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Search Results: 1 - 10 of 2176 matches for " Silvio Favero "
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Avalia o de óleos essenciais de plantas aromáticas com atividade inseticida em Triatoma infestans (Klug, 1834) (Hemiptera: Reduviidae) = Evaluation of essential oils with insecticidal activity in Triatoma infestans (Klug, 1834) (Hemiptera: Reduviidae)
Suellem Petilim Gomes,Silvio Favero
Acta Scientiarum : Health Sciences , 2011,
Abstract: A doenca de Chagas e um dos maiores problemas de saude publica na America Latina. Neste trabalho, foi avaliada a acao inseticida de oleos essenciais de Anacardium humile Cymbopogon nardus, Ocimum basilicum e Eucalyptus urograndis em ninfas do 3 e 4 estadios dedesenvolvimento de Triatoma infestans por acao topica e pressao a vapor (fumigacao). Para o teste topico foram realizadas duas repeticoes cada uma com cinco ninfas de 3 e 4 estadios de desenvolvimento de T. infestans. Foi aplicado 1 êL de cada concentracao na regiao dorsal de cada individuo. Para o teste de fumigacao foram utilizados potes de 2 L com tampa vedante. Os oleos essenciais de O. gratissimum e E. urograndis apresentaram atividadeinseticida para T. infestans, e A. humile e C. nardus apresentaram em media 5 e 15% de mortalidade, respectivamente. Para fumigacao, somente o oleo de E. urograndis teve efeito, com 100% de mortalidade sobre T. infestans , sendo que para os outros oleos nao foiobservado efeito de fumigacao. Esse trabalho relata pela primeira vez a acao inseticida de E. urograndis em potes fumigenos para o controle de triatomineos. Os resultados sao importantes devido a busca por novos modelos moleculares com acao inseticida em triatomineos resistentes aos inseticidas sinteticos. Chagas disease is a major public health problem in Latin America. This work aimed to evaluate the insecticide action of essential oils of Anacardium humile, Cymbopogon nardus, Ocimum basilicum and Eucalyptus urograndis on Triatoma infestans nymphs of third and fourth stages of development by topic action and steam pressure (fumigation). Two repetitions were performed at the topic test with five nymphs of third and fourth stages of development of T. infestans. It was applied 1 êL of each concentration on the dorsal region of each nymph. Two-liter pots with sealing covers were used at the fumigation test. The essential oils of O. gratissimum and E. urograndis showed insecticidal activity against T. infestans and A. humile and C. nardus showed an average of 5 and 15% mortality, respectively. For the fumigation, only the E. urograndis oil had effect with 100% of mortality on T. infestans and for the other oils it was not observed any effect of the steam pressure. This paper describes for the first time the insecticidal action of E. urograndis in smoke canister to control bugs. The results are important to the search for new molecular models with insecticidal action in bugs which are resistant to synthetic insecticides.
Produ??o de Anagasta kuehniella (Zeller) (Lepidoptera: Pyralidae) com a utiliza??o de fubá de milho na dieta artificial
Lima Filho, Mauri;Favero, Silvio;Lima, José Oscar G. de;
Neotropical Entomology , 2001, DOI: 10.1590/S1519-566X2001000100007
Abstract: to reduce the cost of obtaining anagasta kuehniella (zeller), which is an alternative host for mass production of trichogramma galloi zucchi, we tested the substitution of yellow corn meal in different proportions for whole wheat meal. we compared the standard diet (97.0% whole wheat, 3.0% yeast) with four experimental diets: corn meal (97.0%) and yeast (3.0%); corn meal (62.7%), whole wheat meal (34.3%) and yeast (3.0%); corn meal (48.5%), whole wheat meal (48.5%) and yeast (3.0%); corn meal (34.3%), whole wheat meal (62.7%) and yeast (3.0%). rearing room was maintained at 25±1oc; 12h of photophase and 70±10% rh. the diets containing corn meal, whole wheat meal and yeast produced the best results, which were comparable to those found for the standard diet in all aspects investigated: egg viability and weight, fecundity, developmental time, survival of immature stages, and adult weight. among the diets containing corn meal, the one with 48.5% of this ingredient promoted the best survival ratio of the immature stages. in addition, adult females originated from these immatures were more fecund than those from immatures which fed the diet containing corn meal and yeast only. but we did not find any significant difference with regard to the others factors investigated.
