Polarizability Difference
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. INTERAÇÕES INTERMOLECULARES E O FENÔMENO DA SOLUBILIDADE: EXPLICAÇÕES DE GRADUANDOS EM QUÍMICA
The present study investigated the use of intermolecular interaction concepts by freshman chemistry students during general chemistry classes, explaining some of the solubility phenomenon. For this purpose, classes on the topic in question were monitored and two tests were asking for explanations for the difference in solubility of oxygen and carbon dioxide
Quím. Nova. Publicado em: 2020-01
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2. Estudos das propriedade óticas não lineares em meios dopados com absorvedores lentos
Neste trabalho, usando um laser de Ti3+:Safira sintonizado em 803nm como comprimento de onda de excitação, foram realizadas medidas de Z-scan resolvidas no tempo para caracterizar as propriedades óticas não lineares de matrizes vítreas à base de fosfato. Tal matriz denominada PAN (P2O5-Al2O3-Na2CO3) foi dopada com concentrações crescentes de Nd3+, va
Publicado em: 2011
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3. Mobilidade ionica acoplada a espectrometria de massas : interferencia de parametros do drift gas na resolução de anilinas substituidas e determinação da mobilidade intrinsica de agregados de liquidos ionicos / Ion mobility mass spectrometry : interference of drift gas parameters on the resolution of substituted anilines and determination of intrinsic mobility of ionic liquids aggregates
Ion mobility spectrometry separates ions with different sizes or spacial conformations in gas phase according to the time they take to travel through a gas under the influence of an electrical field. Coupling this technique to mass spectrometry provides an extremely versatile tool, able to investigate molecular structure and separate complex samples, includi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
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4. Pure solvents and their mixtures solvation: relevance to chemistry and creen chemistry / Solvatação por solventes puros e suas misturas: relevância para química e química verde
In the present work, solvatochromic probes were employed in the study of pure solvents, binary mixtures of water with protic and aprotic solvents, ionic liquids and their aqueous binary mixtures The probes studied are classified in two series: (i) RPMBr2; where R = methyl to 1-octyl allowed increasing the hydrophobicity while maintaining the pKa constant. (i
Publicado em: 2008
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5. Cooperative Effects in Models of Steady-State Transport across Membranes, III. Simulation of Potassium Ion Transport in Nerve*
An extremely simple membrane transport model simulates qualitatively the observed flux-potential curves for steady-state potassium ion transport across a nerve (squid) membrane in the special case of high external potassium ion concentration. The transporting units (protein molecules) in the model are assumed to exist in two different conformations, which in
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6. An investigation of the interrelationships between linear and nonlinear polarizabilities and bond-length alternation in conjugated organic molecules.
A computational method was devised to explore the relationship of charge separation, geometry, molecular dipole moment (mu), polarizability (alpha), and hyperpolariz-abilities (beta, gamma) in conjugated organic molecules. We show that bond-length alternation (the average difference in length between single and double bonds in the molecule) is a key structur
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7. Electrostatics and electrodynamics of bacteriorhodopsin.
The stationary electric dichroism of bacteriorhodopsin is in qualitative, but not quantitative, agreement with the orientation function for disks having a permanent dipole directed perpendicular to the plane and an induced dipole in the plane. Fits of the orientation function to data measured at low field strengths demonstrate: an increase of the permanent d