| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document Help

Title:Ekstrakcija lubja kostanja s subkritično vodo
Authors:ID Turk, Andreja (Author)
ID Škerget, Mojca (Mentor) More about this mentor... New window
ID Čolnik, Maja (Comentor)
Files:.pdf VS_Turk_Andreja_2018.pdf (3,83 MB)
MD5: 90305F46D424477A282F283971736326
PID: 20.500.12556/dkum/fc88b2a4-bbc5-472a-b4f0-e7c7d1710c53
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Biomasa predstavlja naravni vir vrednih komponent. Lubje kostanja vsebuje visoke vsebnosti taninov in različne fenolne spojine, ki se uporabljajo v medicini ter farmacevtski, kozmetični in prehrambeni industriji. Namen diplomskega dela je bil separirati vredne spojine iz lubja kostanja s subkritično vodo in optimizirati proces z uporabo metode odzivnih površin z zasnovo Box-Behnkenovega načrtovanja. Optimizirali smo tri ključne spremenljivke, in sicer temperaturo, čas in razmerje topilo/material, ter spremljali njihov vpliv na ekstrakcijski izkoristek in vsebnost vrednih komponent v lubju, kot so totalni fenoli, totalni tanini in antioksidativna aktivnost. V lubju smo dokazali prisotnost elagne in galne kisline, elagotaninov (veskalagin, kastalagin, 1-o-galoj kastalagin), sladkorjev (maltoza, glukoza, fruktoza in arabinoza) ter njihovih derivatov (5-HMF, furfural in levulinska kislina). Zadnji korak v diplomskem delu je bil določitev optimalnih pogojev, s katerimi bi dosegli najvišjo vsebnost elagne kisline ter zadovoljive vsebnosti totalnih fenolov in totalnih taninov.
Keywords:subkritična voda, navadni kostanj, fenolne spojine, tanini, optimizacija procesa, Box-Behnkenova metoda
Place of publishing:Maribor
Publisher:[A. Turk]
Year of publishing:2018
PID:20.500.12556/DKUM-71586 New window
UDC:547.98:582.747.2(043.2)
COBISS.SI-ID:21950486 New window
NUK URN:URN:SI:UM:DK:BAYXCXNO
Publication date in DKUM:10.09.2018
Views:2202
Downloads:158
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
Copy citation
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share



Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:22.08.2018

Secondary language

Language:English
Title:Extraction of chestnut bark with subcritical water
Abstract:Biomass represents the natural source of valuable compounds. Chestnut bark contains high level of tannins and various phenolic compounds which can be utilized in medicine and pharmaceutical, cosmetic, and food industry. The aim of this work was optimization of subcritical water extraction process of chestnut bark using Box-Behnken response surface method. The influence of process parameters, such as temperature, extraction time and solid-solvent ratio, on extraction yield, yield of the main compounds, total phenol content, total tannin content and antioxidant activity was observed. The identified compounds were ellagic and gallic acid, ellagitannins (vescalagin, castalagin, 1-o-galloyl castalagin), sugars (maltose, glucose, fructose and arabinose) and sugar derivatives (5-HMF, furfural and levulinic acid). The final step of the work was determination of the optimal conditions of the process to obtain the bark extract highly rich in ellagic acid and with satisfactory level of total phenols and total tannins.
Keywords:subcritical water, sweet chestnut, phenolic compounds, tannins, optimization of process, Box-Behnken method


Comments

Leave comment

You must log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica