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The aim of this study was to evaluate and compare potential of different optical spectroscopic techniques for quality assessment of apple juices. The calibration partial least squares (PLS) regression models were developed and optimized for determination of quality parameters of apple juice non-destructively from the NIR spectra of fruit or directly from the UV-VIS-NIR spectra of juices. The external models validation was performed using the test sample set. Calibration models based on the NIR spectra of fruit were characterized by high predictive ability for soluble solids content, SSC (R2P = 0.93, RPDP = 3.5), moderate for titratable acidity, TA (R2P = 0.81, RPDP = 2.1), pH (R2P = 0.82, RPDP = 2.1) and ratio of SSC to TA, SSC/TA (R2P = 0.72, RPDP = 1.8), and low for total phenolic content, TPC (R2P = 0.44, RPDP = 1.3) and total flavonoid content, TFC (R2P = 0.49, RPDP = 1.2). The performance of PLS models based on the juice spectra was dependent on the spectral region used for analysis. The models with the highest predictive ability for SSC (R2P = 0.95, RPDP = 5.0) and TA (R2P = 0.96, RPDP = 4.6) were obtained using UV-VIS-NIR spectra of juice. The models with the highest predictive ability for SSC/TA (R2P = 0.89, RPDP = 3.0) and pH (R2P = 0.91, RPDP = 3.3) were obtained using VIS-NIR spectra. The optimal model for TPC (R2P = 0.95, RPDP = 4.1) was obtained using UV-VIS spectra, and for TFC using UV spectra of juices (R2P = 0.80, RPDP = 2.5). The results may contribute to the development of method for fast quality control of juices.
Katarzyna Włodarska; Paweł Piasecki; Ana Lobo-Prieto; Katarzyna Pawlak-Lemańska; Tomasz Górecki; Ewa Sikorska. Rapid screening of apple juice quality using ultraviolet, visible, and near infrared spectroscopy and chemometrics: A comparative study. Microchemical Journal 2021, 164, 106051 .
AMA StyleKatarzyna Włodarska, Paweł Piasecki, Ana Lobo-Prieto, Katarzyna Pawlak-Lemańska, Tomasz Górecki, Ewa Sikorska. Rapid screening of apple juice quality using ultraviolet, visible, and near infrared spectroscopy and chemometrics: A comparative study. Microchemical Journal. 2021; 164 ():106051.
Chicago/Turabian StyleKatarzyna Włodarska; Paweł Piasecki; Ana Lobo-Prieto; Katarzyna Pawlak-Lemańska; Tomasz Górecki; Ewa Sikorska. 2021. "Rapid screening of apple juice quality using ultraviolet, visible, and near infrared spectroscopy and chemometrics: A comparative study." Microchemical Journal 164, no. : 106051.
Characterizing consumers in terms of their propensity to practice sustainable consumption represents an interesting research challenge in which a crucial role is played by the questionnaire in terms of its structure and classification criteria. Various classification rules have been proposed in the literature, which can be used to identify consumer types and signify their propensity to practice the principles of sustainable development in daily life. In this paper, we based our approach in designing a classification tool on a combination of two elements: the concept of voluntary simplicity as a pillar for consumer characteristics and the idea of assessing consumers by using filters, in a modified form introducing many new aspects of life-cycle thinking. The tool proposed provides insight into the relationship between the consumer’s typology and behavior during purchasing decisions in daily life. The main function of the proposed tool is to assign respondents to one of the proposed consumer types distinguished and characterized in terms of many aspects of life cycle thinking. A pilot survey has been performed in order to verify the proposed tool, and the survey results have been presented in the paper, as well.
Anna Lewandowska; Joanna Witczak; Pasquale Giungato; Christian Dierks; Przemyslaw Kurczewski; Katarzyna Pawlak-Lemanska. Inclusion of Life Cycle Thinking in a Sustainability-Oriented Consumer’s Typology: A Proposed Methodology and an Assessment Tool. Sustainability 2018, 10, 1826 .
AMA StyleAnna Lewandowska, Joanna Witczak, Pasquale Giungato, Christian Dierks, Przemyslaw Kurczewski, Katarzyna Pawlak-Lemanska. Inclusion of Life Cycle Thinking in a Sustainability-Oriented Consumer’s Typology: A Proposed Methodology and an Assessment Tool. Sustainability. 2018; 10 (6):1826.
Chicago/Turabian StyleAnna Lewandowska; Joanna Witczak; Pasquale Giungato; Christian Dierks; Przemyslaw Kurczewski; Katarzyna Pawlak-Lemanska. 2018. "Inclusion of Life Cycle Thinking in a Sustainability-Oriented Consumer’s Typology: A Proposed Methodology and an Assessment Tool." Sustainability 10, no. 6: 1826.