195 resultados para Greening
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This report discusses findings of a case study into "Green Buildings" undertaken as a part of the retrospective analysis component of Sustainable Built Environment National Research Centre (SBEnrc) Project 2.7 Leveraging R&D investment for the Australian Built Environment. The Western Australian Government (WAG) has taken a leadership role for a number of decades in developing more environmentally responsive buildings. In the past decade, considerable initiatives have been introduced to contribute to: (i) greening the stock of government buildings; and (ii) providing leadership in the development of other non-residential buildings developed commercially. This role has been informed by global, national and internal initiatives and research in this area. This case study investigates: (i) the nature of this leadership; and (ii) the role of R&D policy development; and (iii) the dissemination and impact of outcomes in the broader industry. This case study should be read in conjunction with Part 1 of this suite of reports.
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The overall aim of this research project was to provide a broader range of value propositions (beyond upfront traditional construction costs) that could transform both the demand side and supply side of the housing industry. The project involved gathering information about how building information is created, used and communicated and classifying building information, leading to the formation of an Information Flow Chart and Stakeholder Relationship Map. These were then tested via broad housing industry focus groups and surveys. The project revealed four key relationships that appear to operate in isolation to the whole housing sector and may have significant impact on the sustainability outcomes and life cycle costs of dwellings over their life cycle. It also found that although a lot of information about individual dwellings does already exist, this information is not coordinated or inventoried in any systematic manner and that national building information files of building passports would present value to a wide range of stakeholders.
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This article investigates the extent to which the purported greening of food retailing and consumption in Australia is consistent with the development of a corporate-environmental food regime. Recent developments in food regime theory, particularly the concept of an emerging third food regime (the so-called ‘corporate-environmental food regime’), provide a useful organizing framework for understanding recent agri-restructuring trends. We find that, while a globally based, third food regime is becoming more apparent, the attributes that relate to corporate retail-driven greening of the supply chain are less evident within Australia’s domestic market than in its EU counterparts. However, there is some evidence that Australia’s export market is subject to some degree of ‘greening at a distance’ due to private regulations imposed by supermarkets overseas. We argue that while broader agri-restructuring trends may be evident at an international level, elements of greening specific to national contexts are important for determining the trajectory of any third food regime.
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Providing mobility corridors for communities, enabling freight networks to transport goods and services, and a pathway for emergency services and disaster relief operations, roads are a vital component of our societal system. In the coming decades, a number of modern issues will face road agencies as a result of climate change, resource scarcity and energy related challenges that will have implications for society. To date, these issues have been discussed on a case by case basis, leading to a fragmented approach by state and federal agencies in considering the future of roads – with potentially significant cost and risk implications. Within this context, this paper summarises part of a research project undertaken within the ‘Greening the Built Environment’ program of the Sustainable Built Environment National Research Centre (SBEnrc, Australia), which identified key factors or ‘trends’ affecting the future of roads and key strategies to ensure that road agencies can continue to deliver road infrastructure that meets societal needs in an environmentally appropriate manner. The research was conducted over two years, including a review of academic and state agency literature, four stakeholder workshops in Western Australia and Queensland, and industry consultation. The project was supported financially and through peer review and contribution, by Main Roads Western Australia, QLD Department of Transport and Main Roads, Parsons Brinckerhoff, John Holland Group, and the Australian Green Infrastructure Council (AGIC). The project highlighted several potential trends that are expected to affect road agencies in the future, including predicted resource and materials shortages, increases in energy and natural resources prices, increased costs related to greenhouse gas emissions, changing use and expectations of roads, and changes in the frequency and intensity of weather events. Exploring the implications of these potential futures, the study then developed a number of strategies in order to prepare transport agencies for the associated risks that such trends may present. An unintended outcome of the project was the development of a process for enquiring into future scenarios, which will be explored further in Stage 2 of the project (2013-2014). The study concluded that regardless of the type and scale of response by the agency, strategies must be holistic in approach, and remain dynamic and flexible.
