Wyniki wyszukiwania - BazTech

1

Potential sterilization methods for implantable device for therapeutic delivery

Wach R. A., Adamus-Włodarczyk A., Olejnik K. A.

Engineering of Biomaterials

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2018

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Vol. 21, no. 148

86

2

Engineering of dextran-based matrices for soft tissue regeneration

Szafulera K. J., Wach R. A., Ulański P.

Engineering of Biomaterials

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2018

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Vol. 21, no. 148

77

3

Polysaccharides hydrogel - radiation induced formation and medical applications

Wach R. A., Rosiak J. M., Ulański P.

Engineering of Biomaterials

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2017

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Vol. 20, no. 143 spec. iss.

38

4

Approach to selection of sterilization method for biodegradable polymeric medical device

Wach R. A., Mozalewska W., Olejnik A. K., Adamus A., Gallego M. R., Vange J., Bosman A. W., Mes T.

Engineering of Biomaterials

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2016

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Vol. 19, no. 138 spec. iss.

63

5

NWA 6255 meteorite − Thermophysical properties of interior and the crust

Łuszczek K., Wach R. A.

Meteorites

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2014

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Vol. 3, No. 1-2

33--44

EN

Differences in the thermophysical properties of NWA 6255 meteorite samples obtained from various locations with respect o the distance from the surface of the meteorite were evaluated by a differential scanning calorimetry (DSC). DSC is a perfect tool to experimentally verify theoretically predicted thermophysical properties of extraterrestrial matter. The specific heat capacity of the crust and the interior of meteorite were determined to be in the temperature range of 223‒823 K. Measured Cp values at room temperature for crust and for the interior of this meteorite were 602 and 668 J·kg–1·K–1, respectively. In addition, the phase transition of troilite from: (a) the fusion crust samples, (b) the edge part of the meteorite (1‒2 mm below the crust), and (c) the interior (over 10 mm below the fusion crust) was examined. It is shown that the shift of α/β transition peak of the troilite exhibits the temperature gradient evolved during atmospheric passage of a meteoroid. Moreover, the enthalpy changes of α/β transition were used to determine the troilite content in the meteorite samples (3.6 wt.%). Obtained data are in agreement with previous Leco method’s results, since NWA 6255 is relatively fresh find (W1) and troilite tends to oxidized quickly.

6

Thermophysical properties of the Sołtmany meteorite

Szurgot M., Wach R. A., Przylibski T.A.

Meteorites

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2012

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Vol. 2, No. 1-2

53--65

EN

Bulk density, porosity and thermophysical properties of the Sołtmany meteorite have been determined. The mean bulk density of the meteorite is 3.475‧103kg/m3, mean bulk density of the crust is 4.3‧103 kg/m3, grain density 3.71‧103 kg/m3, and porosity 6.4 ±} 0.4%. Mean specific heat capacity determined by DSC in temperature range between 223 and 823 K increases from 595 to 1046 J/(kg‧K), and is equal to 728 J/(kg‧K) at room temperature. Specific heat capacity of various samples is in the range 705–769 J/(kg‧K) at room temperature. Thermal capacity of Sołtmany chondrite is equal to 2.53‧106 J/(m3‧K), thermal diffusivity (1.5–1.8)‧10-6 m2/s, and thermal conductivity 3.9–4.5 W‧m–-1‧K-1at room temperature. Differential scanning calorimetry revealed two reversible phase transitions in the Sołtmany’s troilite: α/β transition at 423 K, and β/γ transition at 596.6 K.