Capsular silica

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Journal Article
Published: 01 June 1929
American Mineralogist (1929) 14 (6): 222–226.
...Frederick A. Burt Abstract Three specimens of capsular silica have been collected by the writer from the Quaternary formations of Brazos County, Texas. Clastic fragments of petrified wood are very common in these formations, and much opal and botryoidal chalcedony is found as veins...
Journal Article
Published: 01 March 2005
Journal of the Geological Society (2005) 162 (2): 323–331.
...Vernon R. Phoenix; Robin W. Renaut; Brian Jones; F. Grant Ferris Abstract Siliceous sinter, loose sediments, and suspended flocs in Champagne Pool, an anoxic hot (75 °C) spring at Waiotapu, New Zealand, are composed of opaline silica and metal-rich sulphides that contain many well-preserved...
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Journal Article
Published: 01 March 2004
Journal of Sedimentary Research (2004) 74 (2): 314–317.
... or, in some cases, do not calcify at all. This sharply contradicts our observations showing strong permineralization of the mats both with CaCO 3 and silica (e.g., Kempe and Kazmierczak 1993 , Pl. 6, figs. 3-6). Mat samples we took at the end of dry season 1986 demonstrate that calcification...
Journal Article
Published: 01 September 2005
Journal of Sedimentary Research (2005) 75 (5): 897–906.
... skeleton; radiolarian skeletons are mostly dissolved and visible as whitish spots of silica on the indistinctly laminated microbialitic background. Figure 2 Geologic map of the northern part of the Bardzkie Mountains (Sudetes, southwestern Poland) and stratigraphic section of the early Paleozoic...
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Journal Article
Published: 01 June 2010
Clays and Clay Minerals (2010) 58 (3): 340–350.
... whereas in the NaMW it was 2.10. Such behavior may be compared with results reported for other lamellar compounds ( Pernyeszi and Dékány, 2003 ); in montmorillonite and illite the fractal dimensions are 2.83 and 2.58, respectively, and in kaolinite it is 2.12 but in silica it is 2.01. In the present...
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Journal Article
Published: 01 June 2005
Clays and Clay Minerals (2005) 53 (3): 224–233.
.... The FTIR spectrum of bio-films showed bands characteristic of organics in contrast to the sediment samples. The absorption band at 1100 cm −1 was probably due to organic P–O. Either nucleic acids or cell-wall and capsular lipids containing polysaccharides could be responsible for these features. The cell...
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Journal Article
Published: 01 September 2007
Micropaleontology (2007) 53 (5): 371–389.
..., figure 7 , all showing three conjoined individuals forming a “mini colony”. The question remains, when the central nucleus divides into two daughter cells, how does the one daughter cell escape from the mother skeleton? We assume, as indicated by Anderson and Gupta (1998) that the central capsular wall...
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Series: SEPM Special Publication
Published: 01 January 2000
DOI: 10.2110/pec.00.66.0133
EISBN: 9781565761889
...Introduction hydrothermal biomineralization Iron Hydroxides Amorphous Silica Iron Silicates Discussion Abstract: Precambrian banded iron-formations (BIPs) are chemical sediments of hydrothermal origin and consist of Fe-rich minerals with alternating layers of chert. Because...
Journal Article
Published: 01 February 1995
Journal of the Geological Society (1995) 152 (1): 131–140.
... by diatoms for locomotion (Edgar & Pickett-Heaps 1984) and the more refractory capsular material which surrounds bacteria and cyanobacteria. This material may leave traces which can be used in the interpretation of past structure (Knoll 1989). Thus, the analysis of matrix structure in modern assemblages...
Journal Article
Published: 01 January 2021
American Mineralogist (2021) 106 (1): 69–81.
... were carried out as previously described ( York et al. 1986 ; Merkle and Poppe 1994 ). GC/MS analysis of the TMS methyl glycosides was performed on an Agilent 6890N GC interfaced to a 5975B MSD, using an Agilent DB-1 fused silica capillary column (30 m × 0.25 mm ID). * E-mail: hfxu...
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Journal Article
Published: 01 February 2015
American Mineralogist (2015) 100 (2-3): 483–494.
... is associated with the cell surface and includes sheaths, capsular polymers, condensed gel, loosely bound polymers, and attached organic materials, while soluble EPS, including soluble macromolecules, colloids, and slimes, is loosely associated with the cells and predominantly generated by sloughing off from...
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Series: European Mineralogical Union Notes in Mineralogy
Published: 01 January 2000
DOI: 10.1180/EMU-notes.2.11
EISBN: 9780903056427
... its own suite of minerals. They can be thought of as the human subset of the minerals produced by living creatures. The minerals in humans are analogous to the calcium carbonates that form the shells of clams and oysters, or the silica phytoliths found in grasses ( Lowenstam & Weiner, 1989...
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Series: Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP336.6
EISBN: 9781862395848
... Polynesian microbial mats (Kopara) were characterized by chemical analysis ( Richert et al. 2005 ). It was found that both capsular and released EPS consisted of 7–10 different monosaccharides with neutral sugars dominating. For example, fucose, xylose and glucose were present in all EPS fractions...
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