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Search Results: 1 - 10 of 49154 matches for " Luis Presley Serejo dos;Leite "
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Degree of conversion of adhesive systems light-cured by LED and halogen light
Arrais, Cesar Augusto Galv?o;Pontes, Fenelon Martinho;Santos, Luis Presley Serejo dos;Leite, Edson Roberto;Giannini, Marcelo;
Brazilian Dental Journal , 2007, DOI: 10.1590/S0103-64402007000100012
Abstract: this study evaluated the effect of blue light emitting diode (led) and quartz tungsten halogen (qth) on the degree of conversion (dc) of an etch-and-rinse single bond adhesive system (sb) and a mixture composed of primer solution and resin bond from clearfil se bond self-etching adhesive system (cb) using fourier transform infrared analysis (ftir). adhesives were applied to potassium bromide pellet surfaces and ftir analyses were performed before and after photo-activation for 10 s with either led (freelight 1 - 400 mw/cm2) or qth (xl 3000 - 630 mw/cm2) light-curing units (n=8). additional ftir spectra were obtained from photo-activated samples stored in distilled water for 1 week. the dc was calculated by comparing the spectra obtained from adhesive resins before and after photo-activation. the results were analyzed by two-way split-plot anova and tukey's test (p<0.05). both adhesive systems exhibited low dc (%) immediately after photo-activation (sb/qth: 18.7 ± 3.9; sb/led: 13.5 ± 3.3; cf/qth: 13.6 ± 1.9; cf/led: 6.1 ± 1.0). the dc of samples light-cured with led was lower than dc of those light-cured with qth, immediately after light curing and after 1 week (sb/qth: 51.3 ± 6.6; sb/led: 50.3 ± 4.8; cf/qth: 56.5 ± 2.9; cf/led: 49.2 ± 4.9). the led curing unit used to photo-activate the adhesive resins promoted lower dc than the qth curing unit both immediately after light curing and 1 week after storage in water.
Degree of conversion and molecular weight of one denture base and three reline resins submitted to post-polymerization treatments
Urban, Vanessa Migliorini;Machado, Ana Lucia;Vergani, Carlos Eduardo;Jorge, érica Gouveia;Santos, Luís Presley Serejo dos;Leite, Edson Roberto;Canevarolo, Sebasti?o Vicente;
Materials Research , 2007, DOI: 10.1590/S1516-14392007000200016
Abstract: the effect of post-polymerization treatments (mw-microwave irradiation and wb-water-bath) on the degree of conversion (dc) of three reline resins (ufi gel hard-u, kooliner-k, and tokuso rebase fast-t) and one denture base resin (lucitone 550-l), submitted to two polymerization cycles (ls-short and ll-long), was evaluated by using ft-raman spectroscopy (n = 5). the molecular weight (mw) of the powder of all materials and of k polymerized specimens (control; mw; and wb; n = 3) was analyzed using gpc. dc data were analyzed using kruskal-wallis test (a = .05). for control specimens, there were no significant differences between u (68%) and ll (77%) and among ll, k (81%), and t (84%). ls (92%) had the highest dc (p < 0.05). only material k exhibited an increased dc after wb (p < 0.05). all powders had mw from 4.0 x 105 to 6.5 x 105 and narrow mw distributions (2.1 to 3.6). polymerization and post-polymerization produced k specimens with mw similar to that of k powder.
Rendimento e qualidade de sementes de arroz irrigado em fun??o da aduba??o com boro
Leite, Ricardo Figueiredo Cavalheiro;Schuch, Luis Osmar Braga;Amaral, Ademir dos Santos;Tavares, Lizandro Ciciliano;
Revista Brasileira de Sementes , 2011, DOI: 10.1590/S0101-31222011000400021
Abstract: boron is an essential nutrient for plants, involved in cell growth and flower development. in the reproductive phase, its deficiency reduces male fertility due to damage to microsporogenesis and subsequent pollen tube growth. this study aimed to evaluate the effect of boron application on the agronomic and physiological quality of irrigated rice seeds. boron applied as sodium borate (na2b4o7.10h2 o) at a dosage of 10 kg ha-1, was made at different times (sowing, tillering, panicle differentiation, and booting full flowering). the performance, sterility and yield components of the rice, as well as seed physiological quality, were evaluated. it was found that application of sodium borate at a dosage of 10 kg ha-1 at different growth stages did not cause sterility or affect grain yield, yield components and the physiological quality of irrigated rice seeds of the irga 422cl cultivar.
