The Challenges of Sciences

Total Page:16

File Type:pdf, Size:1020Kb

The Challenges of Sciences S.V. THE PONTIFICAL 103 ACADEMY OF SCIENCES Scripta Varia The Challenges 103 of Sciences A Tribute to the The Challenges of Sciences: A Tribute to the Memory of Carlos Chagas ofCarlos totheMemory Tribute The ChallengesofSciences:A Memory of Carlos Chagas EM AD IA C S A C I A E I N C T I I F A I R T V N M O P VATICAN CITY Working Group 2002 23-24 February 2001 MMII THE CHALLENGES OF SCIENCES A TRIBUTE TO THE MEMORY OF CARLOS CHAGAS Address: THE PONTIFICAL ACADEMY OF SCIENCES CASINA PIO IV, 00120 VATICAN CITY PONTIFICIAE ACADEMIAE SCIENTIARUM SCRIPTA VARIA 103 THE CHALLENGES OF SCIENCES A TRIBUTE TO THE MEMORY OF CARLOS CHAGAS 23-24 February 2001 EM AD IA C S A C I A E I N C T I I F A I R T V N M O P EX AEDIBVS ACADEMICIS IN CIVITATE VATICANA MMII The opinions expressed with absolute freedom during the presentation of the papers of this meeting, although published by the Academy, represent only the points of view of the participants and not those of the Academy. ISBN 88 - 7761 - 081 - 6 © Copyright 2002 PONTIFICIA ACADEMIA SCIENTIARUM VATICAN CITY The Pontifical Academy of Sciences Casina Pio IV The Participants of the Symposium in Memory of Carlos Chagas 23-24 February 2001 CONTENTS Programme................................................................................. 9 List of Participants..................................................................... 12 General Introduction – M. Sánchez Sorondo ........................... 18 Speech of Greeting – M. Sela...................................................... 20 Introduction – A.M. Chagas....................................................... 21 A Tale: The Manuscript – C. Chagas .......................................... 22 A Tale: The Translation – C. Chagas ............................................. 26 SCIENTIFIC PAPERS The Main Lines of Multidisciplinary Research Implanted at the Institute of Biophysics by Carlos Chagas Filho D.F. de Almeida.......................................................................... 33 The Contribution of Cell Biology for a Better Understanding of Chagas’ Disease W. de Souza ................................................................................ 41 Sciences and Solidarity P. Germain .................................................................................. 56 L’homme de science et la société actuelle A. Blanc-Lapierre ....................................................................... 62 8 CONTENTS Biodiversity and the Human Prospect P.H. Raven .................................................................................. 71 Genetically Modified Organisms M.F. Singer ................................................................................. 78 Molecular Evolution: Comparison of Natural and Engineered Genetic Variations W. Arber ...................................................................................... 90 Constraints on the Origin and Evolution of Life C. de Duve .................................................................................. 102 Challenges and Achievements in Infectious and Autoimmune Diseases M. Sela ........................................................................................ 112 Carlos Chagas Filho: Scientist and Humanist R. Levi-Montalcini ..................................................................... 118 How to Find Better Drugs for the Treatment of AIDS P.A.J. Janssen.............................................................................. 125 The Challenges of Science M.F. Perutz ................................................................................. 