Silica fragmentation

Sandstone Building Mainly silica Conglomerate of rounded silica fragments consolidated within calcium carbonate... 

The properties of small silica fragments which may be critical to the synthesis process are also difficult to study via experimental methods. Cluster calculations, usually based on... 

Table 9.1. Average and correct match values and relative ranking positions for different in silica fragmenters averaged over the 100 (or 27) spectra from Subsection 8.4.2.

Wolf, S., Schmidt, S., Muller-Hannemann, M., Neumann, S. (2010) In silica fragmentation for computer assisted identification of metabolite mass spectra. BMC Bioinf. 11, 148. 

An easy, silica gel-promoted 6-endo cyclization of y-epoxy alcohol 32 to pyran 33, followed by acid-catalyzed spiroketalization of the keto diol 34, afforded the common tricyclic spiroketal fragment 35 of lituarines A, B, and C (Scheme 8.8) [20b],... 

Silica, Si02, is a hard, rigid network solid that is insoluble in water. It occurs naturally as quartz and as sand, which consists of small fragments of quartz, usually colored golden brown by iron oxide impurities. Some precious and semiprecious stones are impure silica (Fig. 14.36). Flint is silica colored black by carbon impurities. 

Strege, M. and Lagu, A., Separation of DNA restriction fragments by capillary electrophoresis using coated fused silica capillaries, Anal. Chem., 63, 1233, 1991. 

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