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H Rickmann

Publications and source records attributed to H Rickmann.

2 recordsLinked to original sources
PubMed1990

[Data processing the the RAST laboratory].

We describe a clinical laboratory information system for the RAST laboratory based on personal computers. In developing this system, we paid special attention to easy handling which does not require any computer experience on the user's side. Data storage and retrieval are managed by a relational database system with fast data access. Aside from the usual functions of a laboratory information system, the laboratory work is facilitated by a clear distribution of samples, the possible on-line connection to various analyzers, as well as the provision of cumulative results and a fast access to archive data.

Allergens↗
PubMed1989

Subsensitivity of presynaptic adenosine A1-receptors in caudal arteries of spontaneously hypertensive rats.

(-)-N6-(R-phenylisopropyl)-adenosine (R-PIA) depressed tritium overflow and vasoconstriction evoked by electrical stimulation to a similar extent in isolated tail arteries of Wistar rats (WR) preincubated with [3H]noradrenaline. The inhibitory effects of adenosine, 5'-N-ethylcarboxamidoadenosine (NECA) and R-PIA were determined on the constrictor responses of tail arteries obtained from WR, as well as spontaneously hypertensive (SHR) and Wistar Kyoto rats (WKY). In WR and WKY, the rank order of agonist potency (R-PIA greater than NECA greater than adenosine) was compatible with the presence of adenosine A1-receptors. Whereas adenosine, NECA and R-PIA were equiactive in WR and WKY, they produced no or only slight changes in SHR. The left renal arteries of some WR were partially occluded to induce hypertension. R-PIA had the same effect in the tail arteries of these animals as in preparations obtained from sham-operated WR. The above results suggest that the subsensitivity of presynaptic A1-receptors in the blood vessels of SHR is genetically determined. This could contribute in vivo to enhanced transmitter release from terminals of perivascular nerves and subsequent increases in vascular resistance.

Adenosine↗