K M Möllmann

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Maltase, sucrase, and lactase were measured at pH 4 and pH 6 in normal and intestinalized gastric mucosa. In the normal mucosa the low activities of maltase and lactase seemed to be entirely due to lysosomal enzymes with acid pH-optimum. In intestinal metaplasia, brush border maltase and sucrase, but not lactase, appeared. On the other hand, there was a(More)
The clinical pictures of 109 patients with X-ray negative dyspepsia (XND) are described, and a comparison is made with the clinical pictures of 39 gastric ulcer patients and 61 duodenal ulcer patients. In addition it has been attempted to subdivide XND into clinically relevant subgroups by means of a Venn diagram. The XND patients were characterized by an(More)
Don’t put metal objects in the microwave’ is common safety advice. But why? Here we describe demonstration experiments involving placing household metallic objects in a microwave oven. These allow a better understanding of the interaction of microwaves with materials. Light bulbs and discharge lamps can also be used in instructive demonstrations. M This(More)
So far experiments with artificial halos from single transparent crystals have suffered from the lack of apparatus that allows simultaneous rotation around two and three axes. A new setup is presented which overcomes these restrictions by combining electrical as well as pneumatic concepts. This enables reproducible experiments of the most common halos(More)
Many physics processes underlying phenomena in atmospheric optics happen on a rather short time scale such that neither the human eye nor video cameras are able to analyze the details. We report applications of high-speed imaging of laboratory experiments in atmospheric optics with subsequent slow motion analysis. The potential to study respective transient(More)
We report the production and main optical and laser properties of (F(2)(+))(H) color centers in sulfur-doped NaCl crystals. Using a 1.06-microm Nd:YAG laser as the pump source, we realize continuous-wave and synchronously mode-locked laser operation. The laser is tunable over a remarkably large wavelength range of 1.43-2.0 microm. Output power levels are as(More)
We use coherent photon seeding to passively stabilize a synchronously mode-locked NaCl color-center laser. This results in the generation of essentially transform-limited picosecond pulses with average power levels of as high as 1.3 W in the 1.5-1.7-microm range. In addition, the pulse energy fluctuations are reduced by as much as 1 order of magnitude.
197 consecutive, non-acute, medical patients who presented with upper abdominal pain were subjected to a standard programme of investigation. The investigation represents an attempt to supplement general clinical experience with exact data. In about half the patients no cause of the pain was found and a diagnosis of X-ray negative dyspepsia was made by(More)
By using a bulk InGaAsP saturable absorber, we passively mode lock a KCl F(A)(Tl) color-center laser in a resonator configuration where the gain material is placed in a main cavity and the saturable absorber is placed in a weakly coupled external cavity. We obtain self-starting and self-stabilized resonant passive mode-locked laser operation, either with(More)