Please use this identifier to cite or link to this item: https://open.uns.ac.rs/handle/123456789/27656
Title: Ispitivanje uticaja molekulske strukture na lipofilnost žučnih kiselina
Research of the influence bile acids’ structure on their lipophilicity
Authors: Пилиповић Ана
Keywords: Žučne kiseline i soli; hromatografija, visoko efikasna, tečna; kvantitativan odnos strukture i aktivnosti, hidrofobne i hidrofilne interakcije.;Bile Acids and Salts; Chromatography, High Pressure Liquid; Quantitative Structure- Activity relationship; Hydrophobic and Hydrophilic Interactions
Publisher: Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu
University of Novi Sad, Faculty of Medicine at Novi Sad
Abstract: <p style="text-align: justify; ">Žučne kiseline, kao amfifilni molekuli pokazuju&nbsp;specifične osobine zbog čega predstavljaju interes&nbsp;proučavanja brojnih autora. U velikom broju studija&nbsp;je dokazana povezanost hromatografski dobijenog&nbsp;retencionog faktora molekula i njegove lipofilnosti.&nbsp;Lipofilnost molekula, kao značajna osobina na&nbsp;biofarmaceutskog stanovi&scaron;ta je zbog toga&nbsp;postavljena kao ključni parametar koji se koristi u&nbsp;QSAR ispitivanjima. za postavljanje matematičkih&nbsp;modela. Ovaj rad je podeljen na tri dela, sa sledećim&nbsp;podnaslovima: hromatografski retencioni faktor kao&nbsp;merilo hidrofobnosti žučnih kiselina, uticaj&nbsp;elektrolita na hidrofobnost žučnih kiselina kao i&nbsp;modelovanje particionog koeficijenta probnog&nbsp;molekula (nitrazepama) u micele žučnih kiselina uz&nbsp;pomoć temperaturne zavisnosti retecionog indeksa&nbsp;žučnih kiselina. Retencioni koeficijent žučnih&nbsp;kiselina dobijeni hromatografijom pokazali su se&nbsp;kao veoma pogodni za opisivanje pona&scaron;anja žučnih&nbsp;kiselina u eksperimentima gde dolazi do izražaja&nbsp;promena odnosa hidrofobne i hdrofilne povr&scaron;ine&nbsp;steroidnog skeleta i postavljen je i matematički&nbsp;model za particioni koeficijent probnog molekula&nbsp;(nitrazepama) u micele žučnih kiselina na različitim&nbsp;temperaturama.</p>
<p>Bile acids, as amphiphiles posess specific features of the great interest for researchers. Connection between chromatografically obtained retention index and bile acids&#39; lipophilicity is proven in a lot of studies. Lipophilicity is important feature of one molecule accoding to biopharmaceutical aspect and that is why it is chosen as a main parameter in QSAR studies for deriving mathematical models. This work is divided in three parts: chromatographic retention factor as a measure of bile acids&#39; hydrophobicity, influence of electrolytes on bile acids&#39; hydrophobicity, and modeling of partition coefficients of the probe molecule (nitrazepam) in bile acids&#39; micelles using temperature dependence of bile acids on retention coefficient. Retention coefficients of bile acids obtained using chromatography is shown to be convinient for describing behavior of bile acids especially in experiments in which the change of the ratio between hydrophobic and hydrophilic surface of the steroid sceleton is important. Mathematical model is derived for partition coefficient of the probe molecule (nitrazepam ) in bile acids micelles on different temperatures.</p>
URI: https://open.uns.ac.rs/handle/123456789/27656
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