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undergraduate thesis
Utjecaj alkalne obrade kukuruznih oklasaka na udjele lignina i celuloze
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2015. urn:nbn:hr:159:452011
Hanžek, Marija
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Biochemical Engineering
Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

Cite this document

Hanžek, M. (2015). Utjecaj alkalne obrade kukuruznih oklasaka na udjele lignina i celuloze (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:452011

Hanžek, Marija. "Utjecaj alkalne obrade kukuruznih oklasaka na udjele lignina i celuloze." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2015. https://urn.nsk.hr/urn:nbn:hr:159:452011

Hanžek, Marija. "Utjecaj alkalne obrade kukuruznih oklasaka na udjele lignina i celuloze." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2015. https://urn.nsk.hr/urn:nbn:hr:159:452011

Hanžek, M. (2015). 'Utjecaj alkalne obrade kukuruznih oklasaka na udjele lignina i celuloze', Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 14 October 2024, https://urn.nsk.hr/urn:nbn:hr:159:452011

Hanžek M. Utjecaj alkalne obrade kukuruznih oklasaka na udjele lignina i celuloze [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2015 [cited 2024 October 14] Available at: https://urn.nsk.hr/urn:nbn:hr:159:452011

M. Hanžek, "Utjecaj alkalne obrade kukuruznih oklasaka na udjele lignina i celuloze", Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2015. Available at: https://urn.nsk.hr/urn:nbn:hr:159:452011

Metadata
TitleUtjecaj alkalne obrade kukuruznih oklasaka na udjele lignina i celuloze
Title (english)Effect of alkaline treatment of corn cobs on the portions of lignin and cellulose
AuthorMarija Hanžek
MentorVlatka Petravić Tominac (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Biochemical Engineering)
(Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology)
Zagreb
Defense date and country2015-07-08, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
Kukuruzni oklasci mogu se koristiti kao lako dostupna obnovljiva lignocelulozna sirovina. Istražen je utjecaj alkalne obrade na sastav kukuruznih oklasaka. Udio ukupnog lignina u suhoj tvari kukuruznih oklasaka iznosio je 11,55 % (10,02 % netopljivog i 1,54 % topljivog lignina). Ukupni ekstrakt u suhoj tvari alkalno obrađenih kukuruznih oklasaka bio je 1,26 % (0,53 % vodenog ekstrakta i 0,73 % etanolnog ekstrakta). Alkalnom obradom je uklonjen velik dio lignina. U suhoj tvari alkalno obrađenih i ekstrahiranih kukuruznih oklasaka bilo je 5,19 % ukupnog lignina (2,74 % netopljivog i 2,16 % topljivog lignina). Istovremeno je došlo do povećanja udjela celuloze sa 42,23 % u polaznoj sirovini na 74,38 % u suhoj tvari alkalno obrađenih kukuruznih oklasaka. Udio hemiceluloze, izračunat oduzimanjem ostalih spojeva od ukupne suhe tvari bio je 39,00 % u kukuruznim oklascima, odnosno 18,52 % u alkalno obrađenom materijalu. Bojenje mikroskopskih preparata floroglucinolom nije pogodno za vizualizaciju lignina u kukuruznim oklascima prije i poslije alkalne obrade, međutim ova metoda se pokazala uspješnom za slamu.
Abstract (english)
Corn cobs can be used as a readily available renewable lignocellulosic feedstock. The effect of alkaline treatment on corn cobs composition was analyzed. Portion of total lignin in the dry matter of corn cobs was 11.55 % (10.02 % and 1.54 % of insoluble and soluble lignin, respectively). The share of total extract in dry matter of corn cobs after alkaline treatment was 1.26 % (0.53 % of water extract and 0.73% of ethanol extract). The treatment has removed a large part of lignin. The treated corn cobs contained 5.19 % of the total lignin (2.46 % and 2.73 % of insoluble and soluble lignin, respectively) in the dry matter. At the same time there has been an increase in the portion of cellulose in the dry matter, with approximately 42.23 % in the raw material to 74.38 % in the alkaline processed material. Portion of hemicellulose, calculated by subtracting other compounds from the total solids, were 39.00 and 18.52 % for corn cobs and alkaline treated material, repectively. Staining with phloroglucinol was not a suitable method for the microscopic visualization of lignin in corn cobs (both before and after alkaline treatment). However, this method was successful for straw.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:452011
Study programmeTitle: Biotechnology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
Type of resourceText
File originBorn digital
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Created on2017-04-25 13:40:06