Disabling wireless radios so that they use no power

Is there a method in RouterOS or otherwise in Mikrotik routers to disable wireless radios, such as for WiFi, so that they consume no power? If not, what about minimum power consumption?

Does simply disabling the RouterOS Wireless interfaces in the device user interface have any impact on power draws from radios and therefore reduced power from the device?

Yes. Just disable the interface and the amplifiers will be off. You can measure it easily…