How do you observe bacteria in curd?

After the formation of curd, a little amount of curd is diluted and a few drops of this preparation is taken on a slide. It is allowed to dry out and then it is stained with safranin or methylene blue. The bacteria are then seen under the microscope.

How can you see bacteria?

In order to see bacteria, you will need to view them under the magnification of a microscopes as bacteria are too small to be observed by the naked eye. Most bacteria are 0.2 um in diameter and 2-8 um in length with a number of shapes, ranging from spheres to rods and spirals.

How does bacteria help in curd formation?

Lactic acid bacteria produces lactic acids by converting the milk sugars (lactose) that coagulate and partially digest the milk protein, giving rise to curd.

Which bacteria is present in yogurt?

By law, anything called “yogurt” must be made from a few common ingredients: milk, of course, plus two species of bacteria called Lactobacillus bulgaricus and Streptococcus thermophilus. (Those are the essential ingredients; yogurt can also include other bacteria, as well as fruit and flavorings.)

What is the role of bacteria in curd formation?

Curd contains several microorganisms. Of these, the bacterium Lactobacillus promotes the formation of curd. It multiplies in milk and converts it into curd. Bacteria are also involved in the making of cheese, pickles and many other food items.

What is the role of Lactobacillus in curd?

Curd contains several microorganisms. Of these, the bacterium Lactobacillus promotes the formation of curd. It multiplies in milk and converts it into curd. Bacteria are also involved in the making of cheese, pickles and many other food items. An important ingredient of rava (sooji ) idlis and bhaturas is curd. Can you guess why?

How do you observe Lactobacillus under a microscope?

How do you observe Lactobacillus under a microscope? 1 Take a very small drop of curd on the glass slide. 2 Let the smear dry. 3 Place a small drop of methylene blue solution on a microscope slide. 4 Place a coverslip on top. 5 Place the slide on the stage of the microscope starting with lower magnification.

How do you use a coverslip to find bacteria?

Place a very small portion of plain yogurt onto the slide, and add one drop of water. Place the coverslip on top. Under low power, find a section where the yogurt is pretty thin; this is where you will find the bacteria. Switch to high power (400X for most microscopes) for a better view of the bacteria.