Solid particles in protoplanetary discs can grow by direct vapour deposition outside of ice lines. The presence of microscopic silicate particles may nevertheless hinder growth into large pebbles, since the available vapour is deposited predominantly on the small grains that dominate the total surface area. Experiments on heterogeneous ice nucleation, performed to understand ice clouds in the Mart

The antibiotic fusidic acid (FA) targets elongation factor G (EF-G) and inhibits ribosomal peptide elongation and ribosome recycling, but deeper mechanistic aspects of FA action have remained unknown. Using quench flow and stopped flow experiments in a biochemical system for protein synthesis and taking advantage of separate time scales for inhibited (10 s) and uninhibited (100 ms) elongation cycl

Translational GTPases (trGTPases) are involved in all four stages of protein biosynthesis: initiation, elongation, termination and ribosome recycling. The trGTPases Initiation Factor 2 (IF2) and Elongation Factor G (EF-G) respectively orchestrate initiation complex formation and translocation of the peptidyl-tRNA:mRNA complex through the bacterial ribosome. The ribosome regulates the GTPase cycle

During the stringent response, Escherichia coli enzyme RelA produces the ppGpp alarmone, which in turn regulates transcription, translation and replication. We show that ppGpp dramatically increases the turnover rate of its own ribosome-dependent synthesis by RelA, resulting in direct positive regulation of an enzyme by its product. Positive allosteric regulation therefore constitutes a new mechan

This theoretical work covers structural and biochemical aspects of nucleotide binding and GDP/GTP exchange of GTP hydrolases belonging to the family of small GTPases. Current models of GDP/GTP exchange regulation are often based on two specific assumptions. The first is that the conformation of a GTPase is switched by the exchange of the bound nucleotide from GDP to GTP or vice versa. The second i

“Something is going on in Pauline studies,” Paula Fredriksen said of the recent emergence of the “Paul within Judaism” (PWJ) perspective. Almost in parallel, Messianic Judaism has entered the religious scene. One a scholarly and the other a religious community, they both make the same claim: Paul was—and remained—a Jewish believer in Jesus. Hence, both communities propose reading the New Testament

Background: As the volume of surgical cases in low-and middle-income countries (LMICs) increases, surgical-site infections (SSIs) are becoming more prevalent with anecdotal evidence of antimicrobial resistance (AMR), despite a paucity of data on resistance patterns. Objectives: As a primary objective, this prospective study aimed to describe the epidemiology of SSIs and the associated AMR among wo

Tidigare forskning har visat att störda ätbeteenden (disordered eating/DE) är vanligt bland ungdomar, särskilt bland tonårsflickor. DE definieras som olika beteenden (t.ex. kräkningar, restriktivt ätande) och negativa attityder till ätande/kroppsform/utseende/vikt. Avhandlingen hade flera syften. (1) Att validera en svensk version av frågeformuläret RiBED-8 (risk behaviour for eating disorders) soPrevious research has described that disordered eating (DE) is common in adolescents, especially in girls. DE is defined as maladaptive behaviours (e.g., vomiting) and negative attitudes toward eating and one’s body shape, appearance, and weight. The present thesis had several aims. First, to validate a Swedish version of a Danish 8-item screening inventory, Risk Behaviour for Eating Disorders/RiB

The streaming instability provides an efficient way of overcoming the growth barriers in the initial stages of the planet formation process. Considering the realistic case of a particle size distribution, the dynamics of the system is altered compared to the outcome of single size models. In order to understand the outcome of the multispecies streaming instability in detail, we perform a large par

The alarmone nucleotides guanosine pentaphosphate (pppGpp) and tetraphosphate (ppGpp), collectively referred to as (p)ppGpp, are key regulators of bacterial growth, stress adaptation, antibiotic tolerance and pathogenicity. We have recently shown that the Small Alarmone Synthetase (SAS) RelQ from the Gram-positive pathogen Enterococcus faecalis has an RNA-binding activity (Beljantseva et al. 2017)

Background: The majority of childhood cancer survivors are at risk of treatment-related adverse health outcomes. Survivorship care to mitigate these late effects is endorsed, but it is not available for many adult survivors of childhood cancer in Europe. The PanCareFollowUp project was initiated to improve their health and quality of life (QoL) by facilitating person-centred survivorship care. Met

The transport and oxidation of glucose, the content of fructose 1,6-diphosphate, and the release of insulin were studied in microdissected pancreatic islets of ob/ob mice incubated in Krebs-Ringer bicarbonate medium. Under control conditions glucose oxidation and insulin release showed a similar dependence on glucose concentration with the steepest slope in the range 5-12mm. The omission of Ca(2+)

The challenges of sustainable development require whole supply chains and networks to drive change and innovation. However, most existing research on sustainable innovations is on a company level and the dominating company focus in practice drives “silo” approaches, short-term thinking, and profit maximization. Consequently, there is a need for research and new models that facilitate sustainable sThe challenges of sustainable development require whole supply chains and networks to drive change and innovation. However, most existing research on sustainable innovations is on a company level and the dominating company focus in practice drives “silo” approaches, short-term thinking, and profit maximization. Consequently, there is a need for research and new models that facilitate sustainable s