Riscos e Retornos da Cafeicultura em Minas Gerais: uma análise de custos e diferencia??o
Pereira, Vanessa da Fonseca;Vale, S?nia Maria Leite Ribeiro do;Braga, Marcelo José;Rufino, José Luis dos Santos;
Revista de Economia e Sociologia Rural , 2010, DOI: 10.1590/S0103-20032010000300008
Abstract: this paper aimed to analyze the comparative performance from the minas gerais "cerrado" coffee producers and the south-western conventional coffee producers, according to the returns and the risk level. differentiation and costs were emphasized because they were the strategic options adopted by the grower in these two regions the margins and potential loss of these two producer groups were measured, in a way that a relation between risks and returns could be presented. the returns were estimated by an index that relates costs and prices - operational margin -, and risk analysis was conducted based on value at risk estimates. the results indicated that, besides obtaining better returns, the minas gerais "cerrado" producers had smaller loss potential than those from the south-west. the favorable results obtained by the minas gerais "cerrado" coffee producers were related to the differences in productive costs and coffee quality. improved product quality and productive management were the most relevant aspects found to enhance the performance of the south-western coffee producer. as for the "cerrado" coffee production, the importance of maintaining the efforts related to differentiation and to the productivity was pointed out.
Genótipos de milho com alta capacidade para embriogênese somática e regenera??o de plantas obtidos a partir de calos
Santos-Serejo, Janay Almeida dos;Aguiar-Perecin, Margarida L. R. de;
Scientia Agricola , 2000, DOI: 10.1590/S0103-90162000000400019
Abstract: as part of a breeding program to select tropical maize lines which are able to regenerate plants from embryogenic calli, three lines obtained from a flint maize variety, and their respective hybrids, have been investigated. short-term tissue cultures were obtained from immature embryos inoculated on n6 medium suplemented with 1.5 mg l-1 2,4-d and 12 mm l-proline. the frequency of 45 day-old embryogenic calli was similar to those of the best genotypes described in the literature (83-99%), reflecting the high quality of the genotypes evaluated to estabilish short-term tissue cultures. the average number of fertile regenerated plants in 2-3 month-old cultures ranged from 2 to 8.15 per callus, and the hybrids 13342/5 x 13342/2 and 132331/1 x 13342/5 showed the bestg performance. the results show that these genotypes may be used in programs involving plant transformation and genotype propagation.
Genótipos de milho com alta capacidade para embriogênese somática e regenera o de plantas obtidos a partir de calos
Santos-Serejo Janay Almeida dos,Aguiar-Perecin Margarida L. R. de
Scientia Agricola , 2000,
Abstract: Como parte de um programa que visa a sele o de linhagens adaptadas a regi es tropicais, com a capacidade para regenerar plantas a partir de calos embriogênicos de curta dura o, foram investigadas três linhagens obtidas a partir de uma variedade de milho tipo flint, e seus respectivos híbridos. As culturas foram obtidas a partir de embri es imaturos inoculados em meio N6 suplementado com 1,5 mg L-1 de 2,4-D e prolina 12 mM. A frequência de calos embriogênicos 45 dias após o início da cultura foi semelhante aos melhores genótipos descritos na literatura (83-99%), refletindo a alta qualidade dos genótipos testados para o estabelecimento de culturas de curta dura o. O número médio de plantas férteis regeneradas em culturas com 2-3 meses de idade variou de 2 a 8,15 por calo, destacando-se os híbridos 13342/5 x 13342/2 e 132331/1 x 13342/5. Os resultados mostram que estes genótipos s o promissores para utiliza o em programas envolvendo transforma o de plantas e propaga o de genótipos.
Efeito da semente de linha?a no crematócrito do leite de ratas e sua contribui??o no crescimento corporal dos filhotes
Leite, Carine Danielle Ferreira Costa;Vicente, Gabriela Camara;Suzuki, Akemi;Pereira, Aline D'Avila;Boaventura, Gilson Teles;Santos, Ronald Marques dos;Velarde, Luis Guillermo Coca;
Jornal de Pediatria , 2012, DOI: 10.2223/JPED.2168
Abstract: objectives: to assess the effect of flaxseed on rat milk creamatocrit and its contribution to offspring weight gain during lactation. methods: the study was conducted with 22 lister hooded rats divided into two groups: control group (cg, n = 11), which received a casein-based diet with 17% protein, and flaxseed group (fg, n = 11), which received a 25% flaxseed diet supplemented with 14% casein, totaling 17% protein. food consumption was controlled per individual cage and litter size. maternal milk creamatocrit and offspring weight variation until weaning age were also evaluated. results: fg was similar to cg concerning food intake (fg = 76.46±31.87 g; cg = 76.7±33.36 g; p = 0.9613) and equivalent to cg concerning litter size (fg = 4.94±2.34; cg = 5.5±3.19; p = 0.435). the same was found for milk fat content (fg = 18.4±4.76; cg = 15.3±6.03; p = 0.204) and total energy value (fg = 212.92±46.4; cg = 181.1±60; p = 0.1964). fg was similar to cg both in offspring body weight at weaning (fg = 37±6.96 g; cg = 32.6±7.5 g; p = 0.1817) and in weight gain (fg = 31.8±7.0 g; cg = 27.7±7.5 g; p = 0.2104). conclusion: a total of 25% flaxseed promoted an adequate offspring growth.
