Sentence examples for metals are necessary from inspiring English sources

Trace metals are necessary entities of biological systems to trigger and regulate the key body functions.

Some metals are necessary in small amounts to sustain human life.

To make plates, 1.5% gellan gum (Wako, Osaka, Japan), 1.5 mM CaCl2, and 1.5 mM MgCl2 were added to TR medium (metals are necessary to solidify the gellan gum).

These metals are necessary for proper functioning of living organisms.

Some heavy metals are necessary for vital functions of the human body, such as iron (Fe), cobalt (Co), copper (Cu), manganese (Mn), molybdenum (Mb), and zinc (Zn).

A complicated molecular network exists to maintain iron homeostasis, as metals are necessary for many metabolic processes yet toxic to cells in high concentrations.

The analysis of heavy metals is necessary to check the condition of water quality to determine its suitability for its further use (Round 1997).

Ion exchange between ammonium-impregnated supports and the metals was necessary in order to achieve a fine dispersion of the catalyst over the support surface.

Evaluation of water-soluble heavy metals is necessary in the final vermicompost before agronomic application, because these metal fractions are biologically dynamic and have the highest potential of contaminating the food chain (Iwegbue et al. 2007; Hait and Tare 2012).

Fluctuation of content of individual metal elements in plant tissues may be associated with metabolic regulation of homeostasis at the cell level, namely, with the ability of nanoparticles to optimize the metabolic processes; thus, the content of elements increases in tissues where activity of metals is necessary because the elements studied are part of the organic molecules, such as enzymes.

Egypt relied on trade with Anatolia for essential quantities of tin as well as supplementary supplies of copper, both metals being necessary for the manufacture of bronze.