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Anais da Academia Brasileira de Ciências

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https://www.readbyqxmd.com/read/28273247/richness-and-density-of-aquatic-benthic-macroinvertebrates-after-exposure-to-fungicides-and-insecticides-in-rice-paddy-fields
#1
Alana C D Wandscheer, Enio Marchesan, Sandro Santos, Renato Zanella, Marília F Silva, Guilherme P Londero, Gabriel Donato
The objective of this study was to verify the richness and density of aquatic benthic macroinvertebrates after exposure to fungicides and insecticides of the rice paddy fields. In the crop seasons of 2012/13 and 2013/14, field experiments were performed, which consisted of single-dose applications of the fungicides trifloxystrobin + tebuconazole and tricyclazole, and the insecticides lambda-cyhalothrin + thiamethoxam and diflubenzuron, in 10 m2 experimental plots, over rice plants in the R3 stage. Control plots with and without rice plants were maintained in order to simulate a natural environment...
March 2, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28273246/distributional-patterns-of-aptian-albian-paleoichthyofauna-of-brazil-and-africa-based-on-track-analysis
#2
Thaís C C Parméra, Valéria Gallo, Hilda M A DA Silva, Francisco J DE Figueiredo
The Aptian-Albian paleoichthyofauna in Brazil and Africa is quite diverse, yet their geographic patterns still require accounts. This work consists of a panbiogeographical analysis of paleoichthyofauna from Aptian-Albian through track analysis. Geographic coordinates were obtained and converted into paleocoordinates. Individual Tracks (ITs) and Generalized Tracks (GTs) were built with the aid of ArcView GIS v3.2 program using Trazos2004 extension. As a result, four GTs and tree Biogeographic Nodes (A, B and C) had been identified...
March 2, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28273245/grape-juice-increases-the-bdnf-levels-but-not-alter-the-s100b-levels-in-hippocampus-and-frontal-cortex-from-male-wistar-rats
#3
Caroline Dani, Ana Cristina Andreazza, Carlos Alberto Gonçalves, Flávio Kapizinski, João A P Henriques, Mirian Salvador
Several studies have shown that a high consumption of vegetables and fruits is consistently associated with a low risk of oxidative stress-induced diseases, which includes some degenerative diseases such as amyotrophic lateral sclerosis, Alzheimer and Parkinson. Therefore, the objective of this study is to verify the effects of conventional and organic grape juice in the modulation of the neurotrophic factor (BDNF) and astrocytic markers protein (S100B) in hippocampus and frontal cortex of Wistar rats. In this study, 24 male Wistar rats were divided into three groups...
March 2, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28273244/bone-turnover-markers-in-sheep-and-goat-a-review-of-the-scientific-literature
#4
José A Camassa, Camila C Diogo, Cristina P Sousa, Jorge T Azevedo, Carlos A Viegas, Rui L Reis, Nuno Dourado, Isabel R Dias
Bone turnover markers (BTMs) are product of bone cell activity and are generally divided in bone formation and bone resorption markers. The purpose of this review was to structure the available information on the use of BTMs in studies on small ruminants, especially for monitoring their variations related to diet, exercise, gestation and metabolic lactation state, circadian and seasonal variations, and also during skeletal growth. Pre-clinical and translational studies using BTMs with sheep and goats as animal models in orthopaedic research studies to help in the evaluation of the fracture healing process and osteoporosis research are also described in this review...
March 2, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28273243/effect-of-phosphorus-on-arsenic-uptake-and-metabolism-in-rice-cultivars-differing-in-phosphorus-use-efficiency-and-response
#5
Júlia G Farias, Katieli Bernardy, Raíssa Schwalbert, Bianca K Del Frari, Andrew Meharg, Manus Carey, Anderson C R Marques, Antonio Signes-Pastor, Darlene Sausen, Márcio R W Schorr, Mirian S Tavares, Fernando T Nicoloso
A hydroponic experiment was carried out to investigate the effect of phosphorus (P) nutrition on arsenic (As) uptake and translocation within the seedlings of rice cultivars. The experiment occurred in three stages: I 5 days of acclimatization (nutritive solution); II 10 days under P (0.0 and 0.09 mM) and As (0.0 and 100 mM) treatments; III 5 days under recovery. The As exposure had significant effect reducing dry weights of shoots or roots, resulted in elevated concentrations of As in shoot tissues. BR-IRGA 409 showed the highest susceptibility to As in biomass production and root system parameters regardless the P level...
