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Luminescence: the Journal of Biological and Chemical Luminescence

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https://www.readbyqxmd.com/read/28636187/dual-labeled-chemiluminescence-enzyme-immunoassay-for-simultaneous-measurement-of-total-prostate-specific-antigen-tpsa-and-free-prostate-specific-antigen-fpsa
#1
Lixia Zhao, Dan Wang, Gen Shi, Ling Lin
The specificity for early diagnostic of prostate-specific antigen (PSA) is low because the current technology mostly allows the detection of only one biomarker at one time. In this work, a dual-labeled chemiluminescence enzyme immunoassay (CLEIA) for simultaneous measurement of total PSA (TPSA) and free PSA (FPSA) was proposed. Anti-PSA McAb (Mab1) was immobilized on a microplate as the solid phase, horseradish peroxidase (HRP)-labeled anti-TPSA monoclonal antibody (McAb2) and alkaline phosphatase (ALP)-labeled anti-FPSA McAb3 were used as detection antibodies...
June 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28636112/fluorescent-carbon-nanoparticles-obtained-from-charcoal-via-green-methods-and-their-application-for-sensing-fe-3-in-an-aqueous-medium
#2
Rajesh Patidar, Babulal Rebary, Dhruti A Sanghani, Gopala Ram Bhadu, Parimal Paul
Two green methods (microwave and hydrothermal) were employed for the preparation of water dispersible fluorescent carbon nanoparticles (CNPs) from activated charcoal. Microwave and hydrothermally synthesized carbon nanoparticles, (MW-CNPs) and (HT-CNPs), respectively were characterized by microscopic and spectroscopic techniques. A detailed study of their fluorescence characteristics was made. MW-CNPs and HT-CNPs were tested for metal ion selectivity in aqueous medium. MW-CNPs showed selectivity for Fe(3+) among the tested metal ions and important studies such as for interference, linear range and limit of detection were carried out...
June 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28635101/a-simply-synthesized-biphenyl-substituted-piperidin-4-one-for-the-fluorescence-chemosensing-of-cd-2
#3
Sumathi Poomalai, Anju Kannan Padinjareveetil, Sivaraj Ramasamy, Tamil Selvan Govindaraj, Mosae Selvakumar Paulraj, Israel Vijayaraj Muthu Vijayan Enoch
Ion-induced change in fluorescence is a straight-forward method for detection of toxic metal ions showing immediate response. Cadmium ions are toxic to the environment. We report in this paper a piperidine-4-one-based fluorescent chemosensor of Cd(2+) ions, designed and synthesized by a simple method. The compound is characterized using infra-red (IR) and (1) H-NMR spectral techniques. The chemosensor showed Cd(2+) ion selectivity and sensitivity in aqueous solution. The stoichiometry and the binding constants were determined using fluorescence spectroscopy...
June 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28631299/carbazole-azine-based-fluorescence-off-on-sensor-for-selective-detection-of-cu-2-and-its-live-cell-imaging
#4
Denzil Britto Christopher Leslee, Sekar Karuppannan, Karmegam Muthu Vengaian, Sivaraman Gandhi, Singaravadivel Subramanian
A new carbazole-azine based fluorescent sensor was synthesized and characterized. The selectivity of the sensor for Cu(2+) over other counter ions in a dimethyl sulfoxide/H2 O mixture was shown through enhancement in fluorescence - an off to on transformation. The specificity of the probe towards Cu(2+) was evident in ultraviolet/visible, fluorescence, Fourier transform infrared and mass studies. Application of the probe in the cell imaging and cytotoxicity of living cells is illustrated.
June 20, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28612423/chemiluminescence-selectivity-enhancement-in-the-on-chip-ru-bpy-3-2-system-the-potential-role-of-buffer-type-and-ph-in-the-determination-of-hydrochlorothiazide-in-combined-formulations-and-human-plasma
#5
Afsal Mohammed Kadavilpparampu, Haider A J Al Lawati, Fakhr Eldin O Suliman
A simple and highly selective on-chip Ru(bpy)3(2+) -oxidant chemiluminescence (CL) approach for estimation of a diuretic drug, hydrochlorothiazide (HCZ), in biological fluids was realized in the presence of other fixed-dose combination drugs by manipulating simultaneously the method of active species (Ru(bpy)3(3+) ) production and type of carrier buffer with pH used for the CL reaction. Chemical oxidation processes involved in the Ru(bpy)3(2+) -Ce(IV) CL system have been successfully miniaturised in this study using a microfabricated device to generate Ru(bpy)3(3+) instantaneously...
