text: let masses = { "g": 1, "mg": 1e-3, "kg": 1e3, "ug": 1e-6, "ng": 1e-9 }
  let volumes = { "l": 1, "ml": 1e-3, "ul": 1e-6, "nl": 1e-9, "litres": 1, "litre": 1, "liters": 1, "liter": 1 }
  
  export { masses, volumes }
  