Results 41 to 50 of about 6,790 (156)

Lower and slower: Quantifying phosphorus leaching from struvite relative to monoammonium phosphate by 33P radioisotopic labeling

open access: yesGeoderma
Struvite (NH4MgPO4·6H2O) is a slow-release phosphorus (P) fertilizer hypothesized to reduce nutrient leaching losses relative to highly water-soluble counterparts such as monoammonium phosphate (MAP). We assessed the leaching fate of P from struvite relative to MAP using soil column experiments for two soils representative of the United States Maize ...
Patricia Leon   +3 more
openaire   +2 more sources

Use of brachytherapy in children with cancer: the search for an uncomplicated cure [PDF]

open access: yes, 2006
Brachytherapy is a sophisticated radiation method in which radioisotopes are placed inside or at a short distance from the tumour. The volume of tissue that receives the prescribed dose of radiotherapy is therefore fairly small compared
Cambeiro, M. (Mauricio)   +3 more
core  

A Comprehensive Study of Quantum Dots: Ranging From Synthesis to Applications in Electrochemical Biosensors in the Detection of Biomolecules, Gastrointestinal Diseases, and Electrophysiology

open access: yesNano Select, Volume 6, Issue 12, December 2025.
Quantum dots (QDs) typically refer to extremely small semiconductor particles, often no larger than 10 nm. The development of efficient biosensors for the sensitive and selective detection of biomolecules is essential for fundamental research in analytical chemistry, biomedicine, clinical diagnosis, and electrophysiology.
Parisa Navid   +2 more
wiley   +1 more source

Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method

open access: yesAgricultural & Environmental Letters
AbstractManagement of phosphorus (P) inputs to agroecosystems is often evaluated by phosphorus use efficiency (PUE), but different calculation approaches may yield discrepancies in estimated PUE values. We evaluated PUE (i) indirectly calculated by difference in crop P uptake between a P‐fertilized versus a P‐unfertilized control (PUEdiff) and (ii ...
Andrew J. Margenot   +2 more
openaire   +2 more sources

Comparative Effectiveness of Five Radiosotopes as Tracers in Studying Dispersal of Conotrachelus Nenuphar (Hbst.) [PDF]

open access: yes, 1954
Author Institution: Department of Entomology, Ohio Agricultural Experiment Station, Wooster ...
Rings, Roy W.
core  

Fractionation of lead in soil by isotopic dilution and sequential extraction [PDF]

open access: yes, 2011
‘Reactivity’ or ‘lability’ of lead is difficult to measure using traditional methods. We investigated the use of isotopic dilution with 204Pb to determine metal reactivity in four soils historically contaminated with contrasting sources of Pb, including (
A. M. Tye   +37 more
core   +2 more sources

Continued investigation of kinetic aspects of bone mineral metabolism [PDF]

open access: yes
The total body calcium in humans was determined by measuring expired Ar-37 after neutron irradiation. The excretion of Ar-37 from humans was found to be much slower than the excretion from rats and dogs, and to be related to the age of a person.
Palmer, H. E.
core   +1 more source

Importance of Radioactive Labelling to Elucidate Inositol Polyphosphate Signalling [PDF]

open access: yes, 2017
Inositol polyphosphates, in their water-soluble or lipid-bound forms, represent a large and multifaceted family of signalling molecules. Some inositol polyphosphates are well recognised as defining important signal transduction pathways, as in the case ...
Saiardi, A, Wilson, MSC
core  

Investigation of the Role of Organic Acids on the Phosphorus and Zinc Uptake by Corn in Calcareous Soils by Using 32P and 65Zn Radioisotopes

open access: yesمجله علوم و فنون هسته‌ای, 2014
To investigate the effect of oxalic and citric organic acids on the uptake of Phosphorus and Zinc by corn (Zea mays L.), an experiment was conducted by the use of radioactive potassium phosphate and zinc sulfate fertilizers in microcosm and greenhouse condition.
Sareh Nezami   +4 more
openaire   +1 more source

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