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- W2895071916 abstract "PolycyklickĂŠ aromatickĂŠ uhlovodĂky (PAU) pĹedstavujĂ skupinu vĂ˝znamnĂ˝ch kontaminantĹŻ pracovnĂho i ĹživotnĂho prostĹedĂ. PĹi expozici PAU v pracovnĂm prostĹedĂ se vedle inhalaÄnĂ expoziÄnĂ cesty mĹŻĹže vĂ˝znamnÄ uplatĹovat i expozice dermĂĄlnĂ. StĂĄvajĂcĂ experimentĂĄlnĂ Ăşdaje o intenzitÄ a rychlosti penetrace lĂĄtek do systĂŠmovĂŠ cirkulace jsou zatĂm omezenĂŠ. PĹedklĂĄdanĂ˝ ÄlĂĄnek se zabĂ˝vĂĄ metodickou a interpretaÄnĂ problematikou transepidermĂĄlnĂ absorpce PAU in vitro. Byla sledovĂĄna intenzita (Flux) a rychlost (Lag time) penetrace naftalenu, fenanthrenu, pyrenu a benzo[a]pyrenu pĹes epidermĂĄlnĂ membrĂĄnu z praseÄĂho boltce. Experiment byl provĂĄdÄn ve vertikĂĄlnĂch statickĂ˝ch difuznĂch komĹŻrkĂĄch dle Franze (n = 32) a jako rozpouĹĄtÄdlo byl pouĹžit isopropyl-myristĂĄt. Parametr Flux (nmol/cm2/hod) dosĂĄhl hodnot 95,7 ± 45,5 u naftalenu, 19,5 ± 8,7 u fenanthrenu, 4,38 ± 1,98 u pyrenu a 0,21 ± 0,08 u benzo[a]pyrenu. Parametr Lag time (hod) hodnot 0,26 ± 0,17 u naftalenu, 2,12 ± 0,41 u fenanthrenu, 3,25 ± 0,50 u pyrenu a 11,2 ± 4,08 u benzo[a]pyrenu. Hodnota parametru Flux klesala s molĂĄrnĂ hmotnostĂ PAU, zatĂmco hodnota parametru Lag time s molĂĄrnĂ hmotnostĂ PAU stoupala. MnoĹžstvĂ PAU, kterĂŠ za danĂ˝ ÄasovĂ˝ Ăşsek penetrovalo pĹes epidermĂĄlnĂ membrĂĄnu, se pohybovalo mezi 0,24 % (benzo[a]pyren) aĹž 0,84 % (fenanthren) aplikovanĂŠ dĂĄvky. Penetrace PAU pĹes epidermĂĄlnĂ membrĂĄnu vykazovala, v porovnĂĄnĂ s experimenty na plnĂŠ kĹŻĹži, niŞťà stupeĹ variability dat. Z vĂ˝sledkĹŻ vyplĂ˝vĂĄ, Ĺže pouĹžitĂ epidermĂĄlnĂ membrĂĄny by mohlo zpĹesĹovat jak odhad vnitĹnĂ dĂĄvky PAU po dermĂĄlnĂ expozici, tak i odhad souvisejĂcĂho zdravotnĂho rizika v rĂĄmci konzervativnĂho expoziÄnĂho scĂŠnĂĄĹe. Experimenty s epidermĂĄlnĂ membrĂĄnou jsou vĹĄak ÄasovÄ i experimentĂĄlnÄ nĂĄroÄnĂŠ, bez moĹžnosti objektivnĂ kontroly integrity epidermĂĄlnĂ membrĂĄny, coĹž mĹŻĹže vĂŠst k finanÄnĂ nĂĄroÄnosti testovĂĄnĂ, ztrĂĄtĂĄm vzorkĹŻ a v neposlednĂ ĹadÄ i k nĂĄrĹŻstu rozdĂlĹŻ hodnot dat, zĂskanĂ˝ch v rĹŻznĂ˝ch laboratoĹĂch." @default.
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- W2895071916 date "2018-09-30" @default.
- W2895071916 modified "2023-10-16" @default.
- W2895071916 title "Trans-epidermal absorption of polycyclic aromatic hydrocarbons" @default.
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- W2895071916 doi "https://doi.org/10.21101/hygiena.a1700" @default.
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