First measurement of the cross section for top-quark pair production in proton-proton collisions at root s=7 TeV

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Measurements of differential cross sections of Z/gamma* plus jets plus X events in p(p)over-bar collisions at root s=1.96 TeV

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Bisphenol A removal from wastewater using self-organized TIO2 nanotubular array electrodes

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Simultaneous removal of chromium and leather dye from simulated tannery effluent by photoelectrochemistry

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Carbon nuclear magnetic resonance spectroscopic fingerprinting of commercial gasoline: Pattern-recognition analyses for screening quality control purposes

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Iron chelating-mediated antioxidant activity of Plectranthus barbatus extract on mitochondria

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Manutenção da qualidade e aumento da longevidade floral de crisântemo cv. White polaris

0 objetivo do trabalho foi determinar o melhor tratamento pós-colheita para manutenção floral e aumento da longevidade de crisântemo de maço do tipo pompom (Dendranthema grandiflorum (Ramat.) S. Kitamura) cv. White Polaris. Estabeleceu-se como ponto de colheita o momento em que as hastes apresentavam três inflorescências apicais com as pétalas externas em ângulo de 45° em relação à horizontal. Durante o ensaio em laboratório, as hastes, colhidas em estufa de produção comercial, após totalmente imersas em água de torneira, à sombra, durante três horas, foram cortadas sob água na base do caule entre 50 e 60 cm. As hastes foram distribuídas nos diferentes tratamentos de pulsing durante 24 horas, com luz contínua de 1.500 lux, 60 a 90% de umidade relativa do ar e temperatura ambiente de 25 ± 2°C. No primeiro experimento, testou-se a eficiência de 8-hidroxiquinolina (8-HQ) e tiabendazole (TBZ) como germicidas de manutenção da qualidade na solução de pulsing; testaram-se, também, dois reguladores de crescimento, a saber: ácido giberélico (GA3), 6-benzilaminopurina (6-BA) ou a mistura dos dois, com o objetivo de preservar a cor e a turgidez da folhagem. Os melhores resultados foram com 8-HQ (0,69 mol/m³) e GA3 (0,058 mo1/m³). No segundo experimento, avaliaram-se os seguintes inibidores de etileno: tiossulfato de prata (STS), nitrato de prata (AgNO3) e cloreto de cobalto (COC1(2)). A melhor resposta foi obtida com AgNO3 (2,9 e 4,4 mo1/m³).

A influência da redução do espaço nasofaringeano na morfologia facial de pré-adolescentes

A redução do espaço nasofaringeano devido à hipertrofia adenoideana leva a adaptações posturais da cabeça, mandíbula, língua e lábios, podendo causar alterações no padrão esquelético facial. Foram coletadas 98 teleradiografias em norma lateral de pré-adolescentes na faixa etária de 7 a 10 anos na Clínica de Ortodontia da F.O. Araraquara, as quais foram selecionadas levando-se em consideração a dimensão da imagem do espaço nasofaringeano (ENF) (correspondente à menor distância do dorso do palato mole à parede faringeana posterior). As radiografias foram divididas em 3 grupos: Grupo I (estreito), ENF entre 1,7 e 5,1mm; Grupo II (médio), ENF entre 5,2 e 7,6mm; Grupo III (amplo), ENF entre 7,7 e 12,9mm. Utilizamos duas medidas angulares e seis medidas lineares para caracterizar a morfologia facial. As médias e o desvio padrão de cada medida efetuada foram obtidas, e por meio de teste de análise de variância (ANOVA), verificou-se diferença não significativa entre os grupos para as variáveis: ANperp, p=0,07; PgNperp, p=0,058, comprimento mandibular, p=0,15, comprimento maxilar, p=0,06, diferença maxilomandibular, p=0,98, eixo facial, p=0,96, altura facial inferior, p=0,84 e significativa na variável plano mandibular (p<0,01). Portanto, a redução do espaço nasofaringeano está associada a alterações no plano mandibular, que apresentou valores maiores com a diminuição do espaço nasofaringeano.

