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Enzymatic Clarification of Fruit Juices (Apple, Pineapple, and Tomato) Using Purified Bacillus pumilus SV-85S Xylanase
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  • Enzymatic Clarification of Fruit Juices (Apple, Pineapple, and Tomato) Using Purified Bacillus pumilus SV-85S Xylanase
  • Enzymatic Clarification of Fruit Juices (Apple, Pineapple, and Tomato) Using Purified Bacillus pumilus SV-85S Xylanase
저자명
Nagar. Sushil,Mittal. Anuradha,Gupta. Vijay Kumar
간행물명
Biotechnology and bioprocess engineering
권/호정보
2012년|17권 6호|pp.1165-1175 (11 pages)
발행정보
한국생물공학회
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정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The xylanase obtained from a hyper-producer Bacillus pumilus SV-85S was purified and characterized to evaluate its potential in industrial applications. Xylanase was purified to homogeneity 25.3-fold with 63.2% recovery using cation-exchange chromatography through CMSephadex C-50. The purified xylanase showed a single band on Native-PAGE and a single peak in RP-HPLC confirming its homogeneity. The purified enzyme revealed a single band on SDS-PAGE with a molecular mass of 23.6 kDa, which was confirmed with gel filtration chromatography through Sepharose 6B. The $K_m$ and $V_{max}$ of the purified xylanase was 1.0 mg/mL and 333.3 IU/mL, respectively. The temperature and pH profiles of the purified xylanase revealed that it was thermo and alkali stable. In recent years due to the overall increase in natural fruit juice consumption, juices have become important from a consumption point of view. However, raw juice is turbid and viscous which tends to settle during storage. Therefore, it must be clarified before commercialization. The efficacy of absolutely purified xylanase was studied on juice enrichment of apples (Malus domestica), pineapples (Ananas comosus L.) and tomatos (Lycopersicum esculentum). The treatment with xylanase lead to an increased juice yield by 23.53% (apple), 10.78% (pineapple), and 20.78% (tomato) as well as having a significant effect on juice clarity by an increase of % transmittance of 22.20, 19.80, and 14.30, respectively. The turbidity and viscosity was also decreased without affecting acid neutrality significantly.