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  • 1
    Publication Date: 2019
    Description: 〈p〉The NIH Roadmap Epigenomics Program was launched to deliver reference epigenomic data from human tissues and cells, develop tools and methods for analyzing the epigenome, discover novel epigenetic marks, develop methods to manipulate the epigenome, and determine epigenetic contributions to diverse human diseases. Here, we comment on the outcomes from this program: the scientific contributions made possible by a consortium approach and the challenges, benefits, and lessons learned from this group science effort.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
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  • 2
    Publication Date: 2019
    Description: 〈p〉Outer hair cell (OHC) stereocilia bundle deflection opens mechanoelectrical transduction channels at the tips of the stereocilia from the middle and short rows, while bundle cohesion is maintained owing to the presence of horizontal top connectors. Here, we used a quantitative noncontact atomic force microscopy method to investigate stereocilia bundle stiffness and damping, when stimulated at acoustic frequencies and nanometer distances from the bundle. Stereocilia bundle mechanics were determined in stereocilin-deficient mice lacking top connectors and with detached tectorial membrane (〈i〉Strc〈/i〉〈sup〉–/–〈/sup〉/〈i〉Tecta〈/i〉〈sup〉–/–〈/sup〉 double knockout) and heterozygous littermate controls (〈i〉Strc〈/i〉〈sup〉+/–〈/sup〉/〈i〉Tecta〈/i〉〈sup〉–/–〈/sup〉). A substantial decrease in bundle stiffness and damping by ~60 and ~74% on postnatal days P13 to P15 was observed when top connectors were absent. Additionally, we followed bundle mechanics during OHC top connectors development between P9 and P15 and quantified the observed increase in OHC bundle stiffness and damping in 〈i〉Strc〈/i〉〈sup〉+/–〈/sup〉/〈i〉Tecta〈/i〉〈sup〉–/–〈/sup〉 mice while no significant change was detected in 〈i〉Strc〈/i〉〈sup〉–/–〈/sup〉/〈i〉Tecta〈/i〉〈sup〉–/–〈/sup〉 animals.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
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  • 3
    Publication Date: 1997-11-21
    Description: The hypothesis that quiescent CD4+ T lymphocytes carrying proviral DNA provide a reservoir for human immunodeficiency virus-type 1 (HIV-1) in patients on highly active antiretroviral therapy (HAART) was examined. In a study of 22 patients successfully treated with HAART for up to 30 months, replication-competent virus was routinely recovered from resting CD4+ T lymphocytes. The frequency of resting CD4+ T cells harboring latent HIV-1 was low, 0.2 to 16.4 per 10(6) cells, and, in cross-sectional analysis, did not decrease with increasing time on therapy. The recovered viruses generally did not show mutations associated with resistance to the relevant antiretroviral drugs. This reservoir of nonevolving latent virus in resting CD4+ T cells should be considered in deciding whether to terminate treatment in patients who respond to HAART.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finzi, D -- Hermankova, M -- Pierson, T -- Carruth, L M -- Buck, C -- Chaisson, R E -- Quinn, T C -- Chadwick, K -- Margolick, J -- Brookmeyer, R -- Gallant, J -- Markowitz, M -- Ho, D D -- Richman, D D -- Siliciano, R F -- AI23871/AI/NIAID NIH HHS/ -- AI27670/AI/NIAID NIH HHS/ -- AI28108/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1295-300.