Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian Origin
The present study determined the physico-chemical parameters of the exotic fruit jujube (Ziziphus jujube mill) of Bulgarian origin – pH of 4.62, refractometric dry matter of 31.6 %, dry matter (in weight) of 36.78 %, TTA (total titratable acidity) – citric acid – of 0.67 %, 0.70 % malic acid, 65.95...
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| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | E3S Web of Conferences |
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| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/40/e3sconf_te-re-rd2020_03007.pdf |
| _version_ | 1818739726554759168 |
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| author | Durakova Albena Bogoeva Adelina Yanakieva Velichka Gogova Tzvetana Choroleeva Kornelia |
| author_facet | Durakova Albena Bogoeva Adelina Yanakieva Velichka Gogova Tzvetana Choroleeva Kornelia |
| author_sort | Durakova Albena |
| collection | DOAJ |
| description | The present study determined the physico-chemical parameters of the exotic fruit jujube (Ziziphus jujube mill) of Bulgarian origin – pH of 4.62, refractometric dry matter of 31.6 %, dry matter (in weight) of 36.78 %, TTA (total titratable acidity) – citric acid – of 0.67 %, 0.70 % malic acid, 65.95 % moisture, 0.78 % fibre, 1.41 % protein, 23.65 % carbohydrate, 0.24 % fat and energy value of 428.44 kJ/102.4 kcal. Equilibrium moisture content and monolayer moisture content were established for desorption concerning eight water activities in the 0.1 0.9 range and the temperatures of 10 °С, 25 °С and 40 °С. The coefficients of the modified Oswin, Chung-Pfost, Halsey and Henderson models were obtained statistically. The modified Halsey model is recommended as a description of the desorption isotherms of jujube (Ziziphus jujube mill) since it corresponds to the criteria for model assessment and suitability. Via BET model linearization, the values of the monolayer moisture content for desorption at the temperatures of 10 °С 5.41 % d.b., 25 °С – 4.65 % d.b. and 40 °С 5.08 % d.b were determined. |
| first_indexed | 2024-12-18T01:29:25Z |
| format | Article |
| id | doaj.art-28c063dba3a14116a072c5b2432ecad8 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-18T01:29:25Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-28c063dba3a14116a072c5b2432ecad82022-12-21T21:25:39ZengEDP SciencesE3S Web of Conferences2267-12422020-01-011800300710.1051/e3sconf/202018003007e3sconf_te-re-rd2020_03007Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian OriginDurakova Albena0Bogoeva Adelina1Yanakieva Velichka2Gogova Tzvetana3Choroleeva Kornelia4Department of Process Engineering, University of Food Technologies – PlovdivDepartment of Mechanical and Instrument Engineering, Technical University Sofia, Plovdiv BranchDepartment of Microbiology, University of Food Technologies – PlovdivDepartment of Technology of Grain, Fodder, Bread and Confectionery Products, University of Food Technologies – PlovdivKornelia Choroleeva Language Training Centre, University of Food Technologies – PlovdivThe present study determined the physico-chemical parameters of the exotic fruit jujube (Ziziphus jujube mill) of Bulgarian origin – pH of 4.62, refractometric dry matter of 31.6 %, dry matter (in weight) of 36.78 %, TTA (total titratable acidity) – citric acid – of 0.67 %, 0.70 % malic acid, 65.95 % moisture, 0.78 % fibre, 1.41 % protein, 23.65 % carbohydrate, 0.24 % fat and energy value of 428.44 kJ/102.4 kcal. Equilibrium moisture content and monolayer moisture content were established for desorption concerning eight water activities in the 0.1 0.9 range and the temperatures of 10 °С, 25 °С and 40 °С. The coefficients of the modified Oswin, Chung-Pfost, Halsey and Henderson models were obtained statistically. The modified Halsey model is recommended as a description of the desorption isotherms of jujube (Ziziphus jujube mill) since it corresponds to the criteria for model assessment and suitability. Via BET model linearization, the values of the monolayer moisture content for desorption at the temperatures of 10 °С 5.41 % d.b., 25 °С – 4.65 % d.b. and 40 °С 5.08 % d.b were determined.https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/40/e3sconf_te-re-rd2020_03007.pdfjujube (ziziphus jujube mill)physico-chemical parameterssorption characteristics |
| spellingShingle | Durakova Albena Bogoeva Adelina Yanakieva Velichka Gogova Tzvetana Choroleeva Kornelia Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian Origin E3S Web of Conferences jujube (ziziphus jujube mill) physico-chemical parameters sorption characteristics |
| title | Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian Origin |
| title_full | Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian Origin |
| title_fullStr | Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian Origin |
| title_full_unstemmed | Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian Origin |
| title_short | Desorption of the Exotic Fruit Jujube (Ziziphus Jujube Mill) of Bulgarian Origin |
| title_sort | desorption of the exotic fruit jujube ziziphus jujube mill of bulgarian origin |
| topic | jujube (ziziphus jujube mill) physico-chemical parameters sorption characteristics |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/40/e3sconf_te-re-rd2020_03007.pdf |
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