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    Recovery of Polysaccharides from Red Grape Marc and White Grape Pomace by Degradation of Cell Walls by Enzymes with Different Activities by Ekhiñe Garaigordobil, Leticia Martínez-Lapuente, Zenaida Guadalupe, Silvia Pérez-Magariño, Belén Ayestarán

    Published 2025-01-01
    “…Four different doses per enzyme were used, with tartaric acid as solvent and L/S ratios of 1.3/1 and 4/1 for 24 h at 20 °C, compared with a control. The highest dose of enzyme E1, polygalacturonase + pectin lyase + pectin-methyl-esterase (with the highest activity) was the most effective in the degradation of high and medium molecular weight PS. …”
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    Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions by Youssef O Al-Ghamdi, Khalid A Alamry, Mahmoud A Hussein, Hadi M Marwani, Abdullah M Asiri

    Published 2019-03-01
    “…The β-ketosulfone derivative, namely 1–(4-bromophenyl)-2-(phenylsulfonyl)ethanone, was first prepared by treatment of the corresponding phenacyl bromide with a sufficient amount of sodium benzene sulfinate; its chemical structure was confirmed by spectral analyses, including Fourier transform infrared spectroscopy, 1 H-NMR, 13 C-NMR, and mass spectrometry. Then, sulfone-modified chitosan/5–20 derivatives were synthesized by the interaction of chitosan with a freshly prepared p-bromo-β-ketosulfone derivative in a mildly acidic aqueous solution using the solution-blending technique. …”
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