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Wednesday, January 19, 2011

January Quiz

Civilserviceindia.com
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We are starting of the year 2011 on a positive and bright note and hope this year brings in good luck and a lot of happiness to all you readers. We hope all your hard work pays off and helps you succeed in all your endeavors. So let’s not waste any more time and put in the required efforts to make this New Year a grand success!!!
The current poll is Do you think UPA government will form Telangana state? We hope all of you participate and post your comments helping each other broaden your horizons.
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    Do you think UPA government will form Telangana state?
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Civilserviceindia.com Article of the Month
The Telangana Issue
 
Telangana issue has been generating a lot of news for the past couple of years. It’s an issue about which many people have been very passionate and has led to the loss of many lives. Infact the Telangana issue has been around for over many years now. Here is a look at what has happened over the years and why the Telangana issue still stands unsolved as it does today. What is Telagana?
Telangana is a region in Andhra Pradesh and was originally a princely state, ruled by the erstwhile Nizam of Hyderabad. Andhra Pradesh today as it stands, can be divided into three regions – Telangana, Rayalaseema and Coastal Andhra.

The Telangana region comprises of districts in Western and Central Andhra Pradesh (Adilabad, Karimnagar, Nizamabad, Medak, Warangal, Khammam, Hyderabad, Rangareddy, Nalgonda, and Mahaboobnagar) It comprises 10 of Andhra Pradesh’s 23 districts. It accounts for 119 seats out of the 294 seats in Assembly.

Telegana at the time of Independence
After Independence, the Nizam of Hyderabad wanted to retain his hold over the state. But the Government of India had other plans and amalgamated his state on 17th September 1948 by force. On a historic note, Rayalseema and Coastal Andhra were part of the Madras Province under the British Empire. However post independence Rayalaseema and Coastal Andhra were separated from the Madras State in 1953 and were merged with the Telangana region of Hyderabad in 1956 to form the state of Andhra Pradesh. The remaining parts of the Telangana region were merged with Karnataka and Maharashtra. This was the first state that was carved out on linguistic lines in the country.

Demands for a separate Telangana State
Demands for carving out a separate Telangana State became more buoyant during 1969. There are quite a few reasons for this:-

  • There were distinct differences between Telangana and Andhra Regions.
  • Andhra that was initially a part of Madras presidency had much better standards of development and education. Telangana on the other hand was more feudal in its approach and much less developed.
  • The Telangana people had reservations also because they feared they would lose out on many jobs with the merger
  • The cultural differences too were apparent. Under the rule of the Nizam the Telangana region bore influences of Northern India. The kind of festivals being celebrated too was different.

The 1969 Agitation
This was primarily a student protest which erupted in the regions of Telangana with Osmania Univeristy proving to be the hot bed of it all. The protests became massive with huge numbers of people taking part in the agitation. Over 350 people lost their lives in lathi charge and police firing. Former Congress leader Channa Reddy who defected to form his own party the ‘Telangana Praja Samithi’ later diluted the impact of the agitation as he merged with the Congress. Channa Reddy was also the same person responsible for raising slogans like ‘Jai Telangana’. The Prime Minister Indira Gandhi later went on to make him the Chief Minister after which the movement collapsed. After this P.V Narasimha Rao was also made the Chief Minister in 1971. He was also from the Telangana region.

The role of K Chandrasekhar Rao
K Chandrasekhar Rao was a member of the Telugu Desam Party (TDP) during the 1990’s. While hoping for a ministerial birth he only got that of a deputy speaker following the 1999 elections. KCR quit TDP in 2001 and set about to form the Telangana Rashtra Samithi (TRS) which he announced would fight for the formation of a separate Telangana State. The timing could not have been more perfect for KCR considering the fact the people of Telangana were already feeling looted. There was already a strong feeling gaining ground that the surplus produced by them was being rerouted to the finance body so that it could be used to develop the rest of the state.

In the elections of 2004 YS Rajashekara Reddy and KCR decided to join hands after YSR promised him the formation of a separate Telangana State. But later YSR backtracked and sent a report to the Congress against the formation of the Telangana State. TRS withdrew support from the Congress led coalition government on the grounds of alleged indecision by the government over the delivery of its electoral promise to create a separate Telangana state.
Soon the Telangana also ended up being a deeply political issue. Parties could often be seen flip flopping on their stand on the Telangana issue. The Congress and TDP are a divided house while Praja Rajyam and CPM are for a united Andhra. On the other hand the BJP and CPi are supporting the formation of s separate Telangana.
On November 29, 2009, KCR took a fast until death demanding that the Congress Government introduce the Telangana bill in the parliament. Student’s rallies and people from various organizations took part in the demands and there were massive protests in many regions of Telangana. With KCR’s health fast failing the centre was forced to look into issue and finally gave into his request of a separate state making KCR end his 11 day fast.
Srikrishna committee headed by Justice BN Srikrishna was then set up to look into wether a separate state should be carved out or a united Andhra must remain. The committee was constituted by the Government of India in 3 February 2010 and expected to submit its report on 30 December 2010 to the Ministry of Home Affairs. As part of the committee they invited people from all sections of the society and also toured the entire state where they got the opinions of a lot of people on what they felt about the issue. The SriKrishna Report was released on the internet to the public on 6 January 2011.
The issue is still being contemplated in the political circles.

Friday, January 14, 2011

Chemical Elements

 http://nicholasacademy.com/pictures/elementschart1.jpg

Important Laws in Chemistry





Boyle's Law

http://z.about.com/d/chemistry/1/0/p/o/Boyles_Law_animated.gif

 It states that when any gas is expanded or compressed at constant temperature, its volume (V) and pressure (P) are inversely proportional to each other.
P ∞ 1/V (or) PV = constant

Charle's Law

http://wpcontent.answers.com/wikipedia/commons/thumb/e/e4/Charles_and_Gay-Lussac%27s_Law_animated.gif/220px-Charles_and_Gay-Lussac%27s_Law_animated.gif
It states that when any gas is expanded or compressed at constant pressure, its volume (V) is directly proportional to its absolute temperature T.

