[Study of the dielectric permeability in the superhigh frequency range of a degraded polyoxybutyrate biopolymer].

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.

[X-ray and radionuclide studies of bones and joints in psoriasis].

Radiography of the bones and joints was performed in 133 psoriatic patients; osteoscintigraphy with 99mTc-phosphate compounds was also performed in 42 of them. On the basis of x-ray findings 3 types of osteoarticular psoriasis were singled out: psoriatic polyarthritis, psoriatic polyarthrosis and psoriatic arthropathy. The most ample information on the type, activity and spreading of a pathological process in the bones and joints in psoriasis can be obtained from the combination of the x-ray and radionuclide methods.

[The x-ray semeiotics of spinal involvement in psoriasis].

X-ray examinations of the bone and joint system in psoriasis patients with pain syndromes in the limb joints have revealed spinal involvement in many cases. The authors have distinguished and described x-ray semeiotics of the inflammatory (spondylitis, spondyloarthritis, sacroiliitis), degenerative dystrophic (intervertebral osteochondrosis, spondylarthrosis deformans, spondylosis), and mixed or combined (inflammatory + degenerative dystrophic) involvements of the spine in psoriasis.