semicolon

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One of my colleagues asked me to revise "To investigate the effect of growth time, graphene films were first synthesized using different heating ramp rates; Figure 1a-c shows SEM images of those synthesized at a ramp rate of 500 °C/h." as follows:

"To investigate the effect of growth time, graphene films were first synthesized using different heating ramp rates; Figure 1a-c showing SEM images of those synthesized at a ramp rate of 500 °C/h."

The reason he gave was "Given the use of the semicolon, it is necessary to use the verb form as a gerund (a verb that functions as a noun) to ensure an independent clause (i.e. that the second part of the sentence contains both a verb and a noun). This also creates a structure that is more akin to that used by native English speakers."

How do I explain that he is wrong?  

asked May 16 '14 at 09:11 Joyce F Contributor

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