Sökning: "GAP activity"

Visar resultat 11 - 15 av 177 avhandlingar innehållade orden GAP activity.

1. 11. Calcium signaling and network activity : mathematical modeling and molecular mechanisms

   Författare :Erik Smedler; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : The calcium (Ca2+) ion is a versatile second messenger present in all cells. It is involved in such diverse processes as cell division, differentiation, vesicle transport and muscle contraction. Its widespread applicability is partially explained by its wide temporal and spatial dynamics. LÄS MER

3. 12. Interactions between climate, natural disturbances, and regeneration in boreal and hemi-boreal forests

   Författare :Igor Drobyshev; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conservation strategies; Plant ecology; Växtekologi; taiga; seasonal climate; shoot increment; larch; reconstruction; human; canopy gap; fire history; boreal; natural disturbances; dendrochronology;

   Sammanfattning : Natural disturbance is an important driving force of community dynamics in many forest types around the globe. Understanding spatial and temporal properties of disturbance events in the present and in the past is important in formulating the nature conservation strategies as well as for the modeling of climate and human impacts on forest vegetation. LÄS MER

4. 13. Around the Screen : Computer activities in children’s everyday lives

   Författare :Pål André Aarsand; Karin Aronsson; Michael Tholander; David Middleton; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Ethnography; Activity frames; Computer activities; Identities; Digital technology; Classroom; family; Social interaction; Everyday life; Children; barn; datoraktivitet; digital teknologi; diskursanalys; familj; identitet; skola; social; interaktion; vardagsliv; Children; Barn;

   Sammanfattning : The present ethnography documents computer activities in everyday life. The data consist of video recordings, interviews and field notes, documenting (i) 16 students in a seventh grade class in a computer room and other school settings and (ii) 22 children, interacting with siblings, friends and parents in home settings. LÄS MER

5. 14. Astrocytic communication and cell death during metabolic depression and oxidative stress

   Författare :Christina Nodin; Göteborgs universitet; []
   Nyckelord :astrocyte; gap junction; ATP; ROS; oxidative stress; Annexin V; AIF; programmed cell death; Nrf2; scavenger; iodoacetate; SIN-1;

   Sammanfattning : Stroke is a major cause of death and adult disability in the western world. Most often, stroke is caused by the occlusion of a brain artery. Within the perfusion territory of the occluded vessel, various degrees of necrotic and delayed programmed cell death will occur if the occlusion persists, leading to expanding tissue damage. LÄS MER

7. 15. Creating Ultrafast Biosensors for Neuroscience

   Författare :Yuanmo Wang; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; quantification; glucose; choline oxidase; gold nanoparticles; enzyme monolayer; enzymatic activity; Biosensor; adsorption; brain slice; enzyme stability; acetylcholine esterase; artificial cell; exocytosis; glucose oxidase; deformation; glutamate; glutamate oxidase; acetylcholine; amperometry;

   Sammanfattning : Neuronal communication is the basis for all our brain function and relies on regulated exocytosis, a cell function that involves release of quantal amounts of neurotransmitters into the gap space between interconnected neurons to serve as chemical signals. To study exocytosis, which is a fast process that occurs on the timescale of sub-milliseconds to milliseconds, a toolbox of analytical methods has been developed where the electrochemical based techniques offer quantitative and sufficient high temporal recording speed. LÄS MER