Enginyeria Química i Química Analítica: Enviaments recents
Ara mostrant els elements 381-400 de 791
Recent advances in the determination of biogenic amines in food samples by (U)HPLC
The determination of biogenic amines (BAs) in food products stirs up an increasing interest because of the implications in toxicological and food quality issues. Apart from these aspects, in the last years, the relevance ...
Artomics: A holistic approach to the study of artworks integrating their compositional and formal characteristics. Application on the Liber Feudorum Maior
A novel analytical approach which combines the compositional and formal characteristics describing groups of artworks and their analysis using multivariate techniques is presented, under the title of Artomics. This approach ...
Characterization of the polyphenolic profile in tomato (Lycopersicon esculentum P. Mill) peel and seeds by LC-HRMS/MS
Peel and seeds are the main byproducts from tomato (Lycopersicon esculentum P. Mill) processing with high concentrations of polyphenols that have been underexploited. Herein, polyphenolic profiles in tomato peel and seeds ...
Application of solar-based oxidation to the management of empty pesticide container rinse water in Bolivia
Background: The management of empty pesticide containers (EPC) in Bolivia has been recently promoted as a control strategy for dispersed pollution in surface and underground water bodies, as well as in soil. It comprises ...
Determination of trace levels of nickel(II) by adsorptive stripping voltammetry using a disposable and low-cost carbon screen-printed electrode
A commercial and disposable screen-printed carbon electrode (SPCE) has been proposed for a fast, simple and low-cost determination of Ni(II) at very low concentration levels by differential pulse adsorptive stripping ...
Treatment of Diphenhydramine with diferent AOPs including photo-Fenton at circumneutral pH.
The degradation of diphenhydramine hydrochloride (DPH), via UV-vis/H2O2, Fenton, photo-Fenton and photocatalysis processes, was studied under different radiation sources. In addition, the Fenton and photo-Fenton processes ...
Authentication of paprika using HPLC-UV fingerprints
In this work we combine simple extraction and HPLC-UV methodologies with chemometric pattern-recognition strategies in order to obtain characteristic fingerprints of phenolic compounds that allow the authentication of ...
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 ...
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 ...
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 ...
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 ...
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 ...
Chemical characterization of fruits of Garcinia brasiliensis Mart.
The present study carried out a nutritional assessment of the pulp, peel, and seeds of fruits of bacupari (Garcinia brasiliensis). The proximate composition was carried out according to A.O.A.C. guide, organic acids by ...
The implications of particle energy and acidic media on gross alpha and gross beta determination using liquid scintillation
The interaction of humans with radioactivity present in the environment from natural and artificial sources necessitates an evaluation of its risk on human health. Gross alpha and gross beta activities can provide a rapid ...
New Octane Booster Molecules for Modern Gasoline Composition
In the framework of reducing GHG emissions and accelerating the decarbonization of the road transport sector, vehicle efficiency is a key factor for competitiveness. In this sense, the refining industry can make its ...
Socrative, una herramienta interactiva para el aprendizaje y la evaluación a través del móvil
Un 97% de los estudiantes universitarios en Estados Unidos disponen de un teléfono móvil inteligente o smartphone [1] y, por nuestras experiencias diarias en clase, me atrevería a afirmar que esta cifra no debe de ser muy ...
El fotorreactor elíptico
In this paper, the mathematical model of the elliptical photoreactor , an special type of reactor that uses ultraviolet radiation, is presented. In the elliptical photoreactor the cylindrical reactor is irradiated from the ...
Characterization and classification of Spanish honeydew and blossom honeys based on their antioxidant capacity
Honey is a very appreciated product for its nutritional characteristics and its benefits for human health, comprising antioxidant, anti-inflammatory, antifungal, and antibacterial activities. These attributes depend on the ...
Antimony speciation in spirits stored in PET bottles: identification of a novel antimony complex
Total antimony and its +V and +III oxidation state species were determined in twelve spirit samples (Greek raki and tsipouro) stored in polyethylene terephthalate bottles. Reliable and reproducible results were obtained ...
Mixtures of chelating agents to enhance photo-Fenton process at natural pH: Influence of wastewater matrix on micropollutant removal and bacterial inactivation
Three organic fertilizers (EDTA (Ethylenedinitrilotetraacetic acid), EDDS (Ethylenediamine-N, N′-disuccinic acid) and DTPA (Diethylene triamine pentaacetic acid)) were tested as Fe-complexes in photo-Fenton process at ...
