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

minerals, Minerals Minerals are chemical elements needed by the body ei...

Minerals Minerals are chemical elements needed by the body either to help form bodily structures or to facilitate chemical reactions. Dietary minerals are divided into two categ

Which are plant tissues that cover the stem and the leaves, Which are plant...

Which are plant tissues that cover the stem and the leaves? The stem perhaps covered by epidermis (having stomata, cuticle and photosynthetic cells) as in monocots or, alternat

Why physiological cause of the syndrome called as cretinism, Q. What is the...

Q. What is the physiological cause of the syndrome Called as cretinism? Cretinism is caused by chronic deficiency of the thyroid hormones (T4and T3) during childhood. The chron

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

How formation of gametes begin in women, In which period of life does the f...

In which period of life does the formation of gametes begin in women? The meiosis that forms female gametes begins in the cells of the ovarian follicles before birth. After the

Colony collapse disorder in honey bees, Q. Colony collapse disorder in hone...

Q. Colony collapse disorder in honey bees? Honey bees (Apis mellifera) are social insects and live in colonies in hives. Honey bees were introduced from Europe to the USA to po

What is myoglobin, What is myoglobin? What is the function of this molecule...

What is myoglobin? What is the function of this molecule in the muscle tissue? Myoglobin is a pigment same to hemoglobin and present in muscle fibers. Myoglobin has a great af

Zoology, Classification of the Phylum Protozoa up to orders

Classification of the Phylum Protozoa up to orders

What is the menstrual cycle, Q. What is the menstrual cycle? The menstr...

Q. What is the menstrual cycle? The menstrual cycle is the periodic succession of interactions between the organs and hormones of the female reproductive system after the begin

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