- DOI
- 10.26302/SSHADE/EXPERIMENT_OP_20180111_001
- Data reference
- Poch, Olivier (2014): Vis-NIR reflectance spectra of biomolecules dry powders at 293±2 K. SSHADE/BYPASS (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_OP_20180111_001
- Publications
- Comments
- This experiment presents data shown in Figure 2 of the publication.
- Database(s)
- Experimentalists
- Type(s)
- laboratory measurement
- Description
- Reflectance spectra (from 0.38 to 2.4 µm) of commercial powders of some of the main terrestrial biomolecules were measured at room temperature (~293 K) and pressure (~1 atm): proteins, DNA, phospholipids, carbohydrates, pigments (porphyrins, carotenoid)
- Number of spectra
- 9
- Variable type(s)
-
- sample composition
- Comments
- The different samples of biomolecules were prepared and measured one after the other.
- Instrument
- SCITEAS Imaging System - hyperspectral imaging system Vis-NIR
- Sample holder
- The SCITEAS chamber was fully open, at room temperature and pressure. The samples were deposited on top of a big aluminum cylinder, directly below the imaging system (no window).
- Standard medium
- air
- Observation mode
- spectrum
- Spectral range type(s)
- Vis, NIR
- Valid spectral range(s)
-
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge #1 0.38 - 0.96 0.02 0.015 #2 0.96 - 2.4 0.01 0.03
Definition: incidence and emergence angles are positive with origin at nadir, and vary in same direction. Azimuth origin (increasing clockwise) is for i = e (opposition geometry).
- Observation geometry
- biconical
- Observation mode
- fixed angles
- Emergence angle
- 13.0°
- Azimuth angle
- 0.0°
- Comments
- The light beam emitted from the extremity of the fibre bundle positionned about 300 mm above the sample surface has a divergence half-angle of 12.7°. The light source incidence and azimuth angles are slightly variable from pixel to pixel.
Illumination
Observation
- Comments
- partial polarization variable with wavelength (from monochromator grating)
- Observation mode
- roi averaged
- Date begin - end
- 2014-02-12 - 2014-02-25
Versions
- Release date
- 2018-01-31 23:51:01 UTC+0000
- Version (Date)
- #1 (2018-01-31 23:51:01 UTC+0000)