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Biochemical and Biophysical Research Communications, 2012
In RNA, function follows form. Mapping the surface of RNA molecules with chemical and enzymatic probes has revealed invaluable information about structure and folding. Hydroxyl radicals ((·)OH) map the surface of nucleic acids by cutting the backbone where it is accessible to solvent.
Lois Pollack +4 more
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In RNA, function follows form. Mapping the surface of RNA molecules with chemical and enzymatic probes has revealed invaluable information about structure and folding. Hydroxyl radicals ((·)OH) map the surface of nucleic acids by cutting the backbone where it is accessible to solvent.
Lois Pollack +4 more
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As(V) and As(III) reactions on pristine pyrite and on surface-oxidized pyrite
Journal of Colloid and Interface Science, 2012Reactions of As(III) and As(V) with pyrite were investigated using pristine pyrite (produced and reacted in a rigorously anoxic environment with P(O2)
Kwadwo Asare Osseo-Asare +2 more
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Journal of Hazardous Materials, 1994
Abstract The oxidation of pyrite ore in air was studied using a fixed-bed flow reactor. Under isothermal conditions, this oxidation showed a maximum rate during the initial stage and a linear decreasing rate thereafter, and the fractional oxidation versus time curves were in good agreement with a shrinking unreacted-core model. The oxidation rate was
Syunichi Sato +2 more
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Abstract The oxidation of pyrite ore in air was studied using a fixed-bed flow reactor. Under isothermal conditions, this oxidation showed a maximum rate during the initial stage and a linear decreasing rate thereafter, and the fractional oxidation versus time curves were in good agreement with a shrinking unreacted-core model. The oxidation rate was
Syunichi Sato +2 more
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Journal of the American Ceramic Society, 1969
The decomposition of pyrite was investigated in a thermo-balance. In neutral or reducing gases it decomposes between 550° and 700°C to volatile sulfur and ferrous sulfide. In oxygen it oxidizes in two stages: between 445° and 520°C, it forms sulfur dioxide and ferrous sulfide: between 610° and 660°C.
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The decomposition of pyrite was investigated in a thermo-balance. In neutral or reducing gases it decomposes between 550° and 700°C to volatile sulfur and ferrous sulfide. In oxygen it oxidizes in two stages: between 445° and 520°C, it forms sulfur dioxide and ferrous sulfide: between 610° and 660°C.
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Journal of the American Ceramic Society, 1966
Reactions occurring during the heating of pyrite depend on the atmosphere. Fe2O3 is formed under good oxidizing conditions; FeS is formed when the atmosphere is low in oxygen. This is shown by DTA, X‐ray diffraction, and total sulfur determinations on iron sulfides, on their mixtures with illitic clays and inert materials, and particularly on shales ...
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Reactions occurring during the heating of pyrite depend on the atmosphere. Fe2O3 is formed under good oxidizing conditions; FeS is formed when the atmosphere is low in oxygen. This is shown by DTA, X‐ray diffraction, and total sulfur determinations on iron sulfides, on their mixtures with illitic clays and inert materials, and particularly on shales ...
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2015
In this chapter I show how pyrite was at the heart of our early understanding of the composition of substances and how it was central to the acceptance of the revolutionary idea that substances have fixed compositions. This, in turn, was the evidential basis for the modern atomic theory. Taxonomists will argue that naming things accurately is important
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In this chapter I show how pyrite was at the heart of our early understanding of the composition of substances and how it was central to the acceptance of the revolutionary idea that substances have fixed compositions. This, in turn, was the evidential basis for the modern atomic theory. Taxonomists will argue that naming things accurately is important
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Analytica Chimica Acta, 1948
Abstract A brief survey is given of the recommended procedures for the analysis of pyrites and the results of control analyses.
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Abstract A brief survey is given of the recommended procedures for the analysis of pyrites and the results of control analyses.
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Nature, 1935
PYRITES (FeS2) in the form of small crystals and specks of a brassy-yellow colour may be found frequently in quartz. Four pieces of Brazilian quartz, containing pyrites inclusions, have now been found which are of unusual interest.
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PYRITES (FeS2) in the form of small crystals and specks of a brassy-yellow colour may be found frequently in quartz. Four pieces of Brazilian quartz, containing pyrites inclusions, have now been found which are of unusual interest.
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Pyritized Microfossils and Pyrite Framboids: Reply
Geology, 1974Mary Moorman, Carol Wagner Allison
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