Capitalizing Resolving Power of Density Gradient Ultracentrifugation by Freezing and Precisely Slicing Centrifuged Solution: Enabling Identification of Complex Proteins from Mitochondria by Matrix Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry by Haiqing Yu, Joann J. Lu, Wei Rao, Shaorong Liu

“…After fractionation, we analyze complex V proteins directly on a matrix assisted laser desorption/ionization, time-of-flight mass spectrometer. Twelve out of fifteen subunits of complex V are positively identified. …”
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GOLD Observations of Equatorial Plasma Bubbles Reaching Mid‐Latitudes During the 23 April 2023 Geomagnetic Storm by Deepak Kumar Karan, Carlos R. Martinis, Richard W. Eastes, Robert E. Daniell, William E. McClintock, Chao‐Song Huang

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A Global Empirical Model of Electron Density Profile in the F Region Ionosphere Basing on COSMIC Measurements by Qiaoling Li, Libo Liu, Maosheng He, He Huang, Jiahao Zhong, Na Yang, Man‐Lian Zhang, Jinzhe Jiang, Yiding Chen, Huijun Le, Jun Cui

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Universal behavior of tunneling time and barrier time-delay decoupling in attoclock measurements by Ossama Kullie

Subjects: “…tunneling and tunnel ionization time-delay…”
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Deployment and evaluation of an NH₄⁺∕ H₃O⁺ reagent ion switching chemical ionization mass spectrometer for the detection of reduced and oxygenated gas-phase organic compounds by C. L. Zang, M. D. Willis

“…<p>Reactive organic carbon (ROC) is diverse in its speciation, functionalization, and volatility, with varying implications for ozone production and secondary organic aerosol formation and growth. Chemical ionization mass spectrometry (CIMS) approaches can provide in situ ROC observations, and the CIMS reagent ion controls the detectable ROC species. …”
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Elucidation of α-glucosidase inhibitory activity and UHPLC-ESI-QTOF-MS based metabolic profiling of endophytic fungi Alternaria alternata BRN05 isolated from seeds of Swietenia mac... by Piyush Kumar, Sai Anand Kannakazhi Kantari, Ranendra Pratap Biswal, Prasanth Ghanta, Malleswara Dharanikota

Subjects: “…ultra-high-performance liquid chromatography - electrospray ionization - quadrupole time-of-flight mass spectrometry (UHPLC-ESI-QTOF-MS)…”
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Factors governing $${\rm H}_{3}^{+}$$ H 3 + formation from methyl halogens and pseudohalogens by Jacob Stamm, Swati S. Priyadarsini, Shawn Sandhu, Arnab Chakraborty, Jun Shen, Sung Kwon, Jesse Sandhu, Clayton Wicka, Arshad Mehmood, Benjamin G. Levine, Piotr Piecuch, Marcos Dantus

“…We report yield and femtosecond time-resolved measurements following the strong-field double ionization of CH3X molecules, where X = OD, Cl, NCS, CN, SCN, and I. …”
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Development of a Novel Micro Photoionization Detector for Rapid Volatile Organic Compounds Measurement by Qi Zhou, Sixiang Zhang, Xu Zhang, Xu Ma, Wei Zhou

“…Then an ionization chamber with low interference and fast response was developed. …”
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Over-Response Correction of SNC 350p ROOS and PTW Markus Chambers in the Surface Dose and Build-Up Region Dosimetry of 6MV Photon Beam by Deepali Patil, Mukesh Zope, DINESH SAROJ, Aslam P. A., Basil George

“…Introduction: The design characteristics of ionization chambers are critical for the accurate measurement of Percentage Surface Dose (PSD) and Percentage Depth Dose (PDD) in the build-up region. …”
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Koopmans' Analysis of Chemical Hardness with Spectral-Like Resolution by Mihai V. Putz

“…Three approximation levels of Koopmans' theorem are explored and applied: the first referring to the inner quantum behavior of the orbitalic energies that depart from the genuine ones in Fock space when the wave-functions' Hilbert-Banach basis set is specified to solve the many-electronic spectra of spin-orbitals' eigenstates; it is the most subtle issue regarding Koopmans' theorem as it brings many critics and refutation in the last decades, yet it is shown here as an irrefutable “observational” effect through computation, specific to any in silico spectra of an eigenproblem; the second level assumes the “frozen spin-orbitals” approximation during the extracting or adding of electrons to the frontier of the chemical system through the ionization and affinity processes, respectively; this approximation is nevertheless workable for great deal of chemical compounds, especially organic systems, and is justified for chemical reactivity and aromaticity hierarchies in an homologue series; the third and the most severe approximation regards the extension of the second one to superior orders of ionization and affinities, here studied at the level of chemical hardness compact-finite expressions up to spectral-like resolution for a paradigmatic set of aromatic carbohydrates.…”
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Solid-Phase Extraction Strategies to Surmount Body Fluid Sample Complexity in High-Throughput Mass Spectrometry-Based Proteomics by Marco R. Bladergroen, Yuri E. M. van der Burgt

