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An aptamer sensor based on AgNPs@MOF for surface-enhanced Raman spectroscopy detection of sulfadimethoxine in food.
Mikrochim Acta
December 2024
State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, 130012, People's Republic of China.
A highly sensitive aptamer sensor (aptasensor) is proposed based on metal-organic frameworks-silver nanoparticles (AgNPs@MOF) to detect sulfadimethoxine (SDM) by surface-enhanced Raman spectroscopy (SERS). AgNPs@MOF with SERS activity was successfully fabricated by synthesizing AgNPs in situ on the surface of MIL-101(Fe), and SDM aptamer and Raman reporter 4-aminophenthiophenol (4-ATP) were selected as specific recognition elements and signal probes, respectively. When SDM was absent, the SDM aptamers were effectively adsorbed on the surface of AgNPs@MOF, thus keeping AgNPs@MOF in a dispersed state, resulting in a weakened SERS signal of 4-ATP.
View Article and Find Full Text PDFVisible Light-Driven Interrupted Barton Reaction: Intermolecular Radical-Relay Sulfonyloximation of Alkenes with DABSO and Alkyl Nitrites.
Org Lett
December 2024
State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China.
A visible light-driven, intermolecular interrupted Barton reaction has been developed for radical-relay sulfonyloximation of alkenes with alkyl nitrites, using DABSO as a trapping reagent. This method overcomes the challenges of competing normal Barton reactions and polarity mismatches by rapidly and irreversibly capturing alkyl radicals, preventing unwanted side reactions. The resulting polarity-reversed sulfonyl radicals undergo highly selective addition to alkenes, yielding α-alkylsulfonyl ketoximes tethered to hydroxyl or ketone groups.
View Article and Find Full Text PDFA highly-sensitive fluorescent probe for the detection of copper ions and its applications in water quality monitoring, neural cell imaging and plant imaging.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China. Electronic address:
High copper levels pose a risk to environmental and human health due to their toxicity and widespread industrial application, in which abnormal copper levels are associated with various diseases both in neurodegenerative diseases and plant growth. Thus, a turn-on fluorescent probe BBYD-Cu, based on donor-acceptor type structure, was designed and synthesized with easy preparations. BBYD-Cu can specifically recognized Cu by 2-picolinic ester group, then released the fluorophore to enhance the fluorescent signals.
View Article and Find Full Text PDFPrediction of total lipids and fatty acids in black soldier fly (Hermetia illucens L.) dried larvae by NIR-hyperspectral imaging and chemometrics.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, Brazil. Electronic address:
The unique fatty acid composition of BSF larvae oil makes it suitable for various applications, including use in animal feed, aquaculture, biodiesel production, biomaterials, and the food industry. Determination of BSF larvae composition usually requires analytical methods with chemicals, thus needing emerging techniques for fast characterization of its composition. In this study, Near Infrared Hyperspectral Imaging (NIR-HSI) (928 - 2524 nm) coupled with chemometrics was applied to predict the lipid content and fatty acid composition in intact black soldier fly (BSF) larvae.
View Article and Find Full Text PDFConstitutively active receptor ADGRA3 signaling induces adipose thermogenesis.
Elife
December 2024
Shenzhen Key Laboratory of Systems Medicine for inflammatory diseases, School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Sun Yat-Sen University, Shenzhen, China.
The induction of adipose thermogenesis plays a critical role in maintaining body temperature and improving metabolic homeostasis to combat obesity. β3-adrenoceptor (β3-AR) is widely recognized as a canonical β-adrenergic G-protein-coupled receptor (GPCR) that plays a crucial role in mediating adipose thermogenesis in mice. Nonetheless, the limited expression of β3-AR in human adipocytes restricts its clinical application.
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