A marked effect of water snails on small crustaceans. [Translation from: Anz.Ost.Akad.Wiss 10, 95-99, 1952. ]

Cases of mutual exclusion of two species of organisms in nature are known in large numbers. In the majority, they make different demands on the environ- ment which makes co-occurrence impossible. Less frequent are those cases in which a definite activity of one species prevents the occurrence of the other in the same region. An experiment was carried out n order to establish if Chydorus sphaericus can co-occur with water-snails. It emerged that a substance soluble in water which is given off by snails is responsible for the negative effect on small crustacea

Mean Field Phase Diagram of SU(2)xSU(2) Lattice Higgs-Yukawa Model at Finite Lambda

The phase diagram of an SU(2)_L x SU(2)_R lattice Higgs-Yukawa model with finite lambda is constructed using mean field theory. The phase diagram bears a superficial resemblance to that for infinite lambda, however as lambda is decreased the paramagnetic region shrinks in size. For small lambda the phase transitions remain second order, and no new first order transitions are seen.Comment: 9 pages, 3 postscript figures, RevTex. To appear in PR

A BOSON EXCHANGE MODEL OF NUCLEON-NUCLEON BREMSSTRAHLUNG

Baier R, KUHNELT H, URBAN P. A BOSON EXCHANGE MODEL OF NUCLEON-NUCLEON BREMSSTRAHLUNG. ACTA PHYSICA AUSTRIACA. 1969;29(4):371-&

Effect of ingestion order of the fat component of a solid meal on intragastric fat distribution and gastric emptying assessed by MRI

PurposeTo develop an MRI technique to investigate how varying the ingestion order of nonfat and fat components of a solid meal influences three-dimensional intragastric distribution and gastric emptying (GE).Materials and methodsEight healthy subjects were studied twice in randomized order. On one occasion (condition F-NF), the fat component (40 g mayonnaise on toast) was served before the nonfat component (270 g pasta, 200 g tomato sauce, 100 mL water); on the other (condition NF-F), the ingestion order was reversed. GE and intragastric distribution of both components were assessed by MRI for 180 minutes.ResultsDuring condition F-NF, GE of fat was significantly faster than during condition NF-F (T(25) [min]: F-NF: 20 +/- 9; NF-F: 40 +/- 7; P ConclusionMeal ingestion order influences GE and intragastric distribution of fat, which can be assessed by MRI techniques, providing new insights into the physiology of gastric processing and intragastric distribution of different meal phases.Patrik Kunz, Christine Feinle-Bisset, Henryk Faas, Peter Boesiger, Michael Fried, Andreas Steingötter, Werner Schwize