Chemical Functions
Mostrando 13-24 de 375 artigos, teses e dissertações.
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13. SÍNTESES E PROPRIEDADES DE FÁRMACOS INIBIDORES DA TIROSINA QUINASE BCR-ABL, UTILIZADOS NO TRATAMENTO DA LEUCEMIA MIELOIDE CRÔNICA
The chronic myeloid leukemia (CML) is characterized by presence of the Philadelphia chromosome (Ph), originated from the translocation between chromosomes 9 and 22. This chromosome generates an abnormal protein tyrosine kinase which is responsible for tumor cell proliferation. The emergence of tyrosine kinase inhibitors (TKIs) has transformed the treatment o
Quím. Nova. Publicado em: 2017-08
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14. Turbo-extraction of glycosides from Stevia rebaudiana using a fractional factorial design
ABSTRACT Stevia rebaudiana (Bertoni) Bertoni, Asteraceae, leaf extract has recently called the attention of food industry as a proposal for natural sweetener. The sweet flavor is attributed to the glycosides, in especial stevioside and rebaudioside A, which are the plant main chemical markers. The aim of the work reported here was to optimize the turbo-extra
Rev. bras. farmacogn.. Publicado em: 2017-08
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15. Organic Matter Stocks and the Interactions of Humic Substances with Metals in Araucaria Moist Forest Soil with Humic and Histic Horizons
ABSTRACT Soils with humic and histic horizons in tropical and subtropical ecosystems play an important role in determining the atmospheric C stock and its stabilization, climate regulation, water holding capacity, and environmental filtering, due to the different functions of soil organic matter (SOM). However, the processes and mechanisms that regulate SOM
Rev. Bras. Ciênc. Solo. Publicado em: 20/07/2017
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16. Structural and Photoacoustic Study of Cr11Ge19 Prepared by Mechanical Alloying
A nanostructured Cr11Ge19 phase was produced by mechanical alloying for 15 h. Decomposition occurred for larger milling times, yielding Cr, Ge, Cr2O3 and GeO2. According to the Cr-Ge phase diagram, the Cr11Ge19 phase is stable up to ≈ 928 oC, but, when submitted to milling, a structural instability causes its decomposition. We studied this structural insta
Mat. Res.. Publicado em: 22/06/2017
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17. Dung Beetles Associated with Agroecosystems of Southern Brazil: Relationship with Soil Properties
ABSTRACT Knowing the biodiversity of dung beetles in agricultural and livestock environments is the basis for understanding the contribution that these organisms make in nutrient cycling and ecosystem functions. The aim of the present study was to investigate the structure of copronecrophagous dung beetle communities inhabiting the main agroecosystems in sou
Rev. Bras. Ciênc. Solo. Publicado em: 27/03/2017
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18. Soil Quality Evaluation Using the Soil Management Assessment Framework (SMAF) in Brazilian Oxisols with Contrasting Texture
ABSTRACT The Soil Management Assessment Framework (SMAF) was developed in the U.S.A. and has been used as a tool for assessing and quantifying changes in soil quality/health (SQ) induced by land uses and agricultural practices in that region and elsewhere throughout the world. An initial study using SMAF in Brazil was recently published, but additional resea
Rev. Bras. Ciênc. Solo. Publicado em: 13/02/2017
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19. Certain Aspects of Univalent Function with Negative Coefficients Defined by Bessel Function
ABSTRACT Key words: In recent years, applications of Bessel functions have been effectively used in the modelling of chemical engineering processes and theory of univalent functions.In this paper, we study a new class of analytic and univalent functions with negative coefficients in the open unit disk defined by Modified Hadamard product with Bessel function
Braz. arch. biol. technol.. Publicado em: 23/01/2017
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20. Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest
ABSTRACT Aggregate stability is one of the most important factors in soil conservation and maintenance of soil environmental functions. The objective of this study was to investigate the aggregate stability mechanisms related to chemical composition of organic matter in soil profiles with humic and histic horizons in a toposequence under Araucaria moist fore
Rev. Bras. Ciênc. Solo. Publicado em: 2017
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21. Reclamation of a Degraded Coal-Mining Area with Perennial Cover Crops
ABSTRACT: Studies addressing the potential of grass roots in improving the structural quality of constructed minesoils are not frequent in the literature, although they are essential for understanding the re-establishment of soil functions in the environment. The objective of this study was to quantify the root attributes of the species Urochloa humidicola,
Rev. Bras. Ciênc. Solo. Publicado em: 19/12/2016
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22. Spatial prediction of soil penetration resistance using functional geostatistics
ABSTRACT Knowledge of agricultural soils is a relevant factor for the sustainable development of farming activities. Studies on agricultural soils usually begin with the analysis of data obtained from sampling a finite number of sites in a particular region of interest. The variables measured at each site can be scalar (chemical properties) or functional (in
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-10
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23. DESARROLLO DE LOS ÍNDICES DE PODER ELECTROFÍLICO Y NUCLEOFÍLICO DENTRO DEL MARCO CONCEPTUAL DE LA TEORÍA DEL FUNCIONAL DE LA DENSIDAD
In this work, the electrophilic and nucleophilic power indices were developed in the basis of canonical and grand canonical ensembles respectively, also local versions of these indices has been derived in analogy to philicity concept by Chattaraj. It can be observed that local electrophilic power and local nucleophilic power contain a third order response fu
Quím. Nova. Publicado em: 2016-08
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24. Entendendo o processo químico de bioativação da sinvastatina por métodos experimentais e computacionais: uma aula prática
Cholesterol is a lipid which in high concentration can be an important risk factor for coronary diseases and atherosclerotic lesions. This lipid presents an endogenous biosynthesis that involves several steps; one of them is modulated by the enzyme 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMG-CoA reductase). HMG-CoA reductase is inhibited by statins,
Quím. Nova. Publicado em: 2016-05