Tuning the Photoinduced Electron-Transfer Thermodynamics in 1,3,5-Triaryl-2-pyrazoline Fluorophores:  X-ray Structures, Photophysical Characterization, Computational Analysis, and in Vivo Evaluation

2003 ◽  
Vol 125 (13) ◽  
pp. 3799-3812 ◽  
Author(s):  
Christoph J. Fahrni ◽  
Liuchun Yang ◽  
Donald G. VanDerveer
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Computational Analysis ◽  
In Vivo Evaluation ◽  
X Ray ◽  
Transfer Thermodynamics

scholarly journals Correction: Photoinduced electron transfer of poly(o-phenylenediamine)–rhodamine B copolymer dots: application in ultrasensitive detection of nitrite in vitro

2017 ◽  
Vol 5 (3) ◽  
pp. 1311-1311
Author(s):  
Fang Liao ◽  
Xun Song ◽  
Siwei Yang ◽  
Chenyao Hu ◽  
Lin He ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Rhodamine B ◽  
Photoinduced Electron Transfer ◽  
Ultrasensitive Detection

Correction for ‘Photoinduced electron transfer of poly(o-phenylenediamine)–rhodamine B copolymer dots: application in ultrasensitive detection of nitrite in vivo’ by Fang Liao et al., J. Mater. Chem. A, 2015, 3, 7568–7574.

In Vivo Evaluation of Zn Foliar Uptake and Transport in Soybean Using X-ray Absorption and Fluorescence Spectroscopy

2019 ◽  
Vol 67 (44) ◽  
pp. 12172-12181 ◽  
Author(s):  
Marcos H. F. Gomes ◽  
Bianca A. Machado ◽  
Eduardo S. Rodrigues ◽  
Gabriel Sgarbiero Montanha ◽  
Mônica Lanzoni Rossi ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Foliar Uptake ◽  
In Vivo Evaluation ◽  
X Ray ◽  
Absorption And Fluorescence Spectroscopy ◽  
X Ray Absorption ◽  
Uptake And Transport

Photoinduced electron transfer of poly(o-phenylenediamine)–Rhodamine B copolymer dots: application in ultrasensitive detection of nitrite in vivo

2015 ◽  
Vol 3 (14) ◽  
pp. 7568-7574 ◽  
Author(s):  
Fang Liao ◽  
Xun Song ◽  
Siwei Yang ◽  
Chenyao Hu ◽  
Lin He ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Rhodamine B ◽  
Photoinduced Electron Transfer ◽  
Ultrasensitive Detection ◽  
Fluorescence Sensing ◽  
Sensing System

An ultrasensitive fluorescence sensing system for NO2−in vivo based on photoinduced electron transfer of poly(o-phenylenediamine)–Rhodamine B copolymer dots is built.

Titania versus Ceria Alumina/Zirconia Composites: Structural Aspects and Biological Tolerance

2012 ◽  
Vol 529-530 ◽  
pp. 595-600
Author(s):  
Simona Cavalu ◽  
Viorica Simon ◽  
Cristian Ratiu ◽  
Vasile Rus ◽  
Ipek Akin ◽  
...  
Keyword(s):  
Structural Characteristics ◽  
Histological Evaluation ◽  
X Ray Diffraction ◽  
In Vivo Evaluation ◽  
X Ray ◽  
Fluoride Treatment ◽  
Qualitative And Quantitative ◽  
Quantitative Results ◽  
Structural Aspects

The aim of our study is to compare the structural and biological tolerance of novel Al2O3/3Y-TZP composites with ceria respectively titania addition (5 wt%). Scanning electron microscopy, X-ray diffraction, infrared spectroscopy and XPS results are reported for structural characteristics and surface modifications upon different fluoride treatments. The biocompatibility of the samples was evaluated using an animal model (rabbit). The explants were analyzed at a specific period (6 weeks).The sections of implanted bone area were subjected to histological evaluation. Upon correlating the structural properties and in vivo evaluation, we concluded that the addition of both TiO2and CeO2to Al2O3/3Y-TZP implies similar properties and satisfactory biological tolerance. With respect to the surface treatment, qualitative and quantitative results show that the alumina/zirconia with titania addition are more sensitive to fluoride treatment.

scholarly journals Photoactivation of Cryptochromes Invokes Competing Inter- and Intramolecular Electron Transfer

2020 ◽  
Author(s):  
Ruslan N. Tazhigulov ◽  
Justin Provazza ◽  
David Coker ◽  
Ksenia B. Bravaya
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Migratory Birds ◽  
Intramolecular Electron Transfer ◽  
Tryptophan Residues ◽  
Theoretical Evidence ◽  
Excited Charge Transfer State

<div>Growing experimental and theoretical evidence points to the key role of cryptochrome proteins in magnetoreception by migratory birds and insects. Cryptochrome photoactivation is achieved through a cascade of electron transfer events leading to formation of a long-lived spin-correlated radical pair. The electron transfer cascade is initiated by photoexcitation of the FAD cofactor and subsequent electron transfer through three conserved tryptophan residues, the so-called tryptophan triad. Presence of ATP was shown to increase the yield of the semireduced form of FAD. While electron transfer through the tryptophan triad is well characterized by both theoretical and experimental methods, the effects of ATP binding are still not well understood. The present work aims to unravel the mechanism of ultrafast photoinduced electron transfer in a cryptochrome protein with a focus on effects of ATP on the FAD photoreduction process. Photoinduced electron transfer is described by means of state-of-the-art theoretical methods: a hybrid quantum-classical polarizable embedding scheme is utilized to accurately parameterize a generalized local excited/charge transfer state system-bath model Hamiltonian and the photoinduced electron transfer process is described by a semiclassical path integral-based dynamics method. The results draw attention to the crucial role of the intramolecular electron transfer from adenine to the flavin moiety of the FAD cofactor for formation of the semireduced form of FAD, providing an explanation for the increased yield of the semireduced form in the presence of the cellular metabolites <i>in vitro</i> and <i>in vivo</i>.</div>

X-ray computed tomography methods for in vivo evaluation of local drug release systems

2002 ◽  
Vol 21 (10) ◽  
pp. 1310-1316 ◽  
Author(s):  
K.A. Salem ◽  
A. Szymanski-Exner ◽  
R.S. Lazebnik ◽  
M.S. Breen ◽  
Jinming Gao ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Drug Release ◽  
In Vivo Evaluation ◽  
X Ray ◽  
X Ray Computed
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