Now showing items 375-394 of 806

  • Ionic composition of endolymph and perilymph in the inner ear of the oyster toadfish, Opsanus tau 

    Ghanem, Tamer A.; Breneman, Kathryn D.; Rabbitt, Richard D.; Brown, H. Mack (Marine Biological Laboratory, 2008-02)
    The concentrations of free Na+, K+, Ca2+, and Cl-in endolymph and perilymph from the inner ear of the oyster toadfish, Opsanus tau, were measured in vivo using double-barreled ion-selective electrodes. Perilymph concentrations ...
  • Iron supplementation does not worsen respiratory health or alter the sputum microbiome in cystic fibrosis 

    Gifford, Alex H.; Alexandru, Diana M.; Li, Zhigang; Dorman, Dana B.; Moulton, Lisa A.; Price, Katherine E.; Hampton, Thomas H.; Sogin, Mitchell L.; Zuckerman, Jonathan B.; Parker, H. Worth; Stanton, Bruce A.; O'Toole, George A. (2013-10)
    Iron supplementation for hypoferremic anemia could potentiate bacterial growth in the cystic fibrosis (CF) lung, but clinical trials testing this hypothesis are lacking. Twenty-two adults with CF and hypoferremic anemia ...
  • Is science as global as we think? 

    Wong, Bob B. M.; Kokko, Hanna (2005)
    A cornerstone of scientific practice is the perceived freedom with which knowledge is disseminated. But does the scientific community make good use of all that is available? Researchers have, on occasion, been accused of ...
  • Is the northern high-latitude land-based CO2 sink weakening? 

    Hayes, Daniel J.; McGuire, A. David; Kicklighter, David W.; Gurney, Kevin R.; Burnside, T. J.; Melillo, Jerry M. (American Geophysical Union, 2011-08-30)
    Studies indicate that, historically, terrestrial ecosystems of the northern high-latitude region may have been responsible for up to 60% of the global net land-based sink for atmospheric CO2. However, these regions have ...
  • Isolated communities of Epsilonproteobacteria in hydrothermal vent fluids of the Mariana Arc seamounts 

    Huber, Julie A.; Cantin, Holly V.; Huse, Susan M.; Mark Welch, David B.; Sogin, Mitchell L.; Butterfield, David A. (2010-05)
    Low-temperature hydrothermal vent fluids represent access points to diverse microbial communities living in oceanic crust. This study examined the distribution, relative abundance, and diversity of Epsilonproteobacteria ...
  • Isolation and ultrastructural characterization of squid synaptic vesicles 

    Pekkurnaz, Gulcin; Fera, Andrea; Zimmerberg-Helms, Jessica; DeGiorgis, Joseph A.; Bezrukov, Ludmila; Blank, Paul S.; Mazar, Julia; Reese, Thomas S.; Zimmerberg, Joshua (Marine Biological Laboratory, 2011-04)
    Synaptic vesicles contain a variety of proteins and lipids that mediate fusion with the pre-synaptic membrane. Although the structures of many synaptic vesicle proteins are known, an overall picture of how they are organized ...
  • Isotopic signals (18O, 2H, 3H) of six major rivers draining the pan-Arctic watershed 

    Yi, Y.; Gibson, J. J.; Cooper, Lee W.; Helie, J.-F.; Birks, S. J.; McClelland, James W.; Holmes, Robert M.; Peterson, Bruce J. (American Geophysical Union, 2012-03-22)
    We present the results of a 4-year collaborative sampling effort that measured δ18O, δ2H values and 3H activities in the six largest Arctic rivers (the Ob, Yenisey, Lena, Kolyma, Yukon and Mackenzie). Using consistent ...
  • The karyomastigont as an evolutionary seme 

    Chapman, Michael; Alliegro, Mark C. (University of Chicago Press, 2012-12)
    The problem of eukaryogenesis—the evolutionary mechanism whereby eukaryotic cells evolved from prokaryotes—remains one of the great unsolved mysteries of cell biology, possibly due to the reductionist tendency of most ...
  • Killer whales and marine mammal trends in the North Pacific : a re-examination of evidence for sequential megafauna collapse and the prey-switching hypothesis 

    Wade, Paul R.; Burkanov, Vladimir N.; Dahlheim, Marilyn E.; Friday, Nancy A.; Fritz, Lowell W.; Loughlin, Thomas R.; Mizroch, Sally A.; Muto, Marcia M.; Rice, Dale W.; Barrett-Lennard, Lance G.; Black, Nancy A.; Burdin, Alexander M.; Calambokidis, John; Cerchio, Sal; Ford, John K. B.; Jacobsen, Jeff K.; Matkin, Craig O.; Matkin, Dena R.; Mehta, Amee V.; Small, Robert J.; Straley, Janice M.; McCluskey, Shannon M.; VanBlaricom, Glenn R. (Blackwell, 2007-10-26)
    Springer et al. (2003) contend that sequential declines occurred in North Pacific populations of harbor and fur seals, Steller sea lions, and sea otters. They hypothesize that these were due to increased predation by killer ...
  • Kin and population recognition in sympatric Lake Constance perch (Perca fluviatilis L.) : can assortative shoaling drive population divergence? 

