ZIB

Treffer pro Seite

Treffer 1 - 3 | 3 Treffer

Sortierung

Digitale Medien

Automatic trimming technique for multipolar magnets (1992)

Alecci, M. ; Colacicchi, S. ; Sotgiu, A. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 71 (1992), S. 3053-3055

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: The paper presents a technique for identifying and removing unwanted terms in the field power expansion of multipolar magnets. The technique is based on the measurement of the radial field at the poles of the magnet. The field terms are derived by analytical formulas and used to evaluate the current corrections. This trimming procedure has been tested for a 16-pole magnet designed for electron paramagnetic resonance imaging and permits a continuous control of the field configuration.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.350994

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Decreased collagen-induced platelet aggregation and increased platelet arginine levels in migraine: a possible link with the NO pathway (1994)

D'Andrea, G ; Cananzi, AR ; Perini, F ; [weitere]

USA/Oxford, UK : Blackwell Science Ltd

Cephalalgia 14 (1994), S. 0

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1468-2982

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Medizin

Notizen: We studied whole blood platelet aggregation induced by collagen, platelet activating factor (PAF) and measured basal platelet L-arginine (L-arg) levels, as an indirect index of the nitric oxide (NO) pathway in migraine. Migraine, both with and without aura groups, showed a reduced aggregation to collagen, but not to PAF, compared with control subjects. Platelet L-arg levels were significantly increased in migraine with aura sufferers, whereas the plasma levels were in the same range in migraineurs and controls. Platelet hyperesponsiveness to collagen stimulation in migraine may be linked to an increased availability of the amino acid precursor and an abnormal NO synthesis.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1046/j.1468-2982.1994.1405352.x

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Electron paramagnetic resonance spectrometer for three-dimensional in vivo imaging at very low frequency (1992)

Alecci, M. ; Della Penna, S. ; Sotgiu, A. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 63 (1992), S. 4263-4270

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: The paper describes an electron paramagnetic resonance apparatus for spectroscopy and imaging at very low frequency (283 MHz). The bridge operates in a reflection cavity homodyne configuration and can be used on a very broad frequency range. The sample cavity is a one loop-two gap resonator and accepts samples up to 5 cm in diameter and 10 cm long. These sample dimensions make the apparatus suitable for observing living samples such as rats. For the main field and gradients the apparatus uses a newly designed multipolar magnet that can provide the main field and gradients for 2D image reconstruction. The third gradient is obtained by coils mounted in the bore of the magnet. Tests on peroxilamine disulfonate samples have shown micromolar sensitivity. The minimum spatial resolution is limited by the sample linewidth and by the signal/noise. In living samples the toxicity of nitroxide radicals restricts the maximum label concentrations to values of the order of 10−4 M, and the resolution seems to be limited by sensitivity to fractions of cm3.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1143723

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Treffer 1 - 3 | 3 Treffer