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Anais da Academia Brasileira de Ciências

Estela R Queiroz, Celeste M P DE Abreu, Denise A Rocha, Raimundo V DE Sousa, Rodrigo M Fráguas, Mariana A Braga, Pedro H S César
Dyslipidemias are associated with the incidence of cardiovascular diseases, obesity, diabetes, hypertension and hepatic steatosis, being the cause of morbidity and mortality. This study investigated the effects of lychee peel flour (PF) on serum levels of total cholesterol (TC), low-density lipoprotein (LDL-c), triacylglycerols (TAG) and various parameters related to obesity, in rats fed a hypercholesterolemic diet. Therefore, 20 male rats were used. In the first 21 days, the animals were fed a hypercholesterolemic diet, except for control group...
December 11, 2017: Anais da Academia Brasileira de Ciências
Sheila N DE Oliveira, Ricardo P Ribeiro, Carlos A L DE Oliveira, Luiz Alexandre Filho, Aline M S Oliveira, Nelson M Lopera-Barrero, Victor F A Santander, Renan A C Santana
In this paper, the existence of a genotype x environment interaction for the average daily weight in GIFT Nile tilapia (Oreochromis niloticus) in different regions in the state of Paraná (Brazil) was analyzed. The heritability results were high in the uni-characteristic analysis: 0.71, 0.72 and 0.67 for the cities of Palotina (PL), Floriano (FL) and Diamond North (DN), respectively. Genetic correlations estimated in bivariate analyzes were weak with values between 0.12 for PL-FL, 0.06 for PL and 0.23 for DN-FL-DN...
December 11, 2017: Anais da Academia Brasileira de Ciências
Junir A Lutinski, Cladis J Lutinski, Carin Guarda, Maria A Busato, Flávio R M Garcia
Ant diversity is influenced by the structural complexity of the environment. Ants are thus an ecologically important group due to their potential to serve as indicators of environmental quality. The objective of this study was to evaluate ant diversity in areas with different land use histories and thus, within different stages of regeneration in the Permanent Preservation Area of the Foz do Chapecó Hydroelectric Plant reservoir. Ant assemblies among sample sites were compared using rarefaction analysis, and estimated richness, frequency of occurrence, and relative abundance were calculated...
December 11, 2017: Anais da Academia Brasileira de Ciências
Joel M P Cordeiro, Miriam Kaehler, Gustavo Souza, Leonardo P Felix
Chromosome numbers and heterochromatin banding pattern variability have been shown to be useful for taxonomic and evolutionary studies of different plant taxa. Bignonieae is the largest tribe of Bignoniaceae, composed mostly by woody climber species whose taxonomies are quite complicated. We reviewed and added new data concerning chromosome numbers in Bignonieae and performed the first analyses of heterochromatin banding patterns in that tribe based on the fluorochromes chromomycin A3 (CMA) and 4'-6-diamidino-2-phenylindole (DAPI)...
December 11, 2017: Anais da Academia Brasileira de Ciências
Audrey M Dos Reis, Ana V G Fruchtenicht, Luiza C DE Athaydes, Sérgio Loss, Luis Fernando Moreira
Biochemical markers produced by the affected organ or body in response to disease have gained high clinical value due to assess disease development and being excellent predictors of morbidity and mortality. The aim of this study is to analyze different biochemical markers in critically cancer patients and to determine which of them can be used as predictors of mortality. This is a prospective, cross-sectional study conducted at a University Hospital in Porto Alegre - RS. Screening was done to include patients in the study...
December 11, 2017: Anais da Academia Brasileira de Ciências
Fábio V DE Araújo, Marcelle C M Netto, Gustavo P Azevedo, Marcelly M A Jayme, Monica C Nunes-Carvalho, Mariana M Silva, Flávia L DO Carmo
Marine sponges has been a large reservoir of microbial diversity, with the presence of many species specific populations as well as producing biologically active compounds, which has attracted great biotechnological interest. In order to verify the influence of the environment in the composition of the bacterial community present in marine sponges and biotechnological potential of bacteria isolated from these organisms, three species of sponges and the waters surrounding them were collected in different beaches of Rio de Janeiro, Brazil...
December 11, 2017: Anais da Academia Brasileira de Ciências
Maurício J Fornazier, David S Martins, Maria Cristina G DE Willink, Victor D Pirovani, Paulo S F Ferreira, José C Zanuncio
Coffee is one of the most important Brazilian agricultural commodities exported, and Minas Gerais and Espírito Santo States are the main coffee producers. Scale insects are important coffee pests, and 73 species of Cerococcidae (3), Coccidae (18), Diaspididae (6), Eriococcidae (1), Ortheziidae (3), Pseudococcidae (21), Putoidae (2) and Rhizoecidae (19) have been associated with roots, branches, leaves, flowers and fruits of Arabica coffee in the Neotropics. Eight species were found associated with Arabica coffee in Minas Gerais and Espírito Santo States in this study, and Coccidae was the most frequent family...