127 Functional Aspects of Left-handed Nucleic Acids B.A. Brown II and A. Rich......................................................... 135 Society, Sciences, and the Future of our Species C. Pavan ...................................................................................... 159 TESTIMONIES C.E. di Rovasenda...................................................................... 167 R. Dardozzi................................................................................. 168 Tables .......................................................................................... I-VI THE PONTIFICAL ACADEMY OF SCIENCES Symposium on: THE CHALLENGES OF SCIENCES A TRIBUTE TO THE MEMORY OF CARLOS CHAGAS (23-24 February 2001) Programme Friday, 23 February 2001 Chairman: N. Cabibbo 9:00 – 9:15 Welcome (N. Cabibbo) 9:15 – 9:25 General Introduction (M. Sánchez Sorondo) 9:25 – 9:30 Greetings (M. Sela) 9:30 – 9:40 A Tale by Carlos Chagas Filho (A.M. Chagas) 9:40 – 10:10 The Main Lines of Multi-disciplinary Research Implanted by Carlos Chagas Filho at the Institute of Biophysics (D. de Almeida) 10:20 – 10:50 The Contribution of Cell Biology for a Better Understanding of Chagas’ Disease W. de Souza 10 PROGRAMME 11:00- 11:30 Coffee-Break Chairman: W. Arber 11:30- 12:00 Science and Solidarity (P. Germain) 12:10 – 12:40 L’homme de science et la société actuelle (A. Blanc-Lapierre) 12:50 – 14:30 Lunch Chairman: A. Rich 14:30 –15:10 The Meaning of Biological Diversity: What Should We Do? (P.H. Raven) 15:10 - 15:50 Genetic Modification of Plants (M.F. Singer) 15:50 – 16:30 Coffee-Break 16:30 – 17:10 Molecular Evolution: Comparison of Natural and Engineered Genetic Variations (W. Arber) Saturday, 24 February 2001 Chairperson: M.F. Singer 9:00 – 9:30 Chance and Necessity in the Origin and Evolution of Life (C. de Duve) 9:40 – 10:10 Challenges and Achievements in Infectious and Autoimmune Diseases (M. Sela) PROGRAMME 11 10:20 – 10:50 Chagas’ Leadership in Science and in the Problem of Values (R. Levi-Montalcini) 11:00 – 11:30 Photograph of Participants and Coffee-Break Chairman: C. Pavan 11:30 – 12:00 How to Find Better Drugs for the Treatment of AIDS (P.A.J. Janssen) 12:10 – 12:40 Protein Aggregates in the Brain: Cause of Neurodegeneration and Dementias (M.F. Perutz) 12:50 – 14:50 Lunch Chairman: P.H. Raven 15:00 – 15:30 A Role for Left-Handed Double Stranded Nucleic Acid Helices in a Right-Handed World (A. Rich) 15:40 – 16:10 Society, Genetics, and the Future of Our Species (C. Pavan) 16:20 – 16:50 Coffee-Break 16:50 – 17:30 General Discussion LIST OF PARTICIPANTS Prof. Nicola CABIBBO, President H.E. Mons. Marcelo SÁNCHEZ SORONDO, Chancellor The Pontifical Academy of Sciences Casina Pio IV V-00120 Vatican City Tel: +39 0669883451 – Fax: +39 0669885218 e-mail: [email protected] Prof. Werner ARBER (Pontifical Academician) University of Basel Biozentrum, Department of Microbiology Klingelbergstrasse 70 CH-4056 Basel (Switzerland) Tel: +41 61 2672130 – Fax: +41 61 2672118 e-mail: [email protected] Prof. Antonio M. BATTRO Academia Nacional de Education Pacheco de Melo 2084 Buenos Aires (Argentina) Tel: +54 11 48062818 e-mail: [email protected] LIST OF PARTICIPANTS 13 Prof. André Joseph BLANC-LAPIERRE (Pontifical Academician) Académie des Sciences 23, quai de Conti F-75270 Paris Cedex 06 (France) Tel: +33 01 44414367 – Fax: +33 01 44414363 Mailing address: Résidence Voltaire I 14, rue du Général de Gaulle F-92290 Châtenay-Malabry (France) Tel: +33 01 43501120 Prof. Daniel P. BOVET Università di Roma “Tor Vergata” Department of Computer Science Via di Tor Vergata, 110 I-00100 ROMA (Italy) Tel: +39 0672597389 – Fax: +39 0672597460 e-mail: [email protected] Dr. Anna Margarida CHAGAS BOVET Doctor in Psychology Member of the International Society for Adolescent Psychiatry Roma (Italy) Prof. Darcy F. DE ALMEIDA Universidade Federal Do Rio de Janeiro Centro de Ciencias da Saude, Bloco “G” Instituto de Biofisica Carlos