Reversing‐pulse electric birefringence of poly (γ‐benzyl‐<scp>L</scp>‐glutamate). II. Field‐strength dependence of steady‐state and decay signals of well‐fractionated samples

Ueda, Kazuyoshi; Mimura, Masaharu; Yamaoka, Kiwamu

doi:10.1002/bip.360230905

Cited by 7 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is that the electric field orientation mechanism can be identified by inspecting a single RPEB signal with reference to theoretical predictions.28 Serious attempts were, however, made only recntly on the quantitative interpretation of experimentally observed RPEB signals to evaluate the electrooptical and hydrodynamic properties of nonconducting helical polypeptides in solution which are polydisperse regarding their lengths. [29][30][31][32][33] In this analysis, the feature of the reverse portion in RPEB signals, i.e., the extremum (a dip or a hump) and the time required to reach it, was utilized in the low-field region, together with the steady-state birefringence and the field-free relaxation time in the decay portion measured over a wide range of field strengths.…”

Section: Introductionmentioning

confidence: 99%

Reversing-pulse electric birefringence of nonconducting helical polypeptides in solutions: detection of the effect of applied electric field on polymer conformations from the relationship between the areas of buildup, reverse, and decay signals

Yamaoka¹,

Yamamoto²,

Ueda³

1985

J. Phys. Chem.

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Reversing-pulse electric birefringence of nonconducting helical polypeptides in solutions: detection of the effect of applied electric field on polymer conformations from the relationship between the areas of buildup, reverse, and decay signals

Yamaoka¹,

Yamamoto²,

Ueda³

1985

J. Phys. Chem.

Self Cite

View full text Add to dashboard Cite

“…For rigid cylindrically symmetric molecules with a permanent dipole moment along the symmetry axis at low fields and degrees of orientation, Ueda et al 27) and O'Konski 1) have shown that Dn becomes…”

Section: Governing Equationsmentioning

confidence: 99%

Electro-optic studies of polymers of varying flexibility in solution

Nwammuo¹,

Maitland

1999

Angew. Makromol. Chem.

View full text Add to dashboard Cite

By use of rectangular and reversing pulse electric birefringence techniques, the electrical properties of polymers of intermediate degrees of flexibility were studied. The effects of chain flexibility, interactions, temperature and solvent on the electrical properties of seven selected polymers are covered. In all the cases the concentration‐field dependence is exponential. There is also considerably deviation from the Kerr law as the field is increased. The Kerr constants are measured for some systems for the first time while results for others are in good agreement with similar systems studied in the past. For fairly rigid polymers the Kerr constant variation with concentrations is of the form B ∝ Cζc where the exponent ζc is 2.0 for monodisperse poly(γ‐benzyl‐L‐glutamate) and 0.4 for polydisperse poly(n‐butyl isocyanate), respectively. For the flexible coil polymers the Kerr constants varied linearly with concentration. The other electrical properties, such as the dipole moments and the polarisability anisotropies for the systems show marked concentration and molecular weight dependence.

show abstract

Reversing‐pulse electric birefringence of poly(γ‐benzyl‐L‐glutamate). III. The temperature dependence of the transient and steady‐state behavior in cyclohexanone

1987

Self Cite

View full text Add to dashboard Cite

Higashisenda-machi, N h -k u , Hiroshima 730, Japan synopmaThe reversing-pulee electric bkfringence (WEB) technique was applied to the study of the temperature d e c t on the electrooptical and hydrodynamic properties of a fractionated [Glu(OBzl)], aample, which is molecularly dissolved in cyclohexanone. The aim was to develop a standard analytical method for thermal denaturation and temperaturc+induced confonnational traaeitiona The field-on revand steady-state signal, and the field-off decay signal, were measured at 536 nm and at a constant low field strength (a. 3 kV/m) over a wide temperature range (6-90°C). The steady-state birefringence and the relaxation time in the decay proceas were also measured at two constant temperatures (5 and 70°C) over a wide field strength range (E 5 20 kV/m). By the combination of these two differeat sets of RPEB measurements, the unwanted effect of the high pulee field on polymer confonnation at elevated temperaturea could beminimized . Together with the doneity and vhcogity of cyclohexanone measured between 5 and 96°C. the following quantitiea could be evaluated: the weight-average permanent dipole moment and polarizability anisotrOpy, the reduced optical anisotropy factor (Ag/n), the weight-average length, and the degree of polydispersity. AU t h e quantities, except for Ag/n, were found to be almoet independent of temperature (5-90°C) and concentration (1.54-427 mM).

show abstract

Reversing‐pulse electric birefringence of poly (γ‐benzyl‐L‐glutamate). II. Field‐strength dependence of steady‐state and decay signals of well‐fractionated samples

Cited by 7 publications

References 34 publications

Reversing-pulse electric birefringence of nonconducting helical polypeptides in solutions: detection of the effect of applied electric field on polymer conformations from the relationship between the areas of buildup, reverse, and decay signals

Reversing-pulse electric birefringence of nonconducting helical polypeptides in solutions: detection of the effect of applied electric field on polymer conformations from the relationship between the areas of buildup, reverse, and decay signals

Electro-optic studies of polymers of varying flexibility in solution

Reversing‐pulse electric birefringence of poly(γ‐benzyl‐L‐glutamate). III. The temperature dependence of the transient and steady‐state behavior in cyclohexanone

Contact Info

Product

Resources

About