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Search Results: 1 - 10 of 178919 matches for " Rubens Pinto de; "
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Contribution to knowledge of the genus Dimecoenia Cresson, 1916: V. On new species from Rio de Janeiro,RJ (Diptera: Ephydridae)
Mello, Rubens Pinto de;Oliveira, Sebasti?o José de;
Memórias do Instituto Oswaldo Cruz , 1992, DOI: 10.1590/S0074-02761992000500028
Abstract: new species of several speciemens of several specimens from rio de janeiro county, caught on the spinosa platensis microalgae breeding in the concret thanks is described.
Economic optimization method to design telescope irrigation of multiples outlets
Pinto, Marinaldo F.;Camargo, Antonio P. de;Coelho, Rubens D.;
Engenharia Agrícola , 2012, DOI: 10.1590/S0100-69162012000400017
Abstract: in this study is presented an economic optimization method to design telescope irrigation laterals (multidiameter) with regular spaced outlets. the proposed analytical hydraulic solution was validated by means of a pipeline composed of three different diameters. the minimum acquisition cost of the telescope pipeline was determined by an ideal arrangement of lengths and respective diameters for each one of the three segments. the mathematical optimization method based on the lagrange multipliers provides a strategy for finding the maximum or minimum of a function subject to certain constraints. in this case, the objective function describes the acquisition cost of pipes, and the constraints are determined from hydraulic parameters as length of irrigation laterals and total head loss permitted. the developed analytical solution provides the ideal combination of each pipe segment length and respective diameter, resulting in a decreased of the acquisition cost.
Comportamento de dípteros muscóides frente a substratos de oviposi??o, em laboratório, no Rio de Janeiro, RJ, Brasil
d'Almeida, José Mario;Mello, Rubens Pinto de;
Memórias do Instituto Oswaldo Cruz , 1996, DOI: 10.1590/S0074-02761996000100024
Abstract: how adult females of calyptrate diptera recognize the appropriate breeding substrate is a matter of controversy. among holometabolic insects, the feeding opportunities of immature stages are generally determined by the adult female choice of an oviposition site. the ovipositional and larvipositional substrate preference for the synanthropic flies (chrysomya megacephala, c. putoria, phaenicia cuprina: calliphoridae; atherigona orientalis, synthesiomyia nudiseta: muscidae; ravinia belforti, parasarcophaga ruficornis, peckia chrysostoma: sarcophagidae) is presented in this work. the substrate used for testing were the following: bovine minced meat, fish (sardine), bovine liver, shrimp, squid, human faeces and banana. bovine minced meat was the ovipositional and larvipositional substrate preferred by seven species. human faeces were preferred by r. belforti.
Comportamento reprodutivo de fêmeas de Stomoxys calcitrans (L.) (Diptera: Muscidae) criadas isoladamente em laboratório
Mello, Rubens Pinto de;Garcia, Maria Luzia Maués;
Memórias do Instituto Oswaldo Cruz , 1988, DOI: 10.1590/S0074-02761988000300017
Abstract: starting from adults derived of stomoxys calcitrans colony established in the 'esta??o para pesquisas parasitológicas w. o. neitz, universidade federal rural do rio de janeiro", under temperature of 27°c and 70-80% of relative humidity, one female and two males were isolated in individual cages to the observations of some biological parameters formely determined as number of ovipositant female, real number o eggs by female, oviposition periodicity and female longevity. after 4 repetitions with 6 fenales at the first and second, 7 and 8 females at the third and fourth repetitions, respectively, and a total of 27 isolated females, only 10 layed eggs (37.0%); the total number of layed eggs was 2,254 with a mean of 834 eggs by female; the females had a oviposition period that varied from 3 to 17 days it happening as average 10.2 days. the oviposition rhytm changed from 3 to 7 ovipositions, with intervals changing since too little 24 hours until 6 days. the females longevity were about 17 to 38 days.
Lethal effect of a bait for Rhodnius prolixus (Hemiptera: Reduviidae), the vector of Chagas' disease, containing hexachlorocyclohexane (HCH), under laboratory conditions
Lima, Marli Maria;Rey, Luis;Mello, Rubens Pinto de;
Revista do Instituto de Medicina Tropical de S?o Paulo , 1992, DOI: 10.1590/S0036-46651992000400005
Abstract: the lethal effect of a bait containing an aqueous hexachlorocyclohexane (hch) suspension at the concentration of 1g/l and maintained at room temperature was studied in the laboratory over a period of 12 weeks. the suspension was placed in a latex bag hanging inside a 1000-ml beaker tightly covered with nylon netting, and left there with no changes for 85 days. sixteen groups of r. prolixas bugs, consisting on average of 30 specimens each, were successively exposed to the bait and observed at different intervals for one week each. the mortality rate was 100% for all groups, except for the 16th, whose mortality rate was 96.7%. as the groups succeeded one another, mortality started to occur more rapidly and was more marked at the 6- and 24-h intervals. later tests respectively started at 6:00 a.m. and 6:00 p.m. showed that diurnal and nocturnal periodicity in the offer of food had no effect on mortality. first- and 2nd- instar nymphs and adults male were more sensitive and 5th- instar nymphs were more resistant to the active principle of the bait.
