Natural radiative lifetimes of eight levels in Tm m were measured with the time-resolved laser-induced fluorescence (LIF) technique. Free doubly ionized thulium ions were obtained in a laser-produced plasma. Three even-parity levels were excited from the ground state with one-photon excitation, using a laser system generating pulses of 1 ns duration. Five odd-parity levels were excited from the gr

Studien utgör en del i ett tvärvetenskapligt forskningsprogram, ¯Effekthushållning i byggnader¯, genomfört vid Lunds Universitet. Den här studien har fokuserat energianvändning i bostäder ur ett kulturanalytiskt perspektiv. Detta har inneburit ett åskådliggörande av möten mellan bransch och brukare på den omreglerade elmarknaden. Här har vardagslivet varit en metodisk och analytisk utgångspunkt fö

B-cell development into antibody producing cells is a complex process that relies on the tightly controlled production of hundreds of genes and proteins. A B-cell is activated through the B-cell receptor (BCR) and this activation is modified by different co-stimulatory or inhibitory co-receptors. The concerted action of signals from BCR and from co-receptors decides the fate of the B-cells. The ma

The role of percutaneous renal tumour biopsy (RTB) remains controversial due to uncertainties regarding its diagnostic accuracy and safety.

All scientific research requires problem definition and discipline, as well as concept and method formation. However, from a human point of view the most important problems are probably those found in areas where it may be difficult to provide such ideal research conditions. Rehabilitation engineering and design research is one such field. Nonetheless, we believe that these theory and method forma

The transport and gain properties of quantum cascade (QC) structures are investigated using a nonequilibrium Green's function (NGF) theory which includes quantum effects beyond a Boltzmann transport description. In the NGF theory, we include interface roughness, impurity, and electron-phonon scattering processes within a self-consistent Born approximation, and electron-electron scattering in a mea

The nonreceptor tyrosine kinase Src binds to and is activated by the beta-receptor for platelet-derived growth factor (PDGF). The interaction leads to Src phosphorylation of Tyr934 in the kinase domain of the receptor. In the course of the functional characterization of this phosphorylation, we noticed that components of 136 and 97 kDa bound to a peptide from this region of the receptor in a phosp

Background and Objectives: The prevalence of back pain and its effect on function and health-related quality of life across three levels of lower limb amputation secondary to trauma or tumour was studied. Study design: Cross-sectional survey. Methods: Forty-six lower limb amputees, aged 19-78 years, participated. The Roland Morris disability questionnaire (RMDQ) and the short form 36 health survey

The use of this material under current use conditions is supported by the existing information. This material was evaluated for genotoxicity, repeated dose toxicity, developmental toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity, skin sensitization potential, as well as, environmental safety. Repeated dose toxicity was determined to have the most conservative systemic exp

Accelerator based lightsources are one of the most powerful tools today for producing high intensity radiation at very short wavelengths. While synchrotron storage rings provide a high average brilliance in a wide wavelength range, the next generation of lightsources aim towards producing ultra-short pulses in the X-ray regime. A very promising technique implemented or proposed at many accelerat