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Search Results: 1 - 10 of 1767 matches for " Eugenio;Alfenas "
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Flutua??o populacional de Rhizoctonia spp. em jardim clonal de Eucalyptus spp
Sanfuentes, Eugenio;Alfenas, Acelino C.;Maffia, Luiz A.;Mafia, Reginaldo G.;
Fitopatologia Brasileira , 2007, DOI: 10.1590/S0100-41582007000200004
Abstract: leaf blight in shoots of clonal hedges and web blight of cuttings for rooting, caused by rhizoctonia species, may be limiting to the production of eucalyptus seedlings by cuttings. despite their importance, there have been few etiological and epidemiological studies of these diseases. to optimize disease management strategies, this research aimed to evaluate population dynamics of rhizoctonia spp. in soil and eucalyptus cuttings to correlate with disease incidence, and to determine spatial distribution of rhizoctonia spp. inoculum in a clonal nursery of eucalyptus cuttings. population fluctuation of rhizoctonia spp. was detected throughout the year. pathogen distribution in soil was found to have an aggregated pattern. temperature, but not rainfall, was correlated to population levels of rhizoctonia spp in soil samples.
Caracteriza??o de isolados de Rhizoctonia spp. e identifica??o de novos grupos de anastomose em jardim clonal de eucalipto
Sanfuentes, Eugenio;Alfenas, Acelino C.;Maffia, Luiz A.;Mafia, Reginaldo G.;
Fitopatologia Brasileira , 2007, DOI: 10.1590/S0100-41582007000300007
Abstract: rhizoctonia spp. cause shoot and leaf blight of eucalyptus in clonal hedges as well as cuttings. despite the importance of rhizoctonia spp. to eucalyptus, little is known about their diversity. thus, we characterized isolates and report new anastomosis groups in a eucalyptus clonal hedge. isolates obtained at different stages of cutting propagation were characterized according to the number of nuclei in vegetative cells, grouped by morphological characteristics of the colony, anastomosis group, and thiamine auxotrophism. the isolates were also evaluated for virulence on eucalyptus and effect of temperature on their mycelial growth. no correlation between morphological grouping and anastomosis reaction was detected. a wide range of isolates, predominantly binucleate, forms the population of rhizoctonia spp. present in the soil of clonal hedges, which differed in virulence to eucalyptus. binucleate and multinucleate isolates had similar growth features at different temperatures, with an optimum growth rate between 25-30 oc. isolates of r. solani ag2-2 iiib and binucleate isolates of rhizoctonia spp., ag-p and ag-o, as agents of cutting rot, and binucleate isolates ag-a and ag-l in the soil of eucalyptus clonal hedge are reported for the first time.
Supress o da atividade saprofítica de Rhizoctonia spp. em solos de jardim clonal de Eucalyptus
SANFUENTES EUGENIO A.,ALFENAS ACELINO C.,MAFFIA LUIZ A.,SILVEIRA SILVALDO F.
Fitopatologia Brasileira , 2002,
Abstract: Avaliou-se a eficiência de Trichoderma longibranchiatum (UFV-1), de T. inhamatum (UFV-2 e UFV-3), compostos de casca e folhas de eucalipto contra Rhizoctonia spp., aplicados em solo de jardim clonal de eucalipto (Eucalyptus sp.). Em solos artificialmente infestados com Rhizoctonia spp., sob condi es controladas, os antagonistas UFV-2 e UFV-3 apresentaram níveis elevados de supressividade, quando se aumentou a fonte alimentar na formula o, de 5 a 50 g de farelo de trigo por litro. No campo, o antagonista UFV-3 n o teve efeito significativo na redu o do inóculo de Rhizoctonia spp. Compostos de casca de eucalipto apresentaram diferentes graus de supress o a Rhizoctonia spp., dependendo da origem e do lote do composto. A incorpora o de folhas de eucalipto ao solo favoreceu o aumento do inóculo de Rhizoctonia spp.
Supress?o da atividade saprofítica de Rhizoctonia spp. em solos de jardim clonal de Eucalyptus
SANFUENTES, EUGENIO A.;ALFENAS, ACELINO C.;MAFFIA, LUIZ A.;SILVEIRA, SILVALDO F.;PENCHEL, RICARDO;SARTORIO, ROBERT C.;
Fitopatologia Brasileira , 2002, DOI: 10.1590/S0100-41582002000500004
Abstract: the effectiveness of trichoderma longibranchiatum (ufv-1), t. inhamatum (ufv-2 and ufv-3), eucalyptus bark compost and leaves of eucalyptus was tested for the suppression of rhizoctonia spp. in the soil of a clonal hedge of eucalyptus under controlled conditions. soils artificially infested with rhizoctonia spp., the antagonists ufv-2 and ufv-3 showed high levels of suppression of the pathogen when the feeding formulation rose from 5 to 50 g wheat bran per liter. however, in the field, the antagonist ufv-3 did not show a significant effect in reducing the inoculum of rhizoctonia spp. eucalypt us bark compost resulted in different levels of suppression of the pathogen depending on the compost pile and source. adding eucalyptus leaves to the soil favored the inoculum of rhizoctonia spp.
