Bertermann, R. and Kroeger, N. and Tacke, R. (2003) Solid-state Si-29 MAS NMR studies of diatoms: structural characterization of biosilica deposits. ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 375 (5). pp. 630-634. ISSN 1618-2642
Full text not available from this repository.Abstract
Four different diatom species (Chaetoceros debilis, Chaetoceros didymum, Cylindrotheca fusiformis, Nitzschia angularis) were studied by solid-state Si-29 MAS NMR spectroscopy. To determine the Q(2):Q(3):Q(4) ratios in the biosilica deposits of the diatoms, quantitative 29Si MAS NMR experiments were performed. This analysis did not reveal any differences regarding the molecular architecture of the silica (i.e. the degree of condensation of the SiOH units (2 equivalent toSiOH --> equivalent toSi-O-Siequivalent to + H2O)) from the different diatom species. However, complete cells showed significantly smaller Q(4):Q(3) ratios (1.8-1.9) than extracted cell walls (2.5-2.8), indicating the existence of intracellular pools of less condensed silica.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SILICON; METABOLISM; biomineralization; biosilica; cell wall; diatoms; solid-state NMR |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie > Lehrstuhl für Biochemie I |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Aug 2021 10:28 |
| Last Modified: | 24 Aug 2021 10:28 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39214 |
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