Search for dissertations about: "experimental mineralisation"

Found 5 swedish dissertations containing the words experimental mineralisation.

2. 1. Untangling ambiguities in the microbial fossil record : experimental abiotic and biological approaches

   Author : Sigrid Huld; Anna Neubeck; Sebastian Willman; Sean McMahon; Barbara Cavalazzi; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; chemical gardens; pseudofossils; experimental mineralisation; microbial fossils; methanogens;

   Abstract : Life on early earth has long been the topic of discussion for many researchers: how did it come to be? Which cells came first? Where can we find them? The most ancient rocks on our planet may hold some of the answers to these questions, but many may only be answered in laboratories. Chemical and morphological traces can be found from Archaean deposits, tantalisingly similar to modern day prokaryotes. READ MORE

4. 2. Bladder exstrophy : Clinical and experimental aspects

   Author : Christina Clementson Kockum; Lund Pediatrik; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pediatri; Bladder exstrophy. Children. Urinary diversion. Menthal health.; Pediatrics; Urology; nephrology; Urologi; nefrologi;

   Abstract : Bladder exstrophy is a complex malformation seen in 1/30 000. Most children are subject to repeated operations, including pelvic osteotomy, genital and bladder neck reconstruction and sometimes bladder augmentation or a urinary reservoir, to achieve continence and a normal genital function. READ MORE

5. 3. Bone structure characterisation using neutron scattering techniques

   Author : Elin Törnquist; Avdelningen för Biomedicinsk teknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biomechanics; neutron tomography; x-ray tomography; small-angle neutron scattering SANS ; small-angle x-ray scattering SAXS ; Experimental mechanics; implant integration; tomography; nanoscale; microscale; mechanical properties;

   Abstract : Bones have unique mechanical properties that originate from their main constituents: mineral, in the form of hydroxyapatite (HAp) crystals, and collagen type-I. The stiffness of the HAp mineral combined with the flexibility of collagen, and their intricate hierarchical arrangement from the smallest individual building blocks to the organ level, result in a composite tissue with a remarkable ability to withstand complex loading scenarios. READ MORE

6. 4. Persistent organic pollutants and bone tissue : studies in wild and experimental animals

   Author : Rebecca Lundberg; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Bone; POPs; dioxin; DDT; PCB; pQCT; biomechanics; ALP; CTX;

   Abstract : Since the mid 1900s, there has been a dramatic increase in the number of osteoporotic-related fractures in the industrialised world. The reason for this is unknown, but there could be a link between the increased use and production of chemicals and effects on bone. READ MORE

7. 5. Transport by Benthic Macrofauna: Functional Classification and Biogeochemical Response

   Author : Stina Lindqvist; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Marine sediments; Early diagenesis; Bioturbation; Functional groups; Benthic fluxes; Imaging; Ecosystem function; Sediment reworking; Transport proxies; Fluorescent particles;

   Abstract : Burrowing and reworking activities by benthic macrofauna regulate rates and pathways during organic matter mineralisation in bioturbated sediments. In so doing, they also affect the overall cycling of elements crucial in the biosphere (e.g. C, N, P, Fe, Mn and S). READ MORE