Results 11 to 20 of about 426,141 (144)

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

Agricultural & 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, Neha Chatterjee, Chongyang Li   +2 more
wiley   +4 more sources

Advancing Nuclear Medicine through Discovery, Invention, and Innovation - Contribution of a Physicist and Scientist (Vikram Sarabhai Memorial Oration-2023). [PDF]

Indian J Nucl Med
The history of radiation science began with Wilhelm Rontgen’s discovery of X-rays in 1895, followed closely by Henri Becquerel’s discovery of radioactivity in 1896.
Jha AK.
europepmc   +2 more sources

Evaluation of Effects of Phosphorus Concentration on Microbial Population and Material Flux in Aquatic Microcosm Using Radioisotope Tracer

Japanese Journal of Water Treatment Biology, 2003
In this study, effects of phosphorus concentration on aquatic microcosms were evaluated in terms of microbial population dynamics and the photosynthetic activity that is the starting point of the material flux. Microcosms that consist of algae Chlorella vulgaris, bacteria Pseudomonas putida and ciliate Cyclidium glaucoma were incubated using media that
Yuhei Inamori, Satoshi Tsuneda, Takashi Kondo, Akira Hirata, Tomoaki Itayama   +4 more
openaire   +4 more sources

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

Geoderma
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, Neha Chatterjee, Chongyang Li, Andrew J. Margenot   +3 more
openaire   +3 more sources

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

مجله 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 ...
Sareh Nezami, Mohammadjafar Malakouti, Ali Bahrami-Samani, Kambiz Bazargan, Mohammad Ghanadi Maragheh   +4 more
doaj   +1 more source

A Novel Method to Determine the Carbon Isotopic Composition of Inositol Hexaphosphate (Phytate) in Soil by Gas Chromatography-Combustion-Isotope Ratio Mass Spectrometry. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Understanding the decomposition of inositol hexaphosphate (phytate), the dominant form of organic phosphorus (OP) in soil, is vital for studying phosphorus (P) cycling in terrestrial ecosystems. However, the lack of multiple stable P isotopes complicates the study of phytate dynamics under natural conditions and over long periods ...
Sarangi V, Spohn M.
europepmc   +2 more sources

Effects of Phosphorus Deficiency on Leaf Surface Morphology: Absorption and Translocation of Foliar-Applied Phosphorus in Four Barley Cultivars. [PDF]

Physiol Plant
ABSTRACT Plant nutrient deficiencies can modify leaf surface properties and may affect the absorption of foliar fertilisers. This study examined how plant P‐deficiency modified the adaxial leaf surface morphology of four barley cultivars and whether these modifications could be linked to quantitative differences in foliar‐applied P absorption.
Arsic M, Howell NR, Cresswell T, Brunetti G, Husted S, Schjoerring JK, Persson DP, Lombi E, Doolette CL.   +8 more
europepmc   +2 more sources

Autoradiography of Pi Distribution in Barley Seedlings

Bio-Protocol, 2014
Phosphorus-32 and Phosphorus-33 are radioisotopes of phosphorus. These isotopes are used to trace ionic phosphorus and phosphorus compounds. This protocol is used to follow the movement of inorganic phosphate (PO43-) from a leaf tip to the rest of the ...
Satomi Kanno, Yuko Kurita, Miwa Ohnishi, Tetsuro Mimura   +3 more
doaj   +1 more source

Auto-atténuation de la radiation β dans les sources radioactives épaisses

CHIMIA, 1961
In measuring β-radioactivity of thick sources, one has to take in account the phenomenon of self-weakening in the source. The present paper shows if the choice of the distance between source and counter on one hand, and of the chemical nature of the ...
Pierre Lerch, A. Vogel-Ludin
doaj   +1 more source

A dual isotopic approach using radioactive phosphorus and the isotopic composition of oxygen associated to phosphorus to understand plant reaction to a change in P nutrition

Plant Methods, 2017
Background Changing the phosphorus (P) nutrition leads to changes in plant metabolism. The aim of this study was to investigate how these changes are reflected in the distribution of 33P and the isotopic composition of oxygen associated to P (δ18OP) in ...
Verena Pfahler, Federica Tamburini, Stefano M. Bernasconi, Emmanuel Frossard   +3 more
doaj   +1 more source