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Anais da Academia Brasileira de Ciências

Rodolfo J Angulo, Paulo C F Giannini, Maria Cristina DE Souza, Guilherme C Lessa
The present work discusses and reinterprets paleo-sea level indicators used to build Holocene sea-level curve for the coast of Rio de Janeiro at former works. We conclude that: (a) the paleo-sea levels inferred by vermetid remains show that sea-level has fallen over the past 4400 years, at least; (b) the paleo-sea level inferred by the beachrock facies and dated shells of Jaconé shows that sea-level was near the present elevation between 8198 and 5786 years before present; and (c) several shells from other beachrocks were deposited probably thousands of years after the specimens died and consequently do not allow precise reconstructions of paleo-sea levels...
November 10, 2016: Anais da Academia Brasileira de Ciências
Valter Silva
A recent published newspaper article commented on the (lack of) quality of Brazilian science and its (in) efficiency. The newspaper article was based on a special issue of Nature and on a new resource for scientometrics called Nature Index. I show here arguments and sources of bias that, under the light of the principle in dubio pro reo, it is questionable to dispute the quality and efficiency of the Brazilian science on these grounds, as it was commented on the referred article. A brief overview of Brazilian science is provided for readers to make their own judgment...
September 2016: Anais da Academia Brasileira de Ciências
Débora P Paula, Lucas M DE Souza, David A Andow, Alex A T Cortês DE Sousa, Carmen S S Pires, Edison R Sujii
We evaluated an artificial tritrophic exposure system for use in ecotoxicological evaluations of environmental stressors on aphidophagous predators. It consists of an acrylic tube with a Parafilm M sachet containing liquid aphid diet, into which can be added environmental stressors. Immature Cycloneda sanguinea, Harmonia axyridis and Chrysoperla externa, and adult H. axyridis were reared on Myzus persicae. Larval and pupal development and survival of all species and reproductive parameters of H. axyridis were similar to published results...
September 2016: Anais da Academia Brasileira de Ciências
Mariana G Cavalheiro, Leandro Silva DA Costa, Holmes S Campos, Letícia S Alves, Iranaia Assunção-Miranda, Andrea T DA Poian
Alphaviruses among the viruses that cause arthritis, consisting in a public health problem worldwide by causing localized outbreaks, as well as large epidemics in humans. Interestingly, while the Old World alphaviruses are arthritogenic, the New World alphaviruses cause encephalitis. One exception is Mayaro virus (MAYV), which circulates exclusively in South America but causes arthralgia and is phylogenetically related to the Old World alphaviruses. Although MAYV-induced arthritis in humans is well documented, the molecular and cellular factors that contribute to its pathogenesis are completely unknown...
September 2016: Anais da Academia Brasileira de Ciências
Vilberto J Vieira, Armando D'Acampora, Fernanda S Neves, Paulo R Mendes, Zulmar A DE Vasconcellos, Rodrigo D'Eça Neves, Claudia P Figueiredo
Breast augmentation with silicone implants is one of the most common procedures performed by plastic surgeons around the world. Capsular contracture is a frequent complication in breast augmentation and reconstructive surgery, that requires invasive intervention. The inflammatory response to implanted mammary prostheses appears to be directly associated to capsular contracture. This review discusses the evidences from rat models studies, on the role of inflammation and fibrosis in capsular contraction and its relation to silicone breast implants surface...
September 2016: Anais da Academia Brasileira de Ciências
Francisco R S Carvalho, Antonio G Moura, Gardenia F Rodrigues, Narcia M F Nunes, Daisy J B Lima, Claudia Pessoa, Marcilia P Costa, Paulo M P Ferreira, Ana Paula Peron
The objective of this study was to evaluate the antiproliferative, cytotoxic and genotoxic potential of salty liquid synthetic flavorings of Butter, Cheddar Cheese and Onion. The antiproliferative potential (2.9-1500 µg/mL) was assessed by MTT assay after 72h using the human tumor lines SF-295 (glioblastoma), OVCAR-8 (ovarian), HCT-116 (colon) and HL-60 (promyelocytic leukemia) and primary cultures of murine Sarcoma 180 (S180) and peripheral blood mononuclear cells (PBMC). Allium cepa bulbs were exposed to growing respective doses (1 mL and 2 mL)...
