Results 51 to 60 of about 276,058 (259)

Detection of Anatoxin-a and Three Analogs in Anabaena spp. Cultures: New Fluorescence Polarization Assay and Toxin Profile by LC-MS/MS

Toxins, 2014
Anatoxin-a (ATX) is a potent neurotoxin produced by several species of Anabaena spp. Cyanobacteria blooms around the world have been increasing in recent years; therefore, it is urgent to develop sensitive techniques that unequivocally confirm the ...
Jon A. Sanchez, Paz Otero, Amparo Alfonso, Vitor Ramos, Vitor Vasconcelos, Romulo Aráoz, Jordi Molgó, Mercedes R. Vieytes, Luis M. Botana   +8 more
doaj   +1 more source

A Sensitive Aptamer Fluorescence Anisotropy Sensor for Cd²⁺ Using Affinity-Enhanced Aptamers with Phosphorothioate Modification

Biosensors, 2022
Rapid and sensitive detection of heavy metal cadmium ions (Cd2+) is of great significance to food safety and environmental monitoring, as Cd2+ contamination and exposure cause serious health risk.
Hao Yu, Qiang Zhao
doaj   +1 more source

Projective measurement of a single nuclear spin qubit by using two-mode cavity QED [PDF]

Phys.Rev.Lett.106:160501,2011, 2010
We report the implementation of projective measurement on a single 1/2 nuclear spin of the 171Yb atom by measuring the polarization of cavity-enhanced fluorescence. To obtain cavity-enhanced fluorescence having a nuclear-spin-dependent polarization, we construct a two-mode cavity QED system, in which two cyclic transitions are independently coupled to ...
arxiv   +1 more source

Polarization-correlated photon pairs from a single ion

, 2009
In the fluorescence light of a single atom, the probability for emission of a photon with certain polarization depends on the polarization of the photon emitted immediately before it.
Blinov, Briegel, Browne, C. Schuck, Cabrillo, Carreño, Diedrich, Duan, Dubin, F. Dubin, F. Rohde, Feng, Gerber, Gomer, Gomer, J. Eschner, J. Huwer, Jakob, Jakob, Jurczak, Kimble, M. Almendros, N. Piro, Olmschenk, Rotter, Schubert, Schubert, Simon, Skornia, Volz, Wilk, Wilk, Wilk, Zoller   +33 more
core   +1 more source

Detection of HBV Genotypes of Tumor Tissues and Serum by A Fluorescence Polarization Assay in North-Western China's Hepatocellular Carcinoma Patients

Virology Journal, 2011
Background The understanding of the distribution of hepatitis B virus genotypes and the occult hepatitis B virus infection in hepatocellular carcinoma may shed light into the prevention and treatment of hepatocellular carcinoma.
Liang Ping, Wang Xiangling, Li Ding, Cheng Hong, Wu Zhiqun, Gong Weidong, Lu Jianguo, Zhang Ju   +7 more
doaj   +1 more source

Protonophore activity of short‐chain fatty acids induces their intracellular accumulation and acidification

FEBS Letters, EarlyView.
The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang, Frans Bianchi, Geert van den Bogaart   +2 more
wiley   +1 more source

Probing the Protein-Protein Interaction Between the ATRX_ADD Domain and the Histone H3 Tail

Molecules, 2020
While loss-of-function mutations in the ATRX gene have been implicated as a driving force for a variety of pediatric brain tumors, as well as pancreatic neuroendocrine tumors, the role of ATRX in gene regulation and oncogenic development is not well ...
Angela M. Zaino, Radha Charan Dash, M. Kyle Hadden   +2 more
doaj   +1 more source

Doubly and triply coupled nanowire antennas [PDF]

J. Phys. Chem. C 116, 23779-23784 (2012), 2012
Nanoantenna is one of the most important optical components for light harvesting. In this study, we show experimental evidence of interactions between coupled nanowires by comparing the fluorescence properties of quantum dots on both non-coupled (single) and coupled (double and triple) nanowire arrays.
arxiv   +1 more source

P‐glycoprotein modulates the fluidity gradient of the plasma membrane of multidrug resistant CHO cells

FEBS Letters, EarlyView.
To explore the impact of the overexpression of the multidrug‐transporter P‐glycoprotein (ABCB1) on membrane fluidity, we compared the transversal gradient of mobility and microviscosity in plasma membranes of drug‐sensitive Chinese hamster ovary cells (AuxB1) and their multidrug‐resistant derivatives (B30) using the fluorescent n‐(9‐anthroyloxy) fatty ...
Roger Busche, John R. Riordan, Burkhard Tümmler   +2 more
wiley   +1 more source

Mapping Protein–Protein Interactions of the Resistance-Related Bacterial Zeta Toxin–Epsilon Antitoxin Complex (ε2ζ2) with High Affinity Peptide Ligands Using Fluorescence Polarization

Toxins, 2016
Toxin–antitoxin systems constitute a native survival strategy of pathogenic bacteria and thus are potential targets of antibiotic drugs. Here, we target the Zeta–Epsilon toxin–antitoxin system, which is responsible for the stable maintenance of certain ...
María Isabel Fernández-Bachiller, Iwona Brzozowska, Norbert Odolczyk, Urszula Zielenkiewicz, Piotr Zielenkiewicz, Jörg Rademann   +5 more
doaj   +1 more source