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Digitale Medien

Auditory brainstem response in neonates with asphyxia and intracranial haemorrhage (1986)

Yasuhara, A. ; Kinoshita, Y. ; Hori, A. ; [weitere]

Springer

European journal of pediatrics 145 (1986), S. 347-350

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ISSN: 1432-1076

Schlagwort(e): Auditory brainstem response ; Newborn ; Intracranial haemorrhage ; Neonatal asphyxia

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Abstract Auditory brainstem response (ABR) was used to assess possible brainstem damage in 76 neonates with asphyxia and intracranial haemorrhage (ICH). Fifty-eight neonates had ICH, 52 had neonatal asphyxia and 34 of these patients had both. Eighty-nine percent of the patients with neonatal asphyxia showed some abnormal patterns in response, the major one being an increase in the threshold of wave V. In the ICH group, abnormal patterns were observed in 62.5%, among whom the prolongation of the I–V interpeak latency (IPL) and of wave V latency was seen more frequently than the increase of threshold of wave V. In the case of neonatal asphyxia associated with ICH, both the prolongation of the latency and the increase of threshold were observed equally. These abnormalities of ABR were associated with worsening clinical condition and conversely normalized gradually following the improvement of the underlying disease. Especially the I–V IPL, wave V latency and the threshold of wave V could serve as indicators of the treatment.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00439236

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Digitale Medien

Electrical properties of poly(bis(β-phenoxyethoxy)phosphazene) and its complexes (1988)

Ohara, K. ; Matsuzawa, S. ; Kobayashi, Y.

Springer

Colloid & polymer science 266 (1988), S. 1079-1086

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ISSN: 1435-1536

Schlagwort(e): Poly(bis(β-phenoxyethoxy)phosphazene) ; Ag-complex ; dc andacconductivity ; dielectriclosstangent ; temperature andfrequencydependence

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Maschinenbau

Notizen: Abstract Electrical and dielectrical properties of poly(bis(β-phenoxyethoxy)phosphazene) (I) and its complexes with various content ratios of AgSO3CF3 to monomeric unit (0.25/1 (II) and 0.5/1 (III) in molar ratio) were investigated.Dc conductivity of respective samples at 18 °C were 6.1×10−12, 4.4×10−9, and 7.1×10−8 S/m.Dc conduction was considered to be due to ion hopping. Charge mobility ranged from 3×10−12 to 6× 10−11 m2/Vs depending on the applied field in sample II. In sample I, a tanδ peak was found which can be ascribed to molecular relaxation of main chains. The peak vanished upon introducing AgSO3 CF3. Temperature dependence of total conductivity (σ T ) measured byac method in the temperature range between −150 °C and 50 °C showed several peaks at the temperatures corresponding to the peak temperatures of tanδ. Total conductivities of respective samples at 100 kHz were 4.9×10−7 (69 °C), 1.7×10−4 (45 °C), and 1.5×10−4(40°C)S/m.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01414397

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