hydrothermal synthesis hydrothermal treatment hydrothermal vent hydrothermal vents hydrotreated light hydrotreater hydrotreating hydrotrope hydrotropes hydrous magnesium hydroxamate hydroxamic hydroxamic acid hydroxamic acids hydroxide hydroxide adjuvant hydroxide and sodium hydroxide and water hydroxide aqueous hydroxide aqueous solution hydroxide can hydroxide gel hydroxide ion hydroxide ions hydroxide monohydrate hydroxide or potassium hydroxide or sodium hydroxide particles hydroxide pellets hydroxide powder hydroxide solution hydroxide to ph hydroxide was added hydroxides hydroxocobalamin hydroxy hydroxy acid hydroxy acids hydroxy carboxylic hydroxy compound hydroxy compounds hydroxy groups hydroxy propyl hydroxy substituted hydroxy-functional hydroxy-terminated hydroxyalkyl group hydroxyalkyl groups hydroxyapatite hydroxyapatite chromatography hydroxybutyl hydroxybutyrate hydroxycarboxylic acid hydroxycarboxylic acids hydroxychloroquine hydroxycitric acid hydroxycut hydroxyethyl hydroxyethyl acrylate hydroxyethyl cellulose hydroxyethyl methacrylate hydroxyethyl starch hydroxyethylcellulose hydroxyl hydroxyl content hydroxyl equivalent hydroxyl function hydroxyl functional hydroxyl functional groups hydroxyl functionality hydroxyl group hydroxyl groups hydroxyl groups per molecule hydroxyl ions hydroxyl number hydroxyl protecting hydroxyl protecting group hydroxyl protecting groups hydroxyl radical hydroxyl radicals hydroxyl terminated hydroxyl value hydroxyl-containing hydroxylamine hydroxylamine hydrochloride hydroxylamine sulfate hydroxylapatite hydroxylase hydroxylated hydroxylation hydroxyls hydroxymethyl hydroxymethyl group hydroxyproline hydroxypropyl hydroxypropyl cellulose hydroxypropyl guar hydroxypropyl methyl hydroxypropyl methylcellulose