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         Wald George:     more books (35)
  1. A Generation in Search of a Future: a speech dilivered as part of the March 4th movement at the Massachusetts Institue of Technoloy by George Wald, 1969
  2. Report of the Committee on the Visual Arts at Harvard. By Francis Keppel, Wolfgang Stechow, Donald Oenslager, George Wald, Charles Sawyer, John Walker, S. Lane Faison, Jr., and John Nicholas Brown. by Cambridge. Harvard University. Committee on the Visual Arts., 1955
  3. Energy Bibliography Annotated by George Wald, 1978
  4. Self-Intellection and Identity in the Philosophy of Plotinus (European University Studies Series XX, Vol. 274/Europaische Hochschulschriften Reihe XX) by George Wald, 1990-11
  5. Defoliation: What Are Our Herbicides Doing To Us? (A Ballantine/Friends of the Earth book) by Thomas Whiteside, 1970-03
  6. Getting Started in Clinical Radiology: From Image to Diagnosis by George Eastman, Christoph Wald, et all 2005-10-10
  7. George Wald
  8. Biography - Wald, George (1906-1997): An article from: Contemporary Authors by Gale Reference Team, 2002-01-01
  9. Biochimiste: Dorothy Crowfoot Hodgkin, Robert Crane, Fernand Seguin, George Wald, Ernst Boris Chain, Juan Negrín, Paul Nurse, Eduard Buchner (French Edition)
  10. Biochimiste Américain: Robert Crane, George Wald, Roger Tsien, Robert Furchgott, Gertrude Elion, Gerty Theresa Cori, Edward Adelbert Doisy (French Edition)
  11. Neurobiologists: Roger Wolcott Sperry, Wade Regehr, Colin Blakemore, Achim Peters, Donald A. Glaser, George Wald, Edward Kravitz
  12. What is to Be Done?: Volume III, No. 10, December, 1978 -- Article on Allen Ginsberg with full text of his poem, "Plutonian Ode" SIGNED by Payne (ed.); (Allen Ginsberg) (George Wald) (Nuclear Disarmament) Templeton, 1978-01-01
  13. The Black Panthers, Jews and Israel by Albert S., Robert E. Goldburg, Huey Newton, Morris U. Schappes And George Wald Axelrad, 1971-01-01
  14. Societal Issues, Scientific Viewpoints

1. George Wald Winner Of The 1967 Nobel Prize In Medicine
george wald, a nobel Prize Laureate in Physiology and Medicine, at the nobelPrize Internet Archive. george wald. 1967 nobel Laureate in Medicine
http://almaz.com/nobel/medicine/1967c.html
G EORGE W ALD
1967 Nobel Laureate in Medicine
    for their discoveries concerning the primary physiological and chemical visual processes in the eye.
Background
    Born: 1906
    Residence: U.S.A.
    Affiliation: Harvard University, Cambridge, MA
Featured Internet Links Nobel News Links Links added by Nobel Internet Archive visitors Back to The Nobel Prize Internet Archive
Literature
Peace Chemistry ... Medicine We always welcome your feedback and comments

2. Index Of Nobel Laureates In Medicine
wald, george, 1967. Whipple, george Hoyt, 1934. Back to The nobel Prize InternetArchive Literature * Peace * Chemistry * Physics * Economics * Medicine
http://almaz.com/nobel/medicine/alpha.html
ALPHABETICAL LISTING OF NOBEL PRIZE LAUREATES IN PHYSIOLOGY AND MEDICINE
Name Year Awarded Adrian, Lord Edgar Douglas Arber, Werner Axelrod, Julius Baltimore, David ... Medicine We always welcome your feedback and comments

3. George Wald - Biography
george wald was born in New York City on November 18th Dr. wald is a member of theAmerican Society of From nobel Lectures, Physiology or Medicine 19631970.
http://www.nobel.se/medicine/laureates/1967/wald-bio.html
George Wald was born in New York City on November 18th, 1906, of immigrant parents, Isaac, who had come from a village near Przemysl, in what was then Austrian Poland, and Ernestine Rosenmann, from a small village near Munich, in Bavaria. After attending public primary and secondary I schools in Brooklyn, he received the degree of Bachelor of Science from Washington Square College of New York University in 1927; and then took graduate work in zoology at Columbia University , from which he received the Ph.D. in 1932. During this graduate period he was a student and research assistant of Professor Selig Hecht.
On receiving the Ph. D. he was awarded a National Research Council Fellowship in Biology (1932-1934). This was begun in the laboratory of Otto Warburg in Berlin-Dahlem and it was there that Dr.Wald first identified vitamin A in the retina. Vitamin A had just been isolated in the laboratory of Professor Paul Karrer in Zurich, and Dr. Wald went to Karrer's laboratory to complete the identification. That done, he spent a period in the laboratory of

