Integrated Spectroscopy
Mostrando 13-24 de 33 artigos, teses e dissertações.
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13. Estudo de mineralizações de tipo Cu-porfiro do sul do Peru por meio de sensoriamento remoto e aeromagnetometria
A large number of mineral deposits are known in the Andes, including Cu-porphyry deposits. Among these, Cuajone, Quellaveco and Toquepala are some of the most important in the southern portion of Peru. They are located in the domain ofthe Bolivian Orocline, within the Incapuquio shear zone, a structure that controls the mineralization, ofabout 60 Ma. Airborn
Publicado em: 2002
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14. Modelo exploratorio para depositos auriferos do tipo Morro do Ouro com base em dados e tecnicas de sensoriamento remoto
A method for the identification of metallotects related to Morro do Ouro-type gold deposits (DTMO) is proposed, based on remote sensing data and techniques. Samples from this type of deposit, collected at Paracatu (Minas Gerais State) and Luziânia (Goiás State), were studied through reflectance spectroscopy and petrography. The results showed that iron oxi
Publicado em: 2000
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15. A caracterização de laser de diodo para espectroscopia de alta resolução
In the last decade the diode lasers became the most important in economics. The use of diode lasers in Physics and Technology has expanded rapidly. This has occurred because their low cost, reliability , durability and possibility of integrating with electronic components to form integrated optoeletronic circuits. The development of novel techniques to contr
Publicado em: 1997
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16. Dispositivos optoeletronicos para o infravermelho termal
The IV-VI materiais semiconducting devices are important due to their several applications in the thermal infrared spectral region (5 mm £ l £ 14 mm). Radiation detectors as well as semiconductor lasers made out with those compounds have several uses, ranging from satellite s attitude control to high resolution spectroscopy. Among the important materiais o
Publicado em: 1994
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17. Individual variation in macronutrient regulation measured by proton magnetic resonance spectroscopy of human plasma
Proton nuclear magnetic resonance (1H-NMR) spectroscopy of plasma provides a global metabolic profiling method that shows promise for clinical diagnostics. However, cross-sectional studies are complicated by a lack of understanding of intraindividual variation, and this limits experimental design and interpretation of data. The present study determined the d
American Physiological Society.
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18. Ultrafast spectroscopy reveals subnanosecond peptide conformational dynamics and validates molecular dynamics simulation
Femtosecond time-resolved spectroscopy on model peptides with built-in light switches combined with computer simulation of light-triggered motions offers an attractive integrated approach toward the understanding of peptide conformational dynamics. It was applied to monitor the light-induced relaxation dynamics occurring on subnanosecond time scales in a pep
The National Academy of Sciences.
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19. Rapid characterization of green fluorescent protein fusion proteins on the molecular and cellular level by fluorescence correlation microscopy
Fluorescence correlation microscopy (FCM) was applied to characterize fusion proteins of the green fluorescent protein (GFP) on the cellular as well as molecular level within seconds in an integrated instrument. FCM combines the inherent sensitivity and high spatial resolution of fluorescence correlation spectroscopy with fluorescence imaging and micropositi
The National Academy of Sciences.
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20. Picosecond conformational transition and equilibration of a cyclic peptide
Ultrafast IR spectroscopy is used to monitor the nonequilibrium backbone dynamics of a cyclic peptide in the amide I vibrational range with picosecond time resolution. A conformational change is induced by means of a photoswitch integrated into the peptide backbone. Although the main conformational change of the backbone is completed after only 20 ps, th
National Academy of Sciences.
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21. In vivo stability of ester- and ether-linked phospholipid-containing liposomes as measured by perturbed angular correlation spectroscopy.
To evaluate liposome formulations for use as intracellular sustained-release drug depots, we have compared the uptake and degradation in rat liver and spleen of liposomes of various compositions, containing as their bulk phospholipid an ether-linked phospholipid or one of several ester-linked phospholipids, by perturbed angular correlation spectroscopy. Mult
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22. Matrix decompositions of two-dimensional nuclear magnetic resonance spectra.
Two-dimensional NMR spectra are rectangular arrays of real numbers, which are commonly regarded as digitized images to be analyzed visually. If one treats them instead as mathematical matrices, linear algebra techniques can also be used to extract valuable information from them. This matrix approach is greatly facilitated by means of a physically significant
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23. Monitoring conformational dynamics of a single molecule by selective fluorescence spectroscopy
A recently developed, real-time spectroscopic technique, burst-integrated fluorescence lifetime (BIFL), is shown to be well suited for monitoring the individual molecular conformational dynamics of a single molecule diffusing through the microscopic, open measurement volume (≈10 fl) of a confocal epi-illuminated set-up. In a highly diluted aqueous solution
The National Academy of Sciences.
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24. Local translational diffusion rates of membranous Na+,K(+)-ATPase measured by saturation transfer ESR spectroscopy.
Diffusion-controlled Heisenberg spin exchange between spin-labeled Na+,K(+)-ATPase [ATP phosphohydrolase (Na+/K(+)-transporting), EC 3.6.1.37] proteins has been studied by saturation transfer ESR spectroscopy in reconstituted membranes. Na+,K(+)-ATPase from the salt gland of Squalus acanthias was solubilized in a polyoxyethylene ether detergent, octa(ethylen