March 2, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28225852/tryptophan-overloading-activates-brain-regions-involved-with-cognition-mood-and-anxiety
#6
Luana C A Silva, Milena B Viana, José S Andrade, Melyssa A Souza, Isabel C Céspedes, Vânia D'Almeida
Tryptophan is the only precursor of serotonin and mediates serotonergic activity in the brain. Previous studies have shown that the administration of tryptophan or tryptophan depletion significantly alters cognition, mood and anxiety. Nevertheless, the neurobiological alterations that follow these changes have not yet been fully investigated. The aim of this study was to verify the effects of a tryptophan-enriched diet on immunoreactivity to Fos-protein in the rat brain. Sixteen male Wistar rats were distributed into two groups that either received standard chow diet or a tryptophan-enriched diet for a period of thirty days...
February 16, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28225851/effect-of-bauhinia-holophylla-treatment-in-streptozotocin-induced-diabetic-rats
#7
Marcelo S Pinheiro, Luhara S Rodrigues, Leila S, Rafaianne Q Moraes-Souza, Thaigra S Soares, Madileine F Américo, Kleber E Campos, Débora C Damasceno, Gustavo T Volpato
Bauhinia holophylla, commonly known as "cow's hoof", is widely used in Brazilian folk medicine for the diabetes treatment. Therefore, the aim of this study was at evaluating the aqueous extract effect of Bauhinia holophylla leaves treatment on the streptozotocin-induced diabetic rats. Diabetes was induced by Streptozotocin (40 mg/Kg) in female Wistar rats. Oral administration of aqueous extract of Bauhinia holophylla leaves was given to non-diabetic and diabetic rats at a dose of 400 mg/kg during 21 days. On day 17 of treatment, the Oral Glucose Tolerance Test was performed to determine the area under the curve...
February 16, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28198921/premaxillary-crest-variation-within-the-wukongopteridae-reptilia-pterosauria-and-comments-on-cranial-structures-in-pterosaurs
#8
Xin Cheng, Shunxing Jiang, Xiaolin Wang, Alexander W A Kellner
Cranial crests show considerable variation within the Pterosauria, a group of flying reptiles that developed powered flight. This includes the Wukongopteridae, a clade of non-pterodactyloids, where the presence or absence of such head structures, allied with variation in the pelvic canal, have been regarded as evidence for sexual dimorphism. Here we discuss the cranial crest variation within wukongopterids and briefly report on a new specimen (IVPP V 17957). We also show that there is no significant variation in the anatomy of the pelvis of crested and crestless specimens...
February 9, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28198920/exogenous-enzyme-complex-prevents-intestinal-soybean-meal-induced-enteritis-in-mugil-liza-valenciennes-1836-juvenile
#9
Leonardo R V Ramos, Virgínia F Pedrosa, Agnes Mori, Carlos F F DE Andrade, Luis A Romano, Paulo C Abreu, Marcelo B Tesser
Four soybean meal-based diets containing increasing levels of an enzyme complex (E50, E100, E150 and E200 at 50, 100, 150 and 200 g ton-1, respectively) and one soybean meal-based diet without the enzyme complex (E0) were fed in triplicate to M. liza juveniles in a semi-static flow system with 20 fish per tank for 75 days. There were no differences between the treatments for animal performance parameters, but fish fed the enzyme complex treatment exhibited significantly (P<0.05) higher values of calcium bone retention compared with control fish...
