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Search Results: 1 - 10 of 127281 matches for " PAULO ESTEV?O; "
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Low-cost microprocessed instrument for evaluating soil temperature profile
CRUVINEL, PAULO ESTEVO;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000001100020
Abstract: this paper describes a low-cost microprocessed instrument for in situ evaluating soil temperature profile ranging from -20.0°c to 99.9°c, and recording soil temperature data at eight depths from 2 to 128 cm. of great importance in agriculture, soil temperature affects plant growth directly, and nutrient uptake as well as indirectly in soil water and gas flow, soil structure and nutrient availability. the developed instrument has potential applications in the soil science, when temperature monitoring is required. results show that the instrument with its individual sensors guarantees ±0.25°c accuracy and 0.1°c resolution, making possible localized management changes within decision support systems. the instrument, based on complementary metal oxide semiconductor devices as well as thermocouples, operates in either automatic or non-automatic mode.
Low-cost microprocessed instrument for evaluating soil temperature profile
CRUVINEL PAULO ESTEVO
Pesquisa Agropecuária Brasileira , 2000,
Abstract: This paper describes a low-cost microprocessed instrument for in situ evaluating soil temperature profile ranging from -20.0°C to 99.9°C, and recording soil temperature data at eight depths from 2 to 128 cm. Of great importance in agriculture, soil temperature affects plant growth directly, and nutrient uptake as well as indirectly in soil water and gas flow, soil structure and nutrient availability. The developed instrument has potential applications in the soil science, when temperature monitoring is required. Results show that the instrument with its individual sensors guarantees ±0.25°C accuracy and 0.1°C resolution, making possible localized management changes within decision support systems. The instrument, based on complementary metal oxide semiconductor devices as well as thermocouples, operates in either automatic or non-automatic mode.
In silico analysis of Eucalyptus thioredoxins
Barbosa, Aulus Estevo;Marinho, Paulo;
Genetics and Molecular Biology , 2005, DOI: 10.1590/S1415-47572005000400008
Abstract: the eucalyptus genome sequencing project (forests), an initiative from the brazilian onsa consortium (organization for nucleotide sequencing and analysis), has achieved the sequencing of 123.889 est clones from 18 different cdna libraries. we have investigated the forests data set to identify est clusters potentially encoding thioredoxins (trx). two types of thioredoxin families described in plants, chloroplastic (trxm/f/x/y) and cytosolic (trxh), have been found in the transcriptome. putative typical trxs have been identified in fifteen clusters, four m-type, seven h-type, two f-type, one cluster for each x/y-types and one putative homologue of the tdx gene from arabidopsis thaliana. one cluster presents an atypical active site wcmps, different from the conserved wcgpc present in the other 15 clusters, and corresponds to a subgroup of cytosolic thioredoxins. except in specific libraries from callus, roots, seedlings and wood tissues, thioredoxin deduced ests are found in all remaining libraries. according to the calculated frequencies of ests, chloroplastic thioredoxins are preferentially present in green tissues such as leaves whilst cytoplasmic thioredoxins are more general but demonstrate elevated frequencies in seedlings and flower tissues. trx frequency patterns in the eucalyptus transcriptome seem to indicate a good coherence with data from arabidopsis thaliana gene expression.
Intelligent instrument to facilitate decision making in the evaluation of soil resistance to root penetration
Rabello, Ladislau Marcelino;Cruvinel, Paulo Estevo;
Scientia Agricola , 2009, DOI: 10.1590/S0103-90162009000500001
Abstract: this contribution introduces an instrument for decision-making in agricultural processes based on the measurements and mapping of soil resistance to root penetration. its development was based on a new and advanced instrumentation tool, enabling in almost real-time to acquire the necessary information for spatial variability analysis of plant root penetration resistance in soils, due to natural or artificial soil compaction processes, i.e., not only for an area of soil but also for a soil profile. the system allows soil resistance assays for both laboratory and agricultural fields. moreover, the development focused on an intelligent instrumentation concept, as well as a microprobe (30o for the spire angle, 1,6 mm for the base diameter, and 30 mm of total length), with a strain-gage transducer sensor. results have shown that measurements of soil resistance to plant root penetration can be performed up to the limit of (483.47 ± 0.69) n, with a resolution of 15.4 n. additionally, the versatility of the system is verified for soil resistance data collection and its interpretation to root plant penetration, since they can be presented in table formats, one-dimensional graphs, two-dimensional and three-dimensional maps. therefore, this system enables users to obtain a quick interpretation of the soil aggregation state in agricultural areas.
