Influência do etil-trinexapac no acúmulo, na distribuição de nitrogênio (15N) e na massa de grãos de arroz de terras altas

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

Diagnóstico de descarga de cátodo oco de ar e pós-descarga Ar N2 por espectroscopia de emissão óptica e espectrometria de massa

Many applications require that the plasma discharge is produced apart from the surface to be processed, thus preventing damage caused by bombardment and/or plasma radiation. In the post-discharge regime in various applications thermally sensitive materials can be used. In this work, active species produced by discharge and post-discharge hollow cathode were diagnosed by optical emission spectroscopy and mass spectrometry. The discharge was produced with the gases Ar and Ar - N2 gas flow ranging from 1 to 6 cm3/min and electric current between 150 to 600 mA. It was estimated that the ion density inside the hollow cathode, with 2 mm diameter ranged between 7.71 and 14.1 x 1015 cm-3. It was observed that the gas flow and the electric current changes the emission intensity of Ar and N2 species. The major ionic species detected by quadrupole mass spectrometry were Ar+ and N2+. The ratio of optical emission intensities of N2(1 +)/Ar(811 nm) was related to the partial pressure of N2 after the hollow cathode discharge at low pressure

Modelagem da transferência de massa na remoção do óleo da água produzida por flotação em coluna com uso de tensoativos de origem vegetal

The treatment of oil produced water and its implications are continually under investigation and several questions are related to this subject. In the Northeast Region Brazil, the onshore reservoirs are, in its majority, mature oil fields with high production of water. As this oil produced water has high levels of oil, it cannot be directly discarded into the environment because it represents a risk for contamination of soil, water, and groundwater, or even may cause harm to living bodies. Currently, polyelectrolytes that promote the coalescence of the oil droplets are used to remove the dispersed oil phase, enhancing the effectiveness of the flotation process. The non-biodegradability and high cost of polyelectrolytes are limiting factors for its application. On this context, it is necessary to develop studies for the search of more environmentally friendly products to apply in the flotation process. In this work it is proposed the modeling of the flotation process, in a glass column, using surfactants derived from vegetal oils to replace the polyelectrolytes, as well as to obtain a model that represents the experimental data. In addition, it was made a comparative study between the models described in the literature and the one developed in this research. The obtained results showed that the developed model presented high correlation coefficients when fitting the experimental data (R2 > 0.98), thus proving its efficiency in modeling the experimental data.

Comparação entre métodos para determinação de carbono orgânico em amostras de solo mensuradas por volume ou massa

O uso da massa (g) ou do volume (cm³) como medida da quantidade de solo para determinação do teor de C orgânico do solo (COS), bem como a utilização de diferentes métodos de determinações analíticas empregados para essa mesma finalidade, pode alterar diretamente a interpretação dos resultados. Este trabalho teve como objetivo comparar os métodos colorimétricos e titulométricos de determinação de matéria orgânica em três solos com diferentes texturas, tomando-se as amostras por massa (pesagem) e por volume (cachimbagem). Houve variação no teor de COS entre os métodos estudados para um mesmo solo. O uso da massa e do volume alterou diretamente a interpretação dos teores de matéria orgânica no solo. Há variações nos métodos de determinação de COS entre solos de diferentes texturas.

Rendimento de massa de matéria seca e relação c/n da aveia preta em função do lodo de esgoto e adubação nitrogenada

The final display of sewage sludge has been characterized as one of the most relevant environmental problems in the cities; it daily increases in both developed and developing countries, resulting in larger collection networks and increased treatment levels. The aim of this study was to verify the effect of mineral N and sewage sludge on dry matter yield and C/N ratio in black oat. The experiment was conducted in Sao Manuel Experimental Farm, belonging to the Faculty Agronomic Sciences, Unesp, Botucatu. The adopted experimental design was in randomized blocks constituted of 6 treatments and 5 replicates, as follows: T0 - without nitrogen fertilization; T1 - 70 kg ha(-1) of the N mineral; T2 - 35 kg ha(-1) of the N from sewage sludge and 35 kg ha(-1) of the N in the mineral form; T3 - 70 kg ha(-1) of the N from sewage sludge; T4 - 105 kg ha(-1) of the N from sewage sludge;- T5 - 140 kg ha(-1) of the N from sewage sludge. The parameters evaluated were dry matter acumulation and C/N ratio; with collections made at 60, 75, 90, 105 and 120 days after sowing. Increasing the dose of sewage sludge provided increment in dry matter yield in oat. The N provided a lawoer C/N ratio in plant oats.

