<prompt> Fingqa isihloko: I - International Prototype Kilogram esithombeni yalahlekelwa u - 0.0001g ekhulwini leminyaka elidlule, okwaholela ososayensi ukuba babe nesilinganiso esinembile kakhudlwana sesisindo. Kuyinselele eye yakhathaza ososayensi iminyaka eminingi indlela yokuchaza kabusha nokulinganisa ngokunembile ikhilogremu. Okwamanje iyunithi yokulinganisa isekelwe kusilinda sensimbi - okumelwe ibe nesisindo esingamagremu angu - 1 000 ngokuqondile - egcinwa ivaliwe eParis. Kodwa kancane kancane isilinda siphelelwa isisindo, okuholela abacwaningi baseJalimane ukuba bafune indlela entsha yokuchaza ngokunembile ikhilogremu. I-International Prototype Kilogram ilahlekelwe ama-microgram angu-100 0.0001g ekhulwini leminyaka elidlule, okuyinto nakuba icishe ilingane nesisindo sezinhlayiyana zothuli, kusho ukuthi ikhilogremu elisemthethweni liya lifiphala kancane kancane. Ososayensi base-German Nation Metrology Institute PTB eBraunschweig baye bavela nendlela ehlakaniphile yokwakha isilinganiso esinembile kakhudlwana sesisindo, esihilela ukubala inani lama-athomu adingekayo ukuze kwakhiwe ikhilogremu, kunokuba bathembele engxenyeni yensimbi. Kodwa ukuze banqobe emncintiswaneni wamazwe omhlaba wokuchaza kabusha ikhilogremu, kumelwe baphelelise le ndlela ngokwakha isiyingi esiyindilinga kunazo zonke emhlabeni. UHorst Bettin, oyinhloko yephrojekthi ye-kilogram ye-PTB, wathi: Umgomo wethu ukwenza i-PTB ikwazi ukufeza i-kilogram yesikhathi esizayo ngokungaziwa ngokuphelele. Ngemva kweminyaka yocwaningo, baye basungula indlela yokwenza amakristalu ayindilinga ahlanzeke ngokumangalisayo enziwe ngama-vortex amancane egesi yesilicon. Ngesilicon esimsulwa ngokumangalisayo, bayakwazi ukukhulisa i-single-crystal engenamaphutha enesakhiwo sangaphakathi esivamile ngokuphelele futhi esingenamaphutha. Le nkampani yathi: Ukungabi khona kokungcola nokuba nesakhiwo esivamile kuyisisekelo sokuphumelela kwalokhu kuhlolwa. Kusuka kumakristalu ayindilinga, ayizindilinga, i-PTB ikhiqiza ama-crystal spheres ayindilinga ngaphezu kwanoma yini enye emhlabeni. Ososayensi base-German Nation Metrology Institute PTB eBraunschweig baye bavela nendlela ehlakaniphile yokwakha isilinganiso esinembile kakhudlwana sesisindo, kodwa kudingeka baqale baphelelise...  <response>: I-International Prototype Kilogram yalahlekelwa ama-microgram angu-100 ekhulwini leminyaka elidlule. Isilinganiso sekhilogremu sibekwa kusilinda sensimbi egadiwe kakhulu. Ososayensi baseJalimane basebenzela ukuthola ukuthi mangaki ama-athomu asemkhakheni othile. Le ndlela kufanele ibenze bakwazi ukuchaza kabusha ikhilogremu ngokusekelwe enanini lama-athomu. 