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February 2015
Issue 115 February 2015 A NEWSLETTER OF THE ROCKEFELLER UNIVERSITY COMMUNITY 2015: Chinese New Year of the Sheep Q i o n g Wa n g If I have to name one day of an en- sight of a piece of bright red paper on the poems on a background of red paper. Ex- tire year that I wish dearly to be with my door. Suddenly, firecrackers began to ex- pressing sentiments about life’s renewal, family-on-the-other-side-of-the-planet, plode. Terrified, Nian ran away from the the arrival of spring, and wishes for a it’s the Chinese New Year. Also called village. prosperous year ahead, they’re pasted on Spring Festival, it is the most cherished When the villagers returned the fol- both sides of the main door. These Spring and celebrated holiday in China, as fami- lowing day, they were surprised to find Festival couplets originate from ancient lies reunite to ring out the old year and that everything was safe and sound. The “peach wood charms,” which are carved celebrate the coming new year. According old woman told the story of the beggar. or painted charms depicting protective to the Chinese Animal Zodiac, every year Noticing the red paper on the door and door gods. During the Five Dynasty Pe- is associated with one of twelve animals: the remnants of candles, lanterns, and riod (897-979 AD), Emperor Meng Chang Rat, Ox, Tiger, Rabbit, Dragon, Snake, firecrackers, the villagers suddenly real- ordered his counselor to engrave an in- Horse, Sheep, Monkey, Rooster, Dog, and ized that Nian feared the color red, bright spirational couplet on a pair of peach Pig. -
Oswald Avery and His Coworkers (Avery, Et Al
1984 marks the fortieth anniversary of the publica- tion of the classic work of Oswald Avery and his coworkers (Avery, et al. 1944) proving that DNA is the hereditary molecule. Few biological discoveries rival that of Avery's. He paved the way for the many molecular biologists who followed. Indeed, 1944 is often cited as the beginning of molecular Oswald Avery biology. Having been briefed on the experiments a year before their publication, Sir MacFarlane Burnet and DNA wrote home to his wife that Avery "has just made an extremely exciting discovery which, put rather crudely, is nothing less than the isolation of a pure Charles L. Vigue gene in the form of desoxyribonucleic acid" (Olby 1974). Recalling Avery's discovery, Ernst Mayr said "the impact of Avery's finding was electrifying. I Downloaded from http://online.ucpress.edu/abt/article-pdf/46/4/207/41261/4447817.pdf by guest on 23 September 2021 can confirm this on the basis of my own personal experience . My friends and I were all convinced that it was now conclusively demonstrated that DNA was the genetic material" (Mayr 1982). Scientific dogma is established in many ways. Dis- coveries such as that of the planet Uranus are quickly accepted because the evidence for them is so compel- ling. Some scientific pronouncements are immedi- ately accepted but later found to be erroneous. For example, it was widely accepted in the 1930s, 1940s, and early 1950s that humans had 48 chromosomes; in 1956 it was proven that we have only 46. Some find- ings are not accepted even though, in retrospect, the evidence was compelling. -
DNA: the Timeline and Evidence of Discovery
1/19/2017 DNA: The Timeline and Evidence of Discovery Interactive Click and Learn (Ann Brokaw Rocky River High School) Introduction For almost a century, many scientists paved the way to the ultimate discovery of DNA and its double helix structure. Without the work of these pioneering scientists, Watson and Crick may never have made their ground-breaking double helix model, published in 1953. The knowledge of how genetic material is stored and copied in this molecule gave rise to a new way of looking at and manipulating biological processes, called molecular biology. The breakthrough changed the face of biology and our lives forever. Watch The Double Helix short film (approximately 15 minutes) – hyperlinked here. 1 1/19/2017 1865 The Garden Pea 1865 The Garden Pea In 1865, Gregor Mendel established the foundation of genetics by unraveling the basic principles of heredity, though his work would not be recognized as “revolutionary” until after his death. By studying the common garden pea plant, Mendel demonstrated the inheritance of “discrete units” and introduced the idea that the inheritance of these units from generation to generation follows particular patterns. These patterns are now referred to as the “Laws of Mendelian Inheritance.” 