September 2016: Anais da Academia Brasileira de Ciências
Sheila P Carvalho-Fernandes, Sharlene Ascendino, Valéria C Maia, Márcia S Couri
Surveys in the coastal sandy plains (restingas) of Rio de Janeiro have shown a great richness of galls. We investigated the galling insects in two preserved restingas areas of Rio de Janeiro state: Parque Estadual da Costa do Sol and Reserva Particular do Patrimônio Natural Fazenda Caruara. The collections were done each two months, from June 2011 to May 2012. We investigated 38 points during 45 minutes each per collection. The galls were taken to the laboratory for rearing the insects. A total number of 151 insect galls were found in 82 plant species distributed into 34 botanic families...
September 2016: Anais da Academia Brasileira de Ciências
Jislene B Matos, Suellen M O DE Oliveira, Luci C C Pereira, Rauquírio M DA Costa
The present study aimed to analyze the structure and the temporal variation of the phytoplankton of Ajuruteua beach (Bragança, Pará) and to investigate the influence of environmental variables on the dynamics of this community to provide a basis about the trophic state of this environment. Biological, hydrological and hydrodynamic samplings were performed during a nyctemeral cycle in the months of November/08, March/09, June/09 and September/09. We identified 110 taxa, which were distributed among the diatoms (87...
September 2016: Anais da Academia Brasileira de Ciências
Alexander W A Kellner
No abstract text is available yet for this article.
September 2016: Anais da Academia Brasileira de Ciências
Monica A Gonçalves, Fábio C Garcia, Gilberto F Barroso
Lake Nova (15.5 km2) is the second largest lake in the Lower Doce River Valley (Southeastern Brazil). A better understanding of ecosystem structure and functioning requires knowledge about lake morphometry, given that lake basin form influences water column stratification. The present study aims to contribute to the understanding of relationship between morphometry and mixing patterns of deep tropical lakes in Brazil. Water column profiles of temperature and dissolved oxygen were taken on four sampling sites along the lake major axis during 2011, 2012 and 2013...
September 2016: Anais da Academia Brasileira de Ciências
Pedro V Guimarães, Pedro S Pereira, Lauro J Calliari, Jean T Ellis
The backshore zone is transitional environment strongly affected by ocean, air and sand movements. On dissipative beaches, the formation of ephemeral dunes over the backshore zone plays significant contribution in the beach morphodynamics and sediment budget. The aim of this work is to describe a novel method to identify ephemeral dunes in the backshore region and to discuss their morphodynamic behavior. The beach morphology is identified using Argus video imagery, which reveals the behavior of morphologies at Cassino Beach, Rio Grande do Sul, Brasil...
September 2016: Anais da Academia Brasileira de Ciências
Bárbara P Paiva, Carlos A F Schettini, Marçal D Pereira, Eduardo Siegle, Luiz B Miranda, Fernando P Andutta
Estuarine processes are directly related to the interaction of its forcing conditions with the local morphology. In this study we assess the implications of the opening of a new inlet on the hydrodynamics and suspended sediment concentration (SSC). A set of physical parameters have been measured in the Itanhém river estuary, a small, shallow and mangrove fringed tropical estuary in Northeastern Brazil. Field surveys have been conducted in August 2007 and January 2008, separated by an important morphological change...
September 2016: Anais da Academia Brasileira de Ciências
Walter N L Dos Santos, Maria Celeste S Sauthier, Dannuza D Cavalcante, Clícia M J Benevides, Fábio S Dias, Daniele C M B Santos
The atemoya is a hybrid fruit obtained by crossing of cherimoya (Annona cherimola Mill.) with sweet sop (Annona squamosa L.). The information about chemical composition of atemoya is scarce. The mineral composition was evaluated employing Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) and the centesimal composition and the physico-chemical parameters were assessed employing procedures described in the AOAC methods. The total phenolic compounds (TPC) and total flavonoids (TF) were determined using spectroanalytical methods...
September 2016: Anais da Academia Brasileira de Ciências
Francisco J DE Figueiredo, Douglas R M Ribeiro
†Codoichthys carnavalii is a clupeomorph fish only found in calcareous concretions of Codó Formation, State of Maranhão. It is known based on three specimens housed in the paleontological collection of the Museu de Ciências da Terra of Departamento Nacional da Produção Mineral, Rio de Janeiro. It was omitted in most of recent cladistic analyses about clupeomorphs. We revisited its anatomy furnishing new data and additional restorations. Furthermore we explored the relationships of †Codoichthys with the computer program TNT based on a matrix with 30 taxa and 60 unordered and unweight characters...
