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    1922 results match your criteria Anais da Academia Brasileira de Ciencias[Journal]

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    Genetic parameters in female reproductive traits of Nile tilapia (Oreochromis niloticus).
    An Acad Bras Cienc 2017 ;89(3 Suppl):2515-2523
    Programa de Pós-Graduação em Zootecnia, Departamento de Zootecnia, Av. Colombo, 5790, Jd. Universitário, 87020-900 Maringá, PR, Brazil.
    Genetic parameters for reproductive traits in female Nile tilapia were estimated in this study using Bayesian inference method. The data set presented information from 451 Nile tilapia females that were evaluated at two different places in Maringá - Paraná - Brazil (hapas of 1 and 10 m³) and at one location in Alfenas - Minas Gerais - Brazil. A spawning examination was conducted once a week from October 2012 to March 2013 for a total of 23 weeks of evaluation. Read More

    Effect of Syzygium cumini leaves on laying hens performance and egg quality.
    An Acad Bras Cienc 2017 ;89(3 Suppl):2479-2484
    Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal do Ceará, Avenida Mister Hull, 2977, Caixa Postal 12168, 60021-970 Fortaleza, CE, Brazil.
    The aim of this study was to evaluate the effect of Syzygium cumini leaves (SCL) in laying hens diets on productive performance, egg quality and lipid oxidation of yolk. A total of 108 Hysex White laying hens were distributed in a completely randomized design with three treatments and six replicates of six birds each. The treatments consisted of SCL inclusion at dietary levels of 0, 5 and 10 g/kg. Read More

    Potential effects of fungicide and algaecide extracts of Annona glabra L. (Annonaceae) on the microalgae Raphidocelis subcapitata and on the oomycete Pythium.
    An Acad Bras Cienc 2017 ;89(3 Suppl):2101-2111
    Departamento de Botânica, Universidade Federal de São Carlos, Rodovia Washington Luís, SP-310, Km 235, Caixa Postal 676, 13565-905 São Carlos, SP, Brazil.
    Annona glabra L. is a semi-deciduous tree that contains several active substances, including secondary metabolites, with antifungal activity. Phytopathogenic strains of the genus Pythium cause billion dollar losses all over the world on natural and crop species. Read More

    Description of fourth instar larva and pupa of Atrichopogon delpontei Cavalieri and Chiossone (Diptera: Ceratopogonidae) from Brazilian Amazonia.
    An Acad Bras Cienc 2017 ;89(3 Suppl):2081-2094
    División Entomología, Museo de La Plata, CCT-CEPAVE-ILPLA, Paseo del Bosque s/n, 1900 La Plata, Argentina.
    The fourth instar larva and pupa of Atrichopogon delpontei Cavalieri and Chiossone are described for the first time. The immatures were collected from stream margins in the northern Brazilian states Rondônia and Piauí, and subsequently reared to adults. Larvae and pupae are illustrated and photomicrographed. Read More

    A polysaccharide fraction extracted from Pleurotus ostreatus mycelial biomass inhibit Sarcoma 180 tumor.
    An Acad Bras Cienc 2017 ;89(3 Suppl):2013-2020
    Universidade da Região de Joinville/UNIVILLE, Campus Universitário, Zona Industrial, Rua Paulo Malschitzki, 10, 89219-710 Joinville, SC, Brazil.
    Fungi of Pleurotus genus have attracted a great interest due to their medicinal properties such as anti-inflammatory, antimicrobial and antitumor. These properties are attributed mainly to polysaccharides synthesized by Pleurotus. This work aimed to study the mycelial growth of P. Read More

    New azhdarchoid pterosaur (Pterosauria, Pterodactyloidea) with an unusual lower jaw from the Portezuelo Formation (Upper Cretaceous), Neuquén Group, Patagonia, Argentina.
    An Acad Bras Cienc 2017 25;89(3 Suppl):2003-2012. Epub 2017 Sep 25.
    Grupo de Transferencia Proyecto Dino, Universidad Nacional del Comahue, Parque Natural Geo-Paleontológico Proyecto Dino, Ruta Provincial 51, Km 65, Neuquén, Argentina.
    A new azhdarchoid pterosaur from the Upper Cretaceous of Patagonia is described. The material consists of an incomplete edentulous lower jaw that was collected from the upper portion of the Portezuelo Formation (Turonian-Early Coniacian) at the Futalognko site, northwest of Neuquén city, Argentina. The overall morphology of Argentinadraco barrealensis gen. Read More

