Trace elements in human nutrition
A serendipitous observation, confirmed by recent reports of ice XIc, suggested ice crystallizing in liquid nitrogen is proton ordered. It undergoes a ferroelectric phase transition at 72 K, releasing latent energy as wavelength λ ~ 4μ infrared laser light. Ice formed in polar regions during a primordial ice age emitted such light; polarised by multiple reflection it photophosphorylated deoxynucleotides on equatorial waters, creating chiral ‘transport DNA’, tDNA. tDNAs embedded in the membranes of proto-cells charged by lightning formed H-bond lined pores.