Results 11 to 20 of about 70,014 (336)
Nutrición Hospitalaria, 2012 Introducción: En Chile, la prevalencia de obesidad en los escolares es de 21,3%. El estudio y la intervención individual de esta malnutrición, hacen necesario contar no sólo con indicadores globales de estado nutricional, sino también, indicadores que ...
F. Vásquez +5 more
doaj +1 more source
Ultra-trace Cu isotope ratio measurements via multi-collector ICP-mass spectrometry using Ga as internal standard : an approach applicable to micro-samples [PDF]
, 2018 The capabilities of Cu isotope ratio measurements are often restricted by the small volumes of sample available and/or their low Cu concentration. In this work, an analytical approach was developed for performing Cu isotopic analysis via multi-collector ...
Costas Rodriguez, Marta +2 more
core +1 more source
The vertical distribution of iron stable isotopes in the North Atlantic near Bermuda [PDF]
, 2012 Seawater dissolved iron isotope ratios (δ^(56)Fe) have been measured in the North Atlantic near Bermuda. In a full-depth profile, seawater dissolved δ^(56)Fe is isotopically heavy compared to crustal values throughout the water column (δ^(56)Fe_(IRMM-014)
Adkins, Jess, John, Seth G.
core +1 more source
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2009 A pesquisa foi realizada para avaliar o fluxo biológico do fósforo entre os compartimentos, fisiológicos ou anatômicos, de suínos mantidos em dietas que continham níveis crescentes de fitase, usando o P-32 como traçador.
J.A. Moreira +3 more
doaj +1 more source
Evidence of hydrological control of Sr behavior in stream water (Strengbach catchment, Vosges mountains, France) [PDF]
, 2002 Strontium and particularly 87Sr/86Sr ratios in stream water have often been used to calculate weathering rates in catchments. Nevertheless, in the literature, discharge variation effects on the geochemical behavior of Sr are often omitted or considered ...
Amiotte-Suchet +48 more
core +2 more sources
Food and Energy Security, 2023 The availability of phosphorus (P) fertilizer applied to soil can diminish rapidly because of the complex soil P immobilization processes. However, the quantitative distribution of fertilizer P in the soil P fractions is not fully understood.
Dongfang Zheng +5 more
doaj +1 more source
Blank Correction in Isotope Dilution
Analytical Chemistry, 2015 A novel method for compensation of the procedural blank in isotope dilution is presented. This method, entitled "blank-matching", copes with the blank through experimental design. Both sample and calibration solutions are exposed to the same amount of isotopic standard and same procedural blank.
Pagliano, Enea +2 more
openaire +4 more sources
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
Isotopic Abundance and Chemical Purity Analysis of Stable Isotope Deuterium Labeled Sudan I
Journal of Isotopes, 2014 It is important that to analysis of the isotopic abundance and chemical purity of Sudan I-D5, which is the internal standard of isotope dilution mass spectrometry.
CAI Yin-ping;LEI Wen;ZHENG Bo;DU Xiao-ning
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