I urge everyone to bookmark that blog; it is always a fascinating tour of the weirder and wonderfuller places on our planet. And let me leave you with this simply jaw-dropping video of undulatus asperatus in action.
(A sunscreen with a physical block like titanium dioxide or zinc oxide can be applied last, after a serum or moisturizer.) Apply a serum next and, finally, moisturizer if you need it. Polis also recommends serums or sunscreens with moisturizers built in because they save time.
Clot activator tube for serum determinations in chemistry testing. ensure mixing of clot activator with blood and clotting within 60 minutes. blood and allow blood to clot upright for 30 minutes before centrifuging for 10 minutes. Serum must be removed after spinning.