Tirohia te wāhanga i raro nei, kātahi ka whakautu i te pātai i muri mai i te reo kotahi me te wāhanga:  Passage: I nga wa tata nei, ko te kamupene matū a Showa Denko, i whakatuwhera i tetahi tipu waikura ethylene i Ōita, Japan, i te 1997, i hokohoko i te hurihanga o te taumata kotahi o te ethylene ki te waikawa acetic. Ko te tukanga e whakakahahia ana e te kaiwhakawhiwhi whakarewa palladium i tautokohia i runga i te waikawa heteropoly penei i te waikawa silicotungstic. Ka whakamahia te tukanga ōrite te pūkaha whakarewa ōrite ki te waikawa silicotungstic me te silica:  Pātai: He aha te mea e whakaoho ana i tēnei tukanga?
he kaiwhakawhiwhi whakarewa palladium i tautokohia i runga i te waikawa heteropoly