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Long-term moisture transport in high performance concrete

Abstract in French L'humidité a une influence prépondérante sur un grand nombre de processus d’interaction et de transport qui affectent de manière directe la durabilité, le retrait et le comportement des bétons à haute performance (BHP) soumis à différents types de conditions d’exposition. Une étude expérimentale sur les propriétés de transport d'humidité de 20 mélanges de béton a été effectuée dMoisture is decisive for a large number of binding and transport processes in high performance concrete affecting the durability, shrinkage and performance in various envi-ronments. An experimental study on the moisture transport properties of 20 concrete mixes was made during seven years, with type of binder, additives and water-binder ratio as parameters. An upside-down glass cup method was used

An Alkaline Active Cyclodextrin Glycosyltransferase from an Alkaliphilic Bacillus agaradhaerens

Soda lakes represent the most stable naturally-occurring alkaline environments on Earth and harbour a diverse population of alkaliphiles. Alkaliphilic microorganisms have attracted a great interest due to their ability to produce extracellular enzymes that are active and stable at high pH values. Screening for alkaliphilic starch-hydrolyzing bacteria from samples of soda lakes at the Ethiopian Rif

Polybrominated diphenylethers in the environment - Local and long range transport

Popular Abstract in Swedish För att kunna förstå och bedöma exponeringen av kemikalier i miljön, i det här fallet PolyBromeradeDiphenylEtrar (PBDEer), behövs kunskap om källor och flöden från teknosfären till ekosystemen. PBDEer är bromerade flamskyddsmedel som bl a sätts till olika plastmaterial i elektronikanvändning för att förhindra brand. Det används globalt i miljontals kilo och presenteras I have studied the sources, long range transport, and rates of flow of polybrominated diphenyl ethers (PBDEs), from the technosphere to the Baltic ecosystems. PBDEs are mainly used in polymers, which are applied in electrical equipment to prevent overheating or flashover and are produced in large quantities. PBDEs have become widely spread in the environment, where they are able to accumulate in b

Variability and adaptation in the contractile system of smooth muscle

Popular Abstract in Swedish Det finns tre muskeltyper i människokroppen; skelettmuskler, hjärtmuskler och glatta muskler. Skelettmusklerna är de muskler som gör att vi kan röra oss och andas (mellangärdesmuskeln är en skelettmuskel). Hjärtmuskelcellerna är de som gör att hjärtat slår. Den glatta muskulaturen finns på många ställen i kroppen (t.ex. i blodkärl, luftvägar och livmoder) och utför mångThis thesis examines the cellular and molecular mechanisms involved in the large diversity of the contractile properties in smooth muscle. Six studies, I-VI, are included. I: a slow smooth muscle (aorta) has a different nucleotide and phosphate dependence compared to a fast type (taenia coli). A slow ADP-release can be one mechanism responsible for the lower shortening velocity of aorta. II: treat

Design and disorder : perspectives from science and theology

Artiklarna i denna antologi belyser hur nutida forskningsrön och vetenskaplig diskussion om frågor som kaos och komplexitet, förutsägbarhet och kausalitet, emergens och ordning påverkar traditionella religiösa och vetenskapliga tankar om oförutsägbarhet, slump, ändamål och skapelse. Teologer och naturvetare från sekulär, protestantisk, katolsk och ortodox tradition visar hur ordning och oordning h

Inequality, Institutions, and Change - The Case of Senegal

The chapter studies the relationship between inequality and institutional change in the long-run. The key message is that societies change slowly and unpredictably because of path dependency of economic, political, and social institutions. Prevalent inequalities between different groups rooted in history may help to explain why change does not take place. This has implications for the results that

Role of Lipids in the fate of organochlorine compounds in Aquatic Ecosystems

Both results of laboratory experiments and material collected in the field have shown the lipid composition in organisms to have a significant effect on the bioaccumulation of pollutants and on the lipid steady-state concentrations of pollutants there. The redistribution of persistent organic pollutants which occurs in organisms as a consequence of the depletion of lipid depot, was studied in a po