Results 101 to 110 of about 2,465,079 (227)

Characterization of the Pore Environments in Covalent Organic Frameworks by Dynamic Spin Probe Exchange

Small, EarlyView.
Covalent organic frameworks (COFs) with alkyl or triethylene glycol pore linings are probed with water‐dissolved nitroxide radicals using CW EPR spectroscopy. Adsorption affinity, local polarity, and radical concentration inside the pores are quantified, revealing hydrogen bonding, dipolar, and π‐π interactions that govern guest binding, which ...
Sebastian Michler, Simona Bassoli, Luisa Voigt, Makhily Diaby, Dariush Hinderberger, Frederik Haase   +5 more
wiley   +1 more source

Headspace Gas Chromatography Coupled to Mass Spectrometry and Ion Mobility Spectrometry: Classification of Virgin Olive Oils as a Study Case

Foods, 2020
Due to its multiple advantages, ion mobility spectrometry (IMS) is being considered as a complementary technique to mass spectrometry (MS). The goal of this work is to investigate and compare the capacity of IMS and MS in the classification of olive oil ...
María García-Nicolás, Natalia Arroyo-Manzanares, Lourdes Arce, Manuel Hernández-Córdoba, Pilar Viñas   +4 more
doaj   +1 more source

Chiral Bifacial Indacenodithiophene‐Based Hole‐Transport Materials With Chirality‐Induced Spin Selectivity: Chirality‐Spin Polarity Correspondence and Perovskite Passivation

Small, EarlyView.
Homochiral bifacial indacenodithiophene (IDT)‐based hole‐transport materials form amorphous spin‐coated films showing pronounced chirality‐induced spin selectivity (CISS) with spin polarization ≈ 60%, and reveal a robust chirality–spin‐polarity correspondence.
Shuang Li, Fumitaka Ishiwari, Ryosuke Nishikubo, Akinori Saeki   +3 more
wiley   +1 more source

Development of Tandem Ion Mobility Spectrometry with High-voltage Fragmentation Unit at Atmospheric Pressure for Explosives Detection

Zhipu Xuebao
Trace explosive detection is an essential aspect for ensuring public safety. Ion mobility spectrometry (IMS) is an effective technique for detecting explosives and compounds related to explosives.
Kang-yi LIU, Tian-xin XIAN, Ling-feng LI, Yun-jing ZHANG, Xing-li HE, Peng LI   +5 more
doaj   +1 more source

Supramolecular influence on cis–trans isomerization probed by ion mobility spectrometry

, 2016
peer reviewedWe used tandem ion mobility spectrometry measurements to investigate how the photo-isomerization of a chromophore (a methylpyridinium derivative) is affected by the complexation with a crown ether.
Czerwinska, Izabella, Simon, Anne-Laure, De Pauw, Edwin, Choi, Changmin, Choi, Chang Min, Kulesza, Alexander, Kune, Christopher, Chirot, Fabien, Dugourd, Philippe, Far, Johann   +9 more
core   +1 more source

A Ratiometric MRI Probe With a Tuned Crosslinked Network for Quantitative Imaging of Physiological pH

Small, EarlyView.
A ratiometric MRI probe comprising a paramagnetic core and a polymer shell crosslinked with tetraethylene glycol dimethacrylate enables the quantitative imaging of physiological pH. The probe shows pH‐independent r1, while pH‐responsive shell volume changes modulate r2.
Ken Kato, Akira Sumiyoshi, Kyoko Katsumata, Hiroyuki Nakamura, Koichi Kato, Kazuya Kikuchi, Satoshi Okada   +6 more
wiley   +1 more source

A Comparative Study of MALDI MSI Versus DESI MSI Applied to Questioned Document Examination

Rapid Communications in Mass Spectrometry, Volume 40, Issue 19, 15 October 2026.
ABSTRACT Rationale In forensic investigations, questioned document examination (QDE) provides critical information for document authentication and the detection of forgeries. Conventional QDE approaches often require separate analyses of inks and of any potential fingerprints.
Veronika Tibljas, Simona Francese, Marjory Da Costa Abreu, Charlotte Lefebvre, Robert Bradshaw   +4 more
wiley   +1 more source

Real-time monitoring of the work environment using ion-mobility spectrometry

Environmental and Occupational Health Practice
Objectives: Ion-mobility spectrometry (IMS) is a promising system for on-site real-time monitoring of volatile organic compounds (VOCs). Calibration curves derived from shifts in nominal arrival-time spectra of chemical substances relative to those of ...
Kazunari Takaya, Nobuyuki Shibata, Masayoshi Hagiwara, Mitsutoshi Takaya, Shiro Matoba   +4 more
doaj   +1 more source

Enhanced capabilities for imaging gangliosides in murine brain with matrix-assisted laser desorption/ionization and desorption electrospray ionization mass spectrometry coupled to ion mobility separation

, 2016
The increased interest in lipidomics calls for improved yet simplified methods of lipid analysis. Over the past two decades, mass spectrometry imaging (MSI) has been established as a powerful technique for the analysis of molecular distribution of a ...
Ellis, Shane R., Heeren, Ron M. A., Jones, Emrys A., Skraskova, Karolina, Claude, Emmanuelle, Towers, Mark   +5 more
core   +1 more source

Assessment of Sauvignon Blanc Aroma and Quality Gradings Based on Static Headspace-Gas Chromatography-Ion Mobility Spectrometry (SHS-GC-IMS): Merging Analytical Chemistry with Machine Learning [PDF]

, 2020
In this paper, we report on the application of the static headspace-gas chromatography-ion mobility spectrometry (SHS-GC-IMS) instrument in the field of wine aroma analysis and its potential in constructing a prediction model for the quality gradings of ...
Wenyao, Zhu, Frank, Benkwitz, Paul, Kilmartin   +2 more
core   +2 more sources