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
    Adsorption and surface reactions of hydrogen sulfide and sulfur dioxide on copper(100) studied by electron energy loss spectroscopy (1989)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 93 (1989), S. 6164-6170 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100353a042
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Chemisorption structure of c(2×2)S/Fe(001) determined by angle-resolved photoemission extended fine structure (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 6538-6546 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: An accurate chemisorption geometry was determined for the c(2x2)S/Fe(001) system using the angle-resolved photoemission extended fine structure (ARPEFS) method, with S(1s) photoelectron peak intensities observed along [001] and [011]. Multiple-scattering spherical-wave analysis confirmed the LEED-derived fourfold hollow site geometry, and yielded perpendicular distances for S of 1.09(2) A(ring) above the first layer and 2.50(2) A(ring) above the second layer atom directly below S. The S–Fe nearest-neighbor bond length is 2.30(1) A(ring) and the M–S–M bond angle is 123(1)°. The Fe1 –Fe2 interlayer distance is contracted to 1.40(2) A(ring) and the Fe2 –Fe3 distance expanded to 1.46(3) A(ring), relative to the bulk value of 1.43 A(ring). The results are compared with similar systems and partially explained on chemical grounds. The derived structure agrees with the results of a self-consistent field (SCF) Xα spherical wave (SW) calculation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455373
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Investigation of diffusion processes in poly(ethylene oxide)/poly(methyl methacrylate) blends by laser light scattering spectroscopy (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 3160-3167 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Mutual diffusion in poly(ethylene oxide)/polymethyl methacrylate blends is investigated by using the photon correlation spectroscopic technique. The mutual diffusion coefficient and the static structural factor are measured as a function of concentration for various temperatures. The Onsager coefficient is obtained by simultaneous measurements of the diffusion coefficient and static structural factor. The result is employed to test theoretical predictions on the concentration dependence of the mutual diffusion coefficient of the polymer blend. The experiment results are found not in agreement with theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457643
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    102
Inhibition of Reactive Oxygen Species Impairs Healing in a Model of Tissue Ischemia (2005)
    Oxford, UK; Malden, USA : Blackwell Publishing Ltd/Inc.
    Wound repair and regeneration 13 (2005), S. 0 
    Details
    ISSN: 1524-475X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Reactive oxygen species (ROS) play a major role in recruiting and activating inflammatory cells, inducing angiogenesis, fibroblast proliferation, and collagen synthesis, all processes essential to wound healing. However, the same mediators have been implicated in pulmonary and hepatic fibrosis, vascular occlusion, and necrotic tissue damage. We have previously shown that hyperbaric oxygen caused a prolonged elevation of VEGF and delayed wound healing in a rat model of tissue ischemia. In this study we examine the effect of the ROS scavenger, n-acetylcysteine (NAC), on ischemic wound healing. NAC is a virtually nontoxic free radical scavenger that has been used in many experimental studies to block ROS-mediated signaling.Methods:  Male Sprague-Dawley rats underwent creation of the ischemic flap previously validated by this laboratory. This model provides two ischemic and two nonischemic excisional wounds. Rats were treated daily with HBO for 90 minutes at 2.4 atm, HBO plus 150 mg/kg NAC intraperitoneal, or control (neither HBO nor NAC). Wounds were analyzed for surface area, lactate, and VEGF.Results:  The HBO/NAC-treated animals had markedly impaired healing of their ischemic wounds at day 7 (0.105 ± .005 cm vs. 0.068 ± .002 cm for ctl and 0.064 ± .006 for HBO) and a twofold elevation of VEGF (120 pg/mg protein vs. 60 pg/mg protein). Lactate levels were not altered by NAC treatment and non-ischemic wounds showed no difference in healing, lactate, or VEGF.Conclusion:  Reactive oxygen species are required for wound healing. Our initial hypothesis was that the delay in wound closure with HBO treatment was due to excess ROS and that NAC would improve healing. The finding of elevated VEGF and delayed wound healing in the presence of a potent free radical scavenger suggests that blocking ROS signaling prevents the normal mitogenic response to VEGF. Additional studies to examine the VEGF receptor and tyrosine kinase activation will further elucidate the mechanism of ROS signaling in response to HBO treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1067-1927.2005.130216f.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Clinical profiles of vitiligo in China: an analysis of 3742 patients (2005)
    Oxford, UK : Blackwell Science Ltd
