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Large expansion & restruc in biology and med
Recently, the article has been expandeed and restructured wrt == sections Aapplication, Biological role, Soil remediation, Precautions. Mostly by Doc James and Sepi333. See also previous talk #Split biology?.
As it stands now, I think the TOC shows that these topics (and their subsections) show repetition or being split over multiple sections. It also indicates that there may be too much detail. If large protion of medicine/bio aspects are to be included (limit? off-topic?), at least the top sections should be complete and non-repetitive. Say: Application, Biological, [Human?] Health/Medicine only. -DePiep (talk) 09:24, 9 January 2018 (UTC)
^Cherasse Y, Urade Y (November 2017). "Dietary Zinc Acts as a Sleep Modulator". International Journal of Molecular Sciences. 18 (11): 2334. doi:10.3390/ijms18112334. PMC5713303. PMID29113075. The trace metal zinc is an essential cofactor for more than 300 enzymes and 1000 transcription factors . ... In the central nervous system, zinc is the second most abundant trace metal and is involved in many processes. In addition to its role in enzymatic activity, it also plays a major role in cell signaling and modulation of neuronal activity.
The source for note 157 should be noted as a deadlink