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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

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2004

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tom 18

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nr 1

2

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.

International Agrophysics

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2015

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tom 29

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nr 4

3

Characterization of soil aggregate stability using low intensity ultrasonic vibrations

88%

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

International Agrophysics

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2011

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tom 25

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nr 2

4

Influence of vibration amplitude on the ultrasonic dispersion of soils

76%

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

International Agrophysics

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2002

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tom 16

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nr 1

5

Characterization of two lipopolysaccharide types isolated from Rhizobium galegae

76%

Rasanen L. A., Russa R., Urbaniak T., Choma A., Mayer H., Lindstrom K.

Acta Biochimica Polonica

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1997

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tom 44

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nr 4

Lipopolysaccharides (LPS) of Rhizobium galegae, a symbiotically nitrogen-fixing species of root-nodule bacteria, were isolated by the phenol-water method from strain HAMBI 1461, the LPS of which resembled enterobacterial smooth type LPS, and from strains HAMBI 1174 and HAMBI 1208, the LPSs of which resembled rough type LPS. The results of PAGE analysis of LPSs, Bio-Gel P2 gel filtration of polysaccharide fractions and the presence of deoxysugars and 4-O-methyl-deoxysugar both in the rough and smooth LPSs suggested that rough LPS contained a short O-antigenic polysaccharide for which we propose the name short O-chain LPS. Accordingly, the smooth LPS is called long O-chain LPS. Despite of the differences in the structure of LPS of R. galegae, all strains were equally effective in nodulating their hosts. The short O-chain LPS of R. galegae showed many features similar to those of phylogenetically related agrobacteria.

6

Immunochemical studies on R mutants of Yersinia enterocolitica O:3

76%

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

Acta Biochimica Polonica

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1998

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tom 45

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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.

Ograniczanie wyników

4 International Agrophysics

2 Acta Biochimica Polonica

6 Mayer H.

4 Mentler A.

2 Blum W. E. H.

2 Schomakers J.

1 Bartodziejska B.

1 Brade L.

1 Choma A.

1 Klik A.

1 Lindstrom K.

1 Marxer Y.

1 Ottner F.

1 Papakyriacou M.

1 Radziejewska-Lebrecht J.

1 Rampazzo N.

1 Rasanen L. A.

1 Rozalski A.

1 Russa R.

1 Shashkov A. S.

1 Skurnik M.

1 Steurer T.

1 Strauss P.

1 Urbaniak T.

1 Zehetner F.

1 2015

1 2011

1 2004

1 2002

1 1998

1 1997

Characterisation of soil aggregate stability by ultrasonic dispersion

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

Characterization of soil aggregate stability using low intensity ultrasonic vibrations

Influence of vibration amplitude on the ultrasonic dispersion of soils

Characterization of two lipopolysaccharide types isolated from Rhizobium galegae

Immunochemical studies on R mutants of Yersinia enterocolitica O:3