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  1. No Access

    Article

    The Experimental Albertan Satellite #1 (Ex-Alta 1) Cube-Satellite Mission

    The Experimental Albertan satellite #1 (Ex-Alta 1) was a three-unit cube satellite (CubeSat) developed at the University of Alberta (UAlberta). As the first ‘made in Alberta’ spacecraft, the Ex-Alta 1 CubeSat ...

    I. R. Mann, C. D. A. Nokes, C. Cupido, D. M. Miles, B. Bruner… in Space Science Reviews (2020)

  2. No Access

    Article

    Hand movements in laparoscopic suturing: a simple vector analysis

    Laparoscopic suturing is a complex task that is vital to the performance of many advanced laparoscopic procedures. Mastery can be difficult and problematic for surgical trainees.

    A. J. Hansen, R. T. Schlinkert in Surgical Endoscopy And Other Interventional Techniques (2005)

  3. No Access

    Article

    Spatial patterns of primary productivity in the Greater Yellowstone Ecosystem

    Landscapes are often heterogeneous in abiotic factors such as topography, climate, and soil, yet little is known about how these factors may influence the spatial distribution of primary productivity. We repor...

    A.J. Hansen, J.J. Rotella, M.P.V. Kraska, D. Brown in Landscape Ecology (2000)

  4. No Access

    Chapter

    The Environment and Development Crises as Determinants of Landscape Dynamics

    We are living in a period of unprecedented change in the history of humankind. Never before have the ecosystems of the world and the biosphere as a whole been affected by such intense and diverse impacts. It h...

    F. di Castri, A. J. Hansen in Landscape Boundaries (1992)

  5. No Access

    Book

    Biological Invasions in Europe and the Mediterranean Basin

    F. di Castri, A. J. Hansen… in Monographiae Biologicae (1990)

  6. No Access

    Chapter and Conference Paper

    Brain Interstitial Composition During Acute Hyponatremia

    Brain cortical water spaces were determined in rat brain following an intraperitoneal infusion of distilled water (15% of body weight). Total water content was determined by gravimetric methods while the size ...

    J. A. Lundbæk M.D., T. Tønnesen, H. Laursen, A. J. Hansen in Brain Edema VIII (1990)

  7. No Access

    Chapter and Conference Paper

    Calcium Movements in Brain During Failure of Energy Metabolism

    The interstitial ion concentrations in brain are maintained within narrow limits. Changes in plasma concentrations are effectively dealt with by the low ionic permeability of the blood-brain barrier combined w...

    E. Zhang, M. Lauritzen, T. Wieloch, A. J. Hansen in Cerebral Ischemia and Calcium (1989)

  8. No Access

    Chapter and Conference Paper

    Aspects of Calcium Ions in Cortical Spreading Depression

    Cortical spreading depression (CSD) is a transient perturbation of nerve cell activity which propagates across the cortex at a rate of 2–5 mm/min [15]. CSD is a highly stereotyped stimulus-independent event in...

    M. Lauritzen, M. Sheardown, A. J. Hansen in Cerebral Ischemia and Calcium (1989)

  9. No Access

    Chapter

    Chemotherapy of Plant Virus Infections

    Plant virus chemotherapy, in the strict sense, can be defined as the production of virus-free plants from infected stock by chemical means. Currently available plant virus chemo-therapeuticals are not virucida...

    A. J. Hansen in New Vaccines and Chemotherapy (1988)

  10. No Access

    Chapter

    Brain Extracellular pH Changes During Alterations in Substrate Supply

    The alterations in brain extracellular ionic composition during spreading depression (SD), anoxia, ischemia, and profound hypoglycemia have been clarified to a large extent through the use of double-barrelled ...

    W. A. C. Mutch, A. J. Hansen in Ion Measurements in Physiology and Medicine (1985)

  11. No Access

    Chapter and Conference Paper

    Mono-/bivalent Ion Selectivities Obtained by the Nicolsky and the Electrodiffusional Regimes

    Two methods may be applied for the determination of ion selectivity coefficients. One is the separate solution technique, SST, in which measurements are performed in different solutions containing only one sal...

    N. Bindslev, A. J. Hansen in Progress in Enzyme and Ion-Selective Electrodes (1981)

  12. No Access

    Article

    Extracellular potassium and blood flow in the post-ischemic rat brain

    The concentration of extracellular potassium, [K+]e, was measured in parietal cortex and basal ganglia of rats during and after ten minutes of complete cerebral ischemia. The post-ischemic normalization of [K+]e ...

    A. J. Hansen, A. Gjedde, E. Siemkowicz in Pflügers Archiv (1980)

  13. No Access

    Article

    A yellow strain of potato virus X

    The isolation of a previously undescribed yellow strain of potato virus X is reported. The strain incites bright yellow non-necrotic lesions on the inoculated leaves ofN. rustica. On certain other hosts, it also ...

    A. J. Hansen, R. H. Larson in American Potato Journal (1959)

  14. No Access

    Article

    The occurrence of the brownspot strain of potato virus X

    A. J. Hansen, R. H. Larson in American Potato Journal (1957)