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Desenvolvimento de metodologia espectrofotométrica multivariada para o controle de qualidade da associação acido kojico e hidroquinona em dermocosméticos
(UNIVERSIDADE ESTADUAL DE PONTA GROSSABRQuímicaPrograma de Pós-Graduação em Química AplicadaUEPG, 2017)
Relationships between PCA and PLS-regression
(Elsevier Science, 2014-01)
This work aims at comparing several features of Principal Component Analysis (PCA) and Partial Least Squares Regression (PLSR), as techniques typically utilized for modeling, output prediction, and monitoring of multivariate ...
Non-invasive spectroscopic methods to estimate orange firmness, peel thickness, and total pectin content
(2017-07-01)
Orange firmness, peel thickness, and total pectin content are associated with fruit quality and denote important parameters for the food industry. These attributes are usually determined through destructive methods that ...
Mapping of clay, iron oxide and adsorbed phosphate in Oxisols using diffuse reflectance spectroscopy
(Elsevier B.V., 2015-08-01)
Diffuse reflectance spectroscopy (DRS) provides a rapid, non-destructive, less expensive and sustainable complement to conventional methods of soil analysis. This study aims to assess the DRS ability to predict contents ...
Determination of ‘Palmer’ mango maturity indices using portable near infrared (VIS-NIR) spectrometer
(2017-08-01)
‘Palmer’ mango cultivar is a late season variety which is greatly accepted by European consumers. However, it is common to get reports of fruit quality problems, mainly due to maturity. Thus, the objective of this study ...
Comparison of univariate and multivariate calibration for the determination of micronutrients in pellets of plant materials by laser induced breakdown spectrometry
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)
The application of laser induced breakdown spectrometry (LIBS) aiming the direct analysis of plant materials is a great challenge that still needs efforts for its development and validation. In this way, a series of ...
Evaluation of prediction models of chemical composition and gross energy of kikuyo (Pennisetum clandestinum) using near infrared spectroscopy (NIRS)Evaluación de modelos de predicción de composición química y energía bruta de kikuyo (Pennisetum clandestinum) usando espectroscopía en infrarrojo cercano (NIRS)
(Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria, 2019)
Direct determination of monosaccharides in honey by coupling a sensitive new Schiff base Ni complex electrochemical sensor and chemometric tools
(Elsevier Science SA, 2020-06)
The determination and quantification of saccharides is of considerable importance in the food industry among other fields. In this work, we describe for the first time the preparation of the Schiff base Ni complex, ...
Accuracy and limitations for spectroscopic prediction of leaf traits in seasonally dry tropical environments
(2020-07-01)
Generalized assessments of the accuracy of spectroscopic estimates of ecologically important leaf traits such as leaf mass per area (LMA) and leaf dry matter content (LDMC) are still lacking for most ecosystems, and ...