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A chemometric analysis on the fluorescent dissolved organic matter in a full-scale sequencing batch reactor

Chen Qian, Wei Chen, Wei-Hua Li, Han-Qing Yu

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 4, doi: 10.1007/s11783-017-0962-2

Abstract: Fluorescence excitation-emission matrix (EEM) in combination with parallel factor analysis (PARAFAC)

Keywords： Wastewater treatment plants (WWTPs)     Excitation-emission matrix (EEM)     Parallel factor (PARAFAC)     Parallel    

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Investigation of fluorescence characterization and electrochemical behavior on the catalysts of nanosized Pt-Rh/γ-Al

Chang-Mao HUNG, Wen-Liang LAI, Jane-Li LIN

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 428-434 doi: 10.1007/s11783-013-0517-0

Abstract: catalysts were thoroughly measured using transmission electron microscopy (TEM), three-dimensional excitation-emissionfluorescent matrix (EEFM) spectroscopy, UV-Vis absorption, dynamic light-scattering (DLS), zeta potentialOne fluorescent peak for fresh catalyst was different with that of exhausted catalyst.spectroscopy was proven to be an appropriate and effective method to characterize the Pt clusters in intrinsic emission

Keywords： ammonia (NH3)     nanosized Pt-Rh/γ-Al2O3 catalyst     excitation-emission fluorescent    

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Identification of sources, characteristics and photochemical transformations of dissolved organic matter with EEM-PARAFAC in the Wei River of China

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1340-z

Abstract:

• The source of DOM in surface water and sediment is inconsistent.

Keywords： Dissolved organic matter     Parallel factor analysis     Excitation-emission matrices     Photodegradation    

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Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in

Jinlan Yu, Kang Xiao, Wenchao Xue, Yue-xiao Shen, Jihua Tan, Shuai Liang, Yanfen Wang, Xia Huang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 2, doi: 10.1007/s11783-019-1210-8

Abstract: Three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy, a powerful tool forfluorescence peak location/intensity, wavelength regional distribution, and spectral deconvolution (giving fluorescentIn addition to conventional EEM indicators, novel fluorescent parameters are summarized for potential

Keywords： excitation-emission matrix (EEM)     dissolved organic matter (DOM)     membrane bioreactor (MBR)     fluorescence    

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Information gathering and processing with fluorescent molecules

Brian DALY,Jue LING,A. Prasanna de SILVA

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 240-251 doi: 10.1007/s11705-014-1432-z

Abstract: Molecular information gathering and processing — a young field of applied chemistry — is undergoing good growth. The progress is occurring both in terms of conceptual development and in terms of the strengthening of older concepts with new examples. This review critically surveys these two broad avenues. We consider some cases where molecules emulate one of the building blocks of electronic logic gates. We then examine molecular emulation of various Boolean logic gates carrying one, two or three inputs. Some single-input gates are popular information gathering devices. Special systems, such as ‘lab-on-a-molecule’ and molecular keypad locks, also receive attention. A situation deviating from the Boolean blueprint is also discussed. Some pointers are offered for maintaining the upward curve of the field.

Keywords： molecular logic     molecular computation     molecular sensor     fluorescent molecular device     fluorescent sensor    

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Chemical identification and genotoxicity analysis of petrochemical industrial wastewater

Jing ZHANG, Shigong WANG, Can WANG, Hongying HU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 3,   Pages 350-359 doi: 10.1007/s11783-012-0404-0

Abstract: The actual harmful effects of industrial wastewater can not be reflected by the conventional water quality index. Therefore, the change in dissolved organic matter and the genetic toxicity of petrochemical wastewater were observed in the current study by examining the wastewater treatment plant of a large petrochemical enterprise in Northwest China. Using XAD-8, MSC, and DA-7 resins, the wastewater was separated into six fractions, namely, hydrophobic acid (HOA), hydrophobic neutral (HOB), hydrophobic alkaline, hydrophilic acid, hydrophilic alkaline, and hydrophilic neutral. Umu-test was used to detect the genetic toxicity of the wastewater samples, and fluorescence spectra were also obtained to examine genetic toxic substances. The results show that wastewater treatment facilities can effectively reduce the concentration of organic matter in petrochemical wastewater ( <0.05). However, the mixing of aniline wastewater can increase the amount of organic carbon ( <0.05) and can overload facilities. This finding shows that the mixed collection and joint treatment of different types of petrochemical wastewater can affect the water quality of the effluent. Particularly, hydrophobic substances can be difficult to remove and account for a relatively large proportion of the effluent. The mixture of aniline wastewater can increase the genetic toxicity of the effluent ( <0.05), and biologic treatment can not effectively decrease the toxicity. Most of the genetic toxicology may exist in the HOA and HOB fractions. Fluorescence spectroscopy also confirms this result, and tryptophan-like substances may play an important role in genetic toxicity.