4. Medicine 1967
The nobel Prize in Physiology or Medicine 1967. Ragnar Granit, Haldan KefferHartline, george wald. 1/3 of the prize, 1/3 of the prize, 1/3 of the prize.
http://www.nobel.se/medicine/laureates/1967/
The Nobel Prize in Physiology or Medicine 1967
"for their discoveries concerning the primary physiological and chemical visual processes in the eye" Ragnar Granit Haldan Keffer Hartline George Wald 1/3 of the prize 1/3 of the prize 1/3 of the prize Sweden USA USA Karolinska Institutet
Stockholm, Sweden Rockefeller University
New York, NY, USA Harvard University
Cambridge, MA, USA b. 1900
(in Helsinki, Finland)
d. 1991 b. 1903
d. 1983 b. 1906
d. 1997 The Nobel Prize in Physiology or Medicine 1967
Presentation Speech
Ragnar Granit
Biography
...
Banquet Speech
The 1967 Prize in: Physics Chemistry Physiology or Medicine Literature ... Peace Find a Laureate: Last modified June 16, 2000 The Official Web Site of The Nobel Foundation

5. George Wald, Nobel Winner, Dies At 90
george wald, nobel Winner, Dies at 90. george wald, Higgins Professor of BiologyEmeritus, died on April 12 of natural causes at his home in Cambridge.
http://www.news.harvard.edu/gazette/1997/04.17/GeorgeWaldNobel.html
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April 17, 1997
SEARCH THE GAZETTE
HARVARD GAZETTE ARCHIVES George Wald, Nobel Winner, Dies at 90 Emeritus Time listed him in a cover story as "one of the ten best teachers in the country." emerita , and three sons: Michael, of Elmira, N.Y., David, of Monument Beach, Mass., and Elijah, of Somerville, Mass. He is also survived by a daughter, Deborah, of San Francisco, nine grandchildren, and three great-grandchildren.

6. Faculty Of Arts And Sciences -- Memorial Minute
as a graduate student was a watershed year for george. wald very much wanted to layhis hands on the laboratory of eminent biochemist and nobel laureate Otto
http://www.news.harvard.edu/gazette/2000/05.11/mmwald.html
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May 11, 2000
SEARCH THE GAZETTE
HARVARD GAZETTE ARCHIVES Faculty of Arts and Sciences Memorial Minute George Wald
Read December 14, 1999 Biology lost one of its giants of the 20 th Arrowsmith and was smitten by the possibility of doing biological research. He applied to Columbia University for graduate studies in zoology and was accepted. Wanderjahre, Wald assumed his first academic position in 1934 as Tutor in Biochemical Sciences at Harvard. He remained at Harvard his entire academic career, becoming Instructor and Tutor in Biology in 1935, Faculty Instructor in 1939, Associate Professor in 1944, and Professor of Biology in 1948. His research at Harvard initially confirmed and then extended his postdoctoral research. These studies brought him to Woods Hole in the summers to work at the Marine Biological Laboratory (MBL). He returned to The MBL virtually every summer, teaching for many years in its famous Physiology Course and becoming, eventually, a Trustee of the Laboratory. The Nature of Living Things , which he taught until his retirement. He started the course with his marvelous "Origin of Life" lecture and the second semester with an "Origin of Death" lecture. Thousands of undergraduates were enthralled by his excursions into cosmology, atoms and molecules, and contemporary biology. A number of his students were persuaded to enter biology or medicine because of the fascination of

7. Wald, George
wald, george. Cambridge, Mass.), American biochemist who received (with Haldan K.Hartline of the United States and Ragnar Granit of Sweden) the nobel Prize for
http://www.britannica.com/nobel/micro/629_10.html

