How to prepare a ten-minute presentation for a PhD interview?
Ten minutes is like "no time at all". You can do very little. However, it is likely that the hiring committee is much more interested in what you will do in the future, related to their general concerns, than what you have done in the past. 

So, I'd suggest you mention, briefly, the past results but stress the work in progress and the possible benefits if it pays off. The committee can explore your past work in publications, of course, but the work in progress and contemplated, needs to come from you. Look to the future, not the past.