calendaradsa

7/28/2019 Calendaradsa

1/12

J A N U A R Y 2013Did you know?

Did you know that

colloids play an

important role in our

daily life and industry?

A knowledge of colloid

chemistry is essential

to understand some of

the various natural

phenomena around

us. Colloids make up

some of our modern

products such as food

and medicines.

SUNDAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY

1 2 3 4 5

6 7 8 9 10 11 12

13 14 15 16 17 18 19

20 21 22 23 24 25 26

27 28 29 30 31


2/12

F E B R U A R Y 2013Did you know?

Did you know that a

colloid is a substance

microscopicallydispersed evenly

throughout another

substance.


1 2

3 4 5 6 7 8 9

10 11 12 13 14 15 16

17 18 19 20 21 22 23

24 25 26 27 28


3/12

M A R C H 2013Did you know?

Did you know that a

colloidal system

consists of two

separate phases: a

dispersed phase (or

internal phase) and a

continuous phase (or

dispersion medium) in

which the colloid is

dispersed. A colloidal

system may be solid,

liquid or gas.


1 2

3 4 5 6 7 8 9

10 11 12 13 14 15 16

17 18 19 20 21 22 23

24 25 26 27 28 29 30

31


4/12

A P R I L 2013Did you know?

Did you know that

colloids can be

distinguished from

solutions using the

Tyndall effect. A beam

of light passing

through a true

solution, such as air is

not visible. Light

passing through a

colloidal dispersion

will be reflected by

the larger particles

and the light beamwill be visible.


1 2 3 4 5 6

7 8 9 10 11 12 13

14 15 16 17 18 19 20

21 22 23 24 25 26 27

28 29 30


5/12

M A Y 2013Did you know?

Did you know that a

colloidal system

contains particles thataffect a light beam by

scattering and

absorption.


1 2 3 4

5 6 7 8 9 10 11

12 13 14 15 16 17 18

19 20 21 22 23 24 25

26 27 28 29 30 31


6/12

J U N E 2013Did you know?

Did you know that

colloids can produce

color. The red of a

gold sol or ruby glass

is an example, wherethe color is due to the

wavelength

dependence of

scattering and

absorption.


1

2 3 4 5 6 7 8

9 10 11 12 13 14 15

16 17 18 19 20 21 22

23 24 25 26 27 28 29

30


7/12

J U L Y 2013Did you know?

Did you know that the

dull term colloidthat

reminds us of glue is,

nevertheless, the

accepted word. It wascoined in the early

19th century by the

Father of Physical

Chemistry, Thomas

Graham.


1 2 3 4 5 6

7 8 9 10 11 12 13

14 15 16 17 18 19 20

21 22 23 24 25 26 27

28 29 30 31


8/12

A U G U S T 2013Did you know?


smoke coming from

industrial plants is acolloidal dispersion of

solid particles in air. It

is a nuisance and

pollutes the

atmosphere.


1 2 3

4 5 6 7 8 9 10

11 12 13 14 15 16 17

18 19 20 21 22 23 24

25 26 27 28 29 30 31


9/12

S E P T E M B E R 2013Did you know?

Did you know that

many of our foods are

colloidal in nature. For

example, ice cream is

a dispersion of ice incream. Another

example would be,

bread is a dispersion

of air in baked dough.


1 2 3 4 5 6 7

8 9 10 11 12 13 14

15 16 17 18 19 20 21

22 23 24 25 26 27 28

29 30


10/12

O C T O B E R 2013Did you know?

Did you know that

colloidal medicines

being finely divided,

are more effective and

are easily absorbed inour system.

Antibiotics such as

penicillin and

streptomycin are

produced in colloidal

form suitable for

injections.


1 2 3 4 5

6 7 8 9 10 11 12

13 14 15 16 17 18 19

20 21 22 23 24 25 26

27 28 29 30 31


11/12

N O V E M B E R 2013Did you know?


municipal water

obtained from natural

sources often

contains colloidal

particles. The process

of coagulation is used

to remove these.


1 2

3 4 5 6 7 8 9

10 11 12 13 14 15 16

17 18 19 20 21 22 23

24 25 26 27 28 29 30


12/12

D E C E M B E R 2013Did you know?

Did you know thatSUNDAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY

1 2 3 4 5 6 7

8 9 10 11 12 13 14

15 16 17 18 19 20 21

22 23 24 25 26 27 28

29 30 31

calendaradsa

Documents