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Mostrando 13-24 de 55 artigos, teses e dissertações.
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13. Raman spectroscopy of the high explosives / Espectroscopia Raman de altos explosivos
Selected high explosives were characterized by Raman and Infrared spectroscopies and the effect of temperature was followed in-situ by Raman spectroscopy. TNT, HMX, RDX, PETN (commercial products) and TATP belong to distinct chemical families (except HMX and RDX) and their response to heating was evaluated. The samples were first characterized by FT-IR, FT-I
Publicado em: 2006
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14. "Influência dos materiais restauradores protéticos na transmissão da carga oclusal : método da interferometria holográfica" / Influence of prosthetic restorative materials at occlusal load transmission. Holographic Interferometry Method
Although researches assert that restoring dental material, due to their different mechanical properties, influences at load transmission to support tissues, it was not find any conclusive scientific evidence. Researches with finite element, implants and different prosthetic reconstruction material do not have an agreement in terms of results. So, considering
Publicado em: 2005
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15. A methodology for provisioning and differentiation of optical QoS in FWN impaired transparent optical networks / Uma abordagem para aprovisionamento e diferenciação de QoS optico na presença de FWM em redes opticas transparentes
This Thesis proposes methodologies for differentiated optical QoS in a multi-client scenario, in which client networks (e.g. IP/MPLS and SDH) dynamically request lightpaths from a transparent optical network in which Four-Wave Mixing (FWM) imposes crosstalk among lightpaths. In order to meet Optical Service Level Agreement (OSLA), it is proposed an integrate
Publicado em: 2005
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16. Estudos visando a elucidação estrutural do alcaloide parviestemoamida : sintese (+/-)-10-epi- parviestemoamida
(-)-Parvistemoamide, a member of the Stemona alkaloids was reported by Xu and coworkers in 1991 as a minor alkaloid fram the roots of Stemona parviflora. Extracts of the Stemonaceae species have been used in Chinese and Japanese folk medicine as insecticides, antihelmintics for domestic animaIs and drugs for the treatment of human respiratory diseases such a
Publicado em: 2005
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17. A natureza de AGR e suas implicações na ordem VS: um estudo comparativo entre o português brasileiro e o português europeu
In this thesis I do a comparative study between the Brazilian Portuguese Grammar (henceforth BP) and European Portuguese Grammar (henceforth EP) concerning to the word order, more specifically, with respect to the subject order in relation to the verb in finite declarative phrases. One defends that Verb-Subject order (VS) has been lost in the first language
Publicado em: 2004
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18. Estudos de ressonancia magnetica nuclear de 3-endo e 3-exo-halobiciclo [2.2.1]heptan-2-onas
The present work reports the results obtained in this research, whose main objectives were the synthesis, separation, purification and complete assignment of H and C NMR signals of 3-endo- and 3-exo-halobicycle[2. 2.1]heptan-2-ones, or 3-halonorcamphors as well as evaluation of aplicability of semi-empirical CHARGE6 and CHARGE7E methods, for the H NMR chemic
Publicado em: 2001
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19. A posição dos adjetivos no interior do sintagma nominal : perspectivas sincronica e diacronica
This thesis investigates the position of adjectives inside noun phrases in Portugues. Its aim ís to determine the restrictions responsible for the contrast between (1) and (2) below: (1) a. um livro interessante (lit.: a book interesting) b. um interessante livro (lit.: an interesting book) (2) a. um livro vermelho (lit.: a book red) b. " um vermelho livro
Publicado em: 1991
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20. Raman and infrared spectrometry of gadolinium aluminates pure and doped / Espectroscopia no infravermelho e Raman do aluminato de gadolineo puro e dopado com íons de terras raras
IR and Raman measurements were carried out in pure and Eu+3 - doped GdAlO3 with the purpose of understanding their K=O phonom modes and the Eu+3 electronic transitions. Starting from the GdAlO3 symmetry, (D162h) the correlation method allows the classification of the number and symmetries of the modes, as well their assignment as either internal or external.
Publicado em: 1983
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21. STRIDE: a web server for secondary structure assignment from known atomic coordinates of proteins
STRIDE is a software tool for secondary structure assignment from atomic resolution protein structures. It implements a knowledge-based algorithm that makes combined use of hydrogen bond energy and statistically derived backbone torsional angle information and is optimized to return resulting assignments in maximal agreement with crystallographers' designati
Oxford University Press.
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22. Bacteriochlorophyll electronic transition moment directions in bacteriochlorophyll a-protein
The low-temperature 800-nm band absorption and circular dichroism spectra of the bacteriochlorophyll (Bchl) a-protein from Prosthecochloris aestuarii strain 2K are analyzed theoretically. These spectra show considerable structure that is attributed primarily to resonance (exciton) interactions among the lowest singlet transitions of the Bchl a molecules cont
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23. Assignment of Neisseria meningitidis Serogroups A, C, W135, and Y Anticapsular Total Immunoglobulin G (IgG), IgG1, and IgG2 Concentrations to Reference Sera
Meningococcal serogroup-specific immunoglobulin G (IgG), IgG1, and IgG2 concentrations were assigned to three reference sera, CDC 1992, 89-SF, and 96/562, for meningococcal serogroups A, C, Y, and W135 via the method of cross standardization. The sum of the serogroup-specific IgG1 and IgG2 concentrations determined for the four meningococcal serogroups showe
American Society for Microbiology.
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24. Characterization of Listeria monocytogenes isolates by esterase electrophoresis.
Multiple bands of alpha-naphthyl-propionyl esterase (alpha NPE) activity observed following starch gel electrophoresis of cell extracts allowed 219 Listeria monocytogenes isolates from milk, nondairy foods, and clinical and veterinary sources to be assigned to 17 different alpha NPE types. Multilocus enzyme electrophoresis (MEE) analysis was used to obtain e