December 11, 2017: Anais da Academia Brasileira de Ciências
Matheus C Bianchini, Dennyura O Galvão, Tatiana Tamborena, Claudia O Alves, Robson L Puntel
Mentha pulegium (Lamiaceae) tea has been used as a traditional medicine; however, the modulatory effect of M. pulegium extracts on damage to human erythrocytes associated to t-butyl hydroperoxide (t-BHP) exposure remains to be investigated. Accordingly, we perform this study in order to test the hypothesis that aqueous and ethanolic extracts of M. pulegium could modulate the hemolysis associated to t-BHP exposure, non-protein thiol (NPSH) oxidation and lipid peroxidation (measured as thiobarbituric acid reactive substances - TBARS) in human erythrocytes...
December 11, 2017: Anais da Academia Brasileira de Ciências
Mayke B Costa, Luis Fernando T DE Menezes, Marcelo T Nascimento
Seasonally dry tropical forest is one of the highly threatened biome. However, studies on the effect of fire on these tree communities are still scarce. In this context, a floristic and structural survey in three forest areas in the southeast of Brazil that were affected by fire between 14 and 25 years ago was performed with the objective of evaluating post-fire regeneration. In each site, five systematically placed plots (25 m x 25 m each) were established. The more recently burnt site had significantly lower values of richness and diversity than the other two sites...
December 11, 2017: Anais da Academia Brasileira de Ciências
Shayana DE Jesus, Wagner A Pedro, Arthur A Bispo
Understanding the factors that affect biodiversity is of central interest to ecology, and essential to species conservation and ecosystems management. We sampled bird communities in 17 forest fragments in the Cerrado biome, the Central-West region of Brazil. We aimed to know the communities structure pattern and the influence of geographical distance and environmental variables on them, along a gradient of fragmented habitats at both local and landscape scales. Eight structural variables of the fragments served as an environmental distance measurement at the local scale while five metrics served as an environmental distance measurement at the landscape scale...
December 11, 2017: Anais da Academia Brasileira de Ciências
Eduarda D R Dourado, Ruth L Ferreira-Keppler, Renato T Martins, Maria M Ronderos
We assessed the immature stages of Ceratopogonidae (Diptera) in artificial containers in an urban forest fragment in Manaus (Brazil), including their behavioral, biological and ecological information. In addition, we evaluated the effects of deforestation in an open and forested area on Ceratopogonidae communities. Immatures were sampled between August 2012 and July 2014 in artificial containers installed in both habitat types. We collected 685 immatures of seven morpho-species of Bezzia Kieffer, Culicoides Latreille, Dasyhelea Kieffer, Forcipomyia Meigen, and Palpomyia Meigen...
December 11, 2017: Anais da Academia Brasileira de Ciências
Zulmira A S Guimarães, Renato A Damatta, Renan S Guimarães, Marcello Filgueira
With the aim of introducing permanent prostheses with main properties equivalent to cortical human bone, Ti-diamond composites were processed through powder metallurgy. Grade 1 titanium and mixtures of Ti powder with 2%, 5% and 10 wt% diamond were compacted at 100MPa, and then sintered at 1250°C/2hr/10-6mbar. Sintered samples were studied in the point of view of their microstructures, structures, yield strength and elastic modulus. The results showed that the best addition of diamonds was 2 wt%, which led to a uniform porosity, yield strength of 370MPa and elastic modulus of 13...
December 11, 2017: Anais da Academia Brasileira de Ciências
Flaviane G Pereira, Ronaldo Marquete, Levy T Domingos, Marco E N Rocha, Antonio Ferreira-Pereira, Elisabeth Mansur, Davyson L Moreira
Casearia genus (Salicaceae) is found in sub-tropical and tropical regions of the world and comprises about 160-200 species. It is a medicinal plant used in South America, also known as "guaçatonga", "erva-de-tiú", "cafezinho-do-mato". In Brazil, there are about 48 species and 12 are registered in the State of Rio de Janeiro, including Casearia sylvestris Sw. There are many studies related to the chemical profile and cytotoxic activities of extracts from these plants, although few studies about the antifungal potential of the essential oil have been reported...
