Scientists end up with a graph, each peak representing a different molecule that can be compared to known samples.
It will be analyzed for forensic clues, and profilers at the Federal Bureau of Investigation will compare the handwriting with other known samples of Mr. Wong's writing.
Frequency bands in a spectrum of light from an unknown object compared with bands from known samples can reveal the object's composition.
Frequency peaks in a spectrum of light from an unknown object compared with bands from known samples can reveal the materials of the object.
When a significant frequency peak or band is detected in a spectrum of light from an unknown object, comparing bands from known samples can reveal the material composition of the object.
But when it was tested on 150 known samples, the resulting system was able to identify MRSA correctly 96% of the time.
Traditional practice includes manual comparison of each biochemical property of the unknown sample with known reference samples and inference of its identity based on the maximum similarity pattern with the known samples.
In a few weeks, member states of the World Health Organization will consider the destruction of the last known samples of smallpox virus, currently held in secure labs by the United States and Russia.
Assays were tested on samples with known genotype and the selection criteria for inclusion in the final panel included: correct genotypes for known samples and positive controls (see below); genotypes being reproducible across multiple chip runs; the ranking of the target SNP in the prioritized list; and assays not requiring the STA (Specific Target Amplification) step.
The fine stone blades were excavated from a prehistoric site called Pinnacle Point on the southern coast of South Africa and are between 6,000 and 11,000 years older than the previous oldest known samples of spear and arrow blades, scientists said.
Captured by the webcam, open source software allows results to be compared with already known samples.
