[Usefulness of serological examinations in the analysis of Salmonella infections in pig herds].

The development of the antibody concentration against lipopolysaccharide (LPS) of S. Typhimurium und S. Choleraesuis in rearing pigs during the fattening period and in breeding sows of the corresponding age was recorded.

[Distribution of immunoglobulin isotypes and Salmonella antibodies in blood serum and meat juice of pigs].

Using the close linear regression between the logarithm of the dilution degree of a sample and the logarithm of the extinction measured in an ELISA both the relative concentrations of immunoglobulines of the isotypes IgG, IgM and IgA and of the LPS antibodies against S. Typhimurium of the different isotypes in blood sera and meat juice of 15 slaughtered pigs were detected and compared. Furthermore the total concentration of antibodies against LPS of S.

Onset of convection in a very compressible fluid: the transient toward steady state.

We analyze the time profile deltaT(t) of the temperature difference, measured across a very compressible supercritical 3He fluid layer in its convective state. The experiments were done along the critical isochore in a Rayleigh-Bénard cell after starting the vertical constant heat flow q. For q sufficiently well above that needed for the convection onset, the transient deltaT(t) for a given epsilon identical with (T-T(c))/T(c), with T(c)=3.

[Diagnosis of bone tumors].

For the prognosis of the relatively rare bone tumours the time of neglect has an essential importance. At every suspicion of a bone tumour a systematic diagnostics which is directed to the clarification of the malignity should be carried out. The anamnesis often contains references which particularly allow an early recognition of the disease.