    Adding palm oil to the diet of sheep alters fatty acids profile on yogurt: Benefits to consumers.
    An Acad Bras Cienc 2017 Oct 26. Epub 2017 Oct 26.
    Instituto de Agronomia do Paraná, Rodovia BR-158, 5517 SR - Bom Retiro, 85501-970 Pato Branco, PR, Brazil.
    The aim of this study was to modify the fatty acid profile of yogurt from sheep milk by the inclusion of different concentrations of palm oil into their diet. Thus, thirty-six sheep during lactation were separated in four groups with nine animals each, as described below: the group T0 (0%); the group T2 (inclusion of 2% of palm oil); the group T4 (inclusion of 4% of palm oil) and the group T6 (inclusion of 6% of palm oil). After 60 days of the supplementation, milk samples were collected and yogurt was produced, which was evaluated regarding the concentration of saturated fatty acids (SFA), monounsaturated fatty acids (MFA), and polyunsaturated fatty acids (PFA). Read More

    Evaluation in vivo of biocompatibility of differents resin-modified cements for bonding orthodontic bands.
    An Acad Bras Cienc 2017 Oct 26. Epub 2017 Oct 26.
    Universidade Estadual da Paraíba/UEPB, Faculdade de Odontologia, Departamento de Patologia Oral, Rua Baraúnas, 351, Universitário, 58429-500 Campina Grande, PB, Brazil.
    The focus of this study was to test the hypothesis that there would be no difference between the biocompatibility of resin-modified glass ionomer cements. Sixty male Wistar rats were selected and divided into four groups: Control Group; Crosslink Group; RMO Group and Transbond Group. The materials were inserted into rat subcutaneous tissue. Read More

    Surface, thermal and hemocompatible properties of novel single stage electrospun nanocomposites comprising polyurethane blended with bio oilTM.
    An Acad Bras Cienc 2017 Oct 26. Epub 2017 Oct 26.
    Department of Physics, Sri Sakthi Institute of Engineering and Technology, Coimbatore 641062, Tamil Nadu, India.
    In this work, the physicochemical and blood compatibility properties of prepared PU/Bio oil nanocomposites were investigated. Scanning electron microscope (SEM) studies revealed the reduction of mean fiber diameter (709 ± 211 nm) compared to the pristine PU (969 nm ± 217 nm). Fourier transform infrared spectroscopy (FTIR) analysis exposed the characteristic peaks of pristine PU. Read More

    Three decades of reference evapotranspiration estimates for a tropical watershed in the eastern Amazon.
    An Acad Bras Cienc 2017 Oct 26. Epub 2017 Oct 26.
    Programa de Pós-Graduação em Ciências Ambientais, Universidade Federal do Pará, Instituto Geociências, Av. Augusto Correa, 1 Guamá, 66075-110 Belém, PA, Brazil.
    This study estimated the reference evapotranspiration rate (ETo) for the Itacaiúnas River Watershed (IRW), Eastern Amazonia, and measured the accuracy of eight empirical equations: Penman-Monteith (PM), Priestley-Taylor (PT), Hargreaves and Samani (HS), Camargo (CAM), Thornthwaite (TH), Hamon (HM), Kharrufa (KF) and Turc (TC) using monthly data from 1980 to 2013. In addition, it verifies the regional applicability to the IRW using a for the Marabá-PA station. The methods TC and PM (FAO56) presented the best results, which demonstrate that radiation and higher temperatures are the dominant drivers in the Evapotranspiration process, while relative humidity and wind speed have a much smaller impact. Read More

    Morphology of the axial skeleton of seven bat genera (Chiroptera: Phyllostomidae).
    An Acad Bras Cienc 2017 Oct 26. Epub 2017 Oct 26.
    Programa de Investigaciones de Biodiversidad Argentina/PIDBA, Programa de Conservación de los Murciélagos de Argentina/ PCMA, Facultad de Ciencias Naturales e IML, Universidad Nacional de Tucumán, Consejo Nacional de Investigaciones Científicas y Técnicas/ CONICET, PJG, RMB, MMD, Fundación Miguel Lillo (MMD), Miguel Lillo 205, 4000, Tucumán, Argentina.
    Here we present detailed descriptions and comparisons of the axial skeleton of seven species of bats belonging to five subfamilies of Phyllostomidae of different trophic guilds. The material examined consisted of 34 complete skeletons of seven species. For five of the studied species, previous descriptions have not been conducted, and for the vampires only limited information is available, so that descriptions for these species are here completed. Read More