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9360927" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-HIV Agents/pharmacology/*therapeutic use ; CD4-Positive T-Lymphocytes/immunology/*virology ; Cell Separation ; Cross-Sectional Studies ; Drug Resistance, Microbial/genetics ; Drug Therapy, Combination ; HIV Infections/*drug therapy/*virology ; HIV-1/drug effects/genetics/isolation & purification/*physiology ; Humans ; Immunologic Memory ; Lymphocyte Activation ; Mutation ; Proviruses/physiology ; RNA, Viral/blood ; Time Factors ; Viral Load ; Viremia ; Virus Integration ; *Virus Latency ; *Virus Replication
    Print ISSN: 0036-8075
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  • 4
    Publication Date: 1992-02-07
    Description: Soils are differentiated vertically by coupled chemical, mechanical, and biological transport processes. Soil properties vary with depth, depending on the subsurface stresses, the extent of mixing, and the balance between mass removal in solution or suspension and mass accumulation near the surface. Channels left by decayed roots and burrowing animals allow organic and inorganic detritus and precipitates to move through the soil from above. Accumulation occurs at depths where small pores restrict further passage. Consecutive phases of translocation and root growth stir the soil; these processes constitute an invasive dilatational process that leads to positive cumulative strains. In contrast, below the depth of root penetration and mass additions, mineral dissolution by descending organic acids leads to internal collapse under overburden load. This softened and condensed precursor horizon is transformed into soil by biological activity, which stirs and expands the evolving residuum by invasion by roots and macropore networks that allows mixing of materials from above.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brimhall, G H -- Chadwick, O A -- Lewis, C J -- Compston, W -- Williams, I S -- Danti, K J -- Dietrich, W E -- Power, M E -- Hendricks, D -- Bratt, J -- New York, N.Y. -- Science. 1992 Feb 7;255(5045):695-702.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17756948" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
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  • 5
    Publication Date: 2009-09-26
    Description: Starburst galaxies exhibit in their central regions a highly increased rate of supernovae, the remnants of which are thought to accelerate energetic cosmic rays up to energies of approximately 10(15) electron volts. We report the detection of gamma rays--tracers of such cosmic rays--from the starburst galaxy NGC 253 using the High Energy Stereoscopic System (H.E.S.S.) array of imaging atmospheric Cherenkov telescopes. The gamma-ray flux above 220 billion electron volts is F = (5.5 +/- 1.0(stat) +/- 2.8(sys)) x 10(-13) cm(-2) s(-1), implying a cosmic-ray density about three orders of magnitude larger than that in the center of the Milky Way. The fraction of cosmic-ray energy channeled into gamma rays in this starburst environment is five times as large as that in our Galaxy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Acero, F -- Aharonian, F -- Akhperjanian, A G -- Anton, G -- Barres de Almeida, U -- Bazer-Bachi, A R -- Becherini, Y -- Behera, B -- Bernlohr, K -- Bochow, A -- Boisson, C -- Bolmont, J -- Borrel, V -- Brucker, J -- Brun, F -- Brun, P -- Buhler, R -- Bulik, T -- Busching, I -- Boutelier, T -- Chadwick, P M -- Charbonnier, A -- Chaves, R