Results 91 to 100 of about 1,627,153 (385)

Study on the fuzzy proportional–integral–derivative direct torque control strategy without flux linkage observation for brushless direct current motors

International Journal of Advanced Robotic Systems, 2019
Considering the difficulty in setting and observing the flux linkage in the existing direct torque control for the brushless direct current motor, which is the cumbersome torque calculation method in direct torque control systems without flux linkage ...
Shi Peicheng, Wang Suo, Zhang Rongyun, Xiao Ping   +3 more
doaj   +1 more source

Direct comparison between solid state Silicon+6LiF and 3He gas tube neutron detectors

Results in Physics, 2016
During the last decade the worldwide lack of 3He for neutron detection has triggered research and development on alternative technologies and methods.
A. Pappalardo, C. Vasi, P. Finocchiaro
doaj   +1 more source

Method of measuring the thickness of radioactive thin films [PDF]

, 1974
Thickness monitor consists of proportional X-ray counter coupled to pulse counting system, copper filter over face of counter, rotatable collimator containing radioactive source, and rotatable shutter.
Alger, D. L., Makinen, M. D., Steinberg, R.   +2 more
core   +1 more source

Inhibiting stearoyl‐CoA desaturase suppresses bone metastatic prostate cancer by modulating cellular stress, mTOR signaling, and DNA damage response

FEBS Letters, EarlyView.
Bone metastasis in prostate cancer (PCa) patients is a clinical hurdle due to the poor understanding of the supportive bone microenvironment. Here, we identify stearoyl‐CoA desaturase (SCD) as a tumor‐promoting enzyme and potential therapeutic target in bone metastatic PCa.
Alexis Wilson, Mackenzie K Herroon, Shane Mecca, Laimar C Garmo, Jacob Lindquist, Shrila Rajendran, Steve M. Patrick, Izabela Podgorski   +7 more
wiley   +1 more source

A Precision Alpha-Proportional Counter

Review of Scientific Instruments, 1947
An instrument is described which will detect and record the alpha-disintegration rate of prepared radioactive samples even though soft beta-radiation up to 5×109 disintegrations per minute may also be present. The counting losses arising from the detector, electronic amplifier, scaler, and recorder total 0.8 percent with an alpha-counting rate of 105 ...
openaire   +3 more sources

β‐TrCP overexpression enhances cisplatin sensitivity by depleting BRCA1

Molecular Oncology, EarlyView.
Low levels of β‐TrCP (Panel A) allow the accumulation of BRCA1 and CtIP, which facilitate the repair of cisplatin‐induced DNA damage via homologous recombination (HR) and promote tumor cell survival. In contrast, high β‐TrCP expression (Panel B) leads to BRCA1 and CtIP degradation, impairing HR repair, resulting in persistent DNA damage and apoptosis ...
Rocío Jiménez‐Guerrero, Alejandro Belmonte‐Fernández, Mónica González‐Moreno, Laura Rodríguez‐Cordero, Begoña Pérez‐Valderrama, Joaquín Herrero‐Ruíz, Francisco Romero, Carmen Sáez, Miguel Á. Japón   +8 more
wiley   +1 more source

Correction of Gas Multiplication Uniformity of X-ray Detector by Voltage Compansation Method [PDF]

Journal of Astronomy and Space Sciences, 1993
We experiment on the method to obtain the uniform gas multiplication in multiwire proportional counter. The general technique of anode wire connection to the high voltage supply could not secure the uniformity of multiplication because of the edge effect
Uk-Won Nam, Chul-Sung Choi, Shin Haeng Moon   +2 more
doaj  

A time-resolution study with a plastic scintillator read out by a Geiger-mode Avalanche Photodiode

, 2011
In this work we attempt to establish the best time resolution attainable with a scintillation counter consisting of a plastic scintillator read out by a Geiger-mode Avalanche Photodiode.
A. Stoykov, Agostinelli, Allison, K. Sedlak, Moszynski, Moszynski, Prokscha, R. Scheuermann, Renker, Stoykov, Stoykov   +10 more
core   +1 more source

PARP inhibitors elicit distinct transcriptional programs in homologous recombination competent castration‐resistant prostate cancer

Molecular Oncology, EarlyView.
PARP inhibitors are used to treat a small subset of prostate cancer patients. These studies reveal that PARP1 activity and expression are different between European American and African American prostate cancer tissue samples. Additionally, different PARP inhibitors cause unique and overlapping transcriptional changes, notably, p53 pathway upregulation.
Moriah L. Cunningham, Jasibel Vasquez‐Gonzalez, Samantha M. Barnada, Salome Tchotorlishvili, Latese Jones, Ryan Maguire, Genevieve Lewis, Kinza Rizwan, Jenny Deng, Salma Koachar, Drithi Patel, Hailey Shankle, Tessa Mulders, Namra Ajmal, Charalambos Solomides, Emad S. Alnemri, Teresa F. Alnemri, Ayesha A. Shafi, Leonard G. Gomella, Wm Kevin Kelly, Steven B. McMahon, Matthew J. Schiewer   +21 more
wiley   +1 more source

Proportional Counter in X-ray Fluorescence

Aksaray University Journal of Science and Engineering, 2021
The purpose of this work is to investigate and quantify x-ray fluorescence, its production and its spectroscopy. Characteristic x-ray with different energies was obtained from six various elements using Am-241 source with 59.5 keV. It was found that x-ray energy and intensity increase with increasing atomic number of material.
openaire   +3 more sources