Results 51 to 60 of about 9,952,830 (307)

Enhancement of Characteristics of Field Asymmetric Ion Mobility Spectrometer with Laser Ionization for Detection of Explosives in Vapor Phase

Chemosensors, 2020
Ion mobility spectrometry instrumentation today is widespread in the area of transport security and counterterrorism. This method of detection of explosive substances is highly appreciated for the existence of portable detectors capable of detecting ...
Vitalii A. Kostarev, Gennadii E. Kotkovskii, Alexander A. Chistyakov, Artem E. Akmalov   +3 more
doaj   +1 more source

Deep convolutional neural networks with ensemble learning and transfer learning for capacity estimation of lithium-ion batteries

Applied Energy, 2020
It is often difficult for a machine learning model trained based on a small size of charge/discharge cycling data to produce satisfactory accuracy in the capacity estimation of lithium-ion (Li-ion) rechargeable batteries.
Sheng Shen, Mohammadkazem Sadoughi, Meng Li, Zhengdao Wang, Chao Hu   +4 more
semanticscholar   +1 more source

Ion identity molecular networking for mass spectrometry-based metabolomics in the GNPS environment

Nature Communications, 2021
Molecular networking connects mass spectra of molecules based on the similarity of their fragmentation patterns. However, during ionization, molecules commonly form multiple ion species with different fragmentation behavior.
Robin Schmid, D. Petráš, Louis-Félix Nothias, Mingxun Wang, Allegra T. Aron, A. Jagels, H. Tsugawa, Johannes Rainer, M. Garcia‐Aloy, Kai Dührkop, A. Korf, T. Pluskal, Z. Kameník, A. Jarmusch, A. Caraballo-Rodríguez, Kelly C. Weldon, Mélissa Nothias-Esposito, A. Aksenov, A. Bauermeister, A. A. albarracín Orio, Carlismari O. Grundmann, Fernando Vargas, I. Koester, J. Gauglitz, Emily C. Gentry, Yannick Hövelmann, S. Kalinina, Matthew A. Pendergraft, Morgan Panitchpakdi, R. Tehan, Audrey Le Gouellec, Gajender Aleti, Helena Mannochio Russo, B. Arndt, F. Hübner, H. Hayen, Hui Zhi, M. Raffatellu, K. Prather, L. Aluwihare, Sebastian Böcker, K. McPhail, H. Humpf, U. Karst, P. Dorrestein   +44 more
semanticscholar   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Adjustable ECR ion source control system: Ion Source Hydrogen Positive project

2014 19th IEEE-NPSS Real Time Conference, 2014
ISHP (Ion Source Hydrogen Positive) project consists of a highly versatile ECR type ion source. It has been built for several purposes, on the one hand, to serve as a workbench to test accelerator related technologies and validate in-house made developments, at the first stages.
Arredondo López de Gereñu, Iñigo, Eguiraun, Mikel, Jugo García, Josu, Piso, Daniel, Del Campo, María, Poggi, Tomaso, Varnasseri, Seadat, Feuchtwanger Morales, Jorge, Bilbao, J., González, Xabier, Harper, Giles, Muguira Urtubi, Leire, Miracoli, Rosalba, Corres Ochoa De Olano, Francisco Javier, Belver, Daniel, Echevarria, Pablo, Garmendia, Nagore, González, P., Echevarría Ecenarro, Víctor   +18 more
openaire   +2 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Note: Development of ESS Bilbao's proton ion source: Ion Source Hydrogen Positive

Review of Scientific Instruments, 2014
The Ion Source Hydrogen positive is a 2.7 GHz off-resonance microwave discharge ion source. It uses four coils to generate an axial magnetic field in the plasma chamber around 0.1 T that exceeds the ECR resonance field. A new magnetic system was designed as a combination of the four coils and soft iron in order to increase the reliability of the source.
Miracoli, Rosalba, Feuchtwanger Morales, Jorge, Arredondo López de Gereñu, Iñigo, Belver, Daniel, González, P., Corres Ochoa De Olano, Francisco Javier, Djekic, Slobodan, Echevarria, Pablo, Eguiraun, Mikel, Garmendia, Nagore, Muguira Urtubi, Leire   +10 more
openaire   +3 more sources

Invited Review Article: "Hands-on" laser-driven ion acceleration: A primer for laser-driven source development and potential applications.

Review of Scientific Instruments, 2016
An overview of progress and typical yields from intense laser-plasma acceleration of ions is presented. The evolution of laser-driven ion acceleration at relativistic intensities ushers prospects for improved functionality and diverse applications which ...
J. Schreiber, P. Bolton, K. Parodi
semanticscholar   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Cesiated surface H− ion source: optimization studies

New Journal of Physics, 2017
The H ^− ion beam intensity required for high-energy and high-intensity proton accelerators is continuously increasing. The required 95%-beam transverse normalized root mean square emittance ( ε _95%rnms _x _/ _y ) of the beam is around 0.25 π mm mrad ...
Akira Ueno
doaj   +1 more source