Now showing items 251-270 of 930

    • Endoplasmic reticulum targeted GFP reveals ER organization in tobacco NT-1 cells during cell division 

      Gupton, S. L.; Collings, D. A.; Allen, N. S. (2005-11-07)
      The endoplasmic reticulum (ER) of plant cells undergoes a drastic reorganization during cell division. In tobacco NT-1 cells that stably express a GFP construct targeted to the ER, we have mapped the reorganization of ...
    • Endosymbiosis : lessons in conflict resolution 

      Wernegreen, Jennifer J. (Public Library of Science (PLoS), 2004-03-16)
      Symbiosis, an interdependent relationship between two species, is an important driver of evolutionary novelty and ecological diversity. Microbial symbionts in particular have been major evolutionary catalysts throughout ...
    • Enhancement of nitrate removal at the sediment-water interface by carbon addition plus vertical mixing 

      Chen, Xuechu; He, Shengbing; Zhang, Yueping; Huang, Xiaobo; Huang, Yingying; Chen, Danyue; Huang, Xiaochen; Tang, Jianwu (2014-12)
      Wetlands and ponds are frequently used to remove nitrate from effluents or runoffs. However, the efficiency of this approach is limited. Based on the assumption that introducing vertical mixing to water column plus carbon ...
    • Entropy-driven formation of a chiral liquid-crystalline phase of helical filaments 

      Barry, Edward; Hensel, Zach; Dogic, Zvonimir; Shribak, Michael; Oldenbourg, Rudolf (American Physical Society, 2006-01-11)
      We study the liquid-crystalline phase behavior of a concentrated suspension of helical flagella isolated from Salmonella typhimurium. Flagella are prepared with different polymorphic states, some of which have a pronounced ...
    • Envelope structure of Synechococcus sp. WH8113, a nonflagellated swimming cyanobacterium 

      Samuel, Aravinthan D. T.; Petersen, Jennifer D.; Reese, Thomas S. (BioMed Central, 2001-04-24)
      Many bacteria swim by rotating helical flagellar filaments. Waterbury et al. discovered an exception, strains of the cyanobacterium Synechococcus that swim without flagella or visible changes in shape. Other species of ...
    • Environmental distribution and persistence of Quahog Parasite Unknown (QPX) 

      Gast, Rebecca J.; Moran, Dawn M.; Audemard, Corinne; Lyons, M. Maille; DeFaveri, Jacquelin; Reece, Kimberly S.; Leavitt, Dale F.; Smolowitz, Roxanna M. (Inter-Research, 2008-09-24)
      Quahog Parasite Unknown (QPX) is the cause of mass mortality events of hard clams Mercenaria mercenaria from Virginia, USA, to New Brunswick, Canada. Aquaculture areas in Massachusetts, USA, have been particularly hard ...
    • The environmental toxicant 2,3,7,8-tetrachlorodibenzo-p-dioxin disrupts morphogenesis of the rat pre-implantation embryo 

      Hutt, Karla J.; Shi, Zhanquan; Albertini, David F.; Petroff, Brian K. (BioMed Central, 2008-01-02)
      Environmental toxicants, whose actions are often mediated through the aryl hydrocarbon receptor (AhR) pathway, pose risks to the health and well-being of exposed species, including humans. Of particular concern are exposures ...
    • ENVIRONMENTS and EOL : identification of Environment Ontology terms in text and the annotation of the Encyclopedia of Life 

      Pafilis, Evangelos; Frankild, Sune P.; Schnetzer, Julia; Fanini, Lucia; Faulwetter, Sarah; Pavloudi, Christina; Vasileiadou, Katerina; Leary, Patrick R.; Hammock, Jennifer; Schulz, Katja; Parr, Cynthia Sims; Arvanitidis, Christos; Jensen, Lars Juhl (Oxford University Press, 2015-01-24)
      The association of organisms to their environments is a key issue in exploring biodiversity patterns. This knowledge has traditionally been scattered, but textual descriptions of taxa and their habitats are now being ...
    • Envisioning a marine biodiversity observation network 

      Duffy, J. Emmett; Amaral-Zettler, Linda A.; Fautin, Daphne G.; Paulay, Gustav; Rynearson, Tatiana A.; Sosik, Heidi M.; Stachowicz, John J. (University of California Press, 2013-05)
      Humans depend on diverse ocean ecosystems for food, jobs, and sustained well-being, yet many stressors threaten marine life. Extensive research has demonstrated that maintaining biodiversity promotes ocean health and service ...
    • Envisioning the future of science libraries at academic research institutions : a discussion 

      Feltes, Carol; Gibson, Donna S.; Miller, Holly; Norton, Cathy N.; Pollock, Ludmila (2012-12-20)
      A group of librarians, other information professionals, scientists and research administrators met to discuss the challenges that research libraries are currently facing. After the meeting a survey was conducted to obtain ...
    • Epigenetic regulation during mammalian oogenesis 

