Results 11 to 20 of about 68,403 (337)

Tracking sources and fate of groundwater nitrate in Kisumu City and Kano Plains, Kenya [PDF]

, 2020
Groundwater nitrate (NO3−) pollution sources and in situ attenuation were investigated in Kisumu city and Kano plains. Samples from 62 groundwater wells consisting of shallow wells (hand dug, depth 15 m) were obtained during wet (May–July 2017) and dry ...
Boeckx, Pascal, Mureithi, Stephen, Nyilitya, Benjamin   +2 more
core   +1 more source

On Presolar Stardust Grains from CO Classical Novae [PDF]

, 2018
About 30% to 40% of classical novae produce dust 20-100 days after the outburst, but no presolar stardust grains from classical novae have been unambiguously identified yet.
Downen, Lori, Iliadis, Christian, Jose, Jordi, Nittler, Larry, Starrfield, Sumner   +4 more
core   +4 more sources

Measurement of isotopically-exchangeable Zn in Zn-deficient paddy soil [PDF]

, 2015
The changes in soil chemistry following submergence of a soil for rice production result in zinc (Zn) being immobilized in very insoluble forms. Consequently, Zn deficiency is widespread in rice crops and in human populations that subsist on rice.
Atkinson, Ayoub, Bostick, Breemen, Degryse, Dobermann, Forno, Gabler, Hamon, Impa, IRRI, Izquierdo, Izquierdo, Kirk, Laeter, Lindsay, Midwood, Nazif, Oliver, Ponnamperuma, Ponnamperuma, Quevauviller, Römkens, Sajwan, Scharpenseel, Sinaj, Sterckeman, Stroud, Tiller, Tiller, USDA, Young, Young   +32 more
core   +2 more sources

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, Lauwens, Sara, Vanhaecke, Frank   +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

Modelos matemáticos para o estudo do fluxo biológico do fósforo em suínos alimentados com dietas suplementadas com níveis crescentes de fitase Mathematical models for the study of the biological flow of phosphorus in pigs fed with diets containing increasing levels of phytase

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, J.B. Lopes, D.M.S.S. Vitti, A.O. Teixeira   +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, Anne Probst, Aubert, Bailey, Bain, Bain, Bonhomme, Clow, Dambrine, Daniel Viville, Depaolo, Dominique Aubert, Elias, Fichter, Fichter, Gosz, Gosz, Graustein, Graustein, Idir, Jacks, Krishnaswami, Ladouche, Land, Lasaga, Lefèvre, Likens, McNutt, Miller, Négrel, Négrel, Palmer, Peter Stille, Pionke, Pionke, Probst, Probst, Probst, Probst, Probst, Probst, Rice, Riotte, Stottlemyer, Tricca, Åberg, Åberg, Åberg, Åberg   +48 more
core   +2 more sources

Quantifying phosphorus fertilizer distribution and the contribution of fertilizer and soil legacy phosphorus to phosphorus uptake by maize – A 32P‐labelling study

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, Huimin Yuan, Guojiang Yang, Gu Feng, Zed Rengel, Jianbo Shen   +5 more
doaj   +1 more source

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

Influence of Fermentation Water on Stable Isotopic D/H Ratios of Alcohol Obtained from Concentrated Grape Must

Molecules, 2020
According to Organisation Internationale de la vigne et du vin (OIV) standards, when analysing the stable isotope ratio of deuterium to hydrogen D/H at the methyl (I) and methylene (II) site of ethanol from concentrated must, a dilution with tap water is
Matteo Perini, Andrea Failoni, Marco Simoni, Agostino Tonon, Federica Camin   +4 more
doaj   +1 more source