Incorporação de lodo de esgoto na massa cerâmica para fabricação de tijolos maciços: uma alternativa para a disposição final de resíduo

The disposal of sewage sludge is a growing problem face up to management of sanitary sevices. Otherwise, because its making process characteristic, the Ceramic Industry can tolerate the presence of this wastes as raw material. This study has as object to confirm the use of the sewage sluge in the Ceramic Industry like a sustentable alternative for its disposal. Futhermore, this study quests to evaluate the maximum proportion for incorporation of sludge wich result in technically and enviromentally suitable bricks. For found this proportion, the research consisted of (1) making of bricks in full scale, adde up 0%, 5%,10%, 15%, 20%, 25%,30%, 35% e 40% sludge, with size 220x105x45 mm, hand-molded by rammer and baked by industrial kiln; and (2) tecnical and enviromental evaluation of this bricks, according to Brazilian norms. The raw material uses were two distinct clays come from Goianinha/RN and sewage comes from a septic system tank and pumped into tank vehicle, of Natal/RN. The technical evaluation allowed to conclude the addiotion of the sludge brings about signifcant lost of mass and the water absorption grew up according to increase of sludge: every sludge-amended clay bricks absorved more water than control group. Thus, the compressive strength was signicantly decreased because the increase of sludge: bricks with 5% sludge added lost 45% of strength achieved at control group; the bricks made with 10 and 20% lost almost 70% of bigger strength. With up to 25% sludge added to the bricks, the streght decreased over 90%. Concerning heavy metal leaching, the two maximum proportion wich have tecnical approval, it means bricks sludge added with 15 and 20%, can say there is no risk of enviromental contamination using those bricks. This way, in this work context, it can to conclude the maximum proportion atends the technical and enviromental criterion is 20%

Análise da adição de resíduo oriundo do tratamento de esgotos em massa cerâmica utilizada para fabricação de telhas

Sludge of Wastewater Treatment Plants (WTPs) disposal is a problem for any municipality, for this reason the amount of sludge production is now a key issue in selecting treatment methods. It is necessary to investigate new applications for this waste type, due to the restrictions imposed by the environmental organs. The raw materials used in the Red Ceramic, are generally very heterogeneous, for this reason, such materials can tolerate the presence of different types of wastes. In Rio Grande do Norte, the roof tiles production corresponds to 60,61% from the total of ceramic units produced. Due to the importance of the ceramic industry of roof tiles for the state, allied to the environmental problem of the sludge disposal, this work had for objective to verify the possibility of the incorporation of sewage sludge in ceramic body used for production of roof tiles. In the research, sludge originating from drying beds of WTP of the Central Campus from UFRN and clays originating from a ceramic industry from Goianinha/RN were used. The raw materials were characterized by techniques of: analysis of particles distribution by diffraction to laser; real density; consistence limits; chemical analysis by X-ray fluorescence; mineralogical analysis by X-ray diffraction; organic matter; and solids content. Five batches of roof tiles were manufactured in the approximate dosages of 2%, 4%, 6%, 8% and 10%. To evaluate the properties of each final product, tests of water absorption, impermeability, bending strength, leachability and solubility were accomplished. The roof tiles manufactured with sludge presented characteristics similar to the roof tiles without sludge in relation to the environmental risk. The results showed that it is possible to use approximately up to 4% of sludge in ceramic bodies for production of roof tiles. However, it is observed that the high amount of organic matter (71%) present in the sludge is shown as factor that limits the sludge incorporation in ceramic bodies, worsening the quality of the roof tiles. It is necessary the use of mixtures of different raw materials under point of view of the granulometry and of the other chemical and mineralogical properties for the obtaining of a satisfactory mass to the production of ceramic roof tiles

Um estudo sobre a interação estrela-planeta a partir da relação massa-período planetário com a atividade estelar

n this work, we analyze the behavior of the chromospheric and coronal activities as a function of the mass and the orbital period of extrasolar planets which were detected by transit technique. So we look for possible effects of the planet on the star s chromosphere and corona. For this study we selected a sample of 48 stars with chromospheric activity indicator and 23 with coronal activity indicator. Our work is based on the work from Pont et al. (2011) in order to study stars with planets which were obtained by transit technique. Furthermore, we studied the relationship between planetary mass and orbital period with the chromospheric and coronal activity in order to better understand which influences the planets cause in the outer layers of stellar atmosphere. In our analysis we can observe that the mass of the planets exerts no influence in the stellar activity. However, we observed that the stellar coronal and chromospheric activities decrease with the increase of the orbital period of the planet

Um estudo sobre a interação estrela-planeta a partirda relação massa-período planetário com a atividade estelar