“…Obtained peptide and protein fractions can be mass analyzed by direct infusion into an electrospray ionization (ESI) source or by means of matrix-assisted laser desorption ionization (MALDI) without further need of time-consuming liquid chromatography (LC) separations.…”
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Ultra High-Mass Resolution Paper Spray by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry by Kevin D. Quinn, Charmion I. Cruickshank, Troy D. Wood

“…Paper Spray Ionization is an atmospheric pressure ionization technique that utilizes an offline electro-osmotic flow to generate ions off a paper medium. …”
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Pearson's Hard-Soft Acid-Base Principle as a Means of Interpreting the Reactivity of Carbon Materials by M. Wiśniewski, P.A. Gauden

“…The well-known theoretical reactivity indices (ionization potential, electron affinity and global softness) were calculated for the adsorbents analyzed. …”
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Collision Frequency and Energy Transfer Rate in e–He Scattering by Yeldos Seitkozhanov, Karlygash Dzhumagulova, Erik Shalenov, Murat Jumagulov

“…Using the optical interaction potential between an electron and a helium atom, we have calculated the momentum-transfer cross-section, collision frequency, and energy transfer rate during elastic electron–helium scattering, focusing on energies up to the ionization threshold of helium (24.6 eV). The interaction potential includes static, polarization, and exchange contributions, accurately representing the scattering process in this range. …”
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Primary quantum thermometry of mm-wave blackbody radiation via induced state transfer in Rydberg states of cold atoms by Noah Schlossberger, Andrew P. Rotunno, Stephen P. Eckel, Eric B. Norrgard, Dixith Manchaiah, Nikunjkumar Prajapati, Alexandra B. Artusio-Glimpse, Samuel Berweger, Matthew T. Simons, Dangka Shylla, William J. Watterson, Charles Patrick, Adil Meraki, Rajavardhan Talashila, Amanda Younes, David S. La Mantia, Christopher L. Holloway

“…We use selective field ionization readout of Rydberg states with principal quantum number n∼30 in ^{85}Rb and substantiate our ionization signal with a theoretical model. …”
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Coordinated Velocity Shift of Multiple C iv and Si iv Broad Absorption Lines in Quasar SDSS J113048.45+225206.6 by Wei-Jian Lu, Ying-Ru Lin

“…These shifts were accompanied by coordinated variations in equivalent widths, which can be attributed to changes in the ionization state of the clouds in response to fluctuations in the ionizing continuum. …”
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Detection of VLF Attenuation in the Earth‐Ionosphere Waveguide Caused by X‐Class Solar Flares Using aGlobal Lightning Location Network by T. S. Anderson, M. P. McCarthy, R. H. Holzworth

“…Abstract Solar flares, energetic particles, and Earth‐impacting coronal mass ejections enhance ionization in the lower ionosphere, inhibiting radio wave propagation in the Earth‐ionosphere waveguide (EIWG). …”
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PHYTOCHEMICAL PROFILE, ANTIOXIDANT AND CYTOTOXIC ACTIVITIES OF LEAF EXTRACT OF Dipteryx lacunifera DUCKE by Krislany A. L. Guedes Araujo, Herbert G. Sousa, João P. da Silva Gomes, Renato Pinto de Sousa, Éverton L. de França Ferreira, Monica T. Pupo, Pedro M. da Silva Costa, Claudia Pessoa, Mahendra Rai, Mariana H. Chaves, Gerardo Magela Vieira Junior

“…In addition, analysis by electrospray ionization-ion trap mass spectrometry (ESI(-)-ITMS) and ultra-performance liquid chromatography coupled with electrospray ionization quadrupole-time-of-flight mass spectrometry (UPLC-ESI-QTOF-MS/MS) annotated twenty-one compounds (1-21), with seventeen of these being reported for the first time in D. lacunifera. …”
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Multidimensional library for the improved identification of per- and polyfluoroalkyl substances (PFAS) by Kara M. Joseph, Anna K. Boatman, James N. Dodds, Kaylie I. Kirkwood-Donelson, Jack P. Ryan, Jian Zhang, Paul A. Thiessen, Evan E. Bolton, Alan Valdiviezo, Yelena Sapozhnikova, Ivan Rusyn, Emma L. Schymanski, Erin S. Baker

“…Using a platform coupling reversed-phase liquid chromatography (RPLC), electrospray ionization (ESI) or atmospheric pressure chemical ionization (APCI), drift tube ion mobility spectrometry (IMS), and mass spectrometry (MS), the retention times, collision cross section (CCS) values, and m/z ratios were determined for all analytes and assembled into an openly available multidimensional dataset. …”
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Quantifying primary oxidation products in the OH-initiated reaction of benzyl alcohol by R. S. Buenconsejo, S. M. Charan, J. H. Seinfeld, J. H. Seinfeld, P. O. Wennberg, P. O. Wennberg

“…Using a gas chromatography in tandem with a chemical ionization mass spectrometer (CIMS) and gas chromatographer with a flame ionization detector (GC-FID), we measure the branching fractions to the major gas-phase oxidation products: hydroxybenzyl alcohol (HBA) and benzaldehyde. …”
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