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	Provedor de dados Anais da ESALQ (1) Scientia Agricola (1) Autor Andrioli,L. (1) Centurion,J.F. (1) Marchiori,D. G. (1) Marconi,A. (1) Marques Jr.,J. (1) Rodrigues,E.M. (1) Mais... Palavra-chave Latossolo roxo (2) Mineralogia de solos (1) Pedogênese (1) Rocha alcalina (1) Tipo do documento Info:eu-repo/semantics/article (2) Ano 1995 (1) 1990 (1) País Brazil (2) Idioma Português (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 105 Primeira ... 1 2 3 4 5 6 ... Última Triceratium moreirae sp. nov. and Triceratium dubium (Triceratiaceae - Bacillariophyta) from estuarine environments of Southern Brazil, with comments on the genus Triceratium C. G. Ehrenberg BJB FERNANDES,L. F.; SOUZA-MOSIMANN,R. M. de. A new species of Triceratiaceae is described for estuarine environments of Southern Brazil. The valve of Triceratium moreirae sp. nov. is triangular with elevations bearing ocellus and a rimoportula in their basis. The valvar surface has robust pseudoloculi, circular to polygonal, each one confining a group of areolae arranged in a typical pattern. A central larger areola is surrounded by 5-8 smaller areolae, and they are poroidal with domed cribra. A septum emerges from the valvocopula, having the base reinforced by ribs and the margins folded to the innerside of the valve. The new species is compared to the closely related diatom Triceratium dubium, which has the same pattern of areolar disposition, formation of septum and pseudoloculi. The main... Tipo: Info:eu-repo/semantics/article Palavras-chave: Taxonomy; Diatom; Triceratium; Estuary; Mangrove; Southern Brazil. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100020 Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil) BJB SOUZA,M. F. L. de; COUTO,E. C. G.. Net pelagic metabolism (NPM) and net ecosystem metabolism (NEM) were assessed by sigmaCO2 changes in three sampling stations along Piauí River estuary. At the upper estuary station, sampling was carried out over 48 h. Samples exhibited high DIN:DIP ratios. Chlorophyll-a ranged from 0.2 to 2.5 mug.l-1, being higher at the upper estuarine station than marine ones. Net pelagic metabolic rates ranged from -13.2 to 61.2 mgC.m7-2.d-1. Presence of mucilaginous algal material can explain the net mineralization. In the photic period, NPM ranged from-0.05 to 3.04 mgC.m-2h-1. NEM ranged from -7.77 to 6.65 mgC.m-2.d-1. Bottom ressuspension due to microphytobenthic flotation and a high turbidity plume inside de estuary reflected in negative metabolic rates... Tipo: Info:eu-repo/semantics/article Palavras-chave: Estuary; Short-term changes; Primary production; Mineralization; Microphytobenthos. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200003 Preliminary assessment of heavy metal levels in Mytella falcata (Bivalvia, Mytilidae) from Bacanga River estuary, São Luis, State of Maranhão, Northeastern Brazil BJB CARVALHO,G. P. de; CAVALCANTE,P. R. S.; CASTRO,A. C. L. de; ROJAS,M. O. A. I.. The concentrations of Cu, Zn, Pb, and Cd were determined in the mussel Mytella falcata from the Bacanga River estuary, in order to evaluate the potential role of domestic effluents released "in natura" on the quality of the estuarine environment with consequences to shellfish resources. Cu concentrations ranged from 5.2 mg.g-1 to 13.1 mg.g-1, while Zn concentrations ranged from 49.1 mg.g-1 to 76.3 mg.g-1. Pb and Cd showed concentrations lower than 2 mg.g-1. The results showed low concentrations of Cu, Pb and Cd in the filter-feeding Mytella falcata in the study area in comparison with the maximum values stablished to foods by the Brazilian Government (Decree Law Nº 55,871). Finally, Zn presented slightly higher values than the maximum ones stablished by... Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Bivalves; Mytella falcata; Estuary; Pollution. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100003 Liver oxidative stress of the grey mullet Mugil cephalus presents seasonal variations in Ennore estuary BJMBR Padmini,E.; Vijaya Geetha,B.; Usha Rani,M.. The objective of this study was to determine the liver oxidative stress status of grey mullets living in heavy-metal-rich polluted Ennore estuary compared with unpolluted Kovalam estuary. Fish were collected from both estuaries during the monsoon and summer seasons from October 2004 to September 2006. Fish liver homogenate (N = 20 per group) was prepared for evaluating oxidative stress parameters. Fish living in the polluted estuary had significantly higher lipid oxidation products, conjugated dienes (0.346 ± 0.017 vs 0.141 ± 0.012 DA233/mg protein), lipid hydroperoxides (0.752 ± 0.032 vs 0.443 ± 0.03 nmol/mg protein), and lipid peroxides (3.447 ± 0.14vs 1.456 ± 0.096 nmol MDA/mg protein) than those of the unpolluted estuary during the summer. In contrast,... Tipo: Info:eu-repo/semantics/other Palavras-chave: Antioxidant defense; Estuary; Grey mullets; Oxidative stress; Pollutants. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008001100002 Characterization of Aeromonas species isolated from an estuarine environment BJM Evangelista-Barreto,Norma Suely; Carvalho,Fatima Cristiane Teles de; Vieira,Regine Helena S. dos Fernandes; dos Reis,Cristhiane Moura Falavina; Macrae,Andrew; Rodrigues,Dália dos Prazeres. Thirty water samples were collected, at two week intervals, from the estuary of the River Cocó. The aim was to characterize the presence, distribution and types of Aeromonas spp, in the estuary of the River Cocó, Ceara, Brazil (03º46'28.83''S e 38º26'36.52''S). Aeromonas were identified in 19 (63%) samples analyzed by plating and CFU counts. Presence/absence tests were positive for 11 (37%) of the samples resulting in the detection of Aeromonas in a total of 23 (77%) of samples. CFU counts varied from < 10 to 1.4 x 10(4) CFU mL-1 . From the isolated strains seven species of Aeromonas were identified: A. caviae (29/69), A. veronii bv. sobria (13/69), A. veronii bv. veronii (8/69), A. trota (6/69), A. media (5/69), A. sobria (4/69) and A. hydrophila and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeromonas; Estuary; Antibiotics. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200027 Registros recuperados: 105 Primeira ... 1 2 3 4 5 6 ... Última

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