Abstract: The present disclosure relates a biocompatible biodegradable polymer matrix which serves as a template for the growth of differentiated skin tissue comprising a dermis and an epidermis, the combination of the matrix and the differentiated skin, the method of preparing the same and the tissue obtainable from said method. The disclosure also extends to use of the differentiated skin in treatment. Thus, there is provided a matrix of electrospun fibres for growing differentiated skin tissue prepared by electrospinning solution of a biocompatible biodegradable polymer, wherein the electrospun fibres are about 0.3 ?m to about 5 ?m in diameter for example 1 to 5 ?m, such as 1, 1.5, 2, 2.5, 3, 3.5, 4, or 4.

Abstract: A gas detection system comprising a gas sensor having a detection surface for detecting an analyte gas, the accuracy of detection being degraded by the presence of an unwanted gas at the sensor, and a thermal scrubber layer directly adjacent said detection surface of the gas sensor defining a diffusion path for the analyte and unwanted gases to traverse through to the detection surface, the diffusion path having a sufficient length and the thermal scrubber being heated by the heater to a sufficient temperature capable of at least partially thermally decomposing the unwanted gas prior to contacting the detection surface to thereby improve the accuracy of the sensor. The system further comprises a heater that is preferably arranged to heat both the detection surface and the thermal scrubber. The invention is particularly useful for improving the performance of an NO2 gas sensor in the presence of ozone (O3).

Abstract: A gas detection system comprising a gas sensor having a detection surface for detecting an analyte gas, the accuracy of detection being degraded by the presence of an unwanted gas at the sensor, and a thermal scrubber layer directly adjacent said detection surface of the gas sensor defining a diffusion path for the analyte and unwanted gases to traverse through to the detection surface, the diffusion path having a sufficient length and the thermal scrubber being heated by the heater to a sufficient temperature capable of at least partially thermally decomposing the unwanted gas prior to contacting the detection surface to thereby improve the accuracy of the sensor. The system further comprises a heater that is preferably arranged to heat both the detection surface and the thermal scrubber. The invention is particularly useful for improving the performance of an NO2 gas sensor in the presence of ozone (O3).