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

Mechanism of stomatal opening, Mechanism of Stomatal Opening It has be...

Mechanism of Stomatal Opening It has been known for over a century that stomata open because of reversible turgor changes in the guard cells. Stomata open when turgor in the g

What are cnidocytes, What are cnidocytes? What is the name of the capsule i...

What are cnidocytes? What is the name of the capsule inside the cnidocyte? What are the biological functions of this structure? Cnidocytes are specialized cells present in coel

Ringworm, R i n g w o r m It is also known as dermatophytosis re...

R i n g w o r m It is also known as dermatophytosis resulting in alopecia, scab formation and ring like lesions in the affected body parts. Eti o logy: Zeop

Explain microbial sources of natural colourants, Novel Sources of Natural C...

Novel Sources of Natural Colourants Microbial sources Production of materials by microbial cultures has several advantages. The rapid growth of microbes cuts the productio

How concept of chromosome related to the concept of the gene, How is the co...

How is the concept of chromosome related to the concept of the gene? A chromosome is a DNA molecule and chromosome may contain several different genes and as well DNA portions

Pyramid of numbers - ecological pyramids, Pyramid of Numbers - Ecological P...

Pyramid of Numbers - Ecological Pyramids A graphic representation of the total number of individuals of different species belonging to each trophic level in an ecosystem is kn

What do the major organs of the digestive system do, What do the major orga...

What do the major organs of the digestive system do? They are salivary glands, teeth, tongue, gums, esophagus, stomach, small intestine, large intestine, pancreas, liver, and g

Discuss the concept of alpha-islet cells of the pancreas, Glycogen A. p...

Glycogen A. production in the liver increases in response to an increase in blood plasma levels of glucagon. B. is secreted by alpha-islet cells of the pancreas. C. bindi

Carbon dioxide in the atmosphere, Which part of the carbon cycle is respons...

Which part of the carbon cycle is responsible for the enhancing concentration of carbon dioxide in the atmosphere. The burning of fossilized products (coal and oil) of some pla

Hypomagnesaemic tetany , Hypomagnesaemic tetany (grass tetany, grass stagge...

Hypomagnesaemic tetany (grass tetany, grass staggers, lactation tetany) Hypomagnesaemic tetany is a multifactorial complex metabolic disorder, which is  characterized by reduct

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