Arai F.K.,Federal University of Grande Dourados |
Pereira S.B.,Federal University of Viçosa |
Engenharia Agricola | Year: 2012
The quantitative knowledge of hydrological parameters (rainfall and flow) and their spatial and temporal variability on the regions or basins should be understood as essential to the efficient planning and management of water resources. Because the Ivinhema Basin, located in the state of Mato Grosso do Sul, Brazil, represents an important inductor on the region agricultural development, characterized as a major producer of grains and meat, it was used to characterize the hydrological study. Knowing the rainfall, flow and drainage area of each of the studied affluent, it was calculated the proportion of contribution of the affluent. To that end, it was proposed the concepts of potential and real contributions, aiming to identify the proportion of contribution of each of the affluent to the formation of the flow in the Ivinhema Basin. The results revealed that: the highest rainfall in the Ivinhema Basin occurred in the headwater regions; the mean specific flow of long duration reduces from the headwater to the mouth of Ivinhema Basin; the Sub-basin of Dorado's River has the highest potential and real contribution for the formation of the Ivinhema Basin flow; and the drainage areas of the affluent Dourados and Vacaria contribute with 53% flow of the basin.
Paulan S.D.C.,São Paulo State University |
Silva H.R.,São Paulo State University |
Lima E.A.C.D.F.,São Paulo State University |
Flores E.F.,São Paulo State University |
And 2 more authors.
Engenharia Agricola | Year: 2012
Visceral Leishmaniasis (VL) is caused by protozoan of genus Leishmania and transmitted by sand flies of genus Lutzomyia, which has been adapted to the peridomicile environment where dogs are their mainly food source, increasing the risk for human cases. In this study, techniques of geoprocessing and spatial statistics were utilized as a contribution to understanding the epidemiological dynamics of VL in the urban area of Ilha Solteira, SP.
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. On lettuce, soybeans, maize, beans and bidens pilosa [Efeito alelopático de extrato aquoso de folhas de Azadirachta indica A. Juss. em alface, soja, milho, feijão e picão-preto]
Rickli H.C.,Federal University of Paraná |
Fortes A.M.T.,West Parana State University |
Da Silva P.S.S.,Paulista University |
Pilatti D.M.,Biologa |
Hutt D.R.,West Parana State University
Semina:Ciencias Agrarias | Year: 2011
The family Meliaceae has been identified as one of the most promising for biological control, as most species have biologically active compounds. Among the species, the Neem (Azadirachta indica A. Juss) is that stands out most for its efficiency and low toxicity, and it is utilized to control insects, fungi and nematodes. The aim of this work was to verify the allelopathic potential of aqueous extract of fresh leaves of Neem on germination of lettuce, soybeans, maize, beans and Bidens pilosa, as a way to control this weed. The extract was obtained by grinding 200g/L of fresh leaves of the Neem (considered extract 100%) and diluting in distilled water at concentrations of 80, 60, 40, and 20%, and a control with only water. The seeds were kept in the germination chamber at a temperature of 25°C, with photoperiod of 12 hours of light. The aqueous extract affected the germination percentage and average length root of lettuce, with values of 1% and 0.1, cm respectively. For the soybeans, the extract influenced negatively the average time of germination and average speed of germination. There was a drastic reduction of the average root length at higher concentration for soybean, corn and beans. For Bidens pilosa all the parameters analyzed were negatively affected, which means sensitivity to the extract. The bioassay performed in the laboratory showed that the aqueous extract of fresh leaves of Azadirachta indica has allelopathic effect on all species. © Pleiades Publishing, Ltd., 2011.