Magnetic properties of Cu1+xMn2-xO4 and Ni1+xMn2-xO4 solid solutions

Magnetic properties of two spinel oxides solid solutions, Cul+xMn2-xO4 and Ni1+xMn2-xO4 are reported. These series are characterized by two magnetic transitions: the upper one, of ferrimagnetic type, occurs at about 85 K (for copper-based) and at 105-110 K (for nickel-based spinels), independently of the x-content: the lower transition may be related to a Neel-type collinear ordering and takes place at 30 and 45 K, respectively. Application of moderate fields (H > 250 Oe) make both transitions to merge into one broad maximum in the magnetization, which takes place at lower temperature when applying larger fields. Magnetization cycles with temperature (ZFC/FC) or field (loops) allowed us to well characterize the ordered state. The effective moment follows the expected behavior when manganese ions are being substituted by ions of lower magnetic moment (Ni(2+)andCU(2+)). (c) 2007 Elsevier Ltd. All rights reserved.

Angiogenesis and skin carcinomas with skull base invasion: A case-control study

Background. Some skin carcinomas may be very aggressive. Intensity of angiogenesis, measured by intratumoral vessel density using expression of CD34, has been associated with tumor aggressiveness. In this study, the expression of CD34 in basal cell carcinomas (BCCs) and squamous cell carcinomas (SCCs) with skull base invasion was compared with that in tumors with good outcome.Methods. Expression of CD34 was graded as mild, moderate, and intense, in 24 BCCs and 11 SCCs with skull base invasion. The control group included 23 BCCs and 10 SCCs.Results. Intense expression of CD34 was noted in 25.00% of BCCs with skull base invasion, compared with 4.35% in the control group (p =.058). Regarding SCCs, intense expression of CD34 was found in 54.55% of aggressive tumors, compared with 10.00% in the control group (p = 133).Conclusions. A trend toward denser microvascular angiogenesis was observed in both BCCs and SCCs with skull base invasion compared with less aggressive controls. (C) 2004 Wiley Periodicals, Inc.

Remarks on infrared dynamics in QED(3)

In this work we study how the infrared sector of the interaction Hamiltonian can affect the construction of the S-matrix operator of QED in (2+1) dimensions.

Morphology characterization of layer-by-layer films from PAH/MA-co-DR13: the role of film thickness

We report on the use of dynamic scale theory and fractal analyses in the Study of distinct growth stages of layer-by-layer (LBL) films of poly(allylamine hydrochloride) (PAH) and a side-chain-substituted azobenzene copolymer (Ma-co-DR13). The LBL films were adsorbed oil glass substrates and characterized with atomic force microscopy with the Ma-co-DR13 at the top layer. The ganular morphology exhibited by the films allowed the observation of the growth process inside and outside the grains. The growth outside the grains was found to follow the Kardar-Parisi-Zhang model, with fractal dimensions of ca. 2.6. One could expect that inside the grains the morphology would be close to a Euclidian surface with fractal dimension of ca. 2 for any growth stage. The latter, however, was observed only for thicker films containing more than 10 bilayers. For thinner films the morphology was well described by a self-affine fractal. Such dependence of the growth behavior with the film thickness is associated with a more complete coverage of adsorption sites in thicker films due to diffusion of polymer molecules. (c) 2004 Elsevier B.V. All rights reserved.

Degradation of metallophtalocyanine dye by combined processes of electrochemistry and photoelectrochemistry

Photoelectrocatalytic degradation of metallophtalocyanine reactive dye (turquoise blue 15) was performed using a Ti/TiO2 thin film photoanode prepared by sol-get method. Hundred percent of color removal and almost complete mineralization (95% at pH 2 and 85% at pH 8) where achieved after 6 h of photolectrocatalytic oxidation of 2.5 x 10(-5) mol L-1 AT15 dye in Na2SO4 mol L-1 under E = +1.2 V versus SCE. The method limitation occurs at dye concentration higher than 4 x 10-5 mol L-1, where the degradation rate becomes markedly slower. An important improvement in color removal and TOC reduction for 1 x 10(-3) mol L-1 metallophtalocyanine dye was achieved using a combined process. After 4 h of potential controlled electrolysis at -1.2 V on a cathode of platinum followed by 6 h of photoelectrocatalytic oxidation leads to 100% of color removal and 83% of TOC decay and eletrodeposition of 69% of the released copper originally presented as copperphtalocyanine complex, by electrodeposition on the cathode without any other treatment. (C) 2005 Elsevier Ltd. All rights reserved.

Temperature dependence on the electrical properties of Ba(Ti0.90Zr0.10)O-3:2V ceramics

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Optimization of Radial Basis Function neural network employed for prediction of surface roughness in hard turning process using Taguchi's orthogonal arrays

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)