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Alexander P. Hansen
Researcher at University of Maryland University College
Publications - 31
Citations - 497
Alexander P. Hansen is an academic researcher from University of Maryland University College. The author has contributed to research in topics: Nitrate & Higher education. The author has an hindex of 10, co-authored 30 publications receiving 410 citations. Previous affiliations of Alexander P. Hansen include University of Western Australia & University of Hohenheim.
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Journal ArticleDOI
Axial Length Variation Impacts on Superficial Retinal Vessel Density and Foveal Avascular Zone Area Measurements Using Optical Coherence Tomography Angiography.
Danuta M. Sampson,Peijun Gong,Di An,Moreno Menghini,Alexander P. Hansen,David A. Mackey,David D. Sampson,Fred K. Chen +7 more
TL;DR: Ocular biometry should be performed with OCTA to correct image magnification error induced by axial length variation, and caution is advised when interpreting interocular and interindividual comparisons of SRVD and FAZA derived from OCTA without image size correction.
Journal ArticleDOI
Symbiotic Performance of Supernoclulating Soybean (Glycine max (L.) Merrill) Mutants during Development on Different Nitrogen Regimes
Alexander P. Hansen,Mark B. Peoples,Peter M. Gresshoff,Craig A. Atkins,John S. Pate,Bernard J. Carroll +5 more
TL;DR: Comparison of estimates of N2 fixation derived from the 15N-dilution technique with those based on relative ureide content of xylem sap indicated that the latter offered a simple and reliable procedure for evaluating the symbiotic performance of supernodulating plants.
Journal ArticleDOI
Evaluation of the 15N Natural Abundance Method and Xylem Sap Analysis for Assessing N2 Fixation of Understorey Legumes in Jarrah (Eucalyptus marginata Donn ex Sm.) Forest in S.W. Australia
Alexander P. Hansen,John S. Pate +1 more
TL;DR: Hansen, A. P. and Pate, J. S. 1987.
Journal ArticleDOI
Effect of Oxygen Supply on Nitrogenase Activity of Nitrate- and Dark-Stressed Soybean (Glycine max (L.) Merr.) Plants
TL;DR: It is suggested that suboptimal oxygen concentration near the bacteroids is an important factor limiting nitrogenase activity in nitrate- or dark-stressed soybeans.
Journal ArticleDOI
Short-Term Nitrate Effects on Hydroponically-Grown Soybean cv. Bragg and its Supernodulating Mutant I. CARBON, NITROGEN AND MINERAL ELEMENT DISTRIBUTION, RESPIRATION AND THE EFFECT OF NITRATE ON NITROGENASE ACTIVITY
TL;DR: The data indicate that nitrogenase activities of Bragg and nts 1007 are equally sensitive to short-term application of nitrate, and both genotypes were equally dependent on nitrogen fixation when nitrate was absent.