Analysis of Human Breath by Millimeter-Wave/Terahertz Spectroscopy

Human breath analysis via cavity-enhanced optical frequency comb spectroscopy

Analysis of human skin tissue by millimeter-wave reflectometry.

BACKGROUND/PURPOSE Millimeter-wave reflectometry is a potentially interesting technique to analyze the human skin in vivo in order to determine the water content locally in the skin. Purpose of this work is to investigate the possibility of skin-tissue differentiation. In addition, it addresses the influence of the pressure of the probe on the skin, the influence of an air gap between probe and...

Millimeter - Wavelength Spectroscopy

Millimeter-wavelength spectra were obtained of CO, HCN, H2CO, and CH3OH in Comet C/1996 B2 (Hyakutake) with the NRAO 12-m telescope on 21 Mar 1996 UT. The emission of CO, H2CO and HCN was mapped in the coma when the comet was 0.2 AU from the Earth, providing a detailed look at the behavior of these species in the inner coma. The mapping data indicate the presence of multiple velocity components...

Millimeter-wave Spectroscopy of Aminomalononitrile

In low-temperature conditions of the interstellar medium pure HCN and mixtures of HCN with H2O and NH3 subjected to high-energy sources can be converted into different HCN polymers. In this context the HCN trimer – aminomalononitrile (AMN, H2NCH(CN)2) is an interesting candidate for astrophysical detection. We measured the rotational spectrum of AMN using the Lille BWO-based fast scan spectrome...

Cavity-enhanced optical frequency comb spectroscopy: application to human breath analysis.

Broad-bandwidth, high-spectral-resolution optical detection of human breath has identified multiple important biomarkers correlated with specific diseases and metabolic processes. This optical-frequency-comb-based breath analysis system comes with excellent performance in all criteria: high detection sensitivity, ability to identify and distinguish a large number of analytes, and simultaneous, ...