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Novel nano-rectifiers based on ballistic electron transport have been fabricated from a high electron-mobility InGaAs/InP wafer. Because of the sufficiently small device size, operations at room temperature are achieved. Furthermore, the devices are shown to work not only up to at least 50 GHz but also with sensitivity to microwave reaching that of the commercial microwave diodes. Based on a simil

In the studies presented in this thesis, hyperpolarized tracers have been used for the study of macroscopic flow and capillary perfusion with magnetic resonance imaging. The feasibility of performing vascular studies using echo-planar imaging (EPI) and hyperpolarized 129Xe was investigated using xenon dissolved in ethanol prior to injection into a flow phantom. It was concluded that hyperpolarized

Popular Abstract in Swedish Avhandlingen består av två delar, den första som behandlar konstruktionen av järn-pulver maskiner, och den andra med analys av ljud från el-maskiner. I Del I, en elektrisk magnetiserad klo-pol synkron maskin på 1.6 kW har byggts. Maskinen är byggt från mjuk magnetisk material (SMC), också kallad järn-pulver. Detta materialet har isotropiska magnetiska egenskaper, som gThis thesis consists of two parts, the first dealing with the design of iron-powder synchronous machines, and the second with the analysis and prediction of the acoustic noise in electrical machines. In Part I, a 1.6 kW electrically magnetized claw-pole machine with magnetically conducting end-plates has been analyzed and a prototype tested. The machine is built from soft magnetic composite mater

Culturable and total bacterial counts, bacterial growth rate and tolerance to pH, as well as microbial biomass, were studied in two coniferous forest soils. The pH had been changed by addition of lime and wood-ash from 4.3-4.4 to 7.0 in one soil and from 3.9-4.4 to 6.1 in the other. Higher total microbial activities and higher bacterial growth rates, measured as soil respiration rate and thymidine

For the 2012 Pedagogical Inspiration Conference for teachers at the Faculties of Humanities and Theology at Lund University, my course team and I presented a paper entitled “Interdisciplinarity, group responsibility and conflict as resources for learning”. The paper discussed our experiences with The City: Boundary Transgressions and Visual Expressions (KOVR02), an interdisciplinary course given i

Popular Abstract in Swedish Undersökningar om hur anhöriga till svårt psykiskt sjuka upplever sin situation är ovanliga i Sverige. Däremot har anhörigas situation oftare uppmärksammats i undersökningar i England och USA. Den moderna samhällsbaserade psykiatrin behöver kunskap om anhörigas situation både för att kunna bedriva en effektiv vård, för att möjliggöra ett optimalt deltagande i vården fråImportant aspects of family burden, participation in care and needs for support among a total of 422 relatives to severely mentally ill patients, voluntarily and compulsorily admitted to hospital, were investigated in a study performed between 1986-1997. The results showed high levels of both external and internal experienced burden among the relatives. The level of burden remained on an almost eq

Popular Abstract in Swedish Signaler om smärta och känsel löper från receptorer ute i kroppen genom olika typer av nervfibrer in till ryggmärgens bakhorn och till trigeminuskärnorna i hjärnstammen. Där kopplas signalerna via synapser vidare till nervceller som leder signalerna upp till hjärnan, så att vi blir medvetna om vad som händer i kroppen. På sin väg till hjärnbarken kopplas signalerna om yThe amino acid glutamate is today regarded as the main fast excitatory neurotransmitter in the central nervous system and a large body of evidence support that glutamate serves as a neurotransmitter in primary afferent terminals in the spinal cord. Previous evidence also suggests that the closely related amino acid aspartate may serve a similar role in some primary afferent terminals. However, the

Popular Abstract in Swedish Vi lever i ett samhälle under ständig utveckling där användandet av nya kemikalier ökar explosionsartat. Med vardagligt användande av avancerade material såsom extremt tunna skärmar, billiga och miljövänliga bekämpningsmedel och läkemedel – vilka ofta är inspirerade av naturens komplexitet – kommer ett behov av organisk syntes. För att tillverka den här typen av komplicThis thesis deals with the development of novel methodologies for the synthesis of hetero- and carbocycles enabled by transition metal catalysis. The second chapter of the thesis describes a gold-catalyzed three-component reaction to form a variety of substituted oxazoles from readily available N-benzylimines, terminal alkynes, and acyl chlorides. Sacrificial benzyl groups are used to merge two o

Desalination can be a cost-effective way to produce fresh water and possibly electricity. The Gaza Strip has had a complex hydro-political situation for many years. Gaza is bordered by the Mediterranean in the west, by Israel in the north and east and by Egypt in the south. Water and electricity consumption in the Gaza Strip is expected to increase in the future due to the increasing population.

Biomolecular solutions and amphiphilic liquid crystals are studied by Nuclear Magnetic Resonance Dispersion (NMRD) and Pulsed-Gradient Spin Echo (PGSE) respectively. A random-flight simulation is performed to obtain the obstructing factors for self-diffusion of small molecules in macrofluids. The accuracy of existing mean-field approximations for the obstruction factors is analyzed. The orientatio

The article deals with stabilisation and regeneration of CeO2 and CeO2/ZrO2 based Pt water gas shift catalysts, subject to high initial deactivation. The reaction gas species effect on the catalyst deactivation was investigated by H2-TPR. Activity measurements enabled the effect of different promoters, some added to the CeO2 based catalysts and some to the CeO2/ZrO2 based Pt catalysts, to be inves

Popular Abstract in Swedish Vår arvsmassa består av en cirka två meter lång tråd av DNA. Denna långa DNA-tråd är väl hoppackad och alla kärnbärande celler i kroppen har en kopia av den. Tråden kan delas upp i korta segment som utgör våra gener och mellanliggande segment vars uppgift inte är helt klarlagd. Totalt har vi enligt nuvarande beräkningar cirka 30 000 gener. Dessa gener, som innehåller koThe aim the thesis work was to study the human cystatins C, E/M, F, G, H and I both in vivo and in vitro. A mouse devoid of cystatin C was used for the cystatin C studies. The levels of cystatins C, E/M and F were measured in pleural effusion samples of patients with various lung disorders. Cystatin F protein and RNA levels were measured in the human haematopoietic cell line U937 as well as in cel