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Restriction fragment length polymorphisms have been used to determine the chromosomal location of the genes encoding the glycine decarboxylase complex (GDC) and serine hydroxymethyltransferase (SHMT) of pea leaf mitochondria. The genes encoding the H subunit of GDC and the genes encoding SHMT both show linkage to the classical group I marker i. In addition, the genes for the P protein of GDC show linkage to the classic group I marker a. The genes for the L and T proteins of GDC are linked to one another and are probably situated on the satellite of chromosome 7. The mRNAs encoding the five polypeptides that make up GDC and SHMT are strongly induced when dark-grown etiolated pea seedlings are placed in the light. Similarly, when mature plants are placed in the dark for 48 h, the levels of both GDC protein and SHMT mRNAs decline dramatically and then are induced strongly when these plants are returned to the light. During both treatments a similar pattern of mRNA induction is observed, with the mRNA encoding the P protein of GDC being the most rapidly induced and the mRNA for the H protein the slowest. Whereas during the greening of etiolated seedlings the polypeptides of GDC and SHMT show patterns of accumulation similar to those of the corresponding mRNAs, very little change in the level of the polypeptides is seen when mature plants are placed in the dark and then re-exposed to the light.
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Contextual factors for sustainable development such as population growth, energy, and resource availability and consumption levels, food production yield, and growth in pollution, provide numerous complex and rapidly changing education and training requirements for a variety of professions including engineering. Furthermore, these requirements may not be clearly understood or expressed by designers, governments, professional bodies or the industry. Within this context, this paper focuses on one priority area for greening the economy through sustainable development—improving energy efficiency—and discusses the complexity of capacity building needs for professionals. The paper begins by acknowledging the historical evolution of sustainability considerations, and the complexity embedded in built environment solutions. The authors propose a dual-track approach to building capacity building, with a short-term focus on improvement (i.e., making peaking challenges a priority for postgraduate education), and a long-term focus on transformational innovation (i.e., making tailing challenges a priority for undergraduate education). A case study is provided, of Australian experiences over the last decade with regard to the topic area of energy efficiency. The authors conclude with reflections on implications for the approach.
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Construction scholars suggest that procurement processes can be used as mechanisms to change construction industry practices. This paper discusses industry changes as a response to the calls for integration of sustainability ideals into construction practices. Because major infrastructure construction has been identified as a key producer of greenhouse gas emissions (GHGE), this study explores collaborative procurement models that have been used to facilitate mitigation of GHGE. The study focuses on the application of non-price incentives and rewards that work together as a binary mechanism. Data were collected using mixed-methods: government document content analysis was complemented with data collected through focus groups and individual interviews with both clients and contractors. This report includes examples of greening procurement agendas for three Australian road authorities relating to collaborative procurement project delivery models. Three collaborative procurement models, Alliance Consortium, Early Contractor Involvement and Public Private Partnerships provide evidence of construction projects that were completed early. It can also be argued that both clients and contractors are rewarded through collaborative project delivery. The incentive of early completion is rewarded with reduction of GHGE. This positive environmental outcome, based on a dual benefit and non-price sustainability criteria, suggests a step towards changed industry practices though the use of green procurement models.
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The unsustainable and exploitative use of one of the most important but scarce resources on the planet - freshwater - continues to create conflict and human dislocation on a grand scale. Instead of witnessing nation-states adopting more equitable and efficient conservation strategies, powerful corporations are permitted to privatise and monopolise diminishing water reservoirs based on flawed neo-liberal assumptions and market models of the ‘global good’. The commodification of water has enabled corporate monopolies and corrupt states to exploit a fundamental human right, and in the process have created new forms of criminality. In recent years, affluent industrialised nations have experienced violent rioting as protestors express opposition to government ‘freshwater taxes’ and to corporate investors seeking to privatise drinking water. These water conflicts have included unprecedented clashes with police and deaths of innocent civilians in South Africa (BBC News, 2014a); the United Nations intervention in Detroit USA after weeks of public protest (Burns, 2014); and the hundreds of thousands of people protesting in Ireland (BBC News, 2014,b; Irish Times 2015). Subsequently, the commodification of freshwater has become a criminological issue for water-abundant rich states, as well as for the highly indebted water-scarce nations.
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Motivation Extracellular vesicles (EVs) are spherical bilayered proteolipids, harboring various bioactive molecules. Due to the complexity of the vesicular nomenclatures and components, online searches for EV-related publications and vesicular components are currently challenging. Results We present an improved version of EVpedia, a public database for EVs research. This community web portal contains a database of publications and vesicular components, identification of orthologous vesicular components, bioinformatic tools and a personalized function. EVpedia includes 6879 publications, 172 080 vesicular components from 263 high-throughput datasets, and has been accessed more than 65 000 times from more than 750 cities. In addition, about 350 members from 73 international research groups have participated in developing EVpedia. This free web-based database might serve as a useful resource to stimulate the emerging field of EV research. Availability and implementation The web site was implemented in PHP, Java, MySQL and Apache, and is freely available at http://evpedia.info.