2 1/19/2017 1869 The Isolation of “Nuclein” 1869 Isolated Nuclein Friedrich Miescher, a Swiss researcher, noticed an unknown precipitate in his work with white blood cells. Upon isolating the material, he noted that it resisted protein-digesting enzymes. Why is it important that the material was not digested by the enzymes? Further work led him to the discovery that the substance contained carbon, hydrogen, nitrogen and large amounts of phosphorus with no sulfur. -
Frederick Griffith and Transformation
Balderdash Example Griffith’s Transformation Experiment Ever since Edward Jenner invented the first vaccine in 1796 scientists have been working to vaccinate the world against all known diseases. Frederick Griffith wanted to save the world from pneumonia, a disease that was killing off much of Europe during the 1920’s. He didn’t build the pneumonia vaccine, but he did accidentally discover one of the most important concepts in bacterial survivability: Griffith discovered the principle of bacterial transformation. (In other words, why bacteria can fight off antibiotics) Griffith’s Transformation Experiment In 1928, Frederick Griffith was working with mice and two strains of Streptococcus pneumoniae One strain was “rough” in appearance and non-virulent, meaning that it wasn’t strong enough to hurt it’s host One strain was “smooth” in appearance and virulent. It was deadly to anyone who contracted the strain. The smooth strain looked smooth because it lacked a special protein coat that was rough in appearance and acted as a beacon summoning the mice’s immune systems. When injected with the rough (non-virulent) strain, mice lived When injected with the smooth (virulent) strain, mice died. Both as expected. Griffith’s Transformation Experiment Next, Griffith boiled the deadly, smooth strand of bacteria to kill it. He then injected mice with the deadly but boiled strand. Once again, as expected, the mice still lived. Finally, he injected the mice with BOILED smooth strands and LIVING rough strands The smooth strands are normally deadly, but Griffith had boiled them so they were not dangerous anymore. The rough strands were never deadly even when they were alive. -
Martha Chase Dies
PublisherInfo PublisherName : BioMed Central PublisherLocation : London PublisherImprintName : BioMed Central Martha Chase dies ArticleInfo ArticleID : 4830 ArticleDOI : 10.1186/gb-spotlight-20030820-01 ArticleCitationID : spotlight-20030820-01 ArticleSequenceNumber : 182 ArticleCategory : Research news ArticleFirstPage : 1 ArticleLastPage : 4 RegistrationDate : 2003–8–20 ArticleHistory : OnlineDate : 2003–8–20 ArticleCopyright : BioMed Central Ltd2003 ArticleGrants : ArticleContext : 130594411 Milly Dawson Email: [email protected] Martha Chase, renowned for her part in the pivotal "blender experiment," which firmly established DNA as the substance that transmits genetic information, died of pneumonia on August 8 in Lorain, Ohio. She was 75. In 1952, Chase participated in what came to be known as the Hershey-Chase experiment in her capacity as a laboratory assistant to Alfred D. Hershey. He won a Nobel Prize for his insights into the nature of viruses in 1969, along with Max Delbrück and Salvador Luria. Peter Sherwood, a spokesman for Cold Spring Harbor Laboratory, where the work took place, described the Hershey-Chase study as "one of the most simple and elegant experiments in the early days of the emerging field of molecular biology." "Her name would always be associated with that experiment, so she is some sort of monument," said her longtime friend Waclaw Szybalski, who met her when he joined Cold Spring Harbor Laboratory in 1951 and who is now a professor of oncology at the University of Wisconsin-Madison. Szybalski attended the first staff presentation of the Hershey-Chase experiment and was so impressed that he invited Chase for dinner and dancing the same evening. "I had an impression that she did not realize what an important piece of work that she did, but I think that I convinced her that evening," he said. -
