Results 211 to 220 of about 6,443 (255)
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Isotopic Exchange Reactions between Phosphorus Trichloride and Phosphorus Pentachloride1
Journal of the American Chemical Society, 1957A measurable exchange of isotoplcally labeled phosphorus and chlorine has been observed between phosphorus trichloride and phosphorus pentachloride in carbon tetrachloride solution. The exchange rates are the same within experimental error and the reaction is first order in phosphorus pentachloride and zero order in phosphorus trichloride.
Warren E. Becker, Rowland E. Johnson
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Phosphorus in caves : Oxygen isotopes in phosphate as a novel speleothem palaeothermometer [PDF]
, 2022 Speleothems are key archives for palaeoclimatological study, yet current methods for palaeotemperature records are often affected by processes independent to temperature. Phosphorus is a ubiquitous component of speleothem calcite in caves, yet its efficacy as a palaeothermometer has not yet been fully explored.
Morgan, Alistair +3 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.
Frossard, E., Sinaj, S., Dufour, P.
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2021
Phosphorus (P) is often the limiting nutrient contributing to phytoplankton blooms and deteriorating water quality. It is imperative to identify key sources of P in watersheds, especially in areas where P has accumulated in the soil and created a potential source of long-term releases into water bodies. The existing limitation of analytical methods for
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Phosphorus (P) is often the limiting nutrient contributing to phytoplankton blooms and deteriorating water quality. It is imperative to identify key sources of P in watersheds, especially in areas where P has accumulated in the soil and created a potential source of long-term releases into water bodies. The existing limitation of analytical methods for
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Soil Science Society of America Journal, 1988
Abstract A procedure using 32 P isotopic exchange kinetics was suggested to characterize the availability of soil P. The ratio of the radioactivity remaining in the solution over the total radioactivity ( r 1 /
T. Sen Tran, M. Giroux, J. C. Fardeau
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Abstract A procedure using 32 P isotopic exchange kinetics was suggested to characterize the availability of soil P. The ratio of the radioactivity remaining in the solution over the total radioactivity ( r 1 /
T. Sen Tran, M. Giroux, J. C. Fardeau
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Soil Science Society of America Journal, 1994
Abstract In fertilized agricultural soils, both fertilizer and soil P are partly depleted by crop export, while residual fertilizer P reacts with the soil. As a result, P availability changes in complex ways that cannot be described by an available P pool.
Morel, Christian +3 more
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Abstract In fertilized agricultural soils, both fertilizer and soil P are partly depleted by crop export, while residual fertilizer P reacts with the soil. As a result, P availability changes in complex ways that cannot be described by an available P pool.
Morel, Christian +3 more
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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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Environmental Science & Technology
Long-term phosphorus (P) fertilization results in P accumulation in agricultural soil and increases the risk of P leaching into water bodies. However, evaluating P leaching into groundwater is challenging, especially in clay soil with a high P sorption capacity.
Takuya Ishida +7 more
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Long-term phosphorus (P) fertilization results in P accumulation in agricultural soil and increases the risk of P leaching into water bodies. However, evaluating P leaching into groundwater is challenging, especially in clay soil with a high P sorption capacity.
Takuya Ishida +7 more
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Reactivity of Phosphorus in Northeastern Brazilian Soils Assessed by Isotopic Dilution
Soil Science Society of America Journal, 1991Abstract To diagnose fertilizer requirements in regions of high soil variability where P‐fixing capacities can vary 100‐fold, single‐extraction P tests must be complemented by an evaluation of P sorption. The isotopic‐dilution kinetics of 32 P was tested for its potential to
I. H. Salcedo +2 more
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