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Characterisation of soil aggregate stability by ultrasonic dispersion

100%

Mentler A. , Mayer H. , Strauss P. , Blum W. E. H.

International Agrophysics

2004

tom 18

nr 1

Study of soil aggregate breakdown dynamics under low dispersive ultrasonic energies with sedimentation and X-ray attenuation

88%

Schomakers J. , Zehetner F. , Mentler A. , Ottner F. , Mayer H.

tom 29

nr 4

Characterization of soil aggregate stability using low intensity ultrasonic vibrations

88%

Schomakers J. , Mentler A. , Steurer T. , Klik A. , Mayer H.

International Agrophysics

2011

tom 25

nr 2

Influence of vibration amplitude on the ultrasonic dispersion of soils

75%

Mayer H. , Mentler A. , Papakyriacou M. , Rampazzo N. , Marxer Y. , Blum W. E. H.

International Agrophysics

2002

tom 16

nr 1

Immunochemical studies on R mutants of Yersinia enterocolitica O:3

75%

Radziejewska-Lebrecht J. , Skurnik M. , Shashkov A. S. , Brade L. , Rozalski A. , Bartodziejska B. , Mayer H.

Acta Biochimica Polonica

1998

tom 45

nr 4

Three mutants of Yersinia enterocolitica O:3, namely: YeO3-R1, YeO3-RfbR7 and YeO3-c-trs8-R were classified on the basis of sodium dodecyl sulphate/polyacrylamide gel electrophoresis (SDS/PAGE) profile of isolated lipopolysaccharides (LPS) as belonging to the Ra- (the first) and the Rc-type (the other two mutants). Methylation analysis, in addition to 13C and 1H NMR studies of purified core oligosaccharides revealed structures similar to those established previously for the full core of Y. enterocolitica O:3 in the case of the Ra mutant, and identical to that reported for the Rc mutant Ye75R, in the case of the two other mutants. The O-specific sugar, 6d-l-altrose, which forms a homopolymeric O-chain, was present in small amounts in all three LPS preparations, as well as in the core oligosaccharide preparations along with the Ra and the Rc sugars, characteristic of the Y. enterocolitica O:3 core. This result is in line with genetic data, indicating that it is the inner core region which is the receptor for the O-specific chain in Y. enterocolitica O:3. This region seems likewise to be the anchoring region for the enterobacterial common antigen (ECA), as shown by SDS/PAGE/Western blot analysis with monoclonal antibodies against ECA. In addition, we also demonstrated that the Ye75R mutant Rc and its parental strain Ye75S, both were ECA-immunogenic strains. So far, ECA-immunogenic strains, i.e. those with LPS-linked ECA, were only identified in E. coli mutants of the R1, R4 and K-12 serotype.