The phrasal verb “look up” consists of the verb “look” and the adverbial 'particle' “up.”
There is 'not a particle of' evidence to support their claim.
There is 'not a particle of' truth in what he said.
(..) I said less stained. I just checked the house. There's probably , people in there. - You're kidding. - Is that all? All? In particle physics, is Woodstock. Oh. Well, then, good. I wasn't expecting such a crowd. I'm nervous. - It's okay. Open with a joke, you'll be fine. - Okay, joke. Okay. (..)2008 TvShow: The Big Bang Theory Title: The Cooper-Hofstadter Polarization Season: 1 Episode 9
(..) I said no. Put it down. Hey, Sheldon. Hello, Penny. Get anything good? Just the latest copy of Applied Particle Physics Quarterly. Oh, you know, that is so weird that yours came and mine didn't. It was a joke. Heh-heh. Yup. Tip your waitresses. (..)2008 TvShow: The Big Bang Theory Title: The Cooper-Hofstadter Polarization Season: 1 Episode 9