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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
141

The catalytic action of neutral salts : the effect of normal alkali sulphates on alkali acid sulphates in the ketonic splitting of ethyl acetoacetate

Goodhue, Elbridge Alvah. January 1927 (has links) (PDF)
Thesis (M.S.)--University of Missouri, School of Mines and Metallurgy, 1927. / The entire thesis text is included in file. Typescript. Illustrated by author. Title from title screen of thesis/dissertation PDF file (viewed October 21, 2009) Includes bibliographical references.
142

On the mechanism of ammonium ion uptake by maize roots

Becking, Jan Hendrik, January 1956 (has links)
Thesis--Leiden. / Vita. Bibliography: p. 75-79.
143

Solubility and fractionation of acid-precipitated casein using salts of certain organic acids

Gould, Stephen Phillip, January 1937 (has links)
Thesis (Ph. D.)--Columbia University, 1937. / Vita. Bibliography: p. 47-49.
144

Electrolytic reduction of nitro compounds in concentrated aqueous salt solutions

Gerapostolou, Basil George, January 1935 (has links)
Thesis (Ph. D.)--Columbia University, 1935. / Vita.
145

The adsorption of silver salts by silver iodide

Beekley, John Sherman. January 1924 (has links)
Univ., Diss--Princeton.
146

A kinetic template effect in arylphosphonium salt formation

Cropper, Paul Edward January 1988 (has links)
This thesis describes studies of a "kinetic template effect" which assists the formation of arylphosphonium salts from aryl halides and tertiary phosphines in the presence of a transition metal halide catalyst in refluxing ethanol. The "kinetic template effect" arises from the presence in the aryl halide of a limited range of orthosubstituents capable of intramolecular coordination with the metal at a critical stage of the reaction. In Chapter One, the "kinetic template effect" is compared with the better known "thermodynamic template effect". Earlier work on related "kinetic template effects" in the formation of aryl-phosphorus bonds is reviewed. The evidence for the possible involvement of aryl-metal intermediates in such reactions is also discussed. Chapter Two is concerned with the design and synthesis of potential template molecules. A model is proposed for the features necessary in the template substituent in terms of the nature and position of the donor atom or group essential for the replacement of the ortho-halogen under mild conditions. Chapter Three describes a kinetic study of the nickel (II) catalysed reactions of ortho-haloaryl Schiff's base and ortho-haloarylazo-dyestuff templates with tertiary phosphines. A rate law is deduced which indicates a first order dependence in each reactant, i.e. rate a [template] [phosphine] [catalyst], an overall third order expression. Rate studies also indicate that the nature of the orthohalogen is important, the order of replacement being I > Br > Cl. The effects of substituents remote from the ortho-haloaryl template are also considered. A mechanistic scheme consistent with the rate data is proposed. The X-ray crystal structures of two arylphosphonium salts derived from template aryl halides are discussed in Chapter Four, providing unequivocal proof that the position of replacement of halogen in substrates bearing more than one replaceable halogen, in different positions, is ortho with respect to the template donor group.
147

The use of nanofiltration membrane in desalinating brackish water

Hajarat, Rasha January 2010 (has links)
No description available.
148

Bis Ammonium Salts of Dialkylaminoalkoxypropionitriles

Woods, Roy Jack 08 1900 (has links)
This paper concerns the preparation of some bis derivatives of dialkylaminoalkoxypropionitirles from trimethylene, hexamethylene, octomethylene, and decamethylene bromides. These compounds are to be tested for curariform activity and anesthetic values by Parke, Davis and Company.
149

Reactions of 1, 2-dithiolium cations and formation of metal thio-l-dicarbonyl compounds

Shobsngob, Sujin. January 1981 (has links)
No description available.
150

The Ammonification and nitrification of cottonseed meal and the nitrification of ammonium sulphate

Knudsen, Harold R. 01 January 1930 (has links) (PDF)
No description available.

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