Lethality of triatomines (Hemiptera: Reduviiae), vectors of Chagas' disease, feeding on blood baits containing synthetic insecticides, under laboratory conditions
Lima, Marli Maria;Rey, Luis;Mello, Rubens Pinto de;
Revista do Instituto de Medicina Tropical de S?o Paulo , 1991, DOI: 10.1590/S0036-46651991000600002
Abstract: a laboratory study was conducted to test the toxicity of synthetic insecticides added to defibrinated sheep blood kept at room temperature and offered as food to the following triatomine species: triatoma infestans, panstrongylus megistus, triatoma vitticeps, triatoma pseudomaculata, triatoma brasiliensis and rhodnius prolixus. the insecticides used, at a concentration of 1g/l, were: hch, ddt, malathion and trichlorfon, and the lethalithy observed at the end of a 7-day period varied according to the active principle of each. hch was the most effective by the oral route, killing 100% of the insects, except p. megistus (95.7%) and t. pseudomaculata (94.1%). trichlorfon killed the insects at rates ranging from 71.8% (t. vitticeps) to 98% (r. prolixus). malathion was slightly less efficient, killing the insects at rates from 56.8% (t. vitticeps) to 97% (t.brasiliensis). ddt was the least effective, with a killing rate of 10% (t. vitticeps) to 75% (t.brasiliensis). since the tests were performed at room temperature, we suggest that baits of this type should be tried for the control of triatomines in the field.
Suiting Dynamic Models of Fixed-Bed Catalytic Reactors for Computer-Based Applications  [PDF]
Eduardo Coselli Vasco de Toledo, Edvaldo Rodrigo Morais, Delba Nisi Cosme Melo, Adriano Pinto Mariano, Jo?o F. C. A. Meyer, Rubens Maciel Filho
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.37094
Abstract: This work investigated the applicability of heterogeneous and pseudo-homogeneous models to predict the dynamic behavior of a fixed-bed catalytic reactor. Some issues concerning the dynamic behavior of the system were discussed, such as the prediction of the inverse response phenomenon. The proposed models (Het- erogeneous I and II and Pseudo-homogeneous) were able to predict with qualitative similarity the main characteristics of the dynamic behavior of a fixed-bed catalytic reactor, including the inverse response. The computational time demanded for the solution of the heterogeneous models was 10 to 50% longer than in the case of the pseudo-homogeneous model, making the use of the former suitable for applications where computational time is not the major restriction (off-line applications). On the other hand, when on-line applications are required, the simplified model (Pseudo-homogeneous model) showed to be a good alternative because this model was able to predict (qualitatively) the dynamics of the reactor using a faster and easier numerical solution.
Morfologia e dura??o dos ínstares larvais de Chrysomya putoria (Wiedemann) (Diptera, Calliphoridae), em laboratório
Oliveira, Marcio Sacramento de;Mello, Rubens Pinto de;Queiroz, Margareth Maria de Carvalho;
Revista Brasileira de Entomologia , 2007, DOI: 10.1590/S0085-56262007000200016
Abstract: the objective of this work was to describe the morphology and the developmental time of chrysomya putoria larvae, a fly of public health and forensic importance. the samples were collected at 2 hr intervals, during the first 56 hr and at 12 hr intervals thereafter, until all mature larvae had abandoned the diet. the total developmental time for chrysomya putoria larvae at 27 oc was 92 hr, with a mean length of 13.42 mm. the larvae presented unique morphological characteristics which differentiated them from other exotic and autochthonous species found in brazil. the cephalopharyngeal skeleton of the third instar larvae is robust and sclerotized; the mouth hook is completely pigmented and curved; the posterior end is wider than the anterior, being slightly pointed. the accessory oral sclerit is absent and the dorsal and ventral horns have areas with less pigmentation. it is possible to visualize an area with no pigmentation adjacent to the horns, outstanding in size near the ventral corn with a well delimited medial incision. the anterior spiracles presented 10 to 11 ramifications, open peritrema and the presence of a spiracular bud from the second instar on.
The effect of different proportions of males and females over the Chrysomya albiceps (Wiedemann 1819) (Diptera, Calliphoridae) biotic potential and longevity under laboratory conditions
Queiroz, Margareth Maria de Carvalho;Mello, Rubens Pinto de;Freire, Nicolau Maués da Serra;
Memórias do Instituto Oswaldo Cruz , 1996, DOI: 10.1590/S0074-02761996000200023
Abstract: chrysomya albiceps specimens were derived from colonies kept under laboratory conditions. the oviposition period, total number of eggs-mass and the weight of the eggs-mass (average/female) presented significant differences between colonies regarding the sexual ratio of 1male/1female (situation i), when compared to the other ratios (1male/3female, situation ii), (1male/5female, situation iii), (3male/1female, situation iv) and (5 male/1female, situation v). it was ascertained that the increase in the proportion of females, resulted in higher weight and greater number of ovipositions and lenghtening of the period of oviposition, leads to a decrease in their lifespan.
Sobre o financiamento no Plano de Desenvolvimento da Educa??o
Camargo, Rubens Barbosa de;Pinto, José Marcelino de Rezende;Guimar?es, José Luiz;
Cadernos de Pesquisa , 2008, DOI: 10.1590/S0100-15742008000300014
Abstract: this article presents a preliminary analysis of pde (education development plan) that was launched by the brazilian federal government in april 2007, in order to address some expectations, impasses, and impacts. much of the uneasiness and doubts we approach arose in the itinerant seminar "the education development plan - ped - under discussion in s?o paulo public universities", in which specialists from different institutions had the opportunity to debate the plan with those who were responsible for creating and implementing the plan. we have organized the analysis in three parts. in the first part, we discuss some presuppositions of national education funding and show that brazil can and should invest more resources in order to attain adequate social and educational development. in the second part, we analyze documents of the ministry of education evidencing the conceptions on which the pde is based with regard to funding of the 40 proposed actions. in the third part, the authors take a position on the form of funding adopted and the resources foreseen or allocated to carry out actions. finally, a series of issues concerning the plan are raised from a propositional perspective.
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