Electronic Component
Mostrando 13-24 de 95 artigos, teses e dissertações.
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13. CARCINOGENICIDADE DE HIDROCARBONETOS POLICÍCLICOS AROMÁTICOS
The assessment of the carcinogenic potential of polycyclic aromatic hydrocarbons (PAH) is obtained by a principal component analysis (PCA) and quantitative structure-activity relationship (QSAR) using hydrophobic (LogP), stereo and electronic parameters (electron affinity, dipole moment and HOMO-LUMO gap) calculated from the AM1 method. The PAH-DNA interacti
Quím. Nova. Publicado em: 2016-08
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14. COMPARAÇÃO ENTRE FUNCIONAIS DE DENSIDADE NO ESTUDO DE PROPRIEDADES ELETRÔNICAS DE DERIVADOS DA ARTEMISININA
The present paper demonstrates the application of functional GGA hybrids, with long-range corrections, for the calculation of the electronic properties of artemisinin and two of its derivatives - artemether e artesunate. Due to the relatively large amount of data obtained, the statistical method of Principal Component Analysis was employed. The functionals o
Quím. Nova. Publicado em: 2016-04
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15. ALK-5 Inhibition: A Molecular Interpretation of the Main Physicochemical Properties Related to Bioactive Ligands
Activin-like kinase 5 (ALK-5) receptor represents an attractive object to treat cancer. Analyses on the quantitative structure-activity relationship were performed to explore the relationship between the molecular structure of 1,5-naphthyridine, pyrazole and quinazoline derivatives and the inhibition of the activin-like kinase 5. From a data set containing 5
J. Braz. Chem. Soc.. Publicado em: 2015-09
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16. The Correlation Between Electronic Structure and Antimalarial Activity of Tetrahydropyridines
In this study, correlations between electronic structure and the antimalarial activities reported for a group of 21 tetrahydropyridines were evaluated by multivariate methods. Simple and multiple linear regressions, principal component analyses, and linear discriminant analyses were employed to evaluate possible correlations between quantum-mechanical descri
J. Braz. Chem. Soc.. Publicado em: 2015-02
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17. Electronic tongue system to evaluate flavor of soybean (Glycine Max (L.) Merrill) genotypes
An electronic tongue system was tested as a fast and efficient analytical tool for flavor evaluation of soybean genotypes. Grain samples of 25 soybean lines were analyzed using 0.25 g of milled samples added to 100 mL of distilled water and mixing for one minute on a magnetic stirrer. An aliquot (50 mL) from the filtered liquid was used for the analysis on a
Braz. arch. biol. technol.. Publicado em: 2014-10
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18. Carcinogenicidade do carbendazim e seus metabólitos
The carcinogenic potential of carbendazim and its metabolites was analyzed using statistical treatment of electronic parameters obtained from DFT/ 6-311++G(d,p) and AM1 calculations. The carcinogen-DNA interaction is described in the framework of the theory of unsynchronized resonance of covalent bond as a process of electron transfer involving the HOMO and
Quím. Nova. Publicado em: 2014
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19. Electromagnetic interference reduction by dynamic impedance balancing applied to biosensors
INTRODUCTION: Electromagnetic interference caused by electric power lines adversely affects the signals of electronic instruments, especially those with low amplitude levels. This type of interference is known as common-mode interference. There are many methods and architectures used to minimize the influence of this kind of interference on electronic instru
Rev. Bras. Eng. Bioméd.. Publicado em: 2013-09
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20. Estudo dos resíduos eletroeletrônicos de uma prestadora de services do setor naval, com vistas ao gerenciamento ambiental. / Study of a naval segment Company e-waste, to environmental management.
Esta pesquisa usou o estudo de caso para analisar os resíduos eletroeletrônicos gerados em uma Empresa prestadora de serviços atuante no setor naval. Após breve reflexão sobre a relação homem-natureza, apresenta-se o conceito de resíduos sólidos e suas classificações, introduzindo-se dados que embasam o impacto dos eletroeletrônicos na geração
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/03/2012
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21. Análise conformacional e das interações eletrônicas de algumas N-metóxi-N-metil-acetamidas-α-heterossubstituídas / Conformational analysis and electronic interactions of some N-methoxy-N-methyamides α-heterossubstituted
This thesis deals with the synthesis and conformational analysis of some α-heterosubstituted N-methoxy-N-methyl-amides (Weinreb amides) Z-C(O)-N(OMe)Me (Z= CH2F (1), CH2OMe (2), CH2OPh (3), CH2Cl (4), CH2Br (5), CH2SEt (6) and Me2CSEt (7). The analysis of the carbonyl band in the IR spectra supported by B3LYP/6 311++G(3df, 3pd calculations along with th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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22. Scent analysis of Rosa laevigata through metal oxide sensor array electronic nose
The scent fingerprint of Rosa laevigata Michx., Rosaceae, samples harvested at different periods was investigated. Principal component analysis (PCA) and discriminant factor analysis (DFA) were done on the scent response values measured by an electronic nose (EN) sensor. Statistical quality control (SQC) analysis was also conducted. The R. laevigata samples
Revista Brasileira de Farmacognosia. Publicado em: 29/07/2011
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23. Hyptis fruticosa Salzm. ex Benth. (Lamiaceae): caracterização botânica, química, avaliações ecofisiológicas e atividades farmacológicas. / Hyptis fruticosa Salzm. ex Benth. (Lamiaceae): characterization botany, chemistry, ecophysiological assessments and pharmacological activities.
Hyptis fruticosa Salzm. ex Benth. (Alecrim do campo) is an aromatic plant widely used in folk medicine due to its therapeutic properties. Therefore the aim of this work was to undertake botanical, chemical, ecophysiological, and pharmacological studies. The botanical investigations observed and analyzed information about morphological, physiological, and env
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2010
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24. Análise térmica de um componente eletrônico em um equipamento de telecomunicação / Thermal analysis of electronic component from telecomuni-cation equipment
Determinar o coeficiente de transferência de calor por convecção local sobre um com-ponente eletrônico dentro de um equipamento de telecomunicação em operação não é uma tarefa trivial, pois muitas variáveis do sistema térmico são desconhecidas e difíceis de serem mensuradas. A análise térmica no presente trabalho tem como objetivo estimar as
Publicado em: 2010