Keywords： dissolved organic matter     resin fraction     genetic toxicity     fluorescence excitation and emission matrix    

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Approximation of structural damping and input excitation force

Mohammad SALAVATI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 244-254 doi: 10.1007/s11709-016-0371-9

Abstract: Structural dynamic characteristics are the most significant parameters that play a decisive role in structural damage assessment. The more sensitive parameter to the damage is the damping behavior of the structure. The complexity of structural damping mechanisms has made this parameter to be one of the ongoing research topics. Despite all the difficulties in the modeling of damping, there are some approaches like as linear and nonlinear models which are described as the energy dissipation throughout viscous, material or structural hysteretic and frictional damping mechanisms. In the presence of a mathematical model of the damping mechanisms, it is possible to estimate the damping ratio from the theoretical comparison of the damped and un-damped systems. On the other hand, solving the inverse problem of the input force estimation and its distribution to each SDOFs, from the measured structural responses plays an important role in structural identification process. In this paper model-based damping approximation method and a model-less structural input estimation are considered. The effectiveness of proposed methods has been carried out through analytical and numerical simulation of the lumped mass system and the results are compared with reference data. Consequently, high convergence of the comparison results illustrates the satisfactory of proposed approximation methods.

Keywords： structural modal parameters     damping identification method     input excitation force identification     Inverse    

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Recent advances of small-molecule fluorescent probes for detecting biological hydrogen sulfide

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1,   Pages 34-63 doi: 10.1007/s11705-021-2050-1

Abstract: has realized the study of H2S in subcellular organelles, facilitated by the development of fluorescent

Keywords： hydrogen sulfide     fluorescent probe     reducibility     nucleophilicity     copper sulfide precipitate     hydrogen    

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Fluorescent properties and

Hong GAO,Jie SONG,Shibin SHANG,Zhanqian SONG

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 1,   Pages 106-115 doi: 10.15302/J-FASE-2017133

Abstract: series of dehydroabietic acid-based diarylamines have been synthesized in order to investigate their fluorescentmolecular geometry, HOMO and LUMO energies, and energy gaps are important to predict absorption and fluorescentcarcinoma SMMC-7721, human gastric cancer SGC-7901 and human lung adenocarcinoma A549 cells and strong blue fluorescentThese compounds are potential candidates for fluorescent probes in biological diagnosis.

Keywords： dehydroabietic acid-based diarylamine     DFT study     fluorescent probe     in vitro imaging    

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A novel flavonol-based colorimetric and turn-on fluorescent probe for rapid determination of hydrazine

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 24-33 doi: 10.1007/s11705-022-2171-1

Abstract: Herein, a novel fluorescent probe 4-oxo-2-styryl-4H-chromen-3-yl thiophene-2-carboxylate (FHTstrips were able to conveniently detect hydrazine of low concentration through distinct naked-eye and fluorescent

Keywords： cinnamaldehyde     3-hydroxychromone derivative     hydrazine     fluorescent probe    

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Novel lysosome-targeted anticancer fluorescent agents used in zebrafish and nude mouse tumour imaging

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1,   Pages 112-120 doi: 10.1007/s11705-021-2075-5

Abstract: both reporting and imaging agents in vitro and in vivo without the need to add other fluorescent

Keywords： fluorescent drug     lysosomal     anticancer     zebrafish     nude-mouse tumour imaging    

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Fluorescent probes and functional materials for biomedical applications

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10,   Pages 1425-1437 doi: 10.1007/s11705-022-2163-1

Abstract: Due to their simplicity in preparation, sensitivity and selectivity, fluorescent probes have become theIn addition, many long-wavelength fluorescent probes developed have also proven applicable for inHere, we highlight examples of fluorescent probes and functional materials for biological applicationsselected from the special issues “Fluorescent Probes” and “Molecular Sensors and Logic Gates” recently

Keywords： fluorescent probes     imaging     cell     biomedicine     biomolecules    

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A highly selective fluorescent probe for real-time imaging of UDP-glucuronosyltransferase 1A8 in living