    Antimicrobial and enzymatic activity of anemophilous fungi of a public university in Brazil.
    An Acad Bras Cienc 2017 Oct 26. Epub 2017 Oct 26.
    Departamento de Micologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, 1235, Cidade Universitária, 50670-901 Recife, PE, Brazil.
    To the fungal microbiota the UFPE and biotechnological potential enzymatic and antimicrobial production. Air conditioned environments were sampled using a passive sedimentation technique, the air I ratio and the presence of aflatoxigenic strains evaluated for ANVISA. Icelles were to determine the enzymatic activity of lipase, amylase and protease metabolic liquids to determine antimicrobial activity. Read More

    A New Acetylcholinesterase Inhibitor from Green Glycosylation of Trachyloban-19-oic Acid by Mucor plumbeus.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil.
    The in vitro metabolism of a widespread natural product, trachyloban-19-oic acid (1), by the fungal species Mucor plumbeus was studied in a sucrose-yeast liquid medium. Two products were isolated, and their structures were determined by spectroscopic means as 7β-hydroxytrachyloban-19-oic acid (5) and trachyloban-19-O-β-D-glucopyranosyl ester (6). To the best of our knowledge, compound 6 is herein reported by the first time in the literature. Read More

    Elemental composition of vegetables cultivated over coal-mining waste.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Laboratório Biologia Celular e Molecular, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense/UNESC, Avenida Universitária, 1105, Bairro Universitário, 88806-000 Criciúma, SC, Brazil.
    We assessed elemental composition of the liver in mice subjected to one-time or chronic consumption of the juice of vegetables cultivated in a vegetable garden built over deposits of coal waste. Lactuca sativa L. (lettuce), Beta vulgaris L. Read More

    Moderate pathogenic effect of Ligophorus uruguayense (Monogenoidea, Ancyrocephalidae) in juvenile mullet Mugil liza (Actinopterygii, Mugilidae) from Brazil.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Laboratório de Parasitologia de Organismos Aquáticos, Universidade Federal do Rio Grande/FURG, Rua do Hotel, 2, 96210-030 Rio Grande, RS, Brazil.
    Monogenoidea pathogenic activity can elicit various histological responses in fish. Species of Ligophorus are specific parasites of mullets, and its relationship with host fish may result in a moderate pathogenic action. In order to ascertain this relationship, estuarine mullets (Mugil liza) were collected in an estuary, reared in laboratory, for three weeks, and forwarded for histological and parasitological analyses. Read More

    Use of performance indicators to assess the solid waste management of health services.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Departamento de Engenharias e Tecnologias, Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo, Rodovia BR 101 Norte, Km 60, 29932-540 São Mateus, ES, Brazil.
    Modern society faces serious challenges, among them, the complexity of environmental problems. Thus, there are several possible sources of environmental degradation, however, the waste produced by health services have an important peculiarity due to its toxic or pathogenic characteristics, since when managed improperly provide also health risk public. The involvement of solid waste from healthcare services environmental impact integrates matters a little more complex, because in addition to environmental health, they also interfere with the healthiness of environments that generate, with the consequences of nosocomial infections, occupational health and public. Read More

    Peculiar anatomical traits, high durability, and potential ornamental use of Cyclanthaceae as fresh foliage.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Programa de Biología, Universidad CES, Medellín, Calle 10 A No. 22-4, Antioquia, Colombia.
    Wild plant species with potential for use as ornamental green foliage are often reported. Nevertheless, there are few studies evaluating morphological and anatomical aspects associated with this use. Preliminary trials suggest that the species of Sphaeradenia (Sander ex Mast. Read More

    Cryopreservation of banana's cv Grand Naine in vitro rhizomes.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Universidade Federal do Ceará, Departamento de Ciências Agrárias, Av. Mister Hull, 2977, 60356-001 Fortaleza, CE, Brazil.
    The preservation of banana genetic material is usually performed through seedlings. However, most banana cultivars do not produce seed and are propagated vegetatively. Therefore, cryopreservation is a feasible technique that allows the preservation of banana genotypes indefinitely. Read More

