Photodynamic tumor therapy and on-line fluorescence spectroscopy after ALA administration using 633-nm light as therapeutic and fluorescence excitation radiation

1994 ◽  
Vol 33 (9) ◽  
pp. 2945 ◽  
Author(s):  
Alwin Kienle
Keyword(s):  
Fluorescence Spectroscopy ◽  
Tumor Therapy ◽  
Fluorescence Excitation ◽  
Excitation Radiation ◽  
On Line

A review on fluorescence spectroscopic analysis of water and wastewater

2021 ◽  
Author(s):  
Muhammad Farooq Saleem Khan ◽  
Mona Akbar ◽  
Jing Wu ◽  
Zhou Xu
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Fluorescence Spectroscopy ◽  
Quality Assessment ◽  
Online Monitoring ◽  
Water Quality Assessment ◽  
Fluorescence Measurement ◽  
Fluorescence Excitation ◽  
Water And Wastewater ◽  
Fluorescence Peak

Abstract In recent years, the application of fluorescence spectroscopy has been widely recognized in water environment studies. The sensitiveness, simplicity, and efficiency of fluorescence spectroscopy are proved to be a promising tool for effective monitoring of water and wastewater. The fluorescence excitation-emission matrix (EEMs) and synchronous fluorescence spectra have been widely used analysis techniques of fluorescence measurement. The presence of organic matter in water and wastewater defines the degree and type of pollution in water. The application of fluorescence spectroscopy to characterize dissolved organic matter (DOM) has made the water quality assessment simple and easy. With the recent advances in this technology, components of DOM are identified by employing parallel factor analysis (PARAFAC), a mathematical trilinear data modeling with EEMs. The majority of wastewater studies indicated that the fluorescence peak of EX/EM at 275nm/340nm is referred to tryptophan region (Peak T1). However, some researchers identified another fluorescence peak in the region of EX/EM at 225-237nm/340-381nm, which described the tryptophan region and labeled it as Peak T2. Generally, peak T is a protein-like component in the water sample, where T1 and T2 signals were derived from the <0.20µm fraction of pollution. Therefore, a more advanced approach, such as an online fluorescence spectrofluorometer, can be used for the online monitoring of water. The results of various waters studied by fluorescence spectroscopy indicate that changes in peak T intensity could be used for real-time wastewater quality assessment and process control of wastewater treatment works. Finally, due to its effective use in water quality assessment, the fluorescence technique is proved to be a surrogate online monitoring tool and early warning equipment.

scholarly journals Prospects of fluorescence methods application for monitoring of cyanobacterial cultures in biotechnology

2020 ◽  
Vol 23 ◽  
pp. 02007
Author(s):  
Natalia Yu. Grigoryeva ◽  
Anna A. Liss
Keyword(s):  
Growth Rate ◽  
Fluorescence Spectroscopy ◽  
Food Production ◽  
Physiological State ◽  
Biotechnological Applications ◽  
Wastewater Remediation ◽  
Fluorescence Techniques ◽  
Fluorescence Methods ◽  
On Line ◽  
Photosynthetic Microorganisms

Cyanobacteria are photosynthetic microorganisms that possess a high potential for innovative applications in agriculture, food production, cosmeticals, wastewater remediation, biofuels, antioxidative enzymes production, etc. During the industrial cultivation of cyanobacteria several parameters as growth rate, physiological state and algological purity of the culture should be controled permanently. One of the methods that can provide on-line monitoring of cyanobacterial cultures and further process automatization is a fluorescence spectroscopy. In this work several fluorescence techniques are analysed and their possible adaptation for biotechnological applications is suggested.

On-line in situ monitoring of the soybean oil and ethanol transesterification reaction by fluorescence spectroscopy

Fuel ◽  
2015 ◽  
Vol 145 ◽  
pp. 109-115 ◽  
Author(s):  
T. Izida ◽  
L. Bussler ◽  
J.R. Silva ◽  
L.H.C. Andrade ◽  
E. Simionatto ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Soybean Oil ◽  
Transesterification Reaction ◽  
In Situ Monitoring ◽  
On Line

scholarly journals On-line monitoring of organic matter concentrations and character in drinking water treatment systems using fluorescence spectroscopy

2016 ◽  
Vol 2 (4) ◽  
pp. 749-760 ◽  
Author(s):  
Y. Shutova ◽  
A. Baker ◽  
J. Bridgeman ◽  
R. K. Henderson
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Fluorescence Spectroscopy ◽  
Drinking Water Treatment ◽  
Robust Method ◽  
On Line

There is a need for a rapid and robust method of organic matter (OM) monitoring during drinking water treatment.

2-Dimensional fluorescence spectroscopy for on-line bioprocess monitoring

1998 ◽  
Vol 51 (1-3) ◽  
pp. 273-277 ◽  
Author(s):  
C Lindemann ◽  
S Marose ◽  
H.O Nielsen ◽  
T Scheper
Keyword(s):  
Fluorescence Spectroscopy ◽  
Bioprocess Monitoring ◽  
On Line

scholarly journals Comparison of fluorescence excitation modes for cdse semi-conductor quantum dots used in medical research

2018 ◽  
pp. 39-45
Author(s):  
Y. A. Kuzishchin ◽  
I. L. Martynov ◽  
E. V. Osipov ◽  
P. S. Samokhvalov ◽  
A. A. Chistyakov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fluorescence Spectroscopy ◽  
Medical Research ◽  
Simultaneous Detection ◽  
Mathematical Expression ◽  
Signal To Noise ◽  
Fluorescence Excitation ◽  
Accumulation Time ◽  
Fluorescent Tags ◽  
Signal Accumulation Time

Fluorescence spectroscopy is a powerful tool used in applied biological and medical research. Colloid semi-conductor quantum dots are promising fluorescent tags for simultaneous detection of different biopathogens. The techniques employing these tags can be improved by selecting the optimal modes for signal excitation and detection. The aim of the present work was to derive a mathematical expression to describe the signal-to-noise ratios in the pulsed and modulated excitation modes. Below, we compare these two modes of fluorescence excitation in ultralow quantities of quantum dots. We demonstrate that modulated excitation should be preferred for CdSe/ZnS quantum dots given that signal accumulation time is over 100 mc and the photosensor is exposed to background light of > 1 μW.

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