The theorical-methodological construction of theses and dissertations and their epistemological problems.

abstract：:We used skeletochronology to compare age, size, reproductive parameters and growth patterns of two related, anuran amphibians from Northern Argentina: Leptodactylus bufonius (n=69) and L. latinasus (n=56), in order to better understand their coexistence in syntopy. Previous studies showed that the two species overlap ...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Marangoni F,Courtis A,Piñeiro JM,Ingaramo MDR,Cajade R,Stănescu F

更新日期：2019-07-29 00:00:00

abstract：:One of the most prominent fields of environmental chemistry is the study and the removal of micro-pollutants from aqueous matrices. Analytical techniques for their identification and quantification are becoming more sensitive and comprehensive and, as a result, an increasing number of drugs have been detected in envir...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Morais RL,Santiago MF,Zang JW,Fonseca-Zang WA,Schimidt F

更新日期：2018-04-01 00:00:00

abstract：:Acute intermittent porphyria is the most common acute porphyria caused by a decrease in hepatic porphobilinogen deaminase activity, resulting in an accumulation of delta-aminolevulinic acid and porphobilinogen. This disease shows nonspecific signs and symptoms that can be confused with other diseases, thereby making t...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Dos Santos AR,De Albuquerque RR,Doriqui MJ,Costa GC,Dos Santos AP

更新日期：2013-09-01 00:00:00

abstract：: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 r...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Mesquita JA,Lacerda-Santos R,Sampaio GAM,Godoy GP,Nonaka CFW,Alves PM

更新日期：2017-01-01 00:00:00

abstract：:Mangiferin, present in Mangifera indica bark, was reported to produce hypoglycemic and antidiabetic activity in an animal model of genetic type 2 diabetes and in streptozotocin diabetic rats. Its effect on diabetic insulin-resistant animals has not been investigated. The current work aimed to explore the effect of man...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Saleh S,El-Maraghy N,Reda E,Barakat W

更新日期：2014-12-01 00:00:00

abstract：:Chemical transformations of eremantholide C (1), a sesquiterpene lactone that was isolated from Lychnophora trichocarpha Spreng. led to five new derivatives: 1',2'- epoxyeremantholide C (2), 5-n-propylamine-4,5-dihydro-1',2'-epoxyeremantholide C (3), 5-n-propylammonium-4,5-dihydro-1',2'-epoxyeremantholide C chloride (...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Saúde-Guimarães DA,Raslan DS,Chiari E,De Oliveira AB

更新日期：2014-12-01 00:00:00

abstract：:Castor bean (Ricinus communis L.) is cultivated mainly for biodiesel production because of its oil-rich seeds; it is assumed to be an anemophylous species. But pollination deficit can lead to low productivity often attributed to other reasons. In this paper, we investigated pollination requirements, pollination mechan...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Rizzardo RA,Milfont MO,Silva EM,Freitas BM

更新日期：2012-12-01 00:00:00

abstract：:Intensification of aquaculture production systems exposes fish to numerous stressors, which may negatively affect their growth and limit profitability of aquaculture systems. This study determined effects of increasing levels of dietary mannanoligosaccharides on growth and intestine morphology of pacu. Fish (44.04 g) ...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Sado RY,Bicudo AJ,Cyrino JE

更新日期：2014-09-01 00:00:00

abstract：:Experiments in this paper demonstrate that mitochondrial damage associated to NAD(P)+-induced Ca2+ efflux, is the consequence of inappropriate reaction conditions. The major findings are (i) Added oxaloacetate and acetoacetate readily oxidize NAD(P)H in intact rat liver mitochondria without causing swelling or membran...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Vercesi AE

更新日期：1985-09-01 00:00:00

abstract：:A multivariable deterministic extremum seeking (ES) is being evaluated to construct an adaptive Proportional-Integral-Derivative (PID) control law for the functional Neuromuscular Electrical Stimulation (NMES) of stroke patients. The developed scheme is applied to control the position of the patient's arm so that move...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Roux-Oliveira T,Costa LR,Pino AV,Paz P

更新日期：2019-02-14 00:00:00

abstract：:We present a review on two new tools to study biophysical properties of single molecules and single cells. A laser incident through a high numerical aperture microscope objective can trap small dielectric particles near the focus. This arrangement is named optical tweezers. This technique has the advantage to permit m...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Rocha MS,Mesquita ON