8. Nobel Prize Winners V-Z
Lucia, poet. wald, george, 1967, physiology/medicine, US, discoveries about chemicaland physiological visual processes in the eye, Walesa, Lech, 1983, peace, Poland,
http://www.britannica.com/nobel/win_v-z.html
Article Year Category Country* Achievement Literary Area Van Vleck, John H. physics U.S. contributions to understanding the behaviour of electrons in magnetic, noncrystalline solids Vane, John Robert physiology/medicine U.K. biochemistry and physiology of prostaglandins Varmus, Harold physiology/medicine U.S. study of cancer-causing genes called oncogenes Vickrey, William economics U.S. theory of incentives under conditions of asymmetric information Virtanen, Artturi Ilmari chemistry Finland invention of fodder preservation method Waals, Johannes Diederik van der physics The Netherlands research concerning the equation of state of gases and liquids Wagner-Jauregg, Julius physiology/medicine Austria work on malaria inoculation in dementia paralytica Waksman, Selman Abraham physiology/medicine U.S. discovery of streptomycin Walcott, Derek literature St. Lucia poet Wald, George physiology/medicine U.S. discoveries about chemical and physiological visual processes in the eye Walesa, Lech peace Poland Walker, John E.

9. WorldBook General Reference Encyclopedia > Life Science > Biology > Biographies
a picture of the window bleached on the back of the retina . Later, nobel Prizewinner george wald removed visual pigement from animal eyes and then ran
http://www.surfablebooks.com/worldbookgeneral/Life Science/Biology/Biographies/B

WorldBook General Reference Encyclopedia
Life Science Biology Biographies ... Wald, George Wald, George Search the Web with WorldBook All of Surfable Books Match: All Any Boolean
Documents 1 - 10 of 90 on the subject : Wald, George Add to my e-mail alerts WALD , George
WALD , George ... WALD , George , (1906-97), American biochemist and Nobel laureate, known ... visual pigments in the sensory cells in the retina of the Eye. Wald was also known ...
Found by: Google , Google2 , HotBot
http://www.fwkc.com/encyclopedia/low/articles/w/w028000041f.html

Wald , George
Wald , George ... Wald , George . ... National Research Council fellow (1932-33), Wald discovered that vitamin A is a ... of the pigments in the retina and, hence, important in maintaining ...
Found by: Google , Google2
http://www.elmhurst.edu:8081/nobel/micro/629_10.html

George Wald - encyclopedia article from Britannica.com
George Wald - b. Nov. 18, 1906, New York, N.Y., U.S. d. April 12, 1997, Cambridge, Mass. American biochemist who received (with Haldan K. Hartline of the United States and Ragnar Granit of Sweden) the Nobel Prize for Physiology or Medicine in 1967 f
Found by: HotBot
http://www.britannica.com/seo/g/george-wald/

10. Memory Of Prof. George Wald
Prof. george wald, nobel Laureate, Dies at 90. We should all pay tribute tothe memory of Prof. george wald, nobel Laureate, Dies at 90. By ERIC PACE.
http://www.geocities.com/Athens/1527/wald.html
Prof. George Wald, Nobel Laureate, Dies at 90
We should all pay tribute to the memory of Prof. George Wald, who was one of the very first scientists to speak out about the dangers of genetic engineering. He was also a great teacher. He passed away last Saturday. Below are two short quotations from him on the subject and his NY Times obituary: "Recombinant DNA technology [genetic engineering] faces our society with problems unprecedented not only the history of science, but of life on the Earth. It places in human hands the capacity to redesign living organisms, the products of some three billion years of evolution. "Such intervention must not be confused with previous intrusions upon the natural order of living organisms; animal and plant breeding, for example; or the artificial induction of mutations, as with X-rays. All such earlier procedures worked within single or closely related species. The nub of the new technology is to move genes back and forth, not only across species lines, but across any boundaries that now divide living organisms. The results will be essentially new organisms. Self-perpetuating and hence permanent. Once created, they cannot be recalled." "Up to now living organisms have evolved very slowly, and new forms have had plenty of time to settle in. Now whole proteins will be transposed overnight into wholly new associations, with consequences no one can foretell, either for the host organism or their neighbors.