V ∞ T (or) V/T = contant (or) V1/T1 = V2/T2

Dalton's Law of Partial Pressure
It states that the total pressure exerted by a mixture of different gases in a given space is equal of sum to partial pressure of each constituent gas where partial pressure of a gas is the pressure exerted by it, if it were to occupy the same space alone.
P = P1 + P2 + P3 +...

Law of Indestructibility
It states that matter can neither be created nor destroyed by any chemical change.

Law of Multiple Proportion
It states that when two elements combine to form more than one compound, the mass of one which combines with the fixed mass of the other bears a simple ratio to each other.

Law of Reciprocal Proportion (or Law of Equivalent Proportions)
It states that when two different elements combine with the same weight of third element the ratio in which they do so will be the same or some multiple of the ratio in which they combine with each other, e.g., The elements C and H combine with the third element O to form CO2 and H20. Also they combine directly to form CH4 :
In CO2 ⇒ C : = 12 : 32 = 3 : 8
In H2O ⇒ H : O = 2 : 16 = 1 : 8
i.e., from this the ratio C : H = 3 : 1, Now in,
CH4 ⇒ C : H = 12 : 4 = 3 :1

Law of Constant Composition
It states that a chemical compound always consists of same elements combined together in the same proportion by mass.

Gay Lussac's Law of Combining Volumes
It states that gases react together in volumes which bear simple and whole number ratios to one another as well as to the volumes to the gaseous products whereas the volumes being measured under same conditions of temperature and pressure.

Law of Mass Action
It states that the rate of chemical reaction is proportional to the molecular concentration of each of reacting constituents.

Faraday's Law of Electrolysis

  1. The products of electrolysis appear only at the electrodes, having weight proportional to the quantity of electricity passed.

  2. The amounts of ions liberated at the various electrodes are proportional to their chemical equivalents when current passes through the different electrolytes.

Ohm's Law
It states that the magnitude of current flowing between two ends of a conductor is proportional to the potential difference between them.

Avogadro's Law
It states that under similar conditions of temperature and pressure equal volume of all gases contain equal number of molecules.

Raoult's Law
It states that the vapour pressure of a solution containing non - volatile solution is directly proportional to the mole fraction of the solvent.
PA = P°A . XA, PB = P°B . XB, ΔHmix = +ive, ΔV = +ive
The solutions which obey Raoult's law are called Ideal Solutions

  1. When solvent - solvent and solute - solute interactions are stronger than solvent - solute interaction positive deviations take place.


    PA > P°A . XA, PB < P°B . XB, ΔHmix = +ive, ΔV = +ive

  2. When solvent - solvent and solute - solute interactions are weaker than solvent - solute interaction negative deviation takes place.


    PA < P°A . XA, PB < P°B . XB, ΔHmax = -ive, ΔV = -ive

Chemical Names of Common Substances

Chemical Names of Common Substances
Alternate Words for Familiar Materials Chemical or scientific names are used to give an accurate description of a substance's composition. Even so, you rarely ask someone to pass the sodium chloride at the dinner table. It's important to remember that common names are inaccurate and vary from one place and time to another. Therefore, don't assume that you know the chemical composition of a substance based on its common name. This is a list of archaic names and common names for chemicals, with their modern or IUPAC equivalent name.

Common Name Chemical Name
acetone dimethyl ketone; 2-propanone (usually known as acetone) 
acid potassium sulfate potassium bisulfate 
acid of sugar oxalic acid 
ackey nitric acid 
alcali volatil ammonium hydroxide 
alcohol, grain ethyl alcohol 
alcohol sulfuris carbon disulfide 
alcohol, wood methyl alcohol 
alum aluminum potassium sulfate 
alumina aluminum oxide 
antichlor sodium thiosulfate 
antifreeze ethylene glycol 
antimony black antimony trisulfide 
antimony bloom antimony trioxide 
antimony glance antimony trisulfide 
antimony red (vermillion) antimony oxysulfide 
aqua ammonia aqueous solution of ammonium hydroxide 
aqua fortis nitric acid 
aqua regia nitrohydrochloric acid 
aromatic spirit of ammonia ammonia in alcohol 
arsenic glass arsenic trioxide 
azurite mineral form of basic copper carbonate 