更新日期：2007-03-01 00:00:00

abstract：:The centesimal composition and the physical and chemical analyses of Lentinus strigosus, an edible mushroom occurring in the Brazilian Amazon and produced in alternative substrates based on wood and agroindustrial residues, were evaluated. For this purpose, the C, N, pH, soluble solids, water activity, protein, lipids...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Sales-Campos C,Araujo LM,Minhoni MT,Andrade MC

更新日期：2013-01-01 00:00:00

abstract：:Physiological levels of reactive oxygen species (ROS) are important for intracellular and extracellular redox regulation in signaling and defense processes. Strenuous exercise can also contribute to this imbalance, and the muscle fatigue, evidenced by impaired strength or power generation, can be caused by various rea...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Goulart MJVC,Pisamiglio DS,MÖller GB,Dani C,Alves FD,Bock PM,Schneider CD

更新日期：2020-11-20 00:00:00

abstract：:We establish a method for giving lower bounds for the fundamental tone of elliptic operators in divergence form in terms of the divergence of vector fields. We then apply this method to the Lr operator associated to immersed hypersurfaces with locally bounded (r + 1)-th mean curvature Hr + 1 of the space forms Nn+ 1(c...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Bessa GP,Jorge LP,Lima BP,Montenegro JF

更新日期：2006-09-01 00:00:00

abstract：:Agromyza Fallén (Diptera, Agromyzidae) is a genus of leaf mining flies, including species with high economic importance. The knowledge of this genus is very poor in the neotropics, with 12 known species, only six of them recorded from Brazil. This paper describes two new Agromyza species from "Cerrado" and "Pantanal" ...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Sousa VR,Couri MS

更新日期：2016-01-01 00:00:00

abstract：:This study investigated the physiological effects of a pesticide based on Bacillus thuringiensis (Dipel-WP®) added in the water and diet of Piaractus mesopotamicus during 24 and 48 h. It was added 0.13 g of de B. thuringiensis per kg of commercial feed; and for the fish subjected to the biopesticide in the water of th...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Mariano WS,Azevedo SB,Gomes FL,Lima LBD,Moron SE,Tavares-Dias M

更新日期：2019-06-19 00:00:00

abstract：:The risk of developing cardiovascular disease (CVD) is related to lifestyle (e.g. diet, physical activity and smoking) as well as to genetic factors. This study aimed at evaluating the association between CVD risk factors and DNA damage levels in children and adolescents. Anthropometry, diet and serum CVD risk factors...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Kliemann M,Prá D,Müller LL,Hermes L,Horta JA,Reckziegel MB,Burgos MS,Maluf SW,Franke SI,Silva Jd

更新日期：2012-09-01 00:00:00

abstract：:The objective of this study was to evaluate the effect of controlled atmosphere (CA) on quality preservation of 'Laetitia' plums, mainly on internal breakdown, in order to determine the best CA storage conditions. Two experiments were carried out one in 2010, and another in 2011. In 2010, besides cold storage (CS; 21....

journal_title：Anais da Academia Brasileira de Ciencias

authors： Steffens CA,do Amarante CV,Alves EO,Brackmann A

更新日期：2014-03-01 00:00:00

abstract：:Plutella xylostella L. is one of the main agents to cause damages to plants of Brassica genus, provoking negative impacts in cultures. The use of botanical extracts in plants protection has been related in literature, however, their use in the species analyzed in this study is not yet reported. We assessed the effect ...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Couto IF,Fuchs ML,Pereira FF,Mauad M,Scalon SP,Dresch DM,Mussury RM

更新日期：2016-01-01 00:00:00

abstract：:The present study aimed to perform a systematic literature review to determine if there is a non-steroidal anti-inflammatory drug (NSAID) that interferes less within tooth movement. This research was performed according to the PRISMA statement. Articles were searched in eight electronic databases (PubMed, Scopus, Emba...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Corrêa AS,Almeida VL,Lopes BMV,Franco A,Matos FR,Quintans-Júnior LJ,Rode SM,Paranhos LR