February 9, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28198919/natural-compounds-from-mexican-medicinal-plants-as-potential-drug-leads-for-anti-tuberculosis-drugs
#10
Rocio Gómez-Cansino, Silvia Laura Guzmán-Gutiérrez, María Guadalupe Campos-Lara, Clara Ines Espitia-Pinzón, Ricardo Reyes-Chilpa
In Mexican Traditional Medicine 187 plant species are used in the treatment of respiratory conditions that may be associated with tuberculosis. In this contribution, we review the ethnobotany, chemistry and pharmacology of 63 species whose extracts have been assayed for antimycobacterial activity in vitro. Among these, the most potent is Aristolochia brevipes (MIC= 12.5 µg/mL), followed by Aristolochia taliscana, Citrus sinensis, Chrysactinia mexicana, Persea americana, and Olea europaea (MIC<64 µg/mL)...
February 9, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28198918/artificial-diet-for-laboratory-rearing-of-condylorrhiza-vestigialis-guen%C3%A3-e-1854-lep-crambidae
#11
Lucas S Campos, Aloisio Coelho, José Roberto P Parra
The Brazilian Poplar Moth, Condylorrhiza vestigialis (Guenée), compromises the wood productivity of poplar trees (Populus sp.), mainly affecting the matchstick industry in southern Brazil. Considering the lack of information on rearing techniques for this insect, the objective of this study was to develop an artificial diet to rear C. vestigialis with biological characteristics similar to the wild insects. A properly diet will enable bio-ecological studies and biological control programs using the baculovirus Condylorrhiza vestigialis multiple nucleopolyhedrovirus (CvMNPV)...
February 9, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28198917/environmental-drivers-on-leaf-phenology-of-ironstone-outcrops-species-under-seasonal-climate
#12
Letícia C Garcia, Fernanda V Barros, José P Lemos-Filho
Banded iron formations (BIF) have a particular vegetation type and provide a good model system for testing theories related to leaf phenology, due to unique stressful environmental conditions. As a consequence of the stressful conditions of BIF environment, we hypothesize that most species would retain at least some significant canopy cover, even at the end of the dry season, independently of growth form - trees, shrubs, and sub-shrubs. Considering the strong seasonality, we also hypothesize that photoperiod and rainfall act as triggers for leaf fall and leaf flushing in these environments...
February 9, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28177054/propolis-from-southwest-of-parana-produced-by-selected-bees-influence-of-seasonality-and-food-supplementation-on-antioxidant-activity-and-phenolic-profile
#13
Matheus A Calegari, Anaclara Prasniewski, Cleidiane DA Silva, Ricardo Y Sado, Fabiana M C Maia, Larissa M S Tonial, Tatiane L C Oldoni
Propolis produced by selected bees Apis mellifera were collected from March to June of 2013 and in March of 2015 and analyzed in order to evaluate the influence of climate, colony of origin, and food supplementation of colonies on the content of total phenolic and flavonoid by chromatographic analysis and antioxidant activity by radical scavenging of 2,2-diphenyl-1-picrylhydrazyl hydrate (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and ferric reducing antioxidant power (FRAP) methods...
February 6, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28177053/the-use-of-microsatellite-markers-in-neotropical-studies-of-wild-birds-a-literature-review
#14
Renan F Moura, Deborah A Dawson, Denise M Nogueira
Despite extensive habitat fragmentation, the Neotropical region possesses 30% of the world´s bird species. Microsatellites have remained one of the most popular genetic markers and have been used in ecological and conservation studies since the 1990's. We conducted a literature review comparing the number of papers published from January 1990 to July 2015 that used microsatellite markers for studies of wild birds in the Neotropical region, USA and some European countries. We assigned the articles to three categories of studies: population genetics, animal behavior/kinship analysis and the development of species-specific bird microsatellite markers...
February 6, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28177052/reassessment-and-relationships-of-%C3%A2-scutatuspinosus-itapagipensis-teleostei-clupeomorpha-%C3%A2-ellimmichthyiformes-from-the-neocomian-of-rec%C3%A3-ncavo-basin-northeastern-brazil
#15
Francisco J DE Figueiredo, Douglas R M Ribeiro
Clupeomorphs are found in many assemblages of the northeastern Brazil, whose ages range from the Neocomian to Paleogene. Ten species were described. Among them †Scutatuspinosus itapagipensis, a torpedo-like fish found in shales of the Marfim Formation from Bahia, remains poorly known. At first it was positioned within †Scutatuspinosinae and indicated as closely related to †Diplomystus. Diagnoses for the subfamily and genus were based on certain characters masking relationships. Recently it was placed in †Ellimmichthyiformes, but its systematic position remains controversial...
