• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 256
  • 81
  • 70
  • 33
  • 16
  • 14
  • 12
  • 6
  • 5
  • 5
  • 4
  • 4
  • 4
  • 4
  • 4
  • Tagged with
  • 610
  • 610
  • 415
  • 100
  • 77
  • 71
  • 67
  • 60
  • 57
  • 52
  • 51
  • 49
  • 49
  • 48
  • 45
  • 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.
1

Synthesis and properties of some novel phthalocyanine functional dyes

Burnham, Paul Michael January 2002 (has links)
No description available.
2

Chemometric methods for the analysis of pharmaceutical data

Hardy, Allison Jane January 1995 (has links)
No description available.
3

Design of novel dyes towards the near-infrared

Loudet, Aurore 15 May 2009 (has links)
A series of seven functionalized near-infrared aza-BODIPY dyes have been synthesized and their spectroscopic properties measured. Their fluorescence emissions could be tuned by altering the electronic substituents on the aryl-groups. A through-bond energy transfer cassette featuring two fluorescein units as donor, and an aza-BODIPY dye as acceptor, was then synthesized and its preliminary spectroscopic properties examined. This cassette exhibited absorption and fluorescence characteristics that were highly dependent on the pH and the solvent polarity. Furthermore, no energy transfer was observed upon excitation of the donor. Novel near-infrared aza-BODIPY were also synthesized via a one-pot, two step reaction. Upon demethylation and intermolecular cyclization onto the B-atom, a ~ 100 nm red¬shift of both the absorption and fluorescence emission maxima could be observed. Through-bond energy transfer cassettes based on squaraines have also been synthesized and their spectroscopic properties studied. These cassettes exhibited fast and efficient energy transfer from the donor to the acceptor. In depth experiments have also been realized to correlate the rate of energy transfer and structure on 3 different sets of through-bond energy transfer cassettes. No correlations could be made between the rate of the energy transfer and the nature of the acceptor, and the distance between the donor and acceptor. Finally, the use of DPP (diketo-pyrrolopyrolle) pigment as a potential donor for through-bond energy transfer cassettes was investigated. Three water-soluble DPPs dyes were prepared and studied. They all displayed weak fluorescence in water.
4

Applying near-infrared spectroscopy (nirs)

Wruck, Eric Michael 29 August 2005 (has links)
Over recent decades, much has been learned about the perceptual capacity that enables infants to recognize and understand language. However, not until very recently have the neural mechanisms that are the substance of language learning been investigated. A recently developed optical imaging technique called near-infrared spectroscopy (NIRS) shows promise for being an acceptable alternative to invasive imaging techniques. NIRS measures correlates of neural activity by assessing hemoglobin concentration changes in the infant brain. The research presented here investigates neural activation in the left temporal and occipital cortex regions during exposure to speech and visual stimuli. As hypothesized, hemodynamic reaction was observed in both areas. Results indicate a significant activation in response to speech in the left temporal region, and an intriguing difference between uni- and bi-modally presented speech stimuli. These results have interesting implications for future multimodal studies of infant speech perception.
5

Analysis of synthetic polymers by near-infrared spectroscopy /

Miller, Charles Edward, January 1989 (has links)
Thesis (Ph. D.)--University of Washington, 1989. / Vita. Includes bibliographical references (leaves [275]-286).
6

Moisture depth profiling in paper using near-infrared spectroscopy /

Paaso, Janne. January 1900 (has links) (PDF)
Thesis (doctoral)--University of Oulu, 2007. / Includes bibliographical references (p. 182-193). Also available on the World Wide Web.
7

Monitoring the esterification reactions of carboxylic acids with alcohols using near-infrared spectrocopy and multivariate calibration methods/

Öztürk, Betül. Özerdem, Durmuş January 2003 (has links) (PDF)
Thesis (Master)--İzmir Institute of Technology,İzmir, 2003 / Includes bibliographical references (leaves. 81-84).
8

Application of near infrared spectroscopy in meat quality assessment /

Ding, Haibiao. January 1999 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1999. / Includes bibliographical references.
9

Applications of a photodiode array spectrophotometer for the short wavelength near-infrared region (700-1100 nm) /

Mayes, David M. January 1990 (has links)
Thesis (Ph. D.)--University of Washington, 1990. / Vita. Includes bibliographical references (leaves [139]-145).
10

Improving the robustness of multivariate calibration models for the determination of glucose by near-infrared spectroscopy

Kramer, Kirsten Elizabeth. January 2005 (has links)
Thesis (Ph. D.)--University of Iowa, 2005. / Includes bibliographical references (leaves 272-282).

Page generated in 0.0446 seconds