1) a vehicle control - как в следующих предложениях

In the second study, 120 female Japanese subjects with facial tanning were assigned to 20f 3 treatments (SPF15 suncreen moisturizer, 2% niacinamide in SPF15 suncscreen moisturizer and a vehicle control).

Secondly, it was found that that supplementation of the aged cell culture with niacinamide produced significant increases in total collagen secreted (by 54%), total protein secreted (by 41%) and also in the number of cells (by 20%), relative to a vehicle control.

2) a culture well

Results indicated firstly that dermal fibroblasts from an aged donor secreted significantly (p<0.05) less collagen than those from a young donor and, furthermore,that NADPH/NADP redox ratios were also lower (p<0.05) in fibroblasts from the aged donor (results were normalised to the cellnumber from the respective culture well).

Очень надеюсь на вашу помощь (только в переводе указанных словосочетаний, предложения только для контекста).

Заранее спасибоаранее спасибо