Nauka Przyroda Technologie

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Dorota Cais-Sokolińska, Romualda Danków, Jan Pikul
Dynamics of changes in acidity of yoghurt with an addition of cereals during cold storage
Summary.

The aim of the study was to assess the dynamics of titrate acidity of yoghurt with an addition of cereal products during their further cold storage. A 10% or 30% addition of buckwheat, oat or barley groats steamed for 10 min was placed in the curd with pH 4.52 and 49.3°C. Introduction of 10% of groats to the curd resulted in a decrease of acidity by 7.4% (buckwheat groats), 11.1% (oat groats) and by 34.4% (barley groats). The higher the addition of groats, the bigger were the differences. At a 10% addition an increase in yoghurt acidity after 3-week storage was found when analysing samples with oat groats. Higher acidity than that after production was also recorded for yoghurts with a 30% addition of oat groats (D°SH = 3.65) and barley groats (D°SH = 12.47). After that time the lowest acidity was found for yoghurt with a 30% addition of buckwheat groats (33.9°SH). Yoghurts with barley groats were least stable during storage. The difference between the biggest and the smallest value was 20.02°SH (a 30% addition) and 4.93°SH (a 10% addition).

Key words: yoghurt, acidity, buckwheat groats, shelf-life
PDFFull text available in Polish in Adobe Acrobat format:
http://www.npt.up-poznan.net/tom3/zeszyt4/art_111.pdf

For citation:

MLA Cais-Sokolińska, Dorota, et al. "Dynamika zmian kwasowości jogurtu z dodatkiem produktów zbożowych podczas chłodniczego przechowywania." Nauka Przyr. Technol. 3.4 (2009): #111.
APA Dorota Cais-Sokolińska, Romualda Danków, Jan Pikul (2009). Dynamika zmian kwasowości jogurtu z dodatkiem produktów zbożowych podczas chłodniczego przechowywania. Nauka Przyr. Technol. 3 (4), #111
ISO 690 CAIS-SOKOLIńSKA, Dorota, DANKóW, Romualda, PIKUL, Jan. Dynamika zmian kwasowości jogurtu z dodatkiem produktów zbożowych podczas chłodniczego przechowywania. Nauka Przyr. Technol., 2009, 3.4: #111.
Corresponding address:
Dorota Cais-Sokolińska
Katedra Technologii Mleczarstwa
Uniwersytet Przyrodniczy w Poznaniu
ul. Wojska Polskiego 31/33
60-624 Poznań
Poland

e-mail: cais@up.poznan.pl
Accepted for print: 29.09.2009