Results 81 to 90 of about 30,961 (212)

Narrow-band emission with 0.5 to 3.5 Hz varying frequency in the background of the main phase of the 17 March 2013 magnetic storm

Solar-Terrestrial Physics, 2016
We present results of the analysis of an unusually long narrow-band emission in the Pc1 range with increasing carrier frequency. The event was observed against the background of the main phase of a strong magnetic storm caused by arrival of a high-speed ...
Potapov A.S., Dovbnya B.V., Baishev D.G., Polyushkina T.N., Rakhmatulin R.A.   +4 more
doaj   +1 more source

Microbial Controls on Dissolved Organic Nitrogen Cycling During Long‐Term Degradation Experiments

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Dissolved organic nitrogen (DON) is critical for marine microbial growth by providing carbon and nitrogen. Although DON is rapidly cycled, some compounds within this pool can persist for long‐periods of time. To better understand how DON is cycled by marine microorganisms, we conducted 548‐day incubations using surface‐derived dissolved ...
Richard LaBrie, Roxane Maranger, Luc Tremblay, Jennifer Cherrier, Jean‐Eric Tremblay, Nagissa Mahmoudi   +5 more
wiley   +1 more source

The consequences of tritium mix for simulated ion cyclotron emission spectra from deuterium-tritium plasmas

Nuclear Fusion
Measurements of ion cyclotron emission (ICE) are obtained from most large magnetically confined fusion plasma experiments, and may be used in future to quantify properties of the fusion-born alpha-particle population in deuterium-tritium (DT) plasmas in ...
T.W. Slade-Harajda, S.C. Chapman, R.O. Dendy   +2 more
doaj   +1 more source

A Biochar‐Based Composite Hydrogel Microenvironment for Enhanced Biocatalysis

Advanced Materials, Volume 38, Issue 26, 8 May 2026.
This work presents the synthesis of a polyacrylamide hydrogel wherein biomass‐derived biochar is co‐encapsulated with the enzyme horseradish peroxidase (HRP). The resulting composite hydrogel possesses balanced electron‐rich and electron‐deficient domains, creating an optimal microenvironment that concentrates both hydrogen peroxide and phenol ...
Shengzhe Wang, Jingling Zhu, Weiyang Xue, Yuting Wen, Zhongxing Zhang, Xia Song, Yuan Yu, Chenglin Sun, Huangzhao Wei, Jun Li   +9 more
wiley   +1 more source

Physics of beam-driven ion cyclotron emission in the large plasma device

Nuclear Fusion
Ion cyclotron emission (ICE) is widely observed from spatially localised minority energetic ion populations in toroidal magnetically confined fusion (MCF) plasmas, both tokamaks and stellarators.
O. Samant, R.O. Dendy, S.C. Chapman, S.K.P. Tripathi, T. Carter, B. Van Compernolle, J.W.S. Cook   +6 more
doaj   +1 more source

Emittance Measurement for Beamline Extension at the PET Cyclotron

Science and Technology of Nuclear Installations, 2016
Particle-induced X-ray emission is used for determining the elemental composition of materials. This method uses low-energy protons (of several MeV), which can be obtained from high-energy (of tens MeV) accelerators.
Sae-Hoon Park, Sang-Hoon Lee, Yu-Seok Kim   +2 more
doaj   +1 more source

Progress in stellarator research at IPP-Kharkov

Nukleonika, 2016
A new antenna of ‘crankshaft’ type has been installed in the Uragan-2M device in order to increase the plasma density and heating below the ion cyclotron frequency. Antenna operation is modelled by 1D code, which solves boundary problem for time-harmonic
Moiseenko Vladimir E., Lozin Oleksiy V., Shapoval Anatoliy M., Dreval Mykola B., Kulyk Yuliya S., Mironov Yuri K., Romanov Vladyslav S., Pashnev Valeriy K., Sorokovoy Eduard L., Petrushenya Andriy A., Ozherel’ev Fedir I., Kozulya Mykhailo M., Konovalov Volodymyr G., Maznichenko Sergiy M., Garkusha Igor E.   +14 more
doaj   +1 more source

Radiolytically reworked Archean organic matter in a habitable deep ancient high-temperature brine

Nature Communications, 2023
Investigations of abiotic and biotic contributions to dissolved organic carbon (DOC) are required to constrain microbial habitability in continental subsurface fluids.
Devan M. Nisson, Clifford C. Walters, Martha L. Chacón-Patiño, Chad R. Weisbrod, Thomas L. Kieft, Barbara Sherwood Lollar, Oliver Warr, Julio Castillo, Scott M. Perl, Errol D. Cason, Barry M. Freifeld, Tullis C. Onstott   +11 more
doaj   +1 more source

Differential Drivers of Thermogenic and Bulk Dissolved Organic Matter in the Indian Ocean

Global Biogeochemical Cycles, Volume 40, Issue 5, May 2026.
Abstract The oceanic dissolved organic matter (DOM) pool contains a substantial fraction of recalcitrant carbon, with thermogenic organic compounds representing a chemically distinct, long‐lived component. However, the distribution and transformation of these compounds remain poorly constrained in the Indian Ocean, a key basin of the global overturning
Tassiana S. G. Serafim, Heike Simon, Jutta Niggemann, Christopher P. Rüger, Ralf Zimmermann, Tabea N. L. Mairon, Joanna J. Waniek, Helena Osterholz   +7 more
wiley   +1 more source

Relativistic Cyclotron Radiation Detection of Tritium Decay Electrons as a New Technique for Measuring the Neutrino Mass

, 2009
The shape of the beta decay energy distribution is sensitive to the mass of the electron neutrino. Attempts to measure the endpoint shape of tritium decay have so far seen no distortion from the zero-mass form, thus placing an upper limit of m_nu_beta ...
Benjamin Monreal, E. Fermi, Joseph A. Formaggio   +2 more
core   +1 more source