June 14, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28612410/structural-and-luminescent-studies-of-erbium-doped-cazro3-green-emitting-nanophosphors
#6
Evangeline Ballem, Abdul Azeem, Prasada Rao Rayavarapu, Haranath Divi
Erbium (Er) (0.5, 1.0 and 1.5 wt%)-doped CaZrO3 nanophosphors were synthesized by the sol-gel method using poly(vinyl alcohol) as the chelating agent. Their structural and photoluminescence properties were studied using X-ray diffraction (XRD), field emission scanning electron microscopy-energy dispersive spectroscopy (FESEM-EDS), transmission electron microscopy (TEM), photoluminescence and Fourier transform infrared spectroscopy (FTIR). The XRD patterns of the samples confirm that nanoscale crystallite sizes...
June 14, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28612390/spectral-investigations-on-eu-3-sm-3-doped-and-sm-3-eu-3-co-doped-potassium-fluoro-phosphate-glass-emitting-intense-orange-red-for-lighting-applications
#7
Kapuluri Anil Kumar, Singarapu Babu, Vasanthapalli Reddy Prasad, Samadam Damodaraiah, Yadala Chenchu Ratnakaram
Potassium fluoro-phosphate (KFP) glass singly doped with different concentrations of europium (Eu(3+) ) or samarium (Sm(3+) ) or co-doped (Sm(3+) /Eu(3+) ) was prepared, and their luminescence spectra were investigated. The phase composition of the product was verified by X-ray diffraction analysis. Optical transition properties of Eu(3+) in the studied potassium phosphate glass were evaluated in the framework of the Judd-Ofelt theory. The radiative transition rates (AR ), fluorescence branching ratios (β), stimulated emission cross-sections (σe ) and lifetimes (τexp ) for certain transitions or levels were evaluated...
June 14, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28612387/photoluminescence-cathodoluminescence-and-thermal-stability-of-sm-3-activated-sr3-la-vo4-3-red-emitting-phosphors
#8
Peng Du, Jae Su Yu
A series of Sm(3+) -activated Sr3 La(VO4 )3 phosphors were synthesized by a facile sol-gel method. X-ray diffraction patterns and photoluminescence (PL)/cathodoluminescence (CL) spectra as well as PL decay curves were employed to characterize the obtained samples. Upon 402 nm light excitation, the characteristic emissions of Sm(3+) ions corresponding to (4) G5/2 →(6) HJ transitions were observed in all the as-prepared products. The PL emission intensity was increased with increase in Sm(3+) ion concentration, while concentration quenching occurred when the doping concentration was over 4 mol%...
June 14, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28612369/spectroscopic-and-molecular-docking-study-on-the-structure-affinity-relationship-and-mechanism-in-the-interaction-of-genistein-and-its-derivatives-with-bovine-serum-albumin
#9
Yu Guo, Lixian Shen, Xu Yao, Yang Liu, Yunmei Liu, Hongfei Chen, Ke Min, Xing Zheng
In this paper, the interaction of genistein (GEN) and its four derivatives (GEN1-4) with bovine serum albumin (BSA) were investigated by ultraviolet-visible absorption spectra, fluorescence, synchronous fluorescence, three-dimensional fluorescence spectroscopy, circular dichroism and molecular docking techniques. The experimental results showed that the intrinsic fluorescence of BSA was quenched by genisteins and was due to the formation of a genisteins-BSA complex. The quenching constant, binding constants, binding sites, intermolecular distances and thermodynamic properties were calculated at 298 K, 306 K and 310 K...
June 14, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28590051/a-tricorn-rhodamine-fluorescent-chemosensor-for-detection-of-co-2-ions
#10
Jing Li, Shuhua Han
A novel chemosensor TrisRh based on tris(2-aminoethyl)amine and rhodamine 6G is designed and synthesized as a fluorescence turn-on probe for Co(2+) ions that is paramagnetic with a property of quenching fluorescence. Rhodamine spirolactam forms are nonfluorescent, whereas, ring-opening of corresponding spirocyclic induced by Co(2+) results in strong fluorescence emission. Upon the addition of Co(2+) ions, TrisRh can display significant enhancements in absorbance and fluorescence intensity as well as evident colorific transformation, which can be perceived by the naked eye...
