In many species, population sex ratios have far-reaching consequences for a wide variety of population-level and behavioural processes and can directly influence sexual selection through differential effects on male and female mating behaviour. Although sex ratios are often treated as more or less stable population characteristics, recent theoretical evidence suggests that sex ratios fluctuate und

Kommentarer till nytryck av Axel Wallengrens essä "En studentkarneval" (ursprungligen tryckt i kalendern Nornan 1896).

Reduction in the amount of ammonia in fuel gas from biomass gasification was studied. Experiments were carried out in a fixed-bed reactor dt 200-1000 degrees C, 21 atm. A kinetic model for ammonia decomposition was developed. The partial pressure of hydrogen in the fuel gas was a key factor to model ammonia decomposition. Activation energies in the empty reactor, on carbon, and in a sand bed were

Context: The use of levothyroxine to reduce thyroid size in pediatric patients with goiter due to chronic autoimmune thyroiditis (AIT) remains controversial. In overtly hypothyroid patients, reductions in thyroid volume have been reported, whereas the effect in subclinically hypothyroid and euthyroid patients is less clear. Objective: The objective of the study was to evaluate the effect of levot

Apoptosis is characterized by a lack of inflammatory reaction in surrounding tissues, suggesting local control of complement activation. During the initial stage of apoptosis, cells expose negatively charged phospholipid phosphatidylserine on their surfaces. The vitamin K-dependent protein S has a high affinity for this type of phospholipid. In human plasma, 60-70% of protein S circulates in compl

Filmrecension av Kathryn Bigelows K–19: The Widowmaker.

Two groups of Mongolian gerbils (Meriones unguiculatus) were continuously exposed to 150 ppm trichloroethylene (TCE) for 77 and 106 d, respectively. The behavior of the animals was tested in a symmetrical maze baited with sunflower seeds during a period of 23 d, beginning at the end of exposure. One additional group was exposed for 150 d and then allowed 40 d free from exposure before the start of

A new 250 MeV energy electron pulse-stretcher mode is designed where the MAX I ring is injected from a new linac system (Nucl. Instr. and Meth. A 490 (2002) 592). For the new slow extraction, we will try to achieve a lower emittance in the extraction plane by using a different extraction method. Injection and slow extraction are simulated.

This doctoral dissertation is based on five appended papers primarily concerned with three main topics, namely: the functional characterization of specific and clinically relevant perturbations found in BRCA1 ? one of the major breast cancer susceptibility genes; the use of microarray technologies for molecular characterization of hereditary breast tumor samples from a genomic perspective; and fin

Abstract is not available

Exercise-induced rib stress fractures have been reported frequently in elite rowers during the past decade. The etiology of rib stress fractures is unclear, but low bone mineral density (BMD) has been suggested to be a potential risk factor for stress fractures in weight-bearing bones. The present study investigated BMD in seven Danish national team rowers with previous rib stress fracture (RSF) a

This report contains a short overview over the ongoing research and teaching activities of the PhD-students of the Department of Automatic Control, Lund University, in 2002.

The Mesolithic burial from Barum in Northeastern Scania has long been a subject of academic controversy regarding both the age of the burial and the sex assessment of the remains. A less public discussion has taken place regarding the initial position of the body in the burial. In this article, the documentation of the burial is analyzed in detail according to the taphonomic principles of anthropo

How can school influence the viewpoints students hold on aids and sex?The investigation focused on teaching the subject of aids and sex to secondary school students in grades e ght throug eleven. Thirteen teachers and their students, in 15 different c1asses, were studied and compared with a control group; altogether 548 students were included in the investigation.The aim of the study was to determHow can schools influence the viewpoints students hold on aids and sex? The investigation focused on teaching the subject of aids and sex to secondary school students in grades eight through eleven. Thirteen teachers and their students, in 15 different classes, were studied and compared with a control group; altogether 548 students were included in the investigation. The aim of the study was to de

A sparse mesh-neighbour based approximate inverse preconditioner is proposed for a type of dense matrices whose entries come from the evaluation of a slowly decaying free space Green's function at randomly placed points in a unit cell. By approximating distant potential fields originating at closely spaced sources in a certain way, the preconditioner is given properties similar to, or better than,