Celebrating 18 Years on the Web
TODAY IN SCIENCE HISTORY ®
Find science on or your birthday

Today in Science History - Quickie Quiz
Who said: “A people without children would face a hopeless future; a country without trees is almost as helpless.”
more quiz questions >>
Home > Category Index for Science Quotations > Category Index C > Category: Conversion

Conversion Quotes (14 quotes)

A man in twenty-four hours converts as much as seven ounces of carbon into carbonic acid; a milch cow will convert seventy ounces, and a horse seventy-nine ounces, solely by the act of respiration. That is, the horse in twenty-four hours burns seventy-nine ounces of charcoal, or carbon, in his organs of respiration to supply his natural warmth in that time ..., not in a free state, but in a state of combination.
In A Course of Six Lectures on the Chemical History of a Candle (1861), 117.
Science quotes on:  |  Burning (17)  |  Carbon (48)  |  Carbon Dioxide (20)  |  Charcoal (7)  |  Combination (69)  |  Cow (27)  |  Horse (40)  |  Hour (42)  |  Man (345)  |  Organ (60)  |  Ounce (5)  |  Respiration (12)  |  State (96)  |  Warmth (7)

An amino acid residue (other than glycine) has no symmetry elements. The general operation of conversion of one residue of a single chain into a second residue equivalent to the first is accordingly a rotation about an axis accompanied by translation along the axis. Hence the only configurations for a chain compatible with our postulate of equivalence of the residues are helical configurations.
[Co-author with American chemist, ert B. Corey (1897-1971) and H. R. Branson]
'The Structure of Proteins: Two Hydrogen-bonded Helical Configurations of the Polypeptide Chain', Proceedings of the National Academy of Sciences of the United States of America (1951), 37, 206.
Science quotes on:  |  Amino Acid (11)  |  Axis (8)  |  Chain (38)  |  Compatibility (4)  |  Configuration (4)  |  Equivalence (2)  |  Helix (8)  |  Operation (96)  |  Postulate (23)  |  Residue (6)  |  Rotation (6)  |  Symmetry (26)  |  Translation (12)

Engineering is the professional art of applying science to the optimum conversion of the resources of nature to the uses of humankind.
ASCE
In American Society of Civil Engineers, Engineering Issues (1964), 90-92, 49. Other sources attribute, without citation, to Ralph J. Smith (1962).
Science quotes on:  |  Applying (3)  |  Art (205)  |  Engineering (115)  |  Humankind (7)  |  Nature (1029)  |  Professional (27)  |  Resource (47)  |  Science (1699)  |  Use (70)

I propose to provide proof... that just as always an alcoholic ferment, the yeast of beer, is found where sugar is converted into alcohol and carbonic acid, so always a special ferment, a lactic yeast, is found where sugar is transformed into lactic acid. And, furthermore, when any plastic nitrogenated substance is able to transform sugar into that acid, the reason is that it is a suitable nutrient for the growth of the [lactic] ferment.
Comptes Rendus (1857), 45, 913.
Science quotes on:  |  Acid (18)  |  Alcohol (16)  |  Beer (6)  |  Carbonic Acid (4)  |  Ferment (4)  |  Growth (111)  |  Lactic Acid (2)  |  Nitrogen (18)  |  Nutrient (4)  |  Plastic (15)  |  Proof (192)  |  Proposition (47)  |  Providing (5)  |  Reason (330)  |  Substance (73)  |  Sugar (13)  |  Suitability (11)  |  Yeast (5)

If a little less time was devoted to the translation of letters by Julius Caesar describing Britain 2000 years ago and a little more time was spent on teaching children how to describe (in simple modern English) the method whereby ethylene was converted into polythene in 1933 in the ICI laboratories at Northwich, and to discussing the enormous social changes which have resulted from this discovery, then I believe that we should be training future leaders in this country to face the world of tomorrow far more effectively than we are at the present time.
Quoted in an Obituary, D. P. Craig, Biographical Memoirs of Fellows of the Royal Society (1972), 18, 461.
Science quotes on:  |  Britain (14)  |  Caesar_Julius (2)  |  Education (280)  |  Future (229)  |  History (302)  |  Laboratory (120)  |  Leader (19)  |  Obituary (10)  |  Politician (22)  |  Research (517)  |  Science And Society (21)  |  Tomorrow (29)  |  Training (39)