C G -- Cheesebrough, A -- Chounet, L-M -- Clapson, A C -- Coignet, G -- Dalton, M -- Daniel, M K -- Davids, I D -- Degrange, B -- Deil, C -- Dickinson, H J -- Djannati-Atai, A -- Domainko, W -- Drury, L O'C -- Dubois, F -- Dubus, G -- Dyks, J -- Dyrda, M -- Egberts, K -- Emmanoulopoulos, D -- Espigat, P -- Farnier, C -- Fegan, S -- Feinstein, F -- Fiasson, A -- Forster, A -- Fontaine, G -- Fussling, M -- Gabici, S -- Gallant, Y A -- Gerard, L -- Gerbig, D -- Giebels, B -- Glicenstein, J F -- Gluck, B -- Goret, P -- Goring, D -- Hauser, D -- Hauser, M -- Heinz, S -- Heinzelmann, G -- Henri, G -- Hermann, G -- Hinton, J A -- Hoffmann, A -- Hofmann, W -- Hofverberg, P -- Hoppe, S -- Horns, D -- Jacholkowska, A -- de Jager, O C -- Jahn, C -- Jung, I -- Katarzynski, K -- Katz, U -- Kaufmann, S -- Kerschhaggl, M -- Khangulyan, D -- Khelifi, B -- Keogh, D -- Klochkov, D -- Kluzniak, W -- Kneiske, T -- Komin, Nu -- Kosack, K -- Kossakowski, R -- Lamanna, G -- Lenain, J-P -- Lohse, T -- Marandon, V -- Martineau-Huynh, O -- Marcowith, A -- Masbou, J -- Maurin, D -- McComb, T J L -- Medina, M C -- Mehault, J -- Moderski, R -- Moulin, E -- Naumann-Godo, M -- de Naurois, M -- Nedbal, D -- Nekrassov, D -- Nicholas, B -- Niemiec, J -- Nolan, S J -- Ohm, S -- Olive, J-F -- de Ona Wilhelmi, E -- Orford, K J -- Ostrowski, M -- Panter, M -- Paz Arribas, M -- Pedaletti, G -- Pelletier, G -- Petrucci, P-O -- Pita, S -- Puhlhofer, G -- Punch, M -- Quirrenbach, A -- Raubenheimer, B C -- Raue, M -- Rayner, S M -- Reimer, O -- Renaud, M -- Rieger, F -- Ripken, J -- Rob, L -- Rosier-Lees, S -- Rowell, G -- Rudak, B -- Rulten, C B -- Ruppel, J -- Sahakian, V -- Santangelo, A -- Schlickeiser, R -- Schock, F M -- Schwanke, U -- Schwarzburg, S -- Schwemmer, S -- Shalchi, A -- Sikora, M -- Skilton, J L -- Sol, H -- Stawarz, L -- Steenkamp, R -- Stegmann, C -- Stinzing, F -- Superina, G -- Szostek, A -- Tam, P H -- Tavernet, J-P -- Terrier, R -- Tibolla, O -- Tluczykont, M -- van Eldik, C -- Vasileiadis, G -- Venter, C -- Venter, L -- Vialle, J P -- Vincent, P -- Vivier, M -- Volk, H J -- Volpe, F -- Wagner, S J -- Ward, M -- Zdziarski, A A -- Zech, A -- New York, N.Y. -- Science. 2009 Nov 20;326(5956):1080-2. doi: 10.1126/science.1178826. Epub 2009 Sep 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Physique Theorique et Astroparticules, Universite Montpellier 2, CNRS/IN2P3, CC 70, Place Eugene Bataillon, F-34095 Montpellier Cedex 5, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779150" target="_blank"〉PubMed〈/a〉
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  • 6
    Publication Date: 2009-07-04
    Description: The accretion of matter onto a massive black hole is believed to feed the relativistic plasma jets found in many active galactic nuclei (AGN). Although some AGN accelerate particles to energies exceeding 10(12) electron volts and are bright sources of very-high-energy (VHE) gamma-ray emission, it is not yet known where the VHE emission originates. Here we report on radio and VHE observations of the radio galaxy Messier 87, revealing a period of extremely strong VHE gamma-ray flares accompanied by a strong increase of the radio flux from its nucleus. These results imply that charged particles are accelerated to very high energies in the immediate vicinity of the black hole.