Primeiro registro de Nyssomyia yuilli yuilli (Young & Porter) e de Trichopygomyia longispina (Mangabeira) (Diptera: Psychodidae) no estado do Espírito Santo, Brasil
Pinto, Israel de Souza;Pires, Jeferson Gon?alves;Santos, Claudiney Biral dos;Virgens, Thieres Marassati das;Leite, Gustavo Rocha;Ferreira, Adelson Luis;Falqueto, Aloísio;
Biota Neotropica , 2008, DOI: 10.1590/S1676-06032008000100024
Abstract: the phlebotomine sand flies nyssomyia yuilli yuilli (young & porter) (diptera: psychodidae) and trichopygomyia longispina (mangabeira) (diptera: psychodidae) are recorded in the state of espírito santo, brazil for the first time.
Common beans (Phaseolus vulgaris L.) in the rations for cattle in feedlot  [PDF]
Rafael Henrique de Tonissi e Buschinelli de Goes, Karl Whays Klein, Luis Henrique Martinhago, Euclides Reuter de Oliveira, Kelly Cristina da Silva Brabes, Maria Gizelma de Menezes Gressler, Mayara Mitiko Yoshiraha, Raquel Tenório de Oliveira, Etelvitor Martins Leite dos Santos
Agricultural Sciences (AS) , 2013, DOI: 10.4236/as.2013.412106
Abstract:

To evaluate the inclusion of common beans in the diet of cattle in feedlot on characteristics of productive performance, nutrient digestibility and ruminal fermentation parameters, 15 bulls crossed were used in a completely randomized design. The animals were confined for 64 days, and 21 days of adaptation. We evaluated the inclusion common beans at levels of 0%, 13% and 26%. All diets were isocaloric and isonitrogenous with a 45:55 forage: concentrate ratio. The addition of beans in the diet did not affect animal performance, dry matter intake and feed efficiency. Inclusion bean changed the nutrient digestibility of DM, CP, EE, TC and OM, where the best digestibility was observed with the inclusion 13% and the lowest concentration of ruminal NH3-N. The general behavior of ruminal pH in relation to levels of inclusion of beans was 6.2. The inclusion of up to 13% of beans in the diet of feedlot cattle did not alter the apparent digestibility, ruminal and animal performance.

Chloroquine Treatment Enhances Regulatory T Cells and Reduces the Severity of Experimental Autoimmune Encephalomyelitis
Rodolfo Thomé, Adriel S. Moraes, André Luis Bombeiro, Alessandro dos Santos Farias, Carolina Francelin, Thiago Alves da Costa, Rosária Di Gangi, Leonilda Maria Barbosa dos Santos, Alexandre Leite Rodrigues de Oliveira, Liana Verinaud
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0065913
Abstract: Background The modulation of inflammatory processes is a necessary step, mostly orchestrated by regulatory T (Treg) cells and suppressive Dendritic Cells (DCs), to prevent the development of deleterious responses and autoimmune diseases. Therapies that focused on adoptive transfer of Treg cells or their expansion in vivo achieved great success in controlling inflammation in several experimental models. Chloroquine (CQ), an anti-malarial drug, was shown to reduce inflammation, although the mechanisms are still obscure. In this context, we aimed to access whether chloroquine treatment alters the frequency of Treg cells and DCs in normal mice. In addition, the effects of the prophylactic and therapeutic treatment with CQ on Experimental Autoimmune Encephalomyelitis (EAE), an experimental model for human Multiple Sclerosis, was investigated as well. Methodology/Principal Findings EAE was induced in C57BL/6 mice by immunization with myelin oligodendrocyte glycoprotein (MOG35–55) peptide. C57BL/6 mice were intraperitoneally treated with chloroquine. Results show that the CQ treatment provoked an increase in Treg cells frequency as well as a decrease in DCs. We next evaluated whether prophylactic CQ administration is capable of reducing the clinical and histopathological signs of EAE. Our results demonstrated that CQ-treated mice developed mild EAE compared to controls that was associated with lower infiltration of inflammatory cells in the central nervous system CNS) and increased frequency of Treg cells. Also, proliferation of MOG35–55-reactive T cells was significantly inhibited by chloroquine treatment. Similar results were observed when chloroquine was administrated after disease onset. Conclusion We show for the first time that CQ treatment promotes the expansion of Treg cells, corroborating previous reports indicating that chloroquine has immunomodulatory properties. Our results also show that CQ treatment suppress the inflammation in the CNS of EAE-inflicted mice, both in prophylactic and therapeutic approaches. We hypothesized that the increased number of regulatory T cells induced by the CQ treatment is involved in the reduction of the clinical signs of EAE.
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