The Virtuous Circle of Corporate Social Performance and Corporate Social Disclosure  [PDF]
Francesco Gangi, Eugenio D’Angelo
Modern Economy (ME) , 2016, DOI: 10.4236/me.2016.712129
Abstract: Previous literature in the field of corporate social responsibility investigates whether corporate social performance can be seen as a determinant of corporate social disclosure or, conversely, if corporate social disclosure is a determinant of corporate social performance. The aim of this paper is to join these two streams of research in a unique theoretical model, which can demonstrate that there is a mutual interaction between performance and disclosure. This can result, in the long run, in a virtuous circle where higher social performance generates future higher social disclosure and this determines higher future social performance and so on. An analytical model has been adopted to demonstrate the research hypothesis. Gathering data from the portfolios of the European Socially responsible funds (SRFs) listed on the Morningstar platform in 2010, the study analyzed 160 social reports published by 80 companies during 2008 and 2009. Findings, by demonstrating the non-one-way relationship between social performance and social disclosure, confirm the existence of a mutual influence between the results gained in different CSR areas and the capability to control and communicate such performance. In this way, the paper provides not only theoretical insights, but also practical implications for managers that are required to put in place responsive and effective initiatives towards the increasing pressure exerted by the internal and external environments in which they operate.
The Risks of Inappropriateness in Cardiac Imaging
Eugenio Picano
International Journal of Environmental Research and Public Health , 2009, DOI: 10.3390/ijerph6051649
Abstract: The immense clinical and scientific benefits of cardiovascular imaging are well-established, but are also true that 30 to 50% of all examinations are partially or totally inappropriate. Marketing messages, high patient demand and defensive medicine, lead to the vicious circle of the so-called Ulysses syndrome. Mr. Ulysses, a typical middle-aged “worried-well” asymptomatic subject with an A-type coronary personality, a heavy (opium) smoker, leading a stressful life, would be advised to have a cardiological check-up after 10 years of war. After a long journey across imaging laboratories, he will have stress echo, myocardial perfusion scintigraphy, PET-CT, 64-slice CT, and adenosine-MRI performed, with a cumulative cost of >100 times a simple exercise-electrocardiography test and a cumulative radiation dose of >4,000 chest x-rays, with a cancer risk of 1 in 100. Ulysses is tired of useless examinations, exorbitant costs. unaffordable even by the richest society, and unacceptable risks.
Mammography and beyond: developing technologies for the early detection of breast cancer
Eugenio Paci
Breast Cancer Research , 2002, DOI: 10.1186/bcr429
Abstract: Following a short presentation of the history of mammography, the theory of efficacy evaluation through randomized clinical trials (all referenced) and the more recent evaluations of screening programmes that are ongoing in several countries are critically re-examined. The second chapter discusses new developments in breast imaging and in related technologies; a table presents the current status of imaging technologies for a large number of devices, few of which are currently of interest with regard to early detection. Most of the technologies discussed pertain to clinical diagnosis, and are unlikely to surpass mammography in the field of early detection in the near future.A chapter entitled Technologies in development: genetic and tumor markers reports on the progress that has been made in this important field, but it states that "... the ability to predict who will develop breast cancer is modest at best." We are still in the realm of basic research, and application of these technologies in screening is far from reaching routine daily practice. However, the authors emphasize the opportunity to improve predictive oncology in the early stages of breast cancer. Furthermore, with private companies developing genetic tests, and the fact that "The tests are not subject to FDA [Food and Drug Administration] regulation and thus clinical validity and utility did not have to be documented before entry into the market", there is a need for a new policy and for genetic counselling for women who request testing.The following chapter on the development and regulation of new technologies (which is referred to only within the context of the USA) is original to the best of my knowledge, at least for a European audience. The narrative of the initiatives and collaborations that have been active between government agencies, private industries and associations, and the examples of funding mechanisms for medical technology development confirm the massive investment into breast cancer c
Economic and biological costs of cardiac imaging
Eugenio Picano
Cardiovascular Ultrasound , 2005, DOI: 10.1186/1476-7120-3-13
