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Search Results: 1 - 10 of 332762 matches for " André V.L.; "
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A new species of Moneuptychia Forster (Lepidoptera: Satyrinae, Euptychiina) from the highlands of Southeastern Brazil
Freitas, André V.L.;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000600014
Abstract: this paper describes a new species of moneuptychia forster from the summits of the mantiqueira and espinha?o mountain ranges in southeastern brazil, details the morphology of adults and immatures of this species, and discusses the definition of the genus moneuptychia.
Immature stages of Adelpha malea goyama Schaus (Lepidoptera: Nymphalidae, Limenitidinae)
Freitas, André V.L.;
Neotropical Entomology , 2006, DOI: 10.1590/S1519-566X2006000500008
Abstract: the immature stages of adelpha malea goyama schaus are described from the esta??o ecológica do caiuá, paraná state, brazil. the species uses the native liana arrabidaea mutabilis bur. & k. schum. (bignoniaceae) as larval hostplant in the study site. isolated eggs are laid on leaf tips, and are similar in shape to those described for other species of adelpha hübner. larvae pass through five stadia during 21 days, and first to third instars construct frass chains. later instars rest on the upper leaf surface, and their body is covered by rigid branched scoli. the general profile of the pupa is elongated, with short head horns projecting laterally and with segment a2 projecting and curved anteriorly. comparisons with closely related species of adelpha are not conclusive, and more species in the genus need to be reared before a clear pattern of the variation in immature morphology becomes evident.
Immature stages of the butterfly Magneuptychia libye (L.) (Lepidoptera: Nymphalidae, Satyrinae)
Kaminski, Lucas A.;Freitas, André V.L.;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000200010
Abstract: the immature stages of the butterfly magneuptychia libye (l.) are described, and their morphology is compared with other neotropical satyrinae.
Distribui??o de K, eU e eTh e avalia??o da dose anual de radia??o na regi?o do Granito Serra do Carambeí - PR
Godoy, Luiz C.;Bittencourt, André V.L.;Santos, Leonardo J.C.;Ferreira, Francisco J.F.;
Revista Brasileira de Geofísica , 2011, DOI: 10.1590/S0102-261X2011000200011
Abstract: this study was conducted in an area of 14 km in length oriented in the nne direction by 7.3 km wide, covering the totality of the serra do carambeígranite and adjacent units. located in the northern region of the alagados dam, paraná state, this granite contains relatively high concentrations of k, eu and eth, known since the 1970s through airborne and terrestrial gamma-ray spectrometry surveys. recent radiochemical tests conducted on 61 samples of geological materials such as rocks (17 samples) and material of the weathering mantle and alluvial deposits (44 samples), confirmed the occurrence of radioactive anomalies in this granite, especially in thorium and uranium. the contents of k, eu and eth obtained in gamma-ray spectrometry survey and radiochemical tests, converted to annual radiation dose (ard), allowed to evaluate the intensity of natural radiation, whose levels relatively high in certain regions of the study area, can offer hazard to the local populations. the analysis and interpretation of data, as well the preparation of contour maps of k, eu and eth were fundamental to understand the behavior and mobility of radionuclides in different environmental compartments of the area.
En respuesta al artículo "Ketamina en el dolor del miembro fantasma" In response to the article "Ketamine in phantom limb pain"
V.L. Villanueva Pérez,J.M. Asensio Samper,G. Fabregat Cid,J. de Andrés Ibá?ez
Revista de la Sociedad Espa?ola del Dolor , 2010,
Abstract:
EVALUATION OF NEPHROPROTECTIVE AND ANTIOXIDANT ACTIVITY OF ANTHOXANTHUM ODORATUM ON ACETAMINOPHEN INDUCED TOXICITY IN RAT
V.L.Dheeraj
International Journal of Pharmaceutical Research and Development , 2010,
Abstract: Acetaminophen (APAP) is a commonly used analgesic and antipyretic agent which, in high doses, causes liver and kidney necrosis in man and animals. Herbal medicines have recently attracted much attention as alternative medicines for treating or preventing life style related disorders of nephrotoxicity but relatively very little knowledge is available about their mode of action. Anthoxanthum odoratum Linn (Sweet Vernal Grass), family “Poaceae” is especially provocative to hay fever and hay asthma, a medicinal tincture from it is sniffed well into the nose and throat for immediate relief from congestion. It has been reported to be biologically active for growth inhibitor and effective for nephrotoxic activity.The aim of the present study was to investigate the nephrotoxic and antioxidant activities of the ethanol extract of Anthoxanthum odoratum at two doses level of 250mg/kg & 500 mg/kg B/W on acetaminophen- induced toxicity in rats. Biochemical studies shows that increased the levels of body weight, serum urea, hemoglobin (Hb), total leucocyte count (TLC), creatinine (CR), packed cell volume (PCV), differential leucocyte count (DLC) and mean corpuscular volume (MCV) along with reduction in the levels of neutrophil, mean corpuscular hemoglobin concentration (MCHC), mean corpuscular hemoglobin (MCH), granulocytes, uric acid, platelet concentration (PLC) in acetaminophen- induced groups. These values are retrieved significantly with treatment of Anthoxanthum odoratum extract at two different doses. The antioxidant study reveals that the levels of renal superoxide dismutase (SOD), catalase (CAT), reduced glutathione (GSH) and glutathione peroxidase (GPx) in the APAP treated animals are increased significantly along with decreased malonodialdehyde (MDA) content in ethanol extract of Anthoxanthum odoratum treated groups. In conclusion, these data suggest that the ethanol extract of Anthoxanthum odoratum can prevent renal damage from APAP-induced nephro toxicity in rats and this is likely mediated through its antioxidant activities.