In this work, we analyze the behavior of the chromospheric and coronal activities as a function of the mass and the orbital period of extrasolar planets which were detected by transit technique. So we look for possible effects of the planet on the star s chromosphere and corona. For this study we selected a sample of 48 stars with chromospheric activity indicator and 23 with coronal activity indicator. Our work is based on the work from Pont et al. (2011) in order to study stars with planets which were obtained by transit technique. Furthermore, we studied the relationship between planetary mass and orbital period with the chromospheric and coronal activity in order to better understand which influences the planets cause in the outer layers of stellar atmosphere. In our analysis we can observe that the mass of the planets exerts no influence in the stellar activity. However, we observed that the stellar coronal and chromospheric activities decrease with the increase of the orbital period of the planet

Efeitos da irrigação e adubação nitrogenada sobre a massa de forragem de cultivares de Panicum maximum Jacq.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Produtividade de grãos de milho e massa seca de braquiárias em consórcio no sistema de integração lavoura-pecuária

Objetivou-se avaliar as produtividades de grãos de milho e massa seca de braquiárias em duas modalidades de consórcio em sistema de integração lavoura-pecuária no período de inverno-primavera em região do Cerrado. O experimento foi conduzido no ano de 2006, na Fazenda de Ensino, Pesquisa e Extensão (FEPE), pertencente à Faculdade de Engenharia (FE/UNESP - Campus de Ilha Solteira), localizada no município de Selvíria, MS. O delineamento experimental utilizado foi de blocos casualizados, em esquema fatorial 4x2, com cinco repetições. Os tratamentos constituíram-se de quatro espécies de braquiárias (Brachiaria brizantha cv. 'Marandu', Brachiaria decumbens, Brachiaria ruziziensis e Brachiaria híbrido cv. 'Mulato II') consorciadas na linha e a lanço no momento da semeadura do milho. Avaliaram-se os componentes da produção, a produtividade do milho, bem como a massa seca das braquiárias após a colheita do milho. As forrageiras consorciadas a lanço, com destaque para a Brachiaria ruziziensis proporcionaram menor desenvolvimento das plantas de milho e menores valores dos componentes da produção, bem como da produtividade de grãos. Apesar de satisfatórias produtividades de massa seca (acima de 2.500kg ha-1), com exceção da Brachiaria brizantha, as demais espécies consorciadas a lanço foram superiores, com destaque para a Brachiaria decumbens e a Brachiaria ruziziensis que apresentaram maior adaptabilidade e produtividade de forragem no consórcio com milho em sistema de integração lavoura-pecuária.

Influência da densidade de carga e da massa molar da poliacrilamida na reologia de sistemas microemulsionados

The knowledge of the rheological behavior of microemulsionated systems (SME) is of fundamental importance due to the diversity of industrial applications of these systems. This dissertation presents the rheological behavior of the microemulsionated system formed by RNX 95/alcohol isopropyl/p-toulen sodium sulfonate/kerosene/distilled water with the addition of polyacrylamide polymer. It was chosen three polymers of the polyacrylamide type, which differ in molar weight and charge density. It was studied the addition of these polymers in relatively small concentration 0,1% in mass and maximum concentration of 2,0%. It was made analysis of flow to determine the appearing viscosities of the SME and rheological parameters applying Bingham, Ostwald de Waale and Herschell-Buckley models. The behavior into saline environment of this system was studied for a solution of KCl 2,0%, replacing the distilled water. It was determined the behavior of microemulsions in relation with the temperature through curves of flow in temperatures of 25 to 60ºC in variations of 5ºC. After the analysis of the results the microemulsion without the addition of polymer presented a slight increase in its viscosity, but it does not mischaracterize it as a Newtonian fluid. However the additive systems when analyzed with low concentration of polymer adjusted well to the applied models, with a very close behavior of microemulsion. The higher concentration of the polymer gave the systems a behavior of plastic fluid. The results of the temperature variation point to an increase of viscosity in the systems that can be related to structural changes in the micelles formed in the own microemulsion without the addition of polymer

Bolton freeware: aplicativo de avaliação de discrepância de massa dentária desenvolvido pelo programa de pós-graduação em odontologia/UFRN

