Example sentences of "can be [verb] by the addition " in BNC.
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| 1 | A chemical breakdown can be achieved by the addition of any readily available nitrogen source such as sulphate of ammonia , or Nitro-chalk , but these soluble salts can inhibit bacterial action and the end-product is not so well balanced and does not produce such good results . |
| 2 | While the concrete is still wet , a more natural effect can be created by the addition of rockwork set into the concrete to create the faces of each small basin . |
| 3 | As in a conventional compost heap , the process can be hastened by the addition of animal waste , either by very intensive grazing or by spreading FYM or slurry before ploughing . |
| 4 | Fortunately , it can be prevented by the addition of special chemicals to the water in the system . |
| 5 | It causes leaks and blockages in the system , and is a contributor to pump failure , but it can be prevented by the addition of special chemicals . |
| 6 | This loss of immunoreactivity in serum and urine can be prevented by the addition of 20 mM zinc acetate or by boiling for 10 minutes . |
| 7 | This can be avoided by the addition of ammonium sulphate . |
| 8 | It can be varied by the addition of freshly chopped herbs , mustard powder , lemon juice or garlic , or indeed by using a nut oil or a flavoured vinegar . |
| 9 | Often performance of simple washing towers can be improved by the addition of small amounts , usually 1% weight/weight of chemical reactants , the most suitable being neutralizing agents and oxidising agents which will react with a wide range of malodorous compounds . |
| 10 | Removal can be effected by the addition of sodium bisulphite , but the source of the chlorine should be located and stopped , so that the trouble does not persist . |