Effect of acidification of raw milk on psychrotrophic microrganims.
The contamination of raw milk with psychrotrophic micro-organisms has become a concern because they are able to multiply at refrigeration temperatures and produce heat resistant enzymes that affect the quality of milk and dairy products. The objective of this study was to evaluate the effect of acid...
| Principais autores: | Shirai, Marianne Ayumi, Masson, Maria Lucia |
|---|---|
| Formato: | Artigo |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná (UTFPR)
2013
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| Acesso em linha: |
http://periodicos.utfpr.edu.br/rebrapa/article/view/3364 |
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peri-article-33642015-11-20T13:06:02Z Effect of acidification of raw milk on psychrotrophic microrganims. Shirai, Marianne Ayumi Masson, Maria Lucia Milk; Refrigeration; Carbonation; Shelf-life. The contamination of raw milk with psychrotrophic micro-organisms has become a concern because they are able to multiply at refrigeration temperatures and produce heat resistant enzymes that affect the quality of milk and dairy products. The objective of this study was to evaluate the effect of acidification with CO2 and HCl on mesophilic and psychrotrophic bacteria present in raw milk during cold storage. Raw milk samples were acidified with CO2 and HCl 1N until pH 6,0 and stored at 5 °C for 10 days. The results showed an average reduction of 1 logarithmic cycle in the growth of psychrotrophic and mesophilic microorganisms in samples treated with CO2. Acidification with HCl showed no effect, indicating that inhibitory action was due to CO2 not by pH reduction. DOI: http://dx.doi.org/10.14685/rebrapa.v2i2.68 Universidade Tecnológica Federal do Paraná (UTFPR) CAPES e CNPq 2013-03-04 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf http://periodicos.utfpr.edu.br/rebrapa/article/view/3364 10.14685/rebrapa.v2i2.68 Brazilian Journal of Food Research; v. 2, n. 2 (2011) Brazilian Journal of Food Research; v. 2, n. 2 (2011) 2448-3184 10.14685/rebrapa.v2i2 por http://periodicos.utfpr.edu.br/rebrapa/article/view/3364/2282 http://periodicos.utfpr.edu.br/rebrapa/article/downloadSuppFile/3364/337 |
| institution |
Universidade Tecnológica Federal do Paraná |
| collection |
PERI |
| language |
Português |
| format |
Artigo |
| author |
Shirai, Marianne Ayumi Masson, Maria Lucia |
| spellingShingle |
Shirai, Marianne Ayumi Masson, Maria Lucia Effect of acidification of raw milk on psychrotrophic microrganims. |
| author_sort |
Shirai, Marianne Ayumi |
| title |
Effect of acidification of raw milk on psychrotrophic microrganims. |
| title_short |
Effect of acidification of raw milk on psychrotrophic microrganims. |
| title_full |
Effect of acidification of raw milk on psychrotrophic microrganims. |
| title_fullStr |
Effect of acidification of raw milk on psychrotrophic microrganims. |
| title_full_unstemmed |
Effect of acidification of raw milk on psychrotrophic microrganims. |
| title_sort |
effect of acidification of raw milk on psychrotrophic microrganims. |
| description |
The contamination of raw milk with psychrotrophic micro-organisms has become a concern because they are able to multiply at refrigeration temperatures and produce heat resistant enzymes that affect the quality of milk and dairy products. The objective of this study was to evaluate the effect of acidification with CO2 and HCl on mesophilic and psychrotrophic bacteria present in raw milk during cold storage. Raw milk samples were acidified with CO2 and HCl 1N until pH 6,0 and stored at 5 °C for 10 days. The results showed an average reduction of 1 logarithmic cycle in the growth of psychrotrophic and mesophilic microorganisms in samples treated with CO2. Acidification with HCl showed no effect, indicating that inhibitory action was due to CO2 not by pH reduction. DOI: http://dx.doi.org/10.14685/rebrapa.v2i2.68 |
| publisher |
Universidade Tecnológica Federal do Paraná (UTFPR) |
| publishDate |
2013 |
| url |
http://periodicos.utfpr.edu.br/rebrapa/article/view/3364 |
| _version_ |
1805294199906500608 |
| score |
10,814766 |