The calculation of tooth mass discrepancy, essential for good planning and a proper orthodontic finishing, when performed manually, besides being laborious, requires considerable time consumption. The aim of this study was to develop and test Bolton Freeware, a software for analysis of the tooth mass discrepancy of Bolton, aiming to minimize the consumption of time in a less onerous way. The digital analysis of the software was done by means of two-dimensional scanning of plaster study models and compared to manual evaluation (gold standard), using 75 pairs of stone plaster study models divided into two groups according to the magnitude of the Curve of Spee (group I from 0 to 2 mm, group II greater than 2 to 3mm). All the models had permanent dentition and were in perfect condition. The manual evaluation was performed with a digital caliper and a calculator, and the time required to perform the analysis for both methods was recorded and compared. In addition, the software was evaluated by orthodontists regarding its use, by means of questionnaires developed specifically for this purpose. Calibration was performed prior to manual analysis, and excellent levels of inter-rater agreement were achieved, with ICC > 0.75 and r > 0.9 for total and anterior proportion. It was observed in the evaluation of error of the digital method that some teeth showed a significant systematic error, being the highest measured at 0.08 mm. The analysis of total tooth mass discrepancy performed by Bolton Freeware, for those cases in which the curve of Spee is mild and moderate, differ from manual analysis, on average, 0.09 mm and 0.07 mm respectively, for each tooth evaluated, with r> 0, 8 for total and anterior proportion. According to the specificity and sensitivity test, Bolton Freeware has an improved ability to detect true negatives, i.e. the presence of discrepancy. The Bolton analysis digitally performed was faster, with an average difference of time consumed to perform the analysis of Bolton between the two methods of approximately 6 minutes. Most experts interviewed (93%) approved the usability of the software

Reavaliação da via aérea do paciente obeso submetido à cirurgia bariátrica após a redução do índice de massa corpórea

JUSTIFICATIVA E OBJETIVOS: A dificuldade na intubação traqueal é causa de mortalidade em anestesiologia e pode estar relacionada à obesidade. Diagnosticar uma intubação difícil contribui para o êxito da abordagem da via aérea, mas os parâmetros preditores de intubação difícil não estão bem estabelecidos. A classificação de Mallampati, a distância interincisivos, a circunferência do pescoço, a distância tireomentoniana e a presença da síndrome da apneia obstrutiva do sono são parâmetros que podem indicar uma intubação difícil. O tratamento cirúrgico da obesidade proporciona redução do índice de massa corpórea (IMC), com estabilização por volta de 2 anos. O objetivo desta pesquisa foi reavaliar os parâmetros descritos com os valores pré-cirúrgicos. MÉTODO: Cinquenta e um pacientes de ambos os sexos foram avaliados no período pré-operatório quanto a IMC, classificação de Mallampati, circunferência do pescoço, distância interincisivos, distância tireomentoniana e grau da síndrome de apneia obstrutiva do sono por meio da polissonografia. Após dois anos de cirurgia e redução do IMC < 35 kg.m-2, os preditores de intubação difícil foram reavaliados por outro médico anestesiologista com conhecimento do IMC prévio. Foram excluídos nove pacientes. Executou-se reavaliação dos parâmetros supracitados e, para os que não realizaram nova polissonografia, aplicou-se a escala de sonolência de Epiworth. RESULTADOS: Quarenta e dois pacientes foram reavaliados e mostraram redução do IMC e da circunferência do pescoço e aumento das distâncias interincisivos e tireomentoniana. Apenas um paciente apresentou redução na escala de Mallampati e somente quatro realizaram a polissonografia. CONCLUSÕES: A redução do IMC proporciona aumento das distâncias interincisivos e tireomentoniana e redução da circunferência do pescoço. O Mallampati permanece inalterado.

Avaliação do tempo de trânsito esofágico pelo ultrassom: influência do gênero e índice de massa corpórea

OBJETIVO: Utilizar a ultrassonografia do esôfago intra-abdominal para avaliar o tempo de trânsito esofágico para água e iogurte, em posição ortostática, e avaliar a influência do gênero e índice de massa corpórea. MATERIAIS E MÉTODOS: Foram estudados 89 indivíduos adultos jovens, sem clínica de doenças do trato gastrintestinal superior, sendo 40 do gênero feminino (média de 20,13 ± 1,62 anos) e 49 do gênero masculino (média de 20,43 ± 2,17 anos). O tempo de trânsito esofágico foi cronometrado, com o paciente em posição ortostática, durante a deglutição de água e iogurte. RESULTADOS: O tempo de trânsito esofágico para as mulheres e para os homens foi, respectivamente: para água, de 5,84 ± 1,60 segundos versus 6,66 ± 1,68 segundos, e para iogurte, de 9,12 ± 1,96 segundos versus 9,28 ± 1,70 segundos. Não se constatou diferença entre os gêneros masculino e feminino, apesar de o fator índice de massa corpórea ser menor nas mulheres. CONCLUSÃO: Os dados obtidos do tempo de trânsito esofágico para alimento líquido (água) e pastoso (iogurte), em posição ortostática, em adultos jovens não mostraram diferença entre os gêneros, mesmos nas mulheres com índice de massa corpórea menor em relação aos homens.