Abstract: A Renaissance of cardiac imaging occurred in the 1980s [1]. New technologies allowed the non-invasive description of cardiac function, perfusion, and metabolism in a polychrome, three-dimensional, overwhelming fashion. Almost unlimited resources were devoted to patient care in the economic framework of the affluent society. At the beginning of the 1990s, The Renaissance made its transition into the splendid decadence of the Baroque. The increasing technological burden in clinical cardiology paradoxically did not bring a parallel increase in the quality of care but rather an increase in cost. The economic climate had changed; the illusion of unlimited economic resources had come to an end [2]. Keeping in mind that each test represents a cost, often a risk, and always a diagnostic hypothesis, we can agree that every unnecessary and unjustifiable test is one test too many. Small individual costs, risks, and wastes multiplied by billions of examinations per year represent an important population [3], society [4] and environmental [5] burden. Unfortunately, the appropriateness of cardiac imaging is usually extra-ordinarily low and there is little awareness among patients and physicians of the elementary physical basis, differential costs, radiological doses, and long term risks of different imaging modalities [6]. It is also well known that – in the words of Bernard Lown – "technology in medicine is frequently untested scientifically, often applied without data relating to cost benefit, and driven by market forces rather than by patient needs." Bernard Lown, 2004 [7]."Ten years ago, medical imaging wasn't even in the radar screen for most health insurers. In 2004, it' s one of the highest cost items in a health plan's medical budget, and also one of the fastest growing". (Atlantic info service newsletter, 2004) [8]. As an example, in U.S. during the year 2002, 7.8 million cardiac perfusion scans were performed, with a growth of 40% in the last 3 years [9]. Still in U.S.,
Anniversary Editorial: One year of Cardiovascular Ultrasound
Eugenio Picano
Cardiovascular Ultrasound , 2004, DOI: 10.1186/1476-7120-2-3
Abstract: Cardiovascular Ultrasound is an Open Access, peer-reviewed online journal covering clinical, technological, experimental, biological, and molecular aspects of ultrasound applications in cardiovascular physiology and disease.Cardiovascular Ultrasound is aimed at providing a suitable tribune for the most current, clinically and biologically relevant, and high quality research in the field of ultrasound of heart and vessels. The journal publishes peer-reviewed original research, updated reviews, case reports on challenging and/or unusual diagnostic aspects, and expert opinions on new techniques and technologies. Other feature of interest to the cardiologist, the sonographer and allied scientists is the "natural born digital" nature of the journal, with the possibility to publish colour illustrations and video clips with no extra costs. This feature is especially attractive in a field so dynamic (both in a conceptual and in a cinematic sense) as ultrasound. The possibility to go immediately to Pubmed, and the publication of video-clips, will tremendously increase the scientific impact of your material. Cardiovascular Ultrasound might become a good first choice for much of your "hot material", when time is not an independent variable.The cardiovascular ultrasound community needs an Open Access forum in which to publish peer-reviewed articles with speed (in revision and publication), and versatility (in arguments, ranging from biology to engineering to clinical echocardiography). Cardiovascular Ultrasound aims to be that forum.Manuscripts must be submitted to Cardiovascular Ultrasound electronically using the online submission system. Full details of how to submit a manuscript are given in the instructions for authors. Cardiovascular Ultrasound reviews all the material it receives. About 10 % of articles are rejected after review in-house. The usual reasons for rejection at this stage are insufficient originality or serious scientific flaws. We aim to reach a decision on
Zinc and ageing: third Zincage conference
Eugenio Mocchegiani
Immunity & Ageing , 2007, DOI: 10.1186/1742-4933-4-5
Abstract: Zincage [1] is a specific targeted research project (STREP) funded by the European Union in the 6th Framework Program (FP6). It includes epidemiological studies on the influence of diet and lifestyle on healthy ageing, aimed at preventing adult degenerative disease, particularly focusing on cardiovascular diseases and also addressing malnutrition of the elderly. The conference held in Ancona, January 2007, was focussed particularly on the effects of Zn supplementation in the elderly and on the possible influences of dietary, biochemical and genetic factors on the individual response. Zn deficiency, cell-mediated immune dysfunction and increased oxidative stress are common in elderly subjects and it is quite clear that dietary habits including Zn consumption have a great impact on these factors. Zn supplementation in the elderly can improve the immune response and reduce oxidative stress markers, thereby contributing to a reduced incidence of infections. However, individual differences in the response to Zn can lead to contradictory results even with supplementation trials performed in elderly people of the same age-groups. One of the reasons for these individual differences is the different genetic background of the subjects enrolled in the study. In fact, some proteins with documented polymorphic sites are involved in regulating Zn homeostasis. One important class of such proteins are the metallothioneins (MT), which bind Zn with high affinity but, at the same time, release free Zn ions in response to oxidative/nitrosative stress and thereby modulate the expression of Zn-dependent genes and activate antioxidant enzymes. Differences in Zn status have also been observed in individuals carrying different alleles for polymorphisms of pro-inflammatory cytokines (i.e. IL-6 and TNF-alpha). In addition, the individual response can be modulated by dietary habits because Zn absorption and availability is dependent on the intake of other nutrients and trace elements.These asp
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