Vis-NIR reflectance spectra of biomolecules dry powders at 293±2 K | BYPASS

Experiment

Title: Vis-NIR reflectance spectra of biomolecules dry powders at 293±2 K

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

Poch et al., 2017, Astrobiology, 17, 231 - 252

Comments

This experiment presents data shown in Figure 2 of the publication.

Owner

Database(s)

BYPASS

Experimentalists

Olivier Poch

Spectra preview

Experiment type

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 parameters

Variable type(s)

sample composition

Comments

The different samples of biomolecules were prepared and measured one after the other.

Location

Laboratory: Space Research & Planetary Sciences Division of the University of Bern (WP Unibe)

Instrument #1

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).

Spectral parameters

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

Angular parameters

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.

Polarization parameters

Illumination

Observation

Comments: partial polarization variable with wavelength (from monochromator grating)

Spatial parameters

Observation mode: roi averaged

History

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)