| 11. | She often combines 19th century chemical methods with traditional film and digital technologies.
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| 12. | Purely chemical methods had become outdated and had lost some of their intellectual appeal.
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| 13. | To obtain a confirmed analytical result, a more specific alternate chemical method is needed.
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| 14. | Van Helmont used chemical methods to study bodily products such as urine and blood.
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| 15. | If chemical methods are used, the combs must be well-aired for several days before use.
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| 16. | Chemical methods of suicide produce latent evidence of action, whereas physical methods provide direct evidence.
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| 17. | The chemical method is simpler and safer _ the workers simply spray on the foam.
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| 18. | The creeper can be controlled or eliminated by a combination of physical and chemical methods.
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| 19. | Some toxicants in these experiments by using chemical methods would affect the mechanisms of the assays.
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| 20. | In the 1950s, Wald and his colleagues used chemical methods to extract pigments from the retina.
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