380 research outputs found
Cork Boiling Wastewater Treatment in Pilot Constructed Wetlands
most studies published on the topic of cork boiling wastewater (CBW) treatment or valorization used physico-chemical treatment options rather than biological processes. However, the related costs are high and above those of the biological treatment alternative for wastewaters with similar organic loads but from different sources. Thus, con- structed wetland systems (CWs) can be an alternative to conventional biological treatment systems, namely to activated sludge systems, with the prominent virtues of low construction and operation costs. Until today, there is no study or research published for the treatment of CBW using CW systems. Thus, this investigation is a novelty and included the monitoring over a period of four years of the operation of a horizontal subsurface flow constructed wetland (HSF CW) microcosm-scale system planted with common reeds (Phragmites australis) and filled with light expanded clay aggregates (LECA), as support media for the plants and for biofilm development. The contribution of plants to the treatment was assessed by the comparison with an identical wetland unit without plantation (control bed). After this extended period of operation intended to maximize biomass development and acclimatization, which included stepwise increase of the organic load rate (OLR) up to 8.9 g COD/m2/d, the assessment of the treatment capacity of the system was done by doubling the OLR to 16.4 g COD/m2/d during 200 days.info:eu-repo/semantics/publishedVersio
Myocardial bridging: retrospective analysis and scintigraphic testing of patients with no angiographically significant atherosclerotic coronary disease.
Rev Port Cardiol. 2006 Apr;25(4):397-406.
Myocardial bridging: retrospective analysis and scintigraphic testing of patients with no angiographically significant atherosclerotic coronary disease.
[Article in English, Portuguese]
Luz A, Silveira J, Palma P, Carvalho HC, Albuquerque A, Amorim I, Gomes L.
SourceServiço de Cardiologia, Hospital Geral de Santo António, Porto, Portugal. [email protected]
Abstract
INTRODUCTION AND OBJECTIVE: The clinical relevance of myocardial bridging (MB) is a matter of debate. The objective of this work was to examine its prevalence, clinical presentation, prognosis, and functional features on scintigraphy in a group of patients with no significant atherosclerotic coronary disease.
METHODS: We retrospectively examined 7039 consecutive cardiac angiograms performed between January 1994 and December 2004, selecting cases in which MB was not accompanied by significant coronary disease (defined as luminal stenosis > 50%), valvular heart disease or cardiomyopathy. Patient characteristics such as age, gender, vascular risk factors and clinical presentation were recorded. We then contacted these patients by telephone to determine cardiovascular events since diagnosis (hospitalization, infarction, death) or symptoms of angina, and to invite them for myocardial perfusion scintigraphy (MPS) with stress testing.
RESULTS: The prevalence of MB was 0.97% (68 patients). The study population without significant coronary disease, valvular heart disease or cardiomyopathy was composed of 31 subjects, mean age 51.45 +/- 13.77 years, 94% (29 patients) male. Clinical presentations were: non-ST elevation acute coronary syndromes with or without biomarkers of necrosis 34% (14 patients), stable angina 23% (7 patients), atypical chest pain 16% (5 patients), ST-elevation myocardial infarction 13% (4 patients), other 3% (1 patient). Left ventricular function was normal in all patients, and angiography showed MB of the left anterior descending artery, 63% (19 patients) in the mid portion, and 33% (12 patients) in the distal portion. All subjects were treated medically. We were able to contact 24 (77%) of the 31 patients, all of whom underwent MPS; mean time since angiography was 61.25 months, with no cardiovascular events (hospitalization, infarction, death) or symptomatic angina. MPS only identified three patients with findings consistent with anterior wall ischemia.
CONCLUSIONS: In this series, 58% of the patients with MB and no significant atherosclerotic coronary disease presented with acute coronary syndromes. In all the subjects contacted, the prognosis had been good during the time since diagnosis. In the majority of them, no signs of ischemia were detected on MPS.
