Results 31 to 40 of about 64,717 (306)
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 +4 more
doaj +1 more source
Timing carbon turnover (δ13C) in weaned piglet’s brain by IRMS
Anais da Academia Brasileira de Ciências, 2018 Isotope-ratio mass spectrometry (IRMS) is a potential tool that provides time-integrated estimate of assimilated and not just ingested nutrients. This feature turned possible its application to evaluate the effects of dietary nucleotides and glutamate on
MAYRA A.D. SALEH +5 more
doaj +1 more source
Carbon-rich presolar grains from massive stars : subsolar ¹²C/¹³C and ¹⁴N/¹⁵N ratios and the mystery of ¹⁵N [PDF]
, 2015 Carbon-rich grains with isotopic anomalies compared to the Sun are found in primitive meteorites. They were made by stars, and carry the original stellar nucleosynthesis signature.
Fryer, C. +9 more
core +3 more sources
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 +1 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 +5 more
doaj +1 more source
Evaluation of diffusive gradients in thin-films using a Diphonix® resin for monitoring dissolved uranium in natural waters [PDF]
, 2015 Commercially available Diphonix® resin (TrisKem International) was evaluated as a receiving phase for use with the diffusive gradients in thin-films (DGT) passive sampler for measuring uranium.
Amos, Sean +4 more
core +2 more sources
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 +3 more
doaj +1 more source
High-precision measurements of seawater Pb isotope compositions by double spike thermal ionization mass spectrometry [PDF]
, 2014 A new method for the determination of seawater Pb isotope compositions and concentrations was developed, which combines and optimizes previously published protocols for the separation and isotopic analysis of this element.
Bridgestock, L +4 more
core +2 more sources
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 +7 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 +4 more
doaj +1 more source