A strategy for feedback control of the glucose feed rate in cultivations of E.coli is discussed. By making probing pulses in the feedrate it is possible to detect and avoid undesirable by-productformation using a standard dissolved oxygen sensor. The feasibility of an improved and simplified probing algorithm is demonstrated by simulations as well as laboratory-scale experiments.

Redogörelse för ätten Cedercreutz uppkomst och koppling till ätten Tersmeden med särskild tonvikt på riksrådet Herman Cedercreutz, född Tersmeden.

Popular Abstract in English All living things somehow communicate with each other. Cell-to-cell communication, or signalling, occurs on the molecular level, regulating the body’s activities and coordinating various cell actions and is thereby valuable for realizing cell as well as system functions. Errors in the cellular transferred information may induce diseases such as cancer and autoimmune disGlypicans are multifunctional cell surface heparan sulphate proteoglycans co-regulating numerous signalling pathways, and are thereby involved in the control of cellular division, differentiation, and morphogenesis. The heparan sulphate (HS) chains are responsible for many of those biological functions; nevertheless recent studies suggest functional roles for the glypican core proteins in mediatin

The heavy recession in Sweden during the first half of the nineties led to a very difficult situation for young people with a weak position on the labour market. Around a third of the youths born in the mid seventies had received social welfare benefits before the age of 24. Despite the recovery in the Swedish economy a group of young adults, now in their thirties, simply can not find a way to eit

Popular Abstract in Swedish Växters fenologi påverkar ekosystemens funktion och tjänster, och återkopplar till klimatet genom att påverka utbytet av kol, vatten och energi mellan atmosfär och ekosystem. Under de senaste decennierna har växternas fenologi studerats i allt större omfattning, men fortfarande är osäkerheten stor och enighet saknas om klimatets inverkan på fenologi och förändringar övePlant phenology exerts major influences on carbon, water, and energy exchanges between atmosphere and ecosystems, provides feedbacks to climate, and affects ecosystem functioning and services. Great efforts have been spent in studying plant phenology over the past decades, but there are still large uncertainties and disputations in phenology estimation, trends, and its climate sensitivities. This

A modified version of the delayed single-photon self-interference experiment is performed using a sample of Pr:Y2SiO5 for detecting the interference pattern. Instead of using a beam splitter and two spatially separated paths for the light to travel towards the material, acousto-optic modulators are used to create two light pulses and let the pulses travel along the same path towards the material.

This review contains an overview of strong interaction effects in weak decays starting with a historical introduction. It contains a short overview of semileptonic decays and their relevance for measuring CKM matrix elements. The main part is devoted to the theoretical calculation on nonleptonic matrix elements relevant for K0-K0bar mixing and K to pi pi decays. It concludes with a short summary o

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Different aspects of the strong interaction in particle collisions are studied. Most of the work is based on the Lund string fragmentation model for hadron production. A model which incorporates interference between identical bosons in the string model is presented. With this model the consequences for the Bose-Einstein effect are investigated in detail. What happens at the end of the QCD cascades