Abstract: Disclosed are a biosensing test strip (100, 200, 300, 500, 600, 700, 800, 900, 1000, 1100) and a biosensing test method. The biosensing test strip (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100) comprises: a reaction layer (120, 220, 720, 820) provided with a reaction flow channel (121, 221, 821, 920, 1020); a partition plate layer (130, 230) located above the reaction layer (120, 220, 720, 820) and covering the reaction flow channel (121, 221, 821, 920, 1020); an exhaust layer (140, 240, 540, 640) located above the partition plate layer (130, 230), with the exhaust layer (140, 240, 540, 640) being provided with an exhaust flow channel (141, 241, 550, 650); and a communication hole passing through the partition plate layer (130, 230) to enable the exhaust flow channel (141, 241, 550, 650) to be in communication with the reaction flow channel (121, 221, 821, 920, 1020).

Abstract: A porous carbonized substrate and its preparation method and uses are provided. The porous carbonized substrate has an oxygen content ranging from about 1 wt % to about 13 wt % and a nitrogen content ranging from about 2 wt % to about 16 wt %, based on the total weight of the substrate. The porous carbonized substrate can be prepared by a method comprising the following steps: providing a fiber substrate containing one or more oxidized fibers, one or more polyamide fibers or a mixture thereof; and thermally treating the fiber substrate under an inert gas atmosphere, wherein the thermally treating step comprises putting the fiber substrate in the inert gas atmosphere and increasing the temperature of the inert gas atmosphere to an elevated temperature ranging from about 700° C. to about 2000° C. with a rate of from about 50° C./minute to about 300° C./minute. The porous carbonized substrate is used as a gas diffusion layer of a fuel cell.