Zoekresultaten - 19 results
Spectroscopic approaches for conformity analysis of e-liquids
squares-discriminant analysis (PLS- DA) and soft independent modelling by class analogy (SIMCA), was used to classify samples according to the presence of nicotine and/or the targeted additives. The results allowed to ...
Development and validation of chromatographic methods for screening and subsequent quantification of suspected illegal antimicrobial drugs encountered on the Belgian market.
agents, 1 antifungal agent and 1 beta-lactamase inhibitor, covering eleven different antibacterial classes, were selected. The UHPLC- MS screening method with gradient elution is able to selectively detect ...
Development and validation of chromatographic methods for screening and subsequent quantification of suspected illegal antimicrobial drugs encountered on the Belgian market
SF-antimicrobials. According to their popularity as SF-antimicrobials, 31 antibiotics, 3 antibacterial agents, 1 antifungal agent and 1 beta-lactamase inhibitor, covering eleven different antibacterial classes, were ...
Chemometrics and chromatographic fingerprints to classify plant food supplements according to the content of regulated plants.
objective way. Two approaches were followed: (1) a multiclass model, (2) 2-class model for each of the targeted plants separately. For both approaches good classification models were obtained, especially when ...
Three-dimensional aesthetic assessment of class II patients before and after orthognathic surgery and its association with quantitative surgical changes.
Maxillofac Surg (2017) Abstract: The aim of this study was to compare evaluations of the aesthetic outcome of class II orthognathic patients, as performed by observers with varying expertise using ...
Inter-laboratory study of human in vitro toxicogenomics-based tests as alternative methods for evaluating chemical carcinogenicity: a bioinformatics perspective.
identification of experimental outliers, (2) overall assessment of robustness and inter-laboratory reproducibility and (3) re-classification of the unknown compounds to the respective toxicity classes. In summary, ...
Chromatographic impurity fingerprinting of genuine and counterfeit Cialis® as a means to compare the discriminating ability of PDA and MS detection.
supervised Partial Least Squares and its discriminant variant (PLS, PLS- DA) as well the classification methods including Soft Independent Modelling of Class Analogy (SIMCA) and the k Nearest Neighbour ...
Detection and risk evaluation of counterfeit medicines based on physico-chemical properties: the fingerprint and chemometrics approach
a suitable analytical technique can be selected. In the future, this working strategy could potentially be expanded to other pharmacological classes of counterfeit medicines such as sleeping aids and ...
The Monte Carlo validation framework for the discriminant partial least squares model extended with variable selection methods applied to authenticity studies of Viagra® based on chromatographic impurity profiles.
usefulness of the diagnostic logic rule obtained from the partial least squares discriminant model (PLS- DA) that was built to discriminate authentic Viagra® samples from counterfeits (a two-class problem). ...
Testing of complementarity of PDA and MS detectors using chromatographic fingerprinting of genuine and counterfeit samples containing sildenafil citrate.
discrimination was obtained. When only using data measured at 254 nm, good classification models can be obtained by k nearest neighbors (kNN) and soft independent modelling of class analogy (SIMCA), which might be ...