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Thermokinetic parameters and transport parameters are of great importance to the combustion model and the reaction rate rules are of great importance to construct the combustion reaction mechanism for hydrocarbon fuels. The HO elimination reaction class for hydroperoxyalkenylperoxy radicals is one of the key reaction classes for olefin, for which the rate coefficients are lacking. Therefore, the rate coefficients and rate rules of the HO elimination reaction class for hydroperoxyalkenylperoxy radicals are studied in this work. The reaction class transition state theory (RC-TST) is used to calculate the rate coefficients. In addition, the HO elimination reaction class of hydroperoxyalkenylperoxy radicals is divided into four subclasses depending upon the type of H-C bond that is broken in the reactant molecules, and the rate rules are calculated by taking the average of rate coefficients from a representative set of reactions in a subclass. The calculated kinetics data would be valuable for the construction of the combustion reaction mechanism for olefin.
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http://dx.doi.org/10.1021/acsomega.2c01811 | DOI Listing |
J Chem Phys
September 2025
Center of Materials and Nanotechnologies (CEMNAT), Faculty of Chemical Technology, University of Pardubice, nam. Cs legii 565, 530 02 Pardubice, Czech Republic.
Joint direct microscopy-calorimetry measurements of crystal growth were performed for a 60 nm amorphous Sb2S3 film deposited either on a Kapton foil or on a soda-lime glass. Calorimetric crystallization proceeded in two steps, originating either from mechanical and stress-induced defects (230-275 °C) or from homogeneously formed nuclei (255-310 °C); both processes exhibited an identical activation energy of 200 kJ mol-1. At temperatures <230 °C, a Sb2O3 crystalline phase formed along the rhombohedral Sb2S3 structure.
View Article and Find Full Text PDFJ Chem Phys
September 2025
Quantum Dynamics Lab, Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar 140001, India.
The interstellar medium (ISM) is a complex and dynamic environment in which molecular collisions play a crucial role. Among these, protonated carbon chains are of great interest due to the presence of a permanent dipole moment and their relevance in describing astrochemical processes, making their detection possible in cold molecular clouds such as TMC-1. C5H+ (1Σg+) is an important molecule for understanding the formation and evolution of carbon-rich environments.
View Article and Find Full Text PDFJ Am Coll Surg
September 2025
Division of Research and Optimal Patient Care, American College of Surgeons, Chicago, IL.
Background: The NSQIP Pediatric Semi-annual report (NSQIP Ped SAR) provides hospitals with risk-adjusted benchmarked results for comparative performance based on 1 year of data. These data are 6 to 18 months old due to requirements for data processing and modeling and this delay potentially limits its usefulness for hospital surgical quality improvement efforts. A timelier reporting mechanism is needed.
View Article and Find Full Text PDFJ Rehabil Assist Technol Eng
September 2025
Department of Rehabilitation Science and Technology, University of Pittsburgh, Pittsburgh, PA, USA.
Minimizing repetitive strain (RS) is a key recommendation from clinical practice guidelines for preservation of upper limb. Propulsion force, which is required to overcome wheel rolling resistance (RR), is a major source of RS. A drum-based RR test method has been developed but has not been directly validated against propulsion forces.
View Article and Find Full Text PDFACS Omega
September 2025
Shandong Provincial Key Laboratory of Oil, Gas and New Energy Storage and Transportation Safety, China University of Petroleum, Qingdao, Shandong 266580, People's Republic of China.
The natural gas pipeline network has a complex topology with variable flow directions, and the supply demand relationships between nodes exhibit cyclical, fluctuating, and time-varying trends. Developing efficient, accurate, and fast intelligent control algorithms is crucial for optimizing the distribution of natural gas networks. Analyzing the operational data from a provincial network over three years revealed that abnormal flow data, such as supply interruptions due to incidents, early fulfillment of supply, and insufficient flow distribution, can cause deviations between the actual transmission volume and the planned transmission volume predicted by the uneven coefficient method.
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