Research on the Interaction between Biomaterials of Human Serum and Dibazol by Fluorescence Spectroscopy

2016 ◽  
Vol 723 ◽  
pp. 656-660
Author(s):  
Tian Hu Wang ◽  
Yin Sheng Luo
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescence Spectroscopy ◽  
Human Serum ◽  
Fluorescence Intensity ◽  
Light Wave ◽  
Light Wavelength ◽  
Peak Wavelength ◽  
Excitation Light ◽  
Vis Spectroscopy ◽  
Distribution In The Organism

The interaction of dibazol to serum was investigated by fluorescence and UV-vis spectroscopy. The fluorescence experiment results show that the fluorescence of human serum can be effectively induced by light wave. The maximum fluorescence intensity of serum is excited at 280 nm and the peak wavelength is about 334 nm. It can also be concluded that the fluorescence intensity gradually increase with the increasing excitation light wavelength. The range of the fluorescence spectroscopy of serum-dibazol system induced by excited at different wavelength is about 290 - 450 nm. The fluorescence intensity of the interaction system of dibazol-serum is significantly reduced, indicating that the fluorescence quenching of serum occurred strongly caused by dibazol and there is a new compound formed between dibazol and serum. The absorption spectra show that there is a large blue in the system of dibazol and serum, which reveal that there is a kind of new complex between dibazol and serum. It is very significance to study the interaction between dibazol and serum for understanding of drug’s toxicity and its distribution in the organism.

FLUORESCENCE CHANGE OF HUMAN SERUM ALBUMIN INDUCED BY METHYL VIOLET

2020 ◽  
Vol 54 (3 (253)) ◽  
pp. 261-264
Author(s):  
M.A. Shahinyan ◽  
N.H. Petrosyan ◽  
A.P. Antonyan
Keyword(s):  
Human Serum Albumin ◽  
Fluorescence Spectroscopy ◽  
Serum Albumin ◽  
Human Serum ◽  
Conformational Change ◽  
Fluorescence Intensity ◽  
Methyl Violet ◽  
Spectroscopy Method ◽  
Intensity Maximum ◽  
Fluorescence Change

The interaction of methyl violet (MV) with human serum albumin (HSA) has been studied, using the fluorescence spectroscopy method. It was shown that MV chnages the own fluorescence of HSA. It was also shown that MV does not induce any conformational change in the structure of HSA, since there is no change of the wavelength of HSA fluorescence intensity maximum. MV binds to HSA, near to fluorescing tryptophan, which in the hydrophilic environment, and changes the own fluorescence of the protein.

Suppression of motion artifacts in fluorescence spectroscopy of perfused hearts

1992 ◽  
Vol 263 (3) ◽  
pp. H972-H980 ◽  
Author(s):  
R. Brandes ◽  
V. M. Figueredo ◽  
S. A. Camacho ◽  
B. M. Massie ◽  
M. W. Weiner
Keyword(s):  
Fluorescence Spectroscopy ◽  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Motion Artifact ◽  
Motion Artifacts ◽  
Fluorescent Dye ◽  
Excitation Light ◽  
Reflected Light ◽  
Heart Motion ◽  
Perfused Hearts

Fluorescence spectroscopy of beating hearts has been used previously to measure intracellular regulators of function. Unfortunately, heart motion could introduce a spurious motion artifact (MA), influencing the measured fluorescence intensity (“signal”). To suppress MA, a ratio (or difference) has been calculated previously between the signal and an intensity reference detected at a different wavelength (“reference”). However, no studies have attempted to evaluate or optimize the efficiency of MA suppression. MA suppression was evaluated using reflected excitation light or fluorescence as reference. In addition, the MA contribution to the intensity ratio from a fluorescent dye, indo-1, was quantified. A reflected light reference resulted in poor suppression of MA. The use of a fluorescence reference resulted in suppression that was inversely related to the detection wavelength difference (delta) between the reference and signal. Therefore optimal MA suppression was obtained using a fluorescence reference at a wavelength close to the signal. For delta = 60 nm, MA was suppressed from approximately 10 to less than 2%. Finally, suppressed MA (delta = 60 nm) accounted for less than 10% of the indo-1 ratio fluctuations.

