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Sinteza in vrednotenje vonja estrov in etrov metil salicilata = Synthesis and odor evaluation of methyl salicylate esters and ethers : univerzitetni študijski program KozmetologijaMendaš, NušaMetil salicilat ali metil 2-hidroksibenzoat je ester, rastlinskega izvora. Po videzu je pri sobni temperaturi bistra brezbarvna tekočina. Zaradi svojega močnega vonja se uporablja v dekorativni ... kozmetiki, šamponih, toaletnih milih, čistilih ali kot aroma za živila. Dokazano je tudi njegovo protibakterijsko, analgetično in protivnetno delovanje, zato se pogosto uporablja kot lokalna protivnetna ali analgetična učinkovina. Predstavlja glavno sestavino aromatične rastline zelenke (Gaultheria procumbens), iz listov katere pridobivamo eterično olje. Gre za eno bolj nevarnih eteričnih olj, saj se hitro absorbira iz prebavnega trakta in skozi kožo. Draži lahko oči, sluznice, zgornje dihalne poti in kožo, ob zaužitju pa je lahko celo smrtonosno. Vedno bolj priljubljeno postaja sintezno pridobivanje metil salicilata iz salicilne kisline. Namen diplomskega dela je bil sintetizirati derivate metil salicilata in končne produkte olfaktorno vrednotiti s pomočjo prostovoljcev. Želeli smo dobiti čim več hlapnih nizkomolekularnih derivatov s prijetnim vonjem, ki bi jih lahko uporabljali v kozmetični industriji. Reakcije estrenja in etrenja so potekale na prosti fenolni -OH skupini metil salicilata. Uspelo nam je sintetizirati štiri estre in tri etre, njihovo identiteto pa smo potrdili z instrumentalnima metodama: jedrsko magnetno resonanco in infrardečo spektroskopijo. Nastalim derivatom so nato prostovoljci določali prijetnost in jakost vonjev ter navedli tudi asociacije na druge vonje. Večini vzorcev so pripisali prijeten vonj in šibko ali srednje močno jakost. Za najprijetnejše so se izkazali 2-acetoksibenzoat, metil 2-(propioniloksi)benzoat in metil 2-izopropoksibenzoat. S pomočjo rezultatov te analize smo ugotovili, da ima sprememba kemijske strukture močan vpliv na prijetnost in jakost vonja.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [N. Mendaš], 2023Language - slovenianCOBISS.SI-ID - 157167363
Author
Mendaš, Nuša
Other authors
Obreza, Aleš
Topics
Eterična olja |
Tankoplastna kromatografija |
metil salicilat |
sinteza derivatov metil salicilata |
vonjalna analiza |
vonjalna analiza |
kolonska kromatografija
Library | Call number – location, accession no. ... | Copy status |
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Faculty of Pharmacy, Lj. | Knjižnica UNK 665.5 MENDAŠ NUŠA Sinteza 284 IN: 0017689 |
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Mendaš, Nuša | |
Obreza, Aleš | 19061 |
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