Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Keywords: Medicine ; Human Genetics ; Public Health ; Epidemiology ; Bioinformatics ; Biomedicine ; Human Genetics ; Computational Biology/Bioinformatics ; Public Health/Gesundheitswesen ; Epidemiology ; Springer eBooks
    Pages: : digital
    ISBN: 9781441914828
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    Unknown
    Dordrecht : Springer Science+Business Media B.V.
    Keywords: Life sciences ; Science (General) ; Agriculture ; Endangered ecosystems ; Environmental management ; Development Economics ; Life sciences ; Agriculture ; Environmental management ; Ecosystems ; Science, general ; Development Economics ; Springer eBooks
    Pages: : digital
    ISBN: 9789400714120
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2012-07-17
    Description: Alterations in intestinal microbiota composition are associated with several chronic conditions, including obesity and inflammatory diseases. The microbiota of older people displays greater inter-individual variation than that of younger adults. Here we show that the faecal microbiota composition from 178 elderly subjects formed groups, correlating with residence location in the community, day-hospital, rehabilitation or in long-term residential care. However, clustering of subjects by diet separated them by the same residence location and microbiota groupings. The separation of microbiota composition significantly correlated with measures of frailty, co-morbidity, nutritional status, markers of inflammation and with metabolites in faecal water. The individual microbiota of people in long-stay care was significantly less diverse than that of community dwellers. Loss of community-associated microbiota correlated with increased frailty. Collectively, the data support a relationship between diet, microbiota and health status, and indicate a role for diet-driven microbiota alterations in varying rates of health decline upon ageing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Claesson, Marcus J -- Jeffery, Ian B -- Conde, Susana -- Power, Susan E -- O'Connor, Eibhlis M -- Cusack, Siobhan -- Harris, Hugh M B -- Coakley, Mairead -- Lakshminarayanan, Bhuvaneswari -- O'Sullivan, Orla -- Fitzgerald, Gerald F -- Deane, Jennifer -- O'Connor, Michael -- Harnedy, Norma -- O'Connor, Kieran -- O'Mahony, Denis -- van Sinderen, Douwe -- Wallace, Martina -- Brennan, Lorraine -- Stanton, Catherine -- Marchesi, Julian R -- Fitzgerald, Anthony P -- Shanahan, Fergus -- Hill, Colin -- Ross, R Paul -- O'Toole, Paul W -- England -- Nature. 2012 Aug 9;488(7410):178-84. doi: 10.1038/nature11319.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, University College Cork, Ireland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22797518" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Aged, 80 and over ; Aging/*physiology ; Cohort Studies ; Diet/*statistics & numerical data ; Diet Surveys ; Feces/*microbiology ; Fruit ; Geriatric Assessment ; Health ; *Health Status ; Health Surveys ; Homes for the Aged ; Hospitals, Community ; Humans ; Intestines/*microbiology ; Meat ; Metagenome/*physiology ; Rehabilitation Centers ; Surveys and Questionnaires ; Vegetables
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2011-10-15
    Description: Rotary motors of conventional design can be rather complex and are therefore difficult to miniaturize; previous carbon nanotube artificial muscles provide contraction and bending, but not rotation. We show that an electrolyte-filled twist-spun carbon nanotube yarn, much thinner than a human hair, functions as a torsional artificial muscle in a simple three-electrode electrochemical system, providing a reversible 15,000 degrees rotation and 590 revolutions per minute. A hydrostatic actuation mechanism, as seen in muscular hydrostats in nature, explains the simultaneous occurrence of lengthwise contraction and torsional rotation during the yarn volume increase caused by electrochemical double-layer charge injection. The use of a torsional yarn muscle as a mixer for a fluidic chip is demonstrated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Foroughi, Javad -- Spinks, Geoffrey M -- Wallace, Gordon G -- Oh, Jiyoung -- Kozlov, Mikhail E -- Fang, Shaoli -- Mirfakhrai, Tissaphern -- Madden, John D W -- Shin, Min Kyoon -- Kim, Seon Jeong -- Baughman, Ray H -- New York, N.Y. -- Science. 2011 Oct 28;334(6055):494-7. doi: 10.1126/science.1211220. Epub 2011 Oct 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21998253" target="_blank"〉PubMed〈/a〉
    Keywords: *Biomimetic Materials ; Electrodes ; Electrolytes ; *Muscles ; *Nanotubes, Carbon ; Rotation ; Torque ; Torsion, Mechanical
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Signatur Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2011-10-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Birch, Kristi -- Blackburn, Carol -- Brody, Linda -- Wallace, Patricia -- New York, N.Y. -- Science. 2011 Oct 28;334(6055):467-8. doi: 10.1126/science.1196983.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Johns Hopkins University Center for Talented Youth, Baltimore, MD 21209, USA. kbirch@jhu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22034426" target="_blank"〉PubMed〈/a〉
    Keywords: Awards and Prizes ; Engineering ; *Internet ; Mathematics ; *Science ; Technology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Signatur Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2012-08-11
