Sökning: "Calcium phosphate"

Visar resultat 36 - 40 av 98 avhandlingar innehållade orden Calcium phosphate.

1. 36. Experimental, petrological and geochemical investigations of ikaite (CaCO3·6H2O) formation in marine environments

   Författare :Elin Tollefsen; Alasdair Skelton; Carl-Magnus Mörth; Erik Sturkell; Andrew Putnis; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ikaite; petrology; experiment; geochemistry; marine environments; pseudomorphs; calcium carbonate; Ikka Fjord; glendonite; nepheline; siderite; paleotemperature; carbonatite; Geology; geologi;

   Sammanfattning : Carbonates are a group of minerals that play an essential role in several processes on planet Earth, for example in the global carbon cycle and as a product of biomineralisation. Calcite (CaCO3) is by far the most common mineral in the carbonate group, and the stable form of carbonate at Earth surface conditions. LÄS MER

3. 37. Bone Regeneration with Cell-free Injectable Scaffolds

   Författare :Gry Hulsart Billström; Sune Larsson; Kenneth B Jonsson; Jöns Hilborn; Håkan Engqvist; Olle Svensson; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bone tissue engineering; hydrogel; computed tomography; positron emission tomography; large femoral bone defect; rat model; hydrogel; in vivo; osteogenesis; bone regeneration; 3R; single-photon emission computed tomography; bone morphogenetic protein 2; calcium phosphates; injectable; bisphosphonate;

   Sammanfattning : Bone is a remarkable multifunctional tissue with the ability to regenerate and remodel without generating any scar tissue. However, bone loss due to injury or diseases can be a great challenge and affect the patient significantly. Autologous bone grafting is commonly used throughout the world. LÄS MER

4. 38. Cyanide and central nervous system : a study with focus on brain dopamine

   Författare :Gudrun Cassel; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; CNS; cyanide; dopaminergic system; convulsions; receptor binding; tyrosine hydroxylase; monoamine oxidase; extracellular release; inositol phosphate; GABA; GAD;

   Sammanfattning : The brain is a major target site in acute cyanide intoxication, as indicated by several symptoms and signs. Cyanide inhibits the enzyme cytochrome oxidase. This inhibition causes impaired oxygen utilization in all cells affected, severe metabolic acidosis and inhibited production of energy. LÄS MER

5. 39. Mechanisms of apoptosis in secretory and neuronal cells : role of oxidative stress and calcium overload

   Författare :Maria Ankarcrona; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Apoptosis is a widespread physiological mechanism to regulate tissue homeostasis both during development and in adult organs. However, the cell deletion program can be inappropriately activated or suppressed under pathological conditions. LÄS MER

7. 40. Plant Phosphoinositide Kinases. A Study of PtdIns 4-kinases and a PtdIns 4-phosphate 5-kinase

   Författare :Tomas Westergren; immunologi och glykobiologi - MIG Avdelningen för mikrobiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; regulation; plant phosphorylation; plasma membrane; lipid kinase; divalent ion; phosphoinositide; substrate specificity; Plant biochemistry; Växtbiokemi;

   Sammanfattning : Phosphoinositides are of particular interest in signal transduction processes as they can be sequentially phosphorylated and used as precursors for the intracellular messengers inositol trisphosphate (InsP3) and diacylglycerol (DAG) that in turn affects calcium levels and protein kinase cascades, eventually leading to a physiological response. The activity and regulation of PtdIns 4-kinases and PtdInsP kinase was studied. LÄS MER