    Behrmann-Godel, Jasminca; Gerlach, Gabriele; Eckmann, Reiner (2005-08-02)
    Prior studies have shown that perch (Perca fluviatilis L.) of Lake Constance belong to two genetically different but sympatric populations, and that local aggregations of juveniles and adults contain closely related kin. ...
  • Kinesin family member 6 (kif6) is necessary for spine development in zebrafish 

    Buchan, Jillian G.; Gray, Ryan S.; Gansner, John M.; Alvarado, David M.; Burgert, Lydia; Gitlin, Jonathan D.; Gurnett, Christina A.; Goldsmith, Matthew I. (2014-06)
    Idiopathic scoliosis is a form of spinal deformity that affects 2–3% of children and results in curvature of the spine without structural defects of the vertebral units. The pathogenesis of idiopathic scoliosis remains ...
  • Kinetic framework of spindle assembly checkpoint signaling 

    Dick, Amalie E.; Gerlich, Daniel W. (2013-08)
    The mitotic spindle assembly checkpoint (SAC) delays anaphase onset until all chromosomes have attached to both spindle poles1, 2. Here, we investigated SAC signaling kinetics in response to acute detachment of individual ...
  • Kinetochore alignment within the metaphase plate is regulated by centromere stiffness and microtubule depolymerases 

    Jaqaman, Khuloud; King, Emma M.; Amaro, Ana C.; Winter, Jennifer R.; Dorn, Jonas F.; Elliott, Hunter L.; Mchedlishvili, Nunu; McClelland, Sarah E.; Porter, Iain M.; Posch, Markus; Toso, Alberto; Danuser, Gaudenz; McAinsh, Andrew D.; Meraldi, Patrick; Swedlow, Jason R. (Rockefeller University Press, 2010-03-08)
    During mitosis in most eukaryotic cells, chromosomes align and form a metaphase plate halfway between the spindle poles, about which they exhibit oscillatory movement. These movements are accompanied by changes in the ...
  • Kinetochore fiber formation in animal somatic cells : dueling mechanisms come to a draw 

    Rieder, Conly L. (2005-09-12)
    The attachment to and movement of a chromosome on the mitotic spindle is mediated by the formation of a bundle of microtubules (MTs) that tethers the kinetochore on the chromosome to a spindle pole. The origin of these ...
  • Kinetochore-driven outgrowth of microtubules is a central contributor to kinetochore fiber maturation in crane-fly spermatocytes 

    LaFountain, James R.; Oldenbourg, Rudolf (American Society for Cell Biology, 2014-02-26)
    We use liquid crystal polarized light imaging to record the life histories of single kinetochore (K-) fibers in living crane-fly spermatocytes, from their origins as nascent K-fibers in early prometaphase to their fully ...
  • Lability of DOC transported by Alaskan rivers to the Arctic Ocean 

    Holmes, Robert M.; McClelland, James W.; Raymond, Peter A.; Frazer, Breton B.; Peterson, Bruce J.; Stieglitz, Marc (American Geophysical Union, 2008-02-09)
    Arctic rivers transport huge quantities of dissolved organic carbon (DOC) to the Arctic Ocean. The prevailing paradigm is that DOC in arctic rivers is refractory and therefore of little significance for the biogeochemistry ...
  • Lack of growth enhancement by exogenous growth hormone treatment in yellow perch (Perca flavescens) in four separate experiments 

    Jentoft, Sissel; Topp, Nicole; Seeliger, Matthew; Malison, Jeffrey A.; Barry, Terence P.; Held, James A.; Roberts, Steven B.; Goetz, Frederick W. (2005-03-02)
    The effect of exogenous growth hormone (GH) treatment on the growth of juvenile yellow perch (Perca flavescens) was investigated in four experiments. In the first two experiments, juvenile yellow perch were reared at either ...
  • Land carbon sequestration within the conterminous United States : regional- and state-level analyses 

    Lu, Xiaoliang; Kicklighter, David W.; Melillo, Jerry M.; Reilly, John M.; Xu, Liyi (John Wiley & Sons, 2015-02-28)
    A quantitative understanding of the rate at which land ecosystems are sequestering or losing carbon at national-, regional-, and state-level scales is needed to develop policies to mitigate climate change. In this study, ...
  • A land-to-ocean perspective on the magnitude, source and implication of DIC flux from major Arctic rivers to the Arctic Ocean 

    Tank, Suzanne E.; Raymond, Peter A.; Striegl, Robert G.; McClelland, James W.; Holmes, Robert M.; Fiske, Gregory J.; Peterson, Bruce J. (American Geophysical Union, 2012-12-14)
    A series of seasonally distributed measurements from the six largest Arctic rivers (the Ob', Yenisey, Lena, Kolyma, Yukon and Mackenzie) was used to examine the magnitude and significance of Arctic riverine DIC flux to ...
  • Landscape heterogeneity and the biodiversity of Arctic stream communities : a habitat template analysis 

    Huryn, Alexander D.; Slavik, Karie A.; Lowe, Rex L.; Parker, Stephanie M.; Anderson, Dennis S.; Peterson, Bruce J. (National Research Council Canada, 2005-08-27)
    We predicted that substratum freezing and instability are major determinants of the variability of stream community structure in Arctic Alaska. Their effects were conceptualized as a two-dimensional habitat template that ...