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Thermal Behavior of -Octanol and Related Ether Alcohols.
J Chem Eng Data
January 2025
Institute of Physical Chemistry, Technical University Darmstadt, Peter-Grünberg-Straße 8, Darmstadt D-64287, Germany.
The thermal behavior of -octanol and related ether alcohols has been studied by differential scanning calorimetry (DSC). The melting point, heat of fusion, and isobaric heat capacities of -octanol obtained from the DSC measurements are in good agreement with literature values. The ether alcohols display kinetic barriers for forming a solid phase during cooldown.
View Article and Find Full Text PDFIn situ carbon isotopic analyses of magnesium-rich carbonates by LA-MC-ICP-MS at low mass resolution using an iterative isobaric interference correction.
Talanta
April 2025
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China. Electronic address:
Accurate in situ carbon isotopic measurements of magnesium-rich carbonates using LA-MC-ICP-MS require effective correction for isobaric interference, particularly from doubly charged Mg ions that can induce δC deviations of several permil. This study focuses on optimizing gas parameters and developing robust correction strategies to improve the accuracy of δC measurements. Experimental results demonstrate that the introduction of nitrogen gas at a flow rate of 4-6 mL/min effectively doubles signal sensitivity while optimizing low helium (0.
View Article and Find Full Text PDFRounded Turn SLIM Design for High-Resolution Ion Mobility Mass Spectrometry Analysis of Small Molecules.
Anal Chem
December 2024
MOBILion Systems, Inc., 4 Hillman Drive, Suite 130, Chadds Ford, Pennsylvania 19317, United States.
Various rounded turn designs in Structures for Lossless Ion Manipulation (SLIM) were explored via ion trajectory simulations. The optimized design was integrated into a SLIM ion mobility (IM) system coupled with a time-of-flight (TOF) mass spectrometer (MS) for further experimental investigation. The SLIM-TOF IM-MS system was assessed for IM resolution and ion transmission efficiency across a wide / range using various RF frequencies and buffer gas combinations.
View Article and Find Full Text PDFProteomic and metabolomic profiling of aged pork loin chops reveals molecular phenotypes linked to pork tenderness.
J Anim Sci
January 2024
Department of Animal Science, Iowa State University, Ames, IA 50011, USA.
Article Synopsis
- Understanding pork tenderness and quality is complicated due to insufficient knowledge of the molecular factors involved, which this study aims to address through metabolomic and proteomic profiling.
- The research involved analyzing 100 pork chops, aged for about two weeks, categorized by their tenderness using a star probe instrument, to identify differences in protein and metabolite levels.
- Significant variations in the presence of 84 proteins and 22 metabolites were found between the most tender (Category A) and least tender pork chops (Category D), suggesting that tenderness is linked to slower pH decline and changes in muscle proteins.
Dissociation temperature of gas hydrates through isenthalpic-isobaric molecular dynamics simulations.
J Chem Phys
November 2024
Universidade de São Paulo (USP), Departamento de Engenharia Química, Escola Politécnica, São Paulo, São Paulo, Brazil.
Molecular simulations are a powerful tool to understand phenomena and obtain properties of gas hydrate systems. The direct coexistence method (DCM) in the NVT or NPT ensembles, the most commonly used method to determine hydrate dissociation temperatures, can be computationally expensive due to the need for several long simulations. Through an extensive set of simulations, we report here the details of the DCM within the NPH (isobaric-isenthalpic) ensemble, which require fewer and shorter trajectories.
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