Elements necessary for humans

At present there are 118 elements listed in the periodic table. Some of these elements are commonly found on the earth in the form of ores. Some are radioactive and have very short half lives. Many such elements have been synthesized in the laboratory and live for a very short time.

Human body like other things existing is made of compounds which are made from the elements. Out of these 118 only some elements are connected with the human body.

Although elements as such don’t make up the body it is the combined form that is molecules constitute the human body. But elemental composition is as follows by mass.

Oxygen: 65%

Carbon: 18%

Hydrogen: 10%

Nitrogen: 3%

Other elements: 4%

Other elements include Calcium, Potassium, Phosphorus, Sulphur, Sodium, Chlorine, Magnesium, Boron, Chromium, Cobalt, Copper,  Fluorine, Iodine, Iron, Manganese, Molybdenum, Selenium, Silicon, Tin, Vanadium and Zinc.

Although these elements are used in very minor amount, they are crucial to some body processes.

Elements can be divided into different groups according to the functions they perform.

Building Blocks

The main building blocks of the body are proteins which are synthesized from amino acids. For these elements used are Hydrogen, Carbon, Nitrogen, Oxygen, Phosphorus and Sulphur. DNA also contains these elements except Sulphur. DNA is the genetic code.


Enzymes are chemicals which are catalysts for carrying out chemical reactions like breakdown of sugars and other macro molecules. Such enzymes use some elements like Magnesium, Manganese, Copper, Zinc, Selenium and Molybdenum. Enzymes play role in respiration, digestion, metabolism and immune system.

Nerves and Control

Brain sends messages to different parts of the body and this is a two way communication. Electrical signals are carried through electrolytic solutions like brines. Sodium, Potassium and Calcium ions this play the role of transmitting the signals. Similarly Chloride ions regulate the water in and out of cells. Iodine is used to make hormones which regulate metabolism.

Bones and Teeth

Bones make the template on which our body is hoisted. Strong bones and teeth are essential for the healthy body.  Bones and Teeth are made of Calcium and phosphate. Phosphate contains Phosphorus and Oxygen. Manganese element makes more stronger and resistance to breaking.


Blood is the lifeline of the body. Blood carries oxygen to the cells and removes the carbon-dioxide gas which is the byproduct of combustion reaction. Oxygen is carried by blood due to the presence of iron which binds the Oxygen. Other elements which are constituents of blood are Carbon, Oxygen, Iron and Cobalt. Cobalt is essential to make red blood cells.

Respiration and Energy

Respiration is inhalation of Oxygen. Adinosine Triphosphate (ATP) is formed during respiration which is the compound used by body as energy. Main elements involved here are Carbon, Nitrogen, Phosphorus and Oxygen.

Source: c&en magazine of American Chemical Society (ACS)


Mango : The King of Fruits

Hiuen Tsang, after being in India is going back. Time AD 627-643, on the fabled Silk Route. Apart from his knowledge of Buddhism, his rucksack contains an extraordinary fruit called Mango.

The name in hindi AAM is derived from Sanskrit word AMRA which seems to be the loan from Dravidian and is related to Tamil words for Mango like “mamaram”. Portuguese were responsible for transferring the name to the West. It is growing in India since 4000 years at least.

Moguls were great connoisseurs of the fruit. Akbar got 100000 mango trees in Lakhi Bagh near Darbhanga Bihar. Others who relished the fruit were Shahjahan and Noor Jehan, Aurangzeb, Sher Shah Suri. Raghunath Peshwa got large numbers all over Maharashtra.

Main Constituents:

Citric acid and related compounds are responsible for sour taste. Several terpenes have been found in unripe fruit..

Ripe mango contains volatile compounds like alpha terpineol, ocimene, limonene, 3-carene etc. Yellow colour is due to beta Carotene.


Mangoes are rich in potassium, about 8% carbohydrate with 1.6 % dietary fibre. Very rich in vitamin A , C, B-6, calcium, iron, and magnesium.

Some famous Indian Varieties:

1: Alphonso or Hapoos
King among the mangoes. Named after Portugal admiral D Afonso de Albuquerque. Deogad in Ratnagiri district of Maharashtra has got the GI tag of genuineness.


2: Dasehri
It is birth place is Malihabad in Lucknow. Soft, succulent and mild.

3: Banarasi Langda
It was born in an orchard belonging to a Langda (lame) fellow and thus got this name.

4: Himsagar
Fibre less, creamy and full of pulp. Pride of Murshidabad in West Bengal.

5: Fazli
Quite big in size, famous in Malda of West Bengal. Late maturing.

6: Chaunsa:
From Bihar. Full of Flavour. It is pressed into mouth and juice is sucked.

7: Gulab Khaas
Native of Jharkhand. It is graceful mango

8: Kesar

Aromatic fruit of Junagadh Gujarat. Giving a tough fight to Hapoos. Plantations are on foothills of mount Girnar.


9: Bedmi: Taste depends upon the plucking time.

10. Totapuri: it is abundant in southern states of Andhra Pradesh, Tamil Nadu, Karnataka.

11: Sindoori: it gets its name from the vermillion colour of the skin.

12: Banganapalli/ Bagan Phali/ Safeda
From Andhra’s small town Banganapalli. Sweet, yellow and fibre less.

13: Himam Pasand/ Humayun Pasand
A cross made from Banganapalli and Malgoa. It is very popular in Deccan.

14: Chandrakaran: it is delicacy from Kerala. Sweet and sour. Quite costly.