Monitoring organic loading to swimming pools by fluorescence excitation–emission matrix with parallel factor analysis (PARAFAC)

Abstract

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Assessing the potential impacts of declining Arctic sea ice cover on the photochemical degradation of dissolved organic matter in the Chukchi and Beaufort Seas

“…Components 1, 2, and 6 had spectra resembling humic‐like DOM, with broad emission spectra around and above 400 nm and a broader excitation spectra compared to the other components (Figure ). Components 1 and 2 exhibit characteristics of humic‐like terrestrially derived material [ Stedmon and Markager , , ; Stedmon et al , ; Kowalczuk et al , ; Yamashita et al , ; Jørgensen et al , ; Murphy et al , ; Seredynska‐Sobecka et al , ; Shutova et al , ; Tanaka et al , ]. Component 6 has also been identified as humic‐like [ Stedmon and Markager , ; Stedmon et al , ; Stedmon et al , ; Yamashita et al , ; Jørgensen et al , ], and Stedmon and Markager [] categorized it as marine derived or anthropogenic in nature.…”

Effects of calcium on the chromophores of dissolved organic matter and their interactions with copper

“…For instance, the carboxylic and phenolic moieties incorporated in NICA-Donnan or similar models can be estimated based on the behavior of DOM chromophores and fluorophores at varying metal concentrations, pHs and other system conditions (Korshin et al, 1997;Bai et al, 2008;Helms et al, 2008). Many prior studies examined effects of metal-DOM interactions on the fluorescence of DOM and correlated changes of the fluorescence intensity with the formation of DOM-metal complexes (Esteves da Silva et al, 1998;Ohno et al, 2008;Yamashita and Jaffe, 2008;Seredy nska-Sobecka et al, 2011;Wu et al, 2011). Despite the notable sensitivity of DOM fluorophores to complexation with Cu 2þ and selected other heavy metals, fluorophores represent only a small percentage of DOM functionalities potentially engaged in interactions with metal ions.…”

A novel time–frequency–space method with parallel factor theory for big data analysis in condition monitoring of complex system

“…18,19 Based on the theory of compressed sensing, a joint estimation of the angle and Doppler shift of a single-base multiple-input multiple-output (MIMO) radar based on the parallel analysis of compressed sensing was proposed. 20 In environmental monitoring, 3-D excitation-emission matrix fluorescence spectroscopy and PARAFAC was used to monitor organic pollution in swimming pools by Seredyńska et al 21 One hundred fifty-nine values given by gas phase chromatography and 9 sensory evaluations given by experts were obtained in the reaction of 11 amino acids and 6 reducing sugars. 22 For the two 3-D data arrays, the effects of various amino acids and sugars were analyzed by Tucker3 and PARAFAC methods, and the results of the two methods were compared.…”