Zobrazeno 1 - 10
of 54
pro vyhledávání: '"A I Tsapin"'
Publikováno v:
The Journal of Supercritical Fluids. 106:100-104
Silica aerogels were investigated to determine the relationship of density, surface area, and the concentration of molecular absorption bonding sites. Aerogel surface areas were measured, by Brunauer–Emmett–Teller (BET), for densities ranging fro
Publikováno v:
Icarus. 226:1-9
Due to its extremely high porosity and the nanoscale filaments that make up its structure, aerogel is an excellent material for the capture of hypervelocity, micron-sized particles. A great deal of the kinetic energy of a particle is converted to the
Publikováno v:
Icarus. 225:636-642
Thermal volatilization or pyrolysis of solid samples followed by gas chromatography–mass spectrometry (TV–GC–MS) or other downstream analyses has proven robustness and has been adopted for the extraction of organic compounds for their detection
Publikováno v:
Icarus. 187:584-591
We report the rates of decomposition by ultraviolet (UV) photolysis of four amino acids in millimeter-thick crystalline water ice matrices at 100 K to constrain the survivability of these important organic molecules within ice lying near the surfaces
Autor:
John C. Priscu, A. I. Tsapin, Brent C. Christner, Michael Studinger, W. Berry Lyons, Kathleen A. Welch, G Royston-Bishop, Christine M. Foreman, Martyn Tranter, Brianna R. Arnold
Publikováno v:
Limnology and Oceanography. 51:2485-2501
Subglacial Lake Vostok is located ,4 km beneath the surface of the East Antarctic Ice Sheet and has been isolated from the atmosphere for .15 million yr. Concerns for environmental protection have prevented direct sampling of the lake water thus far.
Publikováno v:
Symposium - International Astronomical Union. 213:309-314
The search for extraterrestrial habitable planets will require long observation times and the intelligent selection of appropriate parent stars and target biosignatures. While life can certainly develop in the absence of photosynthesis, such life for
Publikováno v:
Environmental Microbiology. 5:321-326
We report the isolation and properties of several species of bacteria from Siberian permafrost. Half of the isolates were spore-forming bacteria unable to grow or metabolize at subzero temperatures. Other Gram-positive isolates metabolized, but never
Publikováno v:
International Microbiology. 5:223-230
The search for life, on and off our planet, can be done by conventional methods with which we are all familiar. These methods are sensitive and specific, and are often capable of detecting even single cells. However, if the search broadens to include
Autor:
Jonathan A. Eisen, Jeremy Peterson, J. Craig Venter, Robert J. Dodson, Timothy D. Read, William C. Nelson, Lowell Umayam, John Gill, James Scott, Janice Weidman, K. Lee, T. Utterback, Kenneth H. Nealson, Robert T. DeBoy, Terry E. Meyer, Tamara Feldblyum, Lisa McDonald, Lauren M. Brinkac, Eric Gaidos, A. Scott Durkin, Claire M. Fraser, Kristy Berry, Sean C. Daugherty, Owen White, Karen E. Nelson, Hamilton O. Smith, Alex M. Wolf, Ian T. Paulsen, Hoda Khouri, Marjorie Impraim, Rekha Seshadri, John F. Heidelberg, A. I. Tsapin, Rebecca A. Clayton, Chris Lee, Daniel H. Haft, Jessica Vamathevan, Naomi L. Ward, Ramana Madupu, Barbara A. Methé, Maureen J. Beanan, James F. Kolonay, Jacob L. Mueller
Publikováno v:
Nature Biotechnology. 20:1118-1123
Shewanella oneidensis is an important model organism for bioremediation studies because of its diverse respiratory capabilities, conferred in part by multicomponent, branched electron transport systems. Here we report the sequencing of the S. oneiden
Autor:
Isabel Vandenberghe, E. Harada, J. Van Beeumen, T. Kaizu, David Leys, A. I. Tsapin, Hideo Akutsu, Kenneth H. Nealson, Terrance E. Meyer, Michael A. Cusanovich, James H. Scott
Publikováno v:
Applied and Environmental Microbiology. 67:3236-3244
Two abundant, low-redox-potential cytochromes c were purified from the facultative anaerobe Shewanella oneidensis strain MR1 grown anaerobically with fumarate. The small cytochrome was completely sequenced, and the genes coding for both proteins were