Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept
Red pitaya juice (RPJ) was subjected to UV-C irradiation and the potential of UV as a pasteurization tool for reducing microbial load in pitaya juice was evaluated. Effectiveness of the hurdle concept, i.e. addition of citric acid (CA) and dimethyl dicarbonate (DMDC) was also studied. Total plate co...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Faculty of Food Science and Technology, Universiti Putra Malaysia
2012
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| Online Access: | http://psasir.upm.edu.my/id/eprint/40743/ http://psasir.upm.edu.my/id/eprint/40743/1/Nonthermal%20pasteurization%20of%20Pitaya%20%28Hylocereus%20polyrhizus%29%20juice%20using%20the%20hurdle%20concept%20%281457-1461%29.pdf |
| _version_ | 1848849512260435968 |
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| author | Halim, H. Mohd Adzahan, Noranizan Sobhi, Babak Sew, Chang Chew Karim, Roselina Osman, Azizah |
| author_facet | Halim, H. Mohd Adzahan, Noranizan Sobhi, Babak Sew, Chang Chew Karim, Roselina Osman, Azizah |
| author_sort | Halim, H. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Red pitaya juice (RPJ) was subjected to UV-C irradiation and the potential of UV as a pasteurization tool for reducing microbial load in pitaya juice was evaluated. Effectiveness of the hurdle concept, i.e. addition of citric acid (CA) and dimethyl dicarbonate (DMDC) was also studied. Total plate counts (TPC) and yeast and mould counts (YMC) achieved 2.43 log10 and 2.7 log10 reductions respectively after exposure to UV irradiation. Addition of the CA (0.5-2.0%) and dimethyl dicarbonate (DMDC) (5-20 μL/100mL) to pitaya juice reduced the microbial loads, with 1.5% CA and 15 μL/100mL DMDC being the most effective concentrations. Addition of CA and DMDC into RPJ prior to UV treatment achieved significantly higher microbial reduction compared to UV alone, which were 4.12 log10 and 4.14 log10 reductions for TPC and for YMC, respectively. |
| first_indexed | 2025-11-15T09:51:34Z |
| format | Article |
| id | upm-40743 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:51:34Z |
| publishDate | 2012 |
| publisher | Faculty of Food Science and Technology, Universiti Putra Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-407432015-11-30T02:47:57Z http://psasir.upm.edu.my/id/eprint/40743/ Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept Halim, H. Mohd Adzahan, Noranizan Sobhi, Babak Sew, Chang Chew Karim, Roselina Osman, Azizah Red pitaya juice (RPJ) was subjected to UV-C irradiation and the potential of UV as a pasteurization tool for reducing microbial load in pitaya juice was evaluated. Effectiveness of the hurdle concept, i.e. addition of citric acid (CA) and dimethyl dicarbonate (DMDC) was also studied. Total plate counts (TPC) and yeast and mould counts (YMC) achieved 2.43 log10 and 2.7 log10 reductions respectively after exposure to UV irradiation. Addition of the CA (0.5-2.0%) and dimethyl dicarbonate (DMDC) (5-20 μL/100mL) to pitaya juice reduced the microbial loads, with 1.5% CA and 15 μL/100mL DMDC being the most effective concentrations. Addition of CA and DMDC into RPJ prior to UV treatment achieved significantly higher microbial reduction compared to UV alone, which were 4.12 log10 and 4.14 log10 reductions for TPC and for YMC, respectively. Faculty of Food Science and Technology, Universiti Putra Malaysia 2012 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/40743/1/Nonthermal%20pasteurization%20of%20Pitaya%20%28Hylocereus%20polyrhizus%29%20juice%20using%20the%20hurdle%20concept%20%281457-1461%29.pdf Halim, H. and Mohd Adzahan, Noranizan and Sobhi, Babak and Sew, Chang Chew and Karim, Roselina and Osman, Azizah (2012) Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept. International Food Research Journal, 19 (4). pp. 1457-1461. ISSN 1985-4668; ESSN: 2231-7546 http://www.ifrj.upm.edu.my/19%20%2804%29%202012/24%20IFRJ%2019%20%2804%29%202012%20Nora%20%28020%29.pdf |
| spellingShingle | Halim, H. Mohd Adzahan, Noranizan Sobhi, Babak Sew, Chang Chew Karim, Roselina Osman, Azizah Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept |
| title | Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept |
| title_full | Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept |
| title_fullStr | Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept |
| title_full_unstemmed | Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept |
| title_short | Nonthermal pasteurization of pitaya (Hylocereus polyrhizus) juice using the hurdle concept |
| title_sort | nonthermal pasteurization of pitaya (hylocereus polyrhizus) juice using the hurdle concept |
| url | http://psasir.upm.edu.my/id/eprint/40743/ http://psasir.upm.edu.my/id/eprint/40743/ http://psasir.upm.edu.my/id/eprint/40743/1/Nonthermal%20pasteurization%20of%20Pitaya%20%28Hylocereus%20polyrhizus%29%20juice%20using%20the%20hurdle%20concept%20%281457-1461%29.pdf |