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We have performed experiments where DKDP has been irradiated by short (100 fs), laser pulses. Subsequently X-ray pulses with a duration of 100 ps were used as a probe. Time-resolved X-ray diffraction enables monitoring of the transitions between the paraelectric and ferroelectric phases. By recording the intensity of a peak only present in the paraelectric phase, we observe indications of a phase-
Aryl iodides are important synthetic intermediates that can be transformed into tritium labelled compounds by metal-mediated hydrodehalogenation and also react in a number of important synthetic transformations. We present ICI/ln(OTf)(3) as a new reagent combination for mild iodination, suitable for acid-sensitive substrates such as carbohydrates. (c) 2005 Elsevier Ltd. All rights reserved.
By using the density matrix theory of interaction between light and matter, and relevant parameter calculations of the relaxation rate, the dipole matrix elements and the ion density for a three-level ladder model, we have discussed theoretically the possibility to realize electromagnetically induced transparency (EIT) in Er3+:YA1O(3) crystal. (C) 2002 Elsevier Science B.V. All rights reserved.
Dijet cross sections as functions of several jet observables are measured in photoproduction using the HI detector at HERA. The data sample comprises e(+)p data with an integrated luminosity of 319 pb(-1). Jets are selected using the inclusive k(perpendicular to) algorithm with a minimum transverse energy of 25 GeV for the leading jet. The phase space covers longitudinal proton momentum fraction x
The most malignant brain tumour, glioblastoma multiforme (GBM), has an utterly bad prognosis. In spite of all available therapy, the mean survival time is less than a year. In the unique BRIGTT project (Brain Immuno Gene Tumour Therapy), patients at the Dept of Neurosurgery. Lund University Hospital, are immunised with their own glioma cells, which have been transfected with the immunostimulatory
The development of inflammatory bowel diseases (IBD) and colon cancer (CC) has been shown to involve the up-regulation of inflammatory mediators and the machinery producing them such as the eicosanoids. Changes in the expression of extracellular matrix proteins and their related integrin receptors have also been shown to be important in the advancement IBD and CC. In light of this, we have investi
In 2001, multi-family dwellings were built at nine properties in Västra hamnen, Malmö, Sweden. Several well known Swedish architects were involved in designing the buildings, hence they reflect modern architecture. Prior to the inauguration, the buildings were displayed at the international housing exhibition Bo01. The housing exhibition had an ecological and sustainability focus. Regarding energy
The pine sawfly, Diprion jingyuanensis Xiao et Zhang, is a serious pest of Chinese pine (Pinus tabulaeformis Carr.) in the northern parts of China. The general biology of this recently described sawfly species is little known and in the present study we used a synthetic pheromone to monitor its flight period and to evaluate the possibility to use pheromone traps as a tool for estimating and predic
Silver recovery from photographic fixing solutions is investigated by applying solvent extraction techniques. Amines were shown to be the most promising extractants and quaternary ammonium chlorides selected for further studies because of high distribution coefficients and low pH-sensitivity. The distribution coefficient for silver from a 0.5 M ammonium thiosulphate solution increases from 2.3 to
I denna artikel beskrivs hur de kanadensiska mi’kmaqindianerna bearbetar problem som härstammar från tiden i Shubenacadie Residential School. Fastän den stora internatskolan idag är nedlagd fortsätter den att sätta spår i de moderna reservatsbornas liv. Artikelmaterialet hämtas bland annat från ett fältarbete (2000) på ön Cape Breton, Nova Scotia. För att det kanadensiska majoritetssamhället ska f
Bacillus subtilis ferrochelatase is encoded by the hemH gene of the hemEHY gene cluster and catalyses the incorporation of Fe2+ into protoporphyrin IX. B. subtilis ferrochelatase produced in Escherichia coli was purified. It was found to be a monomeric, water-soluble enzyme of molecular mass 35 kDa which in addition to Fe2+ can incorporate Zn2+ and Cu2+ into protoporphyrin IX. Chemical modificatio
