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  • 1
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    Sustained Swimming in Dolphins (1961)
    American Association for the Advancement of Science
    Details
    Publication Date: 1961-03-24
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Anaerobic degradation of cyclohexane-1,2-diol by a new Azoarcus species (1997)
    Springer
    Archives of microbiology 168 (1997), S. 199-204 
    Details
    ISSN: 1432-072X
    Keywords: Key wordsAzoarcus ; Diol dehydratase ; Acetoin ; dehydrogenase ; Carbon ; carbon hydrolase ; Denitrification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A bacterium, strain 22Lin, was isolated on cyclohexane-1,2-diol as sole electron donor and carbon source and nitrate as electron acceptor. Cells are motile rods and are facultatively anaerobic. A phylogenetic comparison based on the total 16S rRNA gene sequence allowed the assignment of the isolate to the genus Azoarcus. Cyclohexanol, cyclohexanone, cyclohexane-1,3-diol, and cyclohexane-1,3-dione, which are oxidized by a different denitrifying strain, did not support denitrifying growth of isolate 22Lin. On the contrary, cyclohexanol (I50 = 37 μM) and cyclohexanone (I50 = 28 μM) inhibited growth on cyclohexane-1,2-diol, but not on acetate. NAD was reduced by crude extracts of strain 22Lin in the presence of cyclohexane-1,2-dione, but not in the presence of cyclohexanone or cyclohexane-1,3-dione. The formation of 6-oxohexanoate from cyclohexane-1,2-dione and of adipate during NAD reduction suggests that strain 22Lin possesses a carbon–carbon hydrolase that transforms cyclohexane-1,2-dione into 6-oxohexanoate. This pathway was once observed in an aerobic pseudomonad that was lost and could not be reisolated. Here, the application of strictly anoxic enrichment conditions enabled the reisolation of another strain (22Lin) that uses this pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050488
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  • 3
    Electronic Resource
    Electronic Resource
    Anaerobic oxidation of alkanes by newly isolated denitrifying bacteria (2000)
    Springer
    Archives of microbiology 173 (2000), S. 58-64 
    Details
    ISSN: 1432-072X
    Keywords: Key wordsn-Alkanes ; Anaerobic hydrocarbon ¶oxidation ; Denitrifying bacteria ; Isolation ; Degradation ¶balance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The capacity of denitrifying bacteria for anaerobic utilization of saturated hydrocarbons (alkanes) was investigated with n-alkanes of various chain lengths and with crude oil in enrichment cultures containing nitrate as electron acceptor. Three distinct types of denitrifying bacteria were isolated in pure culture. A strain (HxN1) with oval-shaped, nonmotile cells originated from a denitrifying enrichment culture with crude oil and was isolated with n-hexane (C6H14). Another strain (OcN1) with slender, rod-shaped, motile cells was isolated from an enrichment culture with n-octane (C8H18). A third strain (HdN1) with oval, somewhat pleomorphic, partly motile cells originated from an enrichment culture with aliphatic mineral oil and was isolated with n-hexadecane (C16H34). Cells of hexane-utilizing strain HxN1 grew homogeneously in the growth medium and did not adhere to the alkane phase, in contrast to the two other strains. Quantification of substrate consumption and cell growth revealed the capacity for complete oxidation of alkanes under strictly anoxic conditions, with nitrate being reduced to dinitrogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050008
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  • 4
    Electronic Resource
    Electronic Resource
    Anaerobic mineralization of cholesterol by a novel type of denitrifying bacterium (1997)
    Springer
    Archives of microbiology 167 (1997), S. 269-274 
    Details
    ISSN: 1432-072X
    Keywords: Key words Anaerobic bacteria ; Nitrate reduction ; Steroids ; Hydrocarbon ; Anaerobic degradation ; Azoarcus ; Thauera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A novel denitrifying bacterium, strain 72Chol, was enriched and isolated under strictly anoxic conditions on cholesterol as sole electron donor and carbon source. Strain 72Chol grew on cholesterol with oxygen or nitrate as electron acceptor. Strictly anaerobic growth in the absence of oxygen was demonstrated using chemically reduced culture media. During anaerobic growth, nitrate was initially reduced to nitrite. At low nitrate concentrations, nitrite was further reduced to nitrogen gas. Ammonia was assimilated. The degradation balance measured in cholesterol-limited cultures and the amounts of carbon dioxide, nitrite, and nitrogen gas formed during the microbial process indicated a complete oxidation of cholesterol to carbon dioxide. A phylogenetic comparison based on total 16S rDNA sequence analysis indicated that the isolated micro-organism, strain 72Chol, belongs to the β2-subgroup in the Proteobacteria and is related to Rhodocyclus, Thauera, and Azoarcus species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050442
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  • 5
    Electronic Resource
    Electronic Resource
