Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Kupfuura: Kubva muna 1901 kusvika muna 1938 akanga ari mukuru weCarlsberg Laboratory ine mukurumbira, Copenhagen. Paakanga achishanda paCarlsberg Laboratory akadzidza nezvokukanganiswa kweioni pamapuroteni, uye nokuti kuwanda kwehydrogen ions kwaikosha zvikuru, akatanga pH-scale senzira iri nyore yokutaura nayo muna 1909. Nyaya yaakataura nezvezviyero (achishandisa chiratidzo pH) yakatsanangura nzira mbiri dzokuyera acidity iyo Sørensen nevadzidzi vake vakanga vavandudza. Nzira yokutanga yakanga yakavakirwa pamagetsi, nepo yechipiri yaibatanidza kuenzanisa mavara emasampuli neboka rakasarudzwa rezviratidzo.  Mubvunzo: Sorensen akashanda somukuru wei mukati mamakore 1901 kusvikira ku1938?
Carlsberg Laboratory