Results 21 to 30 of about 57,365 (255)

Activity measurement of 55Fe using the liquid scintillation TDCR method

He jishu, 2023
Background55Fe is a low-energy radionuclide that is difficult to measure and decays to a ground state of 55Mn through pure electron capture (EC), accompanied by the emission of Auger electrons and low-energy X-ray.
LIU Haoran, ZHOU Qianqian, LIANG Juncheng, YUAN Daqing   +3 more
doaj   +1 more source

222Rn Determination in Water and Brine Samples Us-ing Liquid Scintillation Spectrometry

Brazilian Journal of Radiation Sciences, 2019
Liquid scintillation spectrometry (LSC) is the most common technique used for 222Rn determination in environmental aqueous sample. In this study, the performance of water-miscible (Ultima Gold AB) and immiscible (Optiscint) liquid scintillation cocktails
Thiago César Oliveira, Roberto Pellacani Guedes Monteiro, Rubens Martins Moreira, Arno Heeren de Oliveira   +3 more
doaj   +1 more source

Universal calibration of a scintillation spectrometer with a NaI(Tl) detector when measuring 137Cs activity in counting samples of arbitrary density and volume

Радиационная гигиена, 2021
The article proposes an empirical method for constructing a universal calibration for a scintillation gamma spectrometer, which allows determining the activity and specific activity of 137Cs with an accuracy of no more than 15% in counting samples of ...
K. A. Sednev, V. A. Nekrasov, V. S. Repin   +2 more
doaj   +1 more source

Basic Performance Evaluation of a Radiation Survey Meter That Uses a Plastic-Scintillation Sensor

Sensors
After the Fukushima nuclear power plant accident in 2011, many types of survey meters were used, including Geiger–Müller (GM) survey meters, which have long been used to measure β-rays.
Keisuke Yamamoto, Ryota Shindo, Saya Ohno, Satoe Konta, Rio Isobe, Yohei Inaba, Masatoshi Suzuki, Yoshio Hosoi, Koichi Chida   +8 more
doaj   +1 more source

Multiwell 14CO2-Capture Assay for Evaluation of Substrate Oxidation Rates of Cells in Culture

BioTechniques, 1998
14CO2 capture is commonly used to evaluate the cellular oxidation rate of respiratory substrates. A modification of the established 14CO2-capture method was developed that enables the use of cells in adherent culture and easy analysis of multiple samples
Cynthia L. Collins, Barrie P. Bode, Wiley W. Souba, Steve F. Abcouwer   +3 more
doaj   +1 more source

In vitro and in silico modelling of ROS1‐positive non‐small cell lung cancer reveals fusion‐dependent tyrosine kinase inhibitor responses

Molecular Oncology, EarlyView.
Drug resistance limits treatment success in a subset of lung cancers driven by ROS1 gene alterations. Using patient‐derived cells and computer simulations, we studied three key mutations and how they affect five targeted drugs. The mutations reduced drug effectiveness in different ways by altering protein structure and behavior.
Farhan Ul Haq, Marc Terrones, Felicia Rodrigues Fortes, Anne Schepers, Alessia Denis, Christophe Deben, Ken Op de Beeck, Guy Van Camp, Geert Vandeweyer   +8 more
wiley   +1 more source

Assessment of Uptake and Biodistribution of Radiolabeled Cholesterol in Mice Using Gavaged Recombinant Triglyceride-rich Lipoprotein Particles (rTRL)

Bio-Protocol, 2018
The here described method can be used to estimate the uptake of orally provided cholesterol in mice. Briefly, mice are gavaged with radiolabeled cholesterol and 4 h later, organ distribution of the radiolabel is determined by liquid scintillation ...
Anna Worthmann, Clara John, Joerg Heeren
doaj   +1 more source

Identifying transcription factors controlling the basal expression of human MRP4 highlights a substantial role for Sp1

FEBS Open Bio, EarlyView.
The MRP4 transporter exports several drugs and signaling molecules. Here, we identified key promoter elements regulating basal MRP4 expression. Using reporter assays, we defined a conserved region with essential Sp1 and contributory Ets sites, which controlled basal MRP4 expression.
Debora Singer, Angelique Kragl, Katrin Ziems, Juliane Glaubitz, Sophie Grammbauer, Susanne Hildebrandt, Mladen V. Tzvetkov, Gabriele Jedlitschky   +7 more
wiley   +1 more source

Die Anwendung radiochemischer Analysenmethoden zur Bestimmung von Zink- und Calciumspuren in Gallium

CHIMIA, 1961
The method ot thermal neutron activation analysis has been utilized for the determination of calcium and zinc traces in metallic gallium. This method allows to measure amounts of calcium as low as one p.p.m.
Pierre Lerch, Leo Kreienbühl
doaj   +1 more source

An Advanced Optimization Method to Minimize the Detection Limit of Liquid Scintillation Counter to Measure Low-Level Tritium Activity in Groundwater

Radiation, 2023
In arid regions, the tritium concentration in groundwater is typically very low and often falls below the minimum detectable activity (MDA) of the conventional liquid scintillation counter (LSC).
Al Mamun
doaj   +1 more source