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉VERITAS Collaboration -- VLBA 43 GHz M87 Monitoring Team -- H.E.S.S. Collaboration -- MAGIC Collaboration -- Acciari, V A -- Aliu, E -- Arlen, T -- Bautista, M -- Beilicke, M -- Benbow, W -- Bradbury, S M -- Buckley, J H -- Bugaev, V -- Butt, Y -- Byrum, K -- Cannon, A -- Celik, O -- Cesarini, A -- Chow, Y C -- Ciupik, L -- Cogan, P -- Cui, W -- Dickherber, R -- Fegan, S J -- Finley, J P -- Fortin, P -- Fortson, L -- Furniss, A -- Gall, D -- Gillanders, G H -- Grube, J -- Guenette, R -- Gyuk, G -- Hanna, D -- Holder, J -- Horan, D -- Hui, C M -- Humensky, T B -- Imran, A -- Kaaret, P -- Karlsson, N -- Kieda, D -- Kildea, J -- Konopelko, A -- Krawczynski, H -- Krennrich, F -- Lang, M J -- LeBohec, S -- Maier, G -- McCann, A -- McCutcheon, M -- Millis, J -- Moriarty, P -- Ong, R A -- Otte, A N -- Pandel, D -- Perkins, J S -- Petry, D -- Pohl, M -- Quinn, J -- Ragan, K -- Reyes, L C -- Reynolds, P T -- Roache, E -- Rose, H J -- Schroedter, M -- Sembroski, G H -- Smith, A W -- Swordy, S P -- Theiling, M -- Toner, J A -- Varlotta, A -- Vincent, S -- Wakely, S P -- Ward, J E -- Weekes, T C -- Weinstein, A -- Williams, D A -- Wissel, S -- Wood, M -- Walker, R C -- Davies, F -- Hardee, P E -- Junor, W -- Ly, C -- Aharonian, F -- Akhperjanian, A G -- Anton, G -- Barres de Almeida, U -- Bazer-Bachi, A R -- Becherini, Y -- Behera, B -- Bernlohr, K -- Bochow, A -- Boisson, C -- Bolmont, J -- Borrel, V -- Brucker, J -- Brun, F -- Brun, P -- Buhler, R -- Bulik, T -- Busching, I -- Boutelier, T -- Chadwick, P M -- Charbonnier, A -- Chaves, R C G -- Cheesebrough, A -- Chounet, L-M -- Clapson, A C -- Coignet, G -- Dalton, M -- Daniel, M K -- Davids, I D -- Degrange, B -- Deil, C -- Dickinson, H J -- Djannati-Atai, A -- Domainko, W -- Drury, L O'C -- Dubois, F -- Dubus, G -- Dyks, J -- Dyrda, M -- Egberts, K -- Emmanoulopoulos, D -- Espigat, P -- Farnier, C -- Feinstein, F -- Fiasson, A -- Forster, A -- Fontaine, G -- Fussling, M -- Gabici, S -- Gallant, Y A -- Gerard, L -- Gerbig, D -- Giebels, B -- Glicenstein, J F -- Gluck, B -- Goret, P -- Gohring, D -- Hauser, D -- Hauser, M -- Heinz, S -- Heinzelmann, G -- Henri, G -- Hermann, G -- Hinton, J A -- Hoffmann, A -- Hofmann, W -- Holleran, M -- Hoppe, S -- Horns, D -- Jacholkowska, A -- de Jager, O C -- Jahn, C -- Jung, I -- Katarzynski, K -- Katz, U -- Kaufmann, S -- Kendziorra, E -- Kerschhaggl, M -- Khangulyan, D -- Khelifi, B -- Keogh, D -- Kluzniak, W -- Kneiske, T -- Komin, Nu -- Kosack, K -- Lamanna, G -- Lenain, J-P -- Lohse, T -- Marandon, V -- Martin, J M -- Martineau-Huynh, O -- Marcowith, A -- Maurin, D -- McComb, T J L -- Medina, M C -- Moderski, R -- Moulin, E -- Naumann-Godo, M -- de Naurois, M -- Nedbal, D -- Nekrassov, D -- Nicholas, B -- Niemiec, J -- Nolan, S J -- Ohm, S -- Olive, J-F -- de Ona Wilhelmi, E -- Orford, K J -- Ostrowski, M -- Panter, M -- Paz Arribas, M -- Pedaletti, G -- Pelletier, G -- Petrucci, P-O -- Pita, S -- Puhlhofer, G -- Punch, M -- Quirrenbach, A -- Raubenheimer, B C -- Raue, M -- Rayner, S M -- Renaud, M -- Rieger, F -- Ripken, J -- Rob, L -- Rosier-Lees, S -- Rowell, G -- Rudak, B -- Rulten, C B -- Ruppel, J -- Sahakian, V -- Santangelo, A -- Schlickeiser, R -- Schock, F M -- Schroder, R -- Schwanke, U -- Schwarzburg, S -- Schwemmer, S -- Shalchi, A -- Sikora, M -- Skilton, J L -- Sol, H -- Spangler, D -- Stawarz, L -- Steenkamp, R -- Stegmann, C -- Stinzing, F -- Superina, G -- Szostek, A -- Tam, P H -- Tavernet, J-P -- Terrier, R -- Tibolla, O -- Tluczykont, M -- van Eldik, C -- Vasileiadis, G -- Venter, C -- Venter, L -- Vialle, J P -- Vincent, P -- Vivier, M -- Volk, H J -- Volpe, F -- Wagner, S J -- Ward, M -- Zdziarski, A A -- Zech, A -- Anderhub, H -- Antonelli, L A -- Antoranz, P -- Backes, M -- Baixeras, C -- Balestra, S -- Barrio, J A -- Bastieri, D -- Becerra Gonzalez, J -- Becker, J K -- Bednarek, W -- Berger, K -- Bernardini, E -- Biland, A -- Bock, R K -- Bonnoli, G -- Bordas, P -- Borla Tridon, D -- Bosch-Ramon, V -- Bose, D -- Braun, I -- Bretz, T -- Britvitch, I -- Camara, M -- Carmona, E -- Commichau, S -- Contreras, J L -- Cortina, J -- Costado, M T -- Covino, S -- Curtef, V -- Dazzi, F -- De Angelis, A -- De Cea del Pozo, E -- Delgado Mendez, C -- De los Reyes, R -- De Lotto, B -- De Maria, M -- De Sabata, F -- Dominguez, A -- Dorner, D -- Doro, M -- Elsaesser, D -- Errando, M -- Ferenc, D -- Fernandez, E -- Firpo, R -- Fonseca, M V -- Font, L -- Galante, N -- Garcia Lopez, R J -- Garczarczyk, M -- Gaug, M -- Goebel, F -- Hadasch, D -- Hayashida, M -- Herrero, A -- Hildebrand, D -- Hohne-Monch, D -- Hose, J -- Hsu, C C -- Jogler, T -- Kranich, D -- La Barbera, A -- Laille, A -- Leonardo, E -- Lindfors, E -- Lombardi, S -- Longo, F -- Lopez, M -- Lorenz, E -- Majumdar, P -- Maneva, G -- Mankuzhiyil, N -- Mannheim, K -- Maraschi, L -- Mariotti, M -- Martinez, M -- Mazin, D -- Meucci, M -- Miranda, J M -- Mirzoyan, R -- Miyamoto, H -- Moldon, J -- Moles, M -- Moralejo, A -- Nieto, D -- Nilsson, K -- Ninkovic, J -- Oya, I -- Paoletti, R -- Paredes, J M -- Pasanen, M -- Pascoli, D -- Pauss, F -- Pegna, R G -- Perez-Torres, M A -- Persic, M -- Peruzzo, L -- Prada, F -- Prandini, E -- Puchades, N -- Reichardt, I -- Rhode, W -- Ribo, M -- Rico, J -- Rissi, M -- Robert, A -- Rugamer, S -- Saggion, A -- Saito, T Y -- Salvati, M -- Sanchez-Conde, M -- Satalecka, K -- Scalzotto, V -- Scapin, V -- Schweizer, T -- Shayduk, M -- Shore, S N -- Sidro, N -- Sierpowska-Bartosik, A -- Sillanpaa, A -- Sitarek, J -- Sobczynska, D -- Spanier, F -- Stamerra, A -- Stark, L S -- Takalo, L -- Tavecchio, F -- Temnikov, P -- Tescaro, D -- Teshima, M -- Torres, D F -- Turini, N -- Vankov, H -- Wagner, R M -- Zabalza, V -- Zandanel, F -- Zanin, R -- Zapatero, J -- New York, N.Y. -- Science. 2009 Jul 24;325(5939):444-8. doi: 10.1126/science.1175406. Epub 2009 Jul 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Fred Lawrence Whipple Observatory, Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19574351" target="_blank"〉PubMed〈/a〉
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  • 7
    Publication Date: 2005-07-09
    Description: X-ray binaries are composed of a normal star in orbit around a neutron star or stellar-mass black hole. Radio and x-ray observations have led to the presumption that some x-ray binaries called microquasars behave as scaled-down active galactic nuclei. Microquasars have resolved radio emission that is thought to arise from a relativistic outflow akin to active galactic nuclei jets, in which particles can be accelerated to large energies. Very high energy gamma-rays produced by the interactions of these particles have been observed from several active galactic nuclei. Using the High Energy Stereoscopic System, we find evidence for gamma-ray emission of 〉100 gigaelectron volts from a candidate microquasar, LS 5039, showing that particles are also accelerated to very high energies in these systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aharonian, F -- Akhperjanian, A G -- Aye, K-M -- Bazer-Bachi, A