September 2016: Anais da Academia Brasileira de Ciências
Vanessa G Alves, Alan G Souza, Lucas U R Chiavelli, Ana L T G Ruiz, João E Carvalho, Armando M Pomini, Cleuza C Silva
The cultivation of sugarcane hybrids (X Saccharum officinarum L.) is an important revenue source for the Brazilian economy. Herein it is reported the evaluation of the cytotoxic activity of mid-polarity sugarcane extracts against human cancer cell lines, as well as the isolation of steroids sitosterol, stigmasterol and campesterol, phenolic acids p-hydroxybenzoic, p-hydroxycinnamic, vanillic and ferulic acid, terpenoids α-tocopherol and β-carotene and a novel substance in sugarcane, the flavonoid aglycone tricin (5,7,4-trihydroxy-3,5-dimethoxyflavone)...
September 2016: Anais da Academia Brasileira de Ciências
Lorena M D Cirino, Daviane M C Vergne, Patrícia F Santana, Enrik DE Almeida, Luiz P DA Costa, Ricardo L C DE Albuquerque-Júnior, Isabel B Lima-Verde, Francine F Padilha, Juliana C Cardoso
The objective of this work was to study the reduction in the capsaicin toxicity by encapsulation in liposomes. Capsaicin was extracted from peppers and characterized with high performance liquid chromatography (HPLC). We determined the zeta potential, polydispersivity index (PdI) and vesicle size of liposomes. Wistar rats were submitted to intravesical instillation of liposomes (LIP), capsaicin (CAP) or liposomes with capsaicin (CAPLIP). After 24 hours, bladders were removed for histological analysis. Vesicle size ranged from 68 to 105 nm with PdI smaller than 0...
September 2016: Anais da Academia Brasileira de Ciências
Daniel A V Montero, Marcia Ortiz M Marques, Laura M M Meletti, Maria H VAN Kampen, Sandra C Polozzi
This study describes for the first time the chemical composition and olfactive description of floral scent from Brazilian Passiflora (Passiflora edulis Sim, Passiflora alata Curtis, Passiflora cincinnata Mast., Passiflora coccinea Aubl. and Passiflora quadrangularis L.). Five species were grown in greenhouse at the Agronomic Institute (IAC), São Paulo, Brazil. Volatile compounds were collected using dynamic headspace. Analyses of scent composition were performed by gas chromatograph coupled to mass spectrometer...
September 2016: Anais da Academia Brasileira de Ciências
Manuelle C Cardozo, Dannuza D Cavalcante, Daniel L F Silva, Walter N L Dos Santos, Marcos A Bezerra
A method was developed for determination of total antimony in hair samples from patients undergoing chemotherapy against Leishmaniasis based on the administration of pentavalent antimonial drugs. The method is based on microwave assisted digestion of the samples in a pressurized system, reduction of Sb5+ to Sb3+ with KI solution (10% w/v) in ascorbic acid (2%, w/v) and its subsequent determination by hydride generation atomic fluorescence spectrometry (HG-AFS). The proportions of each component (HCl, HNO3 and water) used in the digestion were studied applying a constrained mixtures design...
September 2016: Anais da Academia Brasileira de Ciências
Ana Lucia S M Felicio, Alessandra M Monteiro, Mariana B Almeida, Tiago B Madeira, Suzana L Nixdorf, Maria Josefa S Yabe
Diuron is one of the most widely herbicide used worldwide, which can undergo degradation producing three primary metabolites: 3,4-dichlorophenylurea, 3-(3,4-dichlorophenyl)-1-methylurea, and 3,4-dichloroaniline. Since the persistence of diuron and its by-products in ecosystems involves risk of toxicity to environment and human health, a reliable quantitative method for simultaneous monitoring of these compounds is required. Hence, a simple method without preconcentration step was validated for quantitation of diuron and its main metabolites by high performance liquid chromatography with ultraviolet detection...
September 2016: Anais da Academia Brasileira de Ciências
Felipe F Frota, Eliane C Truccolo, Carlos A F Schettini
A characterization of the sea level variability at tidal and sub-tidal frequencies at the northern shore of the Brazilian Northeast shelf for the period 2009-2011 is presented. The sea level data used was obtained from the Permanent Geodetic Tide Network from the Brazilian Institute of Geography and Statistics for the Fortaleza gauge station. Local wind data was also used to assess its effects on the low-frequency sea level variability. The variability of the sea level was investigated by classical harmonic analysis and by morphology assessment over the tidal signal...
September 2016: Anais da Academia Brasileira de Ciências
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