The PANGAEA mineralogical database

Drozdovskiy, Igor; Ligeza, Gabriela; Jahoda, Pavel; Franke, M.; Lennert, P.; Vodnik, Primož; Payler, Samuel J.; Kaliwoda, Melanie; Pozzobon, Riccardo; Massironi, Matteo; Turchi, Leonardo; Bessone, Loredana; Sauro, Francesco

doi:10.1016/j.dib.2020.105985

Cited by 10 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A green laser with a wavelength of 532 nm, the ×100 long working distance (LWD) objective (0.80 numerical aperture) were used for all measurements and the Labspec 6 software was used to process the acquired spectra. We used an in‐house reference Raman database MSC‐RD (Mineralogical State Collection Raman Database, Drozdovskiy et al, 2020), the KnowItAll database (Horiba Edition, now John Wiley & Sons) and the database from the RRUFF™ Project (Lafuente et al, 2015). The instrument was calibrated with a silicon wafer (520.7 cm −1 ) daily and immediately before the measurements took place.…”

Section: Methodsmentioning

confidence: 99%

White and green rust chimneys accumulate RNA in a ferruginous chemical garden

Helmbrecht,

Weingart,

Klein

et al. 2023

Geobiology

View full text Add to dashboard Cite

Mechanisms of nucleic acid accumulation were likely critical to life's emergence in the ferruginous oceans of the early Earth. How exactly prebiotic geological settings accumulated nucleic acids from dilute aqueous solutions, is poorly understood. As a possible solution to this concentration problem, we simulated the conditions of prebiotic low‐temperature alkaline hydrothermal vents in co‐precipitation experiments to investigate the potential of ferruginous chemical gardens to accumulate nucleic acids via sorption. The injection of an alkaline solution into an artificial ferruginous solution under anoxic conditions (O2 < 0.01% of present atmospheric levels) and at ambient temperatures, caused the precipitation of amakinite (“white rust”), which quickly converted to chloride‐containing fougerite (“green rust”). RNA was only extractable from the ferruginous solution in the presence of a phosphate buffer, suggesting RNA in solution was bound to Fe2+ ions. During chimney formation, this iron‐bound RNA rapidly accumulated in the white and green rust chimney structure from the surrounding ferruginous solution at the fastest rates in the initial white rust phase and correspondingly slower rates in the following green rust phase. This represents a new mechanism for nucleic acid accumulation in the ferruginous oceans of the early Earth, in addition to wet‐dry cycles and may have helped to concentrate RNA in a dilute prebiotic ocean.

show abstract

Section: Methodsmentioning

confidence: 99%

White and green rust chimneys accumulate RNA in a ferruginous chemical garden

Helmbrecht,

Weingart,

Klein

et al. 2023

Geobiology

View full text Add to dashboard Cite

show abstract

“…If no match could be found, geological Raman crystal databases RRUFF and PANGAEA (Planetary ANalogue Geological and Astrobiological Exercise for Astronauts) were consulted with a similar algorithm. [ 20,21 ] If the spectrum could be identified, it was classified as such and added to the database.…”

Section: Methodsmentioning

confidence: 99%

Raman hyperspectral imaging detects novel and combinations of crystals in synovial fluids of patients with a swollen joint

Niessink

Kuipers

Jong

et al. 2022

J Raman Spectroscopy

View full text Add to dashboard Cite

The identification of synovial crystals is important for diagnosing rheumatic diseases. Currently, rheumatologists worldwide use compensated polarized light microscopy (CPLM) for crystal identification, but this technique is flawed. Raman spectroscopy might offer an objective, accurate alternative. We have tested Raman hyperspectral imaging on synovial fluid samples of 28 patients with swollen joints, measuring 5–10 crystals in each of these. Reference spectra for identification were measured using patient material, synthetic compounds, and oxalate kidney stones. Additionally, RRUFF and PANGAEA Raman databases were used to identify spectra. We identified the classical pathological crystals monosodium urate for gout and calcium pyrophosphate for calcium pyrophosphate deposition disease (CPPD). Hydroxyapatite, lipid spherules, and calcium oxalate monohydrate have also been observed and had been previously identified in synovial fluids. Other crystals, which were not previously observed in synovial fluid using CPLM, have been identified as well: calcite, aragonite, anatase, rutile, thenardite, dolomite, and a carotenoid. In addition, we found combinations of crystals in 13 out of 28 patients. We propose that the observed large variation of detectable crystals from a small population of patients and a small number of crystals per patient has significant ramifications for the use of compensated polarized light microscopy for the diagnosis of gout and CPPD. Further studies are required to learn the clinical significance of these crystals in human arthritis.

show abstract

“…Only a few major minerals are introduced to the trainees in this phase to keep the focus on feature recognition. In subsequent exercises, the astronauts have the opportunity to query the ESA Mineralogical Database on the EFB [33] to obtain additional information on the physical characteristics and significance of each mineral. Once the trainee's observational skills are improved, a more detailed theoretical and practical lesson is conducted introducing them to the most important igneous, sedimentary and meteoritic rocks in classroom.…”

Section: Rock Specimen Recognitionmentioning

confidence: 99%