Sökning: "enameloid"

Hittade 2 uppsatser innehållade ordet enameloid.

1. 1. Exploring the physiological variables of oxygen isotope composition in chondrychthyan teeth

   Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning; Uppsala universitet/Institutionen för organismbiologi; Uppsala universitet/Evolutionsbiologi

   Författare :Carlos Oliveira; [2019]
   Nyckelord :chondrichthyan; oxygen; isotope; fractionation; teeth; enameloid; dentine;

   Sammanfattning : Since the discoveries of vertebrate bioapatite’s ability to record oxygen isotopecomposition of ambient seawater were made (Kolodny, 1983), oxygen isotopes have beenwidely used as a climatic and oceanographic proxy. The δ18OP aquatic vertebrate apatite isa function of the δ18Ow value of the ambient water, yet “vital effects” on the δ18OP compositionhave been reported previously (Venneman et al. LÄS MER

3. 2. Oxygen isotope composition (δ18O) in Sandbar Shark teeth as a proxy to environment : developmental and morphofunctional variability

   Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

   Författare :Junyu Chen; [2019]
   Nyckelord :Oxygen isotopes; Sandbar Shark; enameloid; shark teeth;

   Sammanfattning : Oxygen isotope composition is a well-known environmental proxy, studied in both fossil and living organisms. In this research project, the ratio of δ18O was studied in the biomineral of enameloid tissue of Sandbar Shark teeth. All the sharks were kept in the tropical ocean tank of the Blackpool Sea Life Center (UK). LÄS MER