11. Dr. Pék László: George Wald (1906-1997)
old. Korányi T. wald george. In A nobeldíjasok kislexikona. Gondolat, Budapest,1985. 809. old. Pirie A., von Heyningen, R Biochemistry of the Eye.
http://www.geocities.com/tapir32hu/wald.html
GEORGE WALD (1906-1997)* Dr. P©k L¡szl³ N©met kutat³k a mºlt sz¡zad hetvenes ©vei k¶r¼l fő vonalakban tiszt¡zt¡k a l¡t³szerv anat³miai k©pleteinek ©lettani szerep©t. A l¡t¡s bio - ©s neurok©miai folyamatinak megismer©se azonban e sz¡zad harmincas ©veitől az USA-ban tev©kenykedő kutat³k ©rdeme. Ezek k¶z© az eminens tud³sok k¶z© tartozott George Wald, akiről h³napokkal ezelőtt k¶z¶lt©k, hogy 91 ©ves kor¡ban elhunyt.
Wald 1906. november 18.-¡n sz¼letett New Yorkban. Sz¼lei egy Przemysl melletti falub³l v¡ndoroltak Amerik¡ba. Elemi ©s k¶z©piskol¡it Brooklynban v©gezte. A New York-i egyetem term©szettudom¡nyi fakult¡s¡ra iratkozott be, ©s 1927-ben szerzett diplom¡t. A Columbia Egyetem zool³gia tansz©k©n helyezkedett el. 1932-ben nyerte el a b¶lcs©szeti doktor¡tust. A National Research Council k©t©ves biol³giai ¶szt¶nd­jat szavazott meg sz¡m¡ra. Ebből egy ©vet a Nobel-d­jas Otto Warburg laborat³rium¡ban t¶lt¶tt Berlin-Dahlem ben. Itt mutatta ki Wald elsők©nt a retin¡ban az A-vitamint. Mivel ez idő t¡jt

12. Wald, George.  Papers Of George Wald, 1927-1996 : An Inventory
48 cubic feet in 145 boxes Abstract george David wald, 19061997, was a nobel Prize-winningbiologist, Higgins Professor of Biology at Harvard University, and
http://oasis.harvard.edu/html/hua02000.html
HUGFP 143
Wald, George. Papers of George Wald, 1927-1996 : an inventory
Harvard University Archives
Harvard University
Descriptive Summary
Repository: Harvard University Archives
Call No.: HUGFP 143
Creator: Wald, George.
Title: Papers of George Wald, 1927-1996
Quantity: ca. 48 cubic feet in 145 boxes
Abstract: George David Wald, 1906-1997, was a Nobel Prize-winning biologist, Higgins Professor of Biology at Harvard University, and a promoter of progressive political and social causes. These papers document both his life as a scientist and his life as a social activist.
Records History
Acquisition Information:
  • Accession number: 13671 1997 October 29

Processing Information : Processed by Marco Packard, Dana Lanier, Keith Anderson, Rachel D'Agostino, and Kate Bowers June 1998-June 2000 at the Harvard University Archives. Processing consisted of a collection survey and creation of a series and subseries hierarchy, folder lists, and this inventory. Physical processing consisted of transferring material into archivally appropriate containers, removing duplicate materials, and removing monographs not written by Wald.
Conditions on Use and Access Curatorial permission is required for viewing and photocopying material in the collection. Additional permissions are required for publication of quotations from the collection until December 3, 2047. Consult with the reference staff of the Harvard University Archives for details.

