Results 201 to 210 of about 6,443 (255)

Labelling with Isotopes of Phosphorus, Sulfur and the Halogens

2011
There are both stable and radioactive isotopes of phosphorus, sulfur and the halogens which have been used for labelling purposes. In this chapter, we consider methods that have been used to prepare labelled compounds containing these isotopes.
exaly   +2 more sources

EFFECT ON BONE GRAFTS OF RADIO-ACTIVE ISOTOPES OF PHOSPHORUS

The Journal of Bone & Joint Surgery, 1951
Fourteen 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
openaire   +2 more sources

Bioavailability of organic phosphorus to Pseudokirchneriella subcapitata as affected by phosphorus starvation: An isotope dilution study

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, Nynke, De Schutter, Erik, Smolders, Roel, Merckx   +3 more
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Phosphorus isotopes P32 and P33 in rain water

Nuclear Physics, 1957
Abstract 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
openaire   +1 more source

Cosmic-ray-produced phosphorus isotopes in the atmosphere

Journal of Geophysical Research, 1966
Concentrations 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
openaire   +1 more source

EFFECT OF PREVIOUS FERTILIZATION ON PHOSPHORUS ADSORPTION. MEASUREMENT OF SURFACE PHOSPHORUS BY ISOTOPIC EXCHANGE

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, NÉSTOR O. BÁRBARO, SUSANA ROJAS DE TRAMONTINI   +2 more
openaire   +1 more source

Tracing phosphorus cycle in global watershed using phosphate oxygen isotopes

Science of The Total Environment, 2022
The Phosphorus (P) cycle is a crucial biochemical process in the earth system. However, an extensive increase of P input into watersheds destroyed the ecosystem. To explore the effects of internal P loading and external P input in global watersheds, we reviewed the research progress and synthesized the isotope data of experimental results from ...
Ziteng, Wang, Qingjun, Guo, Liyan, Tian
openaire   +2 more sources

Formation of Lipin Phosphorus in Normal and Rachitic Rats, with a Radioactive Phosphorus Isotope as an Indicator

Nature, 1938
Formation of Lipin Phosphorus in Normal and Rachitic Rats, with a Radioactive Phosphorus Isotope as an ...
M. J. L. DOLS, B. C. P. JANSEN, G. J. SIZOO, F. BARENDREGT   +3 more
openaire   +1 more source

Isotopic studies on the absorption and tissue distribution of white phosphorus in rats

Experimental and Molecular Pathology, 1971
Abstract The intestinal absorption and distribution of 32 P in different tissues of rats intoxicated with this element were studied in this experiment. The results indicated that phosphorus is rapidly absorbed and was mainly incorporated into the liver where it reached its maximum (69–73% of the given dose) within 2–3 hours. The hepatic subcellular
A K, Ghoshal, E A, Porta, W S, Hartroft
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Isotope Labeling to Study Phosphorus Uptake in the Arbuscular Mycorrhizal Symbiosis

2020
Isotope 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.
openaire   +3 more sources