Chagas Filho Ilha do Fundao, Cidade Universitaria 21949-900 Rio de Janeiro, RJ (Brazil) Tel/fax: +55 21 5520786 e-mail: [email protected] 14 LIST OF PARTICIPANTS Prof. Christian DE DUVE (Pontifical Academician) Chrisian de Duve Institute of Cellular Pathology 75.50 Avenue Hippocrate 75 B-1200 Bruxelles (Belgique) Tel: +32 2 7647550 – Fax: +32 2 7647573 e-mail: [email protected] The Rockefeller University 1230 York Avenue New York, NY 10021 (USA) Tel: +1 212 3278149 – Fax: +1 212 3277974 e-mail: [email protected] Prof. Wanderley DE SOUZA Universidade Federal Do Rio de Janeiro Centro de Ciencias da Saude Instituto de Biofisica Carlos Chagas Filho CCS, Bloco G – Cidade Universitaria 21949 Rio de Janeiro, RJ (Brazil) Tel: +55 21 21 2602364 – Fax: +55 21 21 2808193 e-mail: [email protected] and: [email protected] Prof. Renata Gaddini DE BENEDETTI Università degli Studi di Roma “La Sapienza” Department of Paediatrics mailing address: Via dei Monti Parioli, 40 I-00197 Roma (Italy) Prof. Paulo GADELHA Museu Da Vida Fundacao Osvaldo Cruz Avenida Brasil 4365 21045 – 900 Rio de Janeiro, RJ (Brasil) Tel/Fax: +55 21 5905192 LIST OF PARTICIPANTS 15 Prof. Paul GERMAIN (Pontifical Academician) Académie des Sciences 23, quai de Conti F-75006 Paris (France) Tel: +33 1 44414352 – Fax: +33 1 44414363 Prof. Paul A.J. JANSSEN (Pontifical Academician) Janssen Research Foundation Turnhoutseweg 30 B-2340 Beerse (Belgium) Tel: +32 14 442280 – Fax: +32 14 437334 Prof. Vladimir I. KEILIS-BOROK (Pontifical Academician) International Institute of Earthquake Prediction Theory and Mathematical Geophysics Warshavskoye sh. 79, Kor 2 Moscow 113556 (Russia) Tel: +7 095 1107795 – fax: +7 095 3107032 e-mail: [email protected] Prof. Rita LEVI-MONTALCINI (Pontifical Academician) Institute of Neurobiology, CNR Viale Marx, 15 I-00137 Roma (Italy) Tel: +39 0686090510 – Fax: +39 0686090269 H.E. Marco César Meira NASLAUSKY, Ambassador Embassy of Brazil to the Holy See Via delle Botteghe Oscure,
Recommended publications
  • PERFORMED IDENTITIES: HEAVY METAL MUSICIANS BETWEEN 1984 and 1991 Bradley C. Klypchak a Dissertation Submitted to the Graduate
    PERFORMED IDENTITIES: HEAVY METAL MUSICIANS BETWEEN 1984 AND 1991 Bradley C. Klypchak A Dissertation Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY May 2007 Committee: Dr. Jeffrey A. Brown, Advisor Dr. John Makay Graduate Faculty Representative Dr. Ron E. Shields Dr. Don McQuarie © 2007 Bradley C. Klypchak All Rights Reserved iii ABSTRACT Dr. Jeffrey A. Brown, Advisor Between 1984 and 1991, heavy metal became one of the most publicly popular and commercially successful rock music subgenres. The focus of this dissertation is to explore the following research questions: How did the subculture of heavy metal music between 1984 and 1991 evolve and what meanings can be derived from this ongoing process? How did the contextual circumstances surrounding heavy metal music during this period impact the performative choices exhibited by artists, and from a position of retrospection, what lasting significance does this particular era of heavy metal merit today? A textual analysis of metal- related materials fostered the development of themes relating to the selective choices made and performances enacted by metal artists. These themes were then considered in terms of gender, sexuality, race, and age constructions as well as the ongoing negotiations of the metal artist within multiple performative realms. Occurring at the juncture of art and commerce, heavy metal music is a purposeful construction. Metal musicians made performative choices for serving particular aims, be it fame, wealth, or art. These same individuals worked within a greater system of influence. Metal bands were the contracted employees of record labels whose own corporate aims needed to be recognized.