13. Wald, George (1906- )
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 wald, george (1906 ) Harvard biologist and nobel laureate who
http://www.angelfire.com/on2/daviddarling/Wald.htm
The Encyclopedia of Astrobiology, Astronomy, and Spaceflight about main latest news news archive ... Z
Wald, George (1906- )
Harvard biologist and Nobel laureate who, while allowing that life in the Universe was probably common, argued strongly against any attempt to establish contact with an extraterrestrial race. At a 1972 symposium on "Life Beyond Earth and the Mind of Man," sponsored jointly by NASA and Boston University, he said that he could "conceive of no nightmare as terrifying as establishing such communication with a so-called superior (or if you wish, advanced) technology in outer space." His fear was that human enterprise in arts, sciences, and other fields would come to an end once our race became "attached as by an umbilical cord to that 'thing out there.'" See extraterrestrial intelligence, implications following first contact
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14. Premios Nobel De Medicina
Premios nobel de Medicina. Año, Tema, Ganador. 1966, Huggins, Charles Brenton;Rous, Peyton. 1967, Granit, Ragnar; Hartline, Haldan Keffer; wald, george.
http://fai.unne.edu.ar/biologia/nobeles/nobelmed.htm
Premios Nobel de Medicina
Tema Ganador Behring, Emil Adolf Von Ross, Sir Ronald Finsen, Niels Ryberg Pavlov, Ivan Petrovich Koch, Robert Cajal, Santiago Ramon Y.; Golgi, Camillo Laveran, Charles Louis Alphonse Ehrlich, Paul; Metchnikoff, Ilya Ilyich Kocher, Emil Theodor Kossel, Albrecht Gullstrand, Allvar Carrel, Alexis Richet, Charles Robert Barany, Robert Bordet, Jules Krogh, Schack August Steenberger Hill, Sir Archibald Vivian; Meyerhof, Otto Fritz; Banting, Sir Frederick Grant; Macleod, John James Richard; Einthoven, Willem; Fibiger, Johannes Andreas Grib Wagner-Jauregg, Julius Nicolle, Charles Jules Henri Eijkman, Christiaan; Hopkins, Sir Frederick Gowland Landsteiner, Karl Warburg, Otto Heinrich Adrian, Lord Edgar Douglas; Sherrington, Sir Charles Scott Morgan, Thomas Hunt Minot, George Richards; Murphy, William Parry; Whipple, George Hoyt Spemann, Hans Dale, Sir Henry Hallett; Loewi, Otto Nagyrapolt, Albert Szent-Gyorgyi Von Heymans, Corneille Jean Francois Domagk, Gerhard Dam, Henrik Carl Peter; Doisy, Edward Adelbert Erlanger, Joseph; Gasser, Herbert Spencer

15. ALPHABETICAL LISTING OF NOBEL PRIZE LAUREATES IN PHYSIOLOGY AND MEDICINE
FRONTIERS IN BIOSCIENCE; ALPHABETICAL LISTING OF nobel PRIZE LAUREATESIN PHYSIOLOGY AND MEDICINE, Name, Year Awarded. wald, george, 1967.
http://www.bioscience.org/urllists/nobelm.htm
FRONTIERS IN BIOSCIENCE;
ALPHABETICAL LISTING OF NOBEL PRIZE LAUREATES IN PHYSIOLOGY AND MEDICINE
Name Year Awarded Adrian, Lord Edgar Douglas Arber, Werner Axelrod, Julius Baltimore, David ... Zinkernagel, Rolf M.

16. ALPHABETICAL LISTING OF NOBEL PRIZE LAUREATES IN CHEMISTRY
Zsigmondy, Richard Adolf, 1925. ALPHABETICAL LISTING OF nobel PRIZE LAUREATESIN PHYSIOLOGY AND MEDICINE. Waksman, Selman Abraham, 1952. wald, george, 1967.
http://www.bioscience.org/urllists/nobelc.htm
FRONTIERS IN BIOSCIENCE;
ALPHABETICAL LISTING OF NOBEL PRIZE LAUREATES IN
CHEMISTRY, PHYSIOLOGY AND MEDICINE

ALPHABETICAL LISTING OF NOBEL PRIZE LAUREATES IN CHEMISTRY Name Year Awarded Alder, Kurt Altman, Sidney Anfinsen, Christian B. Arrhenius, Svante August ... Zsigmondy, Richard Adolf ALPHABETICAL LISTING OF NOBEL PRIZE LAUREATES IN PHYSIOLOGY AND MEDICINE Name Year Awarded Adrian, Lord Edgar Douglas Arber, Werner Axelrod, Julius Baltimore, David ... Zinkernagel, Rolf M. Source: The Nobel Prize Internet Archive

