Microcalorimetric study of growth of Lactococcus lactis IL1403 at low glucose concentration in liquids and solid agar gels
| Autor: | Natalja Kabanova, Raivo Vilu, Irina Stulova |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Isothermal microcalorimetry
food.ingredient Chromatography biology Lactococcus lactis Bacterial growth Condensed Matter Physics biology.organism_classification Lactic acid chemistry.chemical_compound food Biochemistry chemistry Yield (chemistry) Phase (matter) Agar Physical and Theoretical Chemistry Instrumentation Bacteria |
| Zdroj: | Thermochimica Acta. 559:69-75 |
| ISSN: | 0040-6031 |
| DOI: | 10.1016/j.tca.2013.02.013 |
| Popis: | Growth of Lactococcus lactis IL1403 in liquid cultures and solid agar gels at different low glucose concentrations starting from 2 g L −1 up to 10 g L −1 with a stepwise increase by 1 g L −1 was studied using thermal activity monitor TAM III. In parallel to calorimetric measurements the changes of glucose and lactic acid concentrations and pH of culture media were measured in order to obtain additional information for the interpretation of calorimetric power–time curves. The data obtained together with calculated heat yield coefficient Y Q allowed to analyze the growth of bacteria in colonies in solid agar gels in detail. The variation of glucose concentration at low levels allows analyzing and describing growth deceleration phase and growth stopping mechanisms both in liquid cultures and in solid-state fermentations. |
| Databáze: | OpenAIRE |
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