René Dubos, Tuberculosis, and the “Ecological Facets of Virulence”
HPLS (2017) 39:15 DOI 10.1007/s40656-017-0142-5 ORIGINAL PAPER René Dubos, tuberculosis, and the “ecological facets of virulence” Mark Honigsbaum1 Received: 15 January 2017 / Accepted: 23 June 2017 / Published online: 4 July 2017 © The Author(s) 2017. This article is an open access publication Abstract Reflecting on his scientific career toward the end of his life, the French- educated medical researcher Rene´ Dubos presented his flowering as an ecological thinker as a story of linear progression—the inevitable product of the intellectual seeds planted in his youth. But how much store should we set by Dubos’s account of his ecological journey? Resisting retrospective biographical readings, this paper seeks to relate the development of Dubos’s ecological ideas to his experimental practices and his career as a laboratory researcher. In particular, I focus on Dubos’s studies of tuberculosis at the Rockefeller Institute in the period 1944–1956—studies which began with an inquiry into the tubercle bacillus and the physiochemical determinants of virulence, but which soon encompassed a wider investigation of the influence of environmental forces and host–parasite interactions on susceptibility and resistance to infection in animal models. At the same time, through a close reading of Dubos’s scientific papers and correspondence, I show how he both drew on and distinguished his ecological ideas from those of other medical researchers such as Theobald Smith, Frank Macfarlane Burnet, and Frank Fenner. However, whereas Burnet and Fenner tended to view ecological interactions at the level of populations, Dubos focused on the interface of hosts and parasites in the physio- logical environments of individuals. -
Winter for the Membership of the American Crystallographic Association, P.O
AMERICAN CRYSTALLOGRAPHIC ASSOCIATION NEWSLETTER Number 4 Winter 2004 ACA 2005 Transactions Symposium New Horizons in Structure Based Drug Discovery Table of Contents / President's Column Winter 2004 Table of Contents President's Column Presidentʼs Column ........................................................... 1-2 The fall ACA Council Guest Editoral: .................................................................2-3 meeting took place in early 2004 ACA Election Results ................................................ 4 November. At this time, News from Canada / Position Available .............................. 6 Council made a few deci- sions, based upon input ACA Committee Report / Web Watch ................................ 8 from the membership. First ACA 2004 Chicago .............................................9-29, 38-40 and foremost, many will Workshop Reports ...................................................... 9-12 be pleased to know that a Travel Award Winners / Commercial Exhibitors ...... 14-23 satisfactory venue for the McPherson Fankuchen Address ................................38-40 2006 summer meeting was News of Crystallographers ...........................................30-37 found. The meeting will be Awards: Janssen/Aminoff/Perutz ..............................30-33 held at the Sheraton Waikiki Obituaries: Blow/Alexander/McMurdie .................... 33-37 Hotel in Honolulu, July 22-27, 2005. Council is ACA Summer Schools / 2005 Etter Award ..................42-44 particularly appreciative of Database Update: -
Microbiology Immunology Cent
years This booklet was created by Ashley T. Haase, MD, Regents Professor and Head of the Department of Microbiology and Immunology, with invaluable input from current and former faculty, students, and staff. Acknowledgements to Colleen O’Neill, Department Administrator, for editorial and research assistance; the ASM Center for the History of Microbiology and Erik Moore, University Archivist, for historical documents and photos; and Ryan Kueser and the Medical School Office of Communications & Marketing, for design and production assistance. UMN Microbiology & Immunology 2019 Centennial Introduction CELEBRATING A CENTURY OF MICROBIOLOGY & IMMUNOLOGY This brief history captures the last half century from the last history and features foundational ideas and individuals who played prominent roles through their scientific contributions and leadership in microbiology and immunology at the University of Minnesota since the founding of the University in 1851. 