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Diffuse reflectance UV-VIS Spettroscopy in food monitoring,
... However, the aromatic profile of plums, as of most stone fruit species, is even more affected by the total titratable acidity (TA) value than to the sugar content (CRISOSTO et al., 2004;CRISOSTO et al., 2007). Many studies (ZIOSI et al., 2008;INFANTE et al., 2011) have revealed a close correlation between chlorophyll content within the pulp tissues of the stone fruit and the ripening degree of the fruit; this evidence demonstrates that visible UV spectroscopy is a non-destructive technique which could be considered useful for monitoring and characterising the different stages of fruit ripening (ZUDE et al., 2003;CECCARELLI et al., 2008). It is therefore evident that the evaluation of the effectiveness of any post-harvest treatment should consider the uniformity of the fruit by including multiple quality indices; this aspect should be more valuable for those cultivars that are often considered minor for the lower diffusion but with a high commercial capacities if new post-harvesting techniques, such as modified atmosphere packaging (MAP), are developed. ...
... The colour parameter (lightness and chromaticity), linked to the chlorophyll content of the plums, is well known to be particularly appreciated by the consumers and for this it can be suggested to further evaluation of the performance of the tested films for the management of a MAP storage protocol. Results of this research confirm the correlation that exists between colour and the pigments content in organic matrices and more generally within food systems (RAMAKRISHNAN and FRANCIS, 1973;FRANCIS, 1985;WATADA and ABBOTT, 1975;TAKAHATA et al., 1993;AMENY and WILSON, 1997;CHEN and TANG, 1998;ARIAS et al., 2000;BRON et al., 2005;CECCARELLI et al., 2008). According to McGuire (1992) the monitoring of the total total chlorophyll content is highly correlated with the colour parameters, then it is important to consider also that it derives from a non-destructive technique such as UV-Vis whose numerous advantages are even more interesting when they can be applied to cultivars of excellence and high perishability such as those considered within this study. ...
The use of quality indicators is crucial in selling plums in more distant markets and the evaluation of freshness through multiple index is fundamental to evaluate the goodness of the storage technique. In this study we evaluated the quality of two european plums cultivars ('Ramasin' and 'Ariddo di Core' with purple and yellow flesh colour respectively) after modified atmosphere packaging (MAP) storage, through the selection of the most appropriate indicators. The headspace gas composition, the flesh fruit firmness (FFF), the soluble solid content (SSC), the titratable acidity (TA), the colour and the chlorophyll content of plums wrapped with 5 different films (F1, F2, F3, F4 and F5) were evaluated for up 21 days of storage (at 1±1°C and 90-95% relative humidity). For both cultivars, the multilayered films (F1 and F2, 90 and 65 µm respectively) offered better effectiveness over other films. The total chlorophyll concentration, showing a good correlation with the colorimetric parameters of luminance (L*) and chroma (respectively R 2 =0.92 and R 2 = 0.96) confirmed, in the case of the Ariddo di Core cultivar, the results obtained by monitoring other parameters thus highlighting the usefulness of integrating multiple indexes in evaluating the performance of the storage methods used.
... A few studies have dealt with meat products 41 , and although the results are less promising compared with visible, NIR and MIR spectroscopy, they www.nature.com/scientificreports/ improve overall when combined with visible light (UV-Vis) 33,42 . The present study is the first to find batch/date of slaughter to be an important source of variation in ultraviolet absorbance (14% of total variance; Table 1), or at least in near ultraviolet absorption as our instrument does not measure absorbance of deep ultraviolet radiation. ...
Spectroscopic predictions can be used for the genetic improvement of meat quality traits in cattle. No information is however available on the genetics of meat absorbance spectra. This research investigated the phenotypic variation and the heritability of meat absorbance spectra at individual wavelengths in the ultraviolet–visible and near-infrared region (UV–Vis-NIR) obtained with portable spectrometers. Five spectra per instrument were taken on the ribeye surface of 1185 Piemontese young bulls from 93 farms (13,182 Herd-Book pedigree relatives). Linear animal model analyses of 1481 single-wavelengths from UV–Vis-NIRS and 125 from Micro-NIRS were carried out separately. In the overlapping regions, the proportions of phenotypic variance explained by batch/date of slaughter (14 ± 6% and 17 ± 7%,), rearing farm (6 ± 2% and 5 ± 3%), and the residual variances (72 ± 10% and 72 ± 5%) were similar for the UV–Vis-NIRS and Micro-NIRS, but additive genetics (7 ± 2% and 4 ± 2%) and heritability (8.3 ± 2.3% vs 5.1 ± 0.6%) were greater with the Micro-NIRS. Heritability was much greater for the visible fraction (25.2 ± 11.4%), especially the violet, blue and green colors, than for the NIR fraction (5.0 ± 8.0%). These results allow a better understanding of the possibility of using the absorbance of visible and infrared wavelengths correlated with meat quality traits for the genetic improvement in beef cattle.
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