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Biomedical subjects

I Szalai

Publications and source records attributed to I Szalai.

10 recordsLinked to original sources
PubMed2006

Spatial bistability: a source of complex dynamics. From spatiotemporal reaction-diffusion patterns to chemomechanical structures.

We show experimentally and theoretically that reaction systems characterized by a slow induction period followed by a fast evolution to equilibrium can readily generate "spatial bistability" when operated in thin gel reactors diffusively fed from one side. This phenomenon which corresponds to the coexistence of two different stable steady states, not breaking the symmetry of the boundary conditions, can be at the origin of diverse reaction-diffusion instabilities. Using different chemical reactions, we show how stationary pulses, labyrinthine patterns or spatiotemporal oscillations can be generated. Beyond simple reaction-diffusion instabilities, we also demonstrate that the cross coupling of spatial bistability with the size responsiveness of a chemosensitive gel can give rise to autonomous spatiotemporal shape patterns, referred to as chemomechanical structures.

Catalysis↗
PubMed2000

Comment on "Algebraic perturbation theory for polar fluids: A model for the dielectric constant"

Kalikmanov [Phys. Rev. E 59, 4085 (1999)] proposed a perturbation theory method to calculate the dielectric constant of dipolar hard sphere fluids using an infinitely long cylindrical container to avoid the depolarization. We demonstrate that while the method is very helpful, his theory appears to be incomplete because of the incorrect calculation of the corresponding three-body integrals. It is shown that with the correct consideration of these terms the theory is consistent with the results of earlier work in low-density limit, and at high densities the method yields the equation of Tani et al. [Mol. Phys. 48, 863 (1983)] for the dipolar hard sphere fluid dielectric constant.

Journal Article↗
PubMed1991

[Use of polyurethane foil for wound covering].

The authors account of the application of the Omiderm folie in connection with 29 cases. The transparent polyurethan skin substitute was used in dermatological diseases when presenting extensive shortage of tissue or for covering the half-thick skin's donor areas and for the treatment of deep second degree burns. The advantages of the application of the wound covering folie is being valued and the authors are calling attention to the most common complications being noticed during the application. The Omiderm is being judged as a suitable alternative bandage and skin substitute.

Burns↗
PubMed1990

Experiences in the Ebrimycin gel treatment of burns.

Ebrimycin gel has been used for the local treatment of burns of 50 partly hospitalized patients, partly outpatients. According to the observations the product may be successfully used by the exposure method for the treatment of superficial facial burns and by the occlusive dressing method for the treatment of small burns which are infected by Gram-positive bacteria.

Administration, Topical↗