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  1. No Access

    Article

    Comparison of multimedia and printed patient education tools for patients with osteoporosis: a 6-month randomized controlled trial

    We conducted a randomized controlled trial to compare the efficacy of adding a video tool to a printed booklet on osteoporosis. Both strategies were effective in increasing knowledge and decreasing decisional ...

    M.A. Lopez-Olivo, J.K.A. des Bordes, H. Lin, T. Rizvi… in Osteoporosis International (2020)

  2. No Access

    Article

    Nitrogen-15 labeling effectiveness of two tropical legumes

    Nitrogen-15 foliar applications for the production of field-labeled plant tissues may achieve more effective labeling of plant shoot and root tissues and minimize directly labeling the soil N fraction as occur...

    K.M. Glasener, M.G. Wagger, C.T. MacKown, R.J. Volk in Plant and Soil (1998)

  3. No Access

    Article

    Uptake of nitrogen by flue-cured tobacco during maturation and senescence

    A field experiment was conducted with flue-cured tobacco,Nicotiana tabacum L., to examine the hypothesis that after removal of the reproductive tissues (top**), which is coincident with rapid depletion of soil ...

    R. J. Goenaga, R. C. Long, R. J. Volk in Plant and Soil (1989)

  4. No Access

    Article

    Uptake of nitrogen by flue-cured tobacco during maturation and senescence

    A field experiment with flue-cured tobacco,Nicotiana tabacum L., was conducted to estimate the uptake and partitioning of nitrogen during maturation and senescence. On the 83rd day after transplanting (crop day 8...

    R. J. Goenaga, R. J. Volk, R. C. Long in Plant and Soil (1989)

  5. No Access

    Article

    Partitioning of reduced nitrogen derived from exogenous nitrate in maize roots: Initial priority for protein synthesis

    When roots of five day-old maize seedlings were exposed to15N-nitrate, a constant (25–29%) proportion of the reduced15N derived from the entering15N-nitrate accumulated as insoluble15N nitrogen. Constancy was est...

    M. A. Morgan, W. A. Jackson, W. L. Pan, R. J. Volk in Plant and Soil (1986)

  6. No Access

    Chapter

    Partitioning of reduced nitrogen derived from exogenous nitrate in maize roots: Initial priority for protein synthesis

    When roots of five day-old maize seedlings were exposed to 15N-nitrate, a constant (25–29%) proportion of the reduced 15N derived from the entering 15N-nitrate accumulated as insoluble 15N nitrogen. Constancy was...

    M. A. Morgan, W. A. Jackson, W. L. Pan… in Fundamental, Ecological and Agricultural A… (1986)

  7. No Access

    Article

    Partitioning of previously-accumulated nitrate to translocation, reduction, and efflux in corn roots

    The effect of nitrate uptake, or its absence, on the utilization of nitrate previously accumulated by dark-grown, decpitated maize (Zea mays L., cv. DeKalb XL-45) seedlings was examined. Five-d-old plants that ha...

    C. T. MacKown, W. A. Jackson, R. J. Volk in Planta (1983)

  8. No Access

    Article

    Daily changes in nitrate influx, efflux and metabolism in maize and pearl millet

    Maize (Zea mays L.) and pearl millet (Pennisetum americanum (L.) Leeke) seedlings were exposed to [15N]nitrate for 1-h periods at eight times during a 24-h period (16–8 h light-dark for maize; 14–10 h for millet)...

    C. J. Pearson, R. J. Volk, W. A. Jackson in Planta (1981)

  9. No Access

    Chapter

    Nitrate Transport Processes and Compartmentation in Root Systems

    During normal growing conditions, most higher plants in the vegetative stage tend to accumulate nitrate in the unreduced form in their root tissues and in their above-ground conducting tissues. Under certain s...

    W. A. Jackson, R. J. Volk in Genetic Engineering of Symbiotic Nitrogen … (1981)

  10. No Access

    Article

    Nitrate influx and efflux by intact wheat seedlings: Effects of prior nitrate nutrition

    Wheat (Triticum vulgare L., cv. Blueboy) seedlings, grown with 0.25, 1.0 and 15 mM nitrate in complete nutrient solutions, were transferred 10 days after germination to 1.0 mM K15NO3 (∼99 A% 15N) plus 0.1 mM CaSO

    W. A. Jackson, K. D. Kwik, R. J. Volk, R. G. Butz in Planta (1976)

  11. No Access

    Article

    Oxygen Uptake by Illuminated Maize Leaves

    EFFICIENT apparent photosynthesis and high rates of accumulation of dry matter in maize and other tropical grasses have been attributed to a lack of respiratory activity during illumination. Low CO2 compensation ...

    W. A. JACKSON, R. J. VOLK in Nature (1969)