platinum, tungsten, tantalum, some carbides and nitrides, etc.) the extremely high melting point (typically considered to be above, say, 1,800 C) may be determined by heating the material in a black body furnace and measuring the black-body temperature with an optical pyrometer
Crucially, this worked at extremely low concentrations picomolar to nanomolar suggesting high biological potency
Battula VL, Le P, Sun J, Benton C, McQueen T, Shpall E, Bueso-Ramos C, Konopleva M, Andreeff M
Avakh A, Grant GD, Cheesman MJ, Kalkundri T, Hall S
Clinical data clearly demonstrate that liposomal glutathione significantly improves cellular delivery, biological activity, and systemic bioavailability compared to conventional glutathione [2]