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
Filter
  • 2005-2009  (1)
  • 1995-1999  (5)
  • 1970-1974  (13)
  • 1935-1939  (2)
  • 1920-1924  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Electron magnetohydrodynamic turbulence (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 751-758 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron magnetohydrodynamic (EMHD) turbulence is studied in two- and three-dimensional (2D and 3D) systems. Results in 2D are particularly noteworthy. Energy dissipation rates are found to be independent of the diffusion coefficients. The energy spectrum follows a k−5/3 law for kde〉1 and k−7/3 for kde〈1, which is consistent with a local spectral energy transfer independent of the linear wave properties, contrary to magnetohydrodynamic (MHD) turbulence, where the Alfvén effect dominates the transfer dynamics. In 3D spectral properties are similar to those in 2D. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873312
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Instability of a magnetized plasma jet (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 2485-2488 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The stability characteristics of a plasma jet V(x)=sech2 x embedded in a parallel magnetic field B(x)=B0 tanh x are investigated. The Kelvin–Helmholtz kink mode, which dominates at small B0, is stabilized at B0=0.46, while the pinch mode remains unstable up to B0=0.96. Contrary to a nonmagnetized jet, for finite B0 the kink mode saturates quasilinearly by broadening the jet, such that B0/Vmax becomes larger than the marginal value 0.46. Including finite resistivity the nonlinear behavior is eventually governed by the tearing mode for all values of B0≠0, consisting of a single plasmoid moving along the jet. Hence the shear flow cannot stabilize the tearing mode, so that the apparent tearing stability of resistive current sheets observed in numerical simulations of magnetic reconnection is only due to finite-length effects. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872931
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Two-fluid theory of collisionless magnetic reconnection (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 1002-1009 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Theoretical studies of collisionless reconnection in the framework of two-fluid theory are presented. In the high-β case (β(approximately-greater-than)1) reconnection is controlled by the whistler mode, leading to decoupling of ions from electrons on scales 〈c/ωpi. Though reconnection requires electron inertia, the reconnection rate is independent thereof, controlled only by ion inertia. Reconnection is hence much faster than in the absence of the Hall term. In the opposite limit of small β the strong axial field suppresses the whistler mode. Hence ions have to follow the electrons in the narrow reconnection layer δ∼c/ωpe, forming a macroscopic current sheet which strongly reduces the reconnection rate. Theoretical scaling laws are confirmed by numerical simulations. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872211
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Randomized placebo-controlled trial of a flavonoid-rich plant extract-based cream in the treatment of rosacea (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of the European Academy of Dermatology and Venereology 19 (2005), S. 0 
    Details
    ISSN: 1468-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  Biological research suggests that vascular changes may play a major role in rosacea pathogenesis. Chrysanthellum indicum is a plant-based extract containing a unique combination of phenylpropenoic acids, flavonoids and saponosids, and has a well-documented effect on vascular wall permeability and increase of the mechanical resistance of capillaries.Objective  To determine the efficacy and safety of a cream containing 1%C. indicum extract with vitamin P properties in the treatment of rosacea.Methods  This study included 246 patients diagnosed clinically as having moderate rosacea. Patients were randomly allocated to C. indicum extract-based cream (n = 125) and placebo (n = 121) groups. Patients were advised to apply the products on their face twice a day for a 12-week period. The patients were examined at the end of each 4-week period. Severity of erythema (graded by reference to six photographs), surface of erythema and rosacea overall severity scores were recorded at each visit on days 0, 28, 56 and 84. Investigators carried out a final efficacy assessment at the end of week 12. Volunteers’ final overall efficacy assessment was recorded in a self-administered questionnaire. Adverse events were identified through examination, interview and collection of comments in patients’ questionnaires.Results  Treatment with the C. indicum extract-based cream resulted in significant improvement (P 〈 0.05) in severity of erythema, overall rosacea severity compared to baseline and placebo, and investigator and patient overall efficacy assessment scores (P = 0.046 and P = 0.001, respectively) compared with placebo scores. Adverse reactions were mild, and did not differ between the C. indicum extract-based cream and the placebo groups.Conclusion  Chrysanthellum indicum extract-based cream is an effective and well-tolerated topical agent for the treatment of moderate rosacea. The mode of action of the active ingredient suggests that additional efficacy might be expected from combination with other topical treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-3083.2005.01248.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
    A Reciprocating Laboratory Shaker (1938)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 10 (1938), S. 281-282 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50121a019
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Former Fertility of the Kalahari Desert (1924)
    [s.l.] : Nature Publishing Group
    Nature 114 (1924), S. 312-312 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PROF. J. W. GREGORY, in his article on my recent Kalahari pamphlet in NATURE of April 12, p. 539, objected to my citing the Sylphium of Cyrenaica as evidence of the former fertility of the desert. I also gave the wine palm, Raphia monbuttorum, as evidence; for, whereas it formerly lived in the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/114312b0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    facet.materialart.
