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
    Intra- and extracerebral blood flow changes and flushing after intravenous injection of human corticotropin-releasing hormone (1994)
    Springer
    Journal of molecular medicine 72 (1994), S. 331-336 
    Details
    ISSN: 1432-1440
    Keywords: Human corticotropin-releasing hormone ; Flush-blood flow-Doppler sonography ; Medial cerebral artery ; External carotid artery ; Extracerebral blood flow ; Intracerebral blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To study facial flush after systemic administration of human corticotropin-releasing hormone (hCRH) we injected 100 μg hCRH intravenously to ten healthy young men. The increase in facial temperature was measured by infrared camera. A significant increase in facial temperature of 1.39°C ± 0.3 was found within 7 min in all patients, which lasted up to 60 min, although facial flushing was visible in only 50% (5/10) of the probands. In a second experiment 100 μg hCRH was then administered to seven other healthy young men. Intra- and extracerebral blood flow velocity changes in the medial cerebral artery (MCA) and external carotid artery (ECA) were measured after hCRH administration by use of Doppler sonography. We found a decrease of intracerebral blood flow which was caused by hyperventilation and was reversible following 6% CO2 hyperventilation during a second injection of 100 μg hCRH. Blood flow velocity in the ECA increased by 111.5 ± 32.9% (compared to baseline level), lasted up to 60 min after hCRH injection, and was not reversible by 6% end-tidal CO2 ventilation. We thus demonstrated that the direct vasodilatory effect of hCRH involves the ECA-supplied vascular territory only. The intracerebral vasoconstrictory effect represents the result of hyperventilation following hCRH injection. The data thus clearly suggest an interaction of hCRH and the vascular endothelium of the ECA, causing a marked blood flow velocity increase and facial flushing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00252822
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Solid State Processing of Bulk Metallic Glass Forming Alloys (1996)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 235-238 (Oct. 1996), p. 23-28 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/02/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.235-238.23.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Thermal Stability and Consolidation Behavior of Mechanically Alloyed Zr-Al-Cu-Ni Powders with Varying Oxygen, Iron and Tungsten Content (1998)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 269-272 (Jan. 1998), p. 767-772 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/03/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.269-272.767.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Cocaine dependence and attention switching within and between verbal and visuospatial working memory (2005)
    Oxford, UK : Blackwell Science Ltd
    European journal of neuroscience 21 (2005), S. 0 
    Details
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Many studies have shown the negative effects of cocaine on neuropsychological and cognitive performance in drug-dependent individuals, but little is known about the underlying neuroanatomy of these dysfunctions. The present study addressed attention switching between items held in working memory (WM) with a task in which subjects were required to store and update two items held in verbal or visuospatial WM. Attention-switching frequency varied between trials, thereby allowing us to isolate the switching component of task performance. Behavioural data revealed that cocaine addicts performed worse than healthy controls in all tasks. On the visuospatial task addicts performed at chance levels revealing particular impairment in visuospatial WM. On the verbal task, in which controls and users could be matched for performance, we identified attenuated responses in prefrontal and cingulate cortices and in striatal regions, while other areas such as dorsolateral prefrontal cortex did not differ between healthy controls and users. The results reveal that addiction may be accompanied by specific rather than ubiquitous hypoactivation in prefrontal and subcortical areas and suggest a compromised ability in users to control their attention to their thoughts as might be particularly relevant when required to switch away from drug-related thoughts, and thus the dysfunction in attention switching may contribute to the maintenance of addiction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-9568.2005.04027.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
    Mechanically alloyed Zr55Al10Cu30Ni5 metallic glass composites containing nanocrystalline W particles (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 7112-7119 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Composites based on the Zr55Al10Cu30Ni5 bulk metallic glass forming alloy, containing up to 17.5 vol % W particles were synthesized by mechanical alloying. Milling produces a metallic glass matrix with a homogeneous dispersion of nanoscale W particles. The composites exhibit almost the same thermal stability and no reduction of the supercooled liquid region compared to the particle-free metallic glass despite some small amount of dissolution of W into the glassy matrix. The viscosity in the supercooled liquid increases with increasing volume fraction of particles. This will be discussed with respect to the contribution of the particles as well as to changes in matrix composition and in the free volume of the material in the framework of the free volume model for viscous flow. Independent of the W content, the samples behave as moderately strong glasses. The viscous flow of the supercooled liquid is used to consolidate dense bulk samples. The Vickers hardness, HV, of the composites increases with increasing volume fraction of particles. It is suggested that both the matrix and the nanocrystalline particles contribute to the overall hardness of the composites. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370519