    [Show full text]
  • Advertising (PDF)
    Neuroscience 2013 SEE YOU IN San Diego November 9 – 13, 2013 Join the Society for Neuroscience Are you an SfN member? Join now and save on annual meeting registration. You’ll also enjoy these member-only benefits: • Abstract submission — only SfN members can submit abstracts for the annual meeting • Lower registration rates and more housing choices for the annual meeting • The Journal of Neuroscience — access The Journal online and receive a discounted subscription on the print version • Free essential color charges for The Journal of Neuroscience manuscripts, when first and last authors are members • Free online access to the European Journal of Neuroscience • Premium services on NeuroJobs, SfN’s online career resource • Member newsletters, including Neuroscience Quarterly and Nexus If you are not a member or let your membership lapse, there’s never been a better time to join or renew. Visit www.sfn.org/joinnow and start receiving your member benefits today. www.sfn.org/joinnow membership_full_page_ad.indd 1 1/25/10 2:27:58 PM The #1 Cited Journal in Neuroscience* Read The Journal of Neuroscience every week to keep up on what’s happening in the field. s4HENUMBERONECITEDJOURNAL INNEUROSCIENCE s4HEMOSTNEUROSCIENCEARTICLES PUBLISHEDEACHYEARNEARLY in 2011 s )MPACTFACTOR s 0UBLISHEDTIMESAYEAR ,EARNMOREABOUTMEMBERAND INSTITUTIONALSUBSCRIPTIONSAT *.EUROSCIORGSUBSCRIPTIONS *ISI Journal Citation Reports, 2011 The Journal of Neuroscience 4HE/FlCIAL*OURNALOFTHE3OCIETYFOR.EUROSCIENCE THE HISTORY OF NEUROSCIENCE IN AUTOBIOGRAPHY THE LIVES AND DISCOVERIES OF EMINENT SENIOR NEUROSCIENTISTS CAPTURED IN AUTOBIOGRAPHICAL BOOKS AND VIDEOS The History of Neuroscience in Autobiography Series Edited by Larry R. Squire Outstanding neuroscientists tell the stories of their scientific work in this fascinating series of autobiographical essays.
    [Show full text]
  • Download the Abstract Book
    1 Exploring the male-induced female reproduction of Schistosoma mansoni in a novel medium Jipeng Wang1, Rui Chen1, James Collins1 1) UT Southwestern Medical Center. Schistosomiasis is a neglected tropical disease caused by schistosome parasites that infect over 200 million people. The prodigious egg output of these parasites is the sole driver of pathology due to infection. Female schistosomes rely on continuous pairing with male worms to fuel the maturation of their reproductive organs, yet our understanding of their sexual reproduction is limited because egg production is not sustained for more than a few days in vitro. Here, we explore the process of male-stimulated female maturation in our newly developed ABC169 medium and demonstrate that physical contact with a male worm, and not insemination, is sufficient to induce female development and the production of viable parthenogenetic haploid embryos. By performing an RNAi screen for genes whose expression was enriched in the female reproductive organs, we identify a single nuclear hormone receptor that is required for differentiation and maturation of germ line stem cells in female gonad. Furthermore, we screen genes in non-reproductive tissues that maybe involved in mediating cell signaling during the male-female interplay and identify a transcription factor gli1 whose knockdown prevents male worms from inducing the female sexual maturation while having no effect on male:female pairing. Using RNA-seq, we characterize the gene expression changes of male worms after gli1 knockdown as well as the female transcriptomic changes after pairing with gli1-knockdown males. We are currently exploring the downstream genes of this transcription factor that may mediate the male stimulus associated with pairing.