    Paleoenvironmental evolution of the coastal plain of Southern Brazil: palynological data from a Holocene core in Santa Catarina State.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Programa de Pós-Graduação em Geociências, Universidade Federal do Rio Grande do Sul/UFRGS, Instituto de Geociências, Departamento de Paleontologia e Estratigrafia, Laboratório de Palinologia Marleni Marques Toigo, Av. Bento Gonçalves, 9500, 91540-000 Porto Alegre, RS, Brazil.
    This paper presents a paleoenvironmental reconstruction from palynological analyses of a sedimentary core of Holocene age, drilled at municipality of Garopaba (Santa Catarina), Southern Brazil. A total of 46 samples was collected for palynological analyses in the 450 cm-long core PCSC-3, as also three samples for radiocarbon dating and granulometric analyses. The palynological content includes 84 taxa related to pollen grains of angiosperms (38) and gimnosperm (3), spores of pteridophyta (16) and bryophyta (2), spores of fungi (8), algae (3), acritarchs (3), dinoflagellate cysts (2) and microforaminiferal linings (1). Read More

    Parasitic communities of Hoplosternum littorale (Hancock, 1828) as indicators of environmental impact.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Universidade do Sagrado Coração, Central de Ciência e Tecnologia Ambiental, Rua Irmã Arminda, 10-50, 17011-160 Bauru, SP, Brazil.
    The parasites are indicative of several biological aspects of their hosts, including their diet, migration, recruitment and phylogeny, but they can also be direct indicators of the environmental quality. Hoplosternum littorale is a fish that has a high commercial value in some South American countries. The fishes were collected from January to July 2012, in two locations of the Peixe River in the municipality of Anhembi, State of São Paulo, Brazil, which had different environmental and limnological characteristics (river mouth and Lagoa Cabeça de Boi). Read More

    The conservation of native priority medicinal plants in a Caatinga area in Ceará, northeastern Brazil.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Universidade Regional do Cariri, Departamento de Biologia, Laboratório de Ecologia Vegetal, Centro de Ciências Biológicas e da Saúde, Rua Cel. Antônio Luiz, 1161, Pimenta, 63105-000 Crato, CE, Brazil.
    Much of the Brazilian semiarid region faces a considerable process of degradation of natural resources, and ethnobotanical studies have collaborated with important information about the use and traditional knowledge, serving as a tool to design conservation strategies of native plant species. Thus, this study aimed to determine medicinal species meriting conservation priorities in a "Caatinga" area in the northeastern of Brazilian territory. The ethnobotanical data were collected through semi-structured interviews with key subjects selected through the "snowball" technique. Read More

    Latin American scientific contribution to ecology.
    An Acad Bras Cienc 2017 Oct 23. Epub 2017 Oct 23.
    Pós-Graduação em Ecologia e Conservação, Universidade Federal do Paraná, Av. Coronel Francisco H. dos Santos, 100, Jardim das Américas, 81531-990 Curitiba, PR, Brazil.
    Latin America embodies countries of special interest for ecological studies, given that areas with great value for biodiversity are located within their territories. This highlights the importance of an evaluation of ecological research in the Latin America region. We assessed the scientific participation of Latin American researchers in ecological journals, patterns of international collaboration, and defined the main characteristics of the articles. Read More

    Purification and characterization of a thermostable alkaline cellulase produced by Bacillus licheniformis 380 isolated from compost.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Rua Sarmento Leite, 500, 90050-170 Porto Alegre, RS, Brazil.
    During composting processes, the degradation of organic waste is accomplished and driven by a succession of microbial populations exhibiting a broad range of functional competencies. A total of 183 bacteria, isolated from a composting process, were evaluated for cellulase activity at different temperatures (37, 50, 60, and 70°C) and pH values. Out of the 22 isolates that showed activity, isolate 380 showed the highest cellulase activity. Read More

