Impact of Hop Freshness on Dry Hopped Beer Quality
The hop plant is seasonal, but beer production continues throughout the whole year. The quality of hops begins to decrease immediately after harvesting; therefore, maintaining the highest possible quality is important. A good indicator of hop freshness is the hop storage index (HSI). In this study,...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Foods |
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| Online Access: | https://www.mdpi.com/2304-8158/11/9/1310 |
| _version_ | 1797504852573552640 |
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| author | Ksenija Rutnik Miha Ocvirk Iztok Jože Košir |
| author_facet | Ksenija Rutnik Miha Ocvirk Iztok Jože Košir |
| author_sort | Ksenija Rutnik |
| collection | DOAJ |
| description | The hop plant is seasonal, but beer production continues throughout the whole year. The quality of hops begins to decrease immediately after harvesting; therefore, maintaining the highest possible quality is important. A good indicator of hop freshness is the hop storage index (HSI). In this study, three different varieties of hops with five different HSI values, from 0.3 to 0.7, were used for brewing with the dry hopping technique. The main goal was to evaluate the impact of the HSI value on beer quality in terms of hop aroma and bitterness. Alpha acids, iso-alpha acids, humulinones, bitterness units and hop aroma compounds were chemically analysed. Sensorial analysis was also conducted on all samples. Decreases in the intensity and quality of hop aroma were detected with increasing HSI. The quality of bitterness was also reduced. High HSI also led to undesirable gushing. Beers brewed with hops with HSI values greater than 0.4 had deviations in aroma and bitterness when compared with beers brewed with fresh hops. |
| first_indexed | 2024-03-10T04:10:17Z |
| format | Article |
| id | doaj.art-81300923b8f74c59bcf18dd5186a4e6f |
| institution | Directory Open Access Journal |
| issn | 2304-8158 |
| language | English |
| last_indexed | 2024-03-10T04:10:17Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Foods |
| spelling | doaj.art-81300923b8f74c59bcf18dd5186a4e6f2023-11-23T08:13:39ZengMDPI AGFoods2304-81582022-04-01119131010.3390/foods11091310Impact of Hop Freshness on Dry Hopped Beer QualityKsenija Rutnik0Miha Ocvirk1Iztok Jože Košir2Department for Agrochemistry and Brewing, Slovenian Institute of Hop Research and Brewing, 3310 Žalec, SloveniaDepartment for Agrochemistry and Brewing, Slovenian Institute of Hop Research and Brewing, 3310 Žalec, SloveniaDepartment for Agrochemistry and Brewing, Slovenian Institute of Hop Research and Brewing, 3310 Žalec, SloveniaThe hop plant is seasonal, but beer production continues throughout the whole year. The quality of hops begins to decrease immediately after harvesting; therefore, maintaining the highest possible quality is important. A good indicator of hop freshness is the hop storage index (HSI). In this study, three different varieties of hops with five different HSI values, from 0.3 to 0.7, were used for brewing with the dry hopping technique. The main goal was to evaluate the impact of the HSI value on beer quality in terms of hop aroma and bitterness. Alpha acids, iso-alpha acids, humulinones, bitterness units and hop aroma compounds were chemically analysed. Sensorial analysis was also conducted on all samples. Decreases in the intensity and quality of hop aroma were detected with increasing HSI. The quality of bitterness was also reduced. High HSI also led to undesirable gushing. Beers brewed with hops with HSI values greater than 0.4 had deviations in aroma and bitterness when compared with beers brewed with fresh hops.https://www.mdpi.com/2304-8158/11/9/1310aged hopsbeer qualityhop storage index |
| spellingShingle | Ksenija Rutnik Miha Ocvirk Iztok Jože Košir Impact of Hop Freshness on Dry Hopped Beer Quality Foods aged hops beer quality hop storage index |
| title | Impact of Hop Freshness on Dry Hopped Beer Quality |
| title_full | Impact of Hop Freshness on Dry Hopped Beer Quality |
| title_fullStr | Impact of Hop Freshness on Dry Hopped Beer Quality |
| title_full_unstemmed | Impact of Hop Freshness on Dry Hopped Beer Quality |
| title_short | Impact of Hop Freshness on Dry Hopped Beer Quality |
| title_sort | impact of hop freshness on dry hopped beer quality |
| topic | aged hops beer quality hop storage index |
| url | https://www.mdpi.com/2304-8158/11/9/1310 |
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