Within the framework of the European Land Arctic Physical Processes project and as part of the Danish Research Council's Polar Program, a study on trace gas exchange in a high-arctic ecosystem was conducted in NE Greenland, May-August 1997. On the basis of carbon dioxide flux measurements from three dominant surface types, this paper reports on the upscaling of such measurements from canopy to lan

High-spin states in Nd-138 have been investigated with the reaction Zr-94(Ca-48,4n), using the GASP array. A new rotational band has been identified, which has close similarities with the well known highly deformed bands of the lighter Nd isotopes, and is therefore interpreted as built on the second minimum of the nuclear potential energy surface. From comparison with calculations a configuration

The thermotropic phase behaviour and phase structure of crystalline and non-crystalline n-tetradecyl-beta-D-maltoside (C(14)G(2)) and n-hexadecyl-beta-D-maltoside (C(16)G(2)) have been investigated by means of differential scanning calorimetry and X-ray techniques. Upon lyophilisation, both compounds form a solid, lamellar phase comprising disordered head groups and hexagonally packed alkyl chains

Based on the principle of nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) are widely used methods in medical diagnostic imaging and biological research. Clinical MRI has been restricted to imaging of protons, for reasons of sensitivity. In recent years, hyperpolarization techniques have emerged that can increase the NMR signal by 5–6 ord

Silver birch and common oak are known to be sensitive to standard practices in nurseries and they often show poor establishment when transplanted in urban areas. Lifting date and time in cold storage have a strong influence on stress tolerance and plant vitality. This study was carried out to assess the effect of lifting date and storage time on partial photosynthesis measured by chlorophyll fluor

Mathematical and numerical modeling of the complex interplay between compaction, flow, and hydrodynamic dispersion in a chromatographic column under steady stale conditions has been examined. The mathematical model was based on pure elastic analysis and Darcy flow. A two-dimensional control volume approach was applied to solve the coupled nonlinear equations describing the flow and compaction. The

When ethnographers in the 1950s and 1960s did fieldwork among the Canadian Mi’kmaq Indians, they were worried about the future of Mi’kmaq culture. Not many Mi’kmaq in the thirties had heard about their traditional culture hero Kluskap, and if they had, it was through books or the television series “The Adventures of Glooscap”. Thirty years later, in 1989, the Mi’kmaq strongly rejected the plans t

This article deals with Gerhard Oestreich's concept of 'Sozialdisziplinierung' and its possible status as a challenger to the two main schools within the Swedish state of research concerning the Early Modern state-building process. These main streams in Swedish historical research concists of the Interventionists, who argue for the state's more or less brutal intervention in the local autonomous s

By recognizing and characterizing conditions under which atrial fibrillation (AF) is likely to terminate spontaneously or be sustained, improved treatment of sustained AF may result and unnecessary treatment of self-terminating AF avoided. Time-frequency measures that characterize AF, such as fibrillatory frequency, amplitude, and waveform shape (exponential decay), are extracted from the residual

The lysosomal cysteine proteinase cathepsin B is shown to be secreted by ten human colon carcinoma cell lines and to accumulate in culture media as a latent enzyme. The cell lines also secrete a physiological inhibitor of cathepsin B, cystatin C. A significant correlation was found between secretion of the latent enzyme and the inhibitor (r = 0.755, P < 0.01). The aim of the present study was to m

This paper presents a methodology with the purpose of modeling and simulating outdoor temperature and relative humidity (vapor concentration) related to moisture exposure on timber structures. The methodology is based on time-series analysis with recorded meteorological data used as input. In situations where recorded data is missing or consists of limited sequences, this methodology offers the po

The phase and electrochemical behavior of the aqueous mixtures of monoolein (MO) and synthetic ferrocene (Fc) derivatives containing long alkyl chains -(Z)-octadec-9-enoylferrocene (1), (Z)-octadecen-9-ylferrocene (2), and ferrocenylmethyl (Z)-octadec-9-enoate (3)-were studied. At low hydration, the reversed micelles (L-2 phase) and cubic Q(230) phase of MO can accommodate relatively high amounts

The matrix Riccati equation appears in many optimal control and filtering problems. In this paper the Riccati equation is studied from an algebraic point of view, and the results are applied on optimal control of linear time invariant systems with quadratic loss.

Popular Abstract in Swedish Åderförkalkning i benens artärer ger upphov till "fönstertittarsjuka" och, i svåra fall, kritisk ischemi med vilosmärtor och sår eller kallbrand. I dessa sistnämnda fall är risken för en amputation stor. Kärlkirurgiska metoder med s.k. bypassoperationer användes för att söka rädda benen. För detta ändamål används helst patientens egna vener, men i vissa fall måste man aThe expression of surface adhesion molecules on white blood cells (WBC) and platelets, and the release of tumor necrosis factor-alpha (TNF-a) and interleukin-6 (IL-6) after incubation with expanded-polytetrafluoroethylene (ePTFE)- or woven Dacron grafts was determined. Both graft-materials induced alteration of the WBC adhesion molecule receptor and caused release of TNF-a and IL-6, higher for wov