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undergraduate thesis
POtenciometrijska karakterizacija interakcije amiloze i heksadecil - trimitil amonijevog bromida
2015. urn:nbn:hr:182:287160
Stupar, Natalija
Josip Juraj Strossmayer University of Osijek
Department of Chemistry

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Stupar, N. (2015). POtenciometrijska karakterizacija interakcije amiloze i heksadecil - trimitil amonijevog bromida (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:287160

Stupar, Natalija. "POtenciometrijska karakterizacija interakcije amiloze i heksadecil - trimitil amonijevog bromida." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2015. https://urn.nsk.hr/urn:nbn:hr:182:287160

Stupar, Natalija. "POtenciometrijska karakterizacija interakcije amiloze i heksadecil - trimitil amonijevog bromida." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2015. https://urn.nsk.hr/urn:nbn:hr:182:287160

Stupar, N. (2015). 'POtenciometrijska karakterizacija interakcije amiloze i heksadecil - trimitil amonijevog bromida', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 29 October 2024, https://urn.nsk.hr/urn:nbn:hr:182:287160

Stupar N. POtenciometrijska karakterizacija interakcije amiloze i heksadecil - trimitil amonijevog bromida [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2015 [cited 2024 October 29] Available at: https://urn.nsk.hr/urn:nbn:hr:182:287160

N. Stupar, "POtenciometrijska karakterizacija interakcije amiloze i heksadecil - trimitil amonijevog bromida", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2015. Available at: https://urn.nsk.hr/urn:nbn:hr:182:287160

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TitlePOtenciometrijska karakterizacija interakcije amiloze i heksadecil - trimitil amonijevog bromida
Title (english)Potentiometric Characterisation of Amylose and Hexadecile - Trimethyl Ammonium Bromide Interaction
AuthorNatalija Stupar
MentorNikola Sakač (mentor)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
Osijek
Defense date and country2015-09-17, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Amiloza je linearni prirodni polimer koji sudjeluje u izgradnji škroba. To je nerazgranati oblik škroba koji se sastoji od glukoznih jedinica povezanih α-1,4-glikozidnim vezama. Helikalna struktura amiloze može sadržavati hidrofobnu dodirnu površinu, stvarajući tako šupljinu pogodnu za stvaranje inkluzijskog kompleksa. Tenzidi imaju važnu ulogu u mnogim praktičnim primjenama i u sastavu su mnogih proizvoda. Koriste se u kemijskoj, farmaceutskoj i kozmetičkoj, prehrambenoj, naftnoj i drugim industrijama. Tenzidi ili površinski aktivne tvari su organski spojevi koji se sastoje od hidrofilne skupine i od hidrofobne dugolančaste ugljikovodične skupine. Potenciometrijskom titracijom otopina amiloze (0; 0.1; 0.5; 1; 2 i 4%) s HTAB - heksadecil-trimetil amonijevim bromidom (4 x 10-3 moldm-3) pratilo se stvaranje inkluzijskog kompleksa, što je rezultiralo pomakom kritične micelarne koncentracije. Nastajanje inkluzijskog kompleksa amiloze s HTAB događa se tako da ugljikovodični lanac tenzida ugrađuje se u helikalnu strukturu amiloze. Korištene elektrode tijekom eksperimenta su srebro/srebrov klorid (Metrohm) kao referentna elektroda i tenzidna elektroda s plastificiranom PVC membranom vlastite izradbe.
Abstract (english)
Amylose is linear polymer that contributes to the construction of starch . It is straight form of starch which contains glucose units connected with (α-1,4-glycosidic) bonds. Helical structure of amylose may contain hydrophobic contact area, creating cavitysuitable for creation of inclusion complex. Surfactants play an important role in many practical applications and are part of many products . They are used in chemical, pharmaceutical, cosmetic, food, oil industry etc. Surfactants or surface active agents are organic compounds comprising the hydrophilic groups and hydrophobic long chain hydrocarbon groups. The formation of the inclusion complex was followed by potentiometric titration of amylose (0 ; 0.1 ; 0.5 ; 1 ; 2 and 4%) with hexadecyl – trimethyl ammonium bromide ( 4 x 10-3 mol dm- 3) resulting in a shift of the critical micelle concentration. The formation of the inclusion complex with amylose HTAB occurs so that hydrocarbon chain cationic surfactant HTAB can be incorporated into a helix of amylose. Electrodes used during the experiment are silver/silver chloride (Metrohm) as a reference electrode and surfactant – sensitive electrodes with homemade plasticized PVC membrane.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:287160
Study programmeTitle: Chemistry
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije)
Type of resourceText
File originBorn digital
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Created on2016-07-15 08:31:24