Luminescence

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Photoluminescence properties of a novel phosphor CaB2O4:Eu3+ under NUV excitation
Luminescence - Tập 24 Số 6 - Trang 363-366 - 2009
Junli Huang, Liya Zhou, Qi Pang, Fuzhong Gong, Jianhua Sun, Wei Wang
AbstractThe new borate phosphor CaB2O4:Eu3+ was synthesized by solid‐state method and their photoluminescence properties were investigated. The results show that the pure phase of CaB2O4 could be available at 900°C, CaB2O4... hiện toàn bộ
Application in photocatalytic degradation of zearalenone based on graphitic carbon nitride
Luminescence - Tập 37 Số 2 - Trang 190-198 - 2022
Li Li, Xiaoxue Shan, Zhang Yuchong, Jin Wang, Liao Zilong, Yuxi Gu, Shuai Chen, Youjun Jiang, Jinying Chen
AbstractA semiconductor nano‐material was prepared, and its degradation efficiency of zearalenone (ZEN) was studied. The photocatalytic material graphitic carbon nitride (g‐C3N4) was synthesized by the traditional method of hot cracking. Its structure was characterized by X‐ray diffraction (XRD), Fourier‐transform infrared ...... hiện toàn bộ
Effect of heteroatom‐doped carbon quantum dots on the red emission of metal‐conjugated phthalocyanines through hybridization
Luminescence - Tập 37 Số 2 - Trang 268-277 - 2022
Şule Eryiğit, Ali Gelir, Esranur Budak, Caner Ünlü, Azize Gömleksiz, İbrahim Özçeşmeci, Ahmet Gül
AbstractQuantum dots (QDs) are significant fluorescent materials for energy transfer studies with phthalocyanines (Pcs) and phthalocyanine (Pc)‐like biomolecules (such as chlorophylls). Carbon‐based QDs, especially, have been used in numerous studies concerning energy transfer with chlorophylls, but the numbers of studies concerning energy transfer between phthaloc...... hiện toàn bộ
Increasing the specificity of the forensic luminol test for blood
Luminescence - Tập 16 Số 3 - Trang 251-253 - 2001
T. I. Quickenden, Paul D. Cooper
AbstractIt is shown that the presumptive luminol chemiluminescence test for the presence of traces of blood can be made more determinative by measuring the peak emission wavelength of the luminol chemiluminescence. When sprayed onto a surface containing traces of human haemoglobin, a 1 g/L solution of aqueous luminol containing 7 g/L sodium perborate gives an emiss...... hiện toàn bộ
Development of a robust reporter gene assay for measuring the bioactivity of OX40‐targeted therapeutic antibodies
Luminescence - Tập 36 Số 4 - Trang 885-893 - 2021
Meng Li, Lan Wang, Chuanfei Yu, Junzhi Wang
AbstractOX40 plays a prominent role in the onset and development of solid tumors, and OX40‐targeted monoclonal antibodies (mAbs) have entered clinical trials for various tumors. Bioactivity determination of therapeutic mAbs is of great significance in product quality, however, mechanism of action‐based bioassays to determine the bioactivity of anti‐OX40 mAbs is sti...... hiện toàn bộ
Construction of photodynamic‐effect immunofluorescence probes by a complex of quantum dots, immunoglobulin G and chlorin e6 and their application in HepG2 cell killing
Luminescence - Tập 31 Số 6 - Trang 1174-1181 - 2016
Zhengyu Yan, Lili Wang, Meng‐Ying Fei, Xinying Liu, Yilong Su, Qingqing Du, Sheng‐Mei Wu
AbstractIn this study, tri‐functional immunofluorescent probes (Ce6–IgG–QDs) based on covalent combinations of quantum dots (QDs), immunoglobulin G (IgG) and chlorin e6 (Ce6) were developed and their photodynamic ability to induce the death of cancer cells was demonstrated. Strategically, one type of second‐generation photosensitizer, Ce6, was first coupled with an...... hiện toàn bộ
Energy transfer analysis and realization of cool to warm white light in Dy3+/Sm3+/Er3+ triply doped multicomponent borosilicate glass for white light generation
Luminescence - Tập 36 Số 6 - Trang 1422-1434 - 2021
Adon Jose, T. Krishnapriya, Twinkle Anna Jose, A. C. Saritha, Cyriac Joseph, P.R. Biju
AbstractA series of Dy3+/Sm3+/Er3+ triply doped multicomponent borosilicate glasses (DSE) was synthesized using varying Er3+ ions concentrations through a conventional melt quenching technique. The influence of triple doping on the optical characteristics of the prepared glass was e...... hiện toàn bộ
Superoxide anion radical scavenging property of catecholamines
Luminescence - Tập 28 Số 4 - Trang 450-455 - 2013
Aleksandra Kładna, Paweł Berczyński, Irena Kruk, Teresa Michalska, Hassan Y. Aboul‐Enein
ABSTRACTThe direct effect of the four catecholamines (adrenaline, noradrenaline, dopamine and isoproterenol) on superoxide anion radicals () was investigated. The reaction between 18‐crown‐6‐ether and potassium superoxide in dimethylsulfoxide was used as a source of . The reactivity of catecholamines with was examined using chemiluminescence, reduction of nitroblue tetrazolium and electron paramagnetic resonance spin‐trapping techniques. 5,5‐Dimethyl‐1‐pyrroline‐N‐oxide was included as the spin trap. The results showed that the four catecholamines were effective and efficient in inhibiting chemiluminescence accompanying the potassium superoxide/18‐crown‐6‐ether system in a dose‐dependent manner over the range 0.05–2 mm in the following order: adrenaline > noradrenaline > dopamine > isoproterenol, with, IC50 = 0.15 ± 0.02 mm 0.21 ± 0.03 mm, 0.27 ± 0.03 mm and 0.50 ± 0.04 mm, respectively. The catecholamines examined also exhibited a strong scavenging effect towards hiện toàn bộ
Scavenging of hydroxyl radical by catecholamines
Luminescence - Tập 27 Số 6 - Trang 473-477 - 2012
Aleksandra Kładna, Paweł Berczyński, Irena Kruk, Teresa Michalska, Hassan Y. Aboul‐Enein
ABSTRACTThe direct effects of the four catecholamines (CATs), adrenaline (A), noradrenaline (NA), dopamine (D) and isoproterenol (I), on free radicals were investigated using the free radical 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH•) and hydroxyl radial (HO•). The CATs examined were found to inhibit the ESR signal intensity of ...... hiện toàn bộ
Effect of γ‐irradiation on optical properties of Eu2O3‐doped polystyrene polymer films
Luminescence - Tập 33 Số 7 - Trang 1243-1248 - 2018
Shilpa Bhavsar, Gnansagar B. Patel, N. L. Singh
AbstractIn the present study, europium (III) oxide (Eu2O3)‐doped polystyrene (PS) polymer films were synthesized using a solution‐casting technique for different filler levels. These films were irradiated with 5, 25 and 50 kGy γ doses and characterized using various techniques, viz. X‐ray diffraction (XRD), and UV–visible a...... hiện toàn bộ
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