Lipid biomarkers profile—presence of coprostanol: recent sediments from Rodrigo de Freitas Lagoon—Rio de Janeiro, Brazil

2007 ◽  
Vol 42 (11) ◽  
pp. 1553-1560 ◽  
Author(s):  
Josemar Luis Stefens ◽  
João Henrique Z. dos Santos ◽  
João Graciano Mendonça Filho ◽  
Carla Graziele Azevedo da Silva ◽  
Maria do Carmo Ruaro Peralba
2015 ◽  
Vol 06 (07) ◽  
pp. 645-655 ◽  
Author(s):  
M. C. Geraldes ◽  
S. D. Pereira ◽  
H. H. Villena ◽  
F. W. e Herms

1999 ◽  
Vol 18 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Maria Ines Feijo Ramos ◽  
Joao Carlos Coimbra ◽  
Robin C. Whatley ◽  
Alicia Moguilevsky

Abstract. A study of the family Cytheruridae in Recent sediments from the coast of northern Rio de Janeiro State revealed the presence of four new species: (Hemicytherura auriculata, Oculocytheropteron delicatum, Oculocytheropteron circumcostatum and Semicytherura caudata,) and four previously described species (Semicytherura rugosoreticulata Whatley, Chadwick, Coxill & Toy, 1988, Oculocytheropteron macropunctatum Whatley, Chadwick, Coxill & Toy, 1988, Oculocytheropteron reticulopunctatum Whatley, Chadwick, Coxill & Toy, 1988 and Paracytheridea bulbosa Purper & Ornellas, 1989). A further two species Cytheropteron sp. and Kangarina sp. are left in open nomenclature due to paucity of the material. The ecology and distribution of the fauna suggest that the presence of many of these species, which also occur in colder waters off the coast of Uruguay and Argentina, is probably due to the upwelling of the South Atlantic Central Water in this area.


Author(s):  
F. Al-Kufaishi

Two localities (Al-Marij and Laik) were selected to investigate the type of Quartz Grains from crustal material formed by evaporation of waters discharged by springs in Hit area, western Iraq, Previous studies on the crustal material (1,2) showed that the water discharged by these springs are associated with Abu-Jir fault system which run parallel to the Euphrates river,Factor analyses of the crustal and soil materials (50 samples analysed for 16 variables)(2) showed five factors; the first factor includes SiO2, Al2O3 and TiO2 with positive factor loading, and CaO, L.O.I. with negative loading and hence lead to the conclusion that the distribution of these variables is a reflection of transported clay material.This study concentrates on the use of SEM to investigate the contribution of Quartz grains found in the crustal material on two selected sites.


2018 ◽  
Vol 11 (3) ◽  
pp. 317-328 ◽  
Author(s):  
Verônica C. Araujo ◽  
Christina M. B. Lima ◽  
Eduarda N. B. Barbosa ◽  
Flávia P. Furtado ◽  
Helenice Charchat-Fichman

2010 ◽  
pp. 170-181
Author(s):  
Maria Izabel Oliveira Szpacenkopf
Keyword(s):  

Author(s):  
S Rego ◽  
J Costa ◽  
A Mesquita ◽  
C Brasil ◽  
H Dohnann
Keyword(s):  

Author(s):  
Donald Worster

Frontier and Western History in Central Brazil Dutra e Silva, S. No Oeste, a terra e o céu: a expansão da fronteira agrícola no Brasil Central (Rio de Janeiro: Mauad X, 2017)


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