The artist does not illustrate science; [but] he frequently responds to the same interests that a scientist does, and expresses by a visual synthesis what the scientist converts into analytical formulae or experimental demonstrations.
'The Arts', in Charles Austin Beard, Whither Mankind: a Panorama of Modern Civilization (1928, 1971), 296.
Science quotes on:  |  Analysis (123)  |  Artist (46)  |  Demonstration (51)  |  Experiment (543)  |  Expression (82)  |  Formula (51)  |  Frequently (13)  |  Illustration (24)  |  Interest (170)  |  Response (24)  |  Scientist (447)  |  Synthesis (38)

The wintry clouds drop spangles on the mountains. If the thing occurred once in a century historians would chronicle and poets would sing of the event; but Nature, prodigal of beauty, rains down her hexagonal ice-stars year by year, forming layers yards in thickness. The summer sun thaws and partially consolidates the mass. Each winter's fall is covered by that of the ensuing one, and thus the snow layer of each year has to sustain an annually augmented weight. It is more and more compacted by the pressure, and ends by being converted into the ice of a true glacier, which stretches its frozen tongue far down beyond the limits of perpetual snow. The glaciers move, and through valleys they move like rivers.
The Glaciers of the Alps & Mountaineering in 1861 (1911), 247.
Science quotes on:  |  Annual (5)  |  Augmentation (4)  |  Beauty (171)  |  Beyond (65)  |  Century (94)  |  Chronicle (6)  |  Cloud (44)  |  Consolidation (3)  |  Cover (23)  |  Drop (27)  |  Event (97)  |  Fall (89)  |  Freezing (11)  |  Glacier (13)  |  Hexagon (4)  |  Historian (30)  |  Ice (29)  |  Layer (14)  |  Limit (86)  |  Mass (61)  |  Mountain (111)  |  Nature (1029)  |  Occurrence (30)  |  Perpetuity (7)  |  Poet (59)  |  Pressure (31)  |  Prodigal (2)  |  Rain (28)  |  Snow (15)  |  Song (18)  |  Spangle (2)  |  Star (251)  |  Stretch (8)  |  Summer (26)  |  Sun (211)  |  Sustain (13)  |  Thaw (2)  |  Thickness (4)  |  Tongue (16)  |  Truth (750)  |  Weight (61)  |  Winter (22)  |  Yard (4)  |  Year (214)

Through [the growing organism's] power of assimilation there is a constant encroachment of the organic upon the inorganic, a constant attempt to convert all available material into living substance, and to indefinitely multiply the total number of individual organisms.
In History of the Human Body (1919), 2.
Science quotes on:  |  Assimilation (9)  |  Encroachment (2)  |  Growth (111)  |  Indefinitely (9)  |  Individual (177)  |  Inorganic (11)  |  Life (917)  |  Multiplication (14)  |  Number (179)  |  Organic (48)  |  Substance (73)  |  Total (29)

Underneath his sweetness and gentleness was the heat of a volcano. [Michael Faraday] was a man of excitable and fiery nature; but through high self-discipline he had converted the fire into a central glow and motive power of life, instead of permitting it to waste itself in useless passion.
In Faraday as a Discoverer (1868), 37.
Science quotes on:  |  Biography (227)  |  Central (23)  |  Excitement (33)  |  Fire (117)  |  Glow (7)  |  Life (917)  |  Motive (26)  |  Nature (1029)  |  Passion (54)  |  Permit (20)  |  Power (273)  |  Self-Discipline (2)  |  Sweetness (8)  |  Uselessness (21)  |  Volcano (36)  |  Waste (57)