    Unknown
    Zur Differenziertheit des Lösungsprozesses gesellschaftlicher Widersprüche (1974)
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 22:1 (1974) 23 
    Details
    ISSN: 0012-1045
    Topics: Philosophy
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4085-1974-022-01-000002
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Aminosäuren-zusammensetzung von epidermis-fraktionen bei meerschweinchen und haarlosen mäusen (1971)
    Springer
    Archives of dermatological research 240 (1971), S. 173-183 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Mehrere nach Extraktion mit Trichloressigsäure oder KOH erhaltene Fraktionen isolierter Epidermis von Meerschweinchen und haarlosen Mäusen wurden auf ihre Aminosäuren-Zusammensetzung und die verwandter Substanzen untersucht. Die Ergebnisse werden im Hinblick auf entsprechende Befunde insbesondere menschlicher Epidermis und Verhornungsprodukte diskutiert.
    Notes: Summary Several fractions of isolated epidermis of guinea pigs and hairless mice, obtained after extraction with trichloracetic acid or KOH respectively, were investigated for the composition of amino acids and related substances. The results are discussed with regard to similar observations, especially in human epidermis and cornified products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061630
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Freie aminosäuren und verwandte Verbindungen in der abschabbaren Hornschicht unbefallener Haut von mikrobiellen Ekzematikern und Hautgesunden (1971)
    Springer
    Archives of dermatological research 242 (1971), S. 87-96 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Freie Aminosäuren, NH3 und Urea des oberflächlichen Stratum corneum disjunctum unbefallener Haut von mikrobiellen Ekzematikern und von gesunden Kontrollpersonen wurden durch Säulenchromatographie bestimmt. Urocaninsäure wurde nach papierchromatographischer Isolierung spektrometrisch und mit Hilfe der Isotopen-Verdünnungsanalyse quantitativ erfaßt. Ferner wurden die α-Amino-N-Werte bezogen auf Hornschichtschabsel-Frischgewicht ermittelt. Die meisten der untersuchten Substanzen zeigten keine auffälligen Unterschiede zwischen den beiden Gruppen. Nur für Histidin, Glutaminsäure, allo-Isoleucin (P 〈 0,05) und Tryptophan (P 〈 0,01) waren Differenzen festzustellen. Die Ergebnisse wurden diskutiert.
    Notes: Summary Free amino acids, ammonia and urea from the superficial stratum corneum disjunctum of uninvolved skin of patients with microbiotic eczema and of healthy controls were determined by column chromatography. After separation by paper chromatography, urocanic acid was assayed spectrometrically and by use of isotope dilution analysis. Furthermore, the values for α-amino-N referring to the fresh weight of the scraped horny material were estimated. Most of the investigated substances showed no obvious changes between the two groups. Only differences were found for histidine, glutamic acid, allo-isoleucine (P 〈 0.05) and for tryptophan (P 〈 0.01). The results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00595292
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Zur aufklärung der natur „atypischer“ adenin-abbauprodukte der epidermis haarloser mäuse (1972)
    Springer
    Archives of dermatological research 245 (1972), S. 154-162 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Zwei bislang unbekannte Metaboliten von Adenin-C14, die bei Inkubation mit isolierter Epidermis entstehen, scheinen auf einerdirekten Aktion von Xanthin-Oxydase zu beruhen, da Zusätze wie Hypoxanthin (im Überschuß des Tracers) oder Allopurinol als Hemmer dieses Enzyms ihre Bildung bremsen. Der gleiche Effekt durch Zugabe von ATP basiert offenbar auf der bevorzugten Desaminierung des Adenin-Tracers via Nucleosid- bzw. Nucleotid-Formation, wodurch er dem „Nebenweg“ entzogen wird.
    Notes: Summary Two unknown metabolites of adenine-C14 seem to be produced bydirect action of xanthine oxidase in separated epidermis. Added hypoxanthine (in excess of the tracer) or allopurinol as inhibitors of this enzyme stopped its formation. The same effect was caused by added ATP. The reaction is apparently based upon prefered deamination of the tracer by forming nucleosids or nucleotids, respectively, by which it is excluded from the “by-pathway”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00584518
    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...