Recently, I published an article about Sage (salvia officinalis), I hope it will be useful to you. please read it with an eye to lipid peroxidation- TBRS (MDA).
i know rosmeric acid just like other bioactive compounds is affected by temperature. most of the research i know is on convective drying may be they might be useful. you can google the following
1. Kinetics of change in colour and rosmarinic acid equivalents
during convective drying of lemon balm (Melissa officinalis L.)
Dimitrios Argyropoulos , Joachim Mu¨ ller
2. Capeska E, Mareczek A, Leja M, 2005. Antioxidant activity of fresh and dry
herbs of some Lamiaceae species. Food Chemistry 93, 223–226.
3.Yukizaki C, Sakai M, Kosaka T, Dozono M, Sakono M, Fukuda N, 2008.
Effects of drying temperature on antioxidant activity of lemon balm