    [Show full text]
  • Criticalreading #Wickedproblem
    #CRITICALREADING #WICKEDPROBLEM We have a “wicked problem” . and that is a fantastic, engaging, exciting place to start. Carolyn V. Williams1 I. INTRODUCTION I became interested in the idea of critical reading—“learning to evaluate, draw inferences, and arrive at conclusions based on evidence” in the text2—when I assumed that my students would show up to law school with this skill . and then, through little fault of their own, they did not. I have not been the only legal scholar noticing this fact. During the 1980s and 90s a few legal scholars conducted research and wrote about law students’ reading skills.3 During the 2000s, a few more scholars wrote about how professors can help develop critical reading skills in law students.4 But it has not been until the past few years or so that legal scholars have begun to shine a light on just how deep the problem of law students’ critical reading skills 1 Professor Williams is an Associate Professor of Legal Writing & Assistant Clinical Professor of Law at the University of Arizona, James E. Rogers College of Law. Thank you to Dean Marc Miller for supporting this Article with a summer research grant. Many thanks to the Legal Writing Institute for hosting the 2018 We Write Retreat and the 2018 Writers’ Workshop and to the participants at each for their comments and support of this project. A heartfelt thank you to Mary Beth Beazley, Kenneth Dean Chestek, and Melissa Henke for graciously providing comments on prior drafts of this Article. Thank you to my oldest Generation Z child for demonstrating independence and the desire to fix broken systems so that I know my solution is possible.
    [Show full text]
  • Autophagy in Trypanosomatids
    Cells 2012, 1, 346-371; doi:10.3390/cells1030346 OPEN ACCESS cells ISSN 2073-4409 www.mdpi.com/journal/cells Review Autophagy in Trypanosomatids Ana Brennand 1,†, Eva Rico 2,†,‡ and Paul A. M. Michels 1,* 1 Research Unit for Tropical Diseases, de Duve Institute, Université catholique de Louvain, Avenue Hippocrate 74, postal box B1.74.01, B-1200 Brussels, Belgium; E-Mail: [email protected] 2 Department of Biochemistry and Molecular Biology, University Campus, University of Alcalá, Alcalá de Henares, Madrid, 28871, Spain; E-Mail: [email protected] † These authors contributed equally to this work. ‡ Present Address: Centre for Immunity, Infection and Evolution, Institute of Immunology and Infection Research, School of Biological Sciences, King’s Buildings, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, UK. * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +32-2-7647473; Fax: +32-2-7626853. Received: 28 June 2012; in revised form: 14 July 2012 / Accepted: 16 July 2012 / Published: 27 July 2012 Abstract: Autophagy is a ubiquitous eukaryotic process that also occurs in trypanosomatid parasites, protist organisms belonging to the supergroup Excavata, distinct from the supergroup Opistokontha that includes mammals and fungi. Half of the known yeast and mammalian AuTophaGy (ATG) proteins were detected in trypanosomatids, although with low sequence conservation. Trypanosomatids such as Trypanosoma brucei, Trypanosoma cruzi and Leishmania spp. are responsible for serious tropical diseases in humans. The parasites are transmitted by insects and, consequently, have a complicated life cycle during which they undergo dramatic morphological and metabolic transformations to adapt to the different environments.