    Beneficial effects of bio-controlling agent Bacillus cereus IB311 on the agricultural crop production and its biomass optimization through response surface methodology.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Department of Biotechnology, Gauhati University, Guwahati, 781014, Assam, India.
    Disease in agricultural field is a big problem that causes a massive loss in production. In this present investigation, we have reported a soil-borne bacterium Bacillus cereus IB311 which is antagonistic to plant pathogens (Pseudomonas syringae and Agrobacterium tumefaciens), and could make a substantial contribution to the prevention of plant diseases. To prove the practical application, the strain was directly applied in agricultural field. Read More

    Carbon dioxide/methanol conversion cycle based on cascade enzymatic reactions supported on superparamagnetic nanoparticles.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Supramolecular NanotechLab, Instituto de Quimica, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil.
    The conversion of carbon dioxide into important industrial feedstock is a subject of growing interest in modern society. A possible way to achieve this goal is by carrying out the CO2/methanol cascade reaction, allowing the recycle of CO2 using either chemical catalysts or enzymes. Efficient and selective reactions can be performed by enzymes; however, due to their low stability, immobilization protocols are required to improve their performance. Read More

    Generation of a triple-fluorescent mouse strain allows a dynamic and spatial visualization of different liver phagocytes in vivo.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil.
    Resident and circulating immune cells have been extensively studied due to their almost ubiquitous role in cell biology. Despite their classification under the "immune cell department", it is becoming increasingly clear that these cells are involved in many different non-immune related phenomena, including fetus development, vascular formation, memory, social behavior and many other phenotypes. There is a huge potential in combining high-throughput assays - including flow cytometry and gene analysis - with in vivo imaging. Read More

    In vitro antiparasitic activity and chemical composition of the essential oil from Protium ovatum leaves (Burceraceae).
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Instituto Federal de Educação, Ciência e Tecnologia do Sul de Minas Gerais, Campus Pouso Alegre, Av. Maria da Conceição Santos, 900, Parque Real, 37550-000 Pouso Alegre, MG, Brazil.
    Leishmaniasis and trypanosomiasis are globally widespread parasitic diseases which have been responsible for high mortality rates. Since drugs available for their treatment are highly hepatotoxic, nephrotoxic and cardiotoxic, adherence to therapy has been affected. Thus, the search for new, more effective and safer drugs for the treatment of these diseases is necessary. Read More

    Evaluation of embryotoxic and embryostatic effects of the aqueous extract of Rhizophora mangle and tannic acid on eggs and larvae of Aedes aegypti.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Departamento de Histologia e Embriologia, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50760-420, Recife, PE, Brazil.
    Rhizophora mangle is an abundant plant in mangroves and tannic acid is a polyphenol produced by the secondary metabolism of plants. The aim of the study was to evaluate the embryotoxic and embriostatic effects of the aqueous extract of R. mangle and synthetic tannic acid on eggs and larvae of Aedes aegypti. Read More

    Replacing soybean oil with increasing levels of soybean acid oil in diets of coturnix quails (Coturnix coturnix coturnix) and the effects on egg quality.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Departamento de Zootecnia, Av. Eliseu Maciel, Campus Universitário, s/n, Caixa Postal 354, 96010-900 Capão do Leão, RS, Brazil.
    The effects of increasing levels of soybean acid oil in diets of quails on the quality of eggs were evaluated over a period of 56 days. A completely randomized design with five treatment levels of soybean acid oil (0, 2, 4, 6, and 8%) as a replacer for soybean oil and eight replicates of two quails each were used. A total of 240 fresh eggs were used for quality analysis, and 400 eggs were stored at 23ºC over a period of 0, 7, 14, 21, and 28 days for analysis of shelf-life. Read More

    Mini-incubators improve the adventitious rooting performance of Corymbia and Eucalyptus microcuttings according to the environment in which they are conditioned.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Federal University of Paraná, Department of Bioprocess Engineering and Biotechnology, Coronel Francisco H. dos Santos, 100, Jardim das Américas, 81531-990 Curitiba, PR, Brazil.
    We addressed a major challenge in the in vitro clonal propagation of Corymbia citriodora, Eucalyptus urophylla and E. benthamii by using an ex vitro adventitious rooting strategy in a mini-incubator. Mini-incubators were placed in four environments for rooting. Read More

    Two new species and updated checklist of Oxyethira Eaton, 1873 (Trichoptera, Hydroptilidae) from Brazil.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Programa de Pós-Graduação em Zoologia, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, São Cristóvão, 20940-040 Rio de Janeiro, RJ, Brazil.
    Two new species of Oxyethira Eaton, 1873 are described: Oxyethira cascadanta sp. n. and Oxyethira quadrilobata sp. Read More

