The mobile platform, which allows users to get points by picking out the next big thing in music, has raised $1.8m from backers including AOL.

The classmates reunion online network, which has accumulated seven million users since its beta launch last year, has raised $1.75m in seed capital, with SK Telecom among the backers.

Pasteurization Technology Group, which disinfects and recycles wastewater, has pulled in $1m from a venture fund managed by the chief executive of the Concord Group.

Targovax, developer of a vaccine based on research conducted at a Norsk Hydro-sponsored research institute, raises $2.2m, with a further $1m committed for its next round.

The Gannett-backed family-oriented online organiser provider pulls in $3m as it continues to grow.

US-based MTPV, developer of a semiconductor that transforms waste heat into energy, has closed a $10m series B round, with Applied Materials investing in both tranches.

The Crunchfund is among the seed specialists backing the mobile app-based publishing company as it looks to expand its product offering.

3M, which runs its own water filtration business, is investing in water purification specialist HydroNovation through its corporate venturing division.