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

Female reproductive disorders-retained foetal membranes, Retained foetal me...

Retained foetal membranes The foetal membranes are normally expelled within 6to 12 hr after parturition in cows and buffaloes. If the foetal membranes are not voided even upto

Can you explain myopia and hypermetropia, Q. How can the visual deficiencie...

Q. How can the visual deficiencies known as myopia and hypermetropia be optically explained? Myopia is the visual condition in which the images are formed previous to (in front

Explain the goal of bcc for a diabetic patient, The overall goal of BCC pro...

The overall goal of BCC programs for diabetes mellitus is to promote behaviors that control diabetes mellitus and prevent complications. These include: Following treatment

Closed style - style of stigma interaction, Closed Style - Style of Stigma ...

Closed Style - Style of Stigma Interaction Cotton shows an epidermis with stomata, a cortex of thin-walled parenchyma with several vascular bundles and strands of transmitting

Define isolated soybean proteins in dairy type products, Define isolated so...

Define isolated soybean proteins in Dairy type products? Soybean protein isolates are used in non-dairy coffee whiteners, liquid whipped toppings, emulsified sour cream or chee

What are all possibilities of genotypes and phenotypes, What are all possib...

What are all possibilities of genotypes and phenotypes formed in the combination of alleles responsible for the production of factor VIII? Considering the alleles X and Xh, whe

Define the viscosity of protein, Define the Viscosity of Protein? Visco...

Define the Viscosity of Protein? Viscosity reflects resistance to flow. The main single factor influencing the viscosity behavior of protein fluids is the apparent diameter of

Ecosystem balance, Ecosystem Balance We take up, another parameter of ...

Ecosystem Balance We take up, another parameter of ecosystem balance. One factor that affects the stability or persistence of some ecosystems under small or moderate environme

Explain exotic species, Explain exotic species? Describe with the help ...

Explain exotic species? Describe with the help of two examples how the exotic species disturb the native species of an ecosystem ?

Anomalies related to oesophagus and stomach, Anomalies Related to Oesophagu...

Anomalies Related to Oesophagus and Stomach   Let us discuss briefly the anomalies of oesophagus and stomach. These are summarised as  follows: Associated Problems  1)  P

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