17. Nobel Prize - Neuroscience
nobel Prize Neuroscience, Year Vision. wald, george, 11/18/1906to 04/12/1997, American, Mechanisms of Vision - chemical processes.
http://faculty.washington.edu/chudler/nobel.html
Nobel Prize - Neuroscience Year of Award Name(s) Birth and Death Dates Nationality/Citizenship Field of Study Golgi, Camillo 7/7/1843 to 1/21/1926 Italian Structure of the Nervous System Ramon y Cajal, Santiago 5/1/1852 to 10/18/1934 Spanish Structure of the Nervous System Gullstrand, Allvar 6/5/1862 to 7/28/1930 Swedish Optics of the Eye Barany, Robert 5/22/1876 to 4/8/1936 Austrian Physiology and pathology of the vestibular apparatus Wagner-Jauregg, Julius 3/7/1857 to 9/27/1940 Austrian Discovery of Malaria inoculation to treat dementia paralytica Adrian, Edgar Douglas 11/30/1889 to 8/4/1977 British Function of neurons in sending messages Sherrington, Charles Scott, Sir 11/27/1857 to 3/4/1952 British Function of neurons in the brain and spinal cord Dale, Henry Hallett, Sir 6/9/1875 to 7/23/1968 British Chemical transmission of nerve impulses Loewi, Otto 6/3/1875 to 12/25/1961 German, American Citizen Chemical transmission of nerve impulses Erlanger, Joseph 1/5/1874 to 12/15/1965 American Differentiated functions of single nerve fibers Gasser, Herbert Spencer

18. George Wald - Author Details And Biography - The Quotations Page
Quotations by Author. Author details george wald (1906 ). Full Name,wald, george. Biography, US biologist; nobel Prize in Medicine 1967.
http://www.quotationspage.com/author.php?author=George Wald

19. Nobel Prize In Medicine Since 1901
Rous, Peyton. 1967, Granit, Ragnar; Hartline, Haldan Keffer; wald, george.
http://www.planet101.com/nobel_medi_hist.htm
Nobel Prize in Medicine since 1901 Year Prize Winners Behring, Emil Adolf Von Ross, Sir Ronald Finsen, Niels Ryberg Pavlov, Ivan Petrovich Koch, Robert Cajal, Santiago Ramon Y.; Golgi, Camillo Laveran, Charles Louis Alphonse Ehrlich, Paul; Mechnikov, Ilya Ilyich Kocher, Emil Theodor Kossel, Albrecht Gullstrand, Allvar Carrel, Alexis Richet, Charles Robert Barany, Robert Bordet, Jules Krogh, Schack August Steenberger Hill, Sir Archibald Vivian; Meyerhof, Otto Fritz; Banting, Sir Frederick Grant; Macleod, John James Richard; Einthoven, Willem; Fibiger, Johannes Andreas Grib Wagner-Jauregg, Julius Nicolle, Charles Jules Henri Eijkman, Christiaan; Hopkins, Sir Frederick Gowland Landsteiner, Karl Warburg, Otto Heinrich Adrian, Lord Edgar Douglas; Sherrington, Sir Charles Scott Morgan, Thomas Hunt Minot, George Richards; Murphy, William Parry; Whipple, George Hoyt Spemann, Hans Dale, Sir Henry Hallett; Loewi, Otto Nagyrapolt, Albert Szent-Gyorgyi Von Heymans, Corneille Jean Francois Domagk, Gerhard Dam, Henrik Carl Peter; Doisy, Edward Adelbert Erlanger, Joseph; Gasser, Herbert Spencer

20. Wald, George
wald, george (1906 ). US biochemist who explored the chemistry of vision. nobel Prizefor Physiology or Medicine 1967. wald was born and educated in New York.
http://www.cartage.org.lb/en/themes/Biographies/MainBiographies/W/Wald/1.html
Wald, George US biochemist who explored the chemistry of vision. He discovered the role played in night vision by the retinal pigment rhodopsin, and later identified the three primary-colour pigments. Nobel Prize for Physiology or Medicine 1967.
Wald was born and educated in New York. He spent his academic career at Harvard from 1935, becoming professor of biology 1948. In the 1970s he spoke out against the US role in the Vietnam War.
Studying rhodopsin, which occurs in the rods (dim-light receptors) of the retina, Wald discovered in 1933 that this substance consists of the colourless protein opsin in combination with retinal, a yellow carotenoid compound that is the aldehyde of vitamin A. Rhodopsin molecules are split into these two compounds when they are struck by light, and the enzyme alcohol dehydrogenase then further reduces the retinal to form vitamin A. In the dark the process is reversed, but over a period of time some of the retinal is lost. This deficiency has to be made up from vitamin A, and if the body's stores are inadequate, night blindness results.
In the 1950s Wald found the retinal pigments that detect red and yellow-green light, and a few years later the pigment for blue light. All these are related to vitamin A, and in the 1960s he demonstrated that the absence of one or more of them results in colour blindness.

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