Sökning: "Dating"

Visar resultat 21 - 25 av 248 avhandlingar innehållade ordet Dating.

1. 21. Mesoproterozoic crustal evolution in Southern Africa

   Författare :Åsa Pettersson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Namaqua-Natal province; Mezoproterozoic; geochronology; U-Pb zirkon dating; Sm-Nd model ages; Ar-Ar dating; Southern Africa;

   Sammanfattning : The objects of this thesis were to use geochronology to investigate crustal evolution of part of Southern Africa that formed during a global event, resulting in the ~1 Ga supercontinent Rodinia. The timing of assembly by continent-continent collisions and the position of the individual continental blocks of this ancient landmass is still largely unknown. LÄS MER

3. 22. Investigating adipose tissue turnover in humans using radiocarbon dating

   Författare :Keng-Yeh Fu; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Obesity, defined as an excessive accumulation of body fat, is considered one of the major health challenges facing the world today. Adipocyte and lipid turnover determine the number and the size of fat cells, respectively. LÄS MER

4. 23. A study of some problems connected with C14 dating

   Författare :Ingrid U. Olsson; Uppsala universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : .... LÄS MER

5. 24. Dating for innovation : recognizing and creating opportunities in fluid environments through collaborative interorganizational relationships

   Författare :Cassandra Marshall; Handelshögskolan i Stockholm; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

   Sammanfattning : Both practice and theory present good reason to believe that collaborative interorganizational relationships have become particularly important for innovation and new product development in industries characterized by rapid technological change and dynamic competition. Even though collaboration across organizational boundaries represents an important change in the way companies innovate and develop new products (services and processes), it appears as if the process and practical steps of such arrangements are scantly explored. LÄS MER

7. 25. Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes

   Författare :Rolf Zale; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lake sediments; Antarctic Peninsula; radiocarbon dating; climatic and environmental changes; sediment chemistry; naturgeografi; Physical Geography;

   Sammanfattning : Lakes and lake sediments from four areas around the Antarctic Peninsula are described.The concentrations of trace metals in sediment are found to be a useful tool in distinguishing between the different sedimentary phases during a transition from marine to limnic environment. LÄS MER