Preparation of soybean milk and its comparison with the natural milk with respect to curd formation effect of temperature etc?

Answer 1

Project on preparation soyabean milk and its comparison with the natural milk

This is to certify that Master Hiren P Patel ,A student of class XII of the Atomic Energy Central School, Roll No.: 07 session 2009-2010, has satisfactorily completed the required chemistry project work as per the syllabus of Standard XII in the laboratory of the school.

Date: Chemistry Teacher

(Mr.R K Sawhney)

Principal's Signature External examiner's Signature

I selected this project as a part of my studies, titled "PREAPARATION OF SOYABEAN MILK AND ITS COMPARISION WITH NATURAL MILK".

As a gratitude, I convey my sincere thanks to Mr.R K Sawhney and Lab. Assistant Smt. Raksha Pandya who was the constant guide during the period of study and without whose help it would not have been possible for us to complete this project.

HIREN P PATEL

XII-B (SCIENCE)

2009-2010

Project 55:

Aim:

Preparation of soya bean milk and its comparison with the natural milk with respect to curd formation, effect of temperature and taste.

Theory:

• Natural milk is an opaque white fluid secreted by the mammary glands of female mammal.
• The main constituents of natural milk are proteins, carbohydrates, minerals, vitamins, fats and water and are a complete balanced diet.
• Fresh milk is sweetish in taste.
• • However, when it is kept for a long time at a temperature of 35 ± 50C it becomes sour because of bacteria present in air.
  • These bacteria convert lactose of milk starts separating out as a precipitate.
  • • When the acidity in milk is sufficient and temperature is around 360C, it forms semi-solid mass, called curd.
    • Soya bean milk is made from soya beans.
    • It resembles natural milk.
    • • The main constituents of soya bean milk are proteins, carbohydrates, fats, minerals and vitamins.
      • It is prepared by keeping soya beans dipped in water for sometime.
      • • The swollen soya beans are then crushed to a paste which is then mixed with water.
        • The solution is filtered and filtrate is soya bean milk.

Materials required:

Beakers, pestle and mortar, measuring cylinder, glass-rod, tripod-stand, thermometer, muslin cloth, burner.

Soya beans, buffalo milk, fresh curd, distilled water.

Procedure:

• Soak about 100 g of soya beans in sufficient amount of water for 24 hours.
• • Take out swollen soya beans and grind them to a very fine paste with a pestle-mortar.
  • Add about 250 ml of water to this paste and filter it through a muslin cloth.
  • Clear white filtrate is soya bean milk.
  • Compare its taste with buffalo milk.
  • • Take 50 ml of buffalo milk in three beakers and heat the beakers to 300, 400 and 500 C respectively.
    • Add spoonful curd to each of the beakers and leave the beakers undisturbed for 8 hours and curd is ready.
    • Similarly, take 50 ml of soya bean milk in three other beakers and heat the beakers to 300,400 and 500 C respectively.
    • Add 1 spoonful curd to each of these beakers. Leave the beakers

4 undisturbed for 8 hours and curd is formed.

Type of milk

Beaker no

Temperature

Quality of curd

Taste of curd

Buffalo milk

1

300C

2

400C

3

500C

4

300C

Soya bean milk

5

400C

6

500C

Result: For buffalo milk, the best temperature for the formation of good quality and tasty curd is… oC and for soya bean milk, it is …. oC.

Answer 2

It is hard to compare soy milk with natural milk because natural is not specifically defined in relation to foods.

Either milk could contain genetically modified ingredients. Most soybeans that are grown in the United States are genetically modified and cow's milk could come from cows that were given rGBH or other hormones.

Both could be organic, in which case, neither would contain any of the above.

In either case, soy milk would not contain lactose, so lactose intolerance associated with cow's milk would not be an issue.

Answer 3

To prepare soybean milk to compare with natural milk and curd formation, you must first prepare the milk by soaking, pulverizing, and filtering soybeans to make milk without any additives. You must then have multiple beakers filled with each liquid for control and test subjects. All data should be monitored and documented to discover the links between milk and curd formation.

Answer 4

curd formed at lower temp will have better quality

Answer 5

It can't be both - either it is soy or it is real milk.

Answer 6

it will melt