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Sialyllactose (SL), an acidic oligosaccharide, has immune-protective effects against pathogens and helps with the development of the immune system and intestinal microorganisms. To elucidate the pharmacokinetic characterization after oral administration to rats, the simultaneous quantification method for 3'-SL and 6'-SL in rat plasma was validated, using liquid chromatography-tandem mass spectrometry (LC-MS/MS) in an electrospray ionization (ESI) mode. Several types of columns [C18, amide, and hydrophilic interaction liquid chromatography (HILIC) phase] were used to separate the peaks of 3'-SL and 6'-SL, which improved chromatographic selectivity. Ultimately, the HILIC phase column had a good peak shape and quick resolution, with a mobile phase comprising ammonium acetate buffer and acetonitrile obtained by gradient elution. In addition, the simultaneous quantification of 3'-SL and 6'-SL in rat plasma samples were adequately applied to pharmacokinetic study.
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http://dx.doi.org/10.3390/molecules26041177 | DOI Listing |
Anal Methods
September 2025
Jilin Province Product Quality Supervision and Inspection Institute, Changchun 130103, China.
A method for determination of ten kinds of sweeteners in soybean products by multi-plug filtration cleanup (-PFC) combined with ultra-high-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was established. The sample was extracted with acetonitrile (containing 1% formic acid), degreased by using -hexane liquid-liquid extraction and purified by solid phase extraction using an -PFC column (Oasis PRiME HLB). The analytes were separated by using a Waters ACQUITY UPLC® BEH C (2.
View Article and Find Full Text PDFMagn Reson Med
September 2025
National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland, USA.
Purpose: To achieve spectrally resolved in vivo detection of glutamate, glutamine, and glutathione at 3 T.
Methods: Difference editing of N-acetylaspartate CH protons (NAA-CH) combined with a new echo-time (TE) optimization approach is introduced. Difference editing was used to detect NAA-CH independently of NAA-CH, thereby eliminating systematic errors arising from constrained fitting of the entire NAA molecule.
Research (Wash D C)
September 2025
Molecular Sensing and Imaging Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
O-glycopeptides are highly expressed in various human cancers and play a key role in cancer progression and metastasis, making them promising biomarkers for early diagnostics. However, the inherent complexity and heterogeneity of glycans pose a major challenge for the simultaneous and precise analysis of multiple glycopeptides. Here, we developed a low-temperature nanopore technique capable of simultaneously discriminating 4 truncated O-glycopeptides with varied glycoforms.
View Article and Find Full Text PDFFoot Ankle Int
September 2025
Department of Radiology, School of Medicine, Keio University, Shinjuku-ku, Tokyo, Japan.
Background: Coronal wedge insoles are commonly prescribed to mitigate musculoskeletal disorders, yet their static-standing kinematic and kinetic effects on lower extremity joints remain insufficiently understood.
Methods: This cross-sectional experimental study included 15 healthy older adults (mean 64.9 ± 6.
Anal Chim Acta
November 2025
Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), Universidade Estadual de Campinas (UNICAMP), Rua Pedro Zaccaria 1300, Limeira, 13484-350, São Paulo, Brazil. Electronic address:
Background: Monitoring industrial processes is critical for ensuring consistent product quality, as consumers expect uniformity across different production batches. In the case of herbal extracts, such as rosemary hydroalcoholic extracts, it is essential to control the yield of target compounds to maintain both the expected quality and safety. Typically, these extracts are produced in an extractor and then analyzed separately in a laboratory (offline).
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