      Bromfield, John; Messamore, Will; Albertini, David F. (2007-09-25)
      The advent of the epigenetic era has sparked a new frontier in molecular research and the understanding of how development can be regulated beyond direct alterations of the genome. Thus far, the focal point of epigenetic ...
    • Episymbiotic microbes as food and defence for marine isopods : unique symbioses in a hostile environment 

      Lindquist, Niels; Barber, Paul H.; Weisz, Jeremy B. (Royal Society, 2005-06-14)
      Symbioses profoundly affect the diversity of life, often through novel biochemical services that symbionts provide to their hosts. These biochemical services are typically nutritional enhancements and less commonly defensive, ...
    • Epizootiology of Quahog Parasite Unknown (QPX) disease in northern quahogs (=hard clams) Mercenaria mercenaria 

      Lyons, M. Maille; Smolowitz, Roxanna M.; Gomez-Chiarri, Marta; Ward, J. Evan (National Shellfisheries Association, 2007-08)
      The economically important marine bivalve mollusc, Mercenaria mercenaria, (commonly called a northern quahog or hard clam), has endured considerable mortalities caused by a thraustochytrid pathogen called Quahog Parasite ...
    • Escherichia coli K-12 : a cooperatively developed annotation snapshot—2005 

      Riley, Monica; Abe, Takashi; Arnaud, Martha B.; Berlyn, Mary K. B.; Blattner, Frederick R.; Chaudhuri, Roy R.; Glasner, Jeremy D.; Horiuchi, Takashi; Keseler, Ingrid M.; Kosuge, Takehide; Mori, Hirotada; Perna, Nicole T.; Plunkett, Guy; Rudd, Kenneth E.; Serres, Margrethe H.; Thomas, Gavin H.; Thomson, Nicholas R.; Wishart, David; Wanner, Barry L. (Oxford University Press, 2006-01-05)
      The goal of this group project has been to coordinate and bring up-to-date information on all genes of Escherichia coli K-12. Annotation of the genome of an organism entails identification of genes, the boundaries of genes ...
    • Estimating uncertainty in ecosystem budget calculations 

      Yanai, Ruth D.; Battles, John J.; Richardson, Andrew D.; Blodgett, Corrie A.; Wood, Dustin M.; Rastetter, Edward B. (Springer, 2010-02-25)
      Ecosystem nutrient budgets often report values for pools and fluxes without any indication of uncertainty, which makes it difficult to evaluate the significance of findings or make comparisons across systems. We present ...
    • Eutrophication in Portuguese estuaries evidenced by δ15N of macrophytes 

      Castro, Paula; Valiela, Ivan; Freitas, Helena (Inter-Research, 2007-12-06)
      Terrestrial inputs of nitrogen in estuaries are increasing and altering salt marsh primary production, plant communities and associated biota. We used N isotope ratios and %N in Spartina maritima, Halimione portulacoides, ...
    • Evaluating remotely sensed phenological metrics in a dynamic ecosystem model 

      Xu, Hong; Twine, Tracy E.; Yang, Xi (MDPI AG, 2014-05-26)
      Vegetation phenology plays an important role in regulating processes of terrestrial ecosystems. Dynamic ecosystem models (DEMs) require representation of phenology to simulate the exchange of matter and energy between the ...
    • Evaluating support for the current classification of eukaryotic diversity 

      Parfrey, Laura Wegener; Barbero, Erika; Lasser, Elyse; Dunthorn, Micah; Bhattacharya, Debashish; Patterson, David J.; Katz, Laura A. (Public Library of Science (PLoS), 2006-12-22)
      Perspectives on the classification of eukaryotic diversity have changed rapidly in recent years, as the four eukaryotic groups within the five-kingdom classification—plants, animals, fungi, and protists—have been transformed ...
    • Evaluation of laser-based spectrometers for greenhouse gas flux measurements in coastal marshes 

      Brannon, Elizabeth; Moseman-Valtierra, Serena M.; Rella, Chris W.; Martin, Rose M.; Chen, Xuechu; Tang, Jianwu (John Wiley & Sons, 2016-04-18)
      Precise and rapid analyses of greenhouse gases (GHGs) will advance understanding of the net climatic forcing of coastal marsh ecosystems. We examined the ability of a cavity ring down spectroscopy (CRDS) analyzer (Model ...
    • Evaluation of pyrrolidine and pyrazolone derivatives as inhibitors of trypanosomal phosphodiesterase B1 (TbrPDEB1) 

      Amata, Emanuele; Bland, Nicholas D.; Campbell, Robert K.; Pollastri, Michael P. (2015-04-13)
      Human African trypanosomiasis (HAT) is a parasitic disease, caused by the protozoan pathogen Trypanosoma brucei, which affects thousands every year and which is in need of new therapeutics. Herein we report the synthesis ...