asbestos magnesium silicate 
aspirin acetylsalicylic acid 
baking soda sodium bicarbonate 
banana oil (artificial) isoamyl acetate 
barium white barium sulfate 
benzol benzene 
bicarbonate of soda sodium hydrogen carbonate or sodium bicarbonate 
bichloride of mercury mercuric chloride 
bichrome potassium dichromate 
bitter salt magnesium sulfate 
black ash crude form of sodium carbonate 
black copper oxide cupric oxide 
black lead graphite (carbon) 
blanc-fixe barium sulfate 
bleaching powder chlorinated lime; calcium hypochlorite 
blue copperas copper sulfate (crystals) 
blue lead lead sulfate 
blue salts nickel sulfate 
blue stone copper sulfate (crystals) 
blue vitriol copper sulfate 
bluestone copper sulfate 
bone ash crude calcium phosphate 
bone black crude animal charcoal 
boracic acid boric acid 
borax sodium borate; sodium tetraborate 
bremen blue basic copper carbonate 
brimstone sulfur 
burnt alum anhydrous potassium aluminum sulfate 
burnt lime calcium oxide 
burnt ochre ferric oxide 
burnt ore ferric oxide 
brine aqueous sodium chloride solution 
butter of antimony antimony trichloride 
butter of tin anhydrous stannic chloride 
butter of zinc zinc chloride 
calomel mercury chloride; mercurous chloride 
carbolic acid phenol 
carbonic acid gas carbon dioxide 
caustic lime calcium hydroxide 
caustic potash potassium hydroxide 
caustic soda sodium hydroxide 
chalk calcium carbonate 
Chile saltpeter sodium nitrate 
Chile nitre sodium nitrate 
Chinese red basic lead chromate 
Chinese white zinc oxide 
chloride of soda sodium hypochlorite 
chloride of lime calcium hypochlorite 
chrome alum chromic potassium sulfate 
chrome green chromium oxide 
chrome yellow lead (VI) chromate 
chromic acid chromium trioxide 
copperas ferrous sulfate 
corrosive sublimate mercury (II) chloride 
corundum (ruby, sapphire) chiefly aluminum oxide 
cream of tartar potassium bitartrate 
crocus powder ferric oxide 
crystal carbonate sodium carbonate 
dechlor sodium thiophosphate 
diamond carbon crystal 
emery powder impure aluminum oxide 
epsom salts magnesium sulfate 
ethanol ethyl alcohol 
farina starch 
ferro prussiate potassium ferricyanide 
ferrum iron 
flores martis anhydride iron (III) chloride 
fluorspar natural calcium fluoride 
fixed white barium sulfate 
flowers of sulfur sulfur 
'flowers of' any metal oxide of the metal 
formalin aqueous formaldehyde solution 
French chalk natural magnesium silicate 
French vergidris basic copper acetate 
galena natural lead sulfide 
Glauber's salt sodium sulfate 
green verditer basic copper carbonate 
green vitriol ferrous sulfate crystals 
gypsum natural calcium sulfate 
hard oil boiled linseed oil 
heavy spar barium sulfate 
hydrocyanic acid hydrogen cynanide 
hypo (photography) sodium thiosulfate solution 
Indian red ferric oxide 
Isinglass agar-agar gelatin 
jeweler's rouge ferric oxide 
killed spirits zinc chloride 
lampblack crude form of carbon; charcoal 
laughing gas nitrous oxide 
lead peroxide lead dioxide 
lead protoxide lead oxide 
lime calcium oxide 
lime, slaked calcium hydroxide 
limewater aqueous solution of calcium hydroxide 
liquor ammonia ammonium hydroxide solution 
litharge lead monoxide 
lunar caustic silver nitrate 
liver of sulfur sufurated potash 
lye or soda lye sodium hydroxide 
magnesia magnesium oxide 
manganese black manganese dioxide 
marble mainly calcium carbonate 
mercury oxide, black mercurous oxide 
methanol methyl alcohol 
methylated spirits methyl alcohol 
milk of lime calcium hydroxide 
milk of magnesium magnesium hydroxide 
milk of sulfur precipitated sulfur 
"muriate" of a metal chloride of the metal 
muriatic acid hydrochloric acid 
natron sodium carbonate 
nitre potassium nitrate 
nordhausen acid fuming sulfuric acid 
oil of mars deliquescent anhydrous iron (III) chloride 
oil of vitriol sulfuric acid 
oil of wintergreen (artificial) methyl salicylate 
orthophosphoric acid phosphoric acid 
Paris blue ferric ferrocyanide 
Paris green copper acetoarsenite 
Paris white powdered calcium carbonate 
pear oil (artificial) isoamyl acetate 
pearl ash potassium carbonate 
permanent white barium sulfate 
plaster of Paris calcium sulfate 
plumbago graphite 
potash potassium carbonate 
potassa potassium hydroxide 
precipitated chalk calcium carbonate 
Prussic acid hydrogen cyanide 
pyro tetrasodium pyrophosphate 
quicklime calcium oxide 
quicksilver mercury 
red lead lead tetraoxide 
red liquor aluminum acetate solution 
red prussiate of potash potassium ferrocyanide 
red prussiate of soda sodium ferrocyanide 
Rochelle salt potassium sodium tartrate 
rock salt sodium chloride 
rouge, jeweler's ferric oxide 
rubbing alcohol isopropyl alcohol 
sal ammoniac ammonium chloride 
sal soda sodium carbonate 
salt, table sodium chloride 
salt of lemon potassium binoxalate 
salt of tartar potassium carbonate 
saltpeter potassium nitrate 
silica silicon dioxide 
slaked lime calcium hydroxide 
soda ash sodium carbonate 
soda nitre sodium nitrate 
soda lye sodium hydroxide 
soluble glass sodium silicate 
sour water dilute sulfuric acid 
spirit of hartshorn ammonium hydroxide solution 
spirit of salt hydrochloric acid 
spirit of wine ethyl alcohol 
spirits of nitrous ether ethyl nitrate 
sugar, table sucrose 
sugar of lead lead acetate 
sulfuric ether ethyl ether 
talc or talcum magnesium silicate 
tin crystals stannous chloride 
trona natural sodium carbonate 
unslaked lime calcium oxide 
Venetian red ferric oxide 
verdigris basic copper acetate 
Vienna lime calcium carbonate 
vinegar impure dilute acetic acid 
vitamin C ascorbic acid 
vitriol sulfuric acid 
washing soda sodium carbonate 
water glass sodium silicate 
white caustic sodium hydroxide 
white lead basic lead carbonate 
white vitriol zinc sulfate crystals 
yellow prussiate of potash potassium ferrocyanide 
yellow prussiate of soda sodium ferrocyanide 
zinc vitriol zinc sulfate 
zinc white zinc oxide 