1. UMN Microbiology & Immunology 2019 Centennial Microbiology at Minnesota MICROBIOLOGY AT MINNESOTA Microbiology at Minnesota has been From the beginning, faculty have studied distinguished from the beginning by the bacteria, viruses, and fungi relevant to breadth of the microorganisms studied important infectious diseases, from and by the disciplines and sub-disciplines early studies of diphtheria and rabies, represented in the research and teaching of through poliomyelitis, streptococcal and the faculty. The Microbiology Department staphylococcal infection to the present itself, as an integral part of the Medical day, HIV/AIDS and co-morbidities, TB and School since the department’s inception cryptococcal infections, and influenza. in 1918-1919, has been distinguished Beyond medical microbiology, veterinary too by its breadth, serving historically microbiology, microbial physiology, as the organizational center for all industrial microbiology, environmental microbiological teaching and research microbiology and ecology, microbial for the whole University. -
Lesson Overview to Answer That Question, the First Thing You Need to 12.1 Identifying the Know Is What Genes Are Made Of
THINK ABOUT IT How do genes work? Lesson Overview To answer that question, the first thing you need to 12.1 Identifying the know is what genes are made of. Substance of Genes How would you go about figuring out what molecule or molecules go into making a gene? Griffith’s Experiments Bacterial Transformation Griffith isolated two different strains of the same bacterial The discovery of the chemical nature of the gene began in 1928 species. with British scientist Frederick Griffith, who was trying to figure Both strains grew very well in culture plates in Griffith’s lab, but out how certain types of bacteria produce pneumonia. only one of the strains caused pneumonia. The disease-causing bacteria (S strain) grew into smooth colonies on culture plates, whereas the harmless bacteria (R strain) produced colonies with rough edges. Griffith’s Experiments Griffith’s Experiments When Griffith injected mice with disease-causing bacteria, First, Griffith took a culture of the S strain, heated the cells the mice developed pneumonia and died. to kill them, and then injected the heat-killed bacteria into When he injected mice with harmless bacteria, the mice laboratory mice. stayed healthy. The mice survived, suggesting that the cause of pneumonia Perhaps the S-strain bacteria produced a toxin that made was not a toxin from these disease-causing bacteria. the mice sick? To find out, Griffith ran a series of experiments. Griffith’s Experiments Griffith’s Experiments In Griffith’s next experiment, he mixed the heat-killed, The lungs of these mice were filled with the disease-causing S-strain bacteria with live, harmless bacteria from the R bacteria. -
158273443.Pdf
Cover: A single cell from a mouse embryo, moving about on a glass slide. The cell was fixed and then stained with antibody to actomyosin, a contractile protein complexof muscle cells. The antibody was visualized by fluorescence, and its pattern revealed thatthe embryo cell contained actomyosin in sheaths, even though it was not a muscle cell. (Photo by B. Pollack, K. Weber, G. Felsten) ANNUAL REPORT 1974 COLD SPRING HARBOR LABORATORY COLD SPRING HARBOR, NEW YORK COLD SPRINGHARBOR LABORATORY Cold Spring Harbor, Long Island,New York OFFICERS OF THE CORPORATION Chairman: Robert H. P. Olney Secretary: Dr. Bayard Clarkson 1st Vice Chairman: Edward Pulling Treasurer: Angus P. McIntyre 2nd Vice Chairman: Arthur Trottenberg Assistant Secretary-Treasurer: William R. Udry Laboratory Director: Dr. James D. Watson Administrative Director: William R. Udry BOARD OF TRUSTEES INSTITUTIONAL TRUSTEES Albert Einstein College of Medicine New York University MedicalCenter Dr. Harry Eagle Dr. Milton R. J. Salton The City University of New York Princeton