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Reducing the size distortions of the panel LM Test for cointegration

This paper proposes a simple procedure to reduce the size distortions of the panel LM test for cointegration. The new procedure is based on first splitting the sample into even and odd numbered observations, and to employ the panel LM test to each subsample. The two tests are then combined using the Bonferroni principle as suggested by Choi [Choi, I., 2004, Improving the empirical size of the KPSS

Exports and productivity of Russian firms: in search of causality

This paper uses a census of Russian manufacturing firms to study the relationship between exports and productivity at the firm level. The period studied, 1996–2002, implies that the results are affected by the Russian financial crisis of 1998. Exporters are shown to be more productive and larger than non-exporters, seemingly an effect of more productive firms self-selecting into the export market,

FGF-8b Induces Growth and Rich Vascularization in an Orthotopic PC-3 Model of Prostate Cancer

Fibroblast growth factor 8 (FGF-8) is expressed at an increased level in a high proportion of prostate cancers and it is associated with a poor prognosis of the disease. Our aim was to study the effects of FGF-8b on proliferation of PC-3 prostate cancer cells and growth of PC-3 tumors, and to identify FGF-8b-associated molecular targets. Expression of ectopic FGF-8b in PC-3 cells caused a 1.5-fold

Impact of chronic heart failure on elderly persons' daily life: A validation study.

Background Knowledge about how elderly persons perceive the impact of chronic heart failure (CHF) on daily life is important when planning nursing care. For this purpose, disease specific instruments are needed. However, few instruments have been developed or tested specifically on elderly persons. Aim To validate a Swedish version of the Minnesota Living with Heart Failure Questionnaire (LHFQ)

DNA compaction at hydrophobic surfaces induced by a cationic amphiphile

Cetyltrimethylammonium bromide (CTAB) induces partially irreversible compaction of DNA-adsorbed layers on hydrophobic silica. Additionally, there is a synergistic increase in the adsorbed amount when both CTAB and DNA are present as compared to the surface excess concentration of either of the individual components. In this study of the DNA adsorption and DNA-CTAB coadsorption by ellipsometry, emp

Colonization by arbuscular mycorrhizal and fine endophytic fungi in herbaceous vegetation in the Canadian High Arctic

The occurrence of arbuscular mycorrhizal (AM) fungi was surveyed along a latitudinal gradient in Arctic Canada including Banks Island (73degreesN), Devon Island (74degreesN), Ellesmere Island (76degreesN), and the Magnetic North Pole at Ellef Ringnes Island (78degreesN). At Banks Island, AM fungi were present and colonized at a high intensity in all specimens of Potentilla hookeriana Lehm. - Poten

Fecundability according to male serum inhibin B - a prospective study among first pregnancy planners

BACKGROUND: New biological markers of male fecundity are needed for use in large-scale epidemiological studies. We studied the association between male inhibin B and fecundability. METHODS: Four hundred and thirty Danish couples without previous reproductive experience were followed from termination of contraception until pregnancy or for a maximum of six menstrual cycles. At enrolment we obtained

Bright solitary waves in a Bose-Einstein condensate and their interactions

We examine the dynamics of two bright solitary waves with a negative nonlinear term. The observed repulsion between two solitary waves-when these are in an antisymmetric combination-is attributed to conservation laws. Slight breaking of parity, in combination with weak relaxation of energy, leads the two solitary waves to merge. The effective repulsion between solitary waves requires certain nearl

Graph Laplacians and Topology

Laplace operators on metric graphs are considered. It is proven that for compact graphs the spectrum of the Laplace operator determines the total length, the number of connected components, and the Euler characteristic. For a class of non-compact graphs the same characteristics are determined by the scattering data consisting of the scattering matrix and the discrete eigenvalues.

The influence of venous admixture on alveolar dead space and carbon dioxide exchange in acute respiratory distress syndrome: computer modelling

Introduction Alveolar dead space reflects phenomena that render arterial partial pressure of carbon dioxide higher than that of mixed alveolar gas, disturbing carbon dioxide exchange. Right-to-left shunt fraction (Qs/Qt) leads to an alveolar dead space fraction (VdA(S)/VtA; where VtA is alveolar tidal volume). In acute respiratory distress syndrome, ancillary physiological disturbances may include

The Jurassic of Skåne, Southern Sweden

In Sweden, Jurassic strata are restricted to Skåne and adjacent offshore areas. Jurassic sedimentary rocks predominantly comprise sandy to muddy siliciclastics, with subordinate coal beds and few carbonate-rich beds. During Mesozoic times, block-faulting took place in the Sorgenfrei– Tornquist Zone, a tectonic zone which transects Skåne in a NW–SE direction. The Jurassic depositional environments

Health beliefs and heart disease risk among middle-aged Swedish men. Results from screening in an urban primary care district

OBJECTIVE: To study the relationship between individual health beliefs and risk factors for coronary heart disease. DESIGN: Health beliefs indices, formed by factorial analysis of ratings of statements on health related matters in a questionnaire, were related to risk factors for coronary heart disease, assessed with physical examinations and self reports of medical history and habits. SETTING: An

Oxi4503, a novel vascular targeting agent: effects on blood flow and antitumor activity in comparison to combretastatin A-4 phosphate.

Oxi4503, which is the diphosphate prodrug of combretastatin A1, is a novel vascular targeting agent from the combretastatin family. Another member of this family, Combretastatin A-4 phosphate (CA4P), is a well-characterized vascular targeting agent already being evaluated in clinical trials. The potential for tumor vascular targeting by Oxi4503 was assessed in a mouse system. This approach aims to

Evaluation of optimally designed planar-concave collimators in single-photon emission tomography

The imaging properties of optimally designed planar-concave (PC) collimators were evaluated by means of Monte Carlo simulations. The evaluation was done with respect to total system spatial resolution and the overall image noise distribution in single-photon emission tomography. The results showed that the non-isotropy with PC collimators, assessed by the ratio of the full-width at half-maximum in

Differential prognostic impact of the cyclins E and B in premenopausal and postmenopausal women with lymph node-negative breast cancer

Searching for new prognostic factors, we investigated the influence of cyclin expression on breast cancer prognosis. A total of 273 archival tumor specimens from patients with pT1/pT2 NO breast cancers treated by surgery and local irradiation were immunostained for cyclins E, A and B. Outcome was evaluated as metastasis-free (MFS) and diseasespecific survival (DSS) over a median observation period