Results 31 to 40 of about 31,277 (294)

Tracking the Rapid Opening and Closing of Polar Coronal Holes through IBEX ENA Observations

The Astrophysical Journal, 2023
Fast solar wind (SW) flows outward from polar coronal holes (PCHs). The latitudinal extent of the fast SW varies during different phases of the solar cycle. The fast SW in the inner heliosheath produces a flatter proton spectrum than the slow SW that can
Bishwas L. Shrestha, Eric J. Zirnstein, David J. McComas   +2 more
doaj   +1 more source

Multi-electron ionization and charge exchange in heavy ion fusion

Journal of Physics: Conference Series, 2008
Together with space-charge neutralization, ionization and charge exchange in the heavy ion beam fusion (HIBF) chamber can change beam quality and final focusing. Our research here supports simulation of these interactions through exploring theoretical approaches and developing improved models. This study is focused on the multi-electron processes which
L Wu, G H Miley
openaire   +1 more source

Charge exchange and ionization in N7+–, N6+–, C6+–H(n=1,2) collisions studied systematically by theoretical approaches [PDF]

, 2012
The introduction of gases like nitrogen or neon for cooling the edge region of magnetically confined fusion plasmas has triggered a renewed interest in state-selective cross sections necessary for plasma diagnostics by means of charge exchange ...
Perneczky, L., Olson, Ronald E., Aumayr, F., Wallerberger, M., Wallerberger, M, Aumayr, F, Veiter, A., Frühwirth, E, Frühwirth, E., Schweinzer, J, Igenbergs, K., Schweinzer, J., Olson, R., Olson, R. E., Olson, R E, Perneczky, L, Igenbergs, K, Veiter, A   +17 more
core   +2 more sources

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Charge exchange in ion-atom collusions relevant to fusion plasma diagnostics [PDF]

, 1998
Total charge exchange and excitation cross-sections are presented for collisions between He(^2+) ions and helium atoms, the laboratory frame collision energy being in the range 16-800keV.
Davies, Peter George
core  

The Excited State and Charge Transfer of Two Nonfullerene Acceptors from First-Principles Many-Body Green’s Function Theory

Journal of Chemistry, 2022
Nonfullerene acceptors (NFAs) have shown an outstanding performance upon producing highly efficient and sustainable organic solar cells (OSC). Recently, a growing group of researchers denoted to modify the structures of acceptor−donor−acceptor-type NFAs ...
Xinyue Bai, Guokui Liu, Yunzhi Li, Guangli Zhou, Xia Leng, Qiying Xia, Yaoyao Wei   +6 more
doaj   +1 more source

Desorption ionization by charge exchange (DICE) for sample analysis under ambient conditions by mass spectrometry [PDF]

Journal of the American Society for Mass Spectrometry, 2010
An ambient pressure ionization technique for mass spectrometric analysis of substances present on solid surfaces was developed. A nebulized spray containing molecular ions of a solvent such as toluene can be generated by passing the solvent through a stainless steel capillary held at a high voltage.
Chan, Chang-Ching, Bolgar, Mark S., Miller, Scott A., Attygalle, Athula B.   +3 more
openaire   +2 more sources

PAK1 activation drives divergent resistance mechanisms to aromatase inhibition and tamoxifen in a luminal: A breast cancer model

Molecular Oncology, EarlyView.
Breast cancer remains a major cause of cancer death in women, frequently developing endocrine therapy resistance. This study demonstrates that upregulated p21‐activated kinase 1 (PAK1) activity drives resistance to tamoxifen and long‐term estrogen deprivation in ER+ breast cancer models.
Luisa Schwarzmüller, Janina Müller, Efstathios‐Iason Vlachavas, Lukas Beumers, Lena Fleischhacker, Sara Burmester, Angelika Wörner, Sabine Karolus, Dominic Helm, Cindy Körner, Stefan Wiemann   +10 more
wiley   +1 more source

Electric Charge State Changing Collisions of Hydrogen and Helium with Low-Z Impurity Particles Part I. Charge Exchange Processes [PDF]

, 2008
This report contains a collection of practical approximating formulas for one-electron loss and one-electron capture cross-sections of ion-atom and ion-ion collisions of H0, H+, He0, He+ and He2+ particles with Li, Be, B, C and Ne neutral atoms and all ...
SUDO, Shigeru, TOLSTIKHINA, Inga Yu., SERGEEV, Vladimir Yu., OZAKI, Tetsuo, TAMURA, Naoki, GONCHAROV, Pavel R.   +5 more
core  

Efficiency of δ-Tocopherol in Inhibiting Lipid Oxidation in Emulsions: Effects of Surfactant Charge and of Surfactant Concentration

Antioxidants, 2023
Charged interfaces may play an important role in the fate of chemical reactions. Alterations in, for instance, the interfacial acidity of emulsions induced by the charge of the surfactant head group and associated counterions may change the ionization ...
Tamara Martínez-Senra, Sonia Losada-Barreiro, Carlos Bravo-Díaz   +2 more
doaj   +1 more source