Chemical Correction
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. BEHAVIOR OF THERMALLY MODIFIED WOOD TO BIODETERIORATION BY XYLOPHAGE FUNGI
ABSTRACT Thermally modified wood undergoes chemical, physical, and mechanical modifications, resulting in changes in resistance to wood biodegrading agents. The objective of this study was to evaluate the resistance to biodeterioration of thermally modified wood by the industrial process VAP HolzSysteme® of Eucalyptus grandis, Pinus taeda and Tectona grandi
CERNE. Publicado em: 2020-09
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2. 3-Aminofurostane Alkaloids from Solanum paniculatum (“Jurubeba Verdadeira”) Roots
The roots of Solanum paniculatum (Solanaceae) have extensively been used in folk medicine to treat liver infections and as a diuretic. Ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS/MS) were used for the profiling and structural characterization of alkaloids from the roots of S. paniculatum. Six
J. Braz. Chem. Soc.. Publicado em: 2020-05
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3. Menière's Disease and Disorders of the Carbohydrate Metabolism Involving the Inner Ear
Abstract Introduction Menière’s disease was described in 1861, but there are still uncertainties regarding its pathophysiology and treatment. Endolymphatic hydrops is recognized as a fundamental pathological characteristic of the disease, as a result of an inadequate absorption of the endolymph. A milder type of endolymphatic hydrops results from an alt
Int. Arch. Otorhinolaryngol.. Publicado em: 18/07/2019
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4. Infrared or ultrasonic milk analysis can affect its results?
RESUMO: O monitoramento constante da qualidade do leite por parte das indústrias beneficiadoras demanda o uso de metodologias que agregam agilidade e baixo custo por análise, como a utilização de equipamentos eletrônicos que podem ter como princípio a espectroscopia por infravermelho ou por ultrassom. No presente estudo, avaliou-se a qualidade do leit
Cienc. Rural. Publicado em: 04/07/2019
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5. Digital Soil Mapping of Soil Properties in the “Mar de Morros” Environment Using Spectral Data
ABSTRACT Quantification of soil properties is essential for better understanding of the environment and better soil management. The conventional techniques of laboratory analysis are sometimes costly and detrimental to the environment. Thus, development of new techniques for soil analysis that do not generate residues, such as spectroscopy, is increasingly n
Rev. Bras. Ciênc. Solo. Publicado em: 07/01/2019
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6. Irrigation and Light Access Effects on Coffea arabica L. Leaves by FTIR-Chemometric Analysis
Coffee bean chemical compositions has been extensively studied. However, there is a small amount of research on other parts of the coffee plant, including leaves. Fourier transform infrared (FTIR) spectral profiles of Coffea arabica L. cv. IAPAR 59 leaf extracts from a simplex-centroid design were studied by principal component analysis (PCA) to evaluate the
J. Braz. Chem. Soc.. Publicado em: 2018-01
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7. Modern High-Yielding Maize, Wheat and Soybean Cultivars in Response to Gypsum and Lime Application on No-Till Oxisol
ABSTRACT Modern maize, wheat, and soybean cultivars are usually characterized by a short cycle, high shoot-root ratio, and high responsiveness to nutrient input. Continuous no-tillage management (NTS) frequently leads to a steep gradient in soil chemical quality with depth, thus decreasing yield under conditions of acid subsoil and water stress. This study a
Rev. Bras. Ciênc. Solo. Publicado em: 09/11/2017
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8. AVALIAÇÃO DO USO DE PLANILHAS COMPUTACIONAIS COMO UMA FERRAMENTA DIDÁTICA EM QUÍMICA ANALÍTICA QUALITATIVA
The use of spreadsheet softwares is not widespread in Chemical Education in Brazil as a computational education tool. By its turn the Qualitative Analytical Chemistry is considered a discipline with classical and non-flexible content. Thus in this work the spreadsheet software Excel® was evaluated as a teaching tool in a Qualitative Analytical Chemistry cou
Quím. Nova. Publicado em: 2016-04
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9. Instrumental and Experimental Conditions for the Application of Fourier Transform Infrared Analysis on Soil and Humic Acid Samples, Combined with Chemometrics Tools and Scanning Electron Microscopy
The investigation of the chemical properties of soil organic matter (OM), by the use of some spectroscopic techniques, requires the removal of the mineral impurities of the samples. Therefore, the objective of this study was to evaluate the influence of the pretreatment of samples and, also, the influence of instrumental conditions on the qualitative and qua
J. Braz. Chem. Soc.. Publicado em: 2015-09
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10. Effects of surface application of dolomitic limestone and calcium-magnesium silicate on soybean and maize in rotation with green manure in a tropical region
Although lime is currently the material most frequently used to ameliorate soil acidity in Brazil, silicate could efficiently replace this source because of its greater solubility and its greater silicon content, which are beneficial for plant development. This study aimed to evaluate the effects of superficial lime and silicate application on soil chemical
Bragantia. Publicado em: 21/07/2015
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11. CONTRIBUIÇÃO AO ESTUDO DE CAMPO CRISTALINO E TRANSIÇÕES 4f-4f EM SISTEMAS CONTENDO LANTANÍDEOS. / CONTRIBUTION TO THE STUDY OF CRYSTAL AND FIELD 4F-4F TRANSITIONS IN SYSTEMS CONTAINING LANTHANIDES.
A theoretical study of the interactions between the 4f electrons in lanthanide ions (Ln3 +) with the chemical environment was made using crystal field theory. The main effects were studied: change in position of the berycentre of the energy levels of the free ion, maximum splitting of the J level and contribution to 5D0-7F0 transition of Eu3+ ion. Use of sec
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/09/2012
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12. Recuperação de solo salino-sódico por fitorremediação com Atriplex nummularia ou aplicação de gesso. / Reclamation of saline-sodic soil by phytoremediation with Atriplex nummularia or application gypsum.
Arid and semi-arid environments may present salty soils, which hamper plant growth, being removed from productive process constituting degradation cores. Under these conditions, glycophyte plants cant growth because high levels of salts hinder their metabolism, however, for halophytes this is favorable environment and these plants may represent a key to soil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012