Intermolecular Forces
Mostrando 1-12 de 42 artigos, teses e dissertações.
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1. HÁ ALGO NOVO NO RECONHECIMENTO MOLECULAR APLICADO À QUÍMICA MEDICINAL?
In Medicinal Chemistry, the knowledge, the study and the understanding of the intermolecular interactions inherent to the molecular recognition of a ligand by its target bioreceptor are essential. This is because understanding these interactions, which define the molecular complementarity between the two, is the key to analyze critically structure-activity r
Quím. Nova. Publicado em: 2020-01
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2. COM AR - RESPIRAR E ENSINAR
A set of quasi-quantitative experiments are described to relate volume and pressure variations associated to the phase changes of the main components of the air. The processes are promoted by variation of temperature using liquid nitrogen to refrigerate the air and get liquid oxygen, traces of dry ice and ice. The changes in volume and pressure associated to
Quím. Nova. Publicado em: 2016-11
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3. INTERACTIONS: DESIGN, IMPLEMENTATION AND EVALUATION OF A COMPUTATIONAL TOOL FOR TEACHING INTERMOLECULAR FORCES IN HIGHER EDUCATION
Intermolecular forces are a useful concept that can explain the attraction between particulate matter as well as numerous phenomena in our lives such as viscosity, solubility, drug interactions, and dyeing of fibers. However, studies show that students have difficulty understanding this important concept, which has led us to develop a free educational softwa
Quím. Nova. Publicado em: 2015-12
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4. Modeling the pull-in instability of the CNT-based probe/actuator under the Coulomb force and the van der Waals attraction
Carbon nano-tube (CNT) is applied to fabricate nano-probes, nano-switches, nano-sensors and nano- actuators. In this paper, a continuum model is employed to obtain the nonlinear constitutive equation and pull-in instability of CNT-based probe/actuators, which includes the effect of electrostatic interaction and intermolecular van der Waals (vdW) forces. The
Lat. Am. j. solids struct.. Publicado em: 2014-12
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5. Development and characterization of hybrid materials based on biodegradable PLA matrix, microcrystalline cellulose and organophilic silica
The goal of this work was to investigate the production and properties of hybrid materials based on poly(lactic acid) (PLA), employing microcrystalline cellulose (MCC) and organophilic silica (R972) as fillers. The composites were obtained by solution casting to form films. Each nanoparticle was incorporated at 3 wt. %, relative to the polymer matrix. In thi
Polímeros. Publicado em: 30/09/2014
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6. Gap Dependent Bifurcation Behavior of a Nano-Beam Subjected to a Nonlinear Electrostatic Pressure
This paper presents a study on the gap dependent bifurcation behavior of an electro statically-actuated nano-beam. The sizedependent behavior of the beam was taken into account by applying the couple stress theory. Two small and large gap distance regimes have been considered in which the intermolecular vdW and Casimir forces are dominant, respectively. It h
Lat. Am. j. solids struct.. Publicado em: 2014
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7. Síntese, caracterização e estrutura cristalina de polímeros de coordenação envolvendo metais de transição (Mn+2, Co+2, Cu+2 e Zn+2), ligantes nitrogenados multidentados e policarboxilatos.
Este trabalho de tese de doutorado consistiu na síntese e caracterização de arranjos supramoleculares com os metais Mn2+, Co2+, Cu2+ e Zn2+ da primeira série de transição contendo ligantes nitrogenados 1,3-bis(4-piridil)propano (BPP), sulfeto de di(4-piridila) (DPS) e dissulfeto de di(4-piridila) (DPSS) e policarboxilatos 1,2,4,5- benzenotetracarboxila
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/03/2011
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8. Electrical properties of the red blood cell membrane and immunohematological investigation
Hemagglutination is widely used in transfusion medicine and depends on several factors including antigens, antibodies, electrical properties of red blood cells and the environment of the reaction. Intermolecular forces are involved in agglutination with cell clumping occurring when the aggregation force is greater than the force of repulsion. Repulsive force
Revista Brasileira de Hematologia e Hemoterapia. Publicado em: 2011
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9. O uso do recurso multimídia no ensino de Química para alunos de ensino médio sobre o conteúdo de ligações intermoleculares / The usage of the multimedia resource at chemistry teaching of intermolecular forces content to pupils of secondary school.
Este estudo é uma pesquisa qualitativa, que busca indícios sobre a possibilidade de a inserção do recurso multimídia favorecer (ou não) a elaboração de conceitos sobre ligações intermoleculares para alunos do ensino médio. Foi aplicado em um grupo de 22 alunos do segundo ano, do ensino médio, de uma escola particular da zona sul da cidade de São
Publicado em: 2011
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10. Arranjos Supramoleculares: Formação de Polímeros de Coordenação com Metais da Primeira Série de Transição e Ligantes Polidentados Derivados de Anéis Piridínicos
Este trabalho de tese de doutorado consistiu na síntese e caracterização de arranjos supramoleculares com os metais CoII, CuII e MnII da primeira série de transição contendo ligantes nitrogenados polidentados. A obtenção destes compostos incluiu reações entre diferentes precursores metálicos MX2.nH2O (M= CoII, CuII, MnII, X= NO3- e ClO4-) com os l
Publicado em: 2010
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11. Propagação de ondas de combustão em gases de Noble Abel e de van der Waals / Propagation of combustion waves in Noble-Abel and van der Waals gases
The classical Chapman-Jouguet (CJ) theory considers the propagation of combustion waves disregarding the effects of chemical kinetics and wave structure. The CJ model assumes one-dimensional steady flow, ideal gas and sonic conditions at the products. Since extremely high temperatures and pressures can be attained during the combustion wave propagation, real
Publicado em: 2009
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12. Propagation of combustion waves in Noble-Abel and van der Waals gases / Propagação de ondas de combustão em gases de Noble Abel e de van der Waals
The classical Chapman-Jouguet (CJ) theory considers the propagation of combustion waves disregarding the effects of chemical kinetics and wave structure. The CJ model assumes one-dimensional steady flow, ideal gas and sonic conditions at the products. Since extremely high temperatures and pressures can be attained during the combustion wave propagation, real
Publicado em: 2009