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
    PERFORMANCE EVALUATION FOR WASTE-WATER TREATMENT (1973)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 11 (1973), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1973.tb02973.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Fabrication of regularly arranged nanocolumns on diamond(100) using micellar masks (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 7533-7538 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cylindrical diamond columns of 15 nm height and 10 nm diameter have been prepared on a diamond(100) substrate by exploiting the self-organization of metal-loaded diblock copolymers. For this purpose, chemomechanically polished substrates of synthetic (high pressure high temperature) diamond exhibiting extremely low roughness (typical root-mean-square roughness 60 pm) were covered by a monolayer of gold-loaded inverse polystyrene-block-poly(2-vinylpyridine) micelles which self-organize in an hexagonal order on the substrate. After burning off the blockcopolymer in an oxygen plasma, the resulting Au nanoparticles act as a mask during further etching the diamond substrate in this plasma. As a result, Au-capped diamond columns are formed with an approximate size of the former gold particles. After removing the Au caps by evaporation at 1100 °C in ultrahigh vacuum, an array of diamond nanocolumns is obtained. As a consequence of this preparation process, the columns form an hexagonal lattice with a separation of 85 nm reflecting the arrangement of the self-organized micelles. The successive states of sample preparation were characterized by atomic force microscopy, Rutherford backscattering, and in situ scanning tunneling microscopy. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.373019
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Tuning the hopping conductivity of WO3 films by ion bombardment at different temperatures (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 4007-4018 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: WO3 films, either prepared by sputtering or evaporation under high or ultrahigh vacuum conditions, were irradiated with He+ and Ar+ ions (energy range 300–350 keV) at ambient and low temperatures (77–100 K). The resulting ion induced changes of the optical absorption as well as of the electrical conductivity could be determined on one and the same sample, which enables the variable range hopping (VRH) model to be tested under the assumption that the density of irradiation induced color centers is proportional to the electronic density of states contributing to the hopping conductivity. It is found that the data obtained at 300 K for He+ and Ar+ bombardment can be described within the VRH model by one common conductivity versus absorption curve, even though the effectiveness per projectile of the heavier ion for coloration as well as for increasing the conductivity is much higher. This is different at low temperatures. While the ion induced coloration is practically independent of the irradiation temperature for both projectiles, the effectiveness per projectile to enhance the conductivity is interchanged. This is attributed to the additional damage produced by the heavier ion at low temperatures resulting in strongly impeded hopping processes. Consistent with the VRH model, the temperature dependence of the conductivity of ion bombarded WO3 films follow the Mott "T−1/4" law, if the ion induced conductivity is not too high. For very high ion fluences clear deviations from the VRH model are observed for the conductivity versus absorption curves accompanied by a shift of the above power laws from T−1/4 towards T−1/2. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1380215
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The formation of chromophores through amino acid thermolysis and their possible role as prebiotic photoreceptors
    Amsterdam : Elsevier
    Biosystems 14 (1981), S. 33-40 
    Details
    ISSN: 0303-2647
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0303-2647(81)90019-8
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Molecular orientation in organic monolayers probed by UPS and MIES (metastable induced electron spectroscopy)
    Amsterdam : Elsevier
    Surface Science 319 (1994), S. 370-380 
    Details
    ISSN: 0039-6028
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0039-6028(94)90604-1
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Evidence that enviroxime targets multiple components of the rhinovirus 14 replication complex (1999)
    Springer
    Archives of virology 144 (1999), S. 1569-1585 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary.  Enviroxime and related analogs are potent inhibitors of rhinoviruses and enteroviruses in cell culture. Previous analyses of resistant mutants implicated the viral nonstructural protein 3A(B) as the likely target of drug activity. In this study, we used site-directed mutagenesis and selection of spontaneous rhinovirus 14 mutants with several enviroxime analogs to confirm the link between domains in rhinovirus 14 3A(B) and the function blocked by enviroxime. We also produced recombinant 3A and 3AB proteins for biochemical analyses. Despite extensive efforts, however, we were unable to demonstrate direct binding between enviroxime and any of several viral proteins, nor could we demonstrate binding of enviroxime to a host protein. In addition, enviroxime did not disrupt 3AB's ability to bind RNA or 3D polypeptide, the association of 3AB with membranes, or the cleavage of 3AB by 3C protease. Finally, we identified an enviroxime-resistant mutant with an increased level of resistance which apparently has mutations in multiple proteins or RNA sequences. Taken together, these results suggest that enviroxime targets a complex of proteins and/or cellular factors. Such a complex mechanism of inhibition might explain the low levels of viral resistance to these inhibitors as compared with other picornaviral inhibitors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007050050611
