Molecular Vibrations
Mostrando 1-12 de 28 artigos, teses e dissertações.
-
1. RAMAN STUDIES OF BIS(PHENYLTERPYRAZINE)IRON(II) AND SUPRAMOLECULAR SPECIES WITH PENTACYANIDOFERRATE(II) IONS
The chemistry and spectroscopy of the iron(II) phenylterpyrazine complex, [Fe(phtpz)2]2+, were investigated in comparison with the analogous phenylterpyridine species, Fe(phtpy)2]2+, and the results indicated a strong electronic delocalization on the Fe(II) terimine chromophore encompassing the lateral pyrazyl groups. The delocalized nature of the molecular
Quím. Nova. Publicado em: 05/12/2019
-
2. Nanostructured polymeric system based of cashew gum for oral admnistration of insulin
ABSTRACT The subcutaneous administration of insulin has been the treatment of millions of diabetics in the world. However, for such via insulin is invasive and not mimics the physiological action causing side effects. The oral route would be the most physiological and comfortable option, but the oral bioavailability of insulin is low by proteolytic activity
Matéria (Rio J.). Publicado em: 16/09/2019
-
3. MODIFICAÇÃO QUÍMICA DA PECTINA DO MELÃO CAIPIRA (Cucumis melo VAR. ACIDULUS)
Melon is one of the most widely consumed fruits in the world. In Brazil, 60% of the production is for domestic consumption, with these fruits deemed to be of lower commercial value. For the first time, pectin has been extracted from this species of melon. So the extraction of this polysaccharide can be used as an alternative to increase the value of the frui
Quím. Nova. Publicado em: 2017-06
-
4. Espectroscopia Raman na L-valina deuterada a baixas temperaturas. / Raman Spectroscophy in deuterated L-valine at low temperatures
A deuteraÃÃo de uma determinada amostra permite fazer a identificaÃÃo de vÃrios tipos de vibraÃÃes, comparando-se o espectro vibracional com o de uma amostra hidrogenada. Neste trabalho estudou-se o comportamento vibracional da L-valina-d8 (99,8 Ãtomo % D) atravÃs da tÃcnica de espectroscopia Raman. Inicialmente revisitou-se o assinalamento de todo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
-
5. Polarized Raman spectra of L-arginine hydrochloride monohydrated single crystal
Polarized Raman spectra of L-arginine hydrochloride monohydrated single crystal in nine different scattering geometries of the two irreducible representations of factor group C2 were studied at room temperature. The experimental wavenumber values are compared with those obtained from ab-initio calculation and the assignment of the Raman bands to the respecti
Brazilian Journal of Physics. Publicado em: 2010-09
-
6. Synthesis and characterization of a novel mesoporous Mn - organophosphate molecular sieve
A novel mesoporous Mn - organophosphate was synthesized for the first time. It is characterized by several physicochemical techniques. Small angle X-ray diffraction analysis shows the first peak in 2.5ºwith 39 Aº pore width. Elemental analysis shows that the composition is [(C12H23N)3PO]40Mn. Scanning electron microscopic picture shows the flag morphology
Materials Research. Publicado em: 2009
-
7. Propriedades espectrais das plantas no infravermelho termal (2,5 - 14 um): da química ao dossel. / Spectral properties of plants in the thermal infrared (2.5 - 14 um): from the chemistry to the canopy.
This work explores the thermal infrared spectral properties of plants to evaluate how such data might be used in laboratory, field, and remote sensing studies of ecosystems, and to analyze diverse chemical aspects of plant species. Attenuated total reflectance (ATR) spectra of plant leaves display absorption bands caused by the fundamental molecular vibratio
Publicado em: 2005
-
8. Perturbation theory approach to rotational tunneling systems
Diagrammatic perturbation theory is used to consider the problem of the coupling of a molecular group libration to the lattice vibrations in solids exhibiting rotational tunneling detected by inelastic neutron scattering. The technique is applied to a molecular group of symmetry C3 in presence of the hindering potential of the solid. The spectral density for
Brazilian Journal of Physics. Publicado em: 2000-03
-
9. Drenagem de espumas usadas em incendios classe B : influencia da presença de polimeros redutores de atrito hidrodinamico
Poly(ethylene oxide), PEO, is one of the most efficient drag reducing polymers. Its application in foam jels for fire-fighting can improve and even assure the fighting efficiency. In order to evaluate the viability of the application of PEO in foams of high stability used in class B fires (inflammable liquids), the effect of the polymer on the stability of f
Publicado em: 1997
-
10. Estudo vibracional do acetato de litio dihidratado
A solid state vibrational study of eight isotopic compounds of lithium acetate dihydrate (CH3COOLi.2H2O, CH3COOLi.2H2O, CD3COOLi.2H2O, CD3COOLi.2H2O, CH3COOLi.2D2O, CH3COOLi.2D2O, CD3COOLi.2D2O, CD3COOLi.2D2O) was carried out. The compounds were prepared and their Raman and infrared spectra were recorded for polycrystalline samples. The isotopic effects on t
Publicado em: 1987
-
11. Coherent femtosecond multidimensional probes of molecular vibrations
National Academy of Sciences.
-
12. MoViES: molecular vibrations evaluation server for analysis of fluctuational dynamics of proteins and nucleic acids
Analysis of vibrational motions and thermal fluctuational dynamics is a widely used approach for studying structural, dynamic and functional properties of proteins and nucleic acids. Development of a freely accessible web server for computation of vibrational and thermal fluctuational dynamics of biomolecules is thus useful for facilitating the relevant stud
Oxford University Press.