Caracteriza??o morfológica, viabilidade e vigor de sementes de Tabebuia aurea (Silva Manso) Benth. & Hook. f. ex. S. Moore
Oliveira, Ademir Kleber Morbeck de;Schleder, Eloty Dias;Favero, Silvio;
Revista árvore , 2006, DOI: 10.1590/S0100-67622006000100004
Abstract: tabebuia aurea is found in areas of cerrado, caatinga, amazon forest and pantanal., it is used medicinally, for landscaping, and as timber for construction. for presenting wide use and distribution, the objective of this study was to characterize morfologically and analyze the viability and vigor of the harvested seeds of this species originated from the cerrado. the seeds were germinated immediately after harvest and at 30, 60 and 90 days after the storage in laboratory and field, being also tested with tetrazolium. seeds measured, in average, 57.8 x 20.6 x 3.1 mm (with wings) and 17.3 x 13.3 x 1.7 mm (without wings), which were antisymmetrical . the average seed weight was 13.18 g (with wings) and 11.55 g (without wings). t. aurea presented greater viability immediately after harvest, greater percentage of germination in laboratory 30 days after storage, and greater percentage of accumulated germination on field surface. seed viability, checked by the tetrazolium test, gave results similar to the ones obtained from the germination test in laboratory, indicating that it is satisfactory to test the viability of this species.
Caracteriza o morfológica, viabilidade e vigor de sementes de Tabebuia aurea (Silva Manso) Benth. & Hook. f. ex. S. Moore
Oliveira Ademir Kleber Morbeck de,Schleder Eloty Dias,Favero Silvio
Revista árvore , 2006,
Abstract: A espécie Tabebuia aurea é encontrada em áreas de Cerrado, Caatinga, Floresta Amaz nica e Pantanal, sendo utilizada para fins ornamentais, medicinais, constru o civil, carpintaria e produ o de carv o, entre outros. Por apresentar ampla utiliza o e distribui o, os objetivos deste estudo foram caracterizar morfologicamente e analisar a viabilidade e o vigor das sementes dessa espécie quando colhidas e armazenadas por diferentes períodos. As sementes foram germinadas recém-colhidas, 30, 60 e 90 dias após o armazenamento em laboratório e em campo, sendo também submetidas ao teste de tetrazólio. As sementes mediram, em média, 57,8 x 20,6 x 3,1 mm (com alas) e 17,3 x 13,3 x 1,7 mm (sem alas), sendo assimétricas. Seu peso médio foi de 13,18 g (com alas) e 11,55 g (sem alas). As sementes apresentaram maior viabilidade quando recém-colhidas, maior porcentagem de germina o em laboratório após 30 dias de armazenamento e maior porcentagem de germina o acumulada a campo quando semeadas na superfície. A viabilidade das sementes, medida através do teste de tetrazólio, apresentou resultados similares aos obtidos por meio do teste de germina o em laboratório, indicando ser esse teste adequado para medir a viabilidade desta espécie.
Distribui o da entomofauna associada às macrófitas aquáticas na vazante do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil = Distribution of entomofauna associated with aquatic macrophytes in the reflux of the Correntoso river, Pantanal do Negro, Mato Grosso do Sul State, Brazil
Fábio Henrique da Silva,Silvio Favero,José Sabino,Silvio Jacks dos Anjos Garnés
Acta Scientiarum : Biological Sciences , 2009,
Abstract: Este trabalho teve como objetivo pesquisar a distribui o de insetos associados a macrófitas aquáticas e a similaridade dos sítios de coleta, no período de vazante, em um trecho do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil. Os sítios de coleta foram determinados conforme a mudan a na estrutura da forma o ripária, caracterizados como abertos com comunica o com campos inundáveis; intermediários sem comunica o com campos inundáveis; fechados sem comunica o com campos inundáveis. Foram realizadas trêscoletas durante o período de vazante, em seis sítios de coletas. Os organismos foram coletados utilizando rede D com malha de 300 mm e esfor o amostral de cinco lances de rede em raízes de macrófitas aquáticas. Foi analisada a riqueza de famílias, a abundancia absoluta e relativa dos insetos encontrados, a similaridade dos sítios de coleta por análise de agrupamento, utilizando distancia euclidiana e liga o completa, índice de diversidade de Shannon-Wienner, com log2.Foram registradas 64 famílias de dez ordens da Classe Hexapoda, totalizando 2.525 indivíduos, 2.405 aquáticos e semi-aquáticos e 120 terrestres. Os sítios de coleta n o apresentaram padr o fixo de similaridade, e a forma o dos grupos ocorreu de forma distinta a cada coleta. This work aimed ato research the distribution of insects associated with aquatic macrophytes and the similarity among collection sites during the reflux period in a stretch of Correntoso river, Pantanal do Negro, Mato Grosso do Sul State, Brazil. The collection sites were determined by changes in the riparian formation structure, characterized as open when there is communication with flooded fields and intermediary and closed when there is not any communication withflooded fields. Three collections were taken at six sample sites, during reflux periods. The organisms were collected using a D net, 300 mm mesh, with samples from five nets thrown in roots of aquatic macrophytes. Family richness, absolute and relative abundance of the insects found, and similarity of collection sites were analyzed using Euclidian distance and complete connection, Shannon-Wiener diversity index, with log2. Sixty-four families from 10 orders of Hexapoda class were registered, totaling 2,525 individuals – 2,405 of them aquatic and semiaquatic, and 120 terrestrial. The collect sites did not present a fixed model of similarity, and the formation of groups occurred in distinct forms at each collection.
