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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.

The influence of tonic labyrinthine stimulation upon sensory awareness and soles motoneuron excitability in normal man

Dalzell, Mary-Ann January 1985 (has links)
No description available.

Soziale Strukturen der organisierten Forschung Trägerschaft und Organisation ausseruniversitärer Forschungseinrichtungen.

Hetzler, Hans Wilhelm. January 1900 (has links)
Habilitationsschrift--Technische Universität Berlin. / Bibliography: p. 193-199.

The development of research in the social sciences as an academic function

Sprouse, Martha Stennis. January 1944 (has links)
Thesis (M.A.)--University of Wisconsin--Madison, 1944. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves [134]-138).

Japanese R & D an organizational analysis /

Nedeljkovich, Mihajlo. January 1993 (has links)
Thesis (Ph. D.)--Ohio University, 1993. / Includes bibliographical references (leaves 249-298).

Systemanalytische Grundlagen der Forschungspolitik

Kirsch, Guy, January 1900 (has links)
Habilitationsschrift - Cologne. / Bibliography: p. 198-204.

Research and development cooperation in an open economy

Rutsaert, Pauline M. J. C., January 1994 (has links)
Thesis (Ph. D.)--Cornell University, 1994. / Vita. Includes bibliographical references (leaves 472-485).

Aspects of the structure and function of some gastropod columellar muscles (Mollusca)

Frescura, Mandy January 1991 (has links)
The columellar muscle of both limpets and coiled shell gastropods is of the paramyosin smooth type. Collagen forms an integral part of the musculature constituting about 35% of the tissue. In limpets, muscle organisation is typical of a muscular hydrostat. Tightly packed blocks of muscle, dense arrays of cross-linked collagen, large muscle cells (9 µm diameter) and thick filaments (70 nm diameter, 30 µm long) produce a tough, relatively rigid but powerful muscle. In coiled shell gastropods, muscle organisation is intermediate between a muscular and a fluid hydrostat. Finer muscle cells (6 µm diameter), thick filaments (60 nm diameter) and a loose intercellular network of collagen interspersed with fluid vesicles are features of a more pliable and extensible muscle. In addition, ultrastructural differences, such as larger numbers of mitochondria and sarcolemmal invaginations distinguish the tarsal from the columellar muscle in both limpets and coiled shell gastropods. About 25% of muscle cells in most species examined, contain a novel arrangement of thin filaments with periodic electron-dense regions. These are similar in appearance to intrafusal cells and stress-fibres of non-muscle cells. Structural analysis of isolated filaments, optical diffraction and SDS gel electrophoresis confirm the, large dimensions and the paramyosin nature of the thick filaments. Microdensitometry of the gel proteins confirms the high proportion of collagen present. No significant differences in muscle ultrastructure were found between limpets from different tidal heights. Muscle attachment areas are shown to be species-specific and positively correlated to tenacity and wave exposure. The muscle attachment mechanism is similar to that described for other molluscs. It consists of a special epithelial layer and a mucous-like material at the muscle-shell interface that possibly has an adhesive function. Although the ultrastructure of Patella is very similar to that of the anterior byssus retractor of Mytilus, its mechanical behaviour is not. The muscle has a narrow working range where maximum tensions and "catch-like" contractions develop. This narrow length range is co-incident with the in situ length at which clamping occurs. It is suggested that the large component of collagen has an important influence over the mechanical behaviour of the muscle during clamping, by cross-linking in a manner similar to that described for some echinoderm connective tissues.

Synthetic and spectrometric studies of benzodioxepinone derivatives

Gelebe, Aifheli Carlson January 1995 (has links)
An extensive range of oxygen and sulphur substituted benzodiazepine analogues has been synthesised via Baeyer-Villiger and Schmidt reactions of specially prepared flavanone and N-acetyl-4-quinolone precursors. Alternative, cyclisation routes have also been used to prepare some of these compounds. Ring-opening reactions of 1,5-benzodioxepinones have been investigated and a detailed kinetic-mechanistic study of the Baeyer-Villiger reaction of flavanones has been carried out using 1 H NMR spectroscopy to explain the observed regiochemistry of oxygen insertion. The electron-impact mass spectrometric fragmentation patterns of series of 4-aryl-l ,5-benzoxathiepinones, 3-aryl-4, I-benzoxathiepinones and 3-aryl-4,1-benzoxathiepines have been studied using a combination of low-resolution, highresolution and metastable-peak analyses. The 170 NMR spectroscopic properties of various oxygenated analogues have also been studied. The binding affinities of selected benzodiazepine analogues for rat brain benzodiazepine receptors have been evaluated using a radioreceptor assay technique; at certain concentrations, some of test compounds exhibited remarkable potentiation of diazepam binding, others the ability to displace diazepam from benzodiazepine receptors. A conformational analysis of the 7-membered ring systems has been undertaken, using lH NMR spectroscopic, computer modelling and x-ray crystallographic techniques, and certain conformational preferences have been identified.

Interferon induction by Diplococcus pneumoniae in mice

Carpenter, Dell Ronkowski, 1930- January 1971 (has links)
No description available.

Management guidance for research climate /

Thatcher, Richard K. January 1980 (has links)
No description available.

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