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Combined experimental and computational study of the reactivity of the methanimine radical cation (HCNH˙) and its isomer aminomethylene (HCNH˙) with propene (CHCHCH).
Phys Chem Chem Phys
September 2024
Department of Physics, University of Trento, Via Sommarive 14, I-38123, Trento, Italy.
The gas phase reactivity of the radical cation isomers HCNH˙ (methanimine) and HCNH˙ (aminomethylene) with propene (CHCHCH) has been investigated by measuring absolute reactive cross sections and product branching ratios, under single collision conditions, as a function of collision energy (in the range ∼0.07-11.80 eV) using guided ion beam mass spectrometry coupled with VUV photoionization for selective isomer generation.
View Article and Find Full Text PDFAmbient ionization mass spectrometry provides screening of selective androgen receptor modulators.
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September 2024
Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic; Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 00, Prague 4, Czech Republic. Electronic address:
Ambient ionization mass spectrometry allows for analysis of samples in their natural state, i.e., with no sample pre-treatment.
View Article and Find Full Text PDFUnraveling the Complexity of DNA Radiation Damage Using DNA Nanotechnology.
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Institute of Chemistry, Hybrid Nanostructures, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany.
Radiation cancer therapies use different ionizing radiation qualities that damage DNA molecules in tumor cells by a yet not completely understood plethora of mechanisms and processes. While the direct action of the radiation is significant, the byproducts of the water radiolysis, mainly secondary low-energy electrons (LEEs, <20 eV) and reactive oxygen species (ROS), can also efficiently cause DNA damage, in terms of DNA strand breakage or DNA interstrand cross-linking. As a result, these types of DNA damage evolve into mutations hindering DNA replication, leading to cancer cell death.
View Article and Find Full Text PDFReactivity of the Ethenium Cation (CH) with Ethyne (CH): A Combined Experimental and Theoretical Study.
Molecules
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Department of Physics, University of Trento, 38123 Trento, Italy.
The gas-phase reaction between the ethyl cation (CH) and ethyne (CH) is re-investigated by measuring absolute reactive cross sections (CSs) and branching ratios (BRs) as a function of collision energy, in the thermal and hyperthermal energy range, via tandem-guided ion beam mass spectrometry under single collision conditions. Dissociative photoionization of CHBr using tuneable VUV radiation in the range 10.5-14.
View Article and Find Full Text PDFPhotoionization of the Propargyl Radical Using the -Matrix Method.
J Phys Chem A
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School of Physics and Electronic Engineering, Xinxiang University, Xinxiang 453003, P. R. China.
The absolute photoionization cross section of the propargyl radical measured by Savee et al. [. .
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