Mostly my tweets are based on article in veterinary journals about dogs and cats.
The best way to follow my tweets is to periodically (for example weekly) go to my twitter home page and scroll my tweets and rapidly scan the new articles appeared in the veterinary literature.
As I tweet in my spare time, I am not constant: average time is 48 h after the online publication of the journal or of the article; maximum time was 15 days. I tweet also interessant articles in journals that I not regularly follow and they can be older.
To sintetize the content of an scientific article to a 140 characters phrase is a difficult art, so you have always to rely on the article itself for meaning, because the tweets in their shortness are assertive, whereas the scientific articles describe results on an hypothetically basis. I appreciate also, if you give any suggestions about errors, broken links or not comprehensible tweet. Often I use acronyms, but you can find their meanings in this page. If it is an open access article tweet begins with a lower case letter.