Terminolgy watch

1. The study of human populations, including their size, growth, density and distribution as well as statistics regarding birth, marriage, disease and deathDemography
2. The study of the formation and structure of the features of the surface of the Earth or another planet’s surfaceGeomorphology
3. The study of the properties, distribution, use and circulation of the earth’s water and the atmosphere in all of its formsGeology
4. Scientific study of oceansOceanography
5. The study of life in prehistoric times by using fossilsPaleontology
6. The study of rocks with respect to their occurrence, structure, origin, history, and mineral content
Petrology
7. Science deals with the production and study of Maps and chartsCartography
8. The study and description or mapping of the entire world or the universe is calledCosmography
9. The study of biological function and mechanics, and the application of them to machine design is calledBionics
10. A branch of zoology dealing with the study of sea shells and the animals that inhabit them is calledConchology
11. The scientific study of climatesClimatology
12. The study of, or the science of determining, the order in which things occurChronology
13. The study of recurring cycles of events in the natural worldChronobiology
14. The application of statistical techniques to biological studiesBiometry
15. The scientific study of the chemical substances, processes, and reactions that occur in livingBiochemistry
16. The study of Crimes, Criminals and the punishment of criminals is calledCriminology
17. The preparation of maps in which specific areas or regions are delineated and often highlightedChorography
18. The scientific study of Bacteria is calledBacteriology
19. Study of projectiles is calledBallistics
20. The study of the physical properties, origin, and development of celestial objects and events is calledAstrophysics
21. The scientific study of ancient cultures through the examination of their material remainsArchaeology
22. The cultivation of trees and shrubs for study, ornamentation, or profitArboriculture
23. The branch of science that studies the physical structure of animals, plants, and other organisms
Anatomy
24. The branch of botany concerned with the scientific study of algaeAlgology or Phycology
25. The scientific study of the universe, especially of the motions, positions, sizes, composition, and behavior of celestial objects is calledAstronomy
26. The branch of statistics that deals with gas in equilibrium and with gases and bodies in them is calledAerostatics
27. The branch of meteorology concerned with the study of cloudsNephology
28. The study of the positions of the Moon, Sun, and other planets in the belief that their motions affect human beingsAstrology
29. The branch of medicine concerned with the study and treatment of diseases of the kidneysNephrology
30. The scientific study of Earth’s atmosphere especially its patterns of climate and weatherMeteorology
31. The scientific study of units of measurementsMetrology
32. The relationship between organism and its environment is calledEcology
33. The science that deals with all forms of life, including their classification, physiology, chemistry, and interactionsBiology
34. The branch of geology that examines the formation and structure of the features of the surface of the Earth or another planet’s surfaceGeomorphology
35. .....is the science of the intricate series of relationship between living organisms and their living and non living surroundingsEcology

37.Bibliography given in a research report helps :those interested in further research and studying the problem from another angle
38. The scientific study of lakes and other bodies of fresh water, including their physical and biological featuresLimnology
39. The study of the bumps on the outside of the skull, based on the now discredited theory that these bumps reflect somebody’s characterPhrenology
40. The science or study of drugs isPharmacology
41. Cultivation of flowersFloriculture
42. The keeping of bees, especially for commercial purposesApiculture
43. The science or practice of growing grapevines, especially for wine makingViticulture
44. The controlled breeding, hatching, and rearing of fish, especially for scientific or commercial purposesPisciculture


46.  The branch of anatomy concerned with the study of the structure and functions of bonesOsteology
47. The scientific study of sleep or hypnosisHypnology
48. The study of characteristics of rocks isLithology
49. The study of fishIchthyology
50. The science in which chemicals are used for the treatment of diseases is known asChemotherapy

Scientist Watch

PROMINENT SCIENTISTS

 

Abdul Kalam, Dr A.P.J.: is credited with advancement of missile technology in India. He was honoured with Bharat Ratna award on November 26, 1997. He is known as “father of India’s Missile Technology”. Elected 11th President of India.

Alvares, Luis W.: is an American physicist teaching at theUniversity of California, Berkeley,U.S.A. He won theNobel Prize for Physics in 1968 for an important breakthrough he made in elementary physics in 1960 when he discovered a new resonance particle—a discovery that shattered the then prevailing notions as to how matter was built.

Anfinsen, Dr Christian B.: of the U.S.A.’s National Institute of Health, Bethseda, Maryland was one of the three co-winners of the Nobel Prize inChemistry, 1972.

Archimedes: Greek mathematician (born in Sicily) who lived about 250 B.C. is known for the discovery of the Archimedes’ principle viz., The volume of any insoluble solid can be found by noting its loss of weight when immersed in water. He is also credited with the invention of Archimedean Screw, a cylindrical device for raising water.

Arrow, Kenneth, J.: of Harvard University, U.S.A. is co-winner of the Nobel Prize forEconomics, 1972 withSir John Richard Hicks of Oxford University. The two men are known for their pioneering contributions to general economic equilibrium and welfare theories.

Aryabhatta: (A.D. 476-520) after whom India’s first scientific satellite has been named, was a great Indian astronomer and mathematician. Among his important contributions are the recognition of the importance of the mov ement of the earth round the sun, determination of the physical parameters of various celestial bodies, such as diameter of the earth and the moon. He laid the foundations of algebra and was responsible for pointing out importance of “zero”.

Avogadro, Amedeo: (1776-1856) Italian physicist; founder of Avogadro’s hypothesis: “Equal volumes of all gases under similar conditions of temperature and pressure, contain equal  number of molecules.” He also defined a molecule.

Bardeen, Prof John: of the University of Illinois (U.S.A.) is co-winner of the Nobel Prize for Physics, 1972 (with Prof Leon N. Cooper and ProfJohn Robert Schrieffer) for researches into the “theory of super-conductivity” usually called the BCS theory.

Barnard, Christian: South African surgeon who shot into world news in December 1967 when he completed the first heart transplant operation on Louis Washkansky.

Beadle, Dr G.: American scientist awarded Nobel Prize formedicine in 1958 for his work concerning the actual basis of heredity—the way in which characteristics are transmitted from one generation to another.

Becquerel, Henri: (1852-1908) French physicist known for his discovery in 1896 of Becquerel rays, the first indications of radio-activity; these rays were later named gamma rays. He shared Nobel Prize for Physics with the Curies in 1903.

Berzelius, J.J: (1779-1848) Swedish Chemist, known for introduction of chemical shorthand symbols and atomic weights.

Bessemer, Sir Henry: (1813-1898) English engineer. He invented the process for the manufacture of steel known after his name.

