Northbrook food scientist Norman Singer says it has always been difficult to get new ideas into production. And corporate mergers are making it more so. So for the moment, he’s concentrating less on improving human nutrition here on Earth, and is setting his sights on feeding astronauts. The Highland Park resident, inventor of the Simplesse fat substitute and other food ingredients, says he’s on the way to creating the first truly portable meat, which could nourish astronauts on trips to Mars or living aboard the International Space Station.