Encontrados 14 documentos, a visualizar página 1 de 2
Effect of Sequencing Batch Cycle Strategy on the Treatment of a Simulated Texti...
Mata, A. M. T.; Pinheiro, H. M.; Lourenço, N. D.Com o apoio RAADRI. ; Aerobic granular sludge was successfully developed on a simulated textile effluent with an added azo dye, with better results than in dye-free control. The overall performance of the treatment was very good, with high color and COD removal yields (up to 85% and 80%, respectively). Operation under two sequencing batch cycle strategies, i.e., with a single anaerobic/aerobic reaction phase o...
Quantification of epigenetic and genetic 2nd hits in CDH1 during hereditary dif...
Oliveira, C; Sousa, S; Pinheiro, H; Karam, R; Bordeira-Carriço, R; Senz, J; Kaurah, P; Carvalho, J; Pereira, R; Gusmão, L; Wen, X; Cipriano, MABACKGROUND & AIMS: Hereditary diffuse gastric cancer (HDGC) families carry CDH1 heterozygous germline mutations; their tumors acquire complete CDH1 inactivation through "2nd-hit" mechanisms. Most frequently, this occurs via promoter hypermethylation (epigenetic modification), and less frequently via CDH1 mutations and loss of heterozygosity (LOH). We quantified the different 2nd hits in CDH1 occurring in neopla...
Comparative study of the influence of minerals in gas sorption isotherms of thr...
Rodrigues, C.; Pinheiro, H. J.; Lemos de Sousa, M. J.This investigation compares the gas adsorption behaviour and capacity of three bituminous coals from South Africa, of similar rank, by assessing the characteristics of the raw coal, as well as the resulting float and sink fractions (at 1.80 cm3/g) obtained by density separation of crushed coal samples. Calculations were also made to obtain the raw coal gas storage capacity from the weighted contribution of both...
Contribution of CD4+ T cells to the early mechanisms of ischemia- reperfusion i...
Pinheiro,H.S.; Camara,N.O.S.; Noronha,I.L.; Maugeri,I.L.; Franco,M.F.; Medina,J.O.A.P.; Pacheco-Silva,A.Renal ischemia-reperfusion (IR) injury is the major cause of acute renal failure in native and transplanted kidneys. Mononuclear leukocytes have been reported in renal tissue as part of the innate and adaptive responses triggered by IR. We investigated the participation of CD4+ T lymphocytes in the pathogenesis of renal IR injury. Male mice (C57BL/6, 8 to 12 weeks old) were submitted to 45 min of ischemia by re...
An imroved design for ZVT DC-DC PWM converters with snubber assisted auxiliary ...
Russi,J.; Martins,M. L.; Gründling,H. A.; Pinheiro,H.; Pinheiro,J. R.; Hey,H. L.This paper proposes an improved design to calculate the snubber auxiliary elements of ZVT DC-DC PWM converters with snubber assisted auxiliary switch. The proposed improved design guidelines are based on the reduction of the conduction losses through the auxiliary circuit. It is accomplished by the unique location of the turn-off snubber capacitor, which is shared by both active switches. By means of this impro...
A new ZCZVT commutation cell for PWM DC-AC converters
Stein,C. M. de O.; Hey,H. L.; Pinheiro,J. R.; Pinheiro,H.; Gründling,H. A.This paper proposes a new auxiliary commutation cell for PWM inverters that allows the main switches to be turned on and off at zero voltage and zero current. The main switches zero current turn-on reduces the undesired effects of parasitic inductances related to the circuit layout. The main diodes reverse recovery losses are minimized since di/dt and dv/dt are controlled. The ZCZVT commutation cell is located ...
A family of improved ZVT PWM converters using an auxiliary resonant source
Martins,M. L.; Pinheiro,H.; Pinheiro,J. R.; Gründling,H. A.; Hey,H. L.This paper presents a novel family of Zero Voltage Transition (ZVT) DC-DC PWM Converters that uses a resonant circuit as auxiliary commutation source to control the current through the auxiliary switch without additional current stresses on main devices. The improved ZVT commutation cell enables the main switch to be turned on and off at Zero Voltage Switching (ZVS) and the auxiliary switch to be turned on and ...
Prerequisites, general criteria and primary studies required in the CoalbedMeth...
Lemos de Sousa, M. J.; Pinheiro, H. J.; Rodrigues, C.The main objectives of this paper are: (i) to review and summarize current concepts of Coalbed Methane (CBM) genesis and storage, (ii) to highlight and present the principal procedures and methodologies concerned with prospecting/exploring of CBM leading to a sequence of basic criteria to be followed at an early stage and, subsequently, during research and exploration, and (iii) to present a list of the most im...
Prospecting for coalbed methane: preliminary investigation into the possibiliti...
Lemos de Sousa, M. J.; Pinheiro, H. J.The fundamental objetive of this study resides in investigating the potential suitability of spanish coalfields to prospecting natural gas from coal in-situ (Coalbed Methane-CBM). The study was based not only on a literature survey and supplemented by onsite visits and investigations, but also on inhouse research activities. Tree selecting criteria have been defined: 1.1. Existing resources: a figure of 20MT of...
Source rock/dispersed organic matter characterization-TSOP research subcommitee...
Teerman, S. C.; Cardott, B. J.; Harding, R. W.; Lemos de Sousa, M. J.; Logan, D. R.; Pinheiro, H. J.; Reinhardt, M.; Thompson-Rizer, C. L.; Woods, R. A.Because sedimentary organic matter consists of a diverse mixture of organic components with different properties, a combination of chemical and petrographic results offers the most complete assessment of source rock properties. The primary purpose of this Society for Organic Petrology (TSOP) subcommittee is to contribute to the standardization of kerogen characterization methods. Specific objectives include: (1...
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