[reaction: see text] An orthogonal sulfation strategy involving six different protecting groups has been developed for generating sulfated carbohydrate libraries based on heparan. Chemoselective cleavage conditions (optimized for a heparan disaccharide) can be performed in the presence of sulfate esters as well as the remaining protecting groups.
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http://dx.doi.org/10.1021/ol052130o | DOI Listing |
Nat Genet
January 2025
Institute of Genetic Epidemiology, Faculty of Medicine and Medical Center, University of Freiburg, Freiburg, Germany.
Genetic studies of the metabolome can uncover enzymatic and transport processes shaping human metabolism. Using rare variant aggregation testing based on whole-exome sequencing data to detect genes associated with levels of 1,294 plasma and 1,396 urine metabolites, we discovered 235 gene-metabolite associations, many previously unreported. Complementary approaches (genetic, computational (in silico gene knockouts in whole-body models of human metabolism) and one experimental proof of principle) provided orthogonal evidence that studies of rare, damaging variants in the heterozygous state permit inferences concordant with those from inborn errors of metabolism.
View Article and Find Full Text PDF3D Print Addit Manuf
October 2024
State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, China.
The optimization of slurry content and forming process parameters has a significant effect in slurry microextrusion direct forming method. In this article, magnesium sulfate monohydrate (MgSO) and polyvinylpyrrolidone (PVP) were used as raw materials to prepare the slurry, and the component ratios of the slurry and the optimization of its forming process were discussed. The optimum slurry content is 64 wt.
View Article and Find Full Text PDFJ Vis Exp
October 2024
Research Center on Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, Magna Græcia University of Catanzaro;
J Phys Chem C Nanomater Interfaces
January 2024
Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD USA 20899.
A combination of analytical ultracentrifugation (AUC) and fluorescence spectroscopy are utilized to orthogonally probe compositions of adsorbed surfactant layers on the surface of (7,5) species single-wall carbon nanotubes (SWCNTs) under conditions known to achieve differential partitioning in aqueous two-phase extraction (ATPE) separations. Fluorescence emission intensity and AUC anhydrous particle density measurements independently probe and can discriminate between adsorbed surfactant layers on a (7,5) nanotube comprised of either of two common nanotube dispersants, the anionic surfactants sodium deoxycholate and sodium dodecyl sulfate. Measurements on dispersions containing mixtures of both surfactants indicate near total direct exchange of the dominant surfactant species adsorbed to the carbon nanotube at a critical concentration ratio consistent with the ratio leading to partitioning change in the ATPE separation.
View Article and Find Full Text PDFBull Environ Contam Toxicol
October 2024
School of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China.
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