Rapid Detection of <i>Aspergillus flavus</i> Contamination in Peanut with Novel Delayed Luminescence Spectra

Chen, Wenli; Xing, Da; Chen, WeiGui

doi:10.1562/2005-05-23-rc-538

Cited by 15 publications

(10 citation statements)

References 16 publications

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“…[20][21][22][23][24][25] On the other hand, a major experimental issue in DL spectroscopy is represented by the detection of ultra-weak light signals, specially when they come from reduced sample quantities. This can be the case for DL photo-induced on a single seed, requiring higher detection sensitivity with respect to most of present-day equipment.…”

Section: Introductionmentioning

confidence: 99%

Time‐resolved spectral measurements of delayed luminescence from a single soybean seed: effects of thermal damage and correlation with germination performance

et al. 2009

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Delayed luminescence from a single dry soybean seed was investigated in both spectral and time domains, under different excitation wavelengths. Emission spectra were collected, under 337 nm laser excitation, from native and artificially deteriorated seeds and the time-dependence of different spectral components was analyzed in detail. The single seed viability was evaluated through observation of germination properties after imbibition and compared with different parameters related to the luminescence kinetics. The significant correlation found between single seed delayed luminescence parameters and germination capability strongly validates the connection of this phenomenon with the functional state of the system and suggests the development of a non-invasive technique for seed quality determination.

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Section: Introductionmentioning

confidence: 99%

Time‐resolved spectral measurements of delayed luminescence from a single soybean seed: effects of thermal damage and correlation with germination performance

et al. 2009

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“…In this regard, some studies have found correlations between DL signals and color of tomato fruits at different maturity stages [ 14 ], as well as between DL intensity and fungal contamination level in peanuts artificially inoculated with A . flavus [ 44 ]. As previously reported, DL measurements were able to differentiate medicinal herbs prepared under different conditions and showing different age and therapeutic properties (these characteristics reflect the presence of different active chemical compounds) [ 21 , 22 , 40 ].…”

Section: Discussionmentioning

confidence: 99%

Applications of Delayed Luminescence for tomato fruit quality assessment across varied Sicilian cultivation zones

Panebianco

Wijk²,

Yan³

et al. 2023

PLoS ONE

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The food industry places significant emphasis on ensuring quality and traceability as key components of a healthy diet. To cater to consumer demands, researchers have prioritized the development of analytical techniques that can rapidly and non-invasively provide data on quality parameters. In this study, we propose to use the Delayed Luminescence (DL), an ultra-weak and photo-induced emission of optical photons, as a tool for a rapid evaluation of quality profile associated with fruit ripening, in support of traditional analysis methods. Delayed Luminescence measurements have been performed on cherry tomatoes, with and without the PGI “Pomodoro di Pachino” certification, harvested from two different growing areas of south-eastern Sicily (Italy). Then, DL emissions were correlated with soluble solid content and titratable acidity values, which are known to affect the flavor, the commerciality and the maturity degree of tomato fruits. In addition, we evaluated the changes in the DL parameters with respect to the geographical origin of the cherry tomatoes, with the aim of testing the possibility of applying the technique for identification purposes. The signals of Delayed Luminescence appeared to be good indicators of the macromolecular structure of the biological system, revealing structural changes related to the content of total soluble solids present in the juice of tomatoes analyzed, and they appeared unsuitable for authenticating vegetable crops, since the differences in the photon yields emitted by tomato Lots were not related to territory of origin. Thus, our results suggest that DL can be used as a nondestructive indicator of important parameters linked to tomato fruit quality.

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“…Delayed luminescence (DL) was developed as a rapid, direct, systemic tool to measure the decaying ultra-weak luminescence (up to seconds or minutes) exhibited by materials after being illuminated with light. As a sample loss-free technique, DL is a sensitive approach and widely applied in determining food quality [15], seed germination [16] and cancerous cells [17]. DL is a photo-induced ultra-weak photon emission [18], of which the properties are influenced by molecular structures and interactions [19], in particular the long chain molecules [20,21].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of aged and contemporary Chinese herbal materials by using delayed luminescence technique

et al. 2020

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Background: Investigation of aged Chinese herbal materials will help us to understand their use and sources in ancient time and broaden the historical perspective of Chinese material medica. To reach this aim, the basic understanding of aged herbal materials, including physical and chemical characters, is of great importance. Delayed luminescence (DL) technique was developed as a rapid, direct, systemic, objective and sample loss-free tool to characterize the properties of Chinese herbal materials. In this study, we measured DL values in aged Chinese herbal materials that were transported from Asia to Europe during the 20th century and stored in Naturalis Biodiversity Center and the Utrecht University museum, and compared these with modern material of the same species. Methods: A hyperbolic function was used to extract four properties from the DL curves of Chinese herbal material from 1900, the 1950s and recently harvested products. Statistical tools, including the Student's t test, One-way analysis of variance and Principal Component Analysis, were used to differentiate the DL properties of aged and contemporary collections of Glycyrrhiza spp. Curcuma aromatica Salisb., Zingiber officinale Roscoe, Alpinia officinarum Hance and Acorus calamus L. Results: Our results showed that DL properties were significantly different between historical and contemporary Chinese herbal materials. Changes in DL values were species-dependent: the effects of storage time of DL properties were specific for each species. These outcomes help us not only in the identification of historical Chinese medicine products but also provides valuable data of the effect of storage time on herbal materials. Conclusion: The simple, direct, rapid, and inexpensive measurements offered by DL provide a novel tool to assess the taxonomic identity of Chinese and other herbal materials and assess the differences in chemical properties with increasing storage time. Our results contribute to the further development of novel digital tools for the quality control of herbal materials.

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Rapid Detection of Aspergillus flavus Contamination in Peanut with Novel Delayed Luminescence Spectra

Cited by 15 publications

References 16 publications

Time‐resolved spectral measurements of delayed luminescence from a single soybean seed: effects of thermal damage and correlation with germination performance

Time‐resolved spectral measurements of delayed luminescence from a single soybean seed: effects of thermal damage and correlation with germination performance

Applications of Delayed Luminescence for tomato fruit quality assessment across varied Sicilian cultivation zones

A comparative study of aged and contemporary Chinese herbal materials by using delayed luminescence technique

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