Results 11 to 20 of about 140,762 (162)
Interfacial Enrichment and Demetallation of a Zinc Porphyrin in the Ionic Liquid [C<sub>4</sub>C<sub>1</sub>Im][PF<sub>6</sub>]. [PDF]
ChemphyschemUpon dissolution of zinc porphyrins with long dodecyl chains in the ionic liquid [C4C1Im][PF6], partial [PF6]‐ hydrolysis occurs along spontaneous porphyrin demetallation. Driven by their buoy‐like chains, the free‐base porphyrins extremely enrich at the outermost surface as proven by angle‐resolved X‐ray photoelectron spectroscopy, an interesting ...
Ceccatto A +3 more
europepmc +2 more sources
Chemical Information From the Ehrenfest Force Field Based on Reduced Density Matrix Functional Theory. [PDF]
J Comput ChemReduced Density Matrix Functional Theory is evaluated as a practical route to approximate the exchange‐correlation contribution to the Ehrenfest force field. Across molecules from diatomics to polyatomics, it reproduces key bonding features and force‐field topologies while exposing limits in strongly correlated cases, enabling EhF analysis in larger ...
Mortera-Carbonell AJ +3 more
europepmc +2 more sources
Optimization of experimental conditions for skin-PAMPA measurements
ADMET and DMPK, 2020 In recent years, the parallel artificial membrane permeability assay (PAMPA) has been extended for prediction of skin permeation by developing an artificial membrane which mimics the stratum corneum structure, skin-PAMPA.
Sara Soriano-Meseguer +3 more
doaj +1 more source
Chitin based hybrid composites reinforced with graphene derivatives: a nanoscale study [PDF]
, 2015 In this work, we present two novel nanostructured hybrid materials based on a chitin matrix loaded with increasing amounts of graphene oxide and reduced graphene oxide nanosheets (nGO and rGO, respectively).
Copello, Guillermo Javier +5 more
core +2 more sources
Eclética Química, 2018 National Health Surveillance Agency (ANVISA) established in the decree number 54 maximum allowed levels for Ni and Pb in mineral and natural waters at 20 μg L-1 and 10 μg L-1, respectively.
Volnei Resta Amorim Filho +2 more
doaj +1 more source
Luminescent assays based on carbon dots for inorganic trace analysis
Reviews in Analytical Chemistry, 2015 Carbon dots (CDs) are a recently discovered class of fluorescent nanomaterials with great potential to be applied in the analytical field. CDs have demonstrated to be a promising alternative to conventional organic fluorophores or quantum dots as optical
Costas-Mora Isabel +3 more
doaj +1 more source
Educación Química, 2015 En el presente trabajo se hace un estudio del comportamiento de la capacidad buffer de sistemas polidonadores. Se analiza la capacidad buffer cuando los valores de pKa de los ácidos polipróticos están cercanos y alejados unos de otros. Además, se analiza
Norma Rodríguez-Laguna +2 more
doaj +1 more source
Intra-regional classification of grape seeds produced in Mendoza province (Argentina) by multi-elemental analysis and chemometrics tools [PDF]
, 2018 The feasibility of the application of chemometric techniques associated with multi-element analysis for the classification of grape seeds according to their provenance vineyard soil was investigated.
Canizo, Brenda Vanina +4 more
core +1 more source
Evolutionary and Functional Relationships in the Truncated Hemoglobin Family [PDF]
, 2016 Predicting function from sequence is an important goal in current biological research, and although, broad functional assignment is possible when a protein is assigned to a family, predicting functional specificity with accuracy is not straightforward ...
Boechi, Leonardo +5 more
core +3 more sources
Determination of zinc in fuel alcohol by anodic stripping voltammetry
Eclética Química, 2018 The presence of heavy metals in fuel ethanol is obtained in different steps as production and storage of ethanol, constituting an inorganic contamination. Quantitative analysis of these contaminants has been usually carried out by conventional techniques
Marcelo Firmino de Oliveira +3 more
doaj +1 more source