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  • Humans  (4)
  • American Association for the Advancement of Science (AAAS)  (4)
  • 1995-1999  (4)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (4)
Years
Year
  • 1
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    Real-time tracking of memory formation in the human rhinal cortex and hippocampus (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-08
    Description: A fundamental question about human memory is which brain structures are involved, and when, in transforming experiences into memories. This experiment sought to identify neural correlates of memory formation with the use of intracerebral electrodes implanted in the brains of patients with temporal lobe epilepsy. Event-related potentials (ERPs) were recorded directly from the medial temporal lobe (MTL) as the patients studied single words. ERPs elicited by words subsequently recalled in a memory test were contrasted with ERPs elicited by unrecalled words. Memory formation was associated with distinct but interrelated ERP differences within the rhinal cortex and the hippocampus, which arose after about 300 and 500 milliseconds, respectively. These findings suggest that declarative memory formation is dissociable into subprocesses and sequentially organized within the MTL.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fernandez, G -- Effern, A -- Grunwald, T -- Pezer, N -- Lehnertz, K -- Dumpelmann, M -- Van Roost, D -- Elger, C E -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1582-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Epileptology, University of Bonn, 53105 Bonn, Germany. gf@mailer.meb.uni-bonn.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10477525" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Analysis of Variance ; Brain Mapping ; Electrodes, Implanted ; Epilepsy, Temporal Lobe/physiopathology ; Evoked Potentials ; Female ; Hippocampus/*physiology ; Humans ; Magnetic Resonance Imaging ; Male ; Memory/*physiology ; Mental Recall/*physiology ; Middle Aged ; Neurons/physiology ; Temporal Lobe/*physiology ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Type IV pili, transient bacterial aggregates, and virulence of enteropathogenic Escherichia coli (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-06-26
    Description: Type IV bundle-forming pili of enteropathogenic Escherichia coli are required for the localized adherence and autoaggregation phenotypes. Whether these pili are also required for virulence was tested in volunteers by inactivating bfpA or bfpT (perA) encoding, respectively, the pilus subunit and the bfp operon transcriptional activator. Both mutants caused significantly less diarrhea. Mutation of the bfpF nucleotide-binding domain caused increased piliation, enhanced localized adherence, and abolished the twitching motility-dispersal phase of the autoaggregation phenotype. The bfpF mutant colonized the human intestine but was about 200-fold less virulent. Thus, BfpF is required for dispersal from the bacterial aggregate and for full virulence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bieber, D -- Ramer, S W -- Wu, C Y -- Murray, W J -- Tobe, T -- Fernandez, R -- Schoolnik, G K -- 1RO1-AI39521/AI/NIAID NIH HHS/ -- 1RO3-DK52038/DK/NIDDK NIH HHS/ -- MO1-RR00070/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1998 Jun 26;280(5372):2114-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Division of Infectious Diseases and Geographical Medicine, Stanford Program for Vaccine Research, Stanford University Medical Center, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9641917" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Agglutination ; Bacterial Adhesion ; Cell Membrane/ultrastructure ; Diarrhea/*microbiology ; Epithelial Cells/microbiology ; Escherichia coli/genetics/*pathogenicity/physiology/ultrastructure ; Escherichia coli Infections/*microbiology ; Fimbriae, Bacterial/genetics/*physiology/ultrastructure ; Humans ; Intestinal Mucosa/microbiology ; Middle Aged ; Mutation ; Operon ; Phenotype ; Tumor Cells, Cultured ; Virulence
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Evidence of early cannibalism (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-01-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fernandez-Jalvo, Y -- Diez, J C -- Bermudez de Castro, J M -- Carbonell, E -- Arsuaga, J L -- New York, N.Y. -- Science. 1996 Jan 19;271(5247):277-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8553055" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cannibalism/*history ; *Fossils ; History, Ancient ; *Hominidae ; Humans ; Spain
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Molecular cloning and disease association of hepatitis G virus: a transfusion-transmissible agent (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-01-26
    Description: An RNA virus, designated hepatitis G virus (HGV), was identified from the plasma of a patient with chronic hepatitis. Extension from an immunoreactive complementary DNA clone yielded the entire genome (9392 nucleotides) encoding a polyprotein of 2873 amino acids. The virus is closely related to GB virus C (GBV-C) and distantly related to hepatitis C virus, GBV-A, and GBV-B. HGV was associated with acute and chronic hepatitis. Persistent viremia was detected for up to 9 years in patients with hepatitis. The virus is transfusion-transmissible. It has a global distribution and is present within the volunteer blood donor population in the United States.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Linnen, J -- Wages, J Jr -- Zhang-Keck, Z Y -- Fry, K E -- Krawczynski, K Z -- Alter, H -- Koonin, E -- Gallagher, M -- Alter, M -- Hadziyannis, S -- Karayiannis, P -- Fung, K -- Nakatsuji, Y -- Shih, J W -- Young, L -- Piatak, M Jr -- Hoover, C -- Fernandez, J -- Chen, S -- Zou, J C -- Morris, T -- Hyams, K C -- Ismay, S -- Lifson, J D -- Hess, G -- Foung, S K -- Thomas, H -- Bradley, D -- Margolis, H -- Kim, J P -- New York, N.Y. -- Science. 1996 Jan 26;271(5248):505-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genelabs Technologies, Redwood City, CA 94063, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8560265" target="_blank"〉PubMed〈/a〉
    Keywords: Acute Disease ; Amino Acid Sequence ; Base Sequence ; Blood Donors ; Blood Transfusion/*adverse effects ; Blood-Borne Pathogens ; Chronic Disease ; Cloning, Molecular ; Consensus Sequence ; Disease Transmission, Infectious ; Flaviviridae/genetics ; Genome, Viral ; Hepatitis Viruses/chemistry/*genetics/isolation & purification ; Hepatitis, Viral, Human/epidemiology/transmission/*virology ; Humans ; Molecular Sequence Data ; Polymerase Chain Reaction ; RNA Viruses/chemistry/*genetics/isolation & purification ; RNA, Viral/blood/genetics ; Sequence Alignment ; United States/epidemiology ; Viral Proteins/chemistry/genetics ; Viremia/epidemiology/virology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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