Enginyeria Química i Química Analítica: Enviaments recents
Ara mostrant els elements 81-100 de 790
Estimation of the octanol-water distribution coefficient of basic compounds by a cationic microemulsion electrokinetic chromatography system
The octanol-water partition coefficient (Po/w), or the octanol-water distribution coefficient (Do/w) for ionized compounds, is a key parameter in the drug development process. In a previous work, this parameter was estimated ...
Effects of combined d-fagomine and omega-3 PUFAs on gut microbiota subpopulations and diabetes risk factors in rats fed a high-fat diet
Food contains bioactive compounds that may prevent changes in gut microbiota associated with Westernized diets. The aim of this study is to explore the possible additive effects of d-fagomine and ω-3 PUFAs (EPA/DHA 1:1) ...
Customized in situ functionalization of nanodiamonds with nanoparticles for composite carbon-paste electrodes
The incorporation of nanomaterials on (bio)sensors based on composite materials has led to important advances in the analytical chemistry field due to the extraordinary properties that these materials offer. Nanodiamonds ...
Occupational risk assessment in AOPs labs and management system that comply with UN sustainable development goals
Accidents in chemical laboratories are usually less significant than in the chemical industry but, sometime, they have serious consequences. As mandated by legislation, risk assessment is also needed at laboratory. In the ...
Role of ion-exchange resins as catalysts in the reaction-network of transformation of biomass into biofuels
The use of acidic ion exchange resins on the transformation of biomass into biofuels is revised and their potential application is presented. Relationships between morphology and structure of resins and their catalytic ...
Thermodynamic analysis of the experimental equilibria for the liquid-phase etherification of isobutene with C1 to C4 linear primary alcohols
The chemical equilibrium of the liquid-phase syntheses of 2-methoxy-2-methylpropane (MTBE), 2-ethoxy-2-methylpropane (ETBE), 2-methyl-2-propoxypropane (PTBE), and 1-tert-butoxybutane (BTBE) by reaction of isobutene with ...
SPME-GC-MS and chemometrics for coffee characterization, classification and authentication
In recent decades, the complexity of the food chain has contributed to a surge of food adulteration issues, resulting in numerous instances of food fraud. For this reason, ensuring the authenticity of food is crucial for ...
The effect of l-thymidine, acyclic thymine and 8-bromoguanine on the stability of model G-quadruplex structures
Background Guanine-rich oligonucleotides are capable of forming tetrahelical structures known as G-quadruplexes with interesting biological properties. We have investigated the effects of site-specific substitution in the ...
Recovery of natural polyphenols from spinach and orange by-products by pressure-driven membrane processes
Spinach and orange by-products are well recognized for their health benefits due to the presence of natural polyphenols with antioxidant activity. Therefore, the demand to produce functional products containing polyphenols ...
Analysis of corticosteroids in samples of animal origin using QuEChERS and ultrahigh-performance liquid chromatography coupled to high-resolution mass spectrometry.
A rapid and sensitive method for the confirmatory analysis of 8 synthetic corticosteroids (betamethasone, dexamethasone, prednisolone, 6 methyl prednisolone, triamcinolone, flumethasone, beclomethasone, fluocinolone ...
High-resolution mass spectrometry applied to the identification of transformation products of quinolones from stability studies and new metabolites of enrofloxacin in chicken muscle tissues
The aim of this work was the identification of new metabolites and transformation products (TPs) in chicken muscle from Enrofloxacin (ENR), Ciprofloxacin (CIP), Difloxacin (DIF) and Sarafloxacin (SAR), which are antibiotics ...
Enhancing glycopeptide annotation and glycan localization using electron activated dissociation through a multiplexed parallel reaction monitoring design of experiments
We present an optimized electron activated dissociation (EAD) methodology, based on hot electron capture dissociation, for liquid chromatography-tandem mass spectrometry characterization of N- and O-glycopeptides, using ...
Influence of acid ion-exchange resins morphology in swollen state on the synthesis of ethyl octyl ether from ethanol and 1-octanol
Ethyl-octyl ether (EOE) liquid phase synthesis from ethanol and 1-octanol over ion-exchange resins is feasible at 423K, though di-ethyl ether and di-n-octyl ether were also formed. The influence of the catalyst morphology ...
Classification and authentication of spices and aromatic herbs by means of HPLC-UV and chemometrics
Recent increase in the adulteration of spices and aromatic herbs in food industry constitutes a problem that requires exhaustive quality control. As every spice has a different composition with characteristic biomarkers, ...
Competency training of students of the Faculty of Chemistry of the University of Barcelona by conducting internal audits
This work deals with the competences and skills training of the students of the Faculty of Chemistry of the University of Barcelona (UB) through participation in internal audits at different laboratories in which different ...
Virtual Cocrystal Screening of Adefovir Dipivoxyl: Identification of New Solid Forms with Improved Dissolution and Permeation Profiles
The application of a computational screening methodology based on the calculation of intermolecular interaction energies has guided the discovery of new multicomponent solid forms of the oral antiviral Adefovir Dipivoxyl. ...
Cálculo de evaporadores de múltiple efecto en paralelo. Parte I: Modelo matemático y análisis del mismo
En el presente artículo se desarrolla el modelo matemático de un sistema de evaporadores de múltiple efecto operando en paralelo. Se analiza asimismo el modelo matemático para hallar el número de grados de libertad del ...
Dewaterability of sewage sludge by ultrasonic, thermal and chemical treatments
Sludges resulting from wastewater treatment processes have a characteristically high water content, which complicates handling operations such as pumping, transport and disposal. To enhance the dewatering of secondary ...
Introducción de estrategias de aula invertida para la mejora del proceso de aprendizaje del estudiante.
This work deals about the development and implementation of several flipped classroom strategies based on web 2.0 tools in the subject of Analytical Chemistry in the Degrees of Chemistry, Pharmacy and Chemical Engineering ...
Introducción de estrategias de aula invertida para la mejora del proceso de aprendizaje del estudiante. Asignatura de Química Analítica de diferentes grados de la Universidad de Barcelona
This work deals about the development and implementation of several flipped classroom strategies based on web 2.0 tools in the subject of Analytical Chemistry in the Degrees of Chemistry, Pharmacy and Chemical Engineering ...
