Enginyeria Química i Química Analítica: Recent submissions
Now showing items 281-300 of 791
Exploring the potential of co-fermenting sewage sludge and lipids in a resource recovery scenario
In this study, co-fermentation of primary sludge (PS) or waste activated sludge (WAS) with lipids was explored to improve volatile fatty acid production. PS and WAS were used as base substrate to facilitate lipid fermentation ...
Dehydration of 1-octanol to di-n-octyl ether in liquid phase with simultaneous water removal over ion exchange resins: Effect of working state morphologies
The influence of the concentration of polar reactants and products on the working-state morphology of ion exchange catalysts has been investigated over different acidic ion-exchange resins for di-n-octyl ether (DNOE) ...
Estudios experimentales en transmisión de calor. Balances de energía en un destilador de agua
Un destilador de agua es un elemento común en muchos laboratorios. Con pequeñas modificaciones puede emplearse como páctica para visualizar los balances de energia y hacer ver la influencia que sobre el rendimiento del ...
New approach to multivariate standard addition based on multivariate curve resolution by alternating least squares: Application to voltammetric data
A multivariate version of the classical univariate standard addition method is proposed for the analysis of samples generating overlapping signals in the presence of notorious matrix effects. Unlike previous versions based ...
Hydrophilic interaction liquid chromatography to characterize nutraceuticals and food supplements based on flavanols and related compounds
Purified extracts from different types of berries and medicinal plants are increasingly used as raw materials for the production of nutraceuticals and dietary supplements, mainly due to their high content of bioactive ...
Targeted UHPLC-HRMS (Orbitrap) polyphenolic and capsaicinoid profiling for the chemometric characterization and classification of paprika with protected designation of origin (PDO) attributes
Society's interest in the quality of food products with certain attributes has increased, the attribute of a Protected Designation of Origin (PDO) being an effective tool to guarantee the quality and geographical origin ...
Enhancement of volatile fatty acids production from food waste by mature compost addition
Food waste (FW) collected from a university canteen was treated in acidogenic fermenters to produce volatile fatty acids (VFA) under biological pretreatment with mature compost. Batch assays working at pH 6 revealed an ...
Characterization of Musts, Wines and Sparkling Wines Based on Their Elemental Composition Determined by ICP-OES and ICP-MS
The control of the composition of food products with protected designation of origin, such as wines and sparkling wines, is essential to prevent fraudulent practices and adulterations. A wide range of compounds can be used ...
Use of organic fertilizers in solar photo-Fenton process as a potential technology to remove pesticides from pineapple processing wastewater in Costa Rica
Background: This work studied the use of the organic fertilizers DTPA-Fe and EDDS-Fe as iron chelates for solar driven photo-Fenton process at natural pH. This process was proposed to investigate its performance on removing ...
Thermodynamics-Based Process Sustainability Evaluation
This article considers the problem of the evaluation of the sustainability of heterogeneous process systems, which can have different areas of focus: from single process operations to complete supply chains. The proposed ...
Recovery of Polyphenols from Agri-Food By-Products: The Olive Oil and Winery Industries Cases
The production of olive oil and wine are two of the main agri-food economic activities in Southern Europe. They generate large amounts of solid and liquid wastes (e.g., olive pomace, olive mill wastewater, grape pomace, ...
Laser-Induced Surface Vitrification for the Sustainable Stabilization of Copper Tailings
This study introduces CO2 laser surface vitrification as an innovative method for managing copper mining tailings, offering a sustainable solution to critical challenges in mineral processing. This technique transforms ...
Investigation of the Complexes Formed between PARP1 Inhibitors and PARP1 G-Quadruplex at the Gene Promoter Region
DNA repair inhibitors are one of the latest additions to cancer chemotherapy. In general, chemotherapy produces DNA damage but tumoral cells may become resistant if enzymes involved in DNA repair are overexpressed and are ...
Experimental Study on the Liquid-Phase Adsorption Equilibrium of n-Butanol over Amberlyst TM15 and Contribution of Diffusion Resistances
This work investigates the liquid-phase adsorption of n-butanol on Amberlyst 15 in the temperature range 295-323 K at different initial adsorbate concentrations. The adsorbent was characterized by N2 physisorption, Fourier ...
Determination of flavanols by líquid chromatography with fluorescence detection. Application to the characterization of cranberry-based pharmaceuticals through profiling and fingerprinting approaches
In this work, a new method based on reversed-phase high-performance liquid chromatography (HPLC) with fluorescence detection (FLD) was established for the determination of catechins and related oligomeric proanthocyanidins ...
Study of selenocompounds from selenium-enriched culture of edible sprouts
Selenium is recognised as an essential micronutrient for humans and animals. One of the main sources of selenocompounds in the human diet is vegetables. Therefore, this study deals with the Se species present in different ...
Nutritional, molecular, and functional properties of a novel enzymatically hydrolyzed porcine plasma product
In the present study, an enzymatically hydrolyzed porcine plasma (EHPP) was nutritionally and molecularly characterized. EHPP molecular characterization showed, in contrast to spray-dried plasma (SDP), many peptides with ...
In-line preconcentration capillary zone electrophoresis for the analysis of haloacetic acids in water
Two in-line enrichment procedures (large volume sample stacking (LVSS) and field amplified sample injection (FASI)) have been evaluated for the capillary zone electrophoresis (CZE) analysis of haloacetic acids (HAAs) in ...
Kinetics of 1-pentanol etherification without water removal
The effect of water on the kinetics of the liquid-phase dehydration of 1-pentanol to di-n-pentyl ether (DNPE) and water over Amberlyst 70 is revisited. To explain the strong inhibitor effect of water, two approaches were ...
Cyanobacteria and their secondary metabolites in three freshwater reservoirs in the United Kingdom
Background Bloom-forming cyanobacteria occur globally in aquatic environments. They produce diverse bioactive metabolites, some of which are known to be toxic. The most studied cyanobacterial toxins are microcystins, ...