June 7, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28590050/a-switch-off-fluorescence-probe-towards-pb-ii-and-cu-ii-ions-based-on-a-calix-4-pyrrole-bearing-amino-quinoline-group
#11
Keyur D Bhatt, Hemangini D Shah, Manthan Panchal
A new fluorescence receptor calix[4]pyrrole-N-(quinoline-8-yl) acetamide (CAMQ) containing a pyrrolic ring connected via the meso-position was synthesized, purified and characterized by elemental analysis, NMR and mass spectroscopy. This compound was examined for its fluorescence properties towards different metal ions e.g. Ag(I), Hg(II), Co(II), Ca(II), Ni(II), Zn(II), Cr(II), Ba(II), Fe(II), Cu(II), Pb(II)and Mg(II) ions by spectrophotometry and spectrofluorometry. It was concluded that the compound (CAMQ) possessed significantly enhanced selectivity for Pb(II) and Cu(II) ions in dimethyl sulfoxide (DMSO) even at very low concentrations (1 μM)...
June 7, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28590030/resonance-rayleigh-scattering-methods-for-the-determination-of-chitosan-with-congo-red-as-probe
#12
Caijuan Ma, Weiai Zhang, Yaohui Guo, Zhengquan Su, Yan Bai
Two methods were presented for the sensitive and selective determination of chitosan (CTS) with Congo red (CR) as probe based on resonance Rayleigh scattering (RRS) intensities in health products. In weakly acidic buffer solution, the binding of CTS to CR, could result in the enhancement of the RRS intensities. Moreover, after adding OP emulsifier (octyl-phenyl polyoxyethylene ether) to the system, the RRS intensities showed more significantly enhancement. The maximum RRS signals for the CTS-CR system and the CTS-CR-OP system were located at 380 nm and 376 nm, respectively...
June 7, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28590027/a-colorimetric-and-fluorescent-chemosensor-for-selective-detection-of-cu-2-based-on-a-new-diarylethene-with-a-benzophenone-hydrazone-unit
#13
Lili Li, Hui Li, Gang Liu, Shouzhi Pu
A new photochromic diarylethene based on benzophenone hydrazone has been synthesized. Its photochromic and fluorescent properties changed upon alternating irradiation with UV/Vis light and adding Cu(2+) /EDTA in methanol, which showed that the diarylethene could be served as a colorimetric and fluorescent chemosensor for selective detection of Cu(2+) based on internal charge transfer processes. The colorimetric and turn-off fluorescent selective detection of Cu(2+) was attributed to the 2:1 complex of the diarylethene and Cu(2+) ...
June 7, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28590024/one-pot-synthesis-of-fluorescent-nitrogen-doped-carbon-dots-with-good-biocompatibility-for-cell-labeling
#14
Zhengwei Zhang, Kun Yan, Qiulian Yang, Yanhua Liu, Zhengyu Yan, Jianqiu Chen
Here we report an easy and economical hydrothermal carbonization approach to synthesize the fluorescent nitrogen-doped carbon dots (N-CDs) that was developed using citric acid and triethanolamine as the precursors. The synthesis conditions were optimized to obtain the N-CDs with superior fluorescence performances. The as-prepared N-CDs are monodispersed sphere nanoparticles with good water solubility, and exhibited strong fluorescence, favourable photostability and excitation wavelength-dependent behavior. Furthermore, the in vitro cytotoxicity and cellular labeling of N-CDs were investigated using the rat glomerular mesangial cells...
June 7, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28581695/a-new-schiff-base-as-a-turn-off-fluorescent-sensor-for-cu-2-and-its-photophysical-properties
#15
Pritam Torawane, Suban K Sahoo, Amulrao Borse, Anil Kuwar
A new Schiff base receptor 1 was synthesized and its photophysical properties were investigated by absorption, emission and excitation techniques. Furthermore, its chromogenic and fluorogenic sensing abilities towards various metal ions were examined. Receptor 1 selectively detects Cu(2+) ion through fluorescence quenching and detection was not inhibited in the presence of other metal ions. From fluorescence titration, the limit of detection of receptor 1 as a fluorescent 'turn-off' sensor for the analysis of Cu(2+) was estimated to be 0...
