1964, Corran et Mutane bisa sakamakon nazarin na Vulcanizate, da MBT Sy-sy-sm, ms-sx-sy-sm da kuma ms-sx-sy-sm da kuma ms-sx-sy-sm da kuma ms-sx-sy-sm da kuma ms-sx-sy-sm da kuma ms-sx-sy-sm da ms-sx-sy-sm da Matsakaitan aiki.} Atsized wani nau'in sulfde-da aka haɗa shi a ƙarshen, kuma lokacin da ya ba da rarar mai amfani da roba don samun roba mai ƙarfi don samun roba mai rauni {11}
A shekarar 1969, manik da sauran mutane bisa gabatarwar acid din kitse kan tasirin cigaba da companizing a cikin mawuyacin hali a lokacin da cran steora {4} to, da, dauki zinc satar gishiri, ta hanyar hadin gwiwar kungiyar sulfur, da (a) Raba tare da Murmushi na Thibole (a) don samar da tsaka-tsaki (a) {7} (b) amsa tare da roba hydrocarbon r don samar da mSsxr {{8} onits ne ba a bayyana shi ba, kuma ana hade da iions tare da roba mai kyau don samar da roba mai kyau {9}