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An overloaded pure silica zeolite ISV synthesized using a phosphonium cation.
Dalton Trans
January 2025
Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Madrid, Spain.
A pure silica zeolite with structure was synthesized using the tricyclopentylmethylphosphonium (CpMP) cation under fluoride media. Analysis of the organic content in the zeolite suggested the presence of more than four cations per unit cell, while fluoride anions were exclusively located in the four double four-membered rings of the structure. Si solid-state NMR demonstrated a significant concentration of Si species, , S̲i̲(OSi)(OH), in the structure, which afforded charge balance but contrasted with the most common observation of defect-free pure silica zeolites prepared in fluoride media at near-neutral pH.
View Article and Find Full Text PDFTannic Acid Modulates Voltage-gated K+ Channels to Promote Neuritogenesis in Neuronal N2A Cells.
J Physiol Investig
January 2025
Department of Physiology, China Medical University, Taichung, Taiwan.
In a previous report, we showed that voltage-gated K+ (Kv) Kv1 and Kv2 channels are involved in cAMP-induced neuritogenesis of mouse neuronal N2A cells. In this report, we examined the effects of tannic acid (TA) on Kv channels and neuritogenesis in N2A cells. TA (15 μM) mildly enhanced Kv currents at -30 to -20 mV but strongly inhibited Kv currents at higher voltages, causing a preferential activation of currents at low voltages.
View Article and Find Full Text PDFBased on theoretical design simultaneous analysis of multiple neonicotinoid pesticides in beeswax by deep eutectic solvents extraction combined with UHPLC-MS/MS.
Food Chem X
January 2025
State Key Laboratory of Resource Insects, Institute of Apiculture Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China.
Beeswax, an FDA-approved component, has been extensively applied in feed, pharmaceutical, and food industries. The occurrence of neonicotinoid pesticides in beehive systems and their residues in beeswax have caused safety risks. Therefore, establishing a detection method for neonicotinoid pesticide residues in beeswax is crucial for ensuring its quality.
View Article and Find Full Text PDFVasorelaxant effect of fennel seeds (Foeniculum vulgare Mill) extracts on rat mesenteric arteries: Assessment of phytochemical profiling and antioxidant potential.
Fitoterapia
December 2024
Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health. Faculty of Sciences, Mohammed First University, Oujda, BP-717, 60000 Oujda, Morocco. Electronic address:
Ethnopharmacological Relevance: Hypertension is a serious health problems and a leading cause of adult mortality worldwide. Foeniculum. vulgare Mill, a plant traditionally used for various ailments, including cardiovascular disorders such as hypertension.
View Article and Find Full Text PDFSubmicromolar fluorescence 'turn-on' detection of fluoride anions using -(tetra-aryl) calix[4]pyrrole.
Org Biomol Chem
January 2025
Kangwon National University, Chun Cheon 24341, Korea.
-(tetra-aryl) picket calix[4]pyrrole 1 featuring -fluorophenyl groups at all four -positions in a -configuration has been synthesized and characterized unambiguously using single-crystal X-ray diffraction analysis. This pre-organized system possesses a deep binding pocket created by the four aryl groups so that anions can be accommodated through anion-π interactions and four-point N-H⋯anion hydrogen bonds. Single-crystal X-ray diffraction analysis of the CsF and TEAF (TEA = tetraethylammonium) complexes of receptor 1 unequivocally confirms the formation of 1 : 1 complexes, revealing the binding modes in the solid state.
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