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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of Polysaccharide and Volatile Compounds Produced by Kefir Grains Grown in Soymilk (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : The characteristics of polysaccharides isolated from milk and soymilk kefir grains, and the composition of flavor and volatile compounds from soymilk kefir were investigated. Soymilk kefir grains revealed lower polysaccharide content than milk kefir grains, with a polysaccharide profile consisting primarily of glucose and galactose, with the former predominating. The apparent molecular weight of the polysaccharide was estimated at 1.7 × 106 Da. In comparison to nonfermented soymilk, the concentrations of the key volatile compounds for soymilk kefir (such as acetaldehyde, acetone, diacetyl, and ethanol) increased, while n-hexanal concentration decreased. The acetaldehyde level for soymilk kefir was slightly higher, but levels for the other volatile compounds were lower than for milk kefir.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb11367.x
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  • 2
    Electronic Resource
    Electronic Resource
    Phase transitions in the incoherent lattice fluctuations in YBa 2 Cu 3 O 7-δ (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 404 (2000), S. 736-740 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The growing body of experimental evidence for the existence of complex textures of charges and spins in the high-temperature superconductors has drawn attention to the so-called ‘stripe-phase’ model as a possible basis for the mechanism of superconductivity in these materials. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35008018
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  • 3
    Electronic Resource
    Electronic Resource
    Secondary ion mass spectroscopy study of Au trapping and migration in the Au-irradiated YBa2Cu3O7−δ film (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 2738-2740 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The range data and migration of Au in YBa2Cu3O7−δ film were studied with implanted 197Au (1.5 MeV 5×1015 Au+/cm2) as a tracer. The film was a c-axis oriented film, ∼750 nm thick, deposited by high-pressure planar dc sputtering on 〈100〉 LaAlO3. Analysis by secondary ion mass spectroscopy shows that the as-implanted Au concentration distribution is essentially Gaussian-like and the depth (Rˆp) of maximum Au concentration (∼1.2 wt %) is 201 nm. The projected range (R¯p) and (Rˆp) are found to be in very good agreement with the simulated data by TRIM−95, whereas the measured "straggle'' (ΔRp*) is about 20% larger than that by TRIM−95 simulation. It has also been found that the implanted 197Au starts to migrate within the film at a temperature between 650 and 700 °C, which is much higher than that for the implanted 2H (∼175 °C) and the implanted 18O (between 250 and 300 °C) in c-oriented YBa2Cu3O7−δ films. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.115582
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  • 4
    Electronic Resource
    Electronic Resource
    High-resolution transmission electron microscopy study of the radiation damage defects in high temperature superconductors (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 1968-1970 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High resolution transmission electron microscopy (HREM) reveals that MeV heavy ions like Au generate radiation damage defects, a few nanometers in size, in surface regions (about 100 A(ring)) of the superconductors. Much larger defects have been found in the deeper regions of the superconductor sample, which is believed to be due to the larger damage cascade created by the slower ions after their electronic energy loss along the track. Monte Carlo simulation (trim) shows the same result in damage size as the HREM study. Light ions, like protons, generate mostly point defects, which are not visible to current electron microscopy. These point defects, although they can pin the flux, are not ideal for flux pinning, due to their small sizes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.108332
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  • 5
    Electronic Resource
    Electronic Resource
    Smoothing of YBa2Cu3O7−δ films by ion cluster beam bombardment (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 246-248 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Smoothing high-temperature superconductor (HTS) surfaces, especially HTS thin-film surfaces, is crucial for HTS thin-film device processing. In this letter, we describe a method to planarize the surface of a YBa2Cu3O7−δ HTS film down to a smoothness with a standard deviation of 1 nm or better. The method includes first smoothing the HTS surface by ion cluster beam bombardment, followed by annealing in oxygen ambient to regrow the damaged surface layer. Additional YBCO layers can be grown epitaxially on the treated surface, even without removing the top surface layer, which contained some residual damage after annealing. This method can be integrated into HTS circuit fabrication as a key step of planarization. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120699
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  • 6
    Electronic Resource
    Electronic Resource