    Comparative pollen morphological analysis in the subgenera Passiflora and Decaloba.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Embrapa Mandioca e Fruticultura, Rua Embrapa, s/n, Chapadinha, C.P. 007, 44380-000 Cruz das Almas, BA, Brazil.
    The genus Passiflora is the most diversified of the Passifloraceae, and its palynology presents wide morphological variability. The objective of the study was to evaluate the pollen morphology of 18 Passiflora species in order to identify informative pollinic characteristics to contribute to the taxonomic classification of the genus. The morphology of the pollen grains and the exine structure were investigated using light microscopy and scanning electron microscopy. Read More

    Drought monitoring in the Brazilian Semiarid region.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Centro Nacional de Monitoramento e Alertas de Desastres Naturais/CEMADEN, Estrada Dr. Altino Bondesan, 500, Distrito de Eugênio de Melo, 12247-016 São José dos Campos, SP, Brazil.
    Drought is a natural and recurrent phenomenon. It is considered 'a natural disaster' whenever it occurs in an intensive manner in highly populated regions, resulting in significant damage (material and human) and loss (socioeconomic). This paper presents the efforts developed to monitor the impact of drought in the semiarid region of Northeast Brazil. Read More

    Minimum free energy predicted base pairing in the 39 nt spliced leader and 5' UTR of calmodulin mRNA from Trypanosoma cruzi: influence of the multiple trans-splicing sites.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fiocruz, Av. Brasil, 4365, 21040-360 Rio de Janeiro, RJ, Brazil.
    We analyzed the compositional changes and the stable base pairs in the predicted secondary structure of the 5' UTR calmodulin mRNA in T. cruzi. The three copies of calmodulin in T. Read More

    Antibiotic activity of Plectranthus ornatus Codd., a Traditional Medicinal Plant.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Avenida Peter Henry Rolfs, s/n, Campus Universitário, 36570-900 Viçosa, MG, Brazil.
    The dichloromethane extract of Plectranthus ornatus Codd., a tradicional medicinal plant, showed antibiotic activity with minimum inhibitory concentration (MIC) values of 0.4 mg. Read More

    Potassium adsorption in soil cultivated with sugarcane.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Programa de Pós-Graduação em Tecnologias Energéticas e Nucleares, DEN-UFPE, Av. Prof. Luiz Freire, 1000, 50740-545 Recife, PE, Brazil.
    Vinasse is a byproduct of the process of distillation of sugarcane juice for the manufacture of sugar and alcohol. Because it is rich in nutrients, mainly potassium (K), is used as fertilizer and applied via fertigation, without concerning for the fate of this compound in the soil. Thus, the objective of the study was to evaluate the interactions of the potassium ion (K+), applied via vinasse in a soil representative of the sugarcane zone of the State of Pernambuco using adsorption isotherms. Read More

    Species richness and composition of epiphytic bryophytes in flooded forests of Caxiuanã National Forest, Eastern Amazon, Brazil.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, 66077-530 Belém, PA, Brazil.
    This study aimed to compare the richness and composition of the epiphytic bryoflora between várzea and igapó forests in Caxiuanã National Forest, Brazilian Amazon. Bryophytes were collected on 502 phorophytes of Virola surinamensis. Average richness per phorophyte and composition between forests and between dry and rainy periods was tested by two-way analysis and by cluster analysis, respectively. Read More

    Implementation of dental specialty centers: a descriptive analysis of the current status in the Brazilian territory.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Universidade Federal de Sergipe, Departamento de Odontologia, Av. Governador Marcelo Deda Chagas, 13, São José, 49400-000 Lagarto, SE, Brazil.
    This study aimed to assess the current implementation status of Dental Specialty Centers (Centros de Especialidades Odontológicas - CEO) in Brazil. The sample included CEOs implemented up to November 2015 in the 27 Brazilian federative units. Data were obtained directly from the database of the Informatics Department of the Brazilian Unified Health System, according to the National Registry of Health Facilities (NRHF) of Dental Specialty Centers of all Brazilian regions. Read More

