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This communication addresses a simple question by means of density functional calculations: Why is iron used as the metal in. iron-sulfur clusters? While there may be several answers to this question, it is shown here that one feature - the well-defined inner-sphere reorganization energy of self-exchange electron transfer - is very much favored in iron-sulfur clusters as opposed to metal substitut
The pH- and the temperature dependence of the rate constant for electron transfer from tyrosine to ruthenium in Ru(II)(bpy)2(4-Me-4'CONH-L-tyrosine etyl ester-2,2'-bpy) 2PF6 was investigated using flash photolysis. At a pH below the tyrosine pKa 10 the rate constant increased monotonically with pH. This increase was consistent with a concerted electron transfer/deprotonation mechanism. Also indica
We report on a theoretical study of the electronic structure of [100]-oriented free-standing III-V semiconductor nanowires with quadratic (square wire) and rectangular (nanobelt) cross-sections based on an atomistic tight-binding approach. It is shown that at the same cross-section aspect ratio, the characteristics of the band structure and state wave functions of the nanowires in the vicinity of
This article concerns the rotation-translation hypothesis. Oscillations in pattern dynamics are shown to produce perspective transformations of motifs and themes. At the kinematic level, this condition has made it possible to extract different perspective orientations. As a result, it is shown that motifs carry intentional cues and locate structurally the observer’s thematic orientation. Since the
Recension av Pierre Nora (ed.), Realms of Memory I-III.
We present a qualitative physical model of the origin of two very brightUV lines of Fe II at 2507-2509 Å, present in high-resolutionspectra of gaseous condensations (blobs) close to the central star ofeta Carinae. The spectra have been obtained with the Hubble SpaceTelescope (HST). The model is based on a type of Bowen mechanism withselective photoexcitation of Fe II by a broad HLyalpha profile,ge
Continuous supermacroporous chromatographic columns with anion-exchange ligands [2-(dimethylanlino)ethyl group] and immobilized metal affinity (IMA) ligands (Cu2+-loaded iminodiacetic acid) have been developed allowing binding of Escherichia coli cells and the elution of bound cells with high recoveries. These poly(acrylamide)-based continuous supermacroporous columns have been produced by radical
Adolescents reporting selling sex for payment were studied with respect to socioeconomic background, perceived mental health and health behavior, antisocial behavior, sexual experiences, including sexual abuse and abusive behaviors, and the use of pornography. The sample consisted of a representative sample of 4,339 students (response rate, 77.2%) from the third year of upper secondary schools in
While many mutations thought to result in protein S (PS) deficiency are known. there have been few attempts to relate genotype expression with plasma phenotype. We have investigated the nature and consequence of PS gene (PROS 1) mutations in 17 PS-deficient families who presented with mixed type I and type III phenotypes. Seven different mutations were found in nine families: delG-34 (STOP codon a
Popular Abstract in Swedish ?Överbrygga det kommunikativa gapet mellan personer med en demenssjukdom och deras vårdare. Ett omvårdnadsperspektiv? En problematik i omvårdnaden av personer med långt framskriden demenssjukdom är hur vårdare skall tolka och förstå den demensdrabbade så att omvårdnaden kan anpassas till dennes behov. Forskning tyder på att vissa reaktioner, bland annat aggressiva handThe aim was to explore possible areas and sources that could inform the care for people with dementia. These were the people with dementia themselves, nurses reflective discussions about caring, nurse-patient interaction together with information from close family members, and the previous personality and sense of coherence of people with dementia in relation to behaviour during the disease as rel
Scenarios of changes in biodiversity for the year 2100 can now be developed based on scenarios of changes in atmospheric carbon dioxide, climate, vegetation, and Land use and the known sensitivity of biodiversity to these changes. This study identified a ranking of the importance of drivers of change, a ranking of the biomes with respect to expected changes, and the major sources of uncertainties.