Glyphosate: influência na bioatividade do solo e a??o de minhocas sobre sua dissipa??o em terra agrícola
Andréa, M.M.;Papini, S.;Peres, T.B.;Bazarin, S.;Savoy, V.L.T.;Matallo, M.B.;
Planta Daninha , 2004, DOI: 10.1590/S0100-83582004000100012
Abstract: the widespread usage of pesticides leads to the need of improving the knowledge on their environmental behaviour in order to decrease the risks to biota, as well as the water, soil, and food contamination. the influence of the earthworms eisenia foetida on the dissipation of glyphosate, the herbicide bioaccumulation in the worms and the influence of the herbicide on the endogeneous microbial bioactivity were evaluated in an agricultural soil sample treated with aqueous solution of 14c-glyphosate. the studies were performed in systems maintained for 2 or 4 months containing soil samples treated with three different concentrations of 14c-glyphosate and containing or not the earthworms. after these periods, soil samples and the earthworms were extracted and combusted for radiocarbon quantification by liquid scintillation counting (ecl). the microbial bioactivity was evaluated through the activity of the dehydrogenase enzyme. results showed that earthworms did not influence the soil dissipation of glyphosate, independently of the contact period, although they bioaccumulated glyphosate residues, proportionally to the contact period. the higher period favoured the 14c-non-extractable or bound residues production. soil bioactivity was not altered, neither by the earthworms, nor by the treatments or time after treatments.
Automatic marker determination algorithm for watershed segmentation using clustering
Gonzalez,M. A.; Ballarin,V.L.;
Latin American applied research , 2009,
Abstract: biomedical image processing is a difficult task because of the presence of noise, textured regions, low contrast and high spatial resolution. the objects to be segmented show a great variability in shape, size and intensity whose inaccurate segmentation conditions the ulterior quantification and parameter measurement. the partition of an image in regions that allow the experienced observant to obtain the necessary information can be done using a mathematical morphology tool called the watershed transform (wt). this transform is able to distinguish extremely complex objects and is easily adaptable to various kinds of images. the success of the wt depends essentially on the existence of unequivocal markers for each of the objects of interest. the standard methods of marker detection are highly specific, they have a high computational cost and they determine markers in an effective but not automatic way when processing highly textured images. this paper proposes the use of clustering techniques for the automatic detection of markers that allows the application of the wt to biomedical images. the results allow us to conclude that the method proposed is an effective tool for the application of the wt.
Automatic marker determination algorithm for watershed segmentation using clustering
M. A. Gonzalez,V.L. Ballarin
Latin American applied research , 2009,
Abstract: Biomedical image processing is a difficult task because of the presence of noise, textured regions, low contrast and high spatial resolution. The objects to be segmented show a great variability in shape, size and intensity whose inaccurate segmentation conditions the ulterior quantification and parameter measurement. The partition of an image in regions that allow the experienced observant to obtain the necessary information can be done using a Mathematical Morphology tool called the Watershed Transform (WT). This transform is able to distinguish extremely complex objects and is easily adaptable to various kinds of images. The success of the WT depends essentially on the existence of unequivocal markers for each of the objects of interest. The standard methods of marker detection are highly specific, they have a high computational cost and they determine markers in an effective but not automatic way when processing highly textured images. This paper proposes the use of clustering techniques for the automatic detection of markers that allows the application of the WT to biomedical images. The results allow us to conclude that the method proposed is an effective tool for the application of the WT.
当前物理学的特别重要而有趣的问题
v.l.ginzburg,朱建国
物理 , 1991,
Abstract: ?许多人可能注意到了不少年青的物理学工作者,甚至是极有天才的那些人,经常只有相当狭窄的知识面.他们对某些复杂的领域(如量子场论)了如指掌,甚至连精微细节也十分熟悉.但是,如果你问他们超导电性或铁电性的本质是什么,问他们中子星的结构或探测引力彼的可能途径,那么你多半是得不到回答的.其实,了解上述领域或其他领域并不需要人们花费多少时间.如果要做出很好的工作的话,具备宽广的知识面对物理学家来说不仅是?...
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