| 21. | The concentration of methylene chloride ranged from 0 to 15 parts per billion.
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| 22. | The methylene group projects from the plane of the six coordinated carbon atoms.
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| 23. | Methylene-THF is then used by serine hydroxymethyltransferase to synthesize serine from glycine.
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| 24. | Methylene blue can be used to stain plant cells
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| 25. | Rarer modifications can occur at oxidized methionines and at some methylenes in side chains.
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| 26. | Thus, the two products are S-adenosylhomocysteine and phospholipid methylene fatty acid.
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| 27. | Eventually the methylene group is further reduced and released as a molecule of methane.
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| 28. | Methylene blue is reduced to colorless leucomethylene blue.
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| 29. | Simple carbenes such as the methylene radical and dichlorocarbene are not regioselective towards insertion.
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| 30. | She noted that the methylene blue dye used in the experiment was not reduced.
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