Sustained hydrogen production is obtained by the culturing of a genetically-modified algae, where the ability of the chloroplasts to intake sulfate is reduced or eliminated compared to wild-type algae. The object contains an electronic memory inside of which the item of identification information is stored. The copper precursor is in the form of a CuCl or CuBr composition in a nonaromatic, nonplanar and heteroatom-free liquid organic solvent which exhibits at least two nonconjugated unsaturations. Certain applications involve capillary implantation over weeks, months or longer.