ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

One-dimensional reactivity in catalysis studied with the scanning tunnelling microscope (1993)

Leibsle, F. M. ; Murray, P. W. ; Francis, S. M. ; [et al.]

[s.l.] : Nature Publishing Group

Nature 363 (1993), S. 706-709

add to mindlist on the mindlist

Details

ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] It is not uncommon for adsorbates to induce movement and reordering of the top layer of metal atoms, and indeed, it generally occurs for oxygen adsorption1, as this initiates bulk oxidation. A range of other adsorbates also act this way, including C (ref. 4), CO (refs 5, 6) and even hydrogen ...

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1038/363706a0

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Field calculations in the head of a newborn infant and their application to the interpretation of transcephalic impedance measurements (1981)

Murray, P. W.

Springer

Medical & biological engineering & computing 19 (1981), S. 538-546

add to mindlist on the mindlist

Details

ISSN: 1741-0444

Keywords: Brain haemorrhage ; Hydrocephalus ; Impedance plethysmography

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology , Medicine

Notes: Abstract A spherical model, of five regions, has been applied to the head of a typical premature baby for the purpose of computing the potential and current density fields, with a constant total current applied via small electrodes at opposite poles. The results have been compared within vivo transcephalic impedance measurements, and the model has been used to determine the magnitudes of the impedance effects to be expected in various clinical situations. The model predictions are found to agree well with impedance measurements as a function of the distance between the potential and current electrodes. It is calculated that a large intracranial haemorrhage would produce an increase in the transcephalic impedance of the order of 1 Ω. The model predicts a decrease of up to 20% in the impedance for a change in head circumference of 2 cm due to increased cerebrospinal fluid content. This confirms the conclusion ofReigel et al. (1977) that transcephalic impedance is a sensitive indicator of developing hydrocephalus.