University Dr. Norman R. Eaton Dr. Bruce Alberts Columbia University The Rockefeller University Dr. James E. Darnell, Jr. Dr. Rollin Hotchkiss Duke UniversityMedical Center Sloan-Kettering Institute Dr. Robert E. Webster Dr. Bayard Clarkson Harvard MedicalSchool University of Chicago Dr. Charles A.Thomas, Jr. Dr. Robert Haselkorn Long IslandBiological Association University of Wisconsin Mr. Edward Pulling Dr. Julian Davies Massachusetts Wawepex Society Institute of Technology J. Knight Dr. HermanEisen Mr. Townsend INDIVIDUALTRUSTEES Dr. DavidP. Jacobus Colton P. Wagner Watson Mrs. GeorgeN. Lindsay Dr. James D. White Angus P.McIntyre Mrs. Alex M. A. Woodcock RobertH. P. Olney Mr. William WalterII. Page Honorary Trustees: Hollaender CharlesS. -
The Rockefeller University Story
CASPARY AUDITORIUM AND FOUNTAINS THE ROCKEFELLER UNIVERSITY STORY THE ROCKEFELLER UNIVERSITY STORY JOHN KOBLER THE ROCKEFELLER UNIVERSITY PRESS· 1970 COPYRIGHT© 1970 BY THE ROCKEFELLER UNIVERSITY PRESS LIBRARY OF CONGRESS CATALOGUE CARD NO. 76-123050 STANDARD BOOK NO. 8740-015-9 PRINTED IN THE UNITED STATES OF AMERICA INTRODUCTION The first fifty years of The Rockefeller Institute for Medical Research have been recorded in depth and with keen insight by the medical his torian, George W. Corner. His story ends in 1953-a major turning point. That year, the Institute, which from its inception had been deeply in volved in post-doctoral education and research, became a graduate uni versity, offering the degree of Doctor of Philosophy to a small number of exceptional pre-doctoral students. Since 1953, The Rockefeller University's research and education pro grams have widened. Its achievements would fill a volume at least equal in size to Dr. Corner's history. Pending such a sequel, John Kobler, a journalist and biographer, has written a brief account intended to acquaint the general public with the recent history of The Rockefeller University. Today, as in the beginning, it is an Institution committed to excellence in research, education, and service to human kind. FREDERICK SEITZ President of The Rockefeller University CONTENTS INTRODUCTION V . the experimental method can meet human needs 1 You, here, explore and dream 13 There's no use doing anything for anybody until they're healthy 2 5 ... to become scholarly scientists of distinction 39 ... greater involvement in the practical affairs of society 63 ACKNOWLEDGMENTS 71 INDEX 73 . -
Streptococci
STREPTOCOCCI Streptococci are Gram-positive, nonmotile, nonsporeforming, catalase-negative cocci that occur in pairs or chains. Older cultures may lose their Gram-positive character. Most streptococci are facultative anaerobes, and some are obligate (strict) anaerobes. Most require enriched media (blood agar). Streptococci are subdivided into groups by antibodies that recognize surface antigens (Fig. 11). These groups may include one or more species. Serologic grouping is based on antigenic differences in cell wall carbohydrates (groups A to V), in cell wall pili-associated protein, and in the polysaccharide capsule in group B streptococci. Rebecca Lancefield developed the serologic classification scheme in 1933. β-hemolytic strains possess group-specific cell wall antigens, most of which are carbohydrates. These antigens can be detected by immunologic assays and have been useful for the rapid identification of some important streptococcal pathogens. The most important groupable streptococci are A, B and D. Among the groupable streptococci, infectious disease (particularly pharyngitis) is caused by group A. Group A streptococci have a hyaluronic acid capsule. Streptococcus pneumoniae (a major cause of human pneumonia) and Streptococcus mutans and other so-called viridans streptococci (among the causes of dental caries) do not possess group antigen. Streptococcus pneumoniae has a polysaccharide capsule that acts as a virulence factor for the organism; more than 90 different serotypes are known, and these types differ in virulence. Fig. 1 Streptococci - clasiffication. Group A streptococci causes: Strep throat - a sore, red throat, sometimes with white spots on the tonsils Scarlet fever - an illness that follows strep throat. It causes a red rash on the body.