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Influence of oxygen on the viscosity of Zr–Al–Cu–Ni metallic glasses in the undercooled liquid region (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 3438-3440 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The viscosity of Zr–Al–Cu–Ni metallic glasses prepared as melt-spun ribbons, slowly cooled bulk samples, and mechanically alloyed powder exhibiting different oxygen contents was measured above the glass transition temperature Tg using parallel-plate rheometry. For rapidly quenched ribbons, oxygen contents ≤0.8 at. % do not drastically affect the viscosity of the glassy phase, but changes in the composition of the metallic constituents are more significant. For slowly cast samples, oxygen levels above 0.3 at. % lead to an increase in viscosity due to formation of crystalline phases. In contrast, mechanical alloying provides completely amorphous powders even for oxygen contents above 2 at. %. This allows measurement of the influence of oxygen on the viscosity of single-phase glassy alloys for high oxygen levels, revealing a significant increase in viscosity with increasing oxygen content. The viscosity in the undercooled liquid can be fitted well by a Vogel–Fulcher–Tammann (VFT) relation. Independent of their oxygen content, the samples exhibit a small VFT temperature T0 and a high melt viscosity which are characteristic of a strong glass. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367114
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    A spelling device for the paralysed (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 398 (1999), S. 297-298 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] When Jean-Dominique Bauby suffered from a cortico-subcortical stroke that led to complete paralysis with totally intact sensory and cognitive functions, he described his experience in The Diving-Bell and the Butterfly as “something like a giant invisible diving-bell holds my whole body ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/18581
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Plattenepithelkarzinom bei einer 27jährigen Patientin mit zellulärem Immundefekt (1998)
    Springer
    Mund-, Kiefer- und Gesichtschirurgie 2 (1998), S. 58-61 
    Details
    ISSN: 1434-3940
    Keywords: Schlüsselwörter Plattenepithekarzinom ; Immunglobulin-Autoantikörper ; Immundefekt ; Key words Squamous cell cancer ; Ig autoantibodies ; Immune defect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Squamous cell cancer of the oral cavity mainly occurs in older patients or in patients with alcohol or nicotine abuse. Younger patients are seldom involved. The case of a 27-year-old woman with a squamous cell cancer of the right cheek will be presented. Without any risk factors, an immune defect resulting in chronic Candida infection of the oral cavity seems to be responsible for the carcinogenesis.
    Notes: Plattenepithelkarzinome im Bereich der Mundhöhle treten meist bei älteren Patienten oder bei Patienten mit Alkohol- oder Nikotinabusus auf. Bei jüngeren Patienten werden diese selten beschrieben. Es wird über die Kasuistik einer 27jährigen Patientin mit einem Plattenepithelkarzinom im Bereich der rechten Wange berichtet. Bei fehlenden Risikofaktoren wird ein zellulärer Immundefekt und eine langjährig persistierende Candidainfektion für die Karzinogenese verantwortlich gemacht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100060050031
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Examination of steel samples, provided as reference materials, by instrumental analyses (1992)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 342 (1992), S. 312-317 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Seven steel samples considered as reference materials have been analysed by atomic emission spectrometry with inductively coupled plasma (ICP-AES), atomic absorption spectrometry with flame and graphite furnace atomization (FAAS, GFAAS), differential pulse anodic stripping voltammetry (DPASV), X-ray fluorescence analysis with total reflection sample carrier (TXRF), and instrumental neutron activation analysis (INAA). Totally, 18 elements were determined. Over 90% of all results were in good agreement with the values determined by wet analytical methods. The deviations can be explained by systematical errors for special elements in distinct methods and by statistical errors, mainly at very low concentrations because some elements, in the low ng/g region, are not homogeneously distributed in the given material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00322176
    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...