Efeito de fungicidas no controle in vitro de Colletotrichum gloeosporioides, agente etiológico da antracnose do mamoeiro (Carica papaya l.)
Tavares, Giltembergue Macedo;Souza, Paulo Estevo de;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000100006
Abstract: the efficiency of fungicides on colletotrichum gloeosporioides was evaluated in vitro in the laboratory of epidemiology and diseases management of the department of phytopathology /ufla. the fungicides were applied either in bda medium or in glass slide chambers, the latter to assess the effects on conidial germination. the fungicides tested were: azoxystrobin, chlorothalonil, sodium hypochloride, imazalil, copper oxychloride, prochloraz, propiconazol, tebuconazol, thiabendazol and thiophanate-methyl in the concentrations of 0, 1, 10, 100, 500 and 1.000 ppm to evaluate the inhibition of the mycelial growth and in the concentrations of 0, 1, 10, 50 and 100 ppm to test inhibition of the conidial germination. the fungicides azoxystrobin, chlorotalonil, imazalil, prochloraz, propiconazol and tebuconazol presented high efficiency in the inhibition of the mycelial growth. the fungicides of the benzimidazol group (thiabendazol and thiophanate-methyl) showed low efficiency in the control of c. gloeosporioides. sodium hypochloride showed low efficiency in the control of the mycelial growth of the fungus. for inhibition of the conidial germination, the fungicides oxychloride, chlorothalonil and sodium hypochloride showed high efficiency, even at low concentrations. c. gloeosporioides showed to be tolerant to the fungicides thiabendazole and thiophanate-methyl, as conidial germination and mycelial growth were not affected in the presence of these products.
Cancer do es?fago: complica??es pós-operatórias imediatas e letalidade hospitalar
Gagliardi, Danilo;Corsi, Paulo Roberto;Frimm, Carlos Estevo;Fava, Jo?o;
Revista do Colégio Brasileiro de Cirurgi?es , 2004, DOI: 10.1590/S0100-69912004000100002
Abstract: objective: the analysis of the variables that can influence on the immediate postoperative complications and hospital mortality of patients with esophageal cancer submitted to surgery. methods: in a retrospective analysis of data from 60 patients, variables such as provenience, disease history, previous diseases, smoking, alcohol drinking, disease stage, and the nature of the surgery were studied in order to check if they could have played a role on complications and death. results: the resulting variables: pleuropulmonary complications, sepsis, dehiscence of cervical anastomosis, mediastinitis, and death have been more significantly correlated to the following explanatory variables, respectively: palliative surgery, mediastinitis, tumor located in the superior thoracic segment, and sepsis. by means of univaried analysis, the explanatory variables have showed no significant correlation with dehiscence of thoracic anastomosis. palliative surgery and respiratory insufficiency were the explanatory variables more significantly associated to the resulting variable pleuropulmonary complications. the interdependence of these variables has allowed to state that pleuropulmonary complications were 13.8 times more frequent in the patients with esophageal cancer submitted to palliative surgery developing respiratory insufficiency. conclusion: palliative surgery and tumor located in the superior segment have correlated to pleuropulmonary complications. there was no correlation at all between the variables here studied and dehiscence of intrathoracic anastomosis.
Detection of beetle damage in forests by X-ray CT image processing
Cruvinel, Paulo Estevo;Naime, Jo?o de Mendon?a;Borges, Miguel;Macedo, álvaro;Zhang, Aijun;
Revista árvore , 2003, DOI: 10.1590/S0100-67622003000500017
Abstract: some beetle species can have devastating economic impacts on forest and nursery industries. a recent example is anophophora glabripennis, a species of beetle known in the united states as the ''asian longhorrned beetle'', which has damaged many american forests, and is a threat which can unintentionally reach south american countries, including brazil. this work presents a new method based on x-ray computerized tomography (ct) and image processing for beetle injury detection in forests. its results show a set of images with correct identification of the location of beetles in living trees as well as damage evaluation with time.
