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Showing 1 to 20 of 94 for “"Sulfates"”.
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Structural Analysis of Heparins and Heparan Sulfates
Made available in DSpace on 2014-12-14T04:27:34Z (GMT). No. of bitstreams: 1 7606959.pdf: 5085790 bytes, checksum: 6d990a720384dd6e87d1b8e9a4752b46 (MD5) Previous issue date: 1975
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Ion Pairing in Aqueous Metal Sulfates and Platinum Group Metal Ammonium Solutions
… pair formation mechanisms for important metal sulfates in aqueous media are presented. Radial and spatial distribution functions calculated for several ion pair species reveal that the transition from free ions to contact ion pairs involves the loss of between one to two water molecules from …
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The Substrate Specificity of Testicular Hyaluronidase and Its Use in Sequencing Chondroitin Sulfates
Testicular hyaluronidase was used to study the distribution of sulfated disaccharide units along chondroitin sulfate chains. The transglycosylation activity of the hyaluronidase was eliminated by use of excess levels of a second enzyme, (beta)-glucuronidase to remove all nonreducing terminal …
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Synthesis and synthetic transformations of allylic alcohols, epoxy alcohols, and 1,2-cyclic sulfates
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1988.
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A comparison of theoretical and observed bridging bond lengths and angles in condensed phosphates and sulfates
… angle averages observed in solid phosphates and sulfates. Potential energy curves calculated for both molecules relate the observed bridging bond length and angle variations in their solids. Orbital population analyses for both molecules suggest that all five 3d-orbitals play a role in bonding …
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Étude de la formation de l'ettringite secondaire avec divers types de sulfates alcalins et dosages en gypse
… de l'ettringite secondaire selon divers types de sulfates alcalins et dosages en gypse sur des mélanges effectués avec des ciments broyés en laboratoire. Les mélanges avec de l'aphtitalite produisent dans la majorité des cas moins d'expansion et ceux faits avec de l'amanite et de la syngénite ont …
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Supplemental Trace Minerals (Zn, Cu, and Mn) as Sulfates or Hydroxy Trace Mineral Sources for Beef Heifers
<p>Crossbred heifers (n = 286, 255 ± 4.5 kg initial BW, 295 ± 16.5 d of age) were used over a 2-yr period to determine the effects of mineral source on beef heifer development at 2 locations (n = 71 and n = 72, Fayetteville, blocks 1 and 4; n = 72 in each of 2 breeding groups, Batesville, blocks 2 …
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Influence des sulfates alcalins sur l'hydratation, la fluidité et les résistances à la compression des ciments à basses teneurs en alcalis
… de travaux de recherche sur l'influence des sulfates alcalins dans le ciment. Par la suite, on décrit le programme expérimental suivi de la caractérisation des matériaux utilisés. Les descriptions des procédures d’essais précèdent la présentation des résultats expérimentaux obtenus. …
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An assessment of the environmental effects of coal ash effluents using structural and functional parameters of aufwuchs communities
… selected levels of fly ash, heavy metals, or sulfates was compared to a natural stream (Adair Run) influenced by effluent from the fly ash settling basin at Glen Lyn, Virginia. Aufwuchs communities colonizing glass microscope slides were monitored for dry weights, ash-free dry weights, …
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Sulfate Leaching from Sulphur Binding Agents in Experimental Asphalt Pavement, Angelina County, Texas
… treatments had no overall effect on the soil sulfates. Four layers of a single aggregate of hot sand increased the quantity of sulfates in the soil by 107%. I recommend the use of sulphur-asphalt binder with the type "D" base material throughout construction or when two layers of the type "D" …
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Effects of adding wash tower effluent to Ano Liossia landfill to enhance bioreaction c by Olympia Galenianou.
… the generation of methane, and the reduction of sulfates into sulfides. The water mass balance was performed using the method of Thornthwaite and the result indicated that the leachate collection facility at Ano Liossia landfill would be able to handle the additional leachate. The …
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Immunoelectrophoretic Behavior of a Glycoprotein Fraction Isolated From the Fetal Calf Palate
… proteinpolysaccharides containing the hondroitin sulfates A, B, and C, the keratan sulfates, and in some cases heparin and heparan sulfate. Chemically, the acid mucopolysaccharides are repeating polymers of a hexosamine and uronic acid, although the keratan sulfates are known to contain galactose …
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Defluoridation of typical eastern Virginia groundwater
… further testing of filtered samples is needed. Sulfates were low in the raw water, but buildup with the addition of alum. No tests were made for sulfates in the treated water. Tests of the sludge produced by the addition of alum and lime indicated high volumes, low solids and very poor …
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Élimination du cobalt des électrolytes de sulfate de zinc par cémentation électrochimique
… ont confirmé la présence d'une mince couche de sulfates basiques de zinc-~< 1 µ- recouvrant la surface du zinc et des dépôts de cobalt dont le composé majoritaire est le ZnSO4 • 3Zn(OH)2 • 4H20. Pour concilier les résultats des différentes approches statistiques et des analyses de surface des …
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Sulfate attack on cement paste with volcanic ash : durability analysis
… attack, specifically to sodium and magnesium sulfates. Pozzolanic volcanic ash can be a viable partial substitute for Portland Cements to develop cement paste compositions for superior sulfate resistance with potential for durability and sustainable solutions. Pumiceous volcanic ash was used …
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Using 34-S as a Tracer of Dissolved Sulfur Species from Springs to Cave Sulfate Deposits in the Cerna Valley, Romania
… which possess relatively large deposits of sulfates and exotic morphologic features that suggest speleogenesis by sulfuric acid. 𝛅34S of the sulfates relates to sulfide isotopic values from the springs, showing that the dissolved sulfide (upon oxidation) forms sulfuric acid s that reacts …
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Recycling neodymium-iron-boron magnet alloy by direct sulfation with SO₂ gas
… Sulfuric acid is used to convert the metals to sulfates, which are then roasted to produce a calcine of neodymium sulfate and iron oxide. The calcine could then be leached with water to create a pure neodymium solution. To further investigate the selective sulfation reaction, direct sulfation …
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Chemistry of carbonaceous aerosols : studies of atmospheric processing and OH-initiated oxidation
… and organics. Other major components included sulfates, soil/dust and heavy metals indicative of industrial emissions. Single particle analysis confirmed the prevalence of soot particles; our evidence suggests they quickly became internally mixed with sulfates and other inorganic compounds in a …
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Fluids in Planetary Systems
… on the conditions under which secondary sulfates are likely to have formed. The results of this study indicate that jarosite is likely to form as a result of water-limited chemical weathering of basalts. Magnesium sulfates are only predicted to form as a result of evaporation. This …
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