Enginyeria Química i Química Analítica: Enviaments recents
Ara mostrant els elements 41-60 de 790
Gamma distribution function to understand anaerobic digestion kinetics: Kinetic constants are not constant
The Gamma model is a novel approach to characterise the complex degradation dynamics taking place during anaerobic digestion. This three parameters model results from combining the first-order kinetic model and the Gamma ...
Tutorial on modelling chromatographic surrogation of biological processes
The accurate emulation of biological partition systems through physicochemical models is crucial in pharmacology,</p><p>toxicology, and environmental science for understanding the ADMET profiles of substances. Direct</p> ...
Anaerobic membrane bioreactor performance at different wastewater pre-concentration factors: An experimental and economic study
This research evaluated the performance of a lab-scale anaerobic membrane bioreactor (AnMBR) treating municipal sewage pre-concentrated by forward osmosis (FO). The organic loading rate (OLR) and sodium concentrations of ...
Determination of dyes in candies in an analytical chemistry laboratory subject
The use of everyday life samples in laboratory subjects enhances motivation among students and, therefore, improves their learning outcomes. Candies are a common sample in students’ everyday life, which makes their dye ...
RBD-Based ELISA and Luminex Predict Anti-SARS-CoV-2 Surrogate-Neutralizing Activity in Two Longitudinal Cohorts of German and Spanish Health Care Workers
The ability of antibodies to neutralize severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is an important correlate of protection. For routine evaluation of protection, however, a simple and cost-efficient ...
Polyphenolic Profiling of Coffee Beverages by Liquid Chromatography-High-Resolution Mass Spectrometry for Classification and Characterization
The importance of monitoring the presence of bioactive compounds as food attributes for sample classification and characterization is increasing. In this study, targeted Liquid Chromatography coupled with High-Resolution ...
Detection and quantitation of frauds in the authentication of cranberry-based extracts by UHPLC-HRMS (Orbitrap) polyphenolic profiling and multivariate calibration methods
UHPLC-HRMS (Orbitrap) polyphenolic profiling was applied to the characterization, classification and authentication of cranberry-based natural and pharmaceutical products. 53 polyphenolic standards were characterized to ...
Experimental and Modeling Study of the Nanofiltration of Alcohol-Based Molecules and Amino Acids by Commercial Membranes
The nanofiltration performance of three commercial membranes was analyzed by the Steric Pore Model (SPM) and the extended Nernst–Planck diffusion equation inside membrane pores. The model was completed with the equation ...
Integration of commercial screen-printed electrodes into a voltammetric electronic tongue for the analysis of aminothiols
A voltammetric sensor array (or electronic tongue) is developed for the simultaneous quantification of cysteine, glutathione and homocysteine without need of previous separation. It is based on the integration of three ...
Phosphorene and other layered pnictogens as a new source of 2D materials for electrochemical sensors
Following the great success of graphene as a versatile 2D nanomaterial for the design of electrochemicalsensors, this review focuses on the synthesis, characterization, and electrochemical sensing applicationsof alternative ...
Recovery of added-value compounds from orange and spinach processing residues: green extraction of phenolic compounds and evaluation of antioxidant activity
Phenolic compounds recovery by mechanical stirring extraction (MSE) was studied from orange and spinach wastes using water as a solvent. The statistical analysis showed that the highest total polyphenol content (TPC) yield ...
High-performance liquid chromatography with fluorescence detection fingerprinting combined with chemometrics for nut classification and the detection and quantitation of almond-based product adulterations
Economically motivated food fraud has increased in recent years, with adulterations and substitutions of high-quality products being common practice. Moreover, this issue can affect food safety and pose a risk to human ...
Sorption of perfluoroalkyl substances in sewage sludge
The sorption behaviour of three perfluoroalkyl substances (PFASs) (perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA) and perfluorobutanesulfonic acid (PFBS)) was studied in sewage sludge samples. Sorption ...
Lipophilicity of amphoteric and zwitterionic compounds: a comparative study of determination methods
Common drugs intended for action in plasma (antibacterials, antiallergics, diuretics¿) often display both acidic and basic behavior, and some of these amphoteric compounds can appear as zwitterions. In such cases, accurate ...
Study on the removal of biodegradable NOM from seawater using biofiltration
Despite the low biodegradability of seawater NOM, problems associated with biofouling are common in facilities that handle seawater. In this work, a fixed-film aerobic biofilter is proposed as an effective unit for preventing ...
Inorganic arsenic determination in food: a review of analytical proposals and quality assessment over the last six years
Here we review recent developments in analytical proposals for the assessment of inorganic arsenic (iAs) content in food products. Interest in the determination of iAs in products for human consumption such as food ...
Atomistic simulations of the structure of highly crosslinked poly(styrene-co-divinylbenzene) ion exchange resins
The microscopic structures of highly crosslinked sulfonated poly(styrene-co-divinylbenzene) resins have been modeled by generating atomistic microstructures using stochastic-like algorithms, which are subsequently relaxed ...
Study of seawater biofiltration by measuring adenosine triphosphate (ATP) and turbidity
In the present study, we examined seawater biofiltration in terms of adenosine triphosphate (ATP) and turbidity. A pilot biofilter continuously fed with fresh seawater reduced both turbidity and biological activity measured ...
Seguimiento continuo del proceso de gelificacion de alcoxidos de silicio y titanio mediante ensayos reologicos
En este trabajo se ha estudiado el proceso de gelificación desde un nuevo punto de vista: el seguimiento de la transición solgel mediante la evolución con el tiempo de la distribución de tiempos de relajación, que está ...
Antimony in Polyethylene Terephthalate-Bottled Beverages: The Migration Puzzle
A novel strategy to assess the main variables that potentially affect the migration of antimony from PET bottles to beverages, including mineral waters and juices, is herein proposed. In a preliminary step, an LC-ICP-MS ...
