• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 743
  • 262
  • 87
  • 58
  • 20
  • 18
  • 18
  • 12
  • 8
  • 8
  • 7
  • 7
  • 7
  • 7
  • 7
  • Tagged with
  • 1481
  • 573
  • 534
  • 238
  • 153
  • 113
  • 100
  • 99
  • 98
  • 92
  • 89
  • 87
  • 80
  • 80
  • 72
  • 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.
91

Reactions of tritium atoms with frozen hydrocarbons

Shores, Richard Dale. January 1962 (has links)
LD2668 .T4 1962 S46
92

Synthesis and polymerizations of nitrile substituted quinodimethanes

Brandt, Martin William January 1988 (has links)
The spontaneous polymerization behavior of an acceptor substituted quinodimethane was investigated. High molecular weight homopolymers of 7,8,-di(ethoxycarbonyl)-7,8-dicyanoquinodimethane (DEDCQ) or copolymers of DEDCQ-styrene (St) and DEDCQ-p-methoxystyrene (p-MeOSt) were formed spontaneously in chloroform containing acetic acid. All polymerizations occurred by a radical mechanism. High molecular weight polymers formed at low conversion. Radical homopolymerization of DEDCQ was promoted by ambient light or heat. DEDCQ-p-MeOSt copolymerizations yielded alternating copolymers, which formed rapidly relative to the DEDCQ homopolymers and copolymers (rich in styrene). All of these polymerizations are thought to begin with a bond forming mechanism and propagate by polyaddition. A new acceptor group substituted quinodimethane was synthesized, characterized and copolymerized with electron donating monomers. Oxidation of the dianion of α, α'-dicyano-α, α'-diphenyl-p-xylene yielded 45% 7,8-dicyano-7,8-diphenylquinodimethane. In solution this compound exists in both the trans and cis forms but forms a sharply melting crystalline solid. It was resistant to homopolymerization but did form low molecular weight copolymers with electron rich aromatic monomers.
93

Laminar flamelet modelling of turbulent combustion chemistry for practical fuels

Askari-Sardhai, A. January 1987 (has links)
No description available.
94

Isolation of PAH degrading microorganisms and preliminary studies on treatment technologies for PAH bioremediation in contaminated soil

Kelly, Steven Alan January 1999 (has links)
No description available.
95

Optimisation of chromatographic separations

Othman, M. Y. B. January 1984 (has links)
No description available.
96

The effect of different rainfall regimes and drainage conditions on the mobility of PAHs from soil contaminated with coal tar

Pieltain, Francoise Joelle Marie January 1995 (has links)
No description available.
97

N-butane oxidation on vanadium-phosphorus-oxide catalysts

Gobina, E. N. January 1990 (has links)
No description available.
98

Chromatographic measurements of ocean-atmosphere chemical exchange

Gist, Nicola January 2002 (has links)
No description available.
99

Microbial production and utilization of epoxides

Sharman, Ajay K. January 1992 (has links)
No description available.
100

Femtosecond laser mass spectrometry applied to aromatic molecules in gas and solid phase

Robson, Lynne January 2003 (has links)
No description available.

Page generated in 0.0482 seconds