Detection of beetle damage in forests by X-ray CT image processing
Cruvinel Paulo Estevo,Naime Jo?o de Mendon?a,Borges Miguel,Macedo álvaro
Revista árvore , 2003,
Abstract: Some beetle species can have devastating economic impacts on forest and nursery industries. A recent example is Anophophora glabripennis, a species of beetle known in the United States as the ''Asian Longhorrned beetle'', which has damaged many American forests, and is a threat which can unintentionally reach south American countries, including Brazil. This work presents a new method based on X-ray computerized tomography (CT) and image processing for beetle injury detection in forests. Its results show a set of images with correct identification of the location of beetles in living trees as well as damage evaluation with time.
Platelet-derived exosomes from septic shock patients induce myocardial dysfunction
Luciano Azevedo, Mariano Janiszewski, Vera Pontieri, Marcelo Pedro, Estevo Bassi, Paulo Tucci, Francisco Laurindo
Critical Care , 2007, DOI: 10.1186/cc6176
Abstract: We collected blood samples from 55 patients with septic shock and 12 healthy volunteers for exosome separation. Exosomes from septic patients and healthy individuals were investigated concerning their myocardial depressant effect in isolated heart and papillary muscle preparations.Exosomes from the plasma of septic patients significantly decreased positive and negative derivatives of left ventricular pressure in isolated rabbit hearts or developed tension and its first positive derivative in papillary muscles. Exosomes from healthy individuals decreased these variables non-significantly. In hearts from rabbits previously exposed to endotoxin, septic exosomes decreased positive and negative derivatives of ventricular pressure. This negative inotropic effect was fully reversible upon withdrawal of exosomes. Nitric oxide (NO) production from exosomes derived from septic shock patients was demonstrated by fluorescence. Also, there was an increase in myocardial nitrate content after exposure to septic exosomes.Circulating platelet-derived exosomes from septic patients induced myocardial dysfunction in isolated heart and papillary muscle preparations, a phenomenon enhanced by previous in vivo exposure to lipopolysaccharide. The generation of NO by septic exosomes and the increased myocardial nitrate content after incubation with exosomes from septic patients suggest an NO-dependent mechanism that may contribute to myocardial dysfunction of sepsis.Septic shock remains one of the most challenging medical conditions, with increasing incidence over the last years. The tendency of such an increase is probably due to progressive aging of the population, improvements in critical care support, and progress in chemotherapy and immunosuppressive therapies, with increased life expectancy of immunosupressed patients and patients with malignancies. Although much has been learned about the pathophysiology of sepsis in the last decade, the mortality of this condition is still elevated.O
Discursos sobre comportamento de risco à saúde e a moraliza??o da vida cotidiana
Bagrichevsky,Marcos; Castiel,Luis David; Vasconcellos-Silva,Paulo Roberto; Estevo,Adriana;
Ciência & Saúde Coletiva , 2010, DOI: 10.1590/S1413-81232010000700081
Abstract: the text analyses critically the polarity between discourses about healthy life styles and the sedentariness in the context of new technologies for health information research and dissemination. we argue that the techno-scientific rationality has grown an 'economy of trues' which, on the perspective of conducting to safe life styles, has prescribed a normative ideal of self discipline which tends to generate distress and consumerism of artifacts of burning calories. in the hegemonic production of systems of truth, sedentariness has been seen as a kind of unhealthy behavior that is ranked as moral failure. emphasis is given about the multiple discourses embracing life styles and risk, taken as biopolitics devices imbricated in the communication processes in health, which has to be lightened up for their ethics and politics implications. the spectacularization of life styles associated to the consumption and the production of narratives that have badly influenced our culture, making bigger the distance of a socially possible notion of health. we discussed the regulatory essence of such a symbolic reference in the construction of knowledge systems that have been (re)defined what is to be healthy, normal and unhealthy.
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