Poppe plots were used for analysis of kinetic efficiency of monolithic sorbents synthesized in quartz capillaries for utilization in high-pressure gas chromatography. Values of theoretical plate time and maximum number of theoretical plates occurred to depend significantly on synthetic parameters such as relative amount of monomer in the initial polymerization mixture, temperature and polymerization time. Poppe plots let one to find synthesis conditions suitable either for high-speed separations or for maximal efficiency. It is shown that construction of kinetic Poppe curves using potential Van Deemter data demands compressibility of mobile phase to be taken into consideration in the case of gas chromatography. Model mixture of light hydrocarbons C1 to C4 was then used for investigation of influence of carrier gas nature on kinetic efficiency of polymeric monolithic columns. Minimal values of theoretical plate times were found for CO2 and N2O carrier gases.
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http://dx.doi.org/10.1016/j.chroma.2013.09.051 | DOI Listing |
Adv Sci (Weinh)
January 2025
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, P. R. China.
Designing and optimizing photocatalysts to maximize the use of sunlight and achieve fast charge transport remains a goal of photocatalysis technology. Herein, a full-spectrum-response BiOBr:Er@BiO core-shell S-scheme heterojunction is designed with [Bi─O] tetrahedral sharing using upconversion (UC) functionality, photothermal effects, and interfacial engineering. The UC function of Er and plasmon resonance effect of BiO greatly improves the utilization of sunlight.
View Article and Find Full Text PDFSmall
January 2025
Department of Chemistry, Indian Institute of Technology Delhi, New Delhi, 110016, India.
Altering the edge sites of 2D MXenes for electrochemical dinitrogen reduction reaction (ENRR) is widely reported, whereas activation of its relatively inert basal planes is neglected. Herein, the activation and the optimization of the basal planes of TiCT (T = *F, *O, and *OH) MXenes toward enhanced ENRR to ammonia is reported. The balanced surface functionalization in TiCT regulates the ENRR kinetics by regulating the potential of zero charge (E) and the electrochemical work function ( ).
View Article and Find Full Text PDFFront Microbiol
December 2024
Department of Epidemiology, School of Public Health, Harbin Medical University, Harbin, China.
Newcastle disease virus (NDV) is an ideal model for exploring the mechanisms of the virus; it is also an optimal vector for developing vector vaccines and for cancer therapy. A reverse genetic system of NDV Mukteswar strain controlled by eukaryotic cellular RNA polymerase II promoter was established by reverse genetics technology. Based on the reverse genetic system, an open reading frame of the enhanced green fluorescent protein (EGFP) gene be inserted between the P and M genes of the viral genome and flanked with the gene start (GS) sequence and gene end (GE) sequence to form an independent transcription unit.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2025
Wenzhou University, College of Chemistry and Materials Engineering, Chashan University Town, 325035, Wenzhou, CHINA.
The heterojunction materials are considered as promising electrocatalyst candidates that empower advanced lithium-sulfur (Li-S) batteries. However, the detailed functional mechanism of heterojunction materials to boost the sulfur redox reaction kinetics remains unclear. Herein, we construct a multifunctional potential well-type Bi2Te3/TiO2 topological insulator (TI) heterojunction with electric dipole domain to elucidate the synergistic mechanism, which facilitates rapid mass transport, strengthens polysulfide capture ability and accelerates polysulfide conversion.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, New Mexico 87131, United States.
Rechargeable Li-CO batteries face challenges of sluggish reaction kinetics and poor rechargeability. Highly efficient electrocatalysts are urgently needed to decompose the discharge product, LiCO. Mn-based transition metal oxides are regarded as promising candidates for improving the cycle performance and reaction kinetics of Li-CO batteries.
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