The MN is required to register with the home agent (HA) whenever the MN changes its point of attachment.
As result, when the alloy is prepared using conventional induction or arc-melting casting methods, additional Mn is required to compensate the precipitation of Mn.
Essential heavy metals (Cu, Co, Zn, Fe, Ca, Mg, Se, Ni and Mn) are required in very trace quantities for the proper functioning of enzyme systems, hemoglobin formation and vitamin synthesis in human but metabolic disturbances are encountered in case of excess of these essential metals (Hina et al. [2011]).
Mn is required for human nutrition; however, the accumulation of Mn may cause hepatic encephalopathy in humans (Layrargues et al. 1998).
One study clarified that the structural flexibility caused by Mn2+ is also important for enzyme dynamics, because Mn is required for RNA polymerization [ 4].
Thus, in accordance with the absence of significant mortality during the treatments with Mn, it could be hypothesized that a higher threshold level of Mn is required to upregulate the hsp70 gene expression.
As an essential nutrient, Mn is required for the normal function and development of the brain [ 1], metabolism of proteins, lipids, and carbohydrates [ 2– 4], and also as a functional unit for many enzymes [ 3– 5].
This suggests that no major evolutionary invention was required for photosystem II to tap environmental Mn as an electron source.
MN hunters were required to register harvested bears and report the sex.
The micronutrients such as Zn, Mn, and Cu are required in small but critical concentrations for both plants and animals, and these have vital role in physical growth and development of crop plants such as paddy.