PMID: 16869205 [PubMed - indexed for MEDLINE
II Ciclo de ConferĂȘncias : Conselho TĂ©cnico-CientĂfico: temas atuais em investigação
A obra Ă© constituĂda pelos resumos das comunicaçÔes apresentadas pelos docentes da Escola Superior AgrĂĄria do Instituto PolitĂ©cnico de Castelo Branco e sĂŁo referentes aos projetos de investigação nos quais estĂŁo envolvidos.O atual Conselho TĂ©cnico-CientĂfico (CTC) da Escola Superior AgrĂĄria de Castelo Branco (ESACB) tomou posse em fevereiro de 2012, tendo decidido dar continuidade ao ciclo de conferĂȘncias iniciado pelo CTC anterior. Os trabalhos de Investigação, Inovação e Experimentação que foram apresentados demonstram nĂŁo sĂł o dinamismo e a ligação com a comunidade, como tambĂ©m a preocupação na identificação e resolução de problemas, que acrescentem valor aos produtos e processos que se situam no Ăąmbito das competĂȘncias desta Escola. Sendo este um objetivo prioritĂĄrio da missĂŁo do IPCB/ESA, a divulgação destas conferĂȘncias permite chegar a um pĂșblico mais alargado e abrir caminhos para a concretização de novos projetos, que contribuam de forma efetiva para o desenvolvimento e aumento da competitividade da regiĂŁo e do paĂs
Comportamento de dois genótipos de milho cultivados em sistema de aléias preestabelecido com diferentes leguminosas arbóreas.
O cultivo em alĂ©ias tem sido recomendado como alternativa para a substituição da agricultura de corte e queima, no trĂłpico Ășmido, devido Ă grande capacidade de produção de matĂ©ria orgĂąnica e de reciclagem de nutrientes, mas algumas dĂșvidas quanto Ă sustentabilidade e Ă competição interespecĂfica sĂŁo persistentes. O objetivo no trabalho foi avaliar a viabilidade da cultura do milho em um sistema de cultivo em alĂ©ias de leguminosas arbĂłreas. O delineamento experimental utilizado foi em blocos casualisados, com quatro repetiçÔes dos tratamentos: alĂ©ias de sombreiro (Clitoria fairchildiana), ingĂĄ (Inga edulis), guandu (Cajanus cajan) e leucena (Leucaena leucocephala) e uma testemunha sem alĂ©ias. Foram avaliadas a remobilização de carbono e nitrogĂȘnio, massa de grĂŁos, massa de mil grĂŁos e competição interespecĂfica entre as cultivares de milho e as leguminosas. A produção de grĂŁos foi maior nas parcelas com C. fairchildiana e L. leucocephala. A produtividade do hĂbrido de milho foi superior Ă da variedade em todos os tratamentos. A produtividade e a massa de mil grĂŁos de milho nĂŁo sĂŁo negativamente afetadas pela distĂąncia da linha da leguminosa arbĂłrea. Esse estudo conclui que o sistema de alĂ©ias com leguminosas arbĂłreas Ă© uma alternativa importante ao manejo sustentĂĄvel dos agroecossistemas no tropico Ășmido. AlĂ©m disso, nessa regiĂŁo a produtividade em grĂŁos na cultura do milho Ă© favorecida no sistema de alĂ©ias preeestabelecidas com as leguminosas arbĂłreas sombreiro, ingĂĄ e leucena e pela utilização de genĂłtipos eficientes no aproveitamento do nitrogĂȘnio, cujo sincronismo entre a liberação e a absorção do N aplicado por meio das leguminosas deve ser aprimorado
Avaliação da incidĂȘncia de antracnose, do desempenho e estado nutricional de variedades de mangueira, para cultivo orgĂąnico, na regiĂŁo centro-norte do Estado de SĂŁo Paulo.
