Sökning: "activity linking"

Visar resultat 11 - 15 av 107 avhandlingar innehållade orden activity linking.

1. 11. Investigations of temporal changes in climate and the geomagnetic field via high-resolution radiocarbon dating

   Författare :Anette Mellström; Kvartärgeologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; wiggle-matching; Radiocarbon dating; 14C; 2800 cal BP; climate change; solar activity; palaeomagnetism; lake sediments; varves; post-depositional remanent magnetisation; PDRM; lock-in; peat deposits; Sweden;

   Sammanfattning : Geological archives have shown periods of abrupt climate change in the relatively stable Holocene epoch (last ca. 11 700 years). One of these periods was around 2800 cal BP. Several records, mainly from Europe, reveal a shift towards wetter, cooler and windier conditions. LÄS MER

3. 12. The complex world of proteins: Structure, function, and oligomerization of frataxin

   Författare :Christopher Söderberg; Biokemi och Strukturbiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Frataxin; Friedreich s ataxia; self-assembly; protein-protein interaction; iron homeostasis; SAXS; cross-linking;

   Sammanfattning : Patients suffering from the deadly progressive neurodegenerative disease Friedreich's ataxia have reduced levels of expression of the protein frataxin. Yeast frataxin has been extensively studied in vitro, and has been shown to deliver iron to heme and iron-sulfur cluster biosynthesis, as well as to oligomerize in the presence of iron. LÄS MER

4. 13. Engineering of lignin in wood towards functional materials

   Författare :Gabriella G. Mastantuoni; Qi Zhou; Lars Berglund; Jean-Marie Raquez; KTH; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cellulose; wood; nanotechnology; sulfonation; biocomposite; cross-linking; densification; transparent film; wood foam; conductivity; Cellulosa; trä; nanoteknologi; sulfonering; biokomposit; tvärbindning; förtätning; transparent film; poröst trämaterial; konduktivitet; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : Through 270 million years of evolution, the finely tuned hierarchical structure of wood has been optimized for efficient nutrient transport and exceptional mechanical stability. Its distinctive orthotropic constitution can provide inspiration and design opportunities for the development of novel functional materials. LÄS MER

5. 14. Interfacial Properties of Film Forming Proteins and their Layer-by-Layer Assembly with Nanoparticles

   Författare :Olga Krivosheeva; Per Claesson; Thomas Arnebrant; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; protein adsorption; mussel adhesive protein; Mefp-1; hydrophobins; HFBI; HFBII; adsorption kinetics; layer-by-layer; stability; cross-linking; zeta-potential; dual polarization interferometry; quartz crystal microbalances;

   Sammanfattning :  The aim of this thesis work was to investigate the interfacial properties of film forming proteins, stability of the layers created by them, and their interactions with nanoparticles. Mussel adhesive protein (Mefp-1) and hydrophobins (HFBI and HFBII) were the three main proteins used. LÄS MER

7. 15. The type-I acyl-CoA thioesterase/acyltransferase gene family : linking structure to function

   Författare :James O'Byrne; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Type-I acyl-CoA thioesterase acyltransferase gene family; structure function relationship; nueleophilic elbow; esterase transferase activity;

   Sammanfattning : Acyl-CoA thioesterases hydrolyse acyl-CoAs to non-esterified fatty acids and coenzyme A (CoASH), thereby regulating intracellular levels of these compounds. We have recently identified and initiated characterisation of a novel, unique gene family of acyl-CoA thioesterases/acyltransferases, called the Type-I acyl-CoA thioesterase/acyltransferase gene family. LÄS MER