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Your search keyword '"Pauly, S"' showing total 48 results
Start Over Author "Pauly, S" Publication Type Electronic Resources
48 results on '"Pauly, S"'

9. Influence of the Ag concentration on the medium-range order in a CuZrAlAg bulk metallic glass.

Author

Gammer, C, Gammer, C, Escher, B, Ebner, C, Minor, AM, Karnthaler, HP, Eckert, J, Pauly, S, Rentenberger, C, Gammer, C, Gammer, C, Escher, B, Ebner, C, Minor, AM, Karnthaler, HP, Eckert, J, Pauly, S, and Rentenberger, C

Abstract

Fluctuation electron microscopy of bulk metallic glasses of CuZrAl(Ag) demonstrates that medium-range order is sensitive to minor compositional changes. By analyzing nanodiffraction patterns medium-range order is detected with crystal-like motifs based on the B2 CuZr structure and its distorted structures resembling the martensitic ones. This result demonstrates some structural homology between the metallic glass and its high temperature crystalline phase. The amount of medium-range order seems slightly affected with increasing Ag concentration (0, 2, 5 at.%) but the structural motifs of the medium-range ordered clusters become more diverse at the highest Ag concentration. The decrease of dominant clusters is consistent with the destabilization of the B2 structure measured by calorimetry and accounts for the increased glass-forming ability.

Published
2017

10. Influence of the Ag concentration on the medium-range order in a CuZrAlAg bulk metallic glass.

Author

Gammer, C, Gammer, C, Escher, B, Ebner, C, Minor, AM, Karnthaler, HP, Eckert, J, Pauly, S, Rentenberger, C, Gammer, C, Gammer, C, Escher, B, Ebner, C, Minor, AM, Karnthaler, HP, Eckert, J, Pauly, S, and Rentenberger, C

Abstract

Fluctuation electron microscopy of bulk metallic glasses of CuZrAl(Ag) demonstrates that medium-range order is sensitive to minor compositional changes. By analyzing nanodiffraction patterns medium-range order is detected with crystal-like motifs based on the B2 CuZr structure and its distorted structures resembling the martensitic ones. This result demonstrates some structural homology between the metallic glass and its high temperature crystalline phase. The amount of medium-range order seems slightly affected with increasing Ag concentration (0, 2, 5 at.%) but the structural motifs of the medium-range ordered clusters become more diverse at the highest Ag concentration. The decrease of dominant clusters is consistent with the destabilization of the B2 structure measured by calorimetry and accounts for the increased glass-forming ability.

Published
2017

48. THE FLASH PATTERN OF PHOTOSYNTHETIC OXYGEN EVOLUTION AFTER TREATMENT WITH LOW CONCENTRATIONS OF HYDROXYLAMINE AS A FUNCTION OF THE PREVIOUS S1/S0-RATIO - FURTHER EVIDENCE THAT NH2OH REDUCES THE WATER OXIDIZING COMPLEX IN THE DARK

Author

Messinger, Johannes, PAULY, S, WITT, HT, Messinger, Johannes, PAULY, S, and WITT, HT

Abstract

Flash induced oxygen evolution patterns of isolated PS II complexes from the cyanobacterium Synechococcus were measured with a Joliot-type electrode. By suitable preflash and dark adaptation procedures, samples were prepared in the state S1 (100%), as well as enriched in S0 (60% S0, 40% S1). After treatment with low concentrations of NH2OH (less-than-or-equal-to 100-mu-M), the two flash patterns were identical. This is further evidence for a reduction of the water oxidizing complex by hydroxylamine in the dark. Two reduced states (S-1 and S-2) below S0 are formed by this reduction.

Published
1991

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