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Multimodal surface analyses of chemistry and structure of biominerals in rodent pineal gland concretions
- Source :
- Applied Surface Science. 469:378-386
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Calcium carbonate and carbonate-hydroxyapatite are known to form inorganic components of crystals and calcareous concretions found in many non-skeletal tissues and structures including the pineal gland. We used advanced surface analyses techniques such as polarization microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), microfocus X-ray diffraction (XRD), transmission electron microscopy with selected area electron diffraction (TEM-SAED) to investigate samples extracted from rat pineal gland after irradiation with visible light for 12 h. Single-crystal X-ray diffraction showed that the concretions were largely amorphous with the presence of some nanocrystalline phases. High resolution TEM-SAED revealed the presence of iron oxide in the form of hematite. Spectroscopy data especially Raman spectroscopy revealed a mixed nature of these concretions, which corresponded reasonably with XPS, TEM and XRD. Overall the study confirms the presence of a mixed phase of calcium carbonates including calcite, aragonite and vaterite. We note that aragonite is not a common occurrence in vertebrates and recommend further investigation to rule out any link to pathology.
- Subjects :
- General Physics and Astronomy
02 engineering and technology
engineering.material
010402 general chemistry
01 natural sciences
symbols.namesake
chemistry.chemical_compound
X-ray photoelectron spectroscopy
Vaterite
Calcite
Chemistry
Aragonite
Surfaces and Interfaces
General Chemistry
Hematite
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Surfaces, Coatings and Films
Crystallography
Calcium carbonate
visual_art
visual_art.visual_art_medium
symbols
engineering
Selected area diffraction
0210 nano-technology
Raman spectroscopy
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 469
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........bbbbcc749bc5ffe224ed4ee65bf02284
- Full Text :
- https://doi.org/10.1016/j.apsusc.2018.10.270