Caracteriza??o morfológica, viabilidade e vigor de sementes de Tabebuia chrysotricha (Mart. ex. DC.) Standal
Oliveira, Ademir Kleber Morbeck de;Scheleder, Eloty Justina Dias;Favero, Silvio;
Revista árvore , 2008, DOI: 10.1590/S0100-67622008000600006
Abstract: the species tabebuia chrysotricha occurs in the northeastern through southern brazil in the atlantic pluvial forest and gallery wood in the cerrado area, disseminated by arborization of streets and squares. its wood is resistant, used in civil construction, also producing a substance pigment used for silk and cotton dyeing. the aim of this work was to morphologically characterize and analyze the viability and vigor of its seeds, when harvested in a cerrado area. the seeds were measured and germinated postharvest 30, 60 and 90 days after storage under laboratory and field conditions, being also submitted to the tetrazolium test. the seeds measured, on average, 27.8 x 7.2 x 0.3 mm (with wings) and 6.4 x 4.7 x 0.3 mm (without wings). average weight was 0.40 g (with wings) and 0.31 g (without wings). the seeds presented greater viability under laboratory conditions 30 days after storage and higher percentage of accumulated germination under field conditions, when disseminated on the surface, during post harvest. seed viability was measured by the tetrazolium test, and presented similar results to those obtained by the germination test, in the laboratory, indicating that it is adequate to measure viability of this species.
índices bióticos para avalia o da qualidade ambiental em trechos do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil = Biotic indexes for the evaluation of environmental quality in stretches of the Correntoso river, Pantanal do Negro, Mato Grosso do Sul State, Brazil
Fábio Henrique da Silva,Silvio Favero,José Sabino,Sílvio Jacks dos Anjos Garnés
Acta Scientiarum : Biological Sciences , 2011,
Abstract: Este trabalho teve como objetivo pesquisar a estrutura da comunidade de insetos aquaticos, utilizando esta comunidade como indicadora da qualidade ambiental de um trecho do rio Correntoso, Pantanal do Negro, Mato Grosso do Sul, Brasil. Foram realizadas seis campanhas de coleta em diferentes periodos sazonais: vazante, seca e cheia. Os organismos foram coletados utilizando rede D com malha de 300 Ym eesforco amostral de cinco lances de rede nas raizes dos bancos de macrofitas. Foram comparados tres ambientes (aberto, intermediario e fechado), por juncao dos dados obtidos de seis sitios de coleta. Foi analisada a riqueza, abundancia absoluta e relativa das familias de insetos amostrados e a avaliacao da qualidade da agua usando o indiceBMWP, indice BMWP-ASPT, indice IBF e indice de diversidade de Shannon-Wienner, com log2. Foram registradas 60 familias pertencentes a 12 ordens da Classe Insecta, totalizando 19.773 individuos coletados. Entre os indices aplicados, o indice BMWP foi o que melhor representou as condicoes do ambiente estudado. This work aimed to research the aquatic insect community structure using this community as a bioindicator of the environmental quality in a stretch of the Correntoso river, in Pantanal do Negro, Mato Grosso do Sul, Brazil. Six collections were taken in different seasonal periods; ebb, dry and wet. The organisms were collected using a 300 Ym mesh D net sweeping five times through the roots of macrophyte banks at each sample. Three environments were compared (open, intermediary, closed) by adding the information from six collection sites. Family richness, absolute and relative abundance ofinsect samples and an evaluation of water quality were analyzed by using the BMWP index, BMWP-ASPT index, IBF index and Shannon diversity index, with log2. A total of 60 families from 12 orders of Insecta Class were recorded, totaling 19,773 individuals. Among the indexes applied, the BMWP index was the one that best represented the conditions of the studied environment.
