6 documents found, page 1 of 1

Theory of Raman enhancement by two-dimensional materials: Applications for grap...

BARROS, Eduardo Bedê; DRESSELHAUS, Mildred S. Theory of Raman enhancement by two-dimensional materials: Applications for graphene-enhanced Raman spectroscopy. Physical Review B, Washington, v. 90, n. 3, p. 1-12, 2014.; We propose a third-order time-dependent perturbation theory approach to describe the chemical surfaceenhanced Raman spectroscopy of molecules interacting with two-dimensional (2D) surfaces such a...

Glutamine and Alanyl-Glutamine increase RhoA expression and reduce clostridium ...

Clostridium difficile is a major cause of antibiotic-associated colitis and is associated with signicant morbidity and mortality. Glutamine (Gln) is a major fuel for the intestinal cell population. Alanyl-glutamine (Ala-Gln) is a dipeptide that is highly soluble and well tolerated. IEC-6 cells were used in the in vitro experiments. Cell morphology was evaluated by atomic force microscopy (AFM) and scanning elec...

Fermi-energy-dependent structural deformation of chiral single-wall carbon nano...

Propriedades das espumas grafíticas e dos nanotubos de carbono Fo

In this work we applied experimental techniques, such as Raman spcetroscopy and electron microscopy, and group theoretical analysis to study the structural, electronic and vibrational properties of graphitic materials. A Raman spectroscopy study of graphitic foams was performed for probing the spatial and laser excitation energy dependence of the double resonance Raman peaks. We have observed changes in the D b...

Effect of subinihibitory and inhibitory concentrations of Plectranthus amboinic...

We evaluated the antimicrobial activity and some mechanisms used by subinhibitory and inhibitory concentrations of the essential oil, obtained from leaves of Plectranthus amboinicus , against a standard strain of Klebsiella pneumoniae and 5 multiresistant clinical isolates of the bacteria. The minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC), the rate of kill and the pH sensit...

Selection rules for one- and two-photon absorption by excitons in carbon nanotubes

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