ZIB

Electronic Resource

Gradient recalled echo MR imaging of superior sagittal sinus occlusion (1989)

Daniels, D. L. ; Czervionke, L. F. ; Hendrix, L. E. ; [et al.]

Springer

Neuroradiology 31 (1989), S. 134-136

add to mindlist on the mindlist

Details

ISSN: 1432-1920

Keywords: Gradient recalled echo ; MRI ; Sinus occlusion

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary With T1-weighted gradient recalled echo (GRE) MR images and flow compensation, we studied the superior sagittal sinus in 3 normal volunteers and 3 patients with sinus occlusion. In these images, sites of patency of the superior sagittal sinus were identified due to the high signal intensity of the normal sinus. Tumor invading the sinus was nearly isointense with cerebral gray matter. T1-weighted GRE imaging proves to be an effective technique to evaluate sinus blood flow.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00698840

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Technical factors in MR image quality (1986)

Koehler, P. R. ; Daniels, D. L. ; Williams, A. L. ; [et al.]

Springer

Neuroradiology 28 (1986), S. 74-77

add to mindlist on the mindlist

Details

ISSN: 1432-1920

Keywords: Head ; MRI ; Image quality

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary We studied the subjective rating of MR image quality as field strength, slice thickness, number of acquisitions and matrix size were varied. Matrix and number of acquisitions had the most significant effect on image quality. Therefore, in comparisons of image quality, technique must not be disregarded.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00341772

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Preparation of robust tapered restrictors for capillary supercritical fluid chromatography (1988)

Raynor, M. W. ; Bartle, K. D. ; Davies, I. L. ; [et al.]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 11 (1988), S. 289-291

add to mindlist on the mindlist

Details

ISSN: 0935-6304

Keywords: Supercritical fluid chromatography, SFC ; Capillary columns ; Restrictor ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/jhrc.1240110314

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Supercritical fluid extraction / capillary supercritical fluid chromatography / Fourier transform infrared microspectrometry of polycyclic aromatic compounds in a coal tar pitch (1988)

Raynor, M. W. ; Davies, I. L. ; Bartle, K. D. ; [et al.]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 11 (1988), S. 766-775

add to mindlist on the mindlist

Details

ISSN: 0935-6304

Keywords: Supercritical fluid extraction, SFE ; Supercritical fluid chromatography, SFC ; Fourier transform infrared microspectrometry, FTIR ; Narrow-bore capillary column ; Polycyclic aromatic compounds, PAC ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The combination of supercritical fluid extraction, high resolution capillary supercritical fluid chromatography, and Fourier transform infrared microspectrometry is described for the separation and identification of polycyclic aromatic hydrocarbons in a coal tar pitch. The variable solvating power of the supercritical fluid was utilized to selectively fractionate the sample. The fluid extract was decompressed through a frit restrictor into the sample cavity of a cooled microvalve injector, where the analytes were deposited and concentrated for subsequent chromatographic analysis. Several of the analytes separated in the chromatograph were collected on a potassium bromide disc at a solvent elimination inter-face for subsequent infrared analysis involving the use of an infra-red microscope accessory. The spectra obtained show the power of this detection technique for distinguishing between isomers.

Additional Material: 11 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/jhrc.1240111105

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Single-crystal electron-spin resonance study of the 4-phenyl-1,2,3,5-dithiadiazolyl radicalNRCC No. 30635. (1989)

Lee, F. L. ; Preston, K. F. ; Williams, A. J. ; [et al.]

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 27 (1989), S. 1161-1165

add to mindlist on the mindlist

Details

ISSN: 0749-1581

Keywords: Electron spin resonance ; Electron paramagnetic resonance ; Free radical ; π-Radical ; Heterocyclic free radical ; g Tensor ; Hyperfine interaction tensor ; Nitrogen hyperfine interaction ; Dithiadiazolyl ; Dithiadiazolylium ; Dithiadiazolium ; Unpaired electron ; Unpaired electron spin density ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Single crystals of 4-phenyl-1,2,3,5-dithiadiazolium trithiatriazinide , prepared by the reduction of S5N5+AlCl4- in SO2 with , contain a trace paramagnetic impurity which is shown by EPR spectroscopy to be the dithiadiazolyl free radical . The g and 14N hyperfine tensors of the radical were deduced from measurements made throughout three mutually orthogonal planes of crystallographically aligned specimens: g = (2.0011, 2.0075, 2.0197); 14N(2) = (37.1, 11.3, 3.4 MHz.). Within experimental error, the two nitrogen hyperfine interaction tensors are collinear and have their maximum principal value aligned parallel to gmin and perpendicular to the plane of the host cation. The results are interpreted in terms of a planar π-radical which substitutes for the planar host cation, and which has considerable unpaired spin density in N(2px) atomic orbitals directed perpendicular to the heterocyclic ring.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/mrc.1260271210

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

hits 1 - 5 | 5 hits