Generation of Reactive Oxygen Species and Photon Emission from a Browned Product

Iida, Tetsuo; Yoshiki, Yumiko; Someya, Shinich; Okubo, Kimihiro

doi:10.1271/bbb.66.1641

Cited by 9 publications

(3 citation statements)

References 12 publications

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“…Second, a method employing spectroscopic detection of the reduced Cu + complex that formed after the reduction of Cu 2+ by the antioxidants (PAO assay) (de Martino et al ., ) was applied. To measure the radical and reactive oxygen scavenging capacity, a 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) assay, the third method, and a chemiluminescence system (XYZ system) (Yoshiki et al ., ; Iida et al ., ), the forth method, were used.…”

Section: Introductionmentioning

confidence: 99%

Anthocyanin content and antioxidant capacity in bran extracts of some Thai black rice varieties

Pitija

Nakornriab

Sriseadka

et al. 2012

Int J of Food Sci Tech

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Summary This study investigated both the anthocyanin content and the antioxidant capacity of a set of genetically related glutinous and nonglutinous Thai black rice varieties. The ethanol/water extracts of the brans of these black rice varieties showed relatively potent antioxidant activities compared with those of tocopherol. These antioxidant activities were determined by thiocyanate, H2O2‐scavenging chemiluminescence (XYZ), Cu++/bathocuproine colorimetry (PAO) and 1,1‐diphenyl‐2‐picrylhydrazyl radical‐scavenging assay. The structural identification and quantification of the black rice anthocyanins performed by high‐performance liquid chromatography coupled with electrospray ionisation and tandem mass spectrometry found cyanidin‐3‐O‐glucoside and peonidin‐3‐O‐glucoside as the major anthocyanins in the ranges of 16.01–34.40 and 2.43–7.36 μg mL−1, respectively. The comparative study in terms of quantity of these phytochemicals and antioxidant capacity of the black rice bran extracts suggested the contribution of overall phenolic components rather than that of the particular anthocyanin pigments.

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Section: Introductionmentioning

confidence: 99%

Anthocyanin content and antioxidant capacity in bran extracts of some Thai black rice varieties

Pitija

Nakornriab

Sriseadka

et al. 2012

Int J of Food Sci Tech

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“…Besides quantum technologies, COSPLI may find applications in exploring some new region of ultra-weak signals [40], like agriculture [41], food chemistry [42] and biomedicine [43]. For example, it has been reported that neuronal activity has correlation with ultra-weak photon emission (UPE).…”

Section: Iccdmentioning

confidence: 99%

Mapping and measuring large-scale photonic correlation with single-photon imaging

Sun

Gao

Cao

et al. 2019

Optica

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Quantum correlation and its measurement are essential in exploring fundamental quantum physics problems and developing quantum enhanced technologies. Quantum correlation may be generated and manipulated in different spaces, which demands different measurement approaches corresponding to position, time, frequency and polarization of quantum particles. In addition, after early proof-of-principle demonstrations, it is of great demand to measure quantum correlation in a Hilbert space large enough for real quantum applications. When the number of modes goes up to several hundreds, it becomes economically unfeasible for single-mode addressing and also extremely challenging for processing correlation events with hardware. Here we present a general and large-scale measurement approach of Correlation on Spatially-mapped Photon-Level Image (COSPLI). The quantum correlations in other spaces are mapped into the position space and are captured by single-photon-sensitive imaging system. Synthetic methods are developed to suppress noises so that single-photon registrations can be faithfully identified in images. We eventually succeed in retrieving all the correlations with big-data technique from tens of millions of images. We demonstrate our COSPLI by measuring the joint spectrum of parametric down-conversion photons. Our approach provides an elegant way to observe the evolution results of large-scale quantum systems, representing an innovative and powerful tool added into the platform for boosting quantum information processing.Quantum correlation, as one of the unique features of quantum theory, plays a crucial role in quantum information applications. After experiencing quantum evolutions, e.g. quantum interference, quantum particles can be correlated in more diverse ways than the classical counterpart. For example, Hong-Ou-Mandel (HOM) interference can reveal the nonclassical bunching properties of photons [1]. These correlation characteristics are crucial in quantum computing [2][3][4][5], quantum simulation[6-9] and quantum communication [10][11][12][13].In theory, especially in the field of quantum computing, if we manage to send enough entangled photons into plenty of modes and operate their superposition states simultaneously, we would be able to obtain sufficiently large quantum state space that may enable a higher computational power than classical computers. In practice, it may still be acceptable to place single photon detector behind each spatial mode for comparably small systems [9, 14-16]. However, it will become both technically challenging and economically unfeasible to address thousands of modes simultaneously with single photon detectors, and therefore become a decisive bottleneck preventing from detecting state spaces large enough for real quantum applications.Thankfully, recent advances of charge-coupled device (CCD) cameras make it possible to directly image spatial output results at a single-photon level [17][18][19][20][21][22][23][24]. HOM interference was also successfully verified by low-noise corre...

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“…Evidence clearly indicates that photon emissions from rice cells elicited by N-acetylchitosaccharide are closely associated with generation of ROS, together with regulation by Ca signaling and protein phosphorylation (21). Prior reports relate phosphates to bioelectrostatic involvement (3), ROS to cell signaling (22), and biophotons to ROS (23,24).…”

Section: Metal Ions: Cell Signaling Electron Transfer Ros Oxidativmentioning

confidence: 99%

Unifying Electrostatic Mechanism for Metal Cations in Receptors and Cell Signaling

Kovacic

2008

Journal of Receptors and Signal Transduction

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Previously, an electrostatic mechanism was proposed for receptor-ligand action and for cell signaling by phosphate and sulfate. The hypothesis is further elaborated by application to metal ions, mainly calcium, magnesium, zinc, iron, and copper, in receptors and cell signaling. Evidence is provided for involvement of electrostatics in various reaction modes in biosystems. Calcium plays an important role electrochemically in neurotransmission. In some cases, electron transfer and redox processes are also involved. Electrostatics are known to participate in plant biochemistry. Mechanistically, the electrostatic field may act as a conduit for electrons and radicals and in involvement with energetics.

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Generation of Reactive Oxygen Species and Photon Emission from a Browned Product

Cited by 9 publications

References 12 publications

Anthocyanin content and antioxidant capacity in bran extracts of some Thai black rice varieties

Anthocyanin content and antioxidant capacity in bran extracts of some Thai black rice varieties

Mapping and measuring large-scale photonic correlation with single-photon imaging

Unifying Electrostatic Mechanism for Metal Cations in Receptors and Cell Signaling

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