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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.
51

Derivatives of 5-aceto carvacryl methyl ether Relation between molecular structure and odor of 1,2,4,5 substituted benzenes ...

Goldstein, Israel, January 1927 (has links)
Thesis (Ph. D.)--Columbia University, 1928. / Vita. Bibliography: p. 23.
52

Der mikrobielle Abbau von Etherverbindungen unter besonderer Berücksichtigung von Aralkyl- und Alkylethern

Kim, Yong-Hak. January 1999 (has links)
Stuttgart, Univ., Diss., 1999.
53

Reductive detoxification of hexavalent chromium and degradation of methyl tertiary butyl ether and phthalate esters

Xu, Xiangrong, January 2005 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2005. / Title proper from title frame. Also available in printed format.
54

Derivatives of 5-aceto carvacryl methyl ether. Relation between molecular structure and odor of 1,2,4,5 substituted benzenes ...

Goldstein, Israel, January 1927 (has links)
Thesis (Ph. D.)--Columbia University, 1928. / Vita. Bibliography: p. 23.
55

Synthesis and Properties of Novel Cage-Annulated Crown Ethers

Huang, Zilin 05 1900 (has links)
Three cage-functionalized polyoxacrown ethers (9, 10 and 12) and four novel cage-functionalized polyoxamonoazacrown ethers (18, 20, 25 and 29) that contain 3,5-disubstituted-4-oxahexacyclo[5.4.0.02,6.03,10.05,9.08,11]dodecane ("oxahexacyclic") moiety have been synthesized and their respective alkali metal picrate extraction profiles along with that of three analogues 13, 14 and 21 have been obtained. The observed avidities and selectivities of the host molecules toward complexation and transport of alkali metal picrates can be related to the size and shape of their respective macrocyclic cavity and the number of donor atoms. The effect of N-alkyl substitution on the complexation properties of azacrown ethers has been studied. The avidity of N-Et azacrown ethers toward complexation with alkali metal cations is generally higher than that of the corresponding non-N-alkylated hosts. However, the presence of an N-Et group appears to have a negligible effect upon their relative selectivities in their regards. The effect of pH on extraction process was studied; it was thereby determined that the alkali metal picrate extraction experiments are best performed at high pH (ca. 11-12).
56

The reaction of monochloromethyl ether with organometallic compounds

Tang, Philip Jen-chien 10 July 2010 (has links)
1. The reactions of monochlormethyl ether with the magnesium cadmium and zinc derivatives of normal propyl and isopropyl halides were investigated. 2. In both the normal propyl and iso-propyl aeries, the yields of the expected condensation products RCH₂OCH₃ appeared in the order RMgX>R₂Zn>R₂Cd. 3. The primary organometallic compounds reacted with monochlormethyl ether in higher yields than did the corresponding secondary compounds. 4. A new method was developed for preparing a zinc-copper couple by heating a mixture of zinc dust and powdered cupric citrate under an atmosphere of nitrogen. 5. This method gave a couple superior in laboratory use to the zinc-copper couples how generally employed. / Master of Science
57

A new method for the preparation of alkylnaphthyl ethers and sulfides

Chen, Edward Ying-shih 01 May 1972 (has links)
The reaction of monohalonaphthalenes with metal alkoxides and mercaptides in a solvent mixture of the corresponding alcohol and dimethyl sulfoxide (DMSO) has been studied. These reactions are convenient methods for the preparation of alkylnaphthyl ethers and sulfides. Only direct nucleophilic substitution was observed in the reactions of bromonaphthalenes with sodium methoxide and sodium nbutyl mercaptide. The reaction of fluoronaphthalene with potassium t-butoxide also proceeded by way of direct nucleophilic substitution rather than the 1,2-dehydronaphthalene intermediate as in the reactions of bromonaphthalene with potassium t-butoxide. The use of a base which is weaker than t-butoxide can change the apparent reaction mechanism from the dehydronaphthalene to direct nucleophilic substitution.
58

Liquid crystal polymers containing crown ether ligands

Rodenhouse, Randall Alan January 1991 (has links)
No description available.
59

Synthesis and Characterization of Amphiphilic Polymers

Collette, Elisabeth Anne January 2013 (has links)
No description available.
60

A Computational Study on the Effect of Injection Strategy on Emissions in a DME Fueled CI Engine

Godavarthi, Bhavya Sree January 2015 (has links)
No description available.

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