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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.
31

Synthesis and Study of the Hetero-analogues of Benzocyclobutenoe

Chiu, Shao-Jung 06 July 2000 (has links)
Flash Vacuum Pyrolysis of each proper precussors gave highly reactive intermediates : heteroanalogues of Benzocyclobutenoe, imino-compounds, and ketene compounds. The reactive intermediates could be used in many organic synthesis.
32

Investigation on the Electric-Arc Characteristics and the Formation Mechanism of Erosion for DC Silver Contacts in Vacuum.

Hu, Edwin 02 July 2001 (has links)
In this research, a static electric contact tester with a vacuum system is used to inverstigate the efedts of experimental parameters, such as air pressure, input voltage and current, contact material, and the gap between the contacts, on the electric-arc characteristics and the erosion debris type for the electric contacts of silver (Ag). The experiments are conducted under various experiment parameters, and the erosion debris is collected. After each experiment, the erosion debris will be calculated and observed to investigate the difference between erosion particles under various experiment conditions. Moreover, according to the results of the metallic phase and gaseous phase arc duration and the erosion particle type under various air pressures and the gaps, the electric-arc criterion and the erosion mechanism of DC electrical contacts will be established to provide the domestic electrical contact manufacture in improving the research and development technique of electrical contacts, and the design reference of super precision environment¡Xclean room
33

Ptrolytic Study of 2-(azidoethyl)pyridine and 1-methyl-2- (2-azidoethyl) pyrrole

Chen, Li-Hui 04 July 2002 (has links)
Flash vacuum pyrolysis(FVP) of 2-(azidoethyl)pyridine, via a nitrene intermediate, gave two products, a dimer (1,2-di(2-pyridinyl)-ethane) and a trimer (3,5-di(2-pyridyl)-pyridine). However by the same route, FVP of 1-methyl-2- (2-azidoethyl) pyrrole produced only a dimer (1,2-di(1-methylpyrrol-2-yl)ethane).
34

The casimir effect /

Lang, Andrew January 1998 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 1998. / Typescript. Vita. Includes bibliographical references (leaves 84-85). Also available on the Internet.
35

The casimir effect

Lang, Andrew January 1998 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 1998. / Typescript. Vita. Includes bibliographical references (leaves 84-85). Also available on the Internet.
36

Chopper stabilization of a direct amplifier

Haville, George Douglas, 1926- January 1958 (has links)
No description available.
37

Vacuum refining copper melts

Danovitch, David. January 1982 (has links)
No description available.
38

Vacuum refining molten aluminum

Dimayuga, Francisco Cruz, II. January 1986 (has links)
No description available.
39

An investigation of n magnetically-coupled vacuum tube circuits

Phillips, Charles Lamar 08 1900 (has links)
No description available.
40

A screen-grid coupled direct-current amplifier

Jones, William Benjamin 08 1900 (has links)
No description available.

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