Library

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
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 116 (2002), S. 1325-1329 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Focusing and selecting the HBr–N2O cluster beam was performed by using a 2 m long electrostatic hexapole field. The observed focusing curve shows a clear evidence that the linear type HBr–N2O isomer which has symmetry of symmetric top was preferentially detected in the cluster beam formed under the experimental condition used here, even though our previous ab initio calculations predict that the bent type isomer is theoretically possible. The best fit simulation for the experimental focusing curve was achieved only if we assume vibrational excitation in the van der Waals mode of the linear type HBr–N2O. The permanent dipole moment is determined to be 0.50±0.05 D. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Allergy 58 (2003), S. 0 
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-0533
    Keywords: Multiple sclerosis ; Cerebral endothelial cell membrane ; Rhesus monkeys ; Autoimmune encephalomyelitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary It is postulated that multiple sclerosis might be an autoimmune demyelinating disease of the central nervous system (CNS). The mechanisms involved are unknown but, since the blood-brain barrier (BBB) is damaged, injury to endothelial cells is likely to have occurred. Our previous studies have led us to investigate the autoimmune effect of injuring the blood-brain barrier by immunizing rhesus monkeys with an endothelial cell membrane from the same kind of animals. The immunized animals developed a chronic or a relapsing neurological illness. Histological and ultrastructural examinations of the brain in the acute stage showed infiltrates of mononuclear cells around the blood vessels of the white matter of cerebrum, cerebellum, pons and midbrain, while in the chronic phase, large areas of demyelination and remyelination, especially in the white matter regions, were present. The animals immunized with extraneural antigen, an endothelial cell membrane obtained from human umbilical cord, developed no neurological illness. This results indicate that the brain endothelial cell membrane has an inflammatory encephalitogenic activity which could produce widespread demyelination in animals. The animal model described here may prove to be useful in the pathogenetic investigation of human autoimmune demyelinating diseases.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 71 (2000), S. 643-646 
    ISSN: 1432-0630
    Keywords: PACS: 77.66.-w; 61.46.+w; 81.15.Fg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. Size-dispersed Si nanocluster films have been synthesized by a method of crossing an Ar gas beam perpendicularly to a silicon cluster beam that is produced by a laser ablation technique. Flight directions of the nanoclusters are changed due to Ar gas collisions, and smaller nanoclusters are deflected further from the axis of the primary cluster beam. The size-dispersed nanocluster films exhibit strong red photoluminescence (PL) after exposure to the air. The PL peak energy changes between 1.42 and 1.72 eV depending on the sample position. The average diameter of the oxidized nanoclusters characterized by transmission electron microscopy is 10 nm at the position of the primary cluster beam axis and becomes smaller as deviated from the axis. The relation between the PL peak energy and the size of the oxidized Si nanoclusters is discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-0533
    Keywords: Multiple sclerosis ; Cerebral endothelial cells ; Experimental allergie encephalomyelitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Multiple sclerosis is considered to be an autoimmune demyelinating disease of the central nervous system. Damage to the blood-brain barrier, of which endothelial cells are the main constitutent, occurs in multiple sclerosis, probably due to immunological mechanisms. We report here the results of immune-mediated damage to these cells, produced by immunizing guinea pigs with an endothelial cell membrane fraction. The fraction was obtained from cerebral endothelial cells grown in vitro and was free from myelin basic protein. The immunized animals developed a chronic neurological illness with evidence of delayed hypersensitivity to the cell membrane fraction but not to myelin antigens. Histological examination of the brain in the acute stage showed mononuclear cell infiltrates aroud blood vessels, while in the chronic phase large areas of demyelination, especially in the periventricular region, were present. This bore a striking similarity to the brain in multiple sclerosis. This may prove to be a useful new animal model for the investigation of the human demyelinating disease.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...