    Description: Biological dinitrogen fixation provides the largest input of nitrogen to the oceans, therefore exerting important control on the ocean's nitrogen inventory and primary productivity. Nitrogen-isotope data from ocean sediments suggest that the marine-nitrogen inventory has been balanced for the past 3,000 years (ref. 4). Producing a balanced marine-nitrogen budget based on direct measurements has proved difficult, however, with nitrogen loss exceeding the gain from dinitrogen fixation by approximately 200 Tg N yr-1 (refs 5, 6). Here we present data from the Atlantic Ocean and show that the most widely used method of measuring oceanic N2-fixation rates underestimates the contribution of N2-fixing microorganisms (diazotrophs) relative to a newly developed method. Using molecular techniques to quantify the abundance of specific clades of diazotrophs in parallel with rates of 15N2 incorporation into particulate organic matter, we suggest that the difference between N2-fixation rates measured with the established method and those measured with the new method can be related to the composition of the diazotrophic community. Our data show that in areas dominated by Trichodesmium, the established method underestimates N2-fixation rates by an average of 62%. We also find that the newly developed method yields N2-fixation rates more than six times higher than those from the established method when unicellular, symbiotic cyanobacteria and gamma-proteobacteria dominate the diazotrophic community. On the basis of average areal rates measured over the Atlantic Ocean, we calculated basin-wide N2-fixation rates of 14 +/- 1 Tg N yr-1 and 24 +/-1 Tg N yr-1 for the established and new methods, respectively. If our findings can be extrapolated to other ocean basins, this suggests that the global marine N2-fixation rate derived from direct measurements may increase from 103 +/- 8 Tg N yr-1 to 177 +/- 8 Tg N yr-1, and that the contribution of N2 fixers other than Trichodesmium is much more significant than was previously thought.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grosskopf, Tobias -- Mohr, Wiebke -- Baustian, Tina -- Schunck, Harald -- Gill, Diana -- Kuypers, Marcel M M -- Lavik, Gaute -- Schmitz, Ruth A -- Wallace, Douglas W R -- LaRoche, Julie -- England -- Nature. 2012 Aug 16;488(7411):361-4. doi: 10.1038/nature11338.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Helmholtz Centre for Ocean Research Kiel, Kiel, Germany. tgrosskopf@geomar.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22878720" target="_blank"〉PubMed〈/a〉
    Keywords: Aquatic Organisms/*metabolism ; Atlantic Ocean ; Cyanobacteria/genetics/metabolism ; Diatoms/metabolism ; Kinetics ; Nitrogen/*metabolism ; Nitrogen Fixation/*physiology ; Oxidoreductases/genetics ; Proteobacteria/genetics/metabolism ; Seawater/chemistry ; Taq Polymerase/metabolism ; Temperature ; Tropical Climate
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Signatur Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2013-05-28
    Description: Fusing left and right eye images into a single view is dependent on precise ocular alignment, which relies on coordinated eye movements. During movements of the head this alignment is maintained by numerous reflexes. Although rodents share with other mammals the key components of eye movement control, the coordination of eye movements in freely moving rodents is unknown. Here we show that movements of the two eyes in freely moving rats differ fundamentally from the precisely controlled eye movements used by other mammals to maintain continuous binocular fusion. The observed eye movements serve to keep the visual fields of the two eyes continuously overlapping above the animal during free movement, but not continuously aligned. Overhead visual stimuli presented to rats freely exploring an open arena evoke an immediate shelter-seeking behaviour, but are ineffective when presented beside the arena. We suggest that continuously overlapping visual fields overhead would be of evolutionary benefit for predator detection by minimizing blind spots.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, Damian J -- Greenberg, David S -- Sawinski, Juergen -- Rulla, Stefanie -- Notaro, Giuseppe -- Kerr, Jason N D -- England -- Nature. 2013 Jun 6;498(7452):65-9. doi: 10.1038/nature12153. Epub 2013 May 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Network Imaging Group, Max Planck Institute for Biological Cybernetics, Spemannstrasse 41, 72076 Tubingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23708965" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Escape Reaction/physiology ; Exploratory Behavior/physiology ; Eye Movements/physiology ; Head/physiology ; Models, Biological ; Movement/physiology ; Optic Disk/physiology ; Predatory Behavior ; Rats ; Retina/physiology ; Vision, Binocular/*physiology ; Visual Fields/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Signatur Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2014-05-09
