Analiza ekstraktivnih tvari i ligina u bukovoj piljevini, pšeničnoj slami i kukuruznim oklascima

undergraduate thesis

• Title (english): Analysis of extratives and lignin in beech sawdust, wheat straw and corn cobs
• Author: Tanja Lešić
• Mentor: Vlatka Petravić Tominac (mentor)
• Granter: University 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 country: 2014-07-10, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

Za analizu su odabrane bukova piljevina, pšenična slama i kukuruzni oklasci, jer su lako dostupni u velikim količinama u kontinentalnom dijelu Hrvatske i predstavljaju potencijalne lignocelulozne sirovine za budući razvoj biotehnološke proizvodnje. Nakon usitnjavanja, uzorci su prosijani kroz sito veličine otvora 1 mm i analizirani su udjeli suhe tvari, pepela, sirovih proteina, vodenog i etanolnog ekstrakta te topljivog, netopljivog i ukupnog lignina. Uzorci su sadržavali 0,94 - 6,30 % pepela te 0,46 - 2,88% proteina u suhoj tvari. Najviše vodenog ekstrakta i etanolnog ekstrakta je sadržavala pšenična slama, dok je najveći omjer vodenog ekstrakta i etanolnog ekstrakta zabilježen u bukovoj piljevini. Udjeli ukupnog lignina u suhoj tvari pšenične slame, kukuruznih oklasaka i bukove piljevine iznosili su 18.63 %, 18.22 % odnosno 16.52%. Udio netopljivog lignina u ukupnom ligninu bio je najmanji u pšeničnoj slami, a najveći bukovoj piljevini.

Abstract (english)

Beech sawdust, wheat straw and corn cobs are chosen for analysis because they are easily available in large amounts in the continental part of Croatia and represent potential lignocellulosic raw materials for future development of biotechnological production. After size reduction and passing of particles through 1-mm sieves, the samples were analysed for dry weight, ash, crude protein, water extract and ethanol extract as well as soluble, insoluble and total lignin. The samples contained 0.94 - 6.30 % of ash and 0.46 - 2.88 % of proteins on dry weight basis. Wheat straw had both the highest water extract and ethanol extract, while the highest ratio of water extract and ethanol extract was found for beech sawdust. Contents of total lignin on dry weight basis for wheat straw, corn cobs and beech sawdust were 18.63 %, 18.22 % and 16.52 %, respectively. Portion of insoluble lignin in total lignin was the lowest for wheat straw and the highest for beech sawdust.

• Keywords: analiza; lignocelulozne sirovine; bukova piljevina; pšenična slama; kukuruzni oklasci
• Keywords (english): analysis; lignocellulosic raw materials; beech sawdust; wheat straw; corn cob
• Language: croatian
• URN:NBN: urn:nbn:hr:159:639342
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-04-26 12:28:31