title: [Study of the dielectric permeability in the superhigh frequency range of a degraded polyoxybutyrate biopolymer].
abstract: The dielectric permeability of the degradable biopolymer polyhydroxybutyrate synthesized by hydrogen-oxidizing bacteria Alcaligenes eutrophus was investigated by the resonance method using original highly sensitive microstrip sensors. For the first time, a linear growth of dielectric permeability (delta epsilon/delta T = 7 x 10(-4) degree-1) due to the flexibility of the polymer chain in the temperature range from 10 to 70 degrees C was revealed. The energy of a bend of the nearest fragments was evaluated (E = 392 K), and its correspondence to the energies of bends of the alcyl groups of low-molecular substances like liquid crystals was established. It was shown that at low values of dielectric permeability in the high-frequency range (epsilon' = 2.25 +/- 0.02), which are stable, in a wide range of frequencies of the electromagnetic field (1 MHz - 1 Hz), polyoxybutyrate can be used in the microwave equipment.
authors.affiliation: Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russia.
authors.forename: G A
authors.initials: GA
authors.lastname: Beliaev
authors.forename: T G
authors.initials: TG
authors.lastname: Volova
authors.forename: N A
authors.initials: NA
authors.lastname: Drokin
authors.forename: V N
authors.initials: VN
authors.lastname: Shepov
mesh_terms: D000421:Alcaligenes / Q000737:chemistry; D001704:Biopolymers / Q000737:chemistry*; D004553:Electric Conductivity; D006885:Hydroxybutyrates / Q000737:chemistry*; D011846:Radio Waves
chemical_list: D001704:Biopolymers; D006885:Hydroxybutyrates