Buffers in foods, Biology

Assignment Help:

Some foods are better able to resist changes in pH than others. These tend to resist changes in pH since these are buffered and the ability to resist changes in pH is known as buffering capacity. The buffers are the compounds present in food that resist changes in pH and thus are important. These are especially effective within a certain pH range. Buffers permit an acid (or alkaline) fermentation to go on longer with a greater yield of products and organisms than would otherwise be possible. In general, meats are more buffered than vegetables. Contributing to the buffering capacity of meats are their various proteins. Vegetables are generally low in proteins and consequently lack the buffering capacity to resist changes in their pH by the growth of microorganisms. Hence these permit an appreciable decrease in pH with the production of small amounts of acid by the lactic acid bacteria during the early part of sauerkraut and pickle fermentations. This is desirable since it enables the lactic acid bacteria to suppress the undesirable pectin-hydrolyzing and proteolytic organisms which cause spoilage. Low buffering power makes for a more rapidly appearing succession of microorganisms during fermentation than high buffering power. Milk is fairly high in protein (a good buffer) and therefore permits considerable growth and acid production by lactic acid bacteria during the manufacture of fermented milks before growth is suppressed.


Related Discussions:- Buffers in foods

Treatment and management of diarrhoea, Q. Treatment and Management of Diarr...

Q. Treatment and Management of Diarrhoea? You must have realized by now that diarrhoea should not be neglected and must receive prompt medical care to minimize the frequency of

Proteins requirement in diabetes, Q. Proteins requirement in diabetes? ...

Q. Proteins requirement in diabetes? Proteins: Proteins should be provided in adequate amounts to maintain a normal body composition and prevent depletion of lean tissue mass.

Explain senning procedure, Explain Senning Procedure ? Operation is per...

Explain Senning Procedure ? Operation is performed by ascending arteries and separate SVC and IVC cannulation. If the operation is done under deep hypothermic circulatory arres

How linnaeus classify the plant kingdom, Q. How Linnaeus classify the plant...

Q. How Linnaeus classify the plant kingdom? Linnaeus classified the plant kingdom into 24 classes in his famous work 'Genera Plantarum' (1737) and 'Species Plantarum' (1753). I

What is the relationship between hypothesis and a theory, What is the relat...

What is the relationship between the following scientific terms: hypothesis, a theory, and a natural law?

Precautions for determination of fungal and yeast count, Explain Precaution...

Explain Precautions for Determination of Fungal and Yeast Count? 1. Maintain aseptic conditions. 2. Keep alcohol away from flame. 3. To avoid infections and allergies, ca

Lymph, why is it known as middle man

why is it known as middle man

Aeration, Aeration A well-aerated soil is one in which gases are availa...

Aeration A well-aerated soil is one in which gases are available to plant roots and other soil organisms, in sufficient quantities and in proper proportions to support their no

How gender affects the bmr, How Gender affects the bmr? We have already...

How Gender affects the bmr? We have already emphasized earlier that sex difference in metabolic rates are primarily attributable to difference in body size and composition. Wom

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd