But Axona, which as been on the market since 2009, might keep healthy brain cells alive longer, says Chief Executive Holger Kunze.

WSJ: 'Medical Foods' and Supplements for Brain Health Advance

The price of silicon, the chief component of photovoltaic cells, is already falling.

ECONOMIST: Clean technology in the downturn

"The fifth base is like a switch - switching on the genes and making cells healthy or diseased, " Alex Olek, the chief executive of Epigenomics, told the BBC.

BBC: RELATED BBC SITES

Nokia execs including Chief Executive Jorma Ollila indicated in the past that fuel cells were a promising area of development, and in 2004 the company demonstrated a handset powered by methanol, and said it could be available commercially by 2006.

FORBES: Ollila: Nokia Drops Fuel Cell Research

The SPS chief executive said he is a "fan of TVs in cells" for prisoners, with "loads of positives that come from that".

BBC: A television in a cell at Barlinnie Prison, Glasgow

Panasonic Energy Company President Naoto Noguchi presented Tesla Chief Technology Officer JB Straubel with the first production Lithium-ion cells manufactured at the new facility.

ENGADGET: Panasonic's 3.1Ah batteries to be used in the Tesla Model S, have highest energy density yet

Qualcomm chief Paul Jacobs talked about addressing the problem by adding a series of ultra-small communications cells, and storage methods, to ease the data load from the overall network.

FORBES: D8's AT&T Hating

Dr Michael Maguire, NI Criminal Justice chief inspector, said the Prison Service had taken action to reduce the risk of suicide in prison cells.

BBC: Report hits out at vulnerable prisoners' regime

At a lunch at One Market in San Francisco, Chris Gronet, a Solyndra founder and then-chief executive, pulled from a case a long cylindrical tube that was coated in thin-film solar cells.

FORBES: What Solyndra's Bankruptcy Means For Silicon Valley Solar Startups