    Diversity of parasites in wild Astronotus ocellatus (Perciformes, Cichlidae), an ornamental and food fish in Brazil.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Programa de Pós-Graduação em Biodiversidade e Biotecnologia - PPGBIONORTE, Universidade Federal do Amapá/UNIFAP, Rodovia Juscelino Kubitschek, s/n, 68903-419 Macapá, AP, Brazil.
    The community composition of parasites was characterized in Astronotus ocellatus from a tributary of the Amazon River, northern Brazil. The prevalence was 87.9%, and a total of 526,052 parasites were collected, with a mean of 15,941 parasites per host. Read More

    Evaluation of the anti-osteoporotic effect of Ginkgo biloba L. in Wistar rats with glucocorticoid-induced-osteoporosis by bone densitometry using dual-energy x-ray absorptiometry (DEXA) and mechanical testing.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    Centro de Biologia da Reprodução, Universidade Federal de Juiz de Fora/UFJF, São Pedro, Caixa Postal 328, 36001-970 Juiz de Fora, MG, Brazil.
    Evaluate the effect of the extract of Ginkgo biloba in the bone alkaline phosphatase, bone mineral density, in the mechanical properties of the tibia in rats with glucocorticoid-induced-osteoporosis. After osteoporosis induction, the rats were divided into five groups: Osteoporosis; EGb1 (28 mg/Kg); EGb2 (56 mg/Kg); alendronate (0.2 mg/animal) and control. Read More

    Effect of carbon source on production, characterization and bioactivity of exopolysaccharide produced by Phellinus vaninii Ljup.
    An Acad Bras Cienc 2017 Oct 16. Epub 2017 Oct 16.
    College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002 Henan, P.R. China.
    The effect on different three carbon source (i.e. glucose, fructose and sucrose) on production, chemical characterization and antioxidant activity of exopolysaccharide (EPS) produced by Phellinus vaninii Ljup was investigated in this study. Read More

    Hybrid Geoid Model: Theory and Application in Brazil.
    An Acad Bras Cienc 2017 Jul-Sep;89(3):1943-1959
    Instituto de Geografia, Universidade Federal de Uberlândia/UFU, Campus Monte Carmelo, Av. Goiás, 2000, 38500-000 Monte Carmelo, MG, Brazil.
    Determination of the ellipsoidal height by Global Navigation Satellite Systems (GNSS) is becoming better known and used for purposes of leveling with the aid of geoid models. However, the disadvantage of this method is the quality of the geoid models, which degrade heights and limit the application of the method. In order to provide better quality in transforming height using GNSS leveling, this research aims to develop a hybridization methodology of gravimetric geoid models EGM08, MAPGEO2015 and GEOIDSP2014 for the State of São Paulo, providing more consistent models with GNSS technology. Read More

    Sampling procedures for inventory of commercial volume tree species in Amazon Forest.
    An Acad Bras Cienc 2017 Jul-Sep;89(3):1829-1840
    Engenharia Florestal, Universidade Federal do Paraná/UFPR, Av. Prof. Lothário Meissner, 632, Jardim Botânico, 80210-170 Curitiba, PR, Brazil.
    The spatial distribution of tropical tree species can affect the consistency of the estimators in commercial forest inventories, therefore, appropriate sampling procedures are required to survey species with different spatial patterns in the Amazon Forest. For this, the present study aims to evaluate the conventional sampling procedures and introduce the adaptive cluster sampling for volumetric inventories of Amazonian tree species, considering the hypotheses that the density, the spatial distribution and the zero-plots affect the consistency of the estimators, and that the adaptive cluster sampling allows to obtain more accurate volumetric estimation. We use data from a census carried out in Jamari National Forest, Brazil, where trees with diameters equal to or higher than 40 cm were measured in 1,355 plots. Read More

    Antidiarrheal activity of extracts from Maytenus gonoclada and inhibition of Dengue virus by lupeol.
    An Acad Bras Cienc 2017 Jul-Sep;89(3):1555-1564
    Universidade Federal de Minas Gerais, Departamento de Química, Instituto de Ciências Exatas, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil.
    Diarrhea is an infectious disease caused by bacterial, virus, or protozoan, and dengue is caused by virus, included among the neglected diseases in several underdeveloped and developing countries, with an urgent demand for new drugs. Considering the antidiarrheal potential of species of Maytenus genus, a phytochemical investigation followed by antibacterial activity test with extracts of branches and heartwood and bark of roots from Maytenus gonoclada were conducted. Moreover, due the frequency of isolation of lupeol from Maytenus genus the antiviral activity against Dengue virus and cytotoxicity of lupeol and its complex with β-cyclodextrins were also tested. Read More

