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| Registros recuperados: 2.719 | |
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| DÍAZ,FLORENTINA; MANGUDO,CAROLINA; GLEISER,RAQUEL M.; RONDEROS,MARÍA M.. |
| Abstract: The fourth instar larva and pupa of Dasyhelea flavifrons Guérin-Méneville are redescribed, illustrated, and photomicrographed using binocular, phase-contrast, and scanning electron microscopy. Comparisons with the American species of the grisea group were made. The immatures were collected by using a siphon bottle in tree-holes and from water collected in dead snail shells in Salta Province, Argentina, transported to the laboratory and there bred to the emergence of the adults. Details on larval habitats are given. These are the first records from Argentina and in gastrotelmata. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ceratopogonidae; Dasyhelea flavifrons; Gastrotelmata; Immatures; Tree holes. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100623 |
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| DRESCH,DAIANE M.; MASETTO,TATHIANA E.; SCALON,SILVANA P.Q.. |
| The aim of this study was to evaluate the sensitivity of Campomanesia adamantium seeds to desiccation by drying in activated silica gel (fast) and under laboratory conditions (slow). To assess the sensitivity of the seeds to desiccation, we used drying with silica gel and drying under laboratory conditions (25 °C), in order to obtain seeds with moisture content of 45, 35, 30, 25, 20, 15, 10 and 5%. The physiological potential of the seeds after desiccation was evaluated by measuring primary root protrusion, percentage of normal seedlings, germination seed index, seedling length, total seedling dry mass, electrical conductivity and DNA and RNA integrities. The C. adamantium seeds were sensitive to desiccation and to a reduction in moisture content to 21.1%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; DNA; Drying; RNA; Viability. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502217 |
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| SIRAKANYAN,SAMVEL N.; GERONIKAKI,ATHINA; SPINELLI,DOMENICO; HAKOBYAN,ELMIRA K.; KARTSEV,VIKTOR G.; PETROU,ANTHI; HOVAKIMYAN,ANUSH A.. |
| ABSTRACT Annulated thienopyrimidine derivatives attracted big interest of the scientific community due to their broad spectrum of biological activities among which are the inhibition of phosphodiesterase, antiproliferative and antimicrobial activities. As a continuation of our studies on the synthesis and biological activity of fused thieno[3,2-d]pyrimidine derivatives, the goal of this paper is the synthesis and study of the properties of compounds containing different heterocycles such as fused thieno[2,3-b]pyridine and tetrazolo[1,5-c]pyrimidine in the same molecule. Thus, starting from the ethyl 1-amino-5-isopropyl-8,8-dimethyl-8,9-dihydro-6H-pyrano[4,3-d]thieno[2,3-b]pyridine-2-carboxylate 1, efficient methods for obtaining new... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino derivatives; Antimicrobial activity; Azide/tetrazole equilibrium; Nucleophilic substitution; Thieno[3; 2-d]pyrimidine. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000301043 |
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| DURAN,FERNANDO; BORETTO,JORGELINA M.; FERNÁNDEZ,JIMENA B.; MOLINA,MORA IBÁÑEZ; MEDINA,MARLIN S.; IBARGÜENGOYTÍA,NORA R.. |
| Abstract: The immune state is an essential component of survival as it directly influences physiological performance and health status. Variation in the leukocyte profile, a significantly increase in body temperature, and a detriment of the eco-physiological performance are among the possible consequences of an unhealthy state. In this study we analyse and discuss how field body temperature, preferred body temperature, the speed for sprint and long runs, locomotor stamina, and body condition can be affected by the immunological state (i.e. leukocyte profile) in a wild population of Liolaemus sarmentoi. Juveniles and adult males with a high percentage of eosinophils, basophils, and a low percentage of monocytes preferred higher body temperatures in a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body condition; Leukocyte profile; Liolaemus sarmientoi; Locomotor performance; Thermoregulation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700608 |
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| SANTOS,LILIAN D. DOS; ZADINELO,IZABEL V.; SILVA,LILIAN C.R. DA; ZILLI,ROGÉRIO L.; BARREIROS,MARCO ANTONIO B.; MAUERWERK,MARLISE T.; MEURER,FÁBIO. |
