Sentence examples for traces of contamination from inspiring English sources

F.D.A. Says Fish Are Untainted Farmed fish that may have eaten food with imported Chinese ingredients show no traces of contamination and should be safe to eat, the Food and Drug Administration said yesterday.

Testing of 284 post offices and mail sorting centers -- those thought to be at greatest risk among the country's tens of thousands of postal centers -- has found only 23 with anthrax, almost all of which had only traces of contamination.

Hall's ingenuity first came to the fore in the 1950s, when the methods of analysis he devised for detecting microscopic traces of contamination of important artefacts, based on x-ray fluorescence techniques, cracked the riddle of the Piltdown Man fossils.

A package of bean sprouts found past its sell-by date in the back of an E. coli patient's refrigerator also showed no traces of contamination, the Hamburg health authorities said Tuesday.

"This is about a very, very small risk of repetitive contact for any traces of contamination that people may have taken out," Public Health England's deputy medical director Jenny Harries said at the same press conference.

The rate of synthesis of aminoacylated tRNA, and the degree to which an analog competes effectively against traces of contamination with the natural amino acid, can greatly affect the yield and purity of analog-containing peptides synthesized by in vitro translation.

"The problem with radiocarbon dates of this antiquity is that it only takes a tiny trace of contamination from modern organic material to distort results," said Higham.

The sequenced libraries showed no trace of contamination or degradation and the size range was within 40 220 bp as expected for RRBS (Supplementary Figs 4 and 5, and Supplementary File 1).

Discriminative molecular subtyping methods are necessary for timely outbreak detection and tracing of contamination sources.

Antigen screening, PFGE, multi-locus sequence typing (MLST), and a newly proposed CRISPR typing will all produce some level of ID; however, these methods are not currently able to place a new unknown strain into an evolutionary context, and that lack of context prevents more robust track-and-trace of contamination sources.

In 1964, a chemical spill in the basement of St. Albans Naval Hospital's nuclear medicine laboratory left traces of radioactive contamination.