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1,   Pages 103-111 doi: 10.1007/s11705-021-2064-8

Abstract: Here, a novel fluorescent probe BDMP was developed based on boron-dipyrromethene (BODIPY) with high sensitivityThe glucuronidation of BDMP not only exhibited a red-emission wavelength (λex/λ<

Keywords： UDP-glucuronosyltransferase 1A8     fluorescent probe     subtype selectivity     fluorescence imaging    

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Special issue on “Fluorescent probes”

Adam C. Sedgwick, Tony D. James

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 1-3 doi: 10.1007/s11705-019-1910-4

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Interactions between metal ions and the biopolymer in activated sludge: quantification and effects of system pH value

Yun Zhou, Siqing Xia, Binh T. Nguyen, Min Long, Jiao Zhang, Zhiqiang Zhang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 1, doi: 10.1007/s11783-017-0898-6

Abstract: The biopolymer showed two protein-like fluorescence peaks (peaks A and B). Interactions of Pb(II) and biopolymer were quantified at various system pH values. System pH values significantly affect the quenching constant values for both peaks. Peak B plays a more important role in the interactions than peak A. Removal mechanism of metal ions by activated sludge system was further disclosed. The quantification and effects of system pH value on the interactions between Pb(II) and the biopolymer from activated sludge were investigated. The biopolymer had two protein-like fluorescence peaks (Ex/Em= 280 nm/326–338 nm for peak A; Ex/Em= 220–230 nm/324–338 nm for peak B). The fluorescence intensities of peak B were higher than those of peak A. The fluorophores of both peaks could be largely quenched by Pb(II), and the quencher dose for peak B was about half of that for peak A. The modified Stern-Volmer equation well depicted the fluorescence quenching titration. The quenching constant (Ka) values for both peaks decreased with rising system pH value, and then sharply decreased under alkaline conditions. It could be attributed to that the alkaline conditions caused the reduction of available Pb(II) due to the occurrence of Pb(OH)2 sediments. The Ka values of peak B were bigger than those for peak A at the same system pH values. Accordingly, the aromatic protein (peak B) plays the key role in the interactions between metal ions and the biopolymer.

Keywords： Metal ions     Biopolymer     Activated sludge     Three-dimensional excitation emission matrix (3D-EEM)     Fluorescence    

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Title Author Date Type Operation

A chemometric analysis on the fluorescent dissolved organic matter in a full-scale sequencing batch reactor

Chen Qian, Wei Chen, Wei-Hua Li, Han-Qing Yu

Journal Article

Investigation of fluorescence characterization and electrochemical behavior on the catalysts of nanosized Pt-Rh/γ-Al

Chang-Mao HUNG, Wen-Liang LAI, Jane-Li LIN

Journal Article

Identification of sources, characteristics and photochemical transformations of dissolved organic matter with EEM-PARAFAC in the Wei River of China

Journal Article

Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in

Jinlan Yu, Kang Xiao, Wenchao Xue, Yue-xiao Shen, Jihua Tan, Shuai Liang, Yanfen Wang, Xia Huang

Journal Article

Information gathering and processing with fluorescent molecules

Brian DALY,Jue LING,A. Prasanna de SILVA

Journal Article

Chemical identification and genotoxicity analysis of petrochemical industrial wastewater

Jing ZHANG, Shigong WANG, Can WANG, Hongying HU

Journal Article

Approximation of structural damping and input excitation force

Mohammad SALAVATI

Journal Article

Recent advances of small-molecule fluorescent probes for detecting biological hydrogen sulfide

Journal Article

Fluorescent properties and

Hong GAO,Jie SONG,Shibin SHANG,Zhanqian SONG

Journal Article

A novel flavonol-based colorimetric and turn-on fluorescent probe for rapid determination of hydrazine

Journal Article

Novel lysosome-targeted anticancer fluorescent agents used in zebrafish and nude mouse tumour imaging

Journal Article

Fluorescent probes and functional materials for biomedical applications

Journal Article

A highly selective fluorescent probe for real-time imaging of UDP-glucuronosyltransferase 1A8 in living

Journal Article

Special issue on “Fluorescent probes”

Adam C. Sedgwick, Tony D. James

Journal Article

Interactions between metal ions and the biopolymer in activated sludge: quantification and effects of system pH value

Yun Zhou, Siqing Xia, Binh T. Nguyen, Min Long, Jiao Zhang, Zhiqiang Zhang

Journal Article