| Abstract: The aim of this study was to evaluate the production performance of Nile tilapia post-larvae and fingerlings fed with increasing levels of alcoholic extract of propolis into diets. In Experiment 1, 1800 post-larvae were distributed in 30 tanks, in a completely randomized design with five treatments composed by the inclusion of 0, 1, 2, 3 and 4 g of dry propolis/kg of feed, and six replicates. In experiment 2, 1600 fingerlings were distributed in the same system and designed as experiment 1. No significant effect was observed between treatments, for final weight, total and standard length, survival, and intestinal villus height. However, the propolis extract inclusion of 1 g/kg in Nile tilapia post-larvae and fingerlings’ feed resulted in a better... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Growth promoters; Natural compound; Oreochromis niloticus; Sex reversal effectiveness. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300853 |
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| MARINHO,KETSIA S.N.; ANTONIO,ERIVALDO A.; SILVA,CAMILLA V.N.S.; SILVA,KEILA T. DA; TEIXEIRA,VALÉRIA W.; AGUIAR JUNIOR,FRANCISCO C.A. DE; SANTOS,KATHARINE R.P. DOS; SILVA,NICÁCIO H. DA; SANTOS,NOEMIA P.S.. |
| ABSTRACT This study aimed to evaluate the teratogenic and hepatotoxic potential of the usnic acid encapsulated into PLGA-microspheres. In total, 12 female Wistar rats in pregnancy were randomly distributed in the control group (n= 6) that received 1.0 mL of physiological solution and treatment group (n= 6) that received 25 mg/kg of encapsulated usnic acid by oral administration. All females were euthanized at day 20 of pregnancy and their fetuses were removed and analyzed. During the pregnancy was observed a reduction in weight gain. There was no difference in serum transaminases levels analyzed as well as any difference in liver weight in both groups. The histomorphometric analysis of the liver from the treatment group revealed an increase in number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Encapsulation; Fetotoxicity; Hepatotoxicity; Secondary metabolite. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301073 |
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| GILES,JOÃO ANTONIO D.; OLIOSI,GLEISON; RODRIGUES,WEVERTON P.; BRAUN,HEDER; RIBEIRO-BARROS,ANA I.; PARTELLI,FÁBIO L.. |
| Abstract The morphoagronomic characterization of 12 genotypes of M. esculenta was performed during the 2013/2014 and 2014/2015 crop years. The 12 genotypes were planted in a randomized block design, with four replicates per genotype. Number of tuberous roots per plant, weight of tuberous roots, root yield, total plant weight, harvest index, plant height, height of first branch, number of shoots, stem diameter, number of buds, leaf dry weight and petiole length were evaluated. Genotypes “Camuquem” and “Goiás” were the most productive, and “Amarela” and “Gema de Ovo” were the most divergent. Seventy percent of genetic diversity was due to petiole length (22.86%), root yield (19.20%), weight of tuberous roots (14.89%) and number of buds (13.72%). Overall, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cassava; Plant breeding; Dissimilarity; Multivariate analysis. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703639 |
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| Alcântara,Berenice K. de; Pizzaia,Daniel; Piotto,Fernando A.; Borgo,Lucélia; Brondani,Gilvano E.; Azevedo,Ricardo A.. |
| Lipid peroxidation and root elongation of Eucalyptus grandis × Eucalyptus camaldulensis were studied under stress conditions in response to aluminum (Al), a metal known to limit agricultural productivity in acidic soils primarily due to reduced root elongation. In Brazil, the Grancam 1277 hybrid (E. grandis × E. camaldulensis) has been planted in the "Cerrado", a region of the country with a wide occurrence of acidic soils. The present study demonstrated that the hybrid exhibited root growth reduction and increased levels of lipid peroxidation after 24h of treatment with 100 µM of Al, which was followed by a reduction in lipid peroxidation levels and the recovery of root elongation after 48h of Al exposure, suggesting a rapid response to the early... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aluminum; Eucalypt; Lipid peroxidation; Oxidative stress; Root growth. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000201063 |
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| GALÁN-DE-MERA,ANTONIO; SÁNCHEZ-VEGA,ISIDORO; LINARES-PEREA,ELIANA; CAMPOS,JOSÉ; MONTOYA,JUAN; VICENTE-ORELLANA,JOSÉ A.. |
