Earlier in the year, Stanford university graduates Tim Su, Astrid's co-founder and chief technology officer, and Jon Paris, Astrid co-founder and chief executive, joined the start-up accelerator AngelPad, which was set up by a group of ex-Google executives and has previously seen incubees Crittercism and Shopobot receive Google Ventures backing.

The US internet services firms have paired for at least a second time to back a graduate of the AngelPad accelerator programme along with Kleiner Perkins Caufield & Byers and others.

Cryolife takes a near 20% stake in ValveXchange, sealing at least its second deal related to heart treatments in three months.

The latest funding round by Nokia Growth Partners-backed Summit Microelectronics takes the amount it has raised to at least $21.4m.

The US-based joint venture of General Electric, NRG Energy and ConocoPhillips has signed its first deal outside its home country in Israel.

Robert Bosch Venture Capital linked up with Capricorn and LRM to invest in the Belgian clean-tech company.

Gizmox and Graymatics are the latest cloud computing companies to obtain funding from Citrix.

Alongside AOL Ventures in the Impermium round were venture capital firms Accel Partners, Charles River Ventures, Freestyle Capital, Greylock Discovery Fund and Morado Ventures, and angel investors Archimedes Capital and Embarcadero Ventures.

AMD said it sometimes invested in companies using its Fusion Accelerated Processing Unit (APU) products, understood to include Vivu.