A Comparison of the Determination of the Rennet Coagulation Properties of Bovine Milk
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F16%3A43909329" target="_blank" >RIV/62156489:43210/16:43909329 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.5219/604" target="_blank" >http://dx.doi.org/10.5219/604</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5219/604" target="_blank" >10.5219/604</a>
Alternative languages
Result language
angličtina
Original language name
A Comparison of the Determination of the Rennet Coagulation Properties of Bovine Milk
Original language description
The aim of the work was compared of two different methods (the visual method and the nephelo turbidimetry method) for determination of rennet coagulation time. It was observed the effect of heat treatment of milk; types of rennet and addition of different amount of CaCl2 into the pasteurized milk. It was used two different chymosin rennet. For the visual method was milk sample (100 mL) equilibrated at 35 oC, 1 mL of rennet was added into milk and was measured the time required for the first visible flakes (visual method). For the determination rennet coagulation time by nephelo-turbidimetry was removed part of milk with rennet and placed into nephelo-turbidimetry. Milk had a titratable acidity in the range from 6.5 to 7.0 oSH, average pH of milk was 6.68. Dry matter content was in range from 12.351 to 13.142%. The average content of protein by Kjeldahl was 3.14%, fat by Gerber 4.34%, lactose by polarimetry 4.68% and calcium content 1.1%. The pasteurized milk had the worst rennet coagulation time about 32 s compared to the raw milk. The difference coagulation time between milk with addition of 20 μL CaCl2 and 40 μL CaCl2 was in range 21 s to 26 s by visual method. The difference coagulation time between milk with addition of 20 μL CaCl2 and 40 μL CaCl2 was 15 s by nephelo-turbidimetry method. There occurred statistically non-significant differences in most of the measurements, comparing the visual and the nephelo-turbidimetric method. The heat treatment, addition of CaCl2 and using of different rennet had an influence on the curd category. It was obtained, that using nephelo-turbidimetry shown objective results for measuring the rennet coagulation time contrary the subjective visual method. Further, the results obtained by nephelo-turbidimetry are accurate and determined with the lower variation.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GM - Food industry
OECD FORD branch
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Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Potravinárstvo (Food Science)
ISSN
1337-0960
e-ISSN
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Volume of the periodical
10
Issue of the periodical within the volume
1
Country of publishing house
SK - SLOVAKIA
Number of pages
6
Pages from-to
366-371
UT code for WoS article
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EID of the result in the Scopus database
2-s2.0-85016306210