    [Show full text]
  • Favorite Movies
    Favorites as of June 2011 Favorite Movies - 00s The Boondock Saints Kiss Kiss, Bang Bang Lord of War The Machinist The Prestige The Punisher Harold and Kumar Go to White Castle The Butterfly Effect Confessions of a Dangerous Mind The Ring We Were Soldiers Ghost World Snatch Memento Serendipity Shoot „Em Up Taken Rules of Attraction Resident Evil & (Apocalypse) American Psycho Favorite Movies - 90s Fight Club PI Election The Usual Suspects Reservoir Dogs The Player Gattaca True Romance Freeway Dogfight ----------------------------- Free Enterprise Groundhog Day Goodwill Hunting The Inner Circle Dark City From Dusk till Dawn Reality Bites Sixth Sense Chasing Amy Fear and Loathing in Las Vegas Avalon/Liberty Heights American Beauty Go Something About Mary Office Space Oleanna Forrest Gump Wild Things Pulp Fiction Scream 1 & 2 Lock, Stock, & Two Smoking Barrels Favorites as of June 2011 Favorite Movies - 80s The Sure Thing Valley Girl Real Genius Terminator Baby Its You Breakfast Club 48 Hours Amadeus A Fish Called Wanda Jacob's Ladder -------------------- Repo Man Into the Night Die Hard Insignificance Field of Dreams Sixteen Candles One Crazy Summer Better Off Dead Weird Science The Empire Strikes Back Aliens Raiders of the Lost Ark/Temple of Doom Robocop The Hitcher The Manhattan Project Heartbreak Ridge Peggy Sue Got Married Favorites as of June 2011 Favorite Movies - Previous Citizen Kane (1941) Casablanca (1943) Dead of Night (1945) Its a Wonderful Life (1946) Curse of the Demon (1957) Touch of Evil (1958) Psycho (1960) David and Lisa
    [Show full text]
  • The Cytological Events and Molecular Control of Life Cycle Development of Trypanosoma Brucei in the Mammalian Bloodstream
    pathogens Review The Cytological Events and Molecular Control of Life Cycle Development of Trypanosoma brucei in the Mammalian Bloodstream Eleanor Silvester †, Kirsty R. McWilliam † and Keith R. Matthews * Institute for Immunology and Infection Research, Centre for Immunity, Infection and Evolution, School of Biological Sciences, King’s Buildings, University of Edinburgh, Charlotte Auerbach Road, Edinburgh EH9 3FL, UK; [email protected] (E.S.); [email protected] (K.R.McW.) * Correspondence: [email protected]; Tel.: +44-131-651-3639 † These authors contributed equally to this work. Received: 23 May 2017; Accepted: 22 June 2017; Published: 28 June 2017 Abstract: African trypanosomes cause devastating disease in sub-Saharan Africa in humans and livestock. The parasite lives extracellularly within the bloodstream of mammalian hosts and is transmitted by blood-feeding tsetse flies. In the blood, trypanosomes exhibit two developmental forms: the slender form and the stumpy form. The slender form proliferates in the bloodstream, establishes the parasite numbers and avoids host immunity through antigenic variation. The stumpy form, in contrast, is non-proliferative and is adapted for transmission. Here, we overview the features of slender and stumpy form parasites in terms of their cytological and molecular characteristics and discuss how these contribute to their distinct biological functions. Thereafter, we describe the technical developments that have enabled recent discoveries that uncover how the slender to stumpy transition is enacted in molecular terms. Finally, we highlight new understanding of how control of the balance between slender and stumpy form parasites interfaces with other components of the infection dynamic of trypanosomes in their mammalian hosts.
