Not pulling @replies in a search feed

[drupalot]

I've been using advanced search to create feeds from the public
timeline on specific keywords and so forth. One thing I'd like to do
is not pull tweets that are @[username] replies, but not sure how. Is
it possible to append an additional parameter to a feed URL to prevent
pulling @[username] replies, just as its possible to append a
parameter for language, keywords, negative keywords, etc?