Abstract
SHS investigation development is considered from the geographical and historical viewpoint. 3 stages are described. Within Stage 1 the work was carried out in the Department of the Institute of Chemical Physics in Chernogolovka where the scientific discovery had been made. At Stage 2 the interest to SHS arose in different cities and towns of the former USSR. Within Stage 3 SHS entered the international scene. Now SHS processes and products are being studied in more than 50 countries.
Abstract
All the steroids are basically made of seventeen carbon atom skeletons
bonded in four fused rings: three six-membered cyclohexane rings and one fivemembered cyclopentane ring, they vary from each other by having different functional
groups. Recent modifications have added heteroatoms like nitrogen, oxygen, sulphur,
selenium, etc in the basic structure of naturally occurring steroids. Heterocyclic steroids
have always been a field of interest for researchers due to their diverse biological
performances. The biological activity of steroids and heterocyclic steroids is based on
the structure they possess. Spectroscopy plays a key role in the determination of
distinct properties of numerous compounds by their interaction with electromagnetic
radiation and the sort of interactions that may occur in different regions. The structure
of different steroids and heterocyclic steroids may be established through various
spectroscopic techniques viz. Infrared spectroscopy (IR), Nuclear Magnetic
Spectroscopy (NMR), Ultraviolet spectroscopy (UV) and mass spectrometry (MS).
Keywords:
Absorbance, Beer-Lambert law, Cholesterol, Electromagnetic radiation, Fourier Transform (FT), Fragmentation, Hook’s law, hypsochromic effect, Infrared spectroscopy, Larmor precession, Mass spectrometry, McLafferty rearrangement, nuclear spin, Nuclear magnetic resonance spectroscopy, Nuclear overhauser effect, Pascal’s triangle, rotational and vibrational energy levels, Steroids, U.V. spectroscopy.
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Authors:Bentham Science Books