Assertion: tourmaline | /r/HasProperty | carried on material
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Source sentences:
text: The reason is that, when tourmaline is carried on a material having a resistance value higher than that of a tourmaline crystal (approximately 1010 to 1011 Ω·cm), the tourmaline electrodes lose their functions, because it is substantially unlikely that electrons flow, or are transported, between the electrodes in the reaction system due to the presence of the material having such a high resistance value between the substance in the system which undergoes the cathode-anode reaction and the electrodes.