June 5, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28581682/effect-of-cooling-rate-on-the-microstructure-and-luminescence-properties-of-sr2-mgsi2-o7-eu-2-dy-3-materials
#16
Ou Hai, Hongyi Jiang, Qiang Zhang, Qiang Ren, Xiulan Wu, Jieliang Hu
Sr2 MgSi2 O7 :Eu(2+) ,Dy(3+) long afterglow materials were prepared by a high-temperature solid-state reaction method with different cooling rates. The cooling rate had a slight effect on X-ray diffraction patterns and photoluminescence performance, but significantly modified the grain boundaries and long afterglow properties of the Sr2 MgSi2 O7 :Eu(2+) ,Dy(3+) materials. When the cooling rate was 1°C/min, grains remained intact with clear grain boundaries. As the cooling rate increased from 1°C/min to 5°C/min, some grain boundaries became indistinguishable...
June 5, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28581680/photoluminescence-properties-of-ca2-al2-o5-re-3-re%C3%A2-%C3%A2-eu-dy-and-tb-phosphors-for-solid-state-lighting
#17
Atul N Yerpude, Vishal R Panse, Sanjay J Dhoble, Namdeo S Kokode, Mudavath Srinivas
Ca2 Al2 O5 :Eu(3+) , Ca2 Al2 O5 :Dy(3+) and Ca2 Al2 O5 :Tb(3+) phosphors were synthesized using a combustion synthesis method. The prepared phosphors were characterized by X-ray powder diffraction for phase purity, by scanning electron microscopy for morphology, and by photoluminescence for emission and excitation measurements. The Ca2 Al2 O5 :Eu(3+) phosphors could be efficiently excited at 396 nm and showed red emission at 594 nm and 616 nm due to (5) D0  → (7) F1 and (5) D0  → (7) F2 transitions...
June 5, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28581184/a-combined-spectroscopic-and-tddft-investigation-of-the-solute-solvent-interactions-of-two-coumarin-derivatives
#18
Shivraj, Anup Thomas, B Siddlingeshwar, Sharanabasappa B Patil
The UV/Vis absorption and fluorescence characteristics of 3-cyano-7-hydroxycoumarin [CHC] and 7-amino-4-methyl-3-coumarinylacetic acid [AMCA-H] were studied at room temperature in several neat solvents and binary solvent mixtures of 1,4-dioxane/acetonitrile. The effects of solvent on the spectral properties are analyzed using single and multi-parameter solvent polarity scales. Both general solute/solvent interactions and hydrogen bond interactions are operative in these systems. The solvation of CHC and AMCA-H dyes in 1,4-dioxane/acetonitrile solvent mixtures has been studied...
June 5, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28581129/paramecium-caudatum-as-a-source-of-nitric-oxide-chemiluminescent-detection-based-on-bluestar-%C3%A2-forensic-reagent-connected-with-microdialysis
#19
Martina Bancirova
Nitric oxide (NO) chemistry inside the body is the most interesting part of its behavior. NO is involved in controlling blood pressure, and in transmitting nerve signals and a variety of other signaling processes. To explain the behavior of NO, it is necessary to determine its immediate concentration or observe time-dependent changes in its concentration. In Paramecium caudatum, NO is formed by calcium-dependent nNOS (NOS1)-like protein, which is distributed in the cytoplasm. NO synthesis affects the ciliary beat and consequent motility of cells and blocked NO synthesis reduces the ability of cells to move...
June 5, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28569442/first-derivative-emission-spectrofluorimetric-method-for-the-determination-of-lcz696-a-newly-approved-fda-supramolecular-complex-of-valsartan-and-sacubitril-in-tablets
#20
Marwa A A Ragab, Shereen M Galal, Mohamed A Korany, Aya R Ahmed
LCZ696 (sacubitril/valsartan, Entresto™) is a therapy lately approved by United States Food and Drug Administration (US FDA) as a heart failure therapy. It is claimed to decrease the mortality rate and hospitalization for patients with chronic heart failure. This study is considered as the first report to investigate the fluorimetric behavior of sacubitril in addition to pursuing all the different conditions that may affect its fluorescence. Various conditions were studied, for example studying the effects of organized media, solvents and pH, which may affect the fluorescence behavior of sacubitril...
June 1, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
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