNA at the core of the coprolites, which haven't been contaminated by microbes in the soil, the researchers found that although both tribes consumed seafood, only the Saladoid samples contained freshwater fish parasites, suggesting that the tribe consumed raw fish regularly.

To determine the levels of PAHs in soil and sediment, researchers first extract the compounds from a sample, a step that can take up to 16 hours and requires large amounts of hazardous solvents.

The nitrosomonas eutropha was extracted from soil samples; once more, a group applied live bacteria while another applied a placebo.

A simple technique for extracting samples of soil solution by high speed centrifugation is described.