Sorovares de leptospiras predominantes em exames sorológicos de bubalinos, ovinos, caprinos, eqüinos, suínos e c es de diversos estados brasileiros
Favero Andrea Cecília Mercaldi,Pinheiro S?nia Regina,Vasconcellos Silvio Arruda,Morais Zenáide Maria
Ciência Rural , 2002,
Abstract: Em estudo retrospectivo abrangendo os anos de 1984 a 1997, foram realizados 15.558 exames sorológicos para leptospirose (SAM, com cole o de 24 sorovares), que incluíram: 284 ovinos, 879 bubalinos, 983 c es, 1.941 caprinos, 2.903 eqüinos e 8.568 suínos, distribuídos percentualmente por estado da seguinte forma: ovinos - SP (100%); bubalinos - SP (100%); c es - SP (80,7%), RS (0,10%), SC (0,10%) e PI (19,0%); caprinos - SP (33,1%), PB (63,7%) e CE (3,2%); eqüinos - SP (79,3%), RS (9,98%), SC (0,62%), PR (2,5%), RJ (0,17%), MG (1,96%), MT (3,99%), PB (1,3%) e PI (0,03%); suínos - SP (61,91%), RS (0,3%), SC (5,95%), PR (3,67%), RJ (0,88%), MG (24,38%), GO (1,12%), SE (0,2%), PE (0,90%), CE (0,34%) e MA (0,1%). A distribui o temporal dos animais examinados incluiu: para a espécie ovina - 54,5% referentes aos anos 1996 e 97, 33,3% referentes a 89 e 90 e 12,2% aos outros anos; espécie bubalina - 21,7% no intervalo de 1984 a 95 e 78,83% entre 96 e 97; espécie canina - 16,91% entre 1984 e 92 e 83,09% entre 1993 e 97; caprinos - 6,97% entre 1984 e 91 e 93,09% entre 1992 e 97, sendo que 49% das amostras foram referentes ao ano de 1992; eqüinos - 18,1% no intervalo de 84 a 90 e 81,9% de1991 a 97; suínos - 61,16% referentes aos anos 90, 91, 95 e 96. As médias de animais reatores e variantes mais freqüentes por espécie foram: ovinos - 0,70% de soropositividade e rea es mais freqüentes para a variante icterohaemorrhagiae; bubalinos - 43,7% de positivos e variantes hardjo seguida de pomona; c es - soropositividade de 17,7% e rea es para as variantes copenhageni e icterohaemorrhagiae no estado de SP e pyrogenes no PI; caprinos - 4,17% de positividade e variantes icterohaemorrhagiae e grippotyphosa no CE, icterohaemorrhagiae na PB e pyrogenes em SP; eqüinos - 29% de soros positivos e variantes icterohaemorrhagiae no PR, SC, SP, RJ e MG, grippotyphosa no MT, pyrogenes na PB e patoc no RS; suínos - soropositividade de 24,46% e grippotyphosa seguida de icterohaemorrhagiae em MG, pomona no RS, pomona e icterohaemorrhagiae em PE e RJ, autumnalis no CE e icterohaemorrhagiae em GO, PR, SC e SP.
The Land-Use Consequences of Woody Biomass with More Stringent Climate Mitigation Scenarios  [PDF]
Alice Favero, Robert Mendelsohn
Journal of Environmental Protection (JEP) , 2017, DOI: 10.4236/jep.2017.81006
Abstract: Integrated assessment models increasingly rely on biomass for energy with ever more stringent mitigation policies. The stringency of mitigation will therefore have large effects on land use. As discussed in the literature, crop bio-energy will lead to substantial pressure to increase deforestation. This paper consequently explores using woody biomass for bioenergy. The paper combines the IAM WITCH with a global dynamic forestry model GTM to determine the optimal size of the woody biomass market, the effects on the timber market, and the resulting forestland under two alternative mitigation strategies. This paper predicts that moving from a moderate to a stringent mitigation policy would increase the demand for woody biomass from 3.7 to 5.2 billion m3/yr, increasing forestland by 1049 to 1890 million ha, and shrinking farmland by 748 to 1550 million ha. The stringency of mitigation will therefore have large effects on land use.
Sanitary problems related to the presence of Ostreopsis spp. in the Mediterranean Sea: a multidisciplinary scientific approach
Del Favero,Giorgia; Sosa,Silvio; Pelin,Marco; D'Orlando,Elisabetta; Florio,Chiara; Lorenzon,Paola; Poli,Mark; Tubaro,Aurelia;
Annali dell'Istituto Superiore di Sanità , 2012, DOI: 10.4415/ANN_12_04_08
Abstract: the increased presence of potentially toxic microalgae in the mediterranean area is a matter of great concern. since the end of the last century, microalgae of the genus ostreopsis have been detected more and more frequently in the italian coastal waters. the presence of ostreopsis spp. has been accompanied by the presence of previously undetected marine biotoxins (palytoxins) into the ecosystem with the increased possibility of human exposure. in response to the urgent need for toxicity characterization of palytoxin and its congeners, an integrated study encompassing both in vitro and in vivo methods was performed.
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