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The suitability of transepidermal water loss (TEWL) measurements in vitro as a barrier integrity test for human heat separated epidermis (HSE) was investigated. A model system consisting of a Teflon membrane mounted in Franz diffusion cells (FDC) filled with phosphate buffer saline (PBS) was set up. The membrane was used intact and punctured with a needle (up to five holes). After each puncturing...
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