Influence of Transitional Metals Doping on Conductivity of Collagen Lyophilisate and Elastin

• Authors: M. Gauza , L. Kubisz
• Languages of publication: EN

Abstracts

EN

Knowing that conductivity is a temperature function σ = f(T) allows us to estimate the thermal stability of collagen preparations from fish skin. Measurements can provide information, which is crucial for technologies applying this type of collagen. Conductivity σ measurements were performed in a constant electric field E = 1 kV/m, in the temperature range of 290-480 K. White collagen lyophilisate was used as control material. It contained neither elastin nor melanin dopants nor non-organic dopants such as gold, copper, silver or zinc. Gold, copper, silver and zinc belong to the group of transitional metals and they have intermediate properties of both alkaline metals and metals in the p block of the periodic table. The common feature of most of these elements is their ability to form coordination complexes of intense color. In the measured materials peaks were found in the temperature range of 303-323 K. Peak temperature and its shape depend on the type of material. In the case of nano-gold doping a drop in peak temperature and a decrease in conductivity were observed. The measured materials are characterized by lower thermal resistance than bovine collagen. Nevertheless, thermal stability of fish skin collagen is high enough for fish skin collagen to replace bovine collagen. The measurement results obtained for white collagen and white collagen with Zn^{2+} may indicate better bonding of free water. The presence of nano-silver and nano-copper as doping agents in graphite collagen may lead to a decrease in hygroscopy of the material and, as a result, may increase its resistance to bacteria.

Keywords

EN

72.20.-i; 72.80.Le

Discipline

• 72.80.Le: Polymers; organic compounds (including organic semiconductors)
• 72.20.-i: Conductivity phenomena in semiconductors and insulators(see also 66.70.-f Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 1A
• Pages: A-65-A-67

Dates

published

2012-01

Contributors

author

M. Gauza

• Department of Biophysics, Poznań University of Medical Sciences, A. Fredry 10, 61-701 Poznań, Poland

author

L. Kubisz

• Department of Biophysics, Poznań University of Medical Sciences, A. Fredry 10, 61-701 Poznań, Poland

References

• [1] J.E. Przybylski, K. Siemaszko-Przybylska, Patent 190737, Urząd Patentu RP, 2002
• [2] J.E. Przybylski, Patent US 7285638, B2 (2007)
• [3] M. Gauza, L. Kubisz, Acta Phys. Pol. A 118, 54 (2010)
• [4] J. Vanderschueren, J. Gasiot, Topics Appl. Phys. 37, 135 (1979)
• [5] M. Gauza, L. Kubisz, Influence of Temperature on Electrical Conductivity of Fish Skin Collagen, Some Aspects of Medical Physics - in vivo and in vitro, Eds. Z. Drzyzga, K. Ślosarek, HARD Publ. Co., Olsztyn 2010, p. 101
• [6] M. Gauza, L. Kubisz, J. Non-Cryst. Solids 357, 686 (2011)

Identifiers

DOI

10.12693/APhysPolA.121.A-65