Palharini M.C.A.,Polo Regional Centro Oeste |
Fischer I.H.,Biologa |
Alves A.R.O.F.,Polo Regional Centro Oeste |
Fileti M.S.,University of Sao Paulo
Revista Brasileira de Fruticultura | Year: 2016
This study aimed to evaluate the effect of alternative products and thermotherapy, singly and in combination, on the physicochemical quality and controlling decay of ‘Pedro Sato’ guavas. Initially the treatments with calcium chloride, potassium phosphite, 1-methylcyclopropene (1-MCP), cassava starch, ethanol followed by chlorine (ethanol+chlorine) and thermotherapy were evaluated for eight days of fruits storage at 22°C. In a second step, four treatments were selected (cassava starch, 1-MCP, thermotherapy and ethanol+chlorine) and evaluated the association of two, applied sequentially, during eight days of fruits storage at 25 °C. The 1-MCP treatment and cassava starch were the most effective in keeping the physicochemical quality of ‘Pedro Sato’ guavas, slowing the weight loss, change of skin color, and contributing to firmness retention. Greater reduction in fruit rot was found in thermotherapy, cassava starch and 1-MCP treatments. The associations of 1-MCP/cassava starch and thermotherapy/cassava starch were the most effective treatments to maintain the quality of ‘Pedro Sato’ guavas, slowing the weight loss, change of skin color, and loss of firmness. Association treatments reduced incidence of decay, especially the ethanol+chlorine/ thermotherapy and thermotherapy/cassava starch that were more efficient until the fourth day of storage. The rots incidence correlated with parameters of skin color and firmness for most association treatments. In general, it is recommended the thermotherapy/cassava starch for guavas stored at 22-25ºC as a way of maintaining the physicochemical quality and delaying at least two days the symptoms of decay. © 2016, Sociedade Brasileira de Fruticultura. All rights reserved.
Bora K.C.,Biologa |
Brito G.S.,Contestado University |
Auer C.G.,Federal University of Paraná |
Santos A.F.D.,Federal University of Paraná |
Wrege M.S.,Federal University of Paraná
Summa Phytopathologica | Year: 2016
The culture of eucalyptus in the state of Paraná, Brazil, provides raw materials for the production of cellulose, coal, treated wood and lumber. Among the major fungal diseases, rust caused by Puccinia psidii can be pointed out as the most important one. Several forms to control this disease can be cited, especially the planting of resistant clones in areas of climatic conditions less favorable to the occurrence of this disease. The choice for areas of low climatic risks can be made by means of climate zoning. Thus, the aim of this study was to develop a climate favorability zoning for Eucalyptus rust, in Paraná State, Brazil, based on temperature and leaf wetness duration for urediniospore germination and infection by P. psidii. These data were applied in models to produce monthly maps of the disease distribution, according to the favorability to the disease occurrence: ‘highly favorable’, ‘favorable’, ‘scarcely favorable’ and ‘unfavorable’. The generated maps were validated by means of comparison with points of natural rust occurrence in Paraná State. It was concluded that spring and summer were the seasons most favorable to the disease, whereas winter was the least favorable season. The central region of the state, in the zone of transition between the tropical climate of the North and the temperate climate of the South, is more favorable to the occurrence of rust, and the South and the North regions are less favorable for different reasons, due to the low temperature and humidity, respectively. © 2016, Universidade Estadual Paulista (UNESP). All rights reserved.
Krinski D.,Ecologia e Conservacao da Biodiversidade |
Krinski D.,Federal University of Paraná |
Massaroli A.,Biologa |
Massaroli A.,Federal University of Paraná |
And 2 more authors.
Revista Brasileira de Fruticultura | Year: 2014
The use of plants compounds for the control of insects has increased worldwide. This occurs because the vegetal insecticides contains biodegradable compounds, nontoxic products and potentially suitable for use in pest control. Plants of the family Annonaceae are standing out as biopesticides because they are bioactive naturally in addition to presenting cytotoxic activity, antitumor, vermifuge, antimicrobial, immunosuppressive, anti-emetic, inhibiting appetite, antimalarial and also insecticide. The insecticidal activity of Annonaceae is due to the presence of acetogenins, substances that act on mitochondria inhibiting the NADH -ubiquinone oxidoreductase, causing the death of insects. In this review we report the use of Annonaceae in insect control, showing that so far, only 42 species of Annonaceae have information insecticidal activity against just over 60 species of insect pests. This information shows that much research is still needed, especially to get to know the insecticidal activity of other Annonaceae species, in addition to its effects on insect pests not yet studied. So we will have as an alternative to sustainable development, new vegetal insecticides such as those obtained from different Annonaceae species, which can act as an additional tool to balance the excesses of agriculture chemical or conventional.
