Results 41 to 50 of about 68,403 (337)

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

Diffusion‐based size determination of solute particles: a method adapted for postsynaptic proteins

FEBS Open Bio, EarlyView.
We present a diffusion‐based approach for measuring the size of macromolecules and their complexes, and demonstrate its use on postsynaptic proteins. The method requires fluorescein‐labelled protein samples, a microfluidic device that maintains laminar flow for said samples, a microscope recording the emitted fluorescent signals, and an analytic ...
András László Szabó, Eszter Nagy‐Kanta, Soma Varga, Edit Andrea Jáger, Csaba István Pongor, Mária Laki, András József Laki, Zoltán Gáspári   +7 more
wiley   +1 more source

Magnesium isotopes: a tool to understand self-enrichment in Globular Clusters

, 2018
A critical issue in the asymptotic giant branch (AGB) self-enrichment scenario for the formation of multiple populations in Globular Clusters (GCs) is the inability to reproduce the magnesium isotopic ratios, despite the model in principle can account ...
D'Antona, Franca, Dell'Agli, Flavia, Di Criscienzo, Marcella, Imbriani, Gianluca, Tailo, Marco, Ventura, Paolo   +5 more
core   +1 more source

Copper Doping Enhances the Activity and Selectivity of Atomically Precise Ag44 Nanoclusters for Photocatalytic CO2 Reduction

Advanced Functional Materials, EarlyView.
By a simple anti‐Galvanic reaction, up to six copper atoms could be preferably doped into the Ag2(SR)5 staple motifs and Ag20 dodecahedral shell of an atomically precise Ag44(SR)30 nanocluster. When anatase TiO2 is used as substrate, the (AgCu)44/TiO2 photocatalyst exhibited much improved activity in photocatalytic CO2 reduction compared to Ag44/TiO2 ...
Ye Liu, Xi Zheng, Xiufan Liu, Tengyuan Gao, Nicola Pinna, Yu Wang   +5 more
wiley   +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  

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

Reactive and mixing processes governing ammonium and nitrate coexistence in a polluted coastal aquifer [PDF]

, 2018
A comprehensive hydrochemical, stable isotope and microbial analyses characterisation has been performed to evaluate the sources of groundwater, nitrogen pollution and degradation processes occurring in an industrial polluted coastal aquifer in the ...
Aravena, Ramon, Colombani, Nicolò, Mastrocicco, Micòl, Petitta, Marco, Sbarbati, Chiara   +4 more
core   +2 more sources

High‐Density Boron Nitride Nanotube Composites via Surfactant‐Stabilized Lyotropic Liquid Crystals for Enhanced Space Radiation Shielding

Advanced Functional Materials, EarlyView.
High‐density BNNT films, enabling mechanical robustness and high space radiation shielding effectiveness, are fabricated using surfactant‐stabilized BNNT liquid crystal. Simulations indicate that a 50 g cm−2 BNNT film can reduce radiation exposure by 56% compared to zero shielding, potentially doubling the duration of astronaut missions on the lunar ...
Young‐Kyeong Kim, Ik Jae Lim, Hongjin Lim, Yongbi Joo, Jueun Park, Md Monir Hossain, Hyunjin Cho, Nam‐Ho You, Seokhoon Ahn, Hunsu Lee, Sang Seok Lee, Yongho Joo, Se Youn Moon, Hee Il Yoo, Calista Lum, Cheol Park, Siyoung Q. Choi, Se Gyu Jang   +17 more
wiley   +1 more source

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

Stable isotope dilution assays in mycotoxin analysis [PDF]

Analytical and Bioanalytical Chemistry, 2007
The principle and applications of stable isotope dilution assays (SIDAs) in mycotoxin analysis are critically reviewed. The general section includes historical aspects of SIDAs, the prerequisites and limitations of the use of stable isotopically labelled internal standards, and possible calibration procedures.
Stefan Asam, Michael Rychlik
openaire   +3 more sources