Real-space collective excitation dynamics in molecular aggregates is studied using a model where the electronic system is described via exciton theory with surface hopping. The nuclear dynamics are included using the Langevin equation where temperature and zero-point motions are entered via the fluctuation-dissipation theorem. Dynamic processes like exciton relaxation, localization, polaron format

OBJECTIVES: To obtain knowledge on male reproductive toxicity of inorganic lead at current European exposure levels and to establish lowest adverse effect levels, if any. METHODS: A cross sectional survey of the semen of 503 men employed by 10 companies was conducted in the United Kingdom, Italy, and Belgium. The mean blood lead concentration was 31.0 microg/dl (range 4.6-64.5) in 362 workers expo

Inhibitors of adenosine diphosphoribosyl transferase, like nicotinamide, 3-aminobenzamide and other analogues, can inhibit repair of radiation-induced sublethal and/or potentially lethal damage in some in vitro systems. Therefore, we have tested the effect of nicotinamide on repair parameters in vivo in two rodent normal tissues. In skin, the sensitivity to dose fractionation (1, 2, 5 or 10 X-ray

Photosynthetic water oxidation catalyzed by Photosystem II takes place at a site that comprises a redox-active tyrosine, YZ, a tetramanganese cluster, and, in addition to its redox components, two inorganic cofactors, calcium and chloride. Recent work suggests that YZ and the metal site are intimately linked in the oxidation and deprotonation reactions of substrate water. The metal cluster stores

Popular Abstract in Swedish Denna avhandling riktar sig till läsare som har ett särskilt intresse i de baltiska staterna såväl som i demokratiseringsfrågor, postkommunism och medborgarskap. Författaren analyserar utvecklingen av medborgarskap i de baltiska länderna under sovjettiden samt sedan återupprättandet av självständigheten 1990. Teoretiskt vilar analysen på en kritisk granskning av de tre This book speaks to readers with a particular interest in the Baltic states as well as to those with a broader interest in post-communist democratization and citizenship. The notion of citizenship has not been prominent in academic perspectives on post-communism. This study aims at bringing citizenship back into these perspectives. Starting from the idea that citizenship is both a condition of de

An algorithm is presented in which the Colour-Dipole Cascade Model as implemented in the ARIADNE program is corrected to match the fixed order tree-level matrix elements for e(+)e(-) --> n jets. For the results presented here, matrix elements were used up to second order in alpha(S) but the scheme is applicable also for higher orders.

Popular Abstract in Swedish Syftet med denna studie var att kartlägga kvinnligt skolledarskap. En enkät sän-des till 235 kvinnliga rektorer. Av dem hade 204 tjänst som skolledare under den tid då undersökningen genomfördes och 173 av dem besvarade enkäten. Det externa bortfallet var alltså ca 15 procent. I den fortsatta framställningen avses med bortfall det interna. Nedan ges en sammanfattning avThe purpose of this study was to chart the situation of women principals. By the time the in-vestigation was made the whole amount of women principals in compulsory school was about 16 percent (90/91). Of 235 contacted women, 204 were serving as principals. 173 responded which means 85 percent. The study shows that responsibility rationality are important in women principals' work. They look afte

3-Hydroxypropionic acid was isolated by bioactivity-guided fractionation of extracts obtained from submerged cultures of several endophytic fungi isolated from above-ground plant organs. This compound showed selective nematicidal activity against the plant-parasitic nematode Meloidogyne incognita with LD50 values of 12.5-15 mug/ml. Activity against the saprophytic Caenorhabditis elegans was fivefo

An improved ELISA method for the detection of Staphylococcal. Enterotoxin B (SEB) in protein A preparations is presented. Fab fragments were obtained by digestion with papain of anti-SEB IgG bound to SEB immobilized on Sepharose 4B. Anti-SEB and peroxidase-labeled Fab fragments from secondary antibodies were successfully used in a modified ELISA of SEB in protein A preparations. SEB-Sepharose was

Objective: To identify the reasons and their relative importance why medicines are returned to Swedish pharmacies unused. Setting: A random sample of the pharmacies in Sweden. Method: Interviews using a semi-structered interview form with pharmacy customers returning unused medicines to the pharmacy. Main outcome measure: Reasons given by patients/relatives/carers for returning unused medicines to

Associations with functional groups of natural organic matter (NOM) are of great importance for bioavailability, toxicity, and mobility of trace metals in soils and waters. In this study, the coordination chemistry of copper, Cu(II), in organic soils and dissolved organic matter (DOM) from soils and streams was investigated by extended X-ray absorption fine structure (EXAFS) spectroscopy. In both