Bhabha, Dr H.J.: (1909-66) Indian scientist. He published important papers on Cosmic Rays and Quantum Theory. He was professor at the Indian Science Institute, Bangalore; Chairman, Atomic Energy Commission; Director, Tata Institute of Fundamental Research; President, Indian Science Congress in 1951 and presided at the Atoms forPeace Conference held at Geneva in 1956. He had many significant researches in structure of atom and contributed largely to the setting up of atomic reactors at Trombay (Mumbai).

Bhagvantam, Dr S.: is an eminent Indian scientist who has made a rich contribution to research in radio astronomy and cosmic rays. He has published more than 150 research papers and several books. He retired in October 1969 as the Scientific Adviser to the Ministry of Defence, and Director General of the Defence Research Development Organisation. He is an old-time associate of Sir C.V. Raman.

Bhaskaracharya: Born in A.D. 1114, he was almost the last great Hindu mathematician and astronomer until modern times. He wrote Sidhanta-Siromani in 1150  which consisted of two mathematical and two astronomical parts. Bhaskara anticipated the modern theory on the convention of signs (minus by minus makes plus, minus by plus makes minus). He also anticipated Kepler’s method for determining the surface and volume of sphere.

Bhatnagar, Dr Shanti Swarup: (1895-1955) great Indian scientist. He was Director of Council of Scientific and Industrial Research (C.S.I.R.). A chain of National Laboratories has been established in the country due to his able organisation and unbounded energy.

Bohr, Neils: (born 1885) Danish Physicist. He was awarded Nobel Prize for Physics in 1922. He greatly extended the theory of atomic structure of devising an atomic model in 1913 and evolving theory of nuclear structure; assisted America in atom bomb research.

Borlaug, Norman Ernest: American agricultural scientist and winner of the Nobel Prize for Peace in 1970. He was one of those who laid the groundwork of the Green Revolution.

Bose, Sir J.C.: (1858-1937) Eminent Indian physicist and Botanist; founder of Bose Research Institute, Calcutta. Inventor of crescograph which is used to magnify movements made by plants.
Bose, S.N.: Eminent Indian scientist who won fame by expounding the Bose-Einstein theory, which is concerned in detection of a group of nuclear particles—named after him ‘Boson’ in recognition of his contribution to the subject; contributed to Plank’s law. Professor of physics, Calcutta University; nominated member to the Council of States. Awarded Padma Vibhushan in 1954. He died on February 4, 1974.

Boyle, Robert: (1627-1691) Irish natural philosopher; one of the founders of modern chemistry and Boyle’s law: “Temperature remaining constant, volume of a given mass of gas varies inversely as its pressure.”

Bragg, Sir William: (1862-1942) British physicist known for researches on the behaviour of crystals with regard to X-rays incident upon them. Author of the book: “Atomic Structure of Minerals”.

Cavendish, Henry: (1731-1810) English physicist and chemist; he discovered properties of hydrogen in 1766 and identified it as an element.

Chadwick, Sir James: (1891-1974) British physicist. He discovered the particle in an atomic nucleus which became known as the neutron, because it has no electric charge.

Chandrasekhar, Dr Subramanian: He was a scientist of Indian origin settled in the U.S.A., who shared the 1983  Nobel Prize for physics with an American, William Fowler. He was one of the most outstanding astrophysicist of the world.
His theory of stellar evolution—the birth and death of stars—is more than 30 years old. When he first propounded his finding that old stars just collapse and disappear in the light of denser stars of low light, the world’s top-flight astronomers laughed at him and rejected his theory. A disappointed Dr Chandrasekhar left Trinity, Cambridge, to pursue his research in the University of Chicago. Over the next two decades the “Chandrasekhar Limit” became an intrinsic part of text-books on advanced astrophysics. Global recognition and awards poured in, and the 1983 Nobel Prize tops a remarkable career spanning almost half a century.

Charak: (c.A.D. 80-180) was a court physician to Kushan king Kanishka. His writings are invaluable in the study of Hindu medicine.

Charles, Jacques Alexander Cesar: (1746-1823) a French scientist of great repute. He was the first to make a balloon ascension with hydrogen. He is known for his work on the effect of temperature on the volume of gases.

Clarke, Arthur C.: He is known for his suggestion of the concept of Geostationary Orbit.

Clark Maxwell, James: (1831-79) British physicist. His theoretical work prepared the way for wireless telegraphy and telephony. His principal works include: Perception of Colour, Colour Blindness, Theory of Heat, Electricity and Magnetism, Matter and Motion.

Claude, Albert: is a biologist of Luxembourg who shared the 1974 Nobel Prize in Medicine. His field of research relates to causes and treatment of cancer.

Columbus, Christopher: (1446-1506) A well-known Italian navigator set out on his first voyage in 1492; he discovered West Indies Islands, Cuba and Bahamas; he also discovered South America in 1498.

Cooper, Leon N.: Of the Brown University, Providence, Rhode Island (U.S.A.) was one of the three co-winners of the Nobel Prize in Physics, 1972 for researches into the theory of super-conductivity.

Copernicus: (1413-1543) A prominent astronomer of Poland who discovered the “Solar System”.

Cornforth, John Warcup: co-winner of the 1975 Nobel Prize in Chemistry is a deaf professor. He is an Australian living in England. His chief distinction is mapping out the formation of cholesterols which he calls “a great discovery” and contains the key to, for instance, sex hormones.

Curie, Madame Marie: (1867-1934) Polish physicist and chemist; famous for her discovery of radium was awarded Nobel Prize in chemistry in 1911 and shared Nobel Prize in physics in 1903 with her husband and Becquerel.

Dalton, John: (1766-1844) British scientist. He was founder of the Atomic Theory and law of Multiple Proportions.

Darwin, Charles: (1809-82) was the British scientist who discovered the principle of natural selection. His famous work is “The Origin of Species”.

Davy, Sir Humphrey: (1771-1829) British chemist. First to apply electric current for the isolation of metals. Studied anaesthetic action of nitrous oxide, properties of chlorine and alkali metals.

