The terahertz (THz) frequency range corresponds to molecular vibrations or relaxation modes such as those for the hydrogen bond. Most biomolecules are activated only in aqueous solutions, thus, to understand the function and structure of biomolecules, it is necessary to investigate the characteristics of electromagnetic waves in hydrated samples. THz radiation causes little damage to the human body, thus it is expected that it can be applied for noninvasive examinations. However, spectrometry of the transmitted light is difficult, since the absorption of THz radiation in water is extremely high. In this study, we used sub-THz radiation (frequencies near to 0.1 THz), where the absorption is lower than for THz radiation, to measure the reflectance of a glucose water solution. We found that the reflectance decreases in proportion with the glucose concentration. These results suggest that sub-THz radiation can be used in the noninvasive measurement of blood glucose levels.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6001235PMC
http://dx.doi.org/10.1177/2055207617729534DOI Listing

Publication Analysis

Top Keywords

thz radiation
16
sub-thz radiation
12
glucose concentration
8
aqueous solutions
8
radiation
7
thz
6
measurements glucose
4
concentration aqueous
4
solutions reflected
4
reflected thz
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!