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Now showing items 141-150 of 175
Misinterpretation in microplastic detection in biological tissues: When 2D imaging is not enough
(Elsevier, 2023-06)
The presence of microplastics in the food chain is a public concern worldwide, and its analysis is an analytical challenge. In our research, we apply Raman imaging to study the presence of 1mum polystyrene microplastics ...
Deep learning for near-infrared spectral data modelling: Hypes and benefits
(Elsevier, 2022-12)
Deep learning (DL) is emerging as a new tool to model spectral data acquired in analytical experiments. Although applications are flourishing, there is also much interest currently observed in the scientific community on ...
Tooth whitening effects on dental enamel, oxidation or reduction? Comparison of physicochemical alterations in bovine enamel using Synchrotron-based Micro-FTIR
(Elsevier, 2022-04)
[EN] OBJECTIVES: To compare the side effects of typical whitening treatments (by means of oxidation) compared to the new treatment developed by the authors through reduction. The aim is to provide information about the ...
Data reduction by randomization subsampling for the study of large hyperspectral datasets
(Elsevier, 2022-05-29)
Large amount of information in hyperspectral images (HSI) generally makes their analysis (e.g., principal component analysis, PCA) time consuming and often requires a lot of random access memory (RAM) and high computing ...
1H–NMR fingerprinting and supervised pattern recognition to evaluate the stability of virgin olive oil during storage
(Elsevier, 2020-12-24)
Metabolomic fingerprinting of virgin olive oil (VOO) by 1H NMR spectroscopy was used to study its stability during storage simulating normal shelf life conditions during its commercialization. A representative set of VOOs ...
Stepwise strategy based on 1H-NMR fingerprinting in combination with chemometrics to determine the content of vegetable oils in olive oil mixtures
(Elsevier, 2022-01-01)
1H NMR fingerprinting of edible oils and a set of multivariate classification and regression models organised in a decision tree is proposed as a stepwise strategy to assure the authenticity and traceability of olive oils ...
The role of sample preparation in suspect and non-target screening for exposome analysis using human urine
(Elsevier, 2023-10)
The use of suspect and non-target screening (SNTS) for the characterization of the chemical exposome employing human biofluids is gaining attention. Among the biofluids, urine is one of the preferred matrices since organic ...
Exploratory optimisation of a LC-HRMS based analytical method for untargeted metabolomic screening of Cannabis Sativa L. through Data Mining
(Elsevier, 2023-10)
Background
Recent increase in public acceptance of cannabis as a natural medical alternative for certain neurological pathologies has led to its approval in different regions of the world. However, due to its previous ...
Exploring the Slow Magnetic Relaxation of a Family of Photoluminescent 3D Lanthanide–Organic Frameworks Based on Dicarboxylate Ligands
(MDPI, 2021-03-16)
A family of metal–organic frameworks with general formula {[Nd2(ant)2((NH2)2-bdc)(DMF)4]·2DMF}n (1) and {[Ln2(ant)2((NH2)2-bdc)(DMF)4]·2DMF·2H2O}n (Ln = Tb (2), Ho (3), and Er (4)) has been obtained from reactions between ...
Development of a Novel Method for the In-Situ Dechlorination of Immovable Iron Elements: Optimization of Cl- Extraction Yield Through Experimental Design
(Springer, 2021-05-24)
The conservation of iron objects exposed to marine aerosol is threatened by the formation of akaganeite, a highly unstable Cl-bearing corrosion phase. As akaganeite formation is responsible of the exfoliation of the rust ...