Debreu, Gerard: Gerard Debreu of the University of California at Berkeley, who has been awarded the 1983 Nobel memorial prize in economics is known for his research on market equilibrium in which he “incorporated new analytical methods into economic theory”.
Mr Debreu has expanded on a mathematical model designed by the two men in the early 1950s that confirmed the logic of Adam Smith’s “theory of general equilibrium” in which prices supply and demand tend to reach a balance within a free market economy.

Delbrueck, Dr Max: is a German-born American doctor working at the California Institute of Technology. He was one of the three American co-winners of the Nobel Prize for Medicine, 1969 for discoveries in molecular genetics.

De Vries: is known for Mutation theory.

Dhanvantri: a great physician during the reign of Chandragupta Vikramaditya (375-413 A.D.).

Dhawan, Prof Satish: He is former Chairman of the Indian Space Research Organisation (ISRO). Under his dynamic leadership India entered Space Age by launching “Aryabhata”, a scientific satellite, into space on April 19, 1975.

Edelman, Dr Gerald Maurice: of U.S.A. is co-winner of the Nobel Prize for Medicine, 1972. He is known for researches into the chemical structure of blood-proteins or antibodies which shield the human body against infection. He shared the prize with Dr Rodney Robert Porter of Oxford. The two Nobel-laureates were able to break the  giant molecules formed by antibodies into their component sections.

Edison, Thomas Alva: (1847-1931) American inventor of Dutch-Scottish parentage. He started life as a newsboy and then a telegraph operator. His inventions include: phonograph, the incandescent lamp, a new type of storage battery, an early form of cinematography etc.

Einstein, Prof Albert: (1879-1955) was German-Swiss world-famous scientist known for his theory of relativity. He was awarded Nobel Prize for his work on photoelectric effect.

Faraday, Michael: (1791-1867) An eminent English scientist; showed great prominence in the field of electromagnetism; discovered the laws of electrolysis and wrote a number of useful books on the subject.

Fleming, Alexander: (1881-1955) British bacteriologist. His notable discovery was lysozyme (1922), followed by penicillin (1929)—an antibiotic drug.

Fleming, Sir John Ambrose: (1849-1945) British physicist and engineer who was pioneer in the development of the telephone, electric light and radio.

Fraunhofer: German physicist. He gained prominence on the researches of ‘Light’ while performing spectrum-analysis of Sunlight; he discovered the spectrum to be crossed with some indifferent black lines. And the lines are so named as Fraunhofer Lines.

Freud, Sigmund: (1856-1939) originator of psycho-analysis, born of Jewish parents. Works: The Interpretation of Dreams; The Psychopathology of Every-day Life; The Ego and the Id; Civilization and Its Discontents.

Gabor, Dr Dennis: Who won the 1971 Nobel Prize award for Physics is a 71-year old British electrical engineer working as a scientist in the U.S.A. He was cited for his “invention in development of the holographic method”—three dimensional photography. Dr Gabor was the 16th Briton to have won the Nobel Prize in Physics. He was born and educated in Hungary. He later worked as research engineer in Germany and came to join the staff of the Imperial College in London in 1949. He invented holography in the late forties. But the science became fully developed with the coming of the laser in 1960. A holographic image is so lifelike that a viewer can see around things in a holograph by moving his head just as he looks around the real object.

Galileo: (1564-1642) Italian scientist. He was professor of mathematics. His view that all falling bodies, great or small, descend with equal velocity, made him unpopular with the orthodox scientists. He improved telescope and with it was the first man to see the satellites of Jupiter.

Gell-Mann, Prof Murray: was the recipient of the 1969 Nobel Prize for Physics. He is a teacher in the California Institute of Technology. Born in New York in 1929, Prof Gell-Mann has been the leading theorist in elementary particle research for the last 15 years. He was the 28th American to be awarded the Nobel Prize for Physics in which the U.S.A. now leads. The Nobel Prize was given to him for “his classification of elementary particles and their interactions”.

Goddard, Robert H.: was an American who mentioned the possibility of shooting a rocket to the moon in a paper entitled “A Method of Reaching Extreme Altitudes” published by him in 1919. By 1926 he had put some of his ideas into practice. He is looked upon as one of the pioneers of space research.

Graham, Thomas: (1805-1914) Scottish chemist called the “father of colloidal chemistry”. He did remarkable work on diffusion of substances in solution.

Heisenberg: is known for his theory of Uncertainty Principle.

Hahn, Otto: was a German pioneer of nuclear research. He won the Nobel Prize for Chemistry in 1944. It was Hahn who had proved in 1938 that atomic fission can be achieved by bombarding uranium with neutrons. The discovery revolutionised atomic science.

Hall, Charles Martin: (1863-1914) American chemist who discovered the modern method of extraction of aluminium by electrolysis of bauxite in 1886.

Harvey, William: (1578-1675) English physician who discovered the circulation of blood.

Herzberg, Dr Gehard: has been awarded the 1971 Nobel Prize in Chemistry, for his researches in atomic and molecular structures, particularly free radicals. He is the first Canadian to win a Nobel Prize in Chemistry.

Holley, Robert: Co-winner of the Nobel Prize for Medicine, 1968, belongs to Cornell. His researches into the genetic code and its function in building protein led to the discovery of the complete structure of a transfer RNA molecule and the way it works.

Hopkins, Sir Frederick Gowland: He was an eminent English biochemist famous for his important work on proteins and vitamins. He was awarded the Nobel Prize in medicine in 1929 for the discovery of Vitamin D.

Hoyle, Fred: is a British scientist and science-fiction writer who won the £ 1,000 Kalinga Prize in 1968.

Jenner, Edward: (1749-1823) Eminent English physician who discovered the vaccination system of alleviating small pox.

Josephson, Dr Brian: is a British scientist who co-shared the 1973 Nobel Prize for physics for “his theoretical predictions of the properties of a super-current through a tunnel barrier, in particular those phenomena which are generally known as Josephson effects”.

