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Transient absorption anisotropy of a polythiophene polymer in a thin film was studied on a femtosecond time scale. The anisotropy has a non-exponential decay on the sub-picosecond time scale, with a fastest component characterized by an ∼40 fs time constant. To simulate the anisotropy decay an incoherent energy migration model has been used. Comparison between the simulated and experimental kineti
Atrial fibrillation (AF), the most common atrial arrhythmia, has a complex aetiology and causes relevant morbidity and mortality due to different mechanisms, including but not limited to stroke, heart failure, and tachy- or bradyarrhythmia. Current therapeutic options (rate control, rhythm control, antithrombotic therapy, 'upstream therapy') only prevent a part of this burden of disease. Several n
Multiconfigurational SCF and second-order perturbation theory have been employed to study seven low-lying electronic states of the CoC molecule (X-2 Sigma(+), A(2)Delta, B(2)Phi, C(2)Phi, D(2)Pi, E(2)Pi, and F(2)Sigma(+)). Three doublet electronic states have been described for the first time: B 2 (D C(2)Phi (R-0 = 1.617 angstrom, To = 10455 cm(-1). and a), = 1159 cm(-1)), and D(2)Pi (R-0 = 1.632
The habitat distribution of red-listed plants, fungi and animals that have been found in the central parts of the parish of Stenbrohult, southern Sweden since 1970 is presented (Tables 1-4). In the centre of the 5 000 ha study area Carl Linnaeus was born in 1707, and he spent his summers there until 1727. In 1971-2002 at least 183 red-listed species have been found, with 73 wood-living beetle spec
High-spin states in Mo-86 were studied by means of the fusion evaporation reaction Ni-58(S-32,2p2n) Mo-86 at 135 MeV beam energy. Charged-particle-gamma gamma and -gamma gamma gamma coincidences recorded with the early implementation of the GAMMASPHERE array and the MICROBALL charged-particle detection system were used to largely extend the level scheme of the T-tau=1 nucleus Mo-86 to a possible s
In 91 patients (36 men, 55 women) who were hospitalized with symptoms of acute cholecystitis, cholescintigraphy was performed with 99m-Tc-ethyl-IDA, in order to evaluate the method in the diagnosis of acute inflammatory disease of the gallbladder. Five groups of patients were recognized: (A) abnormal scintigraphy and verified gallbladder disease, (B) abnormal scintigraphy without verified gallblad
Solid and gel electrolytes based on comblike poly(propylene oxide) (PPO) have been prepared and studied. The polymer consisted of a polyethylene backbone densely grafted with PPO side chains terminated by hexadecanoyl chain ends. Analysis by impedance spectroscopy of the solid polymer electrolytes containing lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) salt showed ion conductivities of 10(-5
This article is based on the belief that research focused on PR tourism is of fundamental importance to understanding the role of PR in contemporary culture. Our analysis shows that tourism has not received much attention from PR researchers and that a critical perspective uncovers a host of key issues in promotional culture: power, politics and diplomacy in international communication; risk, ethi
In this article the authors suggest that chaos theory can provide us witha new perspective on archaeology. Newtonian thinking is predominantin archaeology, as well as in the humanities in general. This results inthe hegemony of analytic methods and a linear way of thinking on causeand effect. However, chaos theory has shown that behind many phen-omena that may seem random lies order. Since these c
Podoscyphic acid 1, a fungal metabolite inhibiting RNA-directed DNA polymerises, was synthesised in four steps starting from dodecanal. The concluding ester hydrolysis of 4 was not feasible with chemical reagents, only enzymatic hydrolysis was mild enough to release the highly reactive natural product in good yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
Background: Thalidomide has a chiral centre, and the racemate of (R)- and (S)-thalidomide was introduced as a sedative drug in the late 1950s. In 1961, it was withdrawn due to teratogenicity and neuropathy. There is now a growing clinical interest in thalidomide due to its unique anti-inflammatory and immunomodulatory effects. Objective: To critically review pharmacokinetic studies and briefly rev
Protein tyrosine phosphatase (PTP)-1B, encoded by the PTPN1 gene, inactivates the insulin signal transduction cascade by dephosphorylating phosphotyrosine residues in insulin signaling molecules. Due to its chromosomal location under a chromosome 20 linkage peak and the metabolic effects of its absence in knockout mice, it is a candidate gene for type 2 diabetes. Recent studies have associated com
With shrinking technologies and higher clock rates comes the possibility to transform multi chip implementations to a single System on Chip (SoC). Implementing clock distribution and limiting the power consumption becomes increasingly troublesome with increased clock rate and chip area. Therefore, designing large Systems on Chip makes it necessary to search for new implementation methods. In this
