MARC details
| 000 -LEADER |
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| fixed length control field |
03349ntm a2200337 i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MY-KuUP |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20260708180016.0 |
| 006 - FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS |
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| fixed length control field |
t|||||r|||| 000 0 |
| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION |
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ta |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
260708t20252025my a|||fr|||| 000 0 eng d |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
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| International Standard Book Number |
THE0010681 (Local) |
| Qualifying information |
Hardback |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
UMPSA |
| Language of cataloging |
eng |
| Transcribing agency |
UMPSA |
| Description conventions |
rda |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
FTKKP .T94 2025 r Bc. |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Hiew, Tzechingi, , |
| Relator term |
author. |
| 245 10 - TITLE STATEMENT |
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| Title |
In-situ immobilised laccase on bacterial cellulose for juice phenolic compounds oxidation / |
| Statement of responsibility, etc. |
Hiew Tzeching |
| 264 #1 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
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| Place of production, publication, distribution, manufacture |
Kuantan, Pahang : |
| Name of producer, publisher, distributor, manufacturer |
UMPSA, |
| Date of production, publication, distribution, manufacture, or copyright notice |
2025 |
| 264 #4 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
|---|
| Date of production, publication, distribution, manufacture, or copyright notice |
© 2025 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
xiii, 60 pages : |
| Other physical details |
illustrations ; |
| 336 ## - CONTENT TYPE |
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| Source |
rdacontent |
| Content type term |
text |
| 337 ## - MEDIA TYPE |
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| Source |
rdamedia |
| Media type term |
unmediated |
| 338 ## - CARRIER TYPE |
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| Source |
rdacarrier |
| Carrier type term |
volume |
| 347 ## - DIGITAL FILE CHARACTERISTICS |
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| Source |
rda |
| File type |
text file |
| Encoding format |
PDF |
| 500 ## - GENERAL NOTE |
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| General note |
Faculty of Chemical and Process Engineering Technology |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Final Year Report (Bachelor of Chemical Engineering ) -- Universiti Malaysia Pahang Al-Sultan Abdullah - 2025 |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Include bibliographical reference |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Laccase is a multi-copper biocatalyst that catalysed the oxidation of phenolic components through a radical-mediated process. Its potential applications in various industrial sectors, including juice clarification, have been progressively developed. The naturally formed polyphenols in fruits offer nutritional benefits, but excessive presence can cause unpleasant turbidity and haze formation. This study focused on the oxidation of phenols in apple juice by utilising in-situ immobilised laccase-bacterial cellulose (BC) biocatalyst. This research aims to evaluate the effects of enzyme loading and reaction duration on the efficiency of phenolic oxidation and then investigate the reusability of the biocatalyst for juice clarification. Methodologically, laccase was immobilised on BC produced from pineapple peel waste through an in-situ synthesis process. The impact of enzyme loading was assessed by varying the biocatalyst amount and measuring the removal of phenolic content, juice clarification and colour reduction. Subsequently, the juice treatment was followed by altering different reaction times based on the best enzyme loading with the same evaluation. Then, reusability was analysed by subjecting the immobilised laccase to multiple cycles of juice treatment and monitoring its residual activity. The results indicated that increased enzyme loading improved catalytic oxidation, enhancing phenolic content removal at 40.3 ± 0.4% while reducing juice clarification for 15.9 ± 2.2% and colour for 23.3 ± 0.7%, respectively, at the best enzyme loading of 0.20 U. Additionally, 120 minutes was the best reaction duration for juice treatment by considering catalytic efficiency and economic feasibility. The result showed the deduction of 35.4 ± 3.5% of total phenolic content, 23.7 ± 1.2% of juice clarity and 26.9 ± 0.5% of its colour. The immobilised enzyme also exhibited excellent operational stability by retaining its activity up to 50% after three batch reactions. This study highlighted the utilisation of low-cost support for laccase immobilisation with application in apple juice clarification. |
| 610 20 - SUBJECT ADDED ENTRY--CORPORATE NAME |
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| Corporate name or jurisdiction name as entry element |
Faculty of Chemical and Process Engineering Technology |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Universities and colleges |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Theses |
| General subdivision |
Dissertations |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
Final Year Report |