Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) despite being increasingly used as a method for microbial identification, still present limitations in which concerns the differentiation of closely related species. Bacillus pumillus and Bacillus safensis, are species of biotechnological and pharmaceutical significance, difficult to differentiate by con...

A chemometric study was carried out in order to typify cider apples according to their degree of ripening. Several chemical variables (sugars, organic acids, amino acids, polyphenols, and pectins) were analyzed using HPLC and FIA methods. Univariate data treatment was not sufficient to allow the apple varieties to be differentiated according to their stage of ripening. Two linear combinations o...

A three-way resolution method based on PARAFAC model was applied for the UV-Vis spectra to study the simultaneous degradation of anthocyanins extracted from fresh calyces of flowers of the Hibiscus sabdariffa. This methodology was used to resolve a chemical system, for which there was no a priori information about the composition or the pure spectra, a so-called black system. In the pH range fr...

This paper investigates the performance of a column classification system developed at the Katholieke Universiteit Leuven applied to pharmaceutical chromatographic analyses. The liquid chromatography assay of lamotrigine and related compounds was carried out according to the method prescribed in the European Pharmacopoeia monograph, using 28 brands of stationary phases. A ranking was built base...

Due to fenugreek based on different grown environment has vital differences in quality and physiological efficacy, this study focused on classification and identification of fenugreek seeds from different production areas using Fourier Transform Infrared (FT-IR) Spectroscopy coupled with cluster analysis. Chemometrics fequencies at 1800400 cm were exploited for the establishment of all chemomet...

A spectrophotometric method for selective complexation reaction and simultaneous determination of mycophenolate mofetil (MPM), and mycophenolic acid (MPA) using three multivariate chemometric methods, i.e. partial least squares regression, principal component regression and principal component artificial neural networks, is proposed. The method is based on the complexation reaction of ...

In light of the frequent occurrence counterfeit food sold in global commercial markets, it is necessary to verify authenticity tasty natural-plant-based products by checking their labels, as well pricing and quality control. Lemon juice has repeatedly been victim fraud attempts manufacturers lower price products. Electronic noses are used many fields, including beverage industry, for classifica...

The research paper demonstrates a comprehensive comparative analysis of the state coniferous plantations in Minsk areas with favourable and predominantly unfavourable ecological situation control trees growing relatively clean territories. morphological-anatomical bilateral (in terms fluctuating asymmetry) patterns needles Scots pine (Pinus sylvestris L.) change were revealed, reflecting severi...

Baseline correction is one of the pre-processing steps in the analysis of metabolite signals from chemometric analytical instruments. Fully automated baseline correction techniques, although more convenient to use, tend to be less accurate than semi-automated baseline correction. A fully automated baseline correction algorithm, the automated iterative moving averaging algorithm (AIMA), is prese...