Eficiência agronômica de tecnologias de tratamento da ureia na cultura do algodão.

A cultura do algodão utiliza grande quantidade de fertilizantes nitrogenadas no processo produtivo. O objetivo deste trabalho foi avaliar tecnologias de tratamento da ureia para aumento da sua eficiência, no algodão. Avaliou-se o efeito de cinco fertilizantes nitrogenados em três doses, sob delineamento fatorial, além de um tratamento controle sem adubação nitrogenada, em duas safras no Mato Grosso, no rendimento de algodão em caroço, no número de maças, no peso de capulhos, na altura final e população de plantas. As doses de N avaliadas foram 0, 60, 90 e 120 kg ha-1, correspondentes à 0, 50, 75 e 100% da dose recomendada, respectivamente. Os parâmetros avaliados foram alterados positivamente pelas doses, mas não pelas tecnologias de tratamento da ureia, em ambas as safras. As tecnologias de tratamento para aumento da eficiência da ureia não permitem reduzir a dose de N recomendada, mas aumenta a eficiência agronômica na dose recomendada, em comparação com a ureia comum

Challenges in developing new technologies for special needs education: a force-field analysis

ABSTRACT Introduction of new technologies for use in special needs education requires careful design to ensure that their use is suitable for the intended users in the context of use and that learners benefit from the experience. This paper discusses issues that influence implementation of collaborative technologies designed to support learning of social communication skills in young people with autism. Taking a reflective view of lessons learned during the COSPATIAL project, a force-field analysis was applied to identify positive factors contributing to successful application development and negative factors that disrupted progress and implementation of the software. On the basis of our experience in the COSPATIAL project, recommendations for future projects are made

Avaliação de substratos de húmus de minhoca na produção de mudas de alface (Lactuca sativa) cultivar Lucy Brown.

bitstream/item/68817/1/020-nascimento-avaliacao.pdfPublicado também no Cadernos de Agroecologia, v. 7, n.2, 2012

Incidência de bicho-mineiro em diferentes cultivares de cafeeiro em sistema agroecológico.

bitstream/item/68482/1/061-Incidencia-de-bicho-mineiro-em-diferentes-cultivares-de-cafeeiro.pdfPublicado também no Cadernos de Agroecologia, v. 7, n. 2, 2012

Avaliação do nível de infestação de Leucoptera coffeella (bicho mineiro) em cafeeiro sob manejo agroecológico em sistema solteiro e consorciado com bananeira.

bitstream/item/69066/1/022-silva-avaliacao.pdfPublicado também no Cadernos de Agroecologia, v. 7, n.2, 2012

User-centred design of flexible hypermedia for a mobile guide: Reflections on the hyperaudio experience

A user-centred design approach involves end-users from the very beginning. Considering users at the early stages compels designers to think in terms of utility and usability and helps develop the system on what is actually needed. This paper discusses the case of HyperAudio, a context-sensitive adaptive and mobile guide to museums developed in the late 90s. User requirements were collected via a survey to understand visitors’ profiles and visit styles in Natural Science museums. The knowledge acquired supported the specification of system requirements, helping defining user model, data structure and adaptive behaviour of the system. User requirements guided the design decisions on what could be implemented by using simple adaptable triggers and what instead needed more sophisticated adaptive techniques, a fundamental choice when all the computation must be done on a PDA. Graphical and interactive environments for developing and testing complex adaptive systems are discussed as a further step towards an iterative design that considers the user interaction a central point. The paper discusses how such an environment allows designers and developers to experiment with different system’s behaviours and to widely test it under realistic conditions by simulation of the actual context evolving over time. The understanding gained in HyperAudio is then considered in the perspective of the developments that followed that first experience: our findings seem still valid despite the passed time

Combined transcriptomic-(1)H NMR metabonomic study reveals yhat monoethylhexyl phthalate stimulates adipogenesis and glyceroneogenesis in human adipocytes

