Sentence examples for metals are present from inspiring English sources

If platinum metals are present, they will alter the appearance of the bead, and their concentration can sometimes be determined by use of an arc spectrograph.

The actual chemical make-up of rocks is complex, so the conventions of petrological analysis pretend that these metals are present in basalt as their oxides.

4. Weighing: the bead is weighed to determine the total of gold and silver (the platinum metals are present in too little quantity to affect the measurement).

Atomic absorption spectrophotometry has shown that ultratraces of metals are present in the aragonite skeleton of the hydrozoan coral Millepora from a reef flat on the Coral Sea Plateau off Queensland.

Heavy metals are present naturally in soil in low concentrations.

Metals are present in earth's crust and its contents distribute in the nature through food cycle and energy cycle.

Several examples of such clusters of semiconductors and metals are presented.

The mean concentrations of essential and non-essential metals are presented in Table 2 for the samples digested by the three different digestion methods.

In this paper the additional features of the model such as the possibility to simulate supercritical water and liquid metals are presented.

The results of the first steps in the design of coordination polymers based on penta- and heptacyanometallates of heavier d transitions metals are presented.

Urine metals are presented uncorrected to allow comparison with previously reported data, but adjustment for creatinine was done in multivariate models by including it as a covariate.