We need a new vision for agriculture to spread happiness among farm and rural families. Bio-happiness through the conversion of our bio-resources into wealth meaningful to our rural families should be the goal of our national policy for farmers.
In 'Science and Shaping the Future of Rice', collected in Pramod K. Aggarwal et al. (eds.), 206 International Rice Congress: Science, Technology, and Trade for Peace and Prosperity (2007), 8.
Science quotes on:  |  Agriculture (62)  |  Family (37)  |  Farm (17)  |  Farmer (23)  |  Goal (81)  |  Happiness (82)  |  Meaningful (14)  |  National (20)  |  Need (211)  |  New (340)  |  Policy (23)  |  Resource (47)  |  Rural (5)  |  Spread (19)  |  Vision (55)  |  Wealth (50)

Why can the chemist not take the requisite numbers of atoms and simply put them together? The answer is that the chemist never has atoms at his disposal, and if he had, the direct combination of the appropriate numbers of atoms would lead only to a Brobdingnagian potpourri of different kinds of molecules, having a vast array of different structures. What the chemist has at hand always consists of substances, themselves made up of molecules, containing defined numbers of atoms in ordered arrangements. Consequently, in order to synthesize anyone substance, his task is that of combining, modifying, transforming, and tailoring known substances, until the total effect of his manipulations is the conversion of one or more forms of matter into another.
In 'Art and Science in the Synthesis of Organic Compounds: Retrospect and Prospect', in Maeve O'Connor (ed.), Pointers and Pathways in Research (1963), 28.
Science quotes on:  |  Atom (251)  |  Brobdingnag (2)  |  Chemist (79)  |  Manipulation (9)  |  Matter (270)  |  Modification (31)  |  Molecule (125)  |  Structure (191)  |  Substance (73)  |  Synthesis (38)

[Helmholtz] is not a philosopher in the exclusive sense, as Kant, Hegel, Mansel are philosophers, but one who prosecutes physics and physiology, and acquires therein not only skill in developing any desideratum, but wisdom to know what are the desiderata, e.g., he was one of the first, and is one of the most active, preachers of the doctrine that since all kinds of energy are convertible, the first aim of science at this time. should be to ascertain in what way particular forms of energy can be converted into each other, and what are the equivalent quantities of the two forms of energy.
Letter to Lewis Campbell (21 Apr 1862). In P.M. Harman (ed.), The Scientific Letters and Papers of James Clerk Maxwell (1990), Vol. 1, 711.
Science quotes on:  |  Acquire (19)  |  Ascertain (7)  |  Conservation Of Energy (25)  |  Doctrine (53)  |  Equivalent (14)  |  Exclusive (9)  |  Form (210)  |  Hermann von Helmholtz (21)  |  Immanuel Kant (43)  |  Philosopher (132)  |  Physics (301)  |  Physiology (66)  |  Preacher (9)  |  Prosecute (3)  |  Quantity (35)  |  Sense (240)  |  Skill (50)  |  Wisdom (151)

[Modern science] passed through a long period of uncertainty and inconclusive experiment, but as the instrumental aids to research improved, and the results of observation accumulated, phantoms of the imagination were exorcised, idols of the cave were shattered, trustworthy materials were obtained for logical treatment, and hypotheses by long and careful trial were converted into theories.
In The Present Relations of Science and Religion (1913, 2004), 3
Science quotes on:  |  Accumulation (29)  |  Aid (23)  |  Careful (12)  |  Cave (12)  |  Experiment (543)  |  Hypothesis (227)  |  Idol (3)  |  Imagination (209)  |  Improvement (67)  |  Inconclusive (2)  |  Instrument (73)  |  Logic (187)  |  Long (95)  |  Material (124)  |  Observation (418)  |  Obtain (21)  |  Pass (60)  |  Period (49)  |  Phantom (5)  |  Result (250)  |  Shatter (5)  |  Theory (582)  |  Treatment (88)  |  Trial (23)  |  Trustworthy (6)  |  Uncertainty (37)