A mudança do perfil do consumidor, aliada aos riscos da contaminação por agrotĂłxicos, tem levado Ă busca de alternativas ecologicamente apropriadas para produção de frutas. Os objetivos deste trabalho foram avaliar a incidĂȘncia de antracnose, o desempenho e estado nutricional de variedades de mangueira conduzidas organicamente na regiĂŁo de Pindorama-SP. Foram utilizadas 17 variedades de mangueira. O experimento foi instalado em delineamento experimental em blocos completos ao acaso, com 17 tratamentos (variedades) e seis repetiçÔes. Foi avaliada a severidade de antracnose nas folhas, atravĂ©s de uma escala diagramĂĄtica, atribuindo-se notas aos sintomas. Foram avaliados o crescimento e o desenvolvimento (altura da planta, perĂmetro do tronco e da copa) e o estado nutricional, mediante anĂĄlise foliar, das diferentes variedades utilizadas. AtravĂ©s dos resultados obtidos, podem-se considerar como muito suscetĂveis Ă antracnose as variedades Bourbon, Rocha e Rosa; e resistentes, as variedades IAC 111, Alfa, Beta e Parvin; as variedades de manga apresentaram o mesmo padrĂŁo de crescimento; as maiores alturas da planta corresponderam aos maiores diĂąmetros do tronco e da copa; a variedade Parvin apresentou o melhor desempenho dentre as variedades estudadas, com relação Ă resistĂȘncia Ă antracnose, altura e diĂąmetro do caule e da copa, podendo ser recomendada ao cultivo orgĂąnico. As variedades Omega e Alfa tambĂ©m apresentaram bom crescimento, podendo ser indicadas para esse cultivo, pelo menos nessa fase inicial; as variedades Surpresa e Rosa nĂŁo apresentaram bom desempenho, no campo, em relação Ă s demais, nĂŁo devendo ser recomendadas para o cultivo orgĂąnico, principalmente a variedade Rosa, bastante suscetĂvel Ă antracnose. As concentraçÔes de N, P e K foram elevadas na fase vegetativa das plantas, comparadas Ă baixa concentração de Ca; houve carĂȘncia de Boro em todas as variedades estudadas. A manga Rosa, provavelmente, sofreu toxicidade ao excesso de manganĂȘs, ocasionando diminuição em seu desenvolvimento
Evidence for a mixed mass composition at the `ankle' in the cosmic-ray spectrum
We report a first measurement for ultra-high energy cosmic rays of the
correlation between the depth of shower maximum and the signal in the water
Cherenkov stations of air-showers registered simultaneously by the fluorescence
and the surface detectors of the Pierre Auger Observatory. Such a correlation
measurement is a unique feature of a hybrid air-shower observatory with
sensitivity to both the electromagnetic and muonic components. It allows an
accurate determination of the spread of primary masses in the cosmic-ray flux.
Up till now, constraints on the spread of primary masses have been dominated by
systematic uncertainties. The present correlation measurement is not affected
by systematics in the measurement of the depth of shower maximum or the signal
in the water Cherenkov stations. The analysis relies on general characteristics
of air showers and is thus robust also with respect to uncertainties in
hadronic event generators. The observed correlation in the energy range around
the `ankle' at differs significantly from
expectations for pure primary cosmic-ray compositions. A light composition made
up of proton and helium only is equally inconsistent with observations. The
data are explained well by a mixed composition including nuclei with mass . Scenarios such as the proton dip model, with almost pure compositions, are
thus disfavoured as the sole explanation of the ultrahigh-energy cosmic-ray
flux at Earth.Comment: Published version. Added journal reference and DOI. Added Report
Numbe
Heavy quarkonium: progress, puzzles, and opportunities
A golden age for heavy quarkonium physics dawned a decade ago, initiated by
the confluence of exciting advances in quantum chromodynamics (QCD) and an
explosion of related experimental activity. The early years of this period were
chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in
2004, which presented a comprehensive review of the status of the field at that
time and provided specific recommendations for further progress. However, the
broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles
could only be partially anticipated. Since the release of the YR, the BESII
program concluded only to give birth to BESIII; the -factories and CLEO-c
flourished; quarkonium production and polarization measurements at HERA and the
Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the
deconfinement regime. All these experiments leave legacies of quality,
precision, and unsolved mysteries for quarkonium physics, and therefore beg for
continuing investigations. The plethora of newly-found quarkonium-like states
unleashed a flood of theoretical investigations into new forms of matter such
as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the
spectroscopy, decays, production, and in-medium behavior of c\bar{c}, b\bar{b},
and b\bar{c} bound states have been shown to validate some theoretical
approaches to QCD and highlight lack of quantitative success for others. The
intriguing details of quarkonium suppression in heavy-ion collisions that have
emerged from RHIC have elevated the importance of separating hot- and
cold-nuclear-matter effects in quark-gluon plasma studies. This review
systematically addresses all these matters and concludes by prioritizing
directions for ongoing and future efforts.Comment: 182 pages, 112 figures. Editors: N. Brambilla, S. Eidelman, B. K.
Heltsley, R. Vogt. Section Coordinators: G. T. Bodwin, E. Eichten, A. D.
Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A.
Petrov, P. Robbe, A. Vair
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