Ka taƙaita labarin:  International Prototype Kilogram (hoton) ya zubar da 0.0001g a karnin da ya gabata, wanda ya jagoranci masana kimiyya su zo da mafi daidaitattun ma'auni na taro. Matsala ce da ta shafe shekaru tana damun zukatan masana kimiyya ta yadda za a sake bayyana da kuma auna kilogram daidai. A halin yanzu ma'aunin ya dogara ne da silinda na ƙarfe - wanda ya kamata ya kai nauyin gram 1,000 - wanda aka kulle a Paris. Amma silinda yana rage nauyi a hankali, hakan ya sa masu bincike a Jamus suka nemi sabon tsari don su ƙayyade kilo daidai. A karni na karshe, International Prototype Kilogram ya rasa 100 micrograms (0.0001g), wanda ko da yake yana kusa da nauyin ƙurar ƙura, yana nufin kilogram na hukuma yana zama a hankali ya zama ba daidai ba. Masana kimiyya a Cibiyar Nazarin Ƙididdiga ta Ƙasar Jamus (PTB) da ke birnin Braunschweig sun ƙirƙiro wata dabara mai kyau don a san ainihin nauyin abu, wanda ya ƙunshi ƙidayar adadin ƙwayoyin da ake bukata don a samu kilogram guda, maimakon dogara ga ƙarfe. Amma domin su ci nasara a tseren kasa da kasa don sake fasalin kilogram, dole ne su kammala hanyar ta hanyar bunkasa duniya mafi zagaye. Horst Bettin, shugaban aikin kilogram na PTB, ya ce: 'Manufarmu ita ce PTB ta mallaki aiwatar da kilogram na gaba gaba daya ba tare da izini ba.<unk> Bayan shekaru da yawa na bincike, sun ƙirƙiri wata hanya ta yin lu'ulu'u masu tsabta da aka yi daga ƙananan ƙwayoyin gas na silicon. Daga siliki mai tsafta, suna iya girma da cikakkiyar lu'ulu'u guda ɗaya wanda tsarinsa na ciki yake daidai kuma ba tare da karyewa ba. Kamfanin ya ce: 'Ba tare da gurɓataccen abu ba kuma suna da tsari na yau da kullum sune abubuwan da ake bukata don nasarar gwajin.' 'Daga zagaye-jiki, silinda guda-crystals, PTB samar crystal spheres da suke zagaye fiye da wani abu a duniya.<unk> Masana kimiyya a Cibiyar Nazarin Ma'auni ta Jamusanci (PTB) a Braunschweig sun fito da wata hanya mai kyau don ƙirƙirar ma'auni mafi daidai na taro, amma da farko suna buƙatar kammala...
International Prototype Kilogram ya zubar da 100 micrograms a karni na karshe. An saita ma'aunin kilogram daga silinda na ƙarfe mai tsaro sosai. Masana kimiyya na Jamus suna aiki da yawan atoms a cikin wani yanki. Hanyar za ta ba su damar sake bayyana kilo bisa la'akari da yawan atoms.