I'm happy to see this is about green tea. Although what is this "bag" they speak of?
".... Dr Quan Vuong, a researcher at Australia’s University of Newcastle, is the primary antagonist here.
Back in 2012, he actually looked into microwaving (green) tea and what it would do to the compounds inside the leaves. Based on careful chemical analyses, Vuong’s study concluded that the method above extracted far more nutrients than any other. The actions of Tennant’s fictional detective just brought the paper to light again." -- http://www.iflscience.com/health-and-medicine/best-way-make-tea-microwave-according-science/
official site - http://doi.org/10.1016/j.jfca.2012.06.001 - http://www.sciencedirect.com/science/article/pii/S0889157512000828
available at https://www.researchgate.net/profile/Quan_Vuong2/publication/257273267_Improved_extraction_of_green_tea_components_from_teabags_using_the_microwave_oven/links/541c0e6c0cf2218008c4e3f4.pdf
I'd also found a related paper, Efficient extraction strategies of tea (Camellia sinensis)
biomolecules, http://doi.org/10.1007/s13197-014-1487-3 -- but this paper tut-tuts the value of caffeine. Harumph.
Meanwhile, Zotero, where most content like this is now being recorded, isn't working with the browser plug in to automatically generate the citation record. Harumph.