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8 results on '"Kresse, H."'

1. Dielectric studies of the 4-n-alkyl-4 '-thiocyanatobiphenyl (nBT) homologous series (n=2-10) in the isotropic and E phases

Author

Urban, S, Czuprynski, K, Dabrowski, R, Gestblom, B, Janik, J, Kresse, H, Schmalfuss, H, Urban, S, Czuprynski, K, Dabrowski, R, Gestblom, B, Janik, J, Kresse, H, and Schmalfuss, H

Abstract

Results of the dielectric studies of nine members of the nBT (4-n-alkyl-4-thiocyanatobiphenyl, n = 2-10) homologous series in the crystal E (E) and isotropic (I) phases are presented. The dependence of the static permittivity epsilon (s) in the isotropic, Addresses: Urban S, Jagiellonian Univ, Inst Phys, Reymonta 4, PL-30059 Krakow, Poland. Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland. Mil Tech Acad, Inst Chem, PL-00908 Warsaw, Poland. Univ Uppsala, Inst Phys, S-75121 Uppsala, Sweden. Univ Halle W

Published
2001

2. Study of high frequency relaxation processes in three substances with the -CN groups at the lateral positions

Author

Urban, S, Gestblom, B, Dabrowski, R, Dziaduszek, J, Kresse, H, Urban, S, Gestblom, B, Dabrowski, R, Dziaduszek, J, and Kresse, H

Abstract

Three liquid crystalline (LC) substances with the cyano-groups attached at the lateral positions to the molecular cores were studied with the aid of dielectric spectroscopy methods. The high frequency relaxation process connected with the molecular reorie, Addresses: Urban S, Jagiellonian Univ, Inst Phys, Reymonta 4, PL-30059 Krakow, Poland. Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland. Univ Uppsala, Inst Phys, S-75121 Uppsala, Sweden. Mil Univ Technol, Inst Chem, PL-00908 Warsaw, Poland. Univ Hall

Published
2000

6. Dielectric characterization of substituted diols

Author

Gestblom, B, Kresse, H, Tschierske, C, Urban, S, Gestblom, B, Kresse, H, Tschierske, C, and Urban, S

Abstract

Dielectric properties of four diols having different chemical structures of the hydrophobic part were determined by the time domain spectroscopy method in the frequency range from c. 15 MHz to c. 7 GHz. The static permittivity clearly reflects the changes, Addresses: JAGIELLONIAN UNIV, INST PHYS, PL-30059 KRAKOW, POLAND. UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN. UNIV HALLE WITTENBERG, DEPT CHEM, D-06108 HALLE, GERMANY.

Published
1997

7. Low-frequency dielectric relaxation in columnar hexagonal and micellar inverse cubic mesophases

Author

Kresse, H, Schmalfuss, H, Gestblom, B, Borisch, K, Tschierske, C, Kresse, H, Schmalfuss, H, Gestblom, B, Borisch, K, and Tschierske, C

Abstract

Dielectric measurements on four diols showing columnar hexagonal and micellar cubic phases were carried out. Besides the known fast local reorientation in the GHz-range, a new absorption in the MHz region was detected. This mechanism was interpreted as a, Addresses: Kresse H, UNIV HALLE WITTENBERG, INST PHYS CHEM, MUHLPFORTE 1, D-06108 HALLE, GERMANY. UNIV UPPSALA, INST PHYS, S-75121 UPPSALA, SWEDEN. UNIV HALLE WITTENBERG, INST ORGAN CHEM, D-06120 HALLE, GERMANY.

Published
1997

8. Dielectric relaxation studies of 4-n-alkyloxy-4'-cyanobiphenyls (nOCB, n=5 divided by 8)

Author

Urban, S, Gestblom, B, Kresse, H, Dabrowski, R, Urban, S, Gestblom, B, Kresse, H, and Dabrowski, R

Abstract

The results of dielectric relaxation studies of series of four n-alkyloxy cyanobiphenyl (nOCB) compounds with n ranging from 5 to 8 are presented. The complex dielectric permittivity, epsilon*(omega)=epsilon'(omega)-i'epsilon('')(omega), was measured in t, Addresses: Urban S, JAGIELLONIAN UNIV, INST PHYS, REYMONTA 4, PL-30059 KRAKOW, POLAND. UPPSALA UNIV, INST PHYS, UPPSALA, SWEDEN. UNIV HALLE WITTENBERG, INST PHYS CHEM, HALLE, GERMANY. MIL TECH ACAD, INST CHEM, WARSAW, POLAND.

Published
1996

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