958 resultados para MAGNETIZATION STEPS
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The context of Northern Ireland in the transition of conflict has produced a range of efforts to bring about reconciliation. However, definitions and understandings of the nature of reconciliation differ. This paper draws together how reconciliation has been defined in theory in Northern Ireland and elsewhere, examines some models of practice in the light of that theory and illustrates the process of reconciliation through general initiatives in Northern Ireland and specific projects seeking to reconcile at community level. It is concluded that, while political and public processes can set a context and space for engagement to take place, reconciliation is fundamentally about personal encounter and relationship, which have to take place in a range of settings and at all levels of a society that has experienced conflict.
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Abandonment of farming systems on upland areas in southwest Britain during the Late Bronze Age – some 3000 years ago – is widely considered a ‘classic’ demonstration of the impact of deteriorating climate on the vulnerability of populations in such marginal environments. Here we test the hypothesis that climate change drove the abandonment of upland areas by developing new chronologies for human activity on upland areas during the Bronze Age across southwest Britain (Dartmoor, Exmoor and Bodmin Moor). We find Bronze Age activity in these areas spanned 3900–2950 calendar years ago with abandonment by 2900 calendar years ago. Holocene Irish bog and lake oak tree populations provide evidence of major shifts in hydroclimate across western Britain and Ireland, coincident with ice rafted debris layers recognized in North Atlantic marine sediments, indicating significant changes in the latitude and intensity of zonal atmospheric circulation across the region. We observe abandonment of upland areas in southwest Britain coinciding with a sustained period of extreme wet conditions that commenced 3100 calendar years ago. Our results are consistent with the view that climate change increased the vulnerability of these early farming communities and led to a less intensive use of such marginal environments across Britain.
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Inserida no setor do calçado, a Atlanta Steps é uma empresa que dedica a sua atividade maioritariamente à produção de solas para calçado. No decorrer da sua atividade produtiva existe potência calorífica libertada pelas máquinas que é necessário retirar para o exterior. Para o efeito, a empresa dispõe de um sistema de refrigeração das máquinas que opera de forma pouco eficiente, sobretudo em dias típicos de verão. É objetivo da presente dissertação efetuar um diagnóstico energético ao sistema de refrigeração da empresa por forma a avaliar: a potência calorifica libertada por cada máquina, a potência de refrigeração instalada, e o padrão de utilização de cada máquina, entre outros fatores. Com base no diagnóstico realizado são apresentadas propostas de melhoria que visam aumentar a eficiência energética do sistema e diminuir custos associados à refrigeração das máquinas, bem como melhorar a qualidade dos produtos da Atlanta Steps.
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The main aim of the workshop was to extend international dialogue and promote the development of VREs led by researcher needs. On the first day principal investigators and project managers of a great variety of projects provided an insight in the current state of development regarding technical innovation, disciplinary specific solutions, and impact on the research community. A series of short presentations of selected projects were followed by an extensive poster session that functioned as a "trade fair" of current trends in the field of VRE development and implementation. The second day was dedicated to the discussion of the "next steps" to improve and advance the development of VREs and to foster ideas for future engagement. The results of landscape studies funded by Jisc and the SURFfoundation were presented as Key Notes and impulse for the following discussions in four sub-groups. The sub-groups concentrated on the following four key themes: technological challenges organisation & concepts researcher needs strategic issues The outcomes of the separate discussions consisted of recommendations to the Knowledge Exchange initiative itself, for the Knowledge Exchange partner organisations and beyond.
