The versatile terahertz reflection and transmission spectrometer with the location of objects of researches in the horizontal plane

The experimental setup of versatile pulse terahertz reflection and transmission spectrometer and operation concept were described. Using this setup the temporary forms of THz signal reflected from and transmitted through the samples like amino acids, dental tissue and normal were obtained. The possibility of structural determination of powdered media was demonstrated using this method

SPECTRUM RESEARCH OF DNA MOLECULE IN THE TERAHERTZ FREQUENCY DOMAIN

Spectrum research of degraded DNA of herring in the range 0.1-1 THz was done. DNA native absorption lines were obtained. Lines, responsible for interaction with water and conformational changes, were identified

AMINO ACIDS IDENTIFICATION IN THE HUMAN SKIN BY SPECTRA APPLICATION OF 0,05-1,2 THZ RANGE

Spectra of human skin and tableted preparations of amino acids in 0,05 1,2 THz range are obtained by terahertz spectroscopy method with time resolution. Comparison of the amino acids spectral lines is made for their identification in the skin. It is shown that the following amino acids are the most clearly visible in the skin spectrum: tryptophan, cysteine, alanine, glycine, phenylalanine and histidine. Terahertz spectral lines of the mentioned amino acids are associated with molecules oscillating modes, caused by chemical reactions, hydration processes and molecules conformal changes in the human skin. Determination of amino acids spectral lines and other specific molecules, involved in the metabolic processes of the skin, is necessary for the development of terahertz diagnostic tool with maximum sensitivity and selectivity