    Formation of boron nitride and boron carbide composite by nitrogen implantation at elevated temperature (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 1643-1645 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Boron carbide (B4C) is a wear resistant material with hardness slightly less than that of diamond. It has an excellent strength to weight ratio and relatively high toughness under controlled processing. These essential mechanical properties make B4C an ideal candidate for cutting tool and bearing applications. We will demonstrate that hexagonal boron nitride (h-BN), a good solid lubricant, can be formed on B4C surfaces through high temperature (850 °C) nitrogen ion implantation. The formation of composite B4C and h-BN on the B4C surface can potentially reduce surface friction coefficients, making the material more attractive for tribological applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110722
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  • 7
    Electronic Resource
    Electronic Resource
    Doping silver into YBa2Cu3O7−δ films by 800 keV Ag+ implantation at room temperature and elevated temperatures (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 3029-3031 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films (∼0.43 and ∼0.95 μm thick) of YBa2Cu3O7−δ on (100) LaAlO3 substrates have been implanted with 800 keV Ag+ to a dose of 5×1014/cm2, at room temperature (i.e., the total range (approximate)0.4 μm and the damage level (approximate)3.1 displacements per atom) and at elevated temperatures (450, 650, and 780 °C), followed by an in situ annealing schedule in flowing oxygen ambient. We have found that the implantation at room temperature amorphizes the implanted layer. In such a case, the implanted layer cannot regrow to the superconducting phase if there is no crystal seed remaining in the bottom of the film, whereas implantation at elevated temperatures plus an in situ annealing schedule, including a step at 870 °C in flowing oxygen ambient, can maintain the crystal structure and superconductivity of the films. For the thicker film, we have found that after the implantation at 450 or 650 °C and the in situ annealing, the total volume of the film has recovered to the superconducting 123 phase with a Tc=89 K. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118739
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  • 8
    Electronic Resource
    Electronic Resource
    Wake effects on charged particle stopping in solids
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 16 (1986), S. 317-320 
    Details
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-583X(86)90090-X
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  • 9
    Electronic Resource
    Electronic Resource
    Improvement of the catharanthine productivity in hairy root cultures ofCatharanthus roseus by using monosaccharides as a carbon source (1992)
    Springer
    Biotechnology letters 14 (1992), S. 695-700 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Sucrose, glucose, and fructose as carbon sources in culture medium were assessed in hairy root cultures ofCatharanthus roseus. The cultures preferentially consumed sucrose, resulting in about 40% (dry wt) higher growth rate. However, fructose enhanced the cathranthine yield about two-fold. The elevated yield was not seemingly ascribed to the higher osmolarity per unit weight of fructose than sucrose. A two stage culture using sucrose (1st) and fructose (2nd) improved volumetric yields of catharanthine about two-fold, i.e. 41 mg/l.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021645
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  • 10
    Electronic Resource
    Electronic Resource
    Molecular cloning and characterization of two novel isoforms of the small subunit of ADPglucose pyrophosphorylase from sweet potato (1997)
    Springer
    Molecular genetics and genomics 254 (1997), S. 179-185 
    Details
    ISSN: 1617-4623
    Keywords: Key words ADPglucose pyrophosphorylase  ;   Sweet potato Ipomoea batatas cv. White Star  ;   Starch synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two cDNA clones encoding two different ADPglucose pyrophosphorylase (AGPase) polypeptides designated IbAGP–sTL1 (sTL1) and IbAGP-sTL2 (sTL2) were isolated from sweet potato tuberous root and leaf libraries. The two are 84.1% and 90.6% identical at the nucleotide and amino acid sequence level, respectively. They showed higher homology with previously identified small AGPase subunit polypeptides than with large subunits, indicating that they belong to the class of small AGPase subunit polypeptides. Although both isoforms were expressed in the same organs of sweet potato, including tuberous root, leaf and stem tissues, the steady-state level of sTL1 transcripts was always higher than that of sTL2. Throughout the various developmental stages of leaves examined both isoforms were actively expressed and no significant changes in mRNA level were detected. In leaves, the level of sTL1 mRNA was increased enormously by treatment with exogenous sucrose and moderately by growth under constant light, whereas the transcript level of sTL2 remained almost unaffected, indicating that sTL1 but not sTL2 is a sucrose-inducible and light-responsive gene of starch biosynthesis. sTL1 is the only sucrose-inducible gene encoding a small AGPase subunit so far characterized from higher plants. Genomic Southern analysis suggests that the two isoforms originate from different loci in the sweet potato genome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380050406
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