Download Watson TSQ Module 1.0 User Guide Version A

Glossary:
signal-to-noise ratio threshold A user-specified
chromatogram peak edge detection criterion used for
peak integration.
sites Specific amino acids that are attacked by the
enzyme listed.
slit width The width of the variable slit at the entrance
of the spectograph. Use a narrow slit for analytes with
very fine structures in the absorbance spectrum and
for high concentrations. Use a wide slit to detect very
low concentrations.
smoothing The application of a smoothing algorithm
to the data to improve the graphical appearance of
data by reducing the level of noise and/or to improve
peak detection. Xcalibur provides the following types
of data smoothing: boxcar smoothing and Gaussian
smoothing. improves the graphical appearance of
data by reducing the level of noise and/or to improve
peak detection.
smoothing points The odd integers from 1 (number
of points) to 15 used in a weighted average to reduce
the level of noise in the data, consequently improving
peak detection and the graphical appearance of the
data.
See also:
smoothing
SNP A single nucleotide polymorphism, which is a
small genetic change, or variation, that can occur
within a DNA sequence.
solute A dissolved substance. The dissolved
component of a mixture that is to be separated in a
chromatographic column. (Also called the sample or
analyte.)
SOP Standard Operating Procedure.
Sp Abbreviation for the preliminary score of the top
candidate peptide or protein for a given input data
file.
Thermo Scientific
spectral trees A representation of the data structure of
MSn spectra. A tree, which is like a structural
“fingerprint”, reflects the hierarchical spectra
dependencies in MSn experiments. For more details
on spectral trees, see the Help in Mass Frontier™.
spectrum averaging The averaging of spectral data for
a number of scans.
stability samples An analytical run definition. Used
to analyze the reliability of quality control samples over
time.
standard bracket sample type The calibration
samples in a Sequence having bracket [open] or
bracket [overlapped] type.
See also:
bracket [open]
bracket [overlapped]
standard deviation In statistics, the standard
deviation is a measure of the dispersion of a group of
measurements. For example, masses, times, or
intensities. Standard deviation is calculated as
follows:
where Var (Xi...XN) is the variance.
See also:
relative standard deviation
Standard Error of the Mean (SEM) An analytical run
definition. SEM is Standard Deviation divided by the
square root of n.
standard sample A sample with a known amount of
calibration reference material.
standard update sample type Xcalibur adds this
sample type to the calibration curve without
removing previous entries. The first calibration
sample in a Sequence having bracket [none] type is a
standard clear type. Xcalibur clears all previous data
for all calibration levels and begins a new set of
calibration data. Xcalibur assigns all subsequent
samples in the same calibration sequence to be the
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