    Clinical and experimental dermatology 30 (2005), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Very few articles have aimed to illuminate the clinical profiles of vitiligo in China. We conducted this retrospective survey involving 4118 outpatients with vitiligo in order to identify the differences among various clinical types of vitiligo and their associated disorders. Completed questionnaires (3742) were validated and analysed. Of this large cohort, 1565 (41.8%) individuals presented vitiligo vulgaris, followed by focal, segmental, acrofacial, and universal, in that order. The mean age of vitiligo onset was 18.88 years. More than 60% of the patients were affected before 20 years of age. Patients with segmental vitiligo were affected earlier than those with other types of vitiligo (15.55 years; (P 〈 0.001). More than 74% of the patients presented with focal vitiligo at onset. After 3–5 years, 99% of active vitiligo was worse and shifted from one clinical type to another. However, there was no transformation between acrofacial vitiligo and segmental vitiligo. Compared with the general population, the patients with vitiligo were more likely to be affected by rheumatoid arthritis (P 〈 0.01), ichthyosis (P 〈 0.01), chronic urticaria (P 〈 0.01), or alopecia areata (P 〈 0.01).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2230.2005.01813.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Heteroepitaxial growth of Ge films on Si substrates by molecular beam epitaxy (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 2179-2181 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new approach of growing thick Ge layers on Si substrates by molecular beam epitaxy is presented. A 30–80 A(ring) thick Ge overlayer is first deposited on the Si(100) substrate at room temperature. By thermally annealing the sample to 300 or 500 °C for 10 min, the Ge atoms cluster into randomly distributed islands which would play a role in releasing the mismatch stress at the interface. The Ge film of 10 000 A(ring) thickness epitaxially grown on this surface at 550 °C shows a better crystalline quality than that grown by a conventional method. A full width at half maximum of 262 s for the Ge (400) x-ray diffraction peak has been achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100275
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Preparation of Y-Ba-Cu-O high Tc superconducting thin films by plasma-assisted organometallic chemical vapor deposition (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 194-196 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of the high Tc superconducting Y-Ba-Cu metal oxide have been prepared for the first time by plasma-assisted organometallic chemical vapor deposition using β-diketonate chelates of Y, Ba, and Cu, Y(C11H19O2)3, Ba(C11H19O2)2, and Cu(C11H19O2)2 as starting materials, followed by post-annealing under a reduced pressure of oxygen stream. X-ray diffraction spectra indicate that the films deposited on the yttria-stabilized zirconia (YSZ) substrate have a significant preferential orientation of the crystallite c axis being perpendicular to the substrate surface. Four-probe resistivity measurements reveal the temperature of the onset of superconductivity at 91.6 K and zero resistance by 78.5 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102404
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Relationship between the transition width and the zigzag wavelength (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3257-3259 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The stability of a head-to-head domain wall is analyzed and the instability is shown to have a spatial spread on the order of the zigzag wavelength. Accordingly, an idealized zigzag model is proposed and the width of a zigzag wall is related to its wavelength in the absence of an external field. For an externally applied head field the results are shown to coincide with the Williams–Comstock transition width after establishing the relationship between wavelength and head field gradient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340804
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Spin-wave instabilities and their revival by nonlinear mechanics (invited) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4147-4150 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Spin-wave instabilities in high signal power ferromagnetic resonance, first noted more than 30 years ago, have in recent years been reexamined in the light of modern dynamics. Both experiments and computer simulations have demonstrated limit cycles, period doubling, quasiperiodicity, and chaos as the rf power is progressively increased above the original threshold value. A distinctive feature of this problem is the participation of a vast number of spin-wave modes in the original instability, driving the system to a new fixed point with high excitation of an entire manifold. The next instability is a Hopf bifurcation in which a pair of collective modes grows into a limit cycle, and an accompanying spatial correlation pattern. Center manifold theory is used to establish these results. Prospects for some approximate analytic (as distinct from computational) treatment of the succession of higher bifurcations are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341129
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Chaotic motion of domain walls in soft magnetic materials (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4216-4218 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have studied numerically one-dimensional rf driven motion of domain structures. The equation of motion solved has Landau–Lifshitz damping and includes all the basic phenomenological magnetic interactions: demagnetizing field, anisotropy field, and exchange field. We have found that for a large range of parameters, the spatial average of the magnetization is chaotic in time, and the spatial pattern at fixed time itself is likewise chaotic. The power spectrum of the chaotic time series has a 1/f shape. The phase boundary between chaotic and nonchaotic motion is described, and a limited analytical insight into this problem is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338479
    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...