Comparative characterisation of two fulvic acids from East Lake and Liangzi Lake in central China

2015 ◽  
Vol 12 (2) ◽  
pp. 189 ◽  
Author(s):  
Jun Wang ◽  
Huijie Li ◽  
Yong Chen ◽  
Yuan Fang ◽  
Zongping Wang ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Cost Effective ◽  
Fulvic Acids ◽  
Central China ◽  
Anthropogenic Activity ◽  
Cost Effective Method ◽  
Vis Spectroscopy ◽  
East Lake ◽  
Ft Ir ◽  
Eem Fluorescence

Environmental context Fulvic acids account for a large proportion of dissolved organic matter in aquatic environments and affect the transportation and bioavailability of organic and inorganic pollutants. The structural and spectroscopic characteristics of fulvic acids mainly depend on the sources, seasons and anthropogenic activity. We present an advanced approach using fluorescence spectroscopy as a rapid and cost-effective method to investigate the composition, properties and origins of fulvic acids. Abstract Fulvic acids (FAs) isolated seasonally from the sediments of East Lake and Liangzi Lake in central China were comparatively investigated. The structural features of the FAs were characterised using chemical and spectroscopic methods, including elemental analysis, UV-Vis spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, and three-dimensional excitation emission matrix (EEM) fluorescence spectroscopy coupled with parallel factor analysis (PARAFAC). The O/C, (O+N)/C and C/N ratios of FA extracted from Liangzi Lake (FAL) were higher than those of FA extracted from East Lake (FAE), indicating higher oxygen-containing functionality and polarity and less nutrient in FAL compared with FAE. The two FAs had similar UV-Vis spectra with different absorbance intensities. The FT-IR spectra showed that the two FAs had similar functional groups. The total fluorescence intensity and aromaticity of samples from Liangzi Lake were higher than those of East Lake except for those taken in the summer. The two FAs were largely terrestrially derived organic materials. Five fluorescent components, including four humic-like and two fulvic-like components, were identified by PARAFAC modelling of the EEM spectral data. The fluorescence was dominated by two components. The findings suggest that EEM fluorescence spectroscopy together with PARAFAC is a rapid and cost-effective method for understanding the characteristics and origins of FAs in natural water systems.

scholarly journals Interaction between Alizarin and Human Serum Albumin by Fluorescence Spectroscopy

2011 ◽  
Vol 27 (1) ◽  
pp. 79-84 ◽  
Author(s):  
Feng GE ◽  
Lixiang JIANG ◽  
Diqiu LIU ◽  
Chaoyin CHEN
Keyword(s):  
Human Serum Albumin ◽  
Fluorescence Spectroscopy ◽  
Serum Albumin ◽  
Human Serum

scholarly journals Synthesis and Properties of Nitrogen-Doped Carbon Quantum Dots Using Lactic Acid as Carbon Source

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 466
Author(s):  
Kaixin Chang ◽  
Qianjin Zhu ◽  
Liyan Qi ◽  
Mingwei Guo ◽  
Woming Gao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lactic Acid ◽  
Fluorescence Quenching ◽  
Functional Groups ◽  
Fluorescence Intensity ◽  
Carbon Quantum Dots ◽  
Nitrogen Doped ◽  
Ph Values ◽  
Wide Range ◽  
Nitrogen Doped Carbon

Nitrogen-doped carbon quantum dots (N-CQDs) were synthesized in a one-step hydrothermal technique utilizing L-lactic acid as that of the source of carbon and ethylenediamine as that of the source of nitrogen, and were characterized using dynamic light scattering, X-ray photoelectron spectroscopy ultraviolet-visible spectrum, Fourier-transformed infrared spectrum, high-resolution transmission electron microscopy, and fluorescence spectrum. The generated N-CQDs have a spherical structure and overall diameters ranging from 1–4 nm, and their surface comprises specific functional groups such as amino, carboxyl, and hydroxyl, resulting in greater water solubility and fluorescence. The quantum yield of N-CQDs (being 46%) is significantly higher than that of the CQDs synthesized from other biomass in literatures. Its fluorescence intensity is dependent on the excitation wavelength, and N-CQDs release blue light at 365 nm under ultraviolet light. The pH values may impact the protonation of N-CQDs surface functional groups and lead to significant fluorescence quenching of N-CQDs. Therefore, the fluorescence intensity of N-CQDs is the highest at pH 7.0, but it decreases with pH as pH values being either more than or less than pH 7.0. The N-CQDs exhibit high sensitivity to Fe3+ ions, for Fe3+ ions would decrease the fluorescence intensity of N-CQDs by 99.6%, and the influence of Fe3+ ions on N-CQDs fluorescence quenching is slightly affected by other metal ions. Moreover, the fluorescence quenching efficiency of Fe3+ ions displays an obvious linear relationship to Fe3+ concentrations in a wide range of concentrations (up to 200 µM) and with a detection limit of 1.89 µM. Therefore, the generated N-CQDs may be utilized as a robust fluorescence sensor for detecting pH and Fe3+ ions.

Sign in / Sign up

Export Citation Format

Share Document