L7 Microbes in Curdling of milk - Micro Organisms, Science, Class 8 Video

hello friends this video on
microorganism strength and for part 7 is
brought to you by exam feel calm no more
fear from exam let us start with
microbes in household now let us look at
some of the household products where
microbes play an important role so one
of these is curdling of milk like how a
skirt repelled curd is actually prepared
from milk so how this conversion of milk
takes place into curd the major role is
played by the microbes or microbes are
responsible for milk turning into curd
so curdling of milk is one such
application they think so all types of
making products whether you talk about
cake or you talk about your brain so
there also microbes play away important
roles cheese formation we all often use
cheese in our food items so this cheese
is also prepared by the action of
microbes pickles pickles which are
stored and preserved for a long time so
you would have seen your mother or your
grandmother they prepare pickle and you
store it for a very long period of time
so this because also I prepared with the
help of micro so these are some of the
household items where microbes play an
important role so we are going to
discuss about each of these and we will
see that how what role exactly is played
by microbes in each of these products so
let us first talk about code so how is
my crew playing the most important role
in current preparation so what is
courage curd contains a bacteria called
lactobacillus so this bacteria is always
present in the curve so next time
wherever you eat curd or whenever you
see curds always remember that
is a bacteria which is already present
in the curve but do you think that pot
colored is poisonous not at all in fact
curve is something which is extremely
healthy for us and we eat it so what
happens once we eat good do before Gill
no but the bad thing is already there so
the bacteria which is present inside the
curd is a friendly bacteria and it is
not a harmful bacterium that is why it
doesn't harmless so now what we have to
see is how exactly this lactobacillus
help in the process of conversion of
milk into curd so lactobacillus it is a
friendly bacteria as I said and it
treats and prevents diarrhea now forget
about the fact that it is go to harm us
it is going to help us it helps us to
prevent diagonal that is why you would
have seen that when you are suffering
from diarrhea it is prescribed or you
are advised to eat code because code cut
ends this bacteria and it will prevent
or it will treat the problem of diagram
it also helps in food breakdown now once
you eat the curd that this bacteria gets
inside your body so this factor helps in
an indirect way in the process of
digestion because in the digestion
process what happens the complex food
particles are broken now into simpler
forms so this bacteria also plays an
important role in the process of food
breakdown it also helps in absorption of
nutrients now once the food is digested
inside our body then the food is
absorbed by different parts of the body
and that's how we get energy out of the
food so this side Theory also helps in
absorption of nutrients so you see this
bacteria after getting inside our body
they help us in a number of ways so now
I'm going to see how exactly the process
of curdling takes phase that is
conversion of meth into curd
this process is called gurgling so how
this process actually happens now have
you ever seen your mother preparing curd
or having ever yourself try to prepare
code if not you can try that your home
so all you need
milk and a little bit of code maybe a
spoon of good that should be enough okay
so what you have to do is you take a
ball put some milk in that ball
now that milk should not be boiling hot
and it should not be freezing as well so
it should be little warm so you take
milk in that bowl and you add a small
amount of curd into that milk and then
you leave it overnight next morning when
you see you see that it has transformed
into curd so basically that small amount
of curd is able to convert that bowl of
milk into a bowl of curd so what exactly
happens as I said this spoon of curd
even that even though it is very small
amount of curd but that small amount
also contains the bacteria lactobacillus
so what this lactobacillus does that is
what we have to concentrate here now
even though the amount of curve which is
added is very small but this small
amount of curd contains millions of
lactobacillus and what do these
lactobacillus to these lactobacillus
they convert sugars into lactic acid and
where are sugars present no milk so here
you have milk and baked contains of
sugar called what is the sugar which is
present in milk there sugar which is
present in milk is lactose so baked
contains lactose sugar so the word lacto
is related to milk therefore the sugar
present in milk is lactose so this
lactobacillus will convert lactose into
lactic acid so basically it will convert
sugar into acid so that thick acid will
be formed now what happens when lactic
acid forms this lactic acid will
coagulate
and partially digest the milk protein
now this big the whale milk is it is
because of the presence of the various
particles in it now there is a milk
protein now
protein gets destroyed the structure of
the protein gets altered and this
alteration happens due to the formation
of lactic acid now
what happens this lactic acid due to the
formation of this acid it imparts a
sound taste to the curd so that is why
there is a big difference between the
taste of milk and a taste of curds
occurred is sergeant taste but when you
taste milk it is kind of sweet right so
you can say that milk is kind of sweet
so milk is sweet due to the presence of
sugar and Curtis are due to the presence
of acid and who converts sugar into acid
lactobacillus that is why for curdling
to take place it is extremely important
to add a small amount of curd if you do
not add that you are basically not
adding the lactobacillus bacteria and as
long as you do not add this bacteria
sugars will not get convert to acid
amber will also not turn into curd so
what happens is as the suitable
temperature like normally the room
temperature these lactobacillus they
start to grow and multiply
now as active a salos grow and multiply
what happens more and coagulation of
proteins take place as I said the milk
proteins they start coagulating
therefore the nutritional quantity
quality is also improved for example if
you compare the nutritional quality of
milk with that of curd you will see that
incurred the content of vitamin b12 is
much more than that of milk so all these
changes happens so who is responsible
for this entire change lactobacillus and
lactobacillus is a bacteria so here you
can see that this bacteria is not our
enemy instead this bacteria is our
friend it helps in preparing a better
nutritional product like curd even when
it gets inside our body it helps the
breakdown of food it helps in absorption
of nutrients it help to treat diarrhea
so there are a number of ways in which
this
bacterium's help us so this is one
example of a friendly bacteria so as I
said the increased acidity causes the
build proteins to turn into solid masses
so that is why you are milk is liquid
but when you look at the curd further
sort liquid so curd is like solid
message so this conversion happens due
to the coagulation of the milk proteins
which milk protein is less in the will
protein is season thank you please visit
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