更新日期：2017-10-01 00:00:00

abstract：:Environmental heterogeneity is a factor which can help explain the higher local species richness. The objective of this study was to test if richness and composition of anurans species are related to available microhabitats and landscape type of sampled sites. We assume that a higher number of microhabitats increase e...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Figueiredo GT,Storti LF,Lourenço-DE-Moraes R,Shibatta OA,Anjos LD

更新日期：2019-07-01 00:00:00

abstract：:Pterosaurs possess skeletal pneumatization, which can be assessed externally through the observation of pneumatic foramina. These foramina vary in position, shape, and number among taxa. Here we propose new characters referring to the position and number of pneumatic foramina present in cervical and dorsal vertebrae o...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Buchmann R,Rodrigues T

更新日期：2019-01-01 00:00:00

abstract：:In the present work, the ester synthesis in organic media catalyzed by lipases immobilized on chrysotile was studied. Lipases of different sources (Mucor javanicus, Pseudomonas cepacia, Rhizopus oryzae, Aspergillus niger and Candida rugosa) were immobilized on chrysotile, an inexpensive magnesium silicate, and used fo...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Silva JE,Jesus PC

更新日期：2003-06-01 00:00:00

abstract：:This study investigates the relationships between yield and evaporation as a function of lake morphology in semi-arid Brazil. First, a new methodology was proposed to classify the morphology of 40 reservoirs in the Ceará State, with storage capacities ranging from approximately 5 to 4500 hm3. Then, Monte Carlo simulat...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Campos JN,Lima IE Neto,Studart TM,Nascimento LS

更新日期：2016-05-31 00:00:00

abstract：:Byrsonima sericea leaves are extensively used in folk medicine in Brazil against gastric disorders. This study investigated the chemical constituents of B. sericea leaf ethanolic extract (BSLE) and its potential gastroprotective activity, with its possible mechanism of the action using ethanol to induce gastric mucosa...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Rodrigues PA,Morais SM,Souza CM,Magalhães DV,Vieira IG,Andrade GM,Rao VS,Santos FA

更新日期：2012-03-01 00:00:00

abstract：:In this study, geochemical and particle size analyses of thirty-four street sediment samples collected from an urban environment around Guanabara Bay, shows highway run-off to be a potential source of heavy metals for the pollution of near-shore sedimentary deposits. Concentrations of Fe, Mn, Zn, Cu, Pb, Cr and Ni wer...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Pereira E,Baptista-Neto JA,Smith BJ,McAllister JJ

更新日期：2007-12-01 00:00:00

abstract：:Fruits are rich in minerals, which are essential for a wide variety of metabolic and physiologic processes in the human body. The use of frozen fruits has greatly spread in the last years not only in the preparation of juices, but also as raw material for yogurts, candies, cookies, cakes, ice creams, and children's fo...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Spada PD,Bortolin GV,Prá D,Santos CE,Dias JF,Henriques JA,Salvador M

更新日期：2010-12-01 00:00:00

abstract：:Candida is a human fungal pathogen that causes a wide range of diseases. Candida albicans is the main etiologic agent in these diseases; however, infections can be caused by non-albicans Candida species. Virulence factors such as biofilm production, which protect the fungus from host immunity and anti-fungal drugs, ar...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Scorzoni L,Menezes RT,Pereira TC,Oliveira PS,Ribeiro FC,Santos ELS,Fugisaki LRO,Oliveira LD,Amorim JBO

更新日期：2020-12-11 00:00:00

abstract：:The tritheledontid Riograndia guaibensis was the first cynodont described for the "Caturrita Formation" fauna from the Late Triassic of southern Brazil (Santa Maria 2 Sequence). The type materials did not preserve anatomical information regarding braincase, occiput, basicranium, zygomatic arch, postdentary bones and c...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Soares MB,Schultz CL,Horn BL

更新日期：2011-03-01 00:00:00

abstract：:Seagrass beds are used by juvenile fishes in different ways, generally as nursery sites, shelter from predators, reducing competition and increasing availability of food resources, thus establishing a relationship of connectivity with other ecosystems. In the present study, the community structure of the ichthyofauna ...

journal_title：Anais da Academia Brasileira de Ciencias

authors： Pereira PH,Ferreira BP,Rezende SM

更新日期：2010-09-01 00:00:00