Results 111 to 120 of about 6,223 (163)
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Cosmic-ray-produced phosphorus isotopes in the atmosphere
Journal of Geophysical Research, 1966Concentrations of P32 and P33 produced by interactions of secondary neutrons from cosmic rays with Ar in the atmosphere were determined radiochemically in ten samples of about 100 liters of rainwater collected at Fayetteville, Arkansas, during the period between June 1965 and February 1966. The observed P33/P32 ratios varied from 0.8 to 1.7.
M. N. Rao, L. Husain, P. K. Kuroda
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EFFECT ON BONE GRAFTS OF RADIO-ACTIVE ISOTOPES OF PHOSPHORUS
The Journal of Bone & Joint Surgery, 1951Fourteen dogs were used to measure the relative rates of phosphorus-ion exchange from autogenous, boiled, frozen, and merthiolate bank bone. Comparing the rate of uptake of P32 by boiled and frozen inlay grafts in the tibia to that of autogenous inlay grafts at one, two, three, and four weeks, three days after subcutaneous injection of radio-active ...
R T, ODELL, C B, MUELLER, J A, KEY
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Phosphorus isotopes P32 and P33 in rain water
Nuclear Physics, 1957Abstract In 1955, Marquez and Costa 1) detected Phosphorus 32 (half life ≈ 14 days) in rain water. They attributed its presence to the spallation of atmospheric Argon nuclei by cosmic rays. We have detected, in rain water, the second short lived radio-isotope of Phosphorus, P 33 (half life ≈ 25 days).
D. Lal, N. Narasappaya, P.K. Zutshi
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Soil Science, 1990
Adsorption properties of a soil with previous additions of different phosphate fertilizers were characterized by means of the Langmuir isotherm. The best correlation with the Langmuir isotherm was obtained for low added-phosphorus concentration and for conditions of different amounts of initial soil phosphorus treatment.
SILVIA C. LÓPEZ +2 more
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Adsorption properties of a soil with previous additions of different phosphate fertilizers were characterized by means of the Langmuir isotherm. The best correlation with the Langmuir isotherm was obtained for low added-phosphorus concentration and for conditions of different amounts of initial soil phosphorus treatment.
SILVIA C. LÓPEZ +2 more
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Water Research, 2013
Phosphorus (P) starved algae have a capacity to rapidly take up P when resupplied to P. This study was set-up to measure to what extent P starvation enhances the potential of algae to utilize organic P forms. The initial (
Christoff, Van Moorleghem +3 more
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Phosphorus (P) starved algae have a capacity to rapidly take up P when resupplied to P. This study was set-up to measure to what extent P starvation enhances the potential of algae to utilize organic P forms. The initial (
Christoff, Van Moorleghem +3 more
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Isotope Labeling to Study Phosphorus Uptake in the Arbuscular Mycorrhizal Symbiosis
2020Isotope labeling enables the detection and quantification of nutrient fluxes between soil and plants through arbuscular mycorrhizal (AM) fungi. Here we describe the use of radioactive isotopes, 33P and 32P, to study the uptake of P from soil by AM fungal mycelium and its transfer to the host plant through the mycorrhizal pathway.
Cruz-Paredes, Carla, Gavito, Mayra E.
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Soil Science Society of America Journal, 2009
Our objective was to evaluate the relative contribution of physicochemical (diffusion) and biological (mineralization) processes to the supply of ionic P (iP) in solution and potential P availability to plants in a low P sorbing forest soil.
Achat, David +2 more
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Our objective was to evaluate the relative contribution of physicochemical (diffusion) and biological (mineralization) processes to the supply of ionic P (iP) in solution and potential P availability to plants in a low P sorbing forest soil.
Achat, David +2 more
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Synthesis of nucleoside 5'-triphosphates labelled with radioactive phosphorus isotopes
Russian Chemical Reviews, 1995The review presents an analysis of the chemical chemicoenzymic, and enzymic methods of synthesis of nucleoside 5'-triphosphates labelled with phosphorus isotopes ( 32P and 33P) in the α- and γ-positions. The major part of the review is devoted to enzymic methods of synthesis, because they have undoubted advantages. The enzymatic reactions are described
Yurii S Skoblov +2 more
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Phosphorus in Urban Sewage Sludges as Assessed by Isotopic Exchange
Soil Science Society of America Journal, 1996Abstract Sewage sludges have been used for years as fertilizers but little information exists on the availability of P in these complex materials. Isotopically exchangeable P was measured in 12 urban sewage sludges using the isotopic exchange kinetics method.
E. Frossard, S. Sinaj, P. Dufour
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Soil Properties and Phosphorus Isotopic Exchangeability in Cropped Temperate Soils
Communications in Soil Science and Plant Analysis, 2013Isotopically exchangeable phosphate (P) is the main source of P for most crops. The amount of P that is located on the solid phase of a soil and that can exchange with P in the soil solution can be calculated knowing the concentration of water-extractable P (CP ) and two kinetic parameters: (i) the ratio between the total introduced radioactivity added
Paolo Demaria +3 more
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