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

Types of community, Types of Community On the basis of size and degree ...

Types of Community On the basis of size and degree of relative independence communities may be divided into two types: i) Major Community: These are large-sized, well org

PROTOZOA., WHAT ARE THE ADVANTAGES & THE DISADVANTAGES OF PROTOZOA?

WHAT ARE THE ADVANTAGES & THE DISADVANTAGES OF PROTOZOA?

Explain the objective of cardiac rehabilitation, Explain the OBJECTIVE of C...

Explain the OBJECTIVE of Cardiac Rehabilitation ? After going through this unit, you should be able to: 1 identifies the eligible candidate for cardiac rehabilitation and be

Define the process of digestion of fats, Define the Process of Digestion of...

Define the Process of Digestion of Fats? The enzyme in human gut which is responsible for fat digestion is 'lipase', Lipase is secreted by both stomach and pancreas. In stomach

How are the male gametes of gymnosperms formed, Q. How are the male gametes...

Q. How are the male gametes of gymnosperms formed? What is the relationship between the pollen grains and the concept of alternation of generations? In the male strobiles (cone

Describe the epithelial cells of the kidney proximal tubule, Epithelial cel...

Epithelial cells of the kidney proximal tubule ?   A.  The sodium-glucose co-transporter in the luminal membrane is responsible for the net flux of glucose from luminal space to

Metabolic events, Metabolic Events Let us now examine the changes that...

Metabolic Events Let us now examine the changes that occur in the seeds after they imbibe water. In general, the most important metabolic events are: Degradation

Future directions in biodiversity valuation, The methods that can be used f...

The methods that can be used for valuing biodiversity are still evolving at the global level, but studies have been done on how biodiversity values can be incorporated into the pro

Objectives of counselling technique of diabetic patient, - Highlight the is...

- Highlight the issues related to diabetes mellitus. - Apply different types of counselling skills to counsel patient with Diabetes and their family members - Develop pre-req

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