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  • Male  (799)
  • Chemistry
  • American Association for the Advancement of Science (AAAS)  (807)
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  • 2005-2009  (807)
  • 1
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    Altruistic helping in human infants and young chimpanzees (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-04
    Beschreibung: Human beings routinely help others to achieve their goals, even when the helper receives no immediate benefit and the person helped is a stranger. Such altruistic behaviors (toward non-kin) are extremely rare evolutionarily, with some theorists even proposing that they are uniquely human. Here we show that human children as young as 18 months of age (prelinguistic or just-linguistic) quite readily help others to achieve their goals in a variety of different situations. This requires both an understanding of others' goals and an altruistic motivation to help. In addition, we demonstrate similar though less robust skills and motivations in three young chimpanzees.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warneken, Felix -- Tomasello, Michael -- New York, N.Y. -- Science. 2006 Mar 3;311(5765):1301-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany. warneken@eva.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16513986" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; *Altruism ; Animals ; Behavior, Animal ; Child, Preschool ; Female ; *Helping Behavior ; Humans ; Male ; Motivation ; Pan troglodytes/*psychology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 2
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    An antigen produced by splicing of noncontiguous peptides in the reverse order (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-09-09
    Beschreibung: CD8-positive T lymphocytes recognize peptides that are usually derived from the degradation of cellular proteins and are presented by class I molecules of the major histocompatibility complex. Here we describe a human minor histocompatibility antigen created by a polymorphism in the SP110 nuclear phosphoprotein gene. The antigenic peptide comprises two noncontiguous SP110 peptide segments spliced together in reverse order to that in which they occur in the predicted SP110 protein. The antigenic peptide could be produced in vitro by incubation of precursor peptides with highly purified 20S proteasomes. Cutting and splicing probably occur within the proteasome by transpeptidation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warren, Edus H -- Vigneron, Nathalie J -- Gavin, Marc A -- Coulie, Pierre G -- Stroobant, Vincent -- Dalet, Alexandre -- Tykodi, Scott S -- Xuereb, Suzanne M -- Mito, Jeffrey K -- Riddell, Stanley R -- Van den Eynde, Benoit J -- CA106512/CA/NCI NIH HHS/ -- CA18029/CA/NCI NIH HHS/ -- P01 CA018029/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2006 Sep 8;313(5792):1444-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Immunology, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16960008" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alleles ; Amino Acid Motifs ; Amino Acid Sequence ; Amino Acid Substitution ; *Antigen Presentation ; B-Lymphocytes/immunology ; Cell Line, Transformed ; Cytotoxicity, Immunologic ; Electroporation ; HLA-A Antigens/immunology ; Humans ; Interferon-gamma/metabolism ; Male ; Middle Aged ; Minor Histocompatibility Antigens/genetics/*immunology/*metabolism ; Molecular Sequence Data ; Nuclear Proteins/chemistry/genetics/*immunology/*metabolism ; Peptide Fragments/metabolism ; Polymorphism, Single Nucleotide ; Proteasome Endopeptidase Complex/metabolism ; *Protein Splicing ; T-Lymphocytes, Cytotoxic/*immunology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 3
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    Debating sexual selection and mating strategies (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-05-09
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ghiselin, Michael T -- New York, N.Y. -- Science. 2006 May 5;312(5774):689-97; author reply 689-97.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16680820" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Female ; Male ; *Sexual Behavior, Animal ; *Social Behavior
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 4
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    Characterization of the piRNA complex from rat testes (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-17
    Beschreibung: Small noncoding RNAs regulate processes essential for cell growth and development, including mRNA degradation, translational repression, and transcriptional gene silencing (TGS). During a search for candidate mammalian factors for TGS, we purified a complex that contains small RNAs and Riwi, the rat homolog to human Piwi. The RNAs, frequently 29 to 30 nucleotides in length, are called Piwi-interacting RNAs (piRNAs), 94% of which map to 100 defined (〈 or = 101 kb) genomic regions. Within these regions, the piRNAs generally distribute across only one genomic strand or distribute on two strands but in a divergent, nonoverlapping manner. Preparations of piRNA complex (piRC) contain rRecQ1, which is homologous to qde-3 from Neurospora, a gene implicated in silencing pathways. Piwi has been genetically linked to TGS in flies, and slicer activity cofractionates with the purified complex. These results are consistent with a gene-silencing role for piRC in mammals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lau, Nelson C -- Seto, Anita G -- Kim, Jinkuk -- Kuramochi-Miyagawa, Satomi -- Nakano, Toru -- Bartel, David P -- Kingston, Robert E -- New York, N.Y. -- Science. 2006 Jul 21;313(5785):363-7. Epub 2006 Jun 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16778019" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenosine Triphosphatases/isolation & purification/metabolism ; Animals ; Chromosomes, Mammalian ; Conserved Sequence ; DNA Helicases/isolation & purification/metabolism ; Gene Library ; Genome ; Male ; Mice ; Proteins/isolation & purification/*metabolism ; *RNA Interference ; RNA, Untranslated/chemistry/genetics/isolation & purification/*metabolism ; Rats ; Rats, Sprague-Dawley ; RecQ Helicases ; Ribonucleoproteins/chemistry/isolation & purification/*metabolism ; Testis/*chemistry ; Transcription, Genetic
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
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    HIV testing and individual rights (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-10-21
