Results 111 to 120 of about 1,151,732 (292)

Spin-dependent electron dynamics and recombination in GaAs(1-x)N(x) alloys at room temperature

, 2006
We report on both experimental and theoretical study of conduction-electron spin polarization dynamics achieved by pulsed optical pumping at room temperature in GaAs(1-x)N(x) alloys with a small nitrogen content (x = 2.1, 2.7, 3.4%). It is found that the
A. Yu. Egorov, A. Yu. Egorov, A. Yu. Shiryaev, C. Weisbuch, D. Lagarde, D. Paget, E. L. Ivchenko, L. Lombez, P. H. Song, R. C. Miller, T. Amand, V. K. Kalevich, V. K. Kalevich, X. Marie   +13 more
core   +1 more source

Dapagliflozin prevents methylglyoxal‐induced retinal cell death in ARPE‐19 cells

FEBS Open Bio, EarlyView.
Diabetic macular oedema is a diabetes complication of the eye, which may lead to permanent blindness. ARPE‐19 are human retinal cells used to study retinal diseases and potential therapeutics. Methylglyoxal is a compound increased in uncontrolled diabetes due to elevated blood glucose.
Naina Trivedi, Zainab Quraishi, Shima Khezri Azizi Far, Madaleine Ward, Aidan Conway, Reem Abdulredha, Eman Mshari, Yousif A. Shamsaldeen   +7 more
wiley   +1 more source

Detection of pulsating aurora from GNSS total electron content

Earth, Planets and Space
This study investigates, for the first time, the effect of pulsating aurora on the Global Navigation Satellite System (GNSS) total electron content (TEC).
Judit Pérez-Coll Jiménez, Nickolay Ivchenko, Tima Sergienko, Pierre J. Cilliers, Keisuke Hosokawa, Yasunobu Ogawa, Tero Raita   +6 more
doaj   +1 more source

Study of Spatial and Temporal Variations of Ionospheric Total Electron Content in Japan, during 2014-2019 and the 2016 Kumamoto Earthquake. [PDF]

Sensors (Basel), 2021
Hu T, Yao Y, Kong J.
europepmc   +1 more source

Long‐term trends in the total electron content

Geophysical Research Letters, 2017
AbstractThe total electron content (TEC) is important among others for Global Navigation Satellite Systems/GPS signal propagation and applications. However, there is only one comprehensive analysis of TEC trends, and the resulted trends are not consistent with trends in other ionospheric parameters. Here we use the TEC data of Lean et al.
Jan Lastovicka, Jaroslav Urbar, Michal Kozubek   +2 more
openaire   +1 more source

Dihydroorotate dehydrogenase (DHODH) regulates trophoblast syncytialization through organelle stress–induced cellular senescence

FEBS Open Bio, EarlyView.
The inhibition of mitochondrial dihydroorotate dehydrogenase (DHODH) impairs syncytialization and induces cellular senescence via mitochondrial and endoplasmic reticulum stress in human trophoblast stem cells, elevating sFlt1/PlGF levels, a hallmark of placental dysfunction in hypertensive disorders of pregnancy.
Kanoko Yoshida, Kazuya Kusama, Ayaka Horiuchi, Yu Kawaguchi, Atsuya Tsuru, Mikihiro Yoshie, Kazuhiro Tamura   +6 more
wiley   +1 more source

Positive and negative ionospheric disturbances prior to the 2016 christmas earthquake in Chile

Geomatics, Natural Hazards & Risk, 2019
Global ionospheric maps (GIMs) provided by the Center for Orbit Determination in Europe (CODE) served to analyze ionospheric disturbances prior to the December 25, 2016 earthquake in Chile.
C. Sotomayor-Beltran
doaj   +1 more source

Solving a navigation problem with the total electron content model GEMTEC

Solar-Terrestrial Physics, 2019
This article explores the possibility of improving the accuracy of positioning in single-frequency satellite radio navigation equipment through the use of an empirical model of the total electronic content GEMTEC.
Kholmogorov A.A., Ivanov V.B., Gorbachev O.A.   +2 more
doaj   +1 more source

Development of a local empirical model of ionospheric total electron content (TEC) and its application for studying solar-ionospheric effects. [PDF]

Sci Rep, 2021
Davoudifar P, Tabari KR, Shafigh AAE, Ajabshirizadeh A, Bagheri Z, Akbarian Tork Abad F, Shayan M.   +6 more
europepmc   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source