    [Show full text]
  • Kmcb-Abstract-Book-2019-Final
    VIII April 27 – May 1, 2019 2 Eight Kinetoplastid Molecular Cell Biology Meeting April 27 – May 1, 2019 Hosted by the Marine Biological Laboratory Woods Hole, Massachusetts, USA The meeting was founded by George A.M. Cross in 2005 Organizers George A.M. Cross 2005-2011 Christian Tschudi 2013-2019 3 KMCBM 2019 Acknowledgements The organizer wishes to thank: The Program Committee Barbara Burleigh (Harvard T. H. Chan School of Public Health, Boston, USA) James D. Bangs (University at Buffalo, Buffalo, USA) Stephen M. Beverley (Washington University School of Medicine, St. Louis, USA) Keith R. Matthews (The University of Edinburgh, Edinburgh, Scotland, UK) The Staff at MBL: Paul Anderson and the MBL Housing and Conference Staff for registration and housing; All the IT AV Support staff and the staff in Sodexo Food Service at the MBL. Cover Design: Markus Engstler 4 KMCBM 2019 Program Saturday, April 27 02:00 – 05:00 Arrival, Registration and Poster Session A setup 04:00 – 06:30 Greeting and Dinner 07:00 – 09:00 Session I: VSG (chair: Mark Carrington) 09:00 – 11:00 Mixer Sunday, April 28 07:00 – 08:30 Breakfast 08:45 – 11:45 Session II: Biochemistry/Metabolism (chair: Ken Stuart) 12:00 – 01:30 Lunch 02:00 – 04:30 Session III: Cell Biology (chair: Kimberly Paul) 06:00 – 07:00 Dinner 07:00 – 09:00 POSTER PRESENTATIONS: Session A 09:00 – 11:00 Mixer & Poster A/B Changeover Monday, April 29 07:00 – 08:30 Breakfast 08:45 – 11:45 Session IV: Pathogenesis I (chair: Luisa Figueiredo) 12:00 – 01:30 Lunch 01:30 – 06:00 Free Time 06:00 – 07:00 Dinner 07:00
    [Show full text]
  • Hhmi Bulletin 3 4 Hhmi Club
    HHMI BULLETIN 4000 Jones Bridge Road • Chevy Chase, Maryland 20815-6789 Howard Hughes Medical Institute www.hhmi.org One Lump or Two? in this issue Once again, those fast-growing yeast find a way to turn a The Silicon Marvel long-held theory on its head. This time, it’s about prions, • Prions for Good which aren’t as universally nasty as once suspected. Some may actually help organisms evolve. The yeast colony shown here www.hhmi.org A Kaleidoscopic View contains a protein in its prion form. Because the prion, known as PSI+, is self-replicating and forms fibrous amyloids, the yeast look lumpy and bumpy—strikingly different from normally smooth yeast. Susan Lindquist’s group has found 19 yeast proteins that can switch back and forth between a normal and a prion version. The prions are thought to help the yeast adapt to changing conditions (see “A Silver Lining,” page 22). LIGHT MOVES v ol. 23 Heather True / Lindquist lab /no. 02 O b s e r v a t i O n s 16 Secret Agent MAn Skin cells do more than just cover our bodies. As a neurology resident, Stanley Prusiner saw Creutzfeldt–Jakob agent began to emerge. These data established, for the first time, that Keratinocytes, for example, anchor immune cells disease kill a patient in a matter of months. Researchers knew the rare a particular macromolecule was required for infectivity and that this within the epidermis, move and proliferate during neurodegenerative disease and scrapie, a similar disease in sheep, macromolecule was a protein …. wound healing, and even secrete inhibitory molecules were infectious but not as a result of a typical virus.
    [Show full text]
  • Showcase Presents: Batman: Volume 6 Free
    FREE SHOWCASE PRESENTS: BATMAN: VOLUME 6 PDF Neal Adams,Frank Robbins,Dennis O'Neil | 584 pages | 02 Feb 2016 | DC Comics | 9781401251536 | English | United States Showcase Presents: Batman Vol. 6 (Collected) | DC Database | Fandom Title and company credits page with partial image from cover of Batman DC, series and indicia information. Wraparound cover as two-page spread. Editing credit as per entry for Batman DC, series Showcase Presents: Batman 6. DCSeries. Volume 6 Price All credits as per table of contents unless otherwise noted. View: Large Edit cover. Asylum of the Futurians! The House That Showcase Presents: Batman: Volume 6 Batman! Take-Over of Paradise! Man in the Eternal Mask! A Vow from the Grave! Blind Rage of the Ten-Eyed Man! Into Showcase Presents: Batman: Volume 6 Den of the Death-Dealers! Darrk death ; League of Assassins introduction? Reprints from Batman DC, series June Legacy of Hate! Freak-Out at Phantom Hollow! Editing E. Legend of the Key Hook Lighthouse! Striss does not know the deadly secret of the chemical formula. Reprints from Batman DC, series September Man-Bat Madness! Wail of the Ghost-Bride! Night of the Reaper! And Be a Villain! Secret of the Slaying Statues! Silent Night, Deadly Night! Reprints from Batman DC, series February Forecast for Tonight Vengeance for a Dead Man! Moon; Alfred Pennyworth; Mr. Reprints from Batman DC, series March Blind Justice Blind Fear! Highway to Nowhere! Bruce Wayne -- Rest in Peace! The Stage Is Set The Lazarus Pit! Reprints from Batman DC, series August Killer's Roulette! The Demon Lives Again! View Change Showcase Presents: Batman: Volume 6.
