Enginyeria Química i Química Analítica: Envíos recientes
Mostrando ítems 401-420 de 791
Aprendizaje basado en proyectos como estrategia metodológica en laboratorios de química analítica
Se ha implementado la estrategia metodológica de Aprendizaje Basado en Proyectos (ABP) en la asignatura de Laboratorio Básico de Química Analítica del Grado de Química de la Universidad de Barcelona, con el fin de ...
Scale invariants in the preparation of reverse high internal phase ratio emulsions
Reverse high internal phase ratio emulsions (HIPRE) are prepared with the system water/Span80/dodecane to identify the influence of the process variables on droplet size and polydispersity, and to study the influence of ...
Synthesis and characterization of epitope-imprinted polymers for purification of human hemoglobin
One promising method to prepare protein-selective polymers is the epitope-imprinting approach, where surface-accessible peptides from a target protein are used as templates to create surface-exposed binding sites on ...
Equilibrium conversion, selectivity and yield optimization of the simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol over Amberlyst 35
A prospective study on the product distribution at chemical equilibrium for the simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol over Amberlyst¿ 35 is presented. Experiments were performed ...
Determination of Sialic Acid Isomers from Released N-Glycans Using Ion Mobility Spectrometry
Complex carbohydrates are ubiquitous in nature and represent one of the major classes of biopolymers. They can exhibit highly diverse structures with multiple branched sites as well as a complex regio- and stereochemistry. ...
Recent advances in analytical methodologies based on mass spectrometry for the environmental analysis of halogenated organic contaminants
Halogenated organic contaminants, including legislated and potential persistent organic pollutants and their precursors, represent a major environmental concern due to their hazardous effects in humans and wildlife as well ...
Selective molecular probes for G-quadruplex and G-quadruplex–duplex junctions: Cyanine dye interactions and structural insight
There is growing interest in hybrid DNA structures, particularly G-quadruplex–duplex junctions, as potential ligand binding sites. In this work, we investigate the interaction of two cyanine dyes (R9 and 3b), which differ ...
Potential Use of Precipitates from Acid Mine Drainage (AMD) as Arsenic Adsorbents
The role of precipitates from acid mine drainage (AMD) in arsenic removal in water is a process to be investigated in more detail. The present study is focused on the potential use of two AMD precipitates using oxidation ...
Selenocystine modified screen-printed carbon electrode as an alternative sensor for the voltammetric determination of metal ions
Heavy metals are present in the environment from both natural and anthropogenic sources. Their bioaccumulation and persistence constitutes a serious threat to human health, demanding suitable methods for heavy metal ...
Nano-TiO2 phototoxicity in fresh and seawater: Daphnia magna and Artemia sp. as proxies
Nowadays, the industry is quite commonly using nanoparticles of titanium dioxide (nTiO2)especially in sunscreens, due to its higher reflective index in comparison to micron size TiO2. It shigh demand causes its widespread ...
Determination of polyphenols in spanish wines by capillary zone electrophoresis. Application to wine characterization by using chemometrics
A capillary zone electrophoresis method for the simultaneous determination of twenty polyphenols in wine was developed. The separation was performed using fused-silica capillaries of 75 µm I.D. and a 30 mM sodium tretraborate ...
An FIA-MS Method for Rapid Coffee Adulteration Detection: A Comparative Study with a Non-Targeted LC-MS Approach
Coffee adulteration is a growing concern in the food industry due to economic and quality implications. This study evaluates a rapid, non-targeted fingerprinting method based on flow injection analysis–mass spectrometry ...
Potentiometric CheqSol and standardized shake-flask solubility methods are complimentary tools in physicochemical profiling
The solubility of three drugs (glimepiride, pioglitazone, sibutramine) with different acid/base properties and expected supersaturation behavior was examined in detail using the shake-flask (SF) and potentiometric (CheqSol) ...
Skill development in experimental courses
Experimental courses offer a good opportunity to work with competences, promoting the incorporation of strategies oriented towards motivating students to actively involve in the learning process, promoting reflexive learning ...
Desarrollo de una mentoria de profesor novel. Profesionalización docente mediante la alternancia. Implicación de la estructuras institucionales: Universidad, Departamento, Grupo Docente
Se presenta una experiencia piloto de mentorización de profesorado novel en la que se combinan dos ámbitos de trabajo distintos: el Departamento de Ingeniería Química y el Máster de Docencia de Profesorado Novel (Instituto ...
Effects of the presence of Fe(0) on the sorption of lanthanum and lutetium mixtures in smectites
The sorption of La and Lu mixtures was examined in two bentonites after incubation for three months at 20 and 80 °C with Fe(0), as a laboratory approach to evaluate the effects of waste canister corrosion in a deep repository ...
Catalytic gasification of glycerol in supercritical water
The conversion of glycerol in supercritical water (SCW) was studied at 510-550 °C and a pressure of 350 bars using both a bed of inert and non-porous ZrO2 particles (hydrothermal experiments), and a bed of a 1% Ru/ZrO2 ...
Recovery of rare earth elements from acidic mine waters: An unknown secondary resource
Acidic mine Drainage (AMD) is still considered one of the greatest mining sustainability challenges due to the large volumes of wastes generated and the high associated treatment cost. New regulation initiatives on sustainable ...
Stabilization of telomeric i-motif structures by (2'S)-2'-deoxy-2'-C-methyl-cytidine residues
G-quadruplex and i-motif are tetraplex structures present in telomeres and promoter regions of oncogenes. The possibility of producing nanodevices with pH-sensitive functions has triggered the interest for modified ...
Kinetic study of 1-butanol dehydration to di-n-butyl ether over Amberlyst 70
Kinetics of the catalytic dehydration of 1-butanol to di-n-butyl ether (DNBE) over Amberlyst 70 was investigated. Experiments were performed in liquid phase at 4 MPa and 413 463 K. Three elementary reaction mechanisms were ...