    Assigning dates and identifying areas affected by fires in Portugal based on MODIS data.
    An Acad Bras Cienc 2017 Jul-Sep;89(3):1487-1501
    Oregon State University, College of Forestry, Department of Forest Engineering, Resources and Management, 280, Peavy Hall, Corvallis, OR, 97331, USA.
    An automated procedure is here presented that allows identifying and dating burned areas in Portugal using values of daily reflectance from near-infrared and middle-infrared bands, as obtained from the MODIS instrument. The algorithm detects persistent changes in monthly composites of the so-called (V,W) Burn-Sensitive Index and the day of maximum change in daily time series of W is in turn identified as the day of the burning event. The procedure is tested for 2005, the second worst fire season ever recorded in Portugal. Read More

    The last dinosaurs of Brazil: The Bauru Group and its implications for the end-Cretaceous mass extinction.
    An Acad Bras Cienc 2017 Jul-Sep;89(3):1465-1485
    Petróleo Brasileiro S.A. (PETROBRAS), Av. República do Chile, 330, 17˚ andar, Centro, 20031-170 Rio de Janeiro, RJ, Brazil.
    The non-avian dinosaurs died out at the end of the Cretaceous, ~66 million years ago, after an asteroid impact. The prevailing hypothesis is that the effects of the impact suddenly killed the dinosaurs, but the poor fossil record of latest Cretaceous (Campanian-Maastrichtian) dinosaurs from outside Laurasia (and even more particularly, North America) makes it difficult to test specific extinction scenarios. Over the past few decades, a wealth of new discoveries from the Bauru Group of Brazil has revealed a unique window into the evolution of terminal Cretaceous dinosaurs from the southern continents. Read More

    Physical and chemical study of lattice kaolinites and their interaction with orthophosphate.
    An Acad Bras Cienc 2017 Jul-Sep;89(3):1391-1401
    Universidade Federal do Amazonas, Instituto de Ciências Exatas, Departamento de Química, Campus Artur Virgilio Filho, Setor Norte, Av. Gal. Rodrigo Octávio, 6200, Coroado I, 69077-000 Manaus, AM, Brazil.
    This study covers the evaluation of the structure and the capacity in adsorbing orthophosphate ions of kaolinites collected from sampling sites in Manaus (Brazil). The kaolinites were obtained using physical fractioning (sieving/siphoning) techniques and chemical treatment with HCl, H2SO4, H2O2 and KCl. The investigation of the kaolinite lattices involved the Hinckley and Plançon indexes determined from X-ray diffraction data, Fourier transformed infrared spectroscopy, scanning electron microscopy and Mössbauer spectroscopy. Read More

    A new model for describing remission times: the generalized beta-generated Lindley distribution.
    An Acad Bras Cienc 2017 Jul-Sep;89(3):1343-1367
    Departamento de Estatística, Universidade Federal de Pernambuco, Cidade Universitária, Av. Prof. Moraes Rego, 1235, 50740-540 Recife, PE, Brazil.
    New generators are required to define wider distributions for modeling real data in survival analysis. To that end we introduce the four-parameter generalized beta-generated Lindley distribution. It has explicit expressions for the ordinary and incomplete moments, mean deviations, generating and quantile functions. Read More

    Predicting of biomass in Brazilian tropical dry forest: a statistical evaluation of generic equations.
    An Acad Bras Cienc 2017 Jul-Sep;89(3):1815-1828. Epub 2017 Aug 23.
    Laboratório de Manejo de Florestas Naturais "José Serafim Feitosa Ferraz", Universidade Federal Rural de Pernambuco, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, 52171-900 Recife, PE, Brazil.
    Dry tropical forests are a key component in the global carbon cycle and their biomass estimates depend almost exclusively of fitted equations for multi-species or individual species data. Therefore, a systematic evaluation of statistical models through validation of estimates of aboveground biomass stocks is justifiable. In this study was analyzed the capacity of generic and specific equations obtained from different locations in Mexico and Brazil, to estimate aboveground biomass at multi-species levels and for four different species. Read More

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