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Pregled bibliografske jedinice broj: 872718

Zbornik radova

Autori: Stanković, Anamarija; Kontrec, Jasminka; Njegić Džakula, Branka; Maltar-Strmečki, Nadica; Lyons, Daniel Mark; Marković, Berislav; Kralj, Damir
Naslov: The influence of amino acids relevant for pathological biomineralization on the precipitation of calcium oxalate monohydrate
( The influence of amino acids relevant for pathological biomineralization on the precipitation of calcium oxalate monohydrate )
Izvornik: Book of abstracts, 25th Croatian Meeting of Chemists and Chemical Engineers (25HSKIKI), Poreč, 19.-22. 04. 2017. / Šantić, Ana ; Đaković, Marijana (ur.). - Poreč : HKD/CCS , 2017. 197-197.
Skup: 25th CROATIAN MEETING OF CHEMISTS AND CHEMICAL ENGINEERS with international participation 3rd symposium “VLADIMIR PRELOG”
Mjesto i datum: Poreč, Hrvatska, 19-22.04.2017.
Ključne riječi: pathologic biomineralization, calcium oxalate monohydrate, amino acids
( pathologic biomineralization, calcium oxalate monohydrate, amino acids )
Sažetak:
Urolithiasis, a form of pathologic biomineralization, is a disease which causes the formation of urinary stones in different parts of kidney or bladder. Recently, increasing number of kidney stones in industrial countries is observed and the interest of scientists to explain their pathogenesis with a special focus on calcium oxalate stones is renewed. Calcium oxalates crystallize in the form of hydrated salts: thermodynamically stable calcium oxalate monohydrate (COM, CaC2O4·H2O, whevellit) and metastable dihydrate (COD, CaC2O4·2H2O, weddellit), and trihydrate (COT, CaC2O4·3H2O). The kidney stones formation under biological conditions can be triggered by various metabolic disorders such as: hipercalciuria, hypocitraturia, hiperoxaluria, and the change in the urine acidity. The mechanisms and the conditions under which they crystallize are still not completely clarified. In this work, the spontaneous precipitation and characterization of calcium oxalate monohydrate under conditions of hiperoxaluria is reported. The experiments were conducted in a simple model system and with the addition of amino acids reportedly important for pathologic biomineralization. The precipitations were carried out with solutions ci(Ca2+) = 7.5 x 10- 3 mol dm-3 and ci(C2O42-) = 6.0 x 10-3 mol dm- 3. The amino acids selected for the addition are often found in the urine of healthy people and in the organic matrix which is an integral part of kidney stones. The reactant solutions were mixed under controlled hydrodynamic and thermodynamic conditions. Changes in the composition and morphology of precipitated calcium oxalate monohydrate were observed by means of PXRD, EPR, SEM, IR and TGA.
Vrsta sudjelovanja: Poster
Vrsta prezentacije u zborniku: Sažetak
Vrsta recenzije: Domaća recenzija
Izvorni jezik: eng
Kategorija: Znanstveni
Znanstvena područja:
Fizika,Kemija
Puni text rada: 872718.SKIKI-2017__Book_of_abstracts.pdf (tekst priložen 28. Tra. 2017. u 11:03 sati)
Upisao u CROSBI: Anamarija Ster (aster@kemija.unios.hr), 28. Tra. 2017. u 11:03 sati



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