Adipose tissue is a major storage site for lipophilic environmental contaminants. The environmental metabolic disruptor hypothesis postulates that some pollutants can promote obesity or metabolic disorders by activating nuclear receptors involved in the control of energetic homeostasis. In this context, monoethylhexyl phthalate (MEHP) is of particular concern since it was shown to activate the peroxisome proliferator-activated receptor γ (PPARγ) in 3T3-L1 murine preadipocytes. In the present work, we used an untargeted, combined transcriptomic-(1)H NMR-based metabonomic approach to describe the overall effect of MEHP on primary cultures of human subcutaneous adipocytes differentiated in vitro. MEHP stimulated rapidly and selectively the expression of genes involved in glyceroneogenesis, enhanced the expression of the cytosolic phosphoenolpyruvate carboxykinase, and reduced fatty acid release. These results demonstrate that MEHP increased glyceroneogenesis and fatty acid reesterification in human adipocytes. A longer treatment with MEHP induced the expression of genes involved in triglycerides uptake, synthesis, and storage; decreased intracellular lactate, glutamine, and other amino acids; increased aspartate and NAD, and resulted in a global increase in triglycerides. Altogether, these results indicate that MEHP promoted the differentiation of human preadipocytes to adipocytes. These mechanisms might contribute to the suspected obesogenic effect of MEHP

Clinical and pathological findings of a fatal systemic capillary leak syndrome (Clarkson Disease)

Systemic capillary leak syndrome (SCLS) is a rare disorder with episodes of hypotension, hypoalbuminemia, and hemoconcentration. During attacks endothelial hyperpermeability results in leakage of plasma proteins into the interstitial space. Attacks vary in severity and may be lethal.A 49-year-old previously healthy man was admitted to hospital for hypovolemic shock, anasarca with pleuropericardial effusion, muscle fatigue, and oliguria occurring after a flu-like syndrome. Laboratory data showed an increase in hematocrit (65%), leucocytes (24.590\u200a\u3bc/L), creatinine (2.5\u200amg/dL), creatine phosphokinase (10.000\u200aU/L), and a decrease in serum albumin (17\u200ag/L) without proteinuria. Immunoglobulins of class G/\u3bb monoclonal gammopathy were detected (1.3\u200ag/L). The initial suspicions addressed to a protein-loosing syndrome or to an effort-related rhabdomyolysis. Initial therapy was based on steroids, albumin, and high molecular weight plasma expanders (hydroxyethyl starch). Because of high hematocrit, phlebotomy was also performed. The patient had complete clinical remission and a diagnosis of SCLS was finally made. He received prophylactic therapy with verapamil and theophylline that was self-stopped for intolerance (hypotension and tachycardia). He had a new crisis 2 days after a physical effort, and was admitted in intensive care unit. The patient died for severe hypovolemic shock with multiorgan failure and sudden cardiac arrest 15 hours after hospital admission. Postmortem investigation revealed massive interstitial edema of main organs with myocardial hyperacute ischemia.Studies on SCLS are limited for the rarity of the disease and its unpredictable course. Both prophylactic and acute crisis treatments are empirical and optimal management of severe attacks is still lacking

Assessment of the control measures of the category A diseases of Animal Health Law: Classical Swine Fever

EFSA received a mandate from the European Commission to assess the effectiveness of some of the control measures against diseases included in the Category A list according to Regulation (EU) 2016/429 on transmissible animal diseases (‘Animal Health Law’). This opinion belongs to a series of opinions where these control measures will be assessed, with this opinion covering the assessment of control measures for Classical swine fever (CSF). In this opinion, EFSA and the AHAW Panel of experts review the effectiveness of: (i) clinical and laboratory sampling procedures, (ii) monitoring period and (iii) the minimum radii of the protection and surveillance zones, and the minimum length of time the measures should be applied in these zones. The general methodology used for this series of opinions has been published elsewhere; nonetheless, details of the model used for answering these questions are presented in this opinion as well as the transmission kernels used for the assessment of the minimum radius of the protection and surveillance zones. Several scenarios for which these control measures had to be assessed were designed and agreed prior to the start of the assessment. Here, several recommendations are given on how to increase the effectiveness of some of the sampling procedures. Based on the average length of the period between virus introduction and the reporting of a CSF suspicion, the monitoring period was assessed as non-effective. In a similar way, it was recommended that the length of the measures in the protection and surveillance zones were increased from 15 to 25 days in the protection zone and from 30 to 40 days in the surveillance zone. Finally, the analysis of existing Kernels for CSF suggested that the radius of the protection and the surveillance zones comprise 99% of the infections from an affected establishment if transmission occurred. Recommendations provided for each of the scenarios assessed aim to support the European Commission in the drafting of further pieces of legislation, as well as for plausible ad hoc requests in relation to CSF