Explain the ph meter - food microbiology, Biology

Assignment Help:

Explain the pH Meter - Food Microbiology?

pH is a negative logarithm of H+ ion concentration. Its value remains between 0 and 14. Pure water has a pH of 7 (neutral). pH value less than 7 is acidic and more than 7 is basic. The measurement of pH can be done by using pH meter. pH meter is used to measure and set the pH of culture media or reagents used for microbiological and biochemical assays. It is important as different microbes have different pH requirements for growth. Most of the bacteria, in general, have optimum pH for growth between 6.5 to 7.5, though there are certain exceptions.

Some bacteria are acidophiles (grow at acidic pH) or alkalophiles (needs high pH in alkaline range for growth). Most fungi have pH optima around 4 to 6 and yeasts need pH around 3 to 5. The pH meter has a glass electrode for measuring the pH. During determination of pH, first the instrument is calibrated with standard buffers of pH 4, 7 and 9. Then the pH of the sample solution is determined by dipping the glass electrode in the solution and pH is read directly from the pH meter scale.


Related Discussions:- Explain the ph meter - food microbiology

Enumerate the anatomic consequences of edentulism, Q. Enumerate the anatomi...

Q. Enumerate the anatomic consequences of edentulism? The anatomic consequences of edentulism include the effect of edentulism on bone and soft tissues. Basal bone forms the de

Whta are radial loops , When the chromosomes  are depleted  of histo...

When the chromosomes  are depleted  of histones  they  are seem  to have  a central fibrous 'protein  scaffold'  or nuclear  matrix  to which the DNA is attached  in loops. Therefo

Determine the nutritional needs of humans, Determine the nutritional needs ...

Determine the nutritional needs of humans? In the previous unit, we saw how involvement in sport or vigorous activities can affect the body's nutrient needs. In this unit, we w

Rigs pattern - types of nursing units, Rigs Pattern: The nursing unit ...

Rigs Pattern: The nursing unit has been divided into small cubicles for 1,2,4  and 6 beds.  The beds are arranged parallel to the  longitudinal wall.  The pattern was first bu

Consider a ph scale while answering, What is the relationship of hydrogen i...

What is the relationship of hydrogen ion concentration in tomato juice relative to lemon juice and to pure water? Be as quantitative as you can (i.e., use numbers to describe the m

What are the parts of a surgical needle, What are the parts of a surgical n...

What are the parts of a surgical needle. How do you classify surgical needles The surgical needle is comprised of 3 parts: the needle point, the needle body, and the swaged (pr

Historically what were the two main evolutionary theories, Historically wha...

Historically what were the two main evolutionary theories? The two major evolutionary theories were darwinism and lamarckism.

Classification, what is the kingdom,phylum,class,age of gastropoda

what is the kingdom,phylum,class,age of gastropoda

Effects of noise - noise pollution, Effects of Noise - Noise Pollution ...

Effects of Noise - Noise Pollution Noise can affect in the following three ways: Interferes with communication, Diminishes hearing and Affects health and even

Explain about functions of the lacrimal apparatus, Explain about functions ...

Explain about functions of the lacrimal apparatus. Tear Secretion Aqueous tears are secreted by the main (reflex secretion) and accessory (basic secretion) lacrimal

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