| The hexane extract was evaporated, redissolved in chloroform and passed through a short silica gel column. |
| The level of soluble calcium in lime slurry is significantly increased with the addition of silica fume. |
| Since silica can only limit diatoms, other forms of phytoplankton might dominate if nitrogen is regenerated more rapidly. |
| They used various materials such as lime, copper, silica, iron oxides, and chalk to produce numerous colors. |
| As the pH of water glass is lowered, colloidal particles of amorphous silica are formed. |
| An aerogel is a porous network of silica strands with diameters of a few nanometres. |
