polymers may improve their mechanical behaviour (stiffness [ 3 – 6 ], failure resistance [ 7 , 8 ] and dimensional stability [ 6 , 9 , 10 ]), their gas and solvents barrier properties [ 11 – 13 ] and their thermal degradation and chemical resistance [ 6
Authors:Eszter Vozáry, Kinga Ignácz, and Bíborka Gillay
approached with an electrical circuit model consisting of serial connection of a resistance and two distributed elements ( Grimnes and Martinsen, 2008 ): (1) R 0 + R 1 1 + ( i ω τ 1 ) ψ 1 + R 2 1 + ( i ω τ 2 ) ψ 2 , where R 0 , R 1 and R 2 are
Authors:N. M. Rendtorff, L. B. Garrido, and E. F. Aglietti
variables [ 34 ]. This provides some physical property selection capability for engineering applications.
One of the limiting behaviors of several Zirconia containing materials is the thermal shock resistance. This behavior is strongly related to the
method suffers other discrepancies because of the interference of the thermal contact resistance caused by having to use multi-layer stacking samples and the associated residual local natural convection.
In this article, the authors developed a
The most current in vitro and in vivo results in the BioArena system and under greenhouse conditions provide a good opportunity for a fundamental renewal of biological detections and interactions in layer liquid chromatography. The adsorbent bed in a column liquid arrangement is not suitable for biological detection because the living cells do not grow there. Contrarily, the planar adsorbent layer enables the in situ biodetection of antimicrobials and the interactions among separated compounds, cells, and further various cofactors (molecules), making the study of mechanisms of action possible. The basic elements of the time- and dose-dependent quadruple immune response of plants to pathogens in relation to the function and reactions of formaldehyde and its reaction products (mainly endogenous ozone) were demonstrated. This finding opens a new horizon in the field of disease resistance in plants and perhaps in general in the biological world. These results give a good basis and possibility for studying and understanding the unique high-dilution phenomena as well, and at that time, they promise the elimination of century contradictions in this field.
Authors:D. Stawski, S. Rabiej, L. Herczyńska, and Z. Draczyński
In this work the thermal properties of chitins of different origin were compared using a thermogravimetric technique. The
αs-αr method, which makes possible a comparison of the thermal resistances of materials with similar thermostability, was used.
The basic range of thermal conversion was determined. In this range, the thermal resistance depends on the chitin origin.
The value of activation energy was calculated. No influence on the average molecular mass, crystallinity and the degree of
acetylation on the thermal resistance was observed. On the other hand, it was found that the thermal stability depends on
the size and perfection of crystallites as well as on the crystalline form of the chitin.
Authors:M. Drábik, L. Gáliková, K. Varshney, and M. Quraishi
The applicability of MDF synthesis procedure, the coincidence of the interfacial cross-linking and the moisture resistance
of MDF-related mixes based on two industrial Portland cements (CEM I, CEM II) and poly-P are reported. The knowledge of the
moisture resistance of synthesized material is of paramount importance; two independent experimental methods confirmed that
the moisture resistance of MDF cements based on CEM I (or CEM II) with 5% of poly-P achieves sufficient levels at 50% RH and
at ambient values of RH. The results of thermal analysis are directly related to the former knowledge on the appearance and
role of cross-links in the interfacial zone of MDF cements.
Authors:I. Blanco, L. Abate, F. A. Bottino, and P. Bottino
the results over reported.
Some considerations are possible on the results obtained: the initial decomposition temperatures of our hib-POSSs in flowing nitrogen were higher than those in static air atmosphere, thus meaning lower resistance to
Four types of membrane filter have been studied with respect to trace element contamination and resistance to damage during
irradiation with neutrons. Filters consisting of a teflon membrane and a polyolefin ring were low in all trace elements except
zinc but failed mechanically during irradiation. Teflon filters backed with polyethylene or polypropylene were low in contamination
and possessed excellent resistance to irradiation damage. Polycarbonate filters proved high in bromine and copper and became
brittle during irradiation.