[The] weakness of biological balance studies has aptly been illustrated by comparison with the working of a slot machine. A penny brings forth one package of chewing gum; two pennies bring forth two. Interpreted according to the reasoning of balance physiology, the first observation is an indication of the conversion of copper into gum; the second constitutes proof.
[Co-author with David Rittenberg (1906-70).]
'The Application of Isotopes to the Study of Intermediary Metabolism', Science (1938), 87, 222.
Science quotes on:  |  Balance (43)  |  Biology (150)  |  Comparison (53)  |  Constitute (19)  |  Copper (18)  |  Illustration (24)  |  Indication (21)  |  Interpretation (61)  |  Observation (418)  |  Penny (3)  |  Physiology (66)  |  Proof (192)  |  Reasoning (79)  |  Study (331)  |  Weakness (31)  |  Work (457)


Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
Quotations by: Albert Einstein Isaac Newton Lord Kelvin Charles Darwin Srinivasa Ramanujan Carl Sagan Florence Nightingale Thomas Edison Aristotle Marie Curie Benjamin Franklin Winston Churchill Galileo Galilei Sigmund Freud Robert Bunsen Louis Pasteur Theodore Roosevelt Abraham Lincoln Ronald Reagan Leonardo DaVinci Michio Kaku Karl Popper Johann Goethe Robert Oppenheimer Charles Kettering  ... (more people)

Quotations about: Atomic  Bomb Biology Chemistry Deforestation Engineering Anatomy Astronomy Bacteria Biochemistry Botany Conservation Dinosaur Environment Fractal Genetics Geology History of Science Invention Jupiter Knowledge Love Mathematics Measurement Medicine Natural Resource Organic Chemistry Physics Physician Quantum Theory Research Science and Art Teacher Technology Universe Volcano Virus Wind Power Women Scientists X-Rays Youth Zoology  ... (more topics)
Sitewide search within all Today In Science History pages:
Visit our Science and Scientist Quotations index for more Science Quotes from archaeologists, biologists, chemists, geologists, inventors and inventions, mathematicians, physicists, pioneers in medicine, science events and technology.

Names index: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Categories index: | 1 | 2 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

- 100 -
Sophie Germain
Gertrude Elion
Ernest Rutherford
James Chadwick
Marcel Proust
William Harvey
Johann Goethe
John Keynes
Carl Gauss
Paul Feyerabend
- 90 -
Antoine Lavoisier
Lise Meitner
Charles Babbage
Ibn Khaldun
Euclid
Ralph Emerson
Robert Bunsen
Frederick Banting
Andre Ampere
Winston Churchill
- 80 -
John Locke
Bronislaw Malinowski
Bible
Thomas Huxley
Alessandro Volta
Erwin Schrodinger
Wilhelm Roentgen
Louis Pasteur
Bertrand Russell
Jean Lamarck
- 70 -
Samuel Morse
John Wheeler
Nicolaus Copernicus
Robert Fulton
Pierre Laplace
Humphry Davy
Thomas Edison
Lord Kelvin
Theodore Roosevelt
Carolus Linnaeus
- 60 -
Francis Galton
Linus Pauling
Immanuel Kant
Martin Fischer
Robert Boyle
Karl Popper
Paul Dirac
Avicenna
James Watson
William Shakespeare
- 50 -
Stephen Hawking
Niels Bohr
Nikola Tesla
Rachel Carson
Max Planck
Henry Adams
Richard Dawkins
Werner Heisenberg
Alfred Wegener
John Dalton
- 40 -
Pierre Fermat
Edward Wilson
Johannes Kepler
Gustave Eiffel
Giordano Bruno
JJ Thomson
Thomas Kuhn
Leonardo DaVinci
Archimedes
David Hume
- 30 -
Andreas Vesalius
Rudolf Virchow
Richard Feynman
James Hutton
Alexander Fleming
Emile Durkheim
Benjamin Franklin
Robert Oppenheimer
Robert Hooke
Charles Kettering
- 20 -
Carl Sagan
James Maxwell
Marie Curie
Rene Descartes
Francis Crick
Hippocrates
Michael Faraday
Srinivasa Ramanujan
Francis Bacon
Galileo Galilei
- 10 -
Aristotle
John Watson
Rosalind Franklin
Michio Kaku
Isaac Asimov
Charles Darwin
Sigmund Freud
Albert Einstein
Florence Nightingale
Isaac Newton



who invites your feedback
Thank you for sharing.
Today in Science History
Sign up for Newsletter
with quiz, quotes and more.