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Lignocellulosic derivative and chitosan bioadsorbent: Synthesis, characterization, and performance in chromium adsorption
(2020-03-14)
Environmental pollution with heavy metals, especially with hexavalent chromium, is a serious problem worldwide. Therefore, in this study, the synthesis, characterization, and application of a heavy metal bioadsorbent, ...
Preparação e caracterização físico-química de complexos de inclusão entre anestésicos locais e hidroxipropil-beta-ciclodextrina
(Sociedade Brasileira de Química, 2007-08-01)
S(-) Bupivacaine (S(-)BVC) and Lidocaine (LDC) are widely used local anesthetics (LA). Hydroxypropyl beta-cyclodextrin (HP-beta-CD) is used as a drug-carrier system. The aim of this work was to characterize inclusion ...
Synthesis, spectroscopic characterization and molecular modeling of a tetranuclear platinum(II) complex with thiazolidine-4-carboxylic acid
(Elsevier B.V., 2012-07-18)
The synthesis, spectroscopic characterization and molecular modeling of a novel tetranuclear platinum(II) complex with thiazolidine-4-carboxylic acid (THC) are described. Elemental analysis is consistent with the composition ...
Relative hydrogen index as a fast method for the simultaneous determination of physicochemical properties of petroleum fractions
(Elsevier Sci Ltd, 2017)
This work presents the use of the Relative Hydrogen Index (RHI) parameter obtained from the single-pulse Nuclear Magnetic Resonance (NMR) Free Induction Decay (FID) experiment as an efficient, fast and unique procedure for ...
Lignocellulosic derivative and chitosan bioadsorbent: Synthesis, characterization, and performance in chromium adsorption
(2020-03-14)
Environmental pollution with heavy metals, especially with hexavalent chromium, is a serious problem worldwide. Therefore, in this study, the synthesis, characterization, and application of a heavy metal bioadsorbent, ...
Effect of Counterions on the Shape, Hydration, and Degree of Order at the Interface of Cationic Micelles: the Triflate Case
(Amer Chemical Soc, 2013-04-02)
Specific ion effects in surfactant solutions affect the properties of micelles. Dodecyltrimethylammonium chloride (DTAC), bromide (DTAB), and methanesulfonate (DTAMs) micelles are typically spherical, but some organic ...
Characterization of humic acids from a Brazilian Oxisol under different tillage systems by EPR, C-13 NMR, FTIR and fluorescence spectroscopy
(Elsevier B.V., 2004-02-01)
The importance of soil organic matter functions is well known, but structural information, chemical composition and changes induced by anthropogenic factors such as tillage practices are still being researched. In the ...
A laser-induced fluorescence spectroscopic study of organic matter in a Brazilian Oxisol under different tillage systems
(Elsevier B.V., 2007-02-15)
Laser-induced fluorescence (LIF) spectroscopy has been proposed as new method for determining the degree of humification of organic matter (OM) in whole soils. It can be also used to analyze the OM in whole soils containing ...
Identification of the antimicrobial substances produced by Solanum palinacanthum (Solanaceae)
(Academia Brasileira de Ciências, 2008-09-01)
Com vistas a descobrir antimicrobianos de origem natural para uso terapêutico ou para a preservação de alimentos, o extrato metanólico das partes aéreas de Solanum palinacanthum foi submetido a fracionamentos direcionados ...
Isotopic effect on the gel and glass formation of a charged colloidal clay: laponite
(ACS Publications, 2018)