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. 2020 Aug 7;10:13361. doi: 10.1038/s41598-020-70305-6

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© The Author(s) 2020

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Optical transmittance (a) and absorbance (b) spectra of glucose solutions and heavy water. The dotted lines in gray represent the wavelength of the laser (1,645 nm) in the UOS system. (c) Absorbance values at 1,645 nm and the fitted regression line. UOS, ultrasound-modulated optical sensing.