Problem: Add spaces: Furthermore,theyhavetofeatureextrememechanicaldurability.

Spaces added: Furthermore, they have to feature extreme mechanical durability.

Problem: Add spaces: Oilshavebeenshowntohaveawidevarietyofimportantactivity,fromanti-viral,antibacterialandanti-fungal,toanti-anxietyandanti-depressant.

Spaces added: Oils have been shown to have a wide variety of important activity, from anti-viral, antibacterial and anti-fungal, to anti-anxiety and anti-depressant.

Problem: Add spaces: Stayaliveforaslongaspossible.

Spaces added: Stay alive for as long as possible.

Problem: Add spaces: Thatcaneitherbeiftheredonotexistrefinedquantitativemethodsorifthedataarenotsufficientlyaccurate.

Spaces added:
That can either be if there do not exist refined quantitative methods or if the data are not sufficiently accurate.