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Partiklar i atmosfären påverkar klimatet

Partiklar i atmosfären – aerosoler – har en avkylande effekt på jordens klimat. Aerosolernas sammanlagda effekt bedöms i IPCCs femte stora rapport, AR5, som något mindre än vad som rapporterades i 2007 i AR4. Partiklars avkylande effekt har troligen i viss mån motverkat växthusgasutsläppens uppvärmande påverkan. Vi kan dock inte förlita oss på sådan draghjälp i klimatarbetet. Internationella övere

Serum tau fragments as predictors of death or poor neurological outcome after out-of-hospital cardiac arrest

Background: Anoxic brain injury is the primary cause of death after resuscitation from out-of-hospital cardiac arrest (OHCA) and prognostication is challenging. The aim of this study was to evaluate the potential of two fragments of tau as serum biomarkers for neurological outcome. Methods: Single-center sub-study of 171 patients included in the Target Temperature Management (TTM) Trial randomly a

Lipases have similar water activity profiles in different reactions

The shape of the profiles of enzyme activity versus water activity for four different lipases were independent of the reaction used to determine the activity. The profile for each lipase (Rhizopus arrhizus, Pseudomonas sp., Candida rugosa and Lipozyme) in esterification, hydrolysis and transesterifications profiles were the same. In transesterification the yield was unaffected by the water activit

Molecular design and synthesis of hydroxide ion exchange membranes carrying alicyclic quaternary ammonium cations

Significantresearch efforts are currently directed towards the synthesis and studies of durable anion exchange membranes (AEMs) with the aim to develop alkaline fuel cells and electrolyzers able to operate efficiently without platinum-groupmetal catalysts [1]. The grand challenge is to identify and synthesize polymeric AEM materials possessingthe necessary chemical and thermal stability. Studies o

Computerised perimetry

During the last few years computerised perimetry has become a clinical reality. This new technique eliminates the operator's error, ensures reproducibility of test procedures and parameters and makes visual field testing of large numbers of patients possible. Great differences exist between computerised perimeters. Differences in hardware for example, the way in which stimuli or field charts are p

Association between changes in molecular biomarkers of cartilage matrix turnover and changes in knee articular cartilage : a longitudinal pilot study

Background: An early detection of Osteoarthritis is urgently needed and still not possible until today. The aim of the study was to assess whether molecular biomarkers of cartilage turnover are associated with longitudinal change in knee cartilage thickness during a 2 year period in individuals with increased risk of developing knee osteoarthritis. A secondary aim was to assess whether prior knee

Nociceptive C fibre input to the primary somatosensory cortex (SI). A field potential study in the rat.

In the present study, noxious thermal stimulation of the skin with short pulses of CO2-laser radiation was used to identify a cutaneous nociceptive C fibre input to SI and investigate the organization of this input in halothane-nitrous oxide anaesthetized rats. Noxious CO2-laser stimulation of the glabrous skin of the hindpaw consistently evoked late surface positive field potentials in SI (averag