What is the fine-grained topic of the following text: Comvita's research, conducted in association with the University of Auckland and Hill Laboratories and published this week by Food Chemistry (Elsevier Ltd), is the culmination of a year-long, intense scientific trial investigation of the bioactivity of Manuka Honey. Only return the topic.
Research on Bioactivity of Manuka Honey by Comvita, University of Auckland and Hill Laboratories