Curcuma longa
Turmeric or Curcuma longa belongs to
Zingiberaceae family along with ginger.
It is generally found in Southeast Asia. The powder from these rhizomes
is used in Asian food for its colour and flavour. Turmeric powder is
deep-orange-yellow in colour and has a bitter, warm and pepper like flavour
with an earthy mustard like aroma.
Apart from being used in cooking, turmeric
has been a part of treatment in ancient medicines of Ayurveda, Unani and
traditional Chinese medicine. It was also used as a dye at that time. It is
also used in other products like baked products, ice cream, canned beverages,
yogurt, dairy products, orange juice, biscuits, yellow cakes, cereals, popcorn
colour and gelatin. It is used in commercial curry powders.
Turmeric has 34 essential oils including
turmerone, atlantone, zingiberene and germacrone which are its major
constituents. Turmeric powder is made up of 60-70% carbohydrates, 6-12% water,
6-8% proteins, 5-10% fats, 3-7% dietary fibre, 3-7% essential oils and 1-5%
curcuminoids. These curcuminoids include curcumin, bisdemethoxycurcumin and
demethoxycurcumin.
In ancient medicine, turmeric was used as a
treatment for disorders like throat infections, liver ailments, common cold,
cleanse wounds and treat skin sores and indigestion. It is also for wedding
purposes in Indian weddings.
Turmeric paper was also used in ancient
Germany as an indicator of acidity and alkalinity. In case of acidic solutions,
the paper remains yellow. The paper turns brown to reddish-brown in case of
alkaline solutions.
Turmeric as a dye is commonly used in Bangladesh
and India for saris and Buddhist monk’ robes. Turmeric is also used in food to
protect it from sunlight. Turmeric is
used as a colouring agent in cheese, yogurt, margarine, pickles, salad
dressings, and dry mixes. In parts of South Asia, turmeric leaves are also used
to wrap and cook food. In these areas turmeric is grown and its leaves are
freshly picked for cooking purpose.
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