Search results

The relationship between community structure and growth and pH tolerance of a soil bacterial community was studied after liming in a reciprocal inoculum study. An unlimed (UL) humus soil with a pH of 4.0 was fumigated with chloroform for 4 h, after which < 1 % of the initial bacterial activity remained. Half of the fumigated soil was experimentally limed (EL) to a pH of 7.6. Both the UL and the EL

Solar energy conversion into electricity by photovoltaic modules is now a mature technology. We discuss the need for materials and device developments using conventional silicon and other materials, pointing to the need to use scalable materials and to reduce the energy payback time. Storage of solar energy can be achieved using the energy of light to produce a fuel. We discuss how this can be ach

Coherent multi-cell cooperative transmission, also referred to as coordinated multi-point transmission (CoMP), is a promising strategy to provide high spectral efficiency for universal frequency reuse cellular systems. To report the required channel information to the transmitter in frequency division duplexing systems, limited feedback techniques are often applied. Considering that the average ch

BACKGROUND: Singletons born after IVF have an adverse perinatal outcome when compared with singletons in the general population. This study investigates maternal characteristics and IVF-treatment-related variables, for a possible influence on obstetric outcomes. METHODS: Data from all IVF clinics in Sweden, including all IVF singletons born after fresh treatment cycles and own oocytes during 2002-

Whether the safest roundabout design for cyclists is to separate cycle crossings or integrate cyclists with motorists is an extensively discussed issue. Studies using accident statistics indicate that a separated cycle crossing is the safest for high motor vehicle volumes. However, the results have not been satisfyingly explained. This article combines quantitative and qualitative methods in traff

Popular Abstract in Swedish Urinvägsinfektioner är en av våra vanligaste infektionssjukdommar. De orsakas främst av den Gramnegativa bakterien Escherishia coli. Normalt hålls urinvägarna sterila av ett effektivt försvar med utsöndring av antimikrobiella faktorer i urinen, men även urinflödet i sig är en viktig faktor i försvaret mot infektioner. Vissa bakterier klarar dock att etablera sig trots dIn this thesis we have used P fimbriated E. coli as a model to investigate the mechanisms of bacterial recognition and cell activation by the urinary tract (UT) epithelium. We show that Toll like receptor 4 (TLR4) is crucial for the recognition and host response to P fimbriated E. coli. This response was independent of LPS and did not require CD14. TLR4 was abundant on epithelial cells throughout

Cathodoluminescence (CL) is a very powerful technique for studying the optical properties of semiconductor structures, especially low-dimensional structures (structures with sub-micron features). We will give a number of examples of studies, where CL has been used to study a variety of low-dimensional semiconductor structures. We will also compare the CL technique with other techniques for studies

Popular Abstract in Swedish Njurarnas huvudsakliga funktion i kroppen är att rena blodet från slaggprodukter och reglera vätskebalansen. Hos patienter med nedsatt njurfunktion måste blodet renas på alternativa sätt. Antingen leds blodet ut via slangar till en maskin som renar blodet (hemodialys), eller används bukdialys, så kallad peritoneal dialys (PD). Vid PD häller patienten dialysvätska i bukhIn the present thesis, the quantitative role of active transport (transcytosis) in bulk transvascular protein movement in vivo was evaluated. Using chemical transcytosis inhibition (N-ethylmaleimide (NEM) and filipin), we were able to show that NEM actually increases endothelial permeability to macromolecules, probably as a result of unspecific toxic action on endothelial cells. Filipin, on the ot

Software inspections have shown to contribute improved software quality. However, as they are time consuming; sometimes the resources available are not sufficient to inspect all documents. Instead of selecting documents ad hoc, sample-driven inspections (SDI) is proposed as a systematic approach to select which subset of documents to inspect. The selection is based on a pre-inspection, where sampl

This article describes four types of new elites which have emerged in the post-post-socialism (PPS) period: a local political class, a comprador bourgeoisie of business people or NGO project staff (Euro-elites), a domestic business elite, and in areas of conflict, warlords and mafia chieftains. The four groups of elites compete for the resources and opportunities offered by project society in the

Studien har undersökt vad studenterna i en kurs vid Lunds Tekniska Högskola har tyckt om kamratgranskning och reflektionsuppgifter och om dessa har hjälpt dem i inlärningen av kursämnet. En ansats gjordes att försöka se om en faktisk läreffekt av en reflektionsuppgift hade uppnåtts. Kursutvärderingsresultat, textanalyserade reflektioner samt tentamensresultat har använts i analysen i studien. Stud

Time-varying wave propagation and time-harmonic wave propagation in biisotropic materials are reviewed and the connection between the formulations is established via the temporal Fourier transform. An alternative method to determine the dispersive properties of a bi-isotropic slab from sinusoidal scattering data at normal incidence is presented. A numerical example (realistic, synthetic scattering