It sounds like an extraneous sample, perhaps from a movie, definitely from the days before digital.
Students showed significant positive normalized learning changes in eight of the 14 questions, falling into the following core concepts: Controls, Biological Variation, Extraneous Factors, Independent Sampling, Random Sampling, and Purpose of Experiments.
Based on pretesting, a 1 100 dilution of extracted DNA to molecular-grade water was used to minimize inhibitory effects of extraneous matter in the samples.
The control sample Sk12 gave no products with primers for loci of either M. leprae or M. tuberculosis, indicating that contamination of the samples from extraneous sources or cross-contamination between the samples was negligible.
Based on pretesting, the extracted DNA were diluted (1 100) with molecular-grade, nuclease-free water before being analyzed using qPCR to minimize inhibitory effects of extraneous matter in the samples.
Although natural formation of PCDD/Fs had been postulated much earlier, some previous studies may have been compromised as a result of extraneous contamination of field samples or in the laboratory [ 133, 135, 136].
Nevertheless, because of the presence of characteristic peaks both at ~33° and 57°, it can be inferred that MoS2 is the dominant phase with no extraneous phase in this sample.
When protected from light, external contaminants, and extraneous contact, NR-adsorbed PS samples were found to be stable for several weeks and could be safely stored for weeks before experimentation.
The peak width determined from the chromatogram includes contributions from the sample-injection technique, extraneous tubing, and the detector.
The presence of extraneous variables caused by the sample variability can significantly affect the statistical analysis of high-throughput genetic data.