Joshi, Prof S.S.: He has done commendable work on physical and chemical reactions under electric discharge on active nitrogen; colloids; hydrogen peroxide; permanganates and  a phenomenon called “Joshi Effect”.

Joule, James Prescott: (1874-1937) a great English physicist who first demonstrated that mechanical energy can be converted into heat.

Kepler, Johannes: (1571-1630) German astronomer. He discovered 3 laws of planetary motion that bear his name viz., (1) The orbit of each planet is an ellipse with the sun at one of the foci; (2) the Radius vector of each planet describes equal areas in equal times; (3) The squares of the periods of the planets are proportional to the cubes of their mean distances from the sun.
Kepler had evolved a set of laws governing man in space with rare prescience. In a kind of allegory, he referred to the dangers of solar radiation, the need to overcome gravitational resistance, gravitational capture of spacecraft by the moon etc. What he wrote nearly 360 years ago was, however, little understood and his family was persecuted for it. His mother had to die in jail having been condemned as a witch.

Khorana Hargobind: who shared with two others the 1968 Nobel Prize for Medicine is an Indian by birth and an American by domicile. He deciphered the genetic code and later created an artificial gene.

Krishnan, Dr K.S.: (born 1898) collaborated with Sir C.V. Raman in the discovery of “Raman Effect”. President, Indian Science Congress, 1949; delegate to several international scientific conferences; Director, National Physical Laboratory, New Delhi.

Lavoisier, A.L.: (1743-1794) French chemist; established law of Indestructibility of Matter, Composition of Water and Air.

Lister, Joseph: (1827-1912) British surgeon. He was the first to use antiseptic treatment for wounds; introduced antiseptic surgery.

Lodge, Sir Oliver Joseph: (1851-1940) British physicist. He is chiefly known for his researches on radiation, and the relation between matter and ether.

Lovell, Sir Bernard: He is professor of Radio-Astronomy in the University of Manchester and is also Director of the Jodrell Bank Observatory. He remains very much in the news for tracking space-ships.

Lysenko: Author of Agro-biology, Lysenko gained fame as a Soviet geneticist. In 1948, he declared the Mendelian theory obsolete and erroneous.

Marconi: (1873-1937) Italian scientist; pioneer in wireless telegraphy and radio.

Max Planck: He was a German theoretical physicist who formulated the quantum theory which revolutionized physics. He was awarded the Nobel Prize in 1918.

Mendel, Johann Gregory: (1822-84) Austrian monk and naturalist whose discovery of certain principles of inheritance (heredity) is of deep significance in the study of biology.

Mendeleef, D.I.: (1834-1901) a Russian chemist, founder of periodic law and famous for the development of petroleum and other industries in Russia.

Meyer, Victor: (1848-1897) discovered a method to determine the molecular weights of volatile substances.

Morley, Edward William: (1818-1923) American chemist and physicist best known for his work in determining the composition of water by weight.

Moseley, Henry G.: (1887-1915) British physicist who did valuable work on atomic structure, and in 1913, devised the series of atomic numbers.

Nagarjuna: the renowned chemist of Buddhist era whose works are mostly preserved in  China and Tibet. A great Philosopher and Chemist. He makes a mention of crucibles, distillation stills, sublimation, colouring process, alloying of metals, extraction of copper and use of many metallic oxides in medicines. About chemistry he said, “As long as the science of chemistry prevails, let hunger, pain and poverty not torment men.”

Nag-Chowdhury, B.D.: an eminent Indian nuclear physicist, known all over the world.

Narlikar, J.V.: Indian scientist; co-author of Hoyle-Narlikar Theory of continuous creation. The theory of which he is co-author has been hailed as supplying some important missing links in Einstein’s theory of Relativity. The new theory of gravitation propounded by both the scientists, Narlikar and Hoyle, shows that gravitation is always attractive and there is no gravitational repulsions.

Newton, Sir Isaac: (1642-1727) was the British natural philosopher. He discovered binomial theorem; the differential and integral calculus. He expounded the universal law of gravitation. He is author of Principia Mathematica.

Nirenberg, Dr Marshall: is a U.S. molecular biologist who shared the 1968 Nobel Prize for Medicine with Dr Robert Holley and Dr Hargobind Khorana. Nirenberg is the author of a very simple but ingenious experiment which helped a great deal in clarifying the general character of the genetic code.

Oberth, Hermann: is a Rumanian-German Professor who is credited with establishing the experimental basis of modern rocketry. In 1923, the publication of his book, “The Rocket into Interplanetary Space” aroused great interest in space travel.

Ohm, George Simon: (1787-1854) physicist and mathematician; discovered the law known as Ohm’s Law.

Onsager, Lars: is a U.S. Professor who became a Nobel laureate in 1968 by winning the prize for Chemistry “for the discovery of the reciprocal relations bearing his name which are fundamental for the thermo-dynamics of irreversible processes”.

Paraceisus: (1493-1541) a Swiss mystic and chemist. He was the first to employ laudanum and antimony in Pharmacy.

Parson, Sir Charles: (1854-1931) British  engineer;  inventor of Parson steam turbine.

Pasteur, Louis: (1822-95) He was a French chemist who discovered the causes of fermentation in alcohol and milk and founded the Pasteur Institute in 1888. He made researches in silkworm disease, anthrax, and hydrophobia.

Pauling, Linus: American bio-chemist. He applied the quantum theory to chemistry and was awarded Nobel Prize (1954) for his contribution to the electrochemical theory of valency.

Porter, Dr Rodney Robert: is Professor of Biochemistry in Oxford University. Dr Porter is known for his discoveries relating to the chemical structure of antibodies.

Priestley, Joseph: (1733-1804) British Chemist; discovered oxygen and methods of collecting gases.

Pythagoras: is known as the father of Geometry.

