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Characterization of main degradation products from dendrobine under stress conditions by multistage cleavage of UPLC-ESI-IT-TOF.
J Pharm Biomed Anal
January 2025
Department of Pharmaceutical Analysis, School of Pharmacy, Guizhou Medical University, Gui'an New District, Guizhou 561113, PR China. Electronic address:
Dendrobine is a sesquiterpene alkaloid primarily used in the treatment of inflammatory diseases, immune system disorders, and conditions related to oxidative stress. To understand the possible degradation pathways of dendrobine for its quality control, we conducted an in-depth investigation of its degradation products using forced degradation methods. The separation of dendrobine and its degradation products was achieved on a Shim-pack XR-ODS III (75 mm × 2 mm, 1.
View Article and Find Full Text PDFTetraarylphosphonium Cations with Excellent Alkaline-Resistant Performance for Anion-Exchange Membranes.
ChemSusChem
December 2024
Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Institute of Science Tokyo, Nagatsuta-cho 4259-G1-9, Midori-ku, Yokohama, 226-8501, Japan.
To realize the robust anion exchange membrane (AEM)-based water splitting modules and fuel cells, the design and synthesis of tetraarylphosphonium (TAP) cations are described as a new class of cationic building blocks that exhibit remarkable alkaline stability under harsh conditions. TAP cations with highly sterically demanding aromatic substituents were efficiently synthesized from triarylphosphine derivatives and highly reactive arynes, whose alkaline degradation proved to be suppressed dramatically by the sterically demanding substituents. In the case of bis(2,5-dimethylphenyl)bis(2,4,6-trimethylphenyl)phosphonium, for example, approximately 60% of the cation survived for 27 d under the forced conditions (i.
View Article and Find Full Text PDFEffects of NUSS surgery on degree of flat thoracic cage, cardiopulmonary function, and bone metabolism in pectus excavatum patients of different ages.
Updates Surg
December 2024
Department of Thoracic Surgery, Children's Hospital of Hebei Province, Shijiazhuang, 050000, Hebei, China.
This study was to explore the degree of flat thoracic cage (FTC), cardiopulmonary function, and bone metabolism of pectus excavatum (PE) children of different ages after NUSS surgery. A retrospective analysis was conducted on 90 children with PE who underwent minimally invasive pectus excavatum correction surgery (NUSS), divided into three age groups: group I (1-3 years), group II (3-6 years), and group III (6-12 years), with 30 patients in each group. The study compared differences in thoracic flattening index, surgical-related metrics, pulmonary function, peripheral blood levels of alkaline phosphatase (ALP), calcium, magnesium, zinc, and phosphorus, and complication rates among the groups.
View Article and Find Full Text PDFStudy on the hydrolysis characteristics of polymeric aluminum chloride forced by fine bubbles and its key factors affecting the efficiency and capacity of forcing hydrolysis.
Water Res
January 2025
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an 710055, China. Electronic address:
Article Synopsis
- * The study demonstrated how fine bubbles can influence the hydrolysis process of PACl under varying conditions, utilizing changes in aluminum species to enhance coagulation efficiency.
- * Experimental findings indicated that fine bubble characteristics, such as mass transfer efficiency and concentration, significantly impact their ability to improve PACl hydrolysis and, subsequently, the removal of organic pollutants from water.
Frequency and amplitude dependence of nuclear displacement and phase delay in mechanical vibrations for determining cellular natural frequency.
J Biomech
December 2024
Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan. Electronic address:
Cultured cells biochemically respond to mechanical vibrations. However, the mechanisms of sensing mechanical vibrations and transducing biochemical responses remain unclear. A previous study reported that the expression of the alkaline phosphatase gene of osteoblastic cell under mechanical vibrations peaks at 50 Hz, which seems like a resonance curve in the mechanical vibration theory.
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