Results 1 to 10 of about 388,368 (137)
Frontiers in Marine Science, 2022 We investigated the pore fluid and methane-derived authigenic carbonate (MDAC) chemistry from the ARAON Mounds in the Chukchi Sea to reveal how methane (CH4) seepage impacts their compositional and isotopic properties.
Ji-Hoon Kim +15 more
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A pain-causing and paralytic ant venom glycopeptide
iScience, 2021 Summary: Ants (Hymenoptera: Formicidae) are familiar inhabitants of most terrestrial environments. Although we are aware of the ability of many species to sting, knowledge of ant venom chemistry remains limited.
Samuel D. Robinson +14 more
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Migration of Salt Ions in Frozen Hydrate-Saturated Sediments: Temperature and Chemistry Constraints
Geosciences, 2022 Migration of dissolved salts from natural (cryopeg brines, seawater, etc.), or artificial sources can destabilize intrapermafrost gas hydrates. Salt transport patterns vary as a function of gas pressure, temperature, salinity, etc. The sensitivity of the
Evgeny Chuvilin +5 more
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On basis set optimisation in quantum chemistry [PDF]
ESAIM: Proceedings and Surveys, 2023 In this article, we propose general criteria to construct optimal atomic centered basis sets in quantum chemistry. We focus in particular on two criteria, one based on the ground-state one-body density matrix of the system and the other based on the ...
Cancès Eric +3 more
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MODELLING OF ACIDS AND BASES REVISITED
Studia Universitatis Babes-Bolyai Chemia, 2022 Models for dissociation and mixing of acids and bases are the main subject of many analytical chemistry textbooks. Preparing the solutions for any titration generally involves diluting acids and bases. The mathematics behind precise calculation of pH and
Lorentz JÄNTSCHI
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Liquids, 2023 This work focuses on determining the dissociation constants (pKa) of eight amines, namely, 3-(Diethylamino) propylamine, 1,3-Diaminopentane, 3-Butoxypropylamine, 2-(Methylamino) ethanol, Bis(2-methoxyethyl) amine, α-Methylbenzylamine, 2-Aminoheptane, and
Venkata Sai Priyatham Varma Alluri +2 more
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ANALISIS MISKONSEPSI ASAM BASA CALON GURU KIMIA DENGAN METODE THREE-TIER TEST
Jurnal 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
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Communications 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
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Impact of acidity and surface-modulated acid dissociation on cloud response to organic aerosol [PDF]
Atmospheric Chemistry and PhysicsAcid 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
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Hypervelocity Richtmyer–Meshkov instability [PDF]
, 1997 The Richtmyer-Meshkov instability is numerically investigated for strong shocks, i.e., for hypervelocity cases. To model the interaction of the flow with non-equilibrium chemical effects typical of high-enthalpy flows, the Lighthill-Freeman ideal ...
Meiron, Daniel I., Samtaney, Ravi
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