Rangely J.,Biologa |
Rangely J.,Federal University of Alagoas |
Fabre N.N.,Federal University of Alagoas |
Tiburtino C.,Federal University of Alagoas |
Batista V.S.,Federal University of Alagoas
Boletim do Instituto de Pesca | Year: 2010
The knowledge of the fishery dynamics is important to managers develop adequate measures. To support managers decision making in the Alagoas coast, the present study intended to determine the existence of interactions between physical and operational characteristics of the fishing fleet and the marine ichthyofauna exploited in northeast Brazil. From May, 2007 to April, 2008, interviews with fishermen were conducted based using structured and unstructured questionnaires. There were recorded and mapped 59 fishing grounds that has been exploited both by gillnet boats ("caceia") and line-fishing vessels. Four of these fishing grounds stand out due to the high frequency of use, but also there were indicated as key fishing grounds. We identified and classified 99 fish species into three categories: reef, estuarine and epipelagic. Two fishing strategies were identified within the area of operation of the fleet studied: coastal fishing and slope fishing. This study revealed a close relationship between the spatial distribution of the fleet, exploited species, fishing gears, fish yield and value. The result was a categorization of the fishing area. These categories must be considered by fishery managers, and may gives a better production and helps the conservation of fishing resources exploited in the Alagoas coastal waters.
The importance of bioprospecting of microorganisms in areas contaminated by petroleum-derived products [A importância da bioprospecção de microrganismos em áreas contaminadas com produtos derivados do petróleo]
Brito G.C.B.,Centro Universitario Una |
De Souza D.B.,Centro Universitario Una |
Vasconcelos F.C.W.,Doutora em Ciencias |
Da Conceicao Braga L.,Biologa
Revista em Agronegocio e Meio Ambiente | Year: 2010
The remarkable contribution of the oil sector to world economy leads to a demand that requires more structuring of the sector's production. Concerns related to environmental contamination possibility by petroleum products are on the increase. Pollution of soil, fresh water sources and sea environments caused by petroleum hydrocarbons causes severe problems to human, animal and vegetation health. Current bibliographical revision presents the characteristics of these pollutants, the processes involved in soil contamination, with special reference to biodegradation mechanism, and the bioprospecting of microorganisms capable of such processes. Degrading petroleum hydrocarbons is the property of several microorganism groups. The biological process of remediation, known as bioremediation, is caused by a stimulus in the environment's natural biodegradation. Bioprospecting of naturally selected organisms in areas contaminated by petroleum-derived substances represents an important strategy for the areas' bioremediation.
Costa T.S.A.,Embrapa Recursos Geneticos e Biotecnologia |
Wondracek D.C.,Biologa |
Lopes R.M.,Biologa |
Vieira R.F.,Embrapa Recursos Geneticos e Biotecnologia |
Ferreira F.R.,Embrapa Recursos Geneticos e Biotecnologia
Revista Brasileira de Fruticultura | Year: 2010
Canistel (Pouteria campechiana) is a native fruit from Central America and Mexico. This fruit still not known in Brazil, it presents an orange-yellow pulp rich in carotenoids, which has attracted interest as a potential source of vitamin A. The purpose of this study was to determine the carotenoids content and pro-vitamin A values in the pulp of canistel, as well as the percentage of moisture and lipids in the pulp and seeds. Carotenoids were separated by open column chromatography. The content of total carotenoids was 226 ± 4 μg/g. Violaxantin and neoxantin were the predominant carotenoids with 196 ± 5 μg/g followed by zeta-carotene, beta-carotene 5,6-epoxide, beta-carotene and phytofluene. The seeds presented higher levels of total lipids with 4.6 ± 0.2 %, while pulp had 0.61 ± 0.03 % of total lipid. These results indicate that this fruit presented very high levels of total carotenoids when compared to other fruits regularly consumed, and may be considered as a good source of pro-vitamin A (59 ± 6 RAE/100g). However, the main carotenoids found in Canistel have no pro-vitamin A activity.
Bio.Lo.Ga | Date: 2015-12-16
The present invention concerns the use of perfluoropolyether phosphates, in particular perfluoropolyether diphosphates, as stabilizing agents for polyphenols in cosmetic and/or dermatological compositions for topical application, and it also concerns cosmetic and/or dermatological compositions containing polyphenols and optionally vitamin E and free ascorbic acid, stabilized by perfluoropolyether diphosphates.