Sulfate possible sources

Possible sources of sulfate include diffusion from the water column, hydrolysis of sulfate esters, and oxidation of reduced sulfur. Diffusion of S042" into sediments cannot supply sulfate at the measured rates of sulfate reduction. Rates of sulfate diffusion into sediments generally are 2 orders of... 

These results are in disagreement with the foregoing findings that only sulfate and hydroxyl groups are produced by persulfate initiator, particularly with bicarbonate buffer. There are several possible sources of the carboxyl groups found by others (i) hydrolysis of sulfate groups followed by oxidation ... 

Sulfur. There are two possible sources of sulfate ion in the groundwater ... 

Compare the spatial distribution pattern of sulfate and nitrate deposition in North America in 1980s and 1990s. Describe the possible sources of S and N pollution. 

Takayanagi, R., K. Goto, S. Suzuki, S. Tanaka, S. Shimoda, and H. Nawata (2002). Dehy-droepiandrosterone (DHEA) as a possible source for estrogen formation in bone cells Correlation between bone mineral density and serum DHEA-sulfate concentration in postmenopausal women, and the presence of aromatase to be enhanced by 1,25-dihydroxyvitamin Dj in human osteoblasts. Mech. Ageing Dev. 123, 1107-1114. 

W.P. Iverson. Possible source of a phosphorus compound produced by sulfate-reducing bacteria that cause anaerobic corrosion of iron. Materials Performance, Vol. 37, No. 5, pp. 46-49,1998. 

Iverson WP (1998) Possible source of a phosphorus compound produced by sulfate-reducing bacteria that cause anaerobic corrosion of iron. Mater Perform 37(5) 46-49 Videla HA, Herrera LK, Edyvean RG (2005) An updated overview of SRB induced corrosion and protection of carbon steel. Paper No. 05488, Corrosion 2005, NACE International Smith JS and Miller JDA, (1975) Nature of Sulphides and Their Corrosive Effect on Eer-rous Metals A Review, British Corrosion Journal, Vol. 10, No. 3, pp. 136-143 Hang DT (2003) Microbiological study of the anaerobic corrosion of iron. PhD Dissertation, University of Bremen, Bremen, Germany... 

To attain the quantitative detectability that the method is capable of, stringent techniques must be employed and all possible sources of sulfur contamination must be eliminated. In particular, cleaning agents, such as common household detergents which contain sulfates, should be avoided. 

DMS has been observed in the marine atmosphere since the early 1970s, but it was not until the mid-1980s that there was interest in this gas as being a natural source for sulfate CCN. Sulfate aerosols are, in number terms, the dominant source of CCN. The major role clouds play in the climate system leads to possible climatic implications if changes to DMS production occurred. Furthermore, the dependence of this production on environment conditions means that scope for a feedback process arises this feedback is called the Charlson hypothesis. ... 

The primary constituents to be measured are the pH of precipitation, sulfates, nitrates, ammonia, chloride ions, metal ions, phosphates, and specific conductivity. The pH measurements help to establish reliable longterm trends in patterns of acidic precipitation. The sulfate and nitrate information is related to anthropogenic sources where possible. The measurements of chloride ions, metal ions, and phosphates are related to sea spray and wind-blown dust sources. Specific conductivity is related to the level of dissolved salts in precipitation. 

Of the four possible 5-deoxy-pent-4-enofuranoses, the D-erythro-isomer was of interest as a potential source of derivatives of L-lyxofuranose. For this purpose, a vinyl ether having the D-en/ hro-configuration has been prepared from derivatives of D-ribose. Condensation of D-ribose with acetone in the presence of methanol, cupric sulfate and sulfuric acid at 30°C., as described by Levene and Stiller(30) afforded a sirupy product consisting mainly of methyl 2,3-O-isopropylidene-D-ribofuranose (40). Treatment of a pyridine solution of the sirup with tosyl chloride... 

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