The invention relates to a composite containing a porous carrier and an amphiphilic material. A method for producing at oxalic acid may include receiving an anolyte feed at an anolyte region of an electrochemical cell including an anode and receiving a catholyte feed including carbon dioxide and an alkali metal hydroxide at a catholyte region of the electrochemical cell including a cathode. Further, at least a tire of the rear wheel is substantially a tire having a radial carcass with an aspect ratio of less than or equal to 80% and has at least one spiral belt. The monitoring device further comprises an evaluation unit, wherein the evaluation unit is designed to determine a thickness d of the semiconductor wafer from the radiation reflected by the semiconductor wafer during thinning of the semiconductor wafer by means of a method that is selected from the group consisting of a 1D-se FDOCT method, a 1D-te FDOCT method and a 1D-se TDOCT method. The method includes obtaining, during the scan, a current temperature of a detector of the PET scanner, and adjusting, based on the current temperature, the data acquisition parameters used by the PET scanner during the scan. The antenna apparatus preferably includes a main board equipped with a power feeding part for feeding power and a ground surface for grounding the main board and at least one sub-board, each sub-board which has a ground surface and electrically communicates with the main board, wherein the ground surface of each sub-board receives power from the power feeding part of the main board and resonates.