Results 11 to 20 of about 149,778 (264)

Cosmic Ray Dissociation of Molecular Hydrogen and Dense Cloud Chemistry [PDF]

open access: yesResearch Notes of the AAS, 2020
Abstract Dissociation of molecular hydrogen by secondary electrons produced by cosmic ray or X-ray ionization plays a crucial role in the chemistry of the densest part of molecular clouds. Here we study the effect of the mean kinetic energy of secondary electrons on this process. We compare predictions using a range of secondary electron
Gargi Shaw   +2 more
openaire   +3 more sources

ANALISIS MISKONSEPSI ASAM BASA CALON GURU KIMIA DENGAN METODE THREE-TIER TEST

open access: yesJurnal Pendidikan Sains Universitas Muhammadiyah Semarang, 2020
This study aims to identify the misconceptions of a prospective chemistry teacher. The study population was all students of the Chemistry Study Program at the University of Riau, while the sample was 66 students at the Chemistry Study Program at the ...
Abdullah Abdullah
doaj   +1 more source

Probing electron localization during molecular dissociation by femtosecond strong-field ion momentum spectroscopy

open access: yesCommunications Physics, 2023
The study of molecular valence electron dynamics and their coupling with nuclear motion is one of the frontiers of ultrafast physics and ultrafast chemistry. With time-resolved strong-field ion momentum spectroscopy, we study electron valence and nucleus
Xinning Zhao   +15 more
doaj   +1 more source

Impact of acidity and surface-modulated acid dissociation on cloud response to organic aerosol [PDF]

open access: yesAtmospheric Chemistry and Physics
Acid dissociation of the organic aerosol fraction has the potential to impact cloud-activating properties by altering aqueous-phase H+ concentrations and water activity but is currently overlooked in most atmospheric aerosol models.
G. Sengupta   +3 more
doaj   +1 more source

CO2 Dissociation using the Versatile Atmospheric Dielectric Barrier Discharge Experiment (VADER)

open access: yesFrontiers in Physics, 2014
Dissociation of CO2 is investigated in an atmospheric pressure dielectric barrier discharge (DBD) with a simple, zero dimensional (0-D) chemical model and through experiment.
Michael Allen Lindon, Earl eScime
doaj   +1 more source

Dissociative recombination as primary dissociation channel in plasma chemistry

open access: yesJournal of Physics: Conference Series, 2009
Molecule formation, surface modification and deposition in plasmas can in first order be described as dissociation in the plasma and association of fragments at the surface. In active plasmas ionization and dissociation by electrons is accompanied by excitation.
Schram, D.C.   +3 more
openaire   +1 more source

MENTAL MODEL OF PROSPECTIVE CHEMISTRY TEACHER ON EQUILIBRIUM CONSTANT AND DEGREE OF DISSOCIATION

open access: yesJurnal Kependidikan: Penelitian Inovasi Pembelajaran, 2019
MODEL MENTAL CALON GURU KIMIA PADA KONSEP TETAPAN KESETIMBANGAN DAN DERAJAT DISOSIASI Abstrak Penelitian ini bertujuan untuk mengeksplorasi model mental calon guru kimia pada konsep tetapan kesetimbangan dan derajat disosiasi.
Anggra Prasetya Cahya   +2 more
doaj   +1 more source

The Roasting Marshmallows Program with IGRINS on Gemini South I: Composition and Climate of the Ultrahot Jupiter WASP-18 b

open access: yesThe Astronomical Journal, 2023
We present high-resolution dayside thermal emission observations of the exoplanet WASP-18 b using IGRINS on Gemini South. We remove stellar and telluric signatures using standard algorithms, and we extract the planet signal via cross-correlation with ...
Matteo Brogi   +21 more
doaj   +1 more source

DESVENDANDO REAÇÕES E COLISÕES: COMO A QUÍMICA QUÂNTICA COMPUTACIONAL ASSISTE NO ENTENDIMENTO DAS FRAGMENTAÇÕES NA ESPECTROMETRIA DE MASSAS TANDEM POR COLISÃO [PDF]

open access: yesQuímica Nova
Tandem mass spectrometry (MS/MS) occupies a central position in experimental and analytical sciences, with collision-induced dissociation (CID) standing out as a fundamental technique for investigating molecular structures.
Vinicius Kuchenbecker   +1 more
doaj   +1 more source

Research Progress of Free Radical Chemistry-Tandem Mass Spectrometry for Fine Structure Analysis of Lipids [PDF]

open access: yesZhipu Xuebao
As one of the six major nutrients, lipids play important roles in various biological processes, including cell membrane construction, signal transduction, and energy metabolism.
JIAN Rui-jun, XIA Yu
doaj   +1 more source

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