Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Study of the spatial distribution of backscattered electrons from a gold target with a new Monte Carlo simulation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 4706-4713 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The spatial distribution of backscattered electrons is studied for an Au target with a new Monte Carlo simulation including the discrete energy loss process. The new model is based on the Mott cross section for elastic scattering and the Vriens cross section for inelastic scattering. Some results are compared with the ones by the old Monte Carlo simulation which is based on the screened Rutherford cross section and the Bethe law. The new model results in a larger peak near the incident point and a more gradual decrease of the background part of the radial distribution. The incident energy dependence of the spatial distribution of backscattered electrons is shown for 0° and 45° incident angles. The calculated spatial distribution of low-loss backscattered electrons indicates the possibility of very high resolution even in the backscattered electron image. The exit angle dependence of the penetration depth of backscattered electrons is also studied with the new simulation. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359439
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Cryogenic Transmission Electron Microscopic Studies of Micellar Structure Correlated with Solution Viscosity on Perfluorooctyl Sufonates and Their Mixtures with a Nonionic Surfactant (1995)
    s.l. : American Chemical Society
    Langmuir 11 (1995), S. 2361-2366 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00007a008
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Special cell surface structure, and novel macromolecule transport/depolymerization system of Sphingomonas sp A1 (1999)
    Springer
    Journal of industrial microbiology and biotechnology 23 (1999), S. 425-435 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: Sphingomonas; macromolecule transport; pit; polysaccharide lyase; ABC transporter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A bacterium isolated from soil as an alginate lyase producer shows characteristic morphological and taxonomical properties consistent with being classified in the genus Sphingomonas. The bacterium utilizes high molecular weight (HMW)-alginate for growth by depolymerization of the polymer with intracellular alginate lyases, which are generated from a common precursor protein through autoregulated post-translational modifications. Electron microscopic observations of the cell surface and of thin sections of cells grown on HMW-alginate revealed dynamic changes in both cell surface and membrane structures. The most remarkable change is recognized in the formation of mouth-like pits which open and close depending on the presence or absence of HMW-alginate. Enzymatic and genetic analyses of HMW-alginate incorporation processes confirmed the presence of a pit-dependent and macromolecule-specific ABC transporter system in cells of Sphingomonas species A1. This is the first description of a bacterium with a pit on the cell surface and a pit-dependent endocytosic uptake system for macromolecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900719
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Submonolayer-Deposition of Mass-Selected Au+ and Au n + (n = 3 and 7) on HOPG and Amorphous Carbon (1998)
    Springer
    Journal of cluster science 9 (1998), S. 123-130 
    Details
    ISSN: 1572-8862
    Keywords: Gold clusters ; liquid metal ion source ; TEM ; STM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Ions of gold monomer and clusters emitted from a liquid metal ion source were mass-selected, and deposited on cleaved HOPG (highly oriented pyrolytic graphite) surfaces and on amorphous carbon thin films at room temperature with the impinging energy E i from 0 to 500 eV. The coverage of deposited ions were 1/100 and 1/1000 monolayers on HOPG surfaces and 1/3 monolayers on carbon films. Scanning tunneling microscopy of the HOPG surfaces deposited with low impinging energy (E i〈50 eV) revealed that large clusters with diameters ranging from 2 to 5 nm and height of 1–2 layers were present instead of isolated monomers and original clusters. When E i was higher than 100 eV, HOPG surfaces were damaged and only bumpy surfaces were observed by STM. Transmission electron microscopy of Au+-deposited carbon films showed the formation of clusters with diameter 0.5–20 nm, depending on the E i and the time elapsed after deposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021985815136
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    An analytical method of micropore filling of a supercritical gas (1997)
    Springer
    Adsorption 3 (1997), S. 197-208 
    Details
    ISSN: 1572-8757
