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Plasma and right auricle concentrations of atrial natriuretic polypeptide in children with cardiac diseases (1988)

Akimoto, K. ; Miyata, A. ; Kangawa, K. ; [et al.]

Springer

European journal of pediatrics 147 (1988), S. 485-489

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ISSN: 1432-1076

Keywords: Atrial natriuretic polypeptide ; Cardiac disease

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract To investigate the atrial natriuretic polypeptide (ANP) levels in congenital heart diseases, we measured plasma immunoreactive ANP (ir-ANP) in 29 patients with left-to-righ shunt, and right auricle ir-ANP in 25 patients who underwent operation. The levels of ir-ANP in the pulmonary artery correlated with that in the femoral vein (r=0.95, P〈0.001), mean pulmonary arterial pressure (r=0.74, P〈0.001) and right atrial pressure (r=0.53, P〈0.01). The right auricle ir-ANP level was high in patients with heart failure combined with pressure or volume overload of the right atrium, as observed in tricuspid atresia, complete endocardial cushion defect, and total anomalous pulmonary venous drainage. These results suggest that the production of ANP in the atrium increases as a compensatory or secondary response to persistent release of ANP into the circulation in cardiac diseases.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00441972

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Optically synaptic films using spiropyran J-aggregates (1995)

Miyata, A. ; Matsushima, T. ; Ohki, H. ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Advanced Materials for Optics and Electronics 5 (1995), S. 37-43

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ISSN: 1057-9257

Keywords: Spiropyran ; J-aggregates ; H-aggregates ; LB film ; non-linear photochromism logic ‘AND’ function ; optical neural network system ; Hopfield model ; Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Electrical Engineering, Measurement and Control Technology , Physics

Notes: Spiropyran SP1822 J-aggregate LB films show a non-linear photochromic response with a threshold against the incident light intensity of a CW dye laser. Using two laser beams operating below the threshold level intensity, the logic ‘AND’ function was found to be optically stored as an overlapping region of two incident patterns. We proposed the adoption of an LB film of spiropyran J-aggregates to store the memory matrix Tijkl as an overlapping region of learning input pattern Vij and multi-image input pattern Vkl in order to construct an optical neural network system based on Hopfield model.

Additional Material: 10 Ill.