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Zinc fingers and other metal-binding domains. Elements for interactions between macromolecules. Citations & References

  • Authors: Berg JM
  • Journal: J Biol Chem
  • PubMed ID: 2108957

Application Note: Accurate Measurement of Elemental Impurities in Metals and Metal Alloys Using the iCAP TQ ICP-MS Product Literature

Is an air-jacketed water bath compatible with Lab Armor Beads? Product FAQ

Answer

In general, air-jacketed water baths provide better overall heat distribution and temperature gradients. The air jacket that surrounds the tub portion of the bath allows the heated air generated by the heat element at the base of the tub to also warm the walls of the tub. Baths with heated walls transfer heat to the beads from 4 directions. Baths without air jackets less efficiently heat the beads from the bottom only.

Be aware that when the bath's heating element is not recessed below the tub, but is instead fixed to the tub by metal-to-metal contact, the base of the bath can become very hot in areas where contact is made. This produces hot spots at the bottom, which results in uneven gradients in the bath. Heating elements that only cover a small portion of the base of the tub can make this problem worse. Such baths produce hot spots, whether water or beads are used.

Answer Id:: E18567

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Zinc and cadmium can promote rapid nuclear translocation of metal response element-binding transcription factor-1 Citations & References

  • Authors: Smirnova, I. V. et al.
  • Journal: Journal of Biological Chemistry
  • PubMed ID: 0

Application Note: Trace Elemental Quantification, Including Heavy Metals in Wheat, Using ICP-MS Product Literature

In an online elemental analysis system, how critical is a given stream is in the overall process control strategy? Product FAQ

Answer

If the critical streams are monitored frequently as per the recommended criteria, the operators should be able to control the plant to give overall stability and best metallurgical results at minimum cost. The less critical intermediate streams can then be monitored at a lower frequency for the fine tuning of the circuit.

The degree of confidence required in the assay-based control decisions must be known. Streams that are more critical for control of the plant need to be monitored more frequently. Trends in plant performance will then be shown in more detail, showing effect of control actions on grade in real-time and giving greater confidence in control decisions. For example, in a base metal concentrator, the main objective might be to minimize metal losses in primary floatation while producing a particular concentrate grade in the cleaners. In addition, test work may show that recirculating loads tend to build up in the cleaning stages which is a result of recovery of excessive gangue in the rougher concentrate. Continuous analysis of tailings grades provides a critical tool in the operation of rougher flotation. On-line analysis of concentrates provides a tool to manage grade-recovery in the cleaners and better control impurities to meet the smelter requirements.

Answer Id:: E20201

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Application Note: Bulk Ore Sorting in Base and Precious Metals Product Literature

Application Note: Bulk Ore Sorting in Base and Precious Metals (ES) Product Literature

XL2100G Alloy Analyzer Limits of Detection Product Literature

What capital constraints should be considered when selecting an online slurry analysis system? Product FAQ

Answer

When selecting the right online slurry analysis system, there are several capital constraints that should be considered, including

- Capital investment,
- Economic benefits expected
- Cost of on-going maintenance
- Flexibility of system modules
- Incremental benefits of less essential assays.

The economic benefits of having an on-line slurry analysis system coupled to a control system, be it manual or fully automatic, comes from one or more of the following: increase in metal recovery, improvement in concentrate grade and control of impurities, reduction in reagent consumption, decrease in operating costs, and improvement in stability of the operation.

These benefits have to be weighed against the capital investment of the analysis system and the cost of on-going maintenance including mechanical repairs, sample pump servicing or replacement, sample transport system troubleshooting, electronic repairs, analyzer downtime and calibration. The flexibility of hybrid systems of dedicated analyzers for the critical streams and multi-stream analyzers for the less critical streams enables the most cost effective analysis system to be selected for each particular plant. In working out what streams are to be measured, a cost benefit analysis should be carried out to guide the decision making process.

Answer Id:: E20198

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Determination of 12 Kinds of Metal Elements in Soils and Sediments using Aqua Regia Extraction-Inductively Coupled Plasma Mass Spectrometry Product Literature

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