Optical analysis, antioxidant activity and microbiological quality of cold-pressed pumpkin oil
Consumer interest in minimally processed food, including cold-pressed oil, is growing year by year, along with evidence of the positive effects of various bioactive ingredients that promote health. This study aimed to characterize the cold-pressed oils obtained from non-intensively grown pumpkins. S...
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| Format: | Article |
| Language: | Bulgarian |
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University of Zagreb, Faculty of Agriculture
2025-03-01
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| Series: | Journal of Central European Agriculture |
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| Online Access: | https://jcea.agr.hr/articles/771407_Optical_analysis_antioxidant_activity_and_microbiological_quality_of_cold_pressed_pumpkin_oil_en.pdf |
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| _version_ | 1850066391309221888 |
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| author | Vesna Đurović Mirjana Radovanović Dalibor Tomić Miloš Marjanović Leka Mandić |
| author_facet | Vesna Đurović Mirjana Radovanović Dalibor Tomić Miloš Marjanović Leka Mandić |
| author_sort | Vesna Đurović |
| collection | DOAJ |
| description | Consumer interest in minimally processed food, including cold-pressed oil, is growing year by year, along with evidence of the positive effects of various bioactive ingredients that promote health. This study aimed to characterize the cold-pressed oils obtained from non-intensively grown pumpkins. Some optical characteristics, content of total phenols and antioxidant activity were determined, as well as microbiological analysis of the obtained oils. Cold-pressed pumpkin oils differ in the ranges of specific absorbances: 3.40–7.04 at 232 nm and 1.96–3.33 at 270 nm. The refractive index at 23 °C varies from 1.4700 to 1.4730. The content of total phenols in pumpkin oil ranged from 1.83 to 4.56 mg GAE (gallic acid equivalent)/100 mL. The results of DPPH• (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activities, expressed as % inhibition in the lipophilic fraction from pumpkin oil ranged from 42.48% to 66.91%. The number of bacteria and molds determined was by the Regulations, and sulfite-reducing bacteria were not detected in the oils. Cold-pressed oils are a good source of antioxidants and their use is beneficial for human health. |
| format | Article |
| id | doaj-art-0f08efb08c364067a0c164b7bbafa27d |
| institution | DOAJ |
| issn | 1332-9049 |
| language | Bulgarian |
| publishDate | 2025-03-01 |
| publisher | University of Zagreb, Faculty of Agriculture |
| record_format | Article |
| series | Journal of Central European Agriculture |
| spelling | doaj-art-0f08efb08c364067a0c164b7bbafa27d2025-08-20T02:48:46ZbulUniversity of Zagreb, Faculty of AgricultureJournal of Central European Agriculture1332-90492025-03-0126119119810.5513/JCEA01/26.1.4400Optical analysis, antioxidant activity and microbiological quality of cold-pressed pumpkin oilVesna ĐurovićMirjana RadovanovićDalibor TomićMiloš MarjanovićLeka MandićConsumer interest in minimally processed food, including cold-pressed oil, is growing year by year, along with evidence of the positive effects of various bioactive ingredients that promote health. This study aimed to characterize the cold-pressed oils obtained from non-intensively grown pumpkins. Some optical characteristics, content of total phenols and antioxidant activity were determined, as well as microbiological analysis of the obtained oils. Cold-pressed pumpkin oils differ in the ranges of specific absorbances: 3.40–7.04 at 232 nm and 1.96–3.33 at 270 nm. The refractive index at 23 °C varies from 1.4700 to 1.4730. The content of total phenols in pumpkin oil ranged from 1.83 to 4.56 mg GAE (gallic acid equivalent)/100 mL. The results of DPPH• (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activities, expressed as % inhibition in the lipophilic fraction from pumpkin oil ranged from 42.48% to 66.91%. The number of bacteria and molds determined was by the Regulations, and sulfite-reducing bacteria were not detected in the oils. Cold-pressed oils are a good source of antioxidants and their use is beneficial for human health.https://jcea.agr.hr/articles/771407_Optical_analysis_antioxidant_activity_and_microbiological_quality_of_cold_pressed_pumpkin_oil_en.pdfcold-pressed oilcucurbita peporefractive indexspecific absorbanceantioxidantsmicrobiological quality |
| spellingShingle | Vesna Đurović Mirjana Radovanović Dalibor Tomić Miloš Marjanović Leka Mandić Optical analysis, antioxidant activity and microbiological quality of cold-pressed pumpkin oil Journal of Central European Agriculture cold-pressed oil cucurbita pepo refractive index specific absorbance antioxidants microbiological quality |
| title | Optical analysis, antioxidant activity and microbiological quality of cold-pressed pumpkin oil |
| title_full | Optical analysis, antioxidant activity and microbiological quality of cold-pressed pumpkin oil |
| title_fullStr | Optical analysis, antioxidant activity and microbiological quality of cold-pressed pumpkin oil |
| title_full_unstemmed | Optical analysis, antioxidant activity and microbiological quality of cold-pressed pumpkin oil |
| title_short | Optical analysis, antioxidant activity and microbiological quality of cold-pressed pumpkin oil |
| title_sort | optical analysis antioxidant activity and microbiological quality of cold pressed pumpkin oil |
| topic | cold-pressed oil cucurbita pepo refractive index specific absorbance antioxidants microbiological quality |
| url | https://jcea.agr.hr/articles/771407_Optical_analysis_antioxidant_activity_and_microbiological_quality_of_cold_pressed_pumpkin_oil_en.pdf |
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