Enginyeria Química i Química Analítica: Enviaments recents
Ara mostrant els elements 221-240 de 791
Direct solid sample analysis with graphite furnace atomic absorption spectrometry -A fast and reliable screening procedure for the determination of inorganic arsenic in fish and seafood
Direct solid sample analysis with graphite furnace atomic absorption spectrometry (SS-GF AAS) was investigated initially with the intention of developing a method for the determination of total As in fish and other seafood. ...
Characterization of turmeric and curry samples by liquid chromatography with spectroscopic detection based on polyphenolic and curcuminoid contents
This paper deals with the characterization of turmeric and related products using the compositional fingerprints of curcuminoids (e.g. curcumin, demethoxycurcumin and bisdemethoxycurcumin) and other phenolic compounds (e.g. ...
Didàctica: Una aportació en la docència de la química a la frontera secundària-universitat: les jornades 'Fem química al laboraori' a la Facultat de Química de la Universitat de Barcelona
[cat] L'any 2002 un grup de professors de la Facultat de Química de la Universitat de Barcelona va posar en marxa «Fem química al laboratori», una nova activitat docent, amb l'objectiu de contribuir a la formació dels ...
Aggregation induced nucleic acids recognition by homodimeric asymmetric monomethyne cyanine fluorochromes in mesenchymal stem cells
In the light of recent retrovirus pandemics, the issue of discovering new and diverse RNA-specific fluorochromes for research and diagnostics became of acute importance. The great majority of nucleic acid-specific probes ...
Kernelizing: A way to increase accuracy in trilinear decomposition analysis of multiexponential signals
The unmixing of multiexponential decay signals into monoexponential components using soft modelling approaches is a challenging task due to the strong correlation and complete window overlap of the profiles. To solve this ...
Process performance and precipitate quality of phosphorus recovery by struvite precipitation in a fluidized bed reactor using a MgO industrial by-product
Phosphorus recovery through struvite precipitation has gained interest due to the potential use of struvite as a fertiliser, with fluidised bed reactors being a popular technology for carrying out the process. Struvite ...
Determination of phenolic compounds in paprika by ultrahigh performance liquid chromatography-tandem mass spectrometry: application to product designation of origin authentication by chemometrics
A UHPLC-ESI-MS/MS method was developed for the determination of 36 phenolic compounds in paprika. The proposed method showed good method performance with limits of quantitation between 0.03 - 50 µg/L for 16 compounds, and ...
La clase inversa como estrategia de enseñanza-aprendizaje en modalidad virtual en la asignatura de Química Analítica.
Este trabajo describe la implementación de las estrategias de clase inversa en la asignatura de Química Analítica de los Grados de Química, Farmacia e Ingeniería Química de la Universitat de Barcelona (UB) como metodología ...
Liquid Chromatography-High-resolution Mass Spectrometry (LC-HRMS) Fingerprinting and Chemometrics for Coffee Classification and Authentication
Nowadays, the quality of natural products is an issue of great interest in our society due to the increase in adulteration cases in recent decades. Coffee, one of the most popular beverages worldwide, is a food product ...
G-quadruplex binding properties of a potent PARP-1 inhibitor derived from 7-azaindole-1-carboxamide
oly ADP-ribose polymerases (PARP) are key proteins involved in DNA repair, maintenance as well as regulation of programmed cell death. For this reason they are important therapeutic targets for cancer treatment. Recent ...
Occurrence of arsenic species in algae and freshwater plants of an extreme arid region in northern Chile, the Loa River Basin
This study reports data on arsenic speciation in two green algae species (Cladophora sp. and Chara sp.) and in five aquatic plants (Azolla sp., Myriophyllum aquaticum, Phylloscirpus cf. desserticola, Potamogeton pectinatus, ...
1-Butanol adsorption in poly(styrene-divinylbenzene) ion exchange resins for catalysis
The swelling behaviour of poly(styrene-co-divinylbenzene), P(S-DVB), ion exchange resins in 1-butanol (BuOH) has been studied by means of atomistic classical molecular dynamics simulations (MD). The topological characteristics ...
Viral uncoating is directional: exit of the genomic RNA in a common cold virus starts with the poly-(A) tail at the 3′-end
Upon infection, many RNA viruses reorganize their capsid for release of the genome into the host cell cytosol for replication. Often, this process is triggered by receptor binding and/or by the acidic environment in ...
Bioethanol dehydration and mixing by heterogeneous azeotropic distillation
Bioethanol is mixed with gasoline according to many countries' legislation pursuing environmental sustainability by reducing the use of fossil fuels. Bioethanol is produced by fermentation of many organic waste or biomass ...
Enrichment of histidine containing peptides by on-line immobilized metal affinity solid-phase extraction capillary electrophoresis-mass spectrometry
The analysis and detection of targeted peptides has received due attention in many fields of proteomics research, such as discovery of biomarkers. In this regard, capillary electrophoresis-mass spectrometry (CE-MS) is ...
Setup and validation of shake-flask procedures for the determinationof partition coefficients (log D) from low drug amounts
Several procedures based on the shake-flask method and designed to require a minimum amount of drug for octanol-water partition coefficient determination have been established and developed. The procedures have been validated ...
Using a batch test to derive sorption data of fluoroquinolone antibiotics in humic acids
Fluoroquinolone antibiotics (FQs) are of concern due to their disrupting effects on environmental bacterial communities. Evaluating FQ sorption by soil components is important to understand their interaction with soils and ...
Illuminated manuscript analysis methodology using MA-XRF and NMF: Application on the Liber Feudorum Maior
The determination of the composition of illuminated manuscripts' components is an important tool for the better understanding of their history, their origin and the procedures carried out for their elaboration, providing ...
Evaluation of ion mobility for the separation of glycoconjugate isomers due to different types of sialic acid linkage, at the intact glycoprotein, glycopeptide and glycan level
The study of protein glycosylation can be regarded as an intricate but very important task, making glycomics one of the most challenging and interesting, albeit under-researched, type of 'omics' science. Complexity escalates ...
Assessment of paprika geographical origin fraud by high-performance liquid chromatography with fluorescence detection (HPLC-FLD) fingerprinting
Paprika production under the protected designation of origin (PDO) standardized procedures leads to more quality products. However, it is also related to higher retail prices, making them susceptible to adulteration with ...
