Head Losses
Mostrando 25-36 de 38 artigos, teses e dissertações.
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25. Biofilter efficiencies in the purification and deodorization of hydrogen sulfide emissions / Desempenho de filtro biológico na depuração e desodorização de emissões de sulfeto de hidrogênio
Traditionally the industrial waste gases have been treated by physical-chemical processes, such as scrubbers, absorption, condensation and oxidation. Although these techniques presented great efficiency, the need to add chemical products and the replacement of adsorbent results in relatively high operational costs compared to biological treatment techniques.
Publicado em: 2007
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26. Optimal dispatch of generating units in hydroelectric systems by heuristic based on langrangean relaxation and dynamic programming / Despacho otimo de unidades geradoras em sistemas hidreletricos via heuristica baseada em relaxação lagrangeana e programação dinamica
The daily scheduling operation of the electrical energy system has by target to find the dispatch generation to the next day which must be compatible with the daily generation target defined by the energy planning models and to be an operational guide. Because of its proximity with the real time operation the modeling must represent the main characteristic o
Publicado em: 2006
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27. Estudo do acondicionamento de cafe torrado e moido em sistemas unitizados. / Study of the packing of roasted and ground coffee in unity system.
An alternative system to the packing of roasted and ground coffee was developed, using pression in the three different levels, 3t (P3), 6t (P6) e 9t (P9) to obtain 50g blocks. The objective of this study was obtain a safe and useful product comparing to the traditional system. The effect of the grind fine (M3), medium (M5) and coarse (M7) and press was deter
Publicado em: 2005
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28. Calibração de modelos de redes de distribuição de água para abastecimento considerando vazamentos e demandas dirigidas pela pressão / Water distribution network calibration model considering leakage and head-driven demands
Brazils water distribution systems usually present a high percentage of so-called physical losses, of which a significant portion is caused by leakage. Therefore, it is of fundamental importance, not only from the financial standpoint in terms of the pumped and chemically treated water but also particularly from that of the preservation of this natur
Publicado em: 2003
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29. Longissimus dorsi muscle quality characteristics from Bos indicus animals vitamin D3 treated. / Características qualitativas de músculo Longissimus dorsi de animais Bos indicus tratados com vitamina D3.
Among several techniques to improve beef tenderness, vitamin D3 (important to calcium mobilization) become, recently, to be used to actives the intracellular calcium-dependent proteases (m- and m-calpain). Ten days prior to slaughter 36 intact males were fed with 0, 3, 6 and 9 million IU of supplemental vitamin D3 per head per day. After that period, the ani
Publicado em: 2002
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30. Two-Phase (Solid-Liquid) Flow in Inclined Pipes
This paper presents an experimental research about the behavior of two-phase flows in inclined pipes. The inclination angle varied from 5° to 45° and the slurry solid concentration varied up to 15%. It was concluded that the head losses of the downward sloping pipe flow are always lower than the head losses of the horizontal flow and these are always lower
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
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31. FHIT gene alterations in head and neck squamous cell carcinomas.
To determine whether the FHIT gene at 3p14.2 is altered in head and neck squamous cell carcinomas (HNSCC), we examined 26 HNSCC cell lines for deletions within the FHIT locus by Southern analysis, for allelic losses of specific exons FHIT by fluorescence in situ hybridization (FISH) and for integrity of FHIT transcripts. Three cell lines exhibited homozygous
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32. Neuropsychological and psychosocial consequences of minor head injury.
Twenty subjects with minor head injury were compared to an uninjured group at 1 and 12 months after injury on a battery of neuropsychological and psychosocial measures. The results indicate that single minor head injury in persons with no prior compromising condition is associated with mild but probably clinically non-significant difficulties at 1 month afte
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33. Chromosome 3p loss of heterozygosity and mutation analysis of the FHIT and beta-cat genes in squamous cell carcinoma of the head and neck.
AIMS: To study the loss of heterozygosity at the short arm of chromosome 3 in primary tumours from patients with squamous cell carcinoma of the head and neck; to determine whether the FHIT gene, mapped to 3p14.2 and the CTNNB1 (beta-cat) gene, mapped to 3p21, are deleted or mutated in these tumours. METHODS: DNA was extracted from fresh tumours. Loss of hete
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34. Skin to skin care:heat balance.
Skin to skin care has been practised in primitive and high technology cultures for body temperature preservation in neonates. Regional skin temperature and heat flow was measured in moderately hypothermic term neonates to quantitate the heat transfer occurring during one hour of skin to skin care. Nine healthy newborns with a mean rectal temperature of 36.3
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35. Plasticity in the neural coding of auditory space in the mammalian brain
Sound localization relies on the neural processing of monaural and binaural spatial cues that arise from the way sounds interact with the head and external ears. Neurophysiological studies of animals raised with abnormal sensory inputs show that the map of auditory space in the superior colliculus is shaped during development by both auditory and visual
The National Academy of Sciences.
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36. A bovine virus diarrhea calfhood vaccination trial in a persistently infected herd: effects on titres, health and growth.
A controlled calfhood vaccination trial to prevent bovine virus diarrhea was conducted in a 100 head cow-calf operation with a three year history of annual calf losses due to enteric bovine virus diarrhea (persistently infected herd). Approximately 50% of the calves were vaccinated at six, 12 and 24 weeks of age. Paired serum samples and growth data were col