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Diagnostische Probleme bei Frakturen der okzipitalen Kondylen (1997)
    Springer
    Der Unfallchirurg 100 (1997), S. 100-104 
    Details
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Okzipitalkondylenfraktur ; Diagnostik ; Key words Occipital condyle fractures ; Diagnostic problems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Three cases involving fractures of the occipital condyle were recently treated by the authors. Since plain radiographs of the upper cervical spine often fail to reveal this lesion, it can be difficult to diagnose. It seems to be more common than previously suspected and described. We found one axial compression fracture and two avulsion fractures with different degrees of atlanto-occipital instability. Mandibular fracture occurred in all cases. There was no severe craniocervical trauma. The atlanto-occipital junction should always be included in the CT evaluation of facial or craniocervical trauma. Thin-section CT of the craniocervical region can best visualize this fracture and should be used when it is suspected. All cases were treated by orthotic immobilisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050099
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    The lumisphere, a new model of pre-biotic evolution (1980)
    Springer
    Naturwissenschaften 67 (1980), S. 178-181 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract Lyophilization of the amber-colored, fluorescent oils obtained via thermolysis of amino acid mixtures (Lys, Ala, Gly) leads to a cellular-structured material—with an average cell diameter of 50 μm. The cellular aggregates show a resemblance to epithel tissues. Single cellular entities find their analogs in Fox microspheres as well as in the microfossilsIsuasphaera. Short-wave UV (254 nm) irradiation of the aqueous suspensions destroys the cells, whereas suspension in saline solutions (NaCl) offers protection against dissolution by UV light. The fluorescence spectrum of the microscopic preparations containing the highly fluorescent cellular material (“lumispheres”) was registered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01086296
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Coxsackievirus-cell interactions that initiate infection in porcine ileal explants (1988)
    Springer
    Archives of virology 101 (1988), S. 35-47 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Coxsackievirus B 5 (CB 5) labeled with tritiated uridine was used to trace the interaction of the virus with explant cultures of porcine ileum. Similarly labeled human poliovirus 1 (PO 1), which is not specifically retained by porcine tissue, was used as a control. The explant procedure employed could maintain ileal tissue in a differentiated state for up to 48 hours. Porcine ileum was acquired from both young (4–6 week-old) and adult (9–11 month-old) animals. Inoculated explants of either absorptive or lymphoid tissue were incubated at temperatures selected to permit either viral adsorption or penetration and elution to occur. Retention of radioactive virus was quantitated by liquid scintillation counting and localized by autoradiography. Only in absorptive tissue explants from young animals did adsorption of CB 5 at 6°C exceed penetration at 37°C. This suggested that incubation at 6°C may not be an appropriate condition for studying enterovirus adsorption in explants. CB 5 penetrated most efficiently into lymphoid tissue explants from young animals, indicating that these tissues could discriminate between CB 5 and PO 1. In explants from adults, CB 5 penetrated equally well into lymphoid and absorptive tissues. Virus penetrated into the absorptive epithelial cells and, possibly, the lamina propria near the villous tips. Low efficiency of penetration, and the non-critical function of these target cells, may help account for the characteristic lack of gastrointestinal symptoms in enterovirus infections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01314650
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Optical properties of thin films and the Berreman effect (1985)
    Springer
    Applied physics 38 (1985), S. 263-267 
    Details
    ISSN: 1432-0630
    Keywords: 42.10 ; 42.20 ; 78.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The measurement of reflection and transmission of normally incident light to obtain the optical constants of a material is a usual tool in solid-state spectroscopy. If the material under investigation is a thin film, the interaction of the electromagnetic field with the sample can be enhanced by oblique incidence. If the light is p-polarized, structures in the reflection and transmission spectra are observed at the frequencies of transverse (TO) and longitudinal (LO) resonances. The LO structure — called the Berreman effect — is generated by the surface charges due to the normal component of the electric field. We discuss this effect for three cases: a free film, a film with a metallic back and a substrate with thin films on both sides. The dependence of the effect on the energy-loss function Im {−1/ɛ} and on the film thickness is discussed. For idealized systems simple formulae are derived and a characteristic parameter, called the Berreman thickness, is obtained. Films of this thickness show a maximum effect. Intuitive arguments are given to explain the effect. Examples for the application of the Berreman effect to characterize very thin films are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616061
    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...