    Description: Rapid Arctic warming and sea-ice reduction in the Arctic Ocean are widely attributed to anthropogenic climate change. The Arctic warming exceeds the global average warming because of feedbacks that include sea-ice reduction and other dynamical and radiative feedbacks. We find that the most prominent annual mean surface and tropospheric warming in the Arctic since 1979 has occurred in northeastern Canada and Greenland. In this region, much of the year-to-year temperature variability is associated with the leading mode of large-scale circulation variability in the North Atlantic, namely, the North Atlantic Oscillation. Here we show that the recent warming in this region is strongly associated with a negative trend in the North Atlantic Oscillation, which is a response to anomalous Rossby wave-train activity originating in the tropical Pacific. Atmospheric model experiments forced by prescribed tropical sea surface temperatures simulate the observed circulation changes and associated tropospheric and surface warming over northeastern Canada and Greenland. Experiments from the Coupled Model Intercomparison Project Phase 5 (ref. 16) models with prescribed anthropogenic forcing show no similar circulation changes related to the North Atlantic Oscillation or associated tropospheric warming. This suggests that a substantial portion of recent warming in the northeastern Canada and Greenland sector of the Arctic arises from unforced natural variability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ding, Qinghua -- Wallace, John M -- Battisti, David S -- Steig, Eric J -- Gallant, Ailie J E -- Kim, Hyung-Jin -- Geng, Lei -- England -- Nature. 2014 May 8;509(7499):209-12. doi: 10.1038/nature13260.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, Seattle, Washington 98195, USA. ; Department of Atmospheric Sciences, University of Washington, Seattle, Washington 98195, USA. ; School of Geography and Environmental Science, Monash University, Victoria 3800, Australia. ; Climate Research Department, APEC Climate Center, 12 Centum 7-ro, Haeundae-gu, Busan 612-020, South Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24805345" target="_blank"〉PubMed〈/a〉
    Keywords: Air ; Arctic Regions ; Canada ; *Feedback ; Global Warming/*statistics & numerical data ; Greenland ; Hot Temperature ; Human Activities ; Ice Cover ; Models, Theoretical ; Pacific Ocean ; Seawater ; *Tropical Climate
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Signatur Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2011-05-14
    Description: Supercapacitors, also called ultracapacitors or electrochemical capacitors, store electrical charge on high-surface-area conducting materials. Their widespread use is limited by their low energy storage density and relatively high effective series resistance. Using chemical activation of exfoliated graphite oxide, we synthesized a porous carbon with a Brunauer-Emmett-Teller surface area of up to 3100 square meters per gram, a high electrical conductivity, and a low oxygen and hydrogen content. This sp(2)-bonded carbon has a continuous three-dimensional network of highly curved, atom-thick walls that form primarily 0.6- to 5-nanometer-width pores. Two-electrode supercapacitor cells constructed with this carbon yielded high values of gravimetric capacitance and energy density with organic and ionic liquid electrolytes. The processes used to make this carbon are readily scalable to industrial levels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhu, Yanwu -- Murali, Shanthi -- Stoller, Meryl D -- Ganesh, K J -- Cai, Weiwei -- Ferreira, Paulo J -- Pirkle, Adam -- Wallace, Robert M -- Cychosz, Katie A -- Thommes, Matthias -- Su, Dong -- Stach, Eric A -- Ruoff, Rodney S -- New York, N.Y. -- Science. 2011 Jun 24;332(6037):1537-41. doi: 10.1126/science.1200770. Epub 2011 May 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21566159" 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
    Signatur Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2014-02-22
    Description: The high cost of powerful, large-stroke, high-stress artificial muscles has combined with performance limitations such as low cycle life, hysteresis, and low efficiency to restrict applications. We demonstrated that inexpensive high-strength polymer fibers used for fishing line and sewing thread can be easily transformed by twist insertion to provide fast, scalable, nonhysteretic, long-life tensile and torsional muscles. Extreme twisting produces coiled muscles that can contract by 49%, lift loads over 100 times heavier than can human muscle of the same length and weight, and generate 5.3 kilowatts of mechanical work per kilogram of muscle weight, similar to that produced by a jet engine. Woven textiles that change porosity in response to temperature and actuating window shutters that could help conserve energy were also demonstrated. Large-stroke tensile actuation was theoretically and experimentally shown to result from torsional actuation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haines, Carter S -- Lima, Marcio D -- Li, Na -- Spinks, Geoffrey M -- Foroughi, Javad -- Madden, John D W -- Kim, Shi Hyeong -- Fang, Shaoli -- Jung de Andrade, Monica -- Goktepe, Fatma -- Goktepe, Ozer -- Mirvakili, Seyed M -- Naficy, Sina -- Lepro, Xavier -- Oh, Jiyoung -- Kozlov, Mikhail E -- Kim, Seon Jeong -- Xu, Xiuru -- Swedlove, Benjamin J -- Wallace, Gordon G -- Baughman, Ray H -- New York, N.Y. -- Science. 2014 Feb 21;343(6173):868-72. doi: 10.1126/science.1246906.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24558156" target="_blank"〉PubMed〈/a〉
    Keywords: *Cotton Fiber ; Humans ; Muscles/chemistry/ultrastructure ; *Nylons ; Polymers ; Porosity ; *Tensile Strength ; *Torsion, Mechanical
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...