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mills, Edward -- Rennie, Stuart -- New York, N.Y. -- Science. 2006 Oct 20;314(5798):417-9; author reply 417-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17053128" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *AIDS Serodiagnosis ; Female ; HIV Infections/*diagnosis/prevention & control ; *Human Rights ; Humans ; Male ; Mandatory Testing ; Prejudice
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 6
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    Language control in the bilingual brain (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-06-10
    Beschreibung: How does the bilingual brain distinguish and control which language is in use? Previous functional imaging experiments have not been able to answer this question because proficient bilinguals activate the same brain regions irrespective of the language being tested. Here, we reveal that neuronal responses within the left caudate are sensitive to changes in the language or the meaning of words. By demonstrating this effect in populations of German-English and Japanese-English bilinguals, we suggest that the left caudate plays a universal role in monitoring and controlling the language in use.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Crinion, J -- Turner, R -- Grogan, A -- Hanakawa, T -- Noppeney, U -- Devlin, J T -- Aso, T -- Urayama, S -- Fukuyama, H -- Stockton, K -- Usui, K -- Green, D W -- Price, C J -- 051067/Wellcome Trust/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2006 Jun 9;312(5779):1537-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome Department of Imaging Neuroscience, University College London, London WC1N 3BG, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16763154" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Brain Mapping ; Caudate Nucleus/*physiology ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; *Multilingualism ; Neurons/physiology ; Positron-Emission Tomography ; Semantics
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 7
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    Society of Vertebrate Paleontology meeting. Crestfallen: sexually dimorphic no more (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-11-11
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, Erik -- New York, N.Y. -- Science. 2006 Nov 10;314(5801):921.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17095674" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alberta ; Animals ; Biological Evolution ; *Dinosaurs/anatomy & histology/classification ; Female ; *Fossils ; Geologic Sediments ; Male ; Sex Characteristics ; Skull/anatomy & histology ; Species Specificity
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 8
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    Paleoanthropology. How the hobbit shrugged: tiny hominid's story takes new turn (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-05-20
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Culotta, Elizabeth -- New York, N.Y. -- Science. 2006 May 19;312(5776):983-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16709753" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Biological Evolution ; Body Height ; Female ; *Fossils ; History, Ancient ; *Hominidae/anatomy & histology ; Humans ; Indonesia ; Male ; Skeleton
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 9
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    Male fertility and sex ratio at birth in red deer (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-12-02
    Beschreibung: Efforts to test sex ratio theory have focused mostly on females. However, when males possess traits that could enhance the reproductive success of sons, males would also benefit from the manipulation of the offspring sex ratio. We tested the prediction that more-fertile red deer males produce more sons. Our findings reveal that male fertility is positively related to the proportion of male offspring. We also show that there is a positive correlation between the percentage of morphologically normal spermatozoa (a main determinant of male fertility) and the proportion of male offspring. Thus, males may contribute significantly to biases in sex ratio at birth among mammals, creating the potential for conflicts of interest between males and females.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gomendio, Montserrat -- Malo, Aurelio F -- Soler, Ana J -- Fernandez-Santos, Maria R -- Esteso, Milagros C -- Garcia, Andres J -- Roldan, Eduardo R S -- Garde, Julian -- New York, N.Y. -- Science. 2006 Dec 1;314(5804):1445-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Reproductive Ecology and Biology Group, Department of Evolutionary Ecology, Museo Nacional de Ciencias Naturales [Consejo Superior de Investigaciones Cientificas (CSIC)], 28006-Madrid, Spain. montseg@mncn.csic.es〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17138900" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Deer/*physiology ; Female ; *Fertility ; Fertilization ; Male ; Reproduction ; *Sex Ratio ; Sperm Motility ; Spermatozoa/cytology ; X Chromosome ; Y Chromosome
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 10
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    Homoploid hybrid speciation in an extreme habitat (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-12-02
    Beschreibung: According to theory, homoploid hybrid speciation, which is hybrid speciation without a change in chromosome number, is facilitated by adaptation to a novel or extreme habitat. Using molecular and ecological data, we found that the alpine-adapted butterflies in the genus Lycaeides are the product of hybrid speciation. The alpine populations possess a mosaic genome derived from both L. melissa and L. idas and are differentiated from and younger than their putative parental species. As predicted, adaptive traits may allow for persistence in the environmentally extreme alpine habitat and reproductively isolate these populations from their parental species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gompert, Zachariah -- Fordyce, James A -- Forister, Matthew L -- Shapiro, Arthur M -- Nice, Chris C -- New York, N.Y. -- Science. 2006 Dec 22;314(5807):1923-5. Epub 2006 Nov 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Population and Conservation Biology Program, Texas State University, San Marcos, TX 78666, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17138866" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adaptation, Physiological ; Alleles ; Altitude ; Animals ; Astragalus Plant ; Bayes Theorem ; Butterflies/anatomy & histology/*genetics/physiology ; *Ecosystem ; Female ; Gene Flow ; *Genetic Speciation ; Genome ; Geography ; *Hybridization, Genetic ; Male ; Microsatellite Repeats ; North America ; Ploidies ; Reproduction
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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