| Naslov: | A novel approach for assuring and following inoculum activity during kefir grains growth studies : application of dynamic pH profiles |
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| Avtorji: | ID Tramšek, Marko (Avtor)
ID Goršek, Andreja (Avtor) |
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| Datoteke: |  Acta_Chimica_Slovenica_2007_Tramsek,_Gorsek_A_novel_approach_for_assuring_and_following_inoculum_activity_during_kefir_grains_growth_stu.pdf (384,93 KB)
MD5: E6D0AF5DEDE623654A5CED2BC71FD13D
PID: 20.500.12556/dkum/ac746058-bbd5-4b31-9af9-53b6592a9c5a
 http://acta-arhiv.chem-soc.si/54/54-4-693.pdf
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Znanstveno delo |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | FKKT - Fakulteta za kemijo in kemijsko tehnologijo
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| Opis: | The profiles of kefir grains growth curves strongly depend on bioprocess conditions and inoculum viability. Therefore, accurate growth curve studies require the use of optimally active kefir grains as inoculum. Accordingly, the main objective of our study was experimental optimization of classic kefir grains activation procedure and afterwards, comparison among growth curves of differently activated kefir grains. For this purpose some experiments were initially performed in computer-controlled RC1 reactor provided data of dynamic pH profiles during batch propagation of differently activated grains. Experimental data were mathematically analyzed and using the special methodology of minimizing the absolute deviation of pH(t) profiles the minimal time for grains activation was determined. We established that optimal inoculum activity could be ensured only by the kefir grains, which were previously activated at least over eleven successive days. In the second part of research the growth curve of optimally activated kefir grains was constructed using experimental measurements and fitted with Gompertz model. The present results were compared with the results obtained by our previous study, where classically activated grains were used. We established that, inspite of equal daily kefir grain mass increase, considerable difference in growth curves of differently activated kefir grains exist. |
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| Ključne besede: | chemical processing, kefir grains, growth curve, minimal activation time, dynamic pH profiles, Gompertz model |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Leto izida: | 2007 |
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| Št. strani: | str. 693-699 |
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| Številčenje: | Letn. 54, št. 4 |
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| PID: | 20.500.12556/DKUM-26032  |
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| ISSN: | 1318-0207 |
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| UDK: | 66:519.853 |
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| COBISS.SI-ID: | 11991062 |
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| ISSN pri članku: | 1318-0207 |
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| NUK URN: | URN:SI:UM:DK:EFOICXH3 |
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| Datum objave v DKUM: | 31.05.2012 |
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| Število ogledov: | 2298 |
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| Število prenosov: | 201 |
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| Metapodatki: |    |
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| Področja: | Ostalo
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