The techniques associated with these regions of the electromagnetic spectrum are probably the most widely used for analytic work. The molecular substructures that are responsible for interacting with ...

Raman spectroscopy, compatible with molecular and material samples, is one of the most popular quantitative and qualitative spectroscopic techniques. A sample has a distinct Raman “fingerprint” that ...

The principles involved in setting up any viable system of spectral classification are discussed. Their application is illustrated by reviewing the essential features of the original MK system of two ...

Spectral types and Hγ (W Hγ) equivalent widths have been derived from low dispersion (92 Å/mm and 51 Å/mm) spectrograms of the brightest stars in NGC 281, NGC 1893 (Aur OB 2), NGC 6823 (Vul OB 1), NGC ...

Dielectric spectroscopy is a type of impedance spectroscopy that measures the dielectric properties of a system as a function of frequency. The external field interacts with the dipole moment of the ...

Raman spectral preprocessing strategy based on self-supervised learning (RSPSSL) and its spectral preprocessing performance. The proposed preprocessing model effectively improved the diagnostic ...

Providing such a wide range of techniques ensures that samples are analysed by the most economical method, depending on the type of material, the form of the sample and the level of accuracy required.