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Production of alpha amylase by bacillus subtilis from pineapple leaf in solid state fermentation/ Sanmuganathan Gunasakaran

Production of alpha amylase by bacillus subtilis from pineapple leaf in solid state fermentation_ Sanmuganathan Gunasakaran_K4_2011_875003828_NI
Penghasilan enzim α-amilase daripada bakteria Bacillus subtilis telah dikaji dengan keadaan pembiakan yang berbeza ke atas pepejal substrat sebagai penyokong iaitu daun nanas melalui proses fermentasi berkeadaan pepejal (SSF). Pada bahagian pertama, pengaruh pH, pengaruh masa pengeraman, kelembapan media dan penambahan sumber karbon dan nitrogen telah dikaji. Pengeraman dalam keadaan pH 7 mencatatkan aktiviti enzim paling tinggi iaithu sebanyak 4.011 U/g. Selepas 42 jam pengeraman, aktiviti enzim paling tinggi telah diperolehi sebanyak 6.79 U/g . Kelembapan maksimum untuk penghasilan α-amilase telah diperhatikan pada 50 % and ia mencatatkan aktiviti enzim sebanyak 7.716 U/g . Penambahan kanji lebih baik daripada penambahan glukosa yang telah meningkatkan penghasilan enzim α-amilase dengan nilai aktiviti 10.03 U/g. Kesan yang sama diperhatikan apabila urea telah digunakan sebagai sumber nitrogen tambahan. Jika dibandingkan dengan ammonium sulfat, urea mencatatkan aktiviti enzim paling tinggi sebanyak 9.877 U/g. Dengan menggunakan keadaan pembiakan maksimum untuk proses fermentasi berkeadaan pepejal (SSF), didapati daun nanas tidak mempunyai peluang yang baik untuk menjadi pepejal substrat untuk menghasilkan enzim α-amylase disebabkan oleh activiti enzim yang rendah jika dibandingkan dengan pepejal substrat yang lain. Penyelidikan terhadap daun nanas perlu untuk menambahbaikan daun nanas sebagai substrat untuk menghasilkan enzim α-amylase. ___________________________________________________________________________________ The production of α-amylase by Bacillus subtilis was studied under different cultivation conditions using pineapple leaf as solid the substrate and support in solid state fermentation (SSF) process. The influence of pH, incubation time, moisture content and the additional carbon and nitrogen sources on the production of α-amylase by B. subtilis were investigated. Fermentation process with pH 7 recorded the highest enzyme activity with 4.011 U/g. At 42 h, the enzyme production was at maximum level with 6.79 U/g. The maximum moisture content for α-amylase production was observed at 50% with enzyme activity rate of 7.716 U/g. Between the addition of glucose and starch, starch has significantly improved the production of α-amylase with activity rate of 10.03 U/g. Similar effect was observed when urea was supplemented as the additional nitrogen source. The addition of urea is much better than the addition of ammonium sulfate which recorded activity rate of 9.877 U/g. Pineapple leaf is not a good solid substrate in producing α-amylase in SSF under these optimum cultivation conditions because the low rate of enzyme activity compare with other solid substrates. However, further improvement is needed to improve the potential of pineapple leaf as a substrate for the production of α-amylase.
Contributor(s):
Sanmuganathan Gunasakaran - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875003828
Language:
English
Subject Keywords:
Bacillus subtilis ; pineapple leaf ; α-amylase
First presented to the public:
4/1/2011
Original Publication Date:
8/27/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 57
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-08-27 12:29:24.547
Submitter:
Nor Hayati Ismail

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Production of alpha amylase by bacillus subtilis from pineapple leaf in solid state fermentation/ Sanmuganathan Gunasakaran1 2020-08-27 12:29:24.547