    Carbon-Nanofiber Reinforced Cu Composites Prepared by Powder Metallurgy for Thermal Management of Electronic Devices (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 534-536 (Jan. 2007), p. 853-856 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Electronic packaging involves interconnecting, powering, protecting, and cooling ofsemiconductor circuits for the use in a variety of microelectronic applications. For microelectroniccircuits, the main type of failure is thermal fatigue, owing to the different thermal expansioncoefficients of semiconductor chips and packaging materials. Therefore, the search for matchedcoefficients of thermal expansion (CTE) of packaging materials in combination with a high thermalconductivity is the main task for developments of heat sink materials electronics, and goodmechanical properties are also required.The aim of this work is to develop copper matrix composites reinforced with carbon nanofibers.The advantages of carbon nanofibers, especially the good thermal conductivity, are utlized to obtaina composite material having a thermal conductivity higher than 400W/mK.The main challenge is to obtain a homogeneous dispersion of carbon nanofibers in copper. Inthis paper, a technology for obtaining a homogeneous mixture of copper and nanofibers will bepresented and the microstructure and properties of consolidated samples will be discussed.In order to improve the bonding strength between copper and nanofibers, different alloyingelements were added. The microstructure and the properties will be presented and the influence ofinterface modification will be discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.534-536.853.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Bilayer-gel membranes. Formation and some properties
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 512 (1978), S. 377-387 
    Details
    ISSN: 0005-2736
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2736(78)90261-4
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  • 7
    Electronic Resource
    Electronic Resource
    A peptide antibiotic from human skin (1997)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 387 (1997), S. 861-861 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To avoid opportunistic infections, plants and animals have developed antimicrobial peptides in their epithelia that can form pores in the cytoplasmic membrane of microorganisms. After contact with microorganisms, vertebrate skin, trachea and tongue epithelia are rich sources of peptide ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/387861a0
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  • 8
    Electronic Resource
    Electronic Resource
    Optimization of x-ray sources for proximity lithography produced by a high average power Nd:glass laser (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 8258-8268 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We measured the conversion efficiency of laser pulse energy into keV x rays from a variety of solid planar targets and a Xe gas puff target irradiated using a high average power Nd:glass slab laser capable of delivering 13 ns full width at half-maximum pulses at up to 20 J at 1.053 μm and 12 J at 0.53 μm. Targets were chosen to optimize emission in the 10–15 A(ring) wavelength band, including L-shell emission from materials with atomic numbers in the range Z=24–30 and M-shell emission from Xe (Z=54). With 1.053 μm a maximum conversion of 11% into 2π sr was measured from solid Xe targets. At 0.527 μm efficiencies of 12%–18%/(2π sr) were measured for all of the solid targets in the same wavelength band. The x-ray conversion efficiency from the Xe gas puff target was considerably lower, at about 3%/(2π sr) when irradiated with 1.053 μm. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362701
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  • 9
    Electronic Resource
    Electronic Resource
    X-ray lasers for high density plasma diagnostics (invited) : Proceedings of the tenth topical conference on high temperature plasma diagnostics (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 574-578 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Collisionally pumped soft x-ray lasers now operate over a wavelength range extending from 35 to 300 A(ring). These well-characterized sources have high peak brightness (GeV blackbody temperature) and narrow bandwidth making them ideal for x-ray imaging and interferometry. We will describe experiments which have used the yttrium neon-like x-ray laser operating at 155 A(ring) to probe plasmas at electron densities exceeding 4×1021 cm−3. The short pulse duration of this x-ray laser (∼150 ps) has made it possible to image directly driven thin foils with 1–2 μm spatial resolution. Advances in multilayer mirrors and beam splitters have now also made it possible to develop x-ray laser interferometers. We will describe initial experiments to probe plasmas relevant to ICF using x-ray laser interferometry. The progress in the development of short pulse x-ray lasers (∼30 ps) which are ultimately necessary to extend x-ray laser diagnostic techniques to higher densities will also be presented. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146289
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  • 10
    Electronic Resource
    Electronic Resource
    High-count-rate operation of a TFTR position-sensitive x-ray detector with delay-line readouts : Eighth topical conference on high—temperature plasma diagnostics (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 2771-2773 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: X-ray spectra obtained with position-sensitive detectors which use delay-line readout systems are subject to distortions at count rates comparable to the inverse of the temporal length of the delay line. These distortions are due to the simultaneous existence of pulses from different photons on the delay line. High incident rates up to several MHz can be obtained on the detectors of the TFTR crystal spectrometer under certain conditions. This paper describes improvements which can be obtained by an interarrival time discriminator circuit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141826
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