February 6, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28177051/dental-caries-at-lapa-do-santo-central-eastern-brazil-an-early-holocene-archaeological-site
#16
Pedro DA-Gloria, Rodrigo E Oliveira, Walter A Neves
The origin and dispersion of the first Americans have been extensively investigated from morphological and genetic perspectives, but few studies have focused on their health and lifestyle. The archaeological site of Lapa do Santo, central-eastern Brazil, has exceptionally preserved Early Holocene human skeletons, providing 19 individuals with 327 permanent and 122 deciduous teeth dated to 9,250 to 7,500 years BP. In this study, we test whether the inhabitants of Lapa do Santo had high prevalence of dental caries as previous studies of Lagoa Santa collection have indicated, using individual and tooth as units of analyses...
February 6, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991970/experimental-validation-of-a-bearing-wear-model-using-the-directional-response-of-the-rotor-bearing-system
#17
Tiago Henrique Machado, Katia L Cavalca
The present work gives continuity in the analysis of the wear influence on cylindrical hydrodynamic bearings by presenting an experimental validation of the wear model previously proposed by the authors. This validation is carried on using the frequency response of the rotor-bearings system in directional coordinates. For this purpose, a test rig was assembled in order to evaluate the behavior of the rotating system when supported by hydrodynamic bearings with different wear patterns. The experimental measurements are used to validate the wear model, comparing the anisotropy influence on the experimental and numerical responses...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991969/effects-of-irrigation-intervals-and-organic-manure-on-morphological-traits-essential-oil-content-and-yield-of-oregano-origanum-vulgare-l
#18
Farzad Gerami, Parviz R Moghaddam, Reza Ghorbani, Abbas Hassani
In order to evaluate the effect of irrigation intervals and cattle manure levels on morphological traits, essential oil content and yield of oregano, an experiment was conducted at the experimental Farm of the Faculty of Agriculture, Urmia University, Iran. The experimental design was split-plots, arranged in randomized complete blocks with three replications. Main plots including irrigation intervals (1, 2 and 3 weeks) and four levels of cattle manure at 0, 10, 20 and 30 t ha-1 were allocated to sub plots...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991968/genetic-structure-from-the-oldest-jatropha-germplasm-bank-of-brazil-and-contribution-for-the-genetic-improvement
#19
Dalilhia N Dos Santos, Juliano L Ferreira, Tesfahun A Setotaw, Geraldo M A Cançado, Moacir Pasqual, Luciana C N Londe, Heloisa M Saturnino, Wagner A Vendrame
Jatropha is a potential oilseed crop, which requires mitigating factors such as the low genetic variability of the species. The solution runs through the research of Brazilian germplasm. Attention should be given to the germplasm of jatropha the north of Minas Gerais, because this is the oldest national collection and because this region may be a regions of jatropha diversity due to selection pressure arising from environmental adversities. Therefore, the objective of this study was to investigate the genetic diversity of 48 accessions of collection from Empresa de Pesquisa Agropecuária de Minas Gerais (EPAMIG), using SSR and ISSR markers...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27991967/evaluation-of-deciduous-broadleaf-forests-mountain-using-satellite-data-using-neural-network-method-near-caspian-sea-in-north-of-iran
#20
Seyed A Hashemi
During the recent decades, deciduous forests have been molested by human intervention. Easy access, abundance and diversity of valuable forest products have led to increased population density, creating new residential areas and deforestation activities. Revealing changes is one of the fundamental methods in management and assessment of natural resources. This study is evaluated changes in forests area of 2013 using satellite images. In order to mapping the forest extent condition 2013, images of the mentioned years were digitized and geo-referenced by using the ground control points and the maps of mapping organization...
October 2016: Anais da Academia Brasileira de Ciências
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