    Keywords: micropore filling ; supercritical gas ; carbon micropore ; nitrogen monooxide ; methane ; molecular assembly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The supercritical gas adsorbed in the micropore having a strong molecular field was presumed to transform into the quasi-vapor to be filled in the micropore (quasi-vaporization adsorption mechanism). The Dubinin-Radushkevitch (DR) equation for micropore filling of vapor was extended to the quasi-vaporized supercritical gas using the quasi-saturated vapor pressureP 0 q and the inherent micropore volumeW L . The reason why the concepts ofP 0q andW L were introduced was explained with the molecule-pore interaction potential theory which is based on the Lennard-Jones interaction. The extended DR equation was named the supercritical DR equation. TheW L was evaluated by the Langmuir plot of the adsorption isotherm for a supercritical gas and both ofP 0q andW L provided the single reduced adsorption isotherms of supercritical NO, N2, and CH4 on activated carbon fibers and high surface area carbons were analyzed by the supercritical DR plots. The wide applicability of the reduced adsorption isotherm to these adsorption data was explicity shown. The two phase model of the organized and confined fluids was proposed in order to improve the quasi-vaporization adsorption mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01650131
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Oxidative dehydrogenation of ethane by carbon dioxide over sulfate‐modified Cr2O3/SiO2 catalysts (1999)
    Springer
    Catalysis letters 63 (1999), S. 59-64 
    Details
    ISSN: 1572-879X
    Keywords: ethane dehydrogenation ; ethylene ; CO2 ; Cr2O3 ; sulfated silica
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The oxidative dehydrogenation of ethane into ethylene by carbon dioxide over unsupported Cr2O3, Cr2O3/SiO2 and a series of Cr2O3/SiO2 catalysts modified by sulfate was investigated. The results show that Cr2O3/SiO2 is an effective catalyst for dehydrogenation of ethane and CO2 in the feed promotes the catalytic activity. Sulfation of silica will influence the catalytic behavior of Cr2O3/SiO2 in dehydrogenation of ethane with carbon dioxide depending on the amount of sulfate. Cr2O3/6 wt% SO 4 2- –SiO2 catalysts exhibit an excellent performance for this reaction, giving an ethylene yield of 55% at 67% ethane conversion at 650°C. Characterizations indicate that addition of sulfate changes the bulk and surface properties of Cr2O3/SiO2, promoting the reduction of Cr6+ to Cr3+ and favoring the catalytic conversion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019084030344
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Physiological activities of chondroitin polysulfate: the short-term effect of intravenous injection (1965)
    Springer
    Cellular and molecular life sciences 21 (1965), S. 331-333 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Chondroitin-Polysulfat führt nach intravenöser Injektion bei hyperlipämischen Kaninchen kurzfristig zu Verminderung der Turbidität und des Cholesteringehaltes im Serum und Beschleunigung der elektrophoretischen Mobilität des Serumlipoproteins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02144697
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Effects of chondroitin polysulfate on thrombus-formation and serum lipid levels (1969)
    Springer
    Cellular and molecular life sciences 25 (1969), S. 611-612 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Chondroitinpolysulfat führt nach i.v. Injektion bei Kaninchen kurzfristig zu Verlängerung der Thrombusbildungszeit und zu einer Verminderung des Thrombusgewichtes. Möglicherweise besteht eine Beziehung zwischen der Hemmung der Thrombusbildung und der reduzierenden Wirkung von Chondroitinpolysulfat auf Serum Triglyzerid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01896543
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Tritiated thymidine incorporation into aortic cells in vivo: Cell regeneration in spontaneous atherosclerosis in monkeys (1967)
    Springer
    Cellular and molecular life sciences 23 (1967), S. 732-733 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Aorta-Zellen des Saimiriäffchens zeigten H3-Thymidinaufnahme im Bereich von spontan entstandener atheromatöser Schädigung. Möglicherweise besteht eine Beziehung zwischen der Regeneration von Aorta-Zellen und der Anhäufung von Mucopolysacchariden in atheromatösen Läsionen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02154143
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Synthesis and transport of cholesterol in aortic cells: Radioisotopic studies in cell culture (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 1111-1112 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Synthese und Transport von Cholesterin in Hühner-Aortazellen wurden untersucht: 1. grösste Inkorporationsrate von C14-Acetat in der Sterin-Fraktion, 2. verminderte Aufnahme von C14-Cholesterin in Aortazellen nach ihrer Inkubation mit lipämischem Menschenserum. Der Eintritt von H3-Cholesterin in das Zytoplasma der Aortazellen von Affen wurde autoradiographisch festgestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02147788
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...