Sulfur SAD

Buckle, A. M.. Fersht, A. R. (1994). Biochemistry, Vol 33, No.7, pp. 1644-1653 Chance, M. (2008). Mass Spectrometry Analysis for Protein-Protein Interactions and Dynamics, Wiley-VCH, ISBN 978-0470-2588-66,Weinheim, Germany Cianci, M., Helliwell, J. R. Suzuki, A. (2008). The interdependence of wavelength, redundancy and dose in sulfur SAD experiments. Acta Cryst. Vol D64, (November 2008),pp 1196-1209... 

Sulfuric acid is the chemical force behind primary quintessential processes that end up creating what we call modem civilization. So, sulfur is the stealthy powerhouse of our modem world. Sulfuric acid became affectionately (at least to sulfur enthusiasts) known as the old warhorse of chemistry. An applicable nickname for sulfur would have been Xanthus, the mythological horse that pulled Achilles chariot into battle and is also the Greek word for yellow Though so essential, sulfur does not usually end up in the final product. What then becomes of the sulfur Sadly, le roi du sol is often discarded as a waste product, such as... 

The size and distribution of pores and the size, distribution, and identity of minerals in coal specimens from an eastern Kentucky splint coal and the Illinois No. 6 coal seam were determined by means of transmission electron microscopy (TEM) and analytical electron microscopy (AEM). The observed porosity varies with the macerals such that the finest pores (<2-5 nm) are located in vitrinite, with a broad range of coarser porosity (40-500 nm) associated with the macerals exinite and inertinite. Elemental analyses, for elements of atomic number 11 or greater, in conjunction with selected area diffraction (SAD) experiments served to identify the source of the titanium observed in the granular material as the mineral rutile. Only sulfur could be de-tected in the other coal macerals. Dark-field microscopy is introduced as a means for determining the domain size of the coal macerals. This method should prove useful in the determination of the molecular structure of coal. 

To use sulfur as a phasing probe in S-SAD, several inherent problems must be addressed. First, because the sulfur K absorption edge is at 5.02 A, well outside the... 

The conditions for stability of chemisorbed sulfur on the surface of metals can be predicted using a formalism that was developed for the calculation of potential-pH diagrams of adsorbed species. Such diagrams have been calculated for Sads on iron (Marcus and Protopopoff, 1990), nickel... 

Ferrous sulfate 20%, sulfuric acid 19.5%, titanium dioxide 10% as sulfate, solids 2-3%, titanium (3) ion 1.7 g/1 as sulfate, hydrogen sulfide trace (Dorr settling tank) Metal F 122- 158 1 - - 5.12 ll.Sad ... 

Note Mad- air dry base moisture Ad- dry base ash Vdar dry base volatile FCad- air dry base fixed carbon Sad- air dry base total sulfur... 

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