December 11, 2017: Anais da Academia Brasileira de Ciências
Cristhyane M Freita, Lidyane A Freita, Leticia F Tralli, Aline F Silva, Franciele Q Mendes, Vitor Teixeira, Marcia J R Mutton
One of the most important steps is to clarify the juice, which are added synthetic polymer acrylamide base, aiming the fast settling of impurities present in the juice. However, this input is expensive and may have carcinogenic and neurotoxic actions to humans. The search for new natural flocculants that have similarity with the commercial product is of great value. A bioextract that may be promising and has coagulant action is the Moringa oleifera Lam. In this context, the objective of the research was to evaluate the consequences of the use of moringa seed extracts and various concentrations of commercial polymer, such as sedimentation aids in clarifying sugarcane juice in the ethanol production, comparing the efficiency of the bioextract moringa...
December 11, 2017: Anais da Academia Brasileira de Ciências
Fernanda P A P Bortolheiro, Marcelo A Silva
Water deficit is one of the major stresses affecting plant growth and productivity worldwide. Plants induce various morphological, physiological, biochemical and molecular changes to adapt to the changing environment. Safflower (Carthamus tinctorius L.), a potential oil producer, is highly adaptable to various environmental conditions, such as lack of rainfall and temperatures. The objective of this work was to study the physiological and production characteristics of six safflower lines in response to water deficit followed by rehydration...
December 7, 2017: Anais da Academia Brasileira de Ciências
Claudiana M Dos Santos, Laurício Endres, Vilma M Ferreira, José V Silva, Eduardo V Rolim, Humberto C L Wanderley Filho
Castor bean is one of the crops with potential to provide raw material for production of oils for biodiesel. This species possess adaptive mechanisms for maintaining the water status when subjected to drought stress. A better understanding these mechanisms under field conditions can unravel the survival strategies used by this species. This study aimed to compare the physiological adaptations of Ricinus communis (L.) in two regions with different climates, the semi-arid and semi-humid subject to water stress...
December 7, 2017: Anais da Academia Brasileira de Ciências
Alessandro A L S Silva, Ademir Franco, Ângela Fernandes, Claudio Costa, Jorge S Barbosa, Fernando H Westphalen
The present study aimed to assess the accuracy of linear measurements performed with two software packages in multislice (MSCT) and cone beam (CBCT) computed tomography (CT) images. The sample consisted of 10 human mandibles marked standardly 8 times with metallic orthodontic wires. The mandibles underwent both MSCT and CBCT scanning and were measured linearly and digitally with two software packages, namely Studio 3.1® (Anne Solutions®, SP, Brazil) (ST) and Implant Viewer 2.817® (Anne Solutions®, SP, Brazil) (IV)...
December 7, 2017: Anais da Academia Brasileira de Ciências
Virginia C Rech, Nathana J Mezzomo, Genaro A Athaydes, Luciane R Feksa, Vandré C Figueiredo, Adriana Kessler, Itiane D DE Franceschi, Clovis M D Wannmacher
Considering that thiol-containing enzymes like kinases are critical for several metabolic pathways and energy homeostasis, we investigated the effects of cystine dimethyl ester and/or cysteamine administration on kinases crucial for energy metabolism in the kidney of Wistar rats. Animals were injected twice a day with 1.6 µmol/g body weight cystine dimethyl ester and/or 0.26 µmol/g body weight cysteamine from the 16th to the 20th postpartum day and euthanized after 12 hours. Pyruvate kinase, adenylate kinase, creatine kinase activities and thiol/disulfide ratio were determined...
December 7, 2017: Anais da Academia Brasileira de Ciências
Bianca S Rangel, Natascha Wosnick, Alberto F Amorim, José Roberto K, Rose E G Rici
The electrosensory system on elasmobranchs consists of subcutaneous electroreceptor organs known as ampullae of Lorenzini. The present study investigated the ampullae of Lorenzini morphology of the lesser guitarfish Zapteryx brevirostris, using light microscopy and scanning electron microscopy. The pore number found in the ventral skin surface is much higher than that found in the dorsal portion, characteristic of species that inhabit the euphotic zone. Under light microscopy it was possible to observe that the wall canal consists of a single layer of squamous epithelial cells...
December 7, 2017: Anais da Academia Brasileira de Ciências
Ana Lúcia B Zeni, Tatianne D Moreira, Ana Paula Dalmagro, Anderson Camargo, Larissa A Bini, Edésio L Simionatto, Dilamara R Scharf
Morus nigra L. (Moraceae) is a tree known as black mulberry and the leaves are used in folk medicine in the treatment of diabetes, high cholesterol and menopause symptoms. The aim of this study was to evaluate the M. nigra leaves phytochemical profile in different extractions and the hypolipidemic effect of the infusion comparing to the fenofibrate. Morus nigra infusion (MN) showed higher amounts of phenolics and flavonoids (83.85 mg/g and 79.96 µg/g, respectively), as well as antioxidant activity (83.85%) than decoction or hydromethanolic extracts...
December 7, 2017: Anais da Academia Brasileira de Ciências
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