R -- Beilicke, M -- Benbow, W -- Berge, D -- Berghaus, P -- Bernlohr, K -- Boisson, C -- Bolz, O -- Borrel, V -- Braun, I -- Breitling, F -- Brown, A M -- Bussons Gordo, J -- Chadwick, P M -- Chounet, L-M -- Cornils, R -- Costamante, L -- Degrange, B -- Dickinson, H J -- Djannati-Atai, A -- Drury, L O'c -- Dubus, G -- Emmanoulopoulos, D -- Espigat, P -- Feinstein, F -- Fleury, P -- Fontaine, G -- Fuchs, Y -- Funk, S -- Gallant, Y A -- Giebels, B -- Gillessen, S -- Glicenstein, J F -- Goret, P -- Hadjichristidis, C -- Hauser, M -- Heinzelmann, G -- Henri, G -- Hermann, G -- Hinton, J A -- Hofmann, W -- Holleran, M -- Horns, D -- Jacholkowska, A -- de Jager, O C -- Khelifi, B -- Komin, Nu -- Konopelko, A -- Latham, I J -- Le Gallou, R -- Lemiere, A -- Lemoine-Goumard, M -- Leroy, N -- Lohse, T -- Marcowith, A -- Martin, J-M -- Martineau-Huynh, O -- Masterson, C -- McComb, T J L -- de Naurois, M -- Nolan, S J -- Noutsos, A -- Orford, K J -- Osborne, J L -- Ouchrif, M -- Panter, M -- Pelletier, G -- Pita, S -- Puhlhofer, G -- Punch, M -- Raubenheimer, B C -- Raue, M -- Raux, J -- Rayner, S M -- Reimer, A -- Reimer, O -- Ripken, J -- Rob, L -- Rolland, L -- Rowell, G -- Sahakian, V -- Sauge, L -- Schlenker, S -- Schlickeiser, R -- Schuster, C -- Schwanke, U -- Siewert, M -- Sol, H -- Spangler, D -- Steenkamp, R -- Stegmann, C -- Tavernet, J-P -- Terrier, R -- Theoret, C G -- Tluczykont, M -- Vasileiadis, G -- Venter, C -- Vincent, P -- Volk, H J -- Wagner, S J -- New York, N.Y. -- Science. 2005 Jul 29;309(5735):746-9. Epub 2005 Jul 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Kernphysik, Post Office Box 103980, D-69029 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16002580" target="_blank"〉PubMed〈/a〉
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  • 8
    Publication Date: 2004-06-12
    Description: Before European contact, Hawai'i supported large human populations in complex societies that were based on multiple pathways of intensive agriculture. We show that soils within a long-abandoned 60-square-kilometer dryland agricultural complex are substantially richer in bases and phosphorus than are those just outside it, and that this enrichment predated the establishment of intensive agriculture. Climate and soil fertility combined to constrain large dryland agricultural systems and the societies they supported to well-defined portions of just the younger islands within the Hawaiian archipelago; societies on the older islands were based on irrigated wetland agriculture. Similar processes may have influenced the dynamics of agricultural intensification across the tropics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vitousek, P M -- Ladefoged, T N -- Kirch, P V -- Hartshorn, A S -- Graves, M W -- Hotchkiss, S C -- Tuljapurkar, S -- Chadwick, O A -- New York, N.Y. -- Science. 2004 Jun 11;304(5677):1665-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA. vitousek@stanford.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15192228" target="_blank"〉PubMed〈/a〉
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  • 9
    Publication Date: 2005-03-26
