Sökresultat

Filtyp

Din sökning på "*" gav 529674 sökträffar

ApoAI-derived peptide increases glucose tolerance and prevents formation of atherosclerosis in mice

AIMS/HYPOTHESIS: Finding new treatment alternatives for individuals with diabetes with severe insulin resistance is highly desired. To identify novel mechanisms that improve glucose uptake in skeletal muscle, independently from insulin levels and signalling, we have explored the therapeutic potential of a short peptide sequence, RG54, derived from apolipoprotein A-I (ApoA-I).METHODS: INS-1E rat cl

Mass-consumption as an activator of sustainable consumerist potentials

This chapter focuses on the relation between mass-consumption and sustainable consumption.Mass-consumption concerns the omnipresent role of consumption in contemporary societieswith its problems of excessive resource use in current practices of consumption. The latemodern context and forces of mass-consumption can both trigger and prevent sustainableconsumption as well as shape its outcome. Throug

Glycogen metabolism is impaired in the brain of male type 2 diabetic Goto-Kakizaki rats

Diabetes impacts the central nervous system predisposing to cognitive decline. While glucose is the main source of energy fueling the adult brain, brain glycogen is necessary for adequate neuronal function, synaptic plasticity and memory. In this study, we tested the hypothesis that brain glycogen metabolism is impaired in type 2 diabetes (T2D). 13 C magnetic resonance spectroscopy (MRS) during [1

Status of MAX IV linac beam commissioning and performance

The MAX IV linac is used both for injection into a 3 GeV storage ring, and as a high brightness driver for a Short Pulse Facility (SPF). It has also been deigned to handle the high demands of an FEL injector. The linac is now routinely injecting into the two storagerings, and commissioning work is focused towards delivering high brightness pulses to the SPF. In this paper we present results from c

Validation of very high cloud droplet number concentrations in air masses transported thousands of kilometres over the ocean

The microstructure of orographic clouds related to the aerosol present was studied during the second Aerosol Characterisation Experiment (ACE-2). Very high cloud droplet number concentrations (almost 3000 cm -3 ) were observed. These high concentrations occurred when clouds formed on a hill slope at Tenerife in polluted air masses originating in Europe that had transported the order of 1000 km ov

Analyzing atmospheric trace gases and aerosols using passenger aircraft

CARIBIC (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container) resumed regular measurement flights with an extended scientific payload in December 2004. After an automated measurement container was successfully deployed on intercontinental flights using a Boeing 767 from 1997 to 2002, a far more powerful package now is deployed using a new Airbus A340‐600

Fine mode particulate sulphur in the tropopause region measured from intercontinental flights (CARIBIC)

Here the first systematic study of the concentration of particulate sulphur in the upper troposphere and lower stratosphere is presented. The measurements were undertaken in the CARIBIC programme during intercontinental flights from a commercial aircraft, which was equipped with an aerosol inlet and a research payload in the cargo bay. Aerosol samples were collected and analysed for elemental comp

Blended learning för utveckling av lärarkompetens

Vad är blended learning? Hur kan lärares kompetens inom blended learning utvecklas? Och hur kan blended learning i sin tur främja utvecklingen av pedagogisk kompetens? I denna rapport redovisas det pedagogiska utvecklingsprojektet Blended learning för utveckling av lärarkompetens som belyser och diskuterar dessa frågor. Projektets avsikt har varit att utveckla, introducera och analysera effekterna

Methodology to estimate the transfer function of individual differential mobility analyzers

A method to estimate the nonideal features of the transfer function of individual differential mobility analyzers (DMA) was developed and tested experimentally. This was up to now an unsolved problem, which is important for the precision in DMA measurements. The method involves three DMAs of unknown characteristics, which are used in three rounds of experiments with two DMAs according to a fixed s

MAX IV Photocathode Gun Laser System Specification and Diagnostics

The MAXIV injector has two guns - a thermionic used for ring injections, and a photocathode used for short pulse facility operation. A commercial Ti:sapphire laser from KMLabs drives the copper based photocathode gun. It has been running without major issues for more than 3 years. The laser delivers up to §I{500}{\textmu J} on the cathode at the third harmonic, §I{263}{nm}, via a vacuum laser tran

Pulse shaping at the MAX IV photoelectron gun laser

A motivation for the development of a versatile, programmable source of shaped picosecond pulses for use in photocathode electron gun preinjectors is presented. We present the experimental setup for arbitrary longitudinal pusle shaping of the MAX IV photocathode gun laser. The setup consists of a grating-based Fourier-domain shaper capable of stretching the pulses directly in the UV domain. Prelim

The New MAX IV Gun Test Stand

The gun test stand from MAX-Lab has been upgraded and moved to a new facility at the MAX IV Laboratory. The new test stand will reuse parts of the equipment from the old test stand but a number of improvements to the setup are be made. In this paper we report on the design of the new gun test stand, research plans in the near future as well as planned and possible future research topics..

Emittance improvements in the MAX IV photocathode injector

The MAX IV injector design predicts a beam with 100 pC of charge and an emittance lower than 1 mm mrad. The photocathode pre-injector is based on the now close to standard 1.6-cell gun adapted to 2.9985 GHz, in combination with a Ti:Sapphire laser system. This system reaches the requirements of the injector operation for the SPF, but can be tuned beyond specifications to open up new operation mode

Modelling cloud processing of aerosol during the ACE-2 HILLCLOUD experiment

A numerical model has been used to simulate the conditions observed during the ACE-2 Hillcloud experiment and to study the processes which may be taking place. The model incorporates gas phase chemistry of sulphur and nitrogen compounds upstream of the cloud, and the interaction of aerosol, precursor trace gases and oxidants within the cloud. Gas phase and aerosol inputs to the model have been pro

Hygroscopic properties of aerosol particles in the northeastern Atlantic during ACE-2

Measurements of the hygroscopic properties of sub-micrometer atmospheric aerosol particles were performed with hygroscopic tandem differential mobility analysers (H-TDMA) at 5 sites in the subtropical north-eastern Atlantic during the second Aerosol Characterization Experiment (ACE-2) from 16 June to 25 July 1997. Four of the sites were in the marine boundary layer and one was, at least occasional

ACE-2 HILLCLOUD. An overview of the ACE-2 ground-based cloud experiment

The ACE-2 HILLCLOUD experiment was carried out on the island of Tenerife in June-July 1997 to investigate the interaction of the boundary layer aerosol with a hill cap cloud forming over a ridge to the north-east of the island. The cloud was used as a natural flow through reactor to investigate the dependence of the cloud microphysics and chemistry on the characteristics of the aerosols and trace