Sökning: "LED aging"

Visar resultat 1 - 5 av 37 avhandlingar innehållade orden LED aging.

1. 1. Aging Along the Hippocampal Axis : Structure, Function and Whole-brain Connections in Association with Memory

   Författare :Kristin Nordin; Hedvig Söderlund; Agneta Herlitz; Jessica Damoiseaux; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; hippocampus; aging; longitudinal-axis; episodic memory; spatial memory; connectivity; fMRI; Psychology; Psykologi;

   Sammanfattning : Hippocampus-dependent functions display marked reductions in older age, an observation that has led to the extensive study of age effects on hippocampal properties. Even though research indicates that the hippocampus is structurally and functionally heterogeneous along its longitudinal axis, its anterior and posterior regions differentially supporting episodic and spatial memory representations, few studies explicitly consider age effects in relation to axis. LÄS MER

3. 2. On protein oxidation, lifespan and aging in Saccharomyces cerevisiae

   Författare :Hugo Aguilaniu; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; asymmetric cell division; protein oxidation; yeast; aging; signalling pathways;

   Sammanfattning : In this thesis, we have investigated the physiology of protein oxidation and its possible role in the aging of the yeast Saccharomyces cerevisiae. There are two ways to measure yeast aging. First, they can only divide a finite number of times even when all nutrients necessary for division are provided. This is replicative aging. LÄS MER

4. 3. Vehicle emissions abatement: NO oxidation and ammonia SCR

   Författare :Xavier Auvray; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SpaciMS; NO oxidation; Cu-Beta zeolite; sulfur dioxide; Platinum; ammonia SCR; aging;

   Sammanfattning : The design and the development of catalytic systems for reducing vehicle emissions is a complex task due to the variety of components in a wide range of gas flow and temperature. A complete system is, therefore, composed of a series of catalysts or catalytic systems, each of which is dealing with a particular aspect of the abatement process. LÄS MER

5. 4. Protein-based Packaging Films, Sheets and Composites: Process Development and Functional Properties

   Författare :Sung-Woo Cho; Mikael Hedenqvist; Amar K. Mohanty; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; wheat gluten; solution casting; compression molding; extrusion; injection molding; aging; migration; opacity; heat sealability; hemp fiber; laminate; polylactic acid; clay; nanocomposites.; Other chemical engineering; Övrig kemiteknik;

   Sammanfattning : The depletion of the petroleum resources and a number of environmental concerns led to considerable research efforts in the field of biodegradable materials over the last few decades. Of the diverse range of biopolymers, wheat gluten (WG) stands out as an alternative to synthetic plastics in packaging applications due to its attractive combination of flexibility and strength, high gas barrier properties under low humidity conditions and renewability. LÄS MER

7. 5. On Retirement and Cognitive Aging from a Life-Span Perspective

   Författare :Linn Elena Zulka; Göteborgs universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; cognitive aging; retirement transition; leisure activity engagement; work demands; personality; life satisfaction; initial IQ; social contacts;

   Sammanfattning : Retirement is a major life event potentially affecting domains such as cognitive functioning and well-being. The main aim of this thesis was to assess whether retirement influences cognitive functioning and how inter- and intra-individual differences in psychological and lifestyle factors moderate the association. LÄS MER