Rainwater, James: of the U.S.A. who co-shared the 1975 Nobel Prize in Physics is known for the development of the theory that atomic nucleus is not always spherical but can also be egg-shaped which has no immediate practical meaning but is extremely essential to scientists.

Ramanna, Dr Raja: former Director of Bhabha Atomic Research Centre at Trombay. He was one of the Indian scientists associated with staging India’s first nuclear blast at Pokhran on May 18, 1974.

Raman, Sir C.V.: (1888-1970) Eminent Indian Scientist (F.R.S.) National Professor of Physics and founder Director of Raman Research Institute, Bangalore. He was awarded Nobel Prize for his discovery of ‘Raman Effect’ (Feb 28, 1928). His work on study of crystal structure is of unique importance. Feb 28 is celebrated every year as National Science Day.

Ramanujan, Srinivas: (1887-1920) Indian mathematician who contributed to the theory of numbers, theory of partitions, and the theory of continued fractions.

Ramsay, Sir William: (1852-1916) English chemist who discovered helium and later on neon, argon in collaboration with Rayleigh and others. He was awarded Nobel Prize in 1904.
Rao, Prof U. Ramachandra: is the Director of Indian Scientific Satellite Project (ISSP) at Peenya near Bangalore.

Ray, Sir P.C.: (1861-1944) founder of Indian Chemical Society and Bengal Chemical and Pharmaceutical Works Ltd., and author of ‘Hindu Chemistry’. His work about nitrous acid and its salts deserves special mention.

Richards, T.W.: He was Prof of Chemistry at Harvard University in U.S.A. He did notable  work in the accurate determination of atomic weights and was awarded Nobel Prize in 1916.

Roger Bacon: (1214-1294) He was inventor of Gun Powder and founder of experimental science; man of remarkable gifts and inventive power.

Rontgen, W. Konrad: (1845-1923) German physicist. He discovered X-rays, also called Rontgen rays. He was awarded the first Nobel Prize in 1901 for discovery of X-Rays.

Ross, Ronald: (1857-1932) leading British physician who discovered the cause of Malaria; awarded Nobel Prize for medicine in 1902.

Rutherford, Daniel: (1749-1819) a Scottish scientist who is given the credit for the discovery of nitrogen.

Rutherford, Lord: (1871-1937) won a Nobel Prize for his work on structure of atom and radio-activity.

Ryle, Sir Martin: of the U.K. who shared the 1974 Nobel Prize in Physics is known for the development of “aperture synthesis” technique designed to identify stellar objects through radio signals.

Saha, Dr Meghnad: (1893-1956) late Palit Prof of Physics, University College of Science and Technology, Calcutta University—well known for his researches in nuclear physics, cosmic rays, spectrum analysis and other branches of theoretical physics.

Sanger, Dr Frederik: British scientist awarded Nobel Prize in Chemistry in 1958 for his work in determining the composition of the insulin molecule. By his discovery he has put science a step forward towards knowing how disease attacks the human body. In 1980, he became only the fourth person ever to be awarded a second Nobel Prize.

Sarabhai, Dr Vikram A.: former Chairman of India’s Atomic Energy Commission and the Indian Space Research Organization (ISRO) died on December 30, 1971. Dr Sarabhai was an eminent physicist mainly interested in the astrophysical implications of Cosmic Ray Time Variations.

Sen, P.K. (Dr): is the Indian surgeon who performed Asia’s first heart transplant operation in Mumbai.

Simpson, Sir James Young: (1811-70) British physicist who was largely instrumental in the introduction of chloroform as an anaesthetic in 1847.

Soddy, Frederick: (1877-1956) British physical chemist. He was a pioneer of research into atomic disintegration. He coined the term “isotopes”;  did classic work on radioactivity.

Solvay, Earnest: (1838-1922) Belgian chemist known for devising a process known after his name for manufacture of sodium carbonate.

Susruta: was a fourth century Hindu surgeon and physician. He wrote an important  book on medicine and also a thesis on the medical properties of garlic.

Sutherland, Dr Earl W.: was the recipient of the Nobel Prize for Medicine, 1971.  He is credited with the discovery that the hormones in the human body produce another substance known as cyclic A.M.P., which activates them and controls the body’s cells. He has demonstrated that changes in the level of cyclic A.M.P. in the body can influence its disease-resisting capacity. This discovery opens up new vistas for the development of drugs that can treat diseases which have so far been regarded as incurable.

Teller, Edward (Dr): is a U.S. nuclear scientist who has played a major role in developing the hydrogen bomb. He is in fact known as the “father of the H-bomb”.

Thomson, Sir J.J.: (1856-1940) British physicist. He discovered the electron which inaugurated the electrical theory of the  atom. He is regarded as the founder of modern physics.

Tsiolkovsky: was a Russian teacher who in 1903 published a  treatise presenting remarkably accurate calculations on rocket dynamics and space-travel. He is looked upon as the earliest among the pioneers who laid the foundations of space exploration. The Russians call him the “Father of Rocketry”.

Varahmihira: (505-587) was a distinguished Indian astronomer, mathematician and philosopher. He was one of the nine gems of the court of king Vikramaditya.

Verne, Jules: (1828-1905) French science-fiction writer was author of “From the Earth to the Moon” published in 1865. The book carried a more or less accurate prediction of the launching and flight of Apollo-8.

Volta, A.: (1745-1827) Italian physicist and pioneer of electrical science; invented voltaic pile, the electrophorus and electroscope. The volt is named after him.

Voronoff, S.: Russian scientist best known for his method of preventing or delaying senility by grafting healthy animal glands, into the human body.

Watson and Crick: known for DNA double helix.

Watson-Watt, Sir Robert: British physicist. He developed radar.

Watt, James: (1736-1819) was Scottish engineer. He invented steam engine.

Yukawa, Dr H.: (born 1907) predicted a new particle meson which holds the protons and neutrons of the atomic nucleus. He is the first Japanese to win the Nobel Prize in Physics (1949).