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The scale of influence of substituents in paraffine monobasic acids The divalent oxygen atom,Hess, Raymond Washington. January 1918 (has links)
Thesis (Ph. D.)--University of Illinois, 1916. / Biographical.
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The scale of influence of substituents in paraffine monobasic acids The divalent oxygen atom,Hess, Raymond Washington. January 1918 (has links)
Thesis (Ph. D.)--University of Illinois, 1916. / Biographical.
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Low molecular weight organic acids in forest soilsHayden, John 12 November 1999 (has links)
Two studies concerning low molecular weight organic acids in soils
were conducted. In the first study, anion exclusion chromatography was
used to separate and identify 12 common organic acids, and the accuracy,
precision and detection limits of the method were determined. The method
was found to be sensitive and accurate to between 1.5 and 9 ��M,
depending on the acid in question. The stability of the selected acids was
examined, and the large concentration changes observed underscore the
importance of timely analysis of soil solutions. No significant interferences
were encountered in the analysis of two soil solutions. In the second
study, the reaction of a forest soil with oxalic acid at four concentrations
was monitored for a period of 96 hours. A large release of aluminum,
sulfate, and phosphate was observed, with the greatest release occurring
with the highest concentration of added oxalate. Solution aluminum
increased by up to a factor of twenty, and though [Al�����] values were
consistent with control by thermodynamic equilibrium with an amorphous
aluminum oxide phase, exchangeable Al appeared to be the source of the
increase. Sulfate increased abruptly at the start of the reaction and
continued to rise, though more slowly, throughout the study. Solution
phosphate was increased by up to four times and was maintained at the
elevated level throughout the study. Changes in both sulfate and
phosphate concentrations were attributed directly to exchange with oxalate.
The persistence of elevated phosphate concentrations after 96 hours
indicates that the effects of oxalate production by mycorrhizae could have
lasting effects on the nutrient status of a soil. / Graduation date: 2000
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Heterogeneous organic acid uptake on soot surfacesLevitt, Nicholas Paul 15 May 2009 (has links)
Atmospheric particulates have been known to act as cloud condensation nuclei
(CCN) and therefore their presence can indirectly affect important processes such as
global radiation balance through cloud formation. Soot particles are well known to be
atmospheric constituents, but the hydrophobic nature of fresh soot likely prohibits them
from encouraging cloud development. Soot aged through contact with oxygenated
organic compounds may become hydrophilic enough to promote water uptake. In this
study I have observed the interaction between a number of carboxylic acids and soot from
different fuel sources and formation mechanisms. A low pressure fast flow reactor was
used to control the contact between the solid phase soot and gas phase organics, while
chemical ionization-mass spectrometry was utilized to monitor concentrations of gas
phase organics. Most acids irreversibly deposited on the soot surfaces, and the uptake
coefficient was measured in the wide range of 9.0 x 10-4 to 1.0 x 10-1. The Brunauer,
Emmett, and Teller (BET) surface areas of the soots were measured and the soot bulk and
surface chemical compositions were investigated with Fourier transform infrared (FTIR)
spectroscopy and attenuated total reflection (ATR) spectroscopy to help explain
differences in uptake. By comparing the mono and dicarboxylic acids and the
information gathered from soot physiochemical properties I have discussed possible
uptake mechanisms.
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Efforts toward the total synthesis of 7-deoxyzaragozic acic A and galtamycinoneEscobar, Maya. January 2002 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2002. / Vita. Includes bibliographical references. Available also from UMI Company.
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Power function determination for sourness and time-intensity measurements of sourness and astrigency for selected acids /Straub, Angela Marie. January 1989 (has links)
Thesis (M.S.)--Oregon State University, 1992. / Typescript (photocopy). Includes bibliographical references (leaves 152-157). Also available on the World Wide Web.
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A study of the conductivity and dissociation of organic acids in aqueous solution between zero and thirty-five degrees ...Wightman, Eugene Pinckney, January 1911 (has links)
Thesis (Ph. D.)--Johns Hopkins University. / Biographical.
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A study of the conductivity and dissociation of certain organic acids in aqueous solution at different temperatures ...Springer, Alfred, January 1912 (has links)
Thesis (Ph. D.)--Johns Hopkins University, 1912. / Biographical.
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The conductivity and dissociation of organic acids in aqueous solution at different temperatures ...White, George Frederic, January 1910 (has links)
Thesis (Ph. D.)--Johns Hopkins University. / Biographical.
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A study of the peroxides of organic acids ...Clover, Alphonso Morton, January 1904 (has links)
Thesis (Ph. D.)--University of Michigan.
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