Results 21 to 30 of about 831,647 (217)

Analysis of high burnup pressurized water reactor fuel using uranium, plutonium, neodymium, and cesium isotope correlations with burnup

Nuclear Engineering and Technology, 2015
The correlation of the isotopic composition of uranium, plutonium, neodymium, and cesium with the burnup for high burnup pressurized water reactor fuels irradiated in nuclear power reactors has been experimentally investigated.
Jung Suk Kim, Young Shin Jeon, Soon Dal Park, Yeong-Keong Ha, Kyuseok Song   +4 more
doaj   +1 more source

Cinética de fósforo com modelos matemáticos em ovinos adultos Phosphorus kinetics using mathematical models for adult sheep

Pesquisa Agropecuária Brasileira, 2007
O objetivo deste trabalho foi avaliar, por meio de modelos matemáticos, o metabolismo de fósforo (P) em ovinos adultos suplementados com teores crescentes de farinha de ossos calcinados com 0, 1, 2 e 3 g de P por animal por dia.
Helder Louvandini, Dorinha Miriam Silber Schmidt Vitti   +1 more
doaj   +1 more source

Antagonistic Interaction of Selenium and Cadmium in Human Hepatic Cells Through Selenoproteins

Frontiers in Chemistry, 2022
Cadmium (Cd) is a highly toxic heavy metal for humans and animals, which is associated with acute hepatotoxicity. Selenium (Se) confers protection against Cd-induced toxicity in cells, diminishing the levels of ROS and increasing the activity of ...
S. Ramírez-Acosta, R. Uhlírová, F. Navarro, J. L. Gómez-Ariza, T. García-Barrera   +4 more
doaj   +1 more source

Aproveitamento de nitrogênio pelo milho, em razão da adubação verde, nitrogenada e fosfatada Nitrogen utilization by corn as affected by green manures and nitrogen and phosphorus fertilizers

Pesquisa Agropecuária Brasileira, 2009
O objetivo deste trabalho foi avaliar o aproveitamento, pelo milho (Zea mays L.), do nitrogênio (N) proveniente da ureia, de restos culturais da crotalária (Crotalaria juncea) e do milheto (Pennisetum glaucum), e do solo, em função da adubação ...
Edson Cabral da Silva, Takashi Muraoka, Felipe Carlos Alvarez Villanueva, Freddy Sinencio Contreras Espinal   +3 more
doaj   +1 more source

Diagnóstico da deficiência de fósforo em ovinos pela técnica de incorporação de fósforo radioativo nos eritrócitos Phosphorus deficiency diagnosis in sheep using labeled phosphorus uptake by erythrocytes

Pesquisa Agropecuária Brasileira, 2006
Este trabalho teve como objetivo avaliar a técnica de incorporação de 32P pelos eritrócitos de ovinos jovens, mantidos em pastejo de Andropogon gayanus, como método de diagnóstico da deficiência de fósforo.
Dalton Araujo Antunes, Helder Louvandini, José Cleto da Silva Filho, Concepta Margaret McManus, Bruno Steffano Dallago, Bruno de Oliveira Machado, Dharana Guedes Mendonça, Patrícia Spoto Correa   +7 more
doaj   +1 more source

The Re-Os Isotopic System: Geochemistry and Methodology at the Geochronological Research Center (CPGeo) of the University of São Paulo, Brazil [PDF]

Geologia USP. Série Científica, 2007
The Re-Os isotopic system is an important tool for the study of mantle-crust processes, geochronology and the tracingof source reservoirs for metal deposition.
Ciro Teixeira Correia, Jason Donald Kirk, Louise Ruth Frick, Liliane Aparecida Petronilho, Colombo Celso Gaeta Tassinari, Kei Sato   +5 more
doaj  

Cinética do fósforo em tecidos de suínos em crescimento Phosphorus kinetic in tissue of swine in the growing phase

Revista Brasileira de Zootecnia, 1999
Esta pesquisa foi realizada para estudar a cinética do fósforo (P) em tecidos de suínos em crescimento, alimentados com rações contendo níveis crescentes de P total (0,30; 0,40; 0,51; 0,65; e 0,73%), por meio do uso do 32P como traçador.
João Batista Lopes, Dorinha Miriam Silber S. Vitti, Agustinho Valente de Figueirêdo, Hacy Pinto Barbosa   +3 more
doaj   +1 more source

Realisation and preliminary validation of a dilution device for the generation of CO2 gas mixtures

Measurement: Sensors, 2021
The present paper describes the activity carried out at Istituto Nazionale di Ricerca Metrologica (INRIM) within the EMPIR Joint Research Project 16ENV06 “Metrology for Stable Isotope Reference Standards - SIRS”, for the realisation of a dilution device ...
Francesca Rolle, Michela Sega, Francesca Romana Pennecchi, Pier Giorgio Spazzini, Stefano Pavarelli, Marco Santiano   +5 more
doaj   +1 more source

Solution to the isotope dilution challenge [PDF]

Analytical and Bioanalytical Chemistry, 2015
Over the years, isotope dilution mass spectrometry (IDMS) has witnessed many reformulations. One of the earliest expressions for this quantitation model was given by the single isotope dilution (IDMS). In IDMS, the mass fraction of an analyte A is obtained from mass spectrometric analysis of a mixture (blend) of sample and an isotopically-enriched form
openaire   +3 more sources

Phosphorus availability and speciation in the fertosphere of three soils over 12 months

Geoderma
Identifying the effects of soil properties on the transformations of phosphorus (P) in highly concentrated fertiliser bands is a critical component in improving P fertiliser use efficiency, but little is known regarding the kinetics of P transformation ...
Brigid A. McKenna, Peter M. Kopittke, Michael J. Bell, Enzo Lombi, Wantana Klysubun, Timothy I. McLaren, Casey L. Doolette, Gregor Meyer   +7 more
doaj   +1 more source