    [Show full text]
  • Generation Times of E. Coli Prolong with Increasing Tannin Concentration While the Lag Phase Extends Exponentially
    plants Article Generation Times of E. coli Prolong with Increasing Tannin Concentration while the Lag Phase Extends Exponentially Sara Štumpf 1 , Gregor Hostnik 1, Mateja Primožiˇc 1, Maja Leitgeb 1,2 and Urban Bren 1,3,* 1 Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor 2000, Slovenia; [email protected] (S.Š.); [email protected] (G.H.); [email protected] (M.P.); [email protected] (M.L.) 2 Faculty of Medicine, University of Maribor, Maribor 2000, Slovenia 3 Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Koper 6000, Slovenia * Correspondence: [email protected]; Tel.: +386-2-2294-421 Received: 18 November 2020; Accepted: 29 November 2020; Published: 1 December 2020 Abstract: The current study examines the effect of tannins and tannin extracts on the lag phase duration, growth rate, and generation time of Escherichia coli.Effects of castalagin, vescalagin, gallic acid, Colistizer, tannic acid as well as chestnut, mimosa, and quebracho extracts were determined on E. coli’s growth phases using the broth microdilution method and obtained by turbidimetric measurements. E. coli responds to the stress caused by the investigated antimicrobial agents with reduced growth rates, longer generation times, and extended lag phases. Prolongation of the lag phase was relatively small at low tannin concentrations, while it became more pronounced at concentrations above half the MIC. Moreover, for the first time, it was observed that lag time extensions follow a strict exponential relationship with increasing tannin concentrations. This feature is very likely a direct consequence of the tannin complexation of certain essential ions from the growth medium, making them unavailable to E.
    [Show full text]
  • The Protozoan Nucleus. Molecular and Biochemical Parasitology, 209(1-2), Pp
    McCulloch, R., and Navarro, M. (2016) The protozoan nucleus. Molecular and Biochemical Parasitology, 209(1-2), pp. 76-87. (doi:10.1016/j.molbiopara.2016.05.002) This is the author’s final accepted version. There may be differences between this version and the published version. You are advised to consult the publisher’s version if you wish to cite from it. http://eprints.gla.ac.uk/135296/ Deposited on: 22 February 2017 Enlighten – Research publications by members of the University of Glasgow http://eprints.gla.ac.uk *Manuscript Click here to view linked References The protozoan nucleus Richard McCulloch1 and Miguel Navarro2 1. The Wellcome Trust Centre for Molecular Parasitology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Sir Graeme Davis Building, 120 University Place, Glasgow, G12 8TA, U.K. Telephone: 01413305946 Fax: 01413305422 Email: [email protected] 2. Instituto de Parasitología y Biomedicina López-Neyra, Consejo Superior de Investigaciones Científicas (CSIC), Avda. del Conocimiento s/n, 18100 Granada, Spain. Email: [email protected] Correspondence can be sent to either of above authors Keywords: nucleus; mitosis; nuclear envelope; chromosome; DNA replication; gene expression; nucleolus; expression site body 1 Abstract The nucleus is arguably the defining characteristic of eukaryotes, distinguishing their cell organisation from both bacteria and archaea. Though the evolutionary history of the nucleus remains the subject of debate, its emergence differs from several other eukaryotic organelles in that it appears not to have evolved through symbiosis, but by cell membrane elaboration from an archaeal ancestor. Evolution of the nucleus has been accompanied by elaboration of nuclear structures that are intimately linked with most aspects of nuclear genome function, including chromosome organisation, DNA maintenance, replication and segregation, and gene expression controls.
    [Show full text]