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Enlarging skull fractures in children (1995)

Johnson, Dennis L. ; Helman, Tonya

Springer

Child's nervous system 11 (1995), S. 265-268

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ISSN: 1433-0350

Keywords: Skull fracture ; Growing fracture ; Leptomeningeal cyst ; Enlarging fracture

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract Large skull fractures are conventionally followed radiographically until healing occurs. Fractures which enlarge or remain unhealed are commonly termed “leptomeningeal cysts” or “growing skull fractures”. This study of ten children with this injury and a review of the literature shows that a true leptomeningeal cyst is seldom present and that skull fractures do not “grow”. Moreover, careful history-taking and physical examination will correctly identify all enlarging or unhealed skull fractures of childhood without the need for plain radiographs or computed tomography of the skull.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00301756

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Variation in PED response at a gold microelectrode as a function of waveform parameters when applied to alditols and carbohydrates separated by capillary electrophoresis (1995)

Roberts, Robert E. ; Johnson, Dennis C.

Weinheim : Wiley-Blackwell

Electroanalysis 7 (1995), S. 1015-1019

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ISSN: 1040-0397

Keywords: Capillary electrophoresis ; Pulsed electrochemical detection ; Alditols ; Carbohydrates ; Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Results are presented from a systematic study of the noise (N) and peak-to-noise ratio (P/N) obtained for pulsed electrochemical detection (PED) at a gold micro-wire electrode applied to a mixture of alditols and monosaccharides separated by capillary electrophoresis (CE). The electrode potentials and time periods for oxidative cleaning and reductive reactivation of the electrode were held constant in the PED waveform at minimum allowable values and the time period for digital integration of electrode current (tint) was varied from 50 to 800 ms by 50-ms intervals. The value of N was virtually independent of tint and P/N increased approximately as a linear function of tint in the range 50-200 ms corresponding to waveform frequencies in the range 4.5-2.7 Hz. A detection limit of 9 fmol glucose was determined for a 4-nL injection using tint = 200 ms.

Additional Material: 4 Ill.