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Soil-dwelling Streptomyces bacteria are known for their ability to produce biologically active compounds such as antimicrobial, immunosuppressant, antifungal and anticancer drugs. S. nogalater is the producer of nogalamycin, a potential anticancer drug exhibiting high cytotoxicity and activity against human topoisomerases I and II. Nogalamycin is an anthracycline polyketide comprising a four-ring aromatic backbone,a neutral deoxy sugar at C7, and an amino sugar attached via an O–C bond at C1 and a C–C bond between C2 and C5´´. This kind of attachment of the amino sugar is unusual thus making the structure of the compound highly interesting. The sugar is also associated with the biological activity of nogalamycin, as it facilitates binding to DNA. Furthermore, the sugar moieties of anthracyclines are often crucial for their biological activity. Together the interesting attachment of the amino sugar and the general reliance of polyketides on the sugar moieties for bioactivity have made the study of the biosynthesis of nogalamycin attractive. The sugar moieties are typically attached by glycosyltransferases, which use two substrates: the donor and the acceptor. The literature review of the thesis is focused on the glycosylation of polyketides and the possibilities to alter their glycosylation patterns. My own thesis work revolves around the biosynthesis of nogalamycin. We have elucidated the individual steps that lead to its rather unique structure. We reconstructed the whole biosynthetic pathway in the heterologous host S. albus using a cosmid and a plasmid. In the process, we were able to isolate new compounds when the cosmid, which contains the majority of the nogalamycin gene cluster, was expressed alone in the heterologous host. The new compounds included true intermediates of the pathway as well as metabolites, which were most likely altered by the endogenous enzymes of the host. The biological activity of the most interesting new products was tested against human topoisomerases I and II, and they were found to exhibit such activities. The heterologous expression system facilitated the generation of mutants with inactivated biosynthetic genes. In that process, we were able to identify the functions of the glycosyltransferases SnogE and SnogD, solve the structure of SnogD, discover a novel C1-hydroxylase system comprising SnoaW and SnoaL2, and establish that the two homologous non-heme α-ketoglutarate and Fe2+ dependent enzymes SnoK and SnoN catalyze atypical reactions on the pathway. We demonstrated that SnoK was responsible for the formation of the additional C–C bond, whereas SnoN is an epimerase. A combination of in vivo and in vitro techniques was utilized to unravel the details of these enzymes. Protein crystallography gave us an important means to understand the mechanisms. Furthermore, the solved structures serve as platforms for future rational design of the enzymes.
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This brochure translated into Spanish gives steps to comfortable breastfeeding.
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This study presents the laboratory scale results of an extra step in Poly (ethylene terephthalate) - PET mechanical recycling (grinding, washing, drying and reprocessing): a chemical washing after the conventional one. Cooking oil PET bottle flakes were washed in water and then subjected to a reaction with an aqueous solution of sodium hydroxide 5 M at 90 degrees C for 10 min (chemical washing). After rinsing and drying, the flakes were characterized by thermogravimetry, gas chromatography and elemental analysis tests. The results indicated that the chemically washed material had higher purity than PET washed only with water: 99.3% and 96.7%, respectively, which undoubtedly implies properties, applications and prices closer to those of virgin resin. The production of purified terephthalic acid (TPA) from the chemical washing residue was optimized and reached a purity of 99.6%. Despite the results, the use of chemically washed PET and of TPA obtained is not recommended for direct contact with food, since they still contain some impurities. (C) 2009 Elsevier Ltd. All rights reserved.
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This document is designed to: provide examples of the standards, skills, and knowledge your child will learn in English language arts and should be able to do upon exiting fifth grade ; suggest activities on how you can help your child at home ; offer additional resources for information and help.
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This document is designed to: provide examples of the standards, skills, and knowledge your child will learn in English language arts and should be able to do upon exiting fourth grade ; suggest activities on how you can help your child at home ; offer additional resources for information and help.
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This document is designed to: provide examples of the standards, skills, and knowledge your child will learn in mathematics and should be able to do upon exiting fourth grade ; suggest activities on how you can help your child at home ; offer additional resources for information and help.
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This document is designed to: provide examples of the standards, skills, and knowledge your child will learn in mathematics and should be able to do upon exiting third grade ; suggest activities on how you can help your child at home ; offer additional resources for information and help.
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This document is designed to: provide examples of the standards, skills, and knowledge your child will learn in mathematics and should be able to do upon exiting fifth grade ; suggest activities on how you can help your child at home ; offer additional resources for information and help.
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This document is designed to: provide examples of the standards, skills, and knowledge your child will learn in English language arts and should be able to do upon exiting third grade ; suggest activities on how you can help your child at home ; offer additional resources for information and help.