Collimated scanning LS-INAA for testing trace elements homogeneity in Brazilian coffee beans

The degree of homogeneity is normally assessed by the variability of the results of independent analyses of several (e.g., 15) normal-scale replicates. Large sample instrumental neutron activation analysis (LS-INAA) with a collimated Ge detector allows inspecting the degree of homogeneity of the initial batch material, using a kilogram-size sample. The test is based on the spatial distributions of induced radioactivity. Such test was applied to samples of Brazilian whole (green) coffee beans (Coffea arabica and Coffea canephora) of approximately I kg in the frame of development of a coffee reference material. Results indicated that the material do not contain significant element composition inhomogeneities between batches of approximately 30-50 g, masses typically forming the starting base of a reference material.

Análise crítica do programa da reforma educativa para o ensino do português LS na 7ª classe em Angola

Dissertação para a obtenção de grau de Mestre em Ensino de Português Como Língua Segunda/ Língua Estrangeira

Études critiques sur les mollusques fossiles ; / par Ls. Agassiz.

Liv. 1

Études critiques sur les mollusques fossiles ; / par Ls. Agassiz.

Livr. 2

Études critiques sur les mollusques fossiles ; / par Ls. Agassiz.

Livr. 3

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1819-1820

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1817-1818

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1805-1813

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1821

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1823

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1825

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1827

Séance Publique de l'Académie des Sciences, Arts et Belles-Lettres de Dijon.

1835-1836