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Application of thermally assisted high hydrostatic pressure to modify sorghum starch: multi-scale structure, techno-functional properties and digestibility.
J Food Sci Technol
January 2025
Department of Food Engineering and Technology, School of Food Engineering, Universidade Estadual de Campinas (UNICAMP), Monteiro Lobato 80, 6121, Campinas, SP 3083-862 Brazil.
Unlabelled: The effects of high hydrostatic pressure (HHP) (400-650 MPa) and holding temperature (25-50 °C) in thermally assisted HHP processing on multi-scale structure of starch (granule, crystalline and molecular), techno-functional properties, and digestibility of sorghum starch (SS) were evaluated. Response surface methodology has verified that the process impact on the modification of SS was dependent primarily on the pressure level. As HHP increased, processed SS progressively lost their granular structure and Maltese cross, indicating gradual structural disorder within the granules.
View Article and Find Full Text PDFTemperature-Dependent Water Oxidation Kinetics: Implications and Insights.
ACS Cent Sci
January 2025
Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States.
As a vital process for solar fuel synthesis, water oxidation remains a challenging reaction to perform using durable and cost-effective systems. Despite decades of intense research, our understanding of the detailed processes involved is still limited, particularly under photochemical conditions. Recent research has shown that the overall kinetics of water oxidation by a molecular dyad depends on the coordination between photocharge generation and the subsequent chemical steps.
View Article and Find Full Text PDFTime-lag effects of NEP and NPP to meteorological factors in the source regions of the Yangtze and Yellow Rivers.
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Yellow River Institute of Hydraulic Research, Henan Key Laboratory of Yellow Basin Ecological Protection and Restoration, Zhengzhou, China.
Vegetation productivity and ecosystem carbon sink capacity are significantly influenced by seasonal weather patterns. The time lags between changes in these patterns and ecosystem (including vegetation) responses is a critical aspect in vegetation-climate and ecosystem-climate interactions. These lags can vary considerably due to the spatial heterogeneity of vegetation and ecosystems.
View Article and Find Full Text PDFHow grain structure evolution affects the kinetics of a solid-state reaction: a case of interaction between iridium and zirconium carbide.
Phys Chem Chem Phys
January 2025
Institute of Solid State Chemistry and Mechanochemistry SB RAS, 18 Kutateladze st., Novosibirsk 630090, Russian Federation.
This work investigates the solid-state reaction between iridium and zirconium carbide, resulting in the formation of carbon and ZrIr-an intermetallic compound of great interest for modern high-temperature materials science. We have found a transition of kinetic regimes in this reaction: from linear kinetics (when the chemical reaction is a limiting stage) at 1500 and 1550 °C to 'non-parabolic kinetics' at 1600 °C. Non-parabolic kinetics is characterized by the thickness of the product layer being proportional to a power of time less than 1/2.
View Article and Find Full Text PDFWeak Antilocalization and Negative Magnetoresistance of the Gate-Tunable PbTe Thin Films.
J Phys Chem Lett
January 2025
Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China.
We have systematically studied the electromagnetic transport properties of PbTe thin films under gate voltage modulation. The system demonstrates pronounced electron-electron interactions exclusively within the gate voltage range where only hole carriers are present. Furthermore, the Berry phase is utilized to qualitatively elucidate the transition between weak antilocalization (WAL) and weak localization (WL) through the regulation of gate voltage and temperature.
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