| ABSTRACT A phytosociological approach to dry forest and cactus communities on the occidental slopes of the Peruvian Andes is presented in base of 164 plots carried out following the Braun-Blanquet method. From them, 52 have been made recently, and the other 112 were taken from the literature. After a multivariate analysis, using a hierarchical clustering and a detendred correspondence analysis, the Acacio-Prosopidetea class (dry forest and cactus communities, developed on soils with some edaphic humidity or precipitations derived from El Niño Current), the Opuntietea sphaericae class (cactus communities of central and southern Peru, on few stabilized rocky or sandy soils) and the Carico-Caesalpinietea class (dry forests of the Peruvian coastal desert,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acacio-Prosopidetea; Cactus communities; Dry forests; Opuntietea sphaericae; Peru; Phytosociology.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200689 |
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| RIBEIRO,ANA F.; SANTOS,JULIANA F.; MATTOS,RÔMULO R.; BARROS,ELIANE G.O.; NASCIUTTI,LUIZ EURICO; CABRAL,LÚCIO M.; SOUSA,VALERIA P. DE. |
| Abstract Uncaria tomentosa (UT) extracts have been shown to have promising anti-tumor activity. We hypothesized that its incorporation into nanostructured systems could improve the anticancer properties. Here, poly-e-caprolactone (PCL) and poly-d,l-lactide-co-glycolide (PLGA) were employed to generate nanoparticles loaded with UT extract in a single emulsion solvent evaporation method. The nanoparticles were characterized by particle size, zeta potential, morphology and entrapment efficiency along with stability and release profiles. The nanoparticles presented entrapment efficiencies above 60% and a mean diameter below 300nm. UT-PCL nanoparticles presented higher entrapment efficiency and mean particle size as well as a slow release rate. The UT-PLGA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanoparticles; Prostate cancer; PLGA; PCL; Anti-tumor; Anti-cancer; Cat’s Claw. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100908 |
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| GARCIA,LETÍCIA C.; BARROS,FERNANDA V.; LEMOS-FILHO,JOSÉ P.. |
| ABSTRACT 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. The majority of the fifteen studied species had a semi-deciduous behavior and shed their leaves mainly during the dry season, with a recovery at the end of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Canga; Day length; Drought stress; Evergreen; Leaf shedding; Tropical ecosystems. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100131 |
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| FINISIE,MELLATIE R.; JOSUÉ,ATCHE; FÁVERE,VALFREDO T.; LARANJEIRA,MAURO C. M.. |
| Bioceramic composites were obtained from chitosan and hydroxyapatite pastes synthesized at physiological temperature according to two different syntheses approaches. Usual analytical techniques (X-ray diffraction analysis, Fourier transformed infrared spectroscopy, Thermo gravimetric analysis, Scanning electron microscopy, X-ray dispersive energy analysis and Porosimetry) were employed to characterize the resulting material. The aim of this investigation was to study the bioceramic properties of the pastes with non-decaying behavior from chitosan-hydroxyapatite composites. Chitosan, which also forms a water-insoluble gel in the presence of calcium ions, and has been reported to have pharmacologically beneficial effects on osteoconductivity, was added to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioceramic; Chitosan; Hydroxyapatite; Composites; Bone regeneration. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000400006 |
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| Oliveira,Paula A.; Colaço,Aura; Chaves,Raquel; Guedes-Pinto,Henrique; De-La-Cruz P.,Luis F.; Lopes,Carlos. |
| The use of chemical compounds benefits society in a number of ways. Pesticides, for instance, enable foodstuffs to be produced in sufficient quantities to satisfy the needs of millions of people, a condition that has led to an increase in levels of life expectancy. Yet, at times, these benefits are offset by certain disadvantages, notably the toxic side effects of the chemical compounds used. Exposure to these compounds can have varying effects, ranging from instant death to a gradual process of chemical carcinogenesis. There are three stages involved in chemical carcinogenesis. These are defined as initiation, promotion and progression. Each of these stages is characterised by morphological and biochemical modifications and result from genetic and/or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cancer stages; Carcinogenesis evaluation; Chemical carcinogens; Chemical carcinogenesis. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000400004 |
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| Registros recuperados: 2.719 | |
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