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zinc and lead
Although the reaction of α,α-dibromo-α-fluorotoluene with zinc and lead involves formation of fluoro(phenyl)carbene, this procedure is not suitable for the synthesis of 2-fluoro-2-phenylaziridines.
      
The Use of the Mortality Rate of Marine Fish Prelarvae for the Estimation of Zinc and Lead Toxicity
      
According to the results of model experiments with artificial contamination of soil, the flux of zinc and lead from the starting point (from a medium loamy leached chernozem) to the final point (wheat grains) sharply decreases.
      
The adsorption of zinc and lead on hair was dependent on the acidity of the hair and/or the medium in which the hair sample was immersed, suggesting that hair is an ion exchanger.
      
Age- and sex-related differences in zinc and lead levels in human hair
      
Trends in diffusion-limited condensation of zinc and lead vapors
      
The condensation of zinc and lead vapors is considered for equipment for vacuum processing of metallurgical melts; measurements have been made of the diffusion coefficients for these vapors in helium, argon, and nitrogen.
      
As a consequence of the high temperature of the aluminothermic reaction, zinc and lead oxides can be separated from the iron phase during the reaction.
      
The zinc and lead distributions in different facies types (i.
      
Approaching the "Raibler Schichten" (Carnian) the lagunal facies contains stratiform zinc and lead anomalies (Zn>amp;gt;150 ppm, Pb>amp;gt;15 ppm).
      
Furthermore zinc and lead halos in the carbonate host rocks were investigated.
      
An experimental study on the partition of zinc and lead between the silicate and sulfide liquids
      
On the basis of experimental works in the FeS-FeO-SiO2(-Fe3O4 or -Na2O) system with synthetic ZnS or PbS, the partition of zinc and lead between silicate and sulfide liquids is shown to be affected by the oxygen content of the sulfide liquids.
      
% in silicate liquid, for zinc and lead go through a minimum at relatively low oxygen contents of the sulfide liquids.
      
Although KZn and KPb change appreciably with oxygen content of the sulfide liquids, they never become sufficiently high to concentrate zinc and lead in economic amounts in magmatic sulfide ores.
      
Of the ore metals the downward-penetrating convection fluids first leach and transport zinc and lead, but with increasing temperature are later able to leach and transport some copper.
      
Paleomagnetic and rock magnetic measurements are reported for 294 specimens from 23 sites in mineralization and its carbonate host rocks from the deposit as well as on 15 artificial specimens of zinc and lead concentrate and of tailings.
      
Column-chromatographic separation of mercury, cadmium, zinc and lead with phosphated cellulose in hydrochloric acid media
      
Depending on the growth technique, impurity concentrations were found to range from 280 Μg/g for bromine to 2000 and 9000 Μg/g for zinc and lead, respectively.
      
Sampling of zinc and lead species seemed to be problematic in all cases.
      
 

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