    Description: Very high energy gamma-rays probe the long-standing mystery of the origin of cosmic rays. Produced in the interactions of accelerated particles in astrophysical objects, they can be used to image cosmic particle accelerators. A first sensitive survey of the inner part of the Milky Way with the High Energy Stereoscopic System (HESS) reveals a population of eight previously unknown firmly detected sources of very high energy gamma-rays. At least two have no known radio or x-ray counterpart and may be representative of a new class of "dark" nucleonic cosmic ray sources.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aharonian, F -- Akhperjanian, A G -- Aye, K-M -- Bazer-Bachi, A R -- Beilicke, M -- Benbow, W -- Berge, D -- Berghaus, P -- Bernlohr, K -- Boisson, C -- Bolz, O -- Borgmeier, C -- Braun, I -- Breitling, F -- Brown, A M -- Gordo, J Bussons -- Chadwick, P M -- Chounet, L-M -- Cornils, R -- Costamante, L -- Degrange, B -- Djannati-Atai, A -- Drury, L O'C -- Dubus, G -- Ergin, T -- Espigat, P -- Feinstein, F -- Fleury, P -- Fontaine, G -- Funk, S -- Gallant, Y A -- Giebels, B -- Gillessen, S -- Goret, P -- Hadjichristidis, C -- Hauser, M -- Heinzelmann, G -- Henri, G -- Hermann, G -- Hinton, J A -- Hofmann, W -- Holleran, M -- Horns, D -- de Jager, O C -- Jung, I -- Khelifi, B -- Komin, Nu -- Konopelko, A -- Latham, I J -- Le Gallou, R -- Lemiere, A -- Lemoine, M -- Leroy, N -- Lohse, T -- Marcowith, A -- Masterson, C -- McComb, T J L -- de Naurois, M -- Nolan, S J -- Noutsos, A -- Orford, K J -- Osborne, J L -- Ouchrif, M -- Panter, M -- Pelletier, G -- Pita, S -- Puhlhofer, G -- Punch, M -- Raubenheimer, B C -- Raue, M -- Raux, J -- Rayner, S M -- Redondo, I -- Reimer, A -- Reimer, O -- Ripken, J -- Rob, L -- Rolland, L -- Rowell, G -- Sahakian, V -- Sauge, L -- Schlenker, S -- Schlickeiser, R -- Schuster, C -- Schwanke, U -- Siewert, M -- Sol, H -- Steenkamp, R -- Stegmann, C -- Tavernet, J-P -- Terrier, R -- Theoret, C G -- Tluczykont, M -- van der Walt, D J -- Vasileiadis, G -- Venter, C -- Vincent, P -- Visser, B -- Volk, H J -- Wagner, S J -- New York, N.Y. -- Science. 2005 Mar 25;307(5717):1938-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Kernphysik, Post Office Box 103980, D-69029 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15790849" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2016-05-22
    Description: River deltas worldwide are currently under threat of drowning and destruction by sea-level rise, subsidence, and oceanic storms, highlighting the need to quantify their growth processes. Deltas are built through construction of sediment lobes, and emerging theories suggest that the size of delta lobes scales with backwater hydrodynamics, but these ideas are difficult to test on natural deltas that evolve slowly. We show results of the first laboratory delta built through successive deposition of lobes that maintain a constant size. We show that the characteristic size of delta lobes emerges because of a preferential avulsion node—the location where the river course periodically and abruptly shifts—that remains fixed spatially relative to the prograding shoreline. The preferential avulsion node in our experiments is a consequence of multiple river floods and Froude-subcritical flows that produce persistent nonuniform flows and a peak in net channel deposition within the backwater zone of the coastal river. In contrast, experimental deltas without multiple floods produce flows with uniform velocities and delta lobes that lack a characteristic size. Results have broad applications to sustainable management of deltas and for decoding their stratigraphic record on Earth and Mars.
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
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