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Reactive oxygen intermediates, i.e. the superoxide radical (O*-)(2), hydrogen peroxide (H2O2) and the hydroxyl radical (*OH), are generally regarded as harmful products of oxygenic metabolism causing cell damage in plants, animals and microorganisms. However, oxygen radical chemistry may also play a useful role in polymer breakdown leading to wall loosening(More)
The use of flexible endoscopes is the standard screening method for the upper gastrointestinal tract today. Disadvantages for the patient, due to the insertion process and often applied sedation, can be overcome with wireless capsule endoscopy (WCE). But WCE is not suited for the stomach as it can not guarantee a complete screening having no active(More)
The throughput of a satellite channel communication is depending upon the link protocol. It is well known that the "classical" HOLC protocol is inadequate when applied to satellite links instead of short terrestrial links. Several modifications have been proposed to overcome this problem. The present paper gives an analysis and evaluation of a new class of(More)
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