|The Sigma Biochemical Library
consists of 10,411 FT-IR spectra of interest to those in the biochemical field. The
spectra were originally acquired at 2 cm-1 spectral resolution, then
mathematically deresolved when converted to Thermo Scientific library format.
Additional information stored in this library include the
molecular formula, CAS (Chemical Abstracts Services) registry number, when known, and the
location number of the printed spectrum in The Sigma Library of FT-IR Spectra are
available on-line. The Sigma location number is in the form:
<volume number> - <page number> <spectrum
For example, the spectrum with the location number 1-234B
refers to the second (B) spectrum on page 234 of Volume 1.
Abbreviations Used in Compound Names
Since the compound names associated with the spectra are
often very long, in many cases it has become necessary to abbreviate the full name of the
substance. The table below defines the abbreviations used in the name field.
||Bovine Serum Albumin conjugate
In addition to the above abbreviations,
occasionally atomic symbols are used in place of element names: e.g., CL = chloro-
or chloride. Also, Greek letters (alpha, beta, gamma,...,omega) are given as their
lower-case Roman equivalents (a, b, g,...,w), and the standard abbreviations are used for
amino acids in polypeptide names.