![]() Mazur L, Peralta-Zamora PG, Demczuk B, Hoffmann Ribani R (2014) Application of multivariate calibration and NIR spectroscopy for the quantification of methylxanthines in yerba mate ( Ilex paraguariensis). Matsunaga FT, Rakocevic M, Brancher JD (2014) Modeling the 3D structure and rhythmic growth responses to environment in dioecious yerba-mate. Marcheafave GG, Tormena CD, Terrile AE et al (2021) Ecometabolic mixture design-fingerprints from exploratory multi-block data analysis in Coffea arabica beans from climate changes: Elevated carbon dioxide and reduced soil water availability. Marcheafave GG, Pauli ED, Tormena CD et al (2020) Irrigated and CO 2 level effects on metabolism in Coffea arabica beans from mixture design – near infrared fingerprints. Kennard RW, Stone LA (1969) Computer aided design of experiments. Embrapa Florestas-Comunicado Técnico (INFOTECA-E). Helm CV, Ruiz HZ, Hansel FA, Stuepp CA, Wendling I (2015) Efeito do solvente na extração de teobromina e cafeína em progênies de erva-mate. Gokulakrishnan S, Chandraraj K, Gummadi SN (2005) Microbial and enzymatic methods for the removal of caffeine. Giberti G (1989) Los parientes silvestres de la yerba mate y el problema de su adulteración. įayad E, El-Sawalhi S, Azizi L et al (2020) Yerba mate ( Ilex paraguariensis) a potential food antibacterial agent and combination assays with different classes of antibiotics. Įckerstorfer MF, Engelhard M, Heissenberger A et al (2019) Plants developed by new genetic modification techniques-comparison of existing regulatory frameworks in the EU and non-EU countries. Ĭhicco D, Jurman G (2020) The advantages of the Matthews correlation coefficient (MCC) over F1 score and accuracy in binary classification evaluation. ![]() cultivadas sob sombreamento e a pleno sol. CRC Press, Boca RatonĬaron BO, Schmidt D, Manfron PA et al (2014) Eficiência do uso da radiação solar por plantas Ilex paraguariensis A. īurns DA, Ciurczak EW (eds) (2008) Handbook of near-infrared analysis, 3rd edn. John Wiley & Sonsīro R, Smilde AK (2014) Principal component analysis. īrereton RG (2018) Chemometrics: data driven extraction for science, Second Edition. īrandt M, Silva NS (2014) A coleta da erva-mate pela população cabocla do vale do rio do peixe e oeste de santa catarina: apropriação privada da terra e rupturas (décadas de 1900 a 1940). Graphical AbstractīonfattiJúnior EA, Lengowski EC, LudkaJúnior A (2018) Mapeamento do processo produtivo de erva-mate. This indicates that the caffeine synthesis in yerba mate plants represents an adaptative strategy to elevated light conditions. Principal component analysis of the NIR spectra demonstrated that shading affected the chemical composition more in high-caffeine clones than in decaffeinated ones. Wilcoxon signed classification, sign classification in pairs, and randomization t-tests showed an excellent model fit. Specificity greater than 97.12% was found for both sets, with an efficiency rate of 96.82% for the training set and 95.31% for the test set. The PLS-DA model showed a sensitivity of 96.52% for the training set and 93.33% for the test set. Robustness of the mathematical model was verified for plants with all these shading levels. Yerba mate plants were cultivated in the semi-hydroponic system under five plant shading levels (0%, 40%, 51%, 76%, and 82%). ![]() Partial least squares-discriminant analysis (PLS-DA) was used to identify chemically differentiated yerba mate plants together with reflectance measurement (900–1700 nm) near-infrared spectroscopy (NIRS) in direct analysis of plant material. Quality control strategies for this type of food are essential, and multivariate tools can help in this procedure. Genetically improved yerba mate clones are classified into two groups of interest to a selective consumer public, decaffeinated and high caffeine plants. Yerba mate plants are part of the ombrophilous mixed forest with araucaria trees. ![]()
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