Browsing by Subject "Earth and Planetary Sciences (all)"

Now showing items 1-3 of 3

    • Derivative spectrophotometric method for copper determination 
      Toral Ponce, María; Richter Duk, Pablo; Muñoz, Braulio (Kluwer Academic Publishers, 1995)
      A simple, sensitive and selective method by solvent extraction-first derivative spectrophotometry is described for the determination of microamounts of copper in water by means of its reaction and extraction at pH 8.0 with ...
    • Late quaternary vegetation of southern Isla Grande de Chiloé, Chile 
      Villagran, Carolina (1988)
      Late-glacial-Holocene forest history of southern Isla Chiloé (latitude 43°10′ S) was reconstructed on the basis of pollen analysis in three profiles (Laguna Soledad, Laguna Chaiguata, Puerto Carmen). Prior to 12,500 yr ...
    • Mid-Holocene climate and culture change in the Atacama Desert, Northern Chile 
      Grosjean, Martin; Núñez, Lautaro; Cartajena, Isabel; Messerli, Bruno (Academic Press Inc., 1997)
      Twenty archaeological campsites intercalated between more than 30 debris flows caused by heavy rainfall events between 6200 and 3100 14C yr B.P. have recently been discovered at Quebrada Puripica in the Atacama Desert of ...