Search results

This paper compares the extraction effectiveness of six different commonly applied extraction techniques for the determination of PCBs in soil. The techniques included are Soxhlet, Soxtec, ultrasonication extraction, supercritical fluid extraction, microwave-assisted extraction and accelerated solvent extraction. For none of the techniques were the extraction conditions optimized, but instead the

Flow cytometric assessments of DNA ploidy status and the S-phase fraction (SPF) have been shown to yield prognostic information in breast cancer. The aim of the present investigation was to elucidate the reproducibility of results with regard to tumor DNA heterogeneity, and to ascertain whether the prognostic value of DNA measurements might be enhanced by analyzing two pieces of a tumor instead of

Popular Abstract in Swedish Denna avhandling behandlar statiska och dynamiska lagbeslutsproblem i både stokastiska och deterministiska ramverk. Lagproblemet är ett kooperativt spel, där ett antal spelare utgör ett lag som försöker optimera en given kostnad inducerad av omvärldens osäkerhet. Osäkerheten kan modelleras antingen som stokastisk, vilket ger upphov till det stokastiska lag problemet, elThis thesis considers static and dynamic team decision problems in both stochastic and deterministic settings. The team problem is a cooperative game, where a number of players make up a team that tries to optimize a given cost induced by the uncertainty of nature. The uncertainty is modeled as either stochastic, which gives the stochastic team problem, or modelled as deterministic where the team

To establish relationships between soil phosphorus (P) fractions and leaf P, a mycorrhizal species (Plantago lanceolata L.) was compared with a typically non-mycorrhizal species (Rumex acetosella L.) in a glasshouse experiment. The plants were grown in 40 soils from non-fertilised, abandoned pastures or abandoned arable fields and leaf P concentration were found to be related to various soil P fra

Popular Abstract in Swedish Denna avhandling behandlar periodiska strukturer som används som frirymdsfilter för elektromagnetiska vågor. Två typer av periodiska strukturer behandlas, nämligen så kallade frekvensselektiva ytor (FSS) och artificiella puck strukturer (APP). En FSS består av en eller flera periodiska gitter av identiska element som är inbäddade i ett godtyckligt antal dielektriska skiThis dissertation deals with periodic structures that are used as free-space electromagnetic filters. Two types of periodic structures are treated, namely the so called frequency selective surface (FSS) and the artificial puck plate (APP) structure. The FSS structure consists of one or several periodic arrays of identical elements embedded in an arbitrary number of dielectric layers. The APP struc

This study investigated attendance of treatment and follow-up characteristics in two samples of suicide attempters with different lengths of follow-up, that is after one month and after three months. They did not differ initially. After one month, most of the treatment non-attenders (32%) had not yet established an outpatient contact after inpatient treatment, while after three months, 38% of the

Effects of polyamines on the spontaneous mechanical and electrical activity of guinea-pig intestinal smooth muscle were studied. Spermine and spermidine inhibited action potential generation and contractions, while putrescine had no effect. Single smooth muscle cells were isolated from the longitudinal muscle layer of the guinea-pig ileum. Whole-cell voltage-clamp experiments were carried out to i

D. Briihl and A. W. Inhoff (1995) found that exterior letter pairs showed no privileged status in reading when letter pairs were presented as parafoveal primes. However, T. R. Jordan, S. M. Thomas, G. R. Patching, and K. C. Scott-Brown (2003) used a paradigm that (a) allowed letter pairs to exert influence at any point in the reading process, (b) overcame problems with the stimulus manipulations u

Aiming for better understanding of the large complexity of excited-state processes in carotenoids, we have studied the excitation wavelength dependence of the relaxation dynamics in the carotenoid zeaxanthin. Excitation into the lowest vibrational band of the S-2 state at 485 nm, into the 0-3 vibrational band of the S2 state at 400 nm, and into the B-2(u)+ state at 266 nm resulted in different rel

Background: During the last 20 years both in vitro and in vivo models have been developed for studies of the cell killing characteristics of low energy electrons, e.g. Auger electrons. This thesis deals with radiobiological effects of radiation from indium isotopes in V79 cells in vitro (Paper I-III) and the rat testis in vivo (Paper IVV). The focus has mainly been on studies of the accuracy and

Alteration of the transforming growth factor beta (TGFB) signalling pathway is important in pancreatic carcinogenesis, as shown by the frequent inactivation of the downstream target SMAD4. We recently analysed a series of pancreatic carcinoma cell lines with respect to alterations of five SMAD genes involved in TGFB signalling, and showed that SMAD4 was structurally rearranged in 42% of these. Thi

The calcium-releasing second messenger inositol 1,4,5-trisphosphate is involved in the regulation of stomatal aperture by ABA. In other signalling pathways, inositol 1,4,5-trisphosphate is generated by the action of phospholipase C. We have studied the importance of phospholipase C in guard cell ABA-signalling pathways. Immunolocalisation of a calcium-activated phospholipase C confirmed the presen

Wei G, Bergquist A, Broome U, Lindgren S, Wallerstedt S, Almer S, Sangfelt P, Danielsson A, Sandber-Gertzen H, Loof L, Prytz H, Bjomsson E (Sahlgrenska University Hospital, Gothenburg; Karolinska University Hospital, Huddinge, Stockholm; University Hospital MAS, Malmo; University Hospital, Linkoping; University Hospital, Uppsala; University Hospital, Umea; University Hospital, Orebro; Central Hosp

Rapid anthropogenic climate change is already affecting species distributions and ecosystem functioning worldwide. We applied niche-based models to analyse the impact of climate change on tree species and functional diversity in Europe. Present-day climate was used to predict the distributions of 122 tree species from different functional types (FT). We then explored projections of future distribu