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Background Interest in the use of healing gardens in healthcare settings to provide therapeutic benefits is increasing, however insight is needed to determine whether patients, patient families and friends, and staff who spend time in these gardens use these in the manner for which they were designed, and experience the benefits suggested by broader research in this field. Objective(s) Visitors to four of the LCCH gardens have left comments in ‘bench diaries’ (visitors books). Analysis of these comments yields valuable insights into the use of the gardens, enabling reflection on the design intent and outcomes and guidance regarding how the gardens might be better utilised, as well as a basis for further investigation into the use and value of the gardens. Method(s) Comments have been coded and analysed using a thematic analysis approach to identify patterns relating to the reasons for which people appear to come to the healing gardens; benefits they appear to receive from spending time there; and features and aspects of the gardens that they appear to appreciate in particular. Only comments related to the gardens have been used in this analysis, with all comments being deidentified. Outcome/Conclusion Comments left in the Adventure Garden and Secret Garden bench diaries were used for the analysis, as Staff Garden and Babies Garden bench diary comments did not relate to the garden. There were no negative comments relating to the gardens, other than one comment requesting additional benches. The vast majority of comments expressed gratitude for the space. The four most frequently observed themes from the comments left in the Secret Garden Bench Diary indicated that they were seeking ‘time out’ from their experiences of being at the hospital, a desire for a ‘dose of nature’ (greenery, beautiful garden, etc), and fresh air, and that the garden space provided a restorative experience to them in some manner. Comments in the Adventure Garden Bench Diary related predominately to the view. Analysis of the comments emphasises the importance of gardens providing multi-sensory experiences that significantly differentiate the space from the hospital ward and provide visitors with a sense of being away, of peacefulness, and of familiarity with the outside world. Positioning gardens with prospect, and solar aspect, appears important in these regards, as does the presence of visible greenery. Adequate seating in locations that provide pleasing views appears particularly important for staff and adult visitors. Whilst comments in the Bench Diaries did not indicate direct awareness of the stress and anxiety-reducing effects that research elsewhere has found from viewing plants and nature, however these effects may underpin many of these experiences that visitors did share.
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Considering the staggering benefits of high-performance schools, it seems an obvious choice to “go green.” High-performance schools offer an exceptionally cost-effective means to enhance student learning, using on average 33 percent less energy than conventionally designed schools, and provide substantial health gains, including reduced respiratory problems and absenteeism. According to the 2006 study, Greening America's Schools, Costs and Benefits, co-sponsored by the American Institute of Architects (AIA) and Capital E, a green building consulting firm, high-performance lighting is a key element of healthy learning environments, contributing to improved test scores, reduced off-task behavior, and higher achievement among students. Few argue this point more convincingly than architect Heinz Rudolf, of Portland-Oregon-based Boora Architects, who has designed sustainable schools for more than 80 school districts in Oregon, Washington, Colorado, and Wyoming, and has pioneered the high-performance school movement. Boora's recently completed project, the Baker Prairie Middle School in Canby, Oregon is one of the most sustainable K-12 facilities in the state, and illustrates Rudolf's progressive and research-intensive approach to school design.
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叶绿素突变泛指能导致叶绿素代谢失调的核基因或叶绿体基因突变。发生叶绿素突变的植物个体普遍表现为叶色的变化,目前已报道的多数叶绿素突变体为人工诱变产物。叶绿素缺失突变导致的叶结素代谢缺陷实际上反映了叶绿体发育过程的缺陷,研究叶绿素突变更重要的意义是在于阐明叶绿体发育过程。 本研究所用材料1103s是一类特殊的叶绿素突变体,为籼性光敏核不育水稻(Oryza sativa L.)8902s群体中发现的自发突变体。该突本所具有的失绿特性为特定温度条件下才表现出来的瞬时性状,在环境温度恢复后,失绿组织可复发。遗传分析表明该突变由隐性核基因控制。本文不1103s所具有的温度敏感和失绿复绿特性,在亚细胞水平和生理化水平进行了详细的探讨。 叶绿素含量的检测表明,诱导后表现失绿的叶片组织内叶绿素含量明显降低,叶绿素a/b比值升高,原脱植基叶绿素含量低于绿色组织。失绿组织中的这种原脱植基叶绿素在失绿组织中含量的减少是由两方面因素造成的,其一是叶绿素合成过程中原脱植基叶绿素合成之前的某一步过程反应受阻;其二是原脱植基叶绿素向叶绿素转化的过程是正常进行的。 对1103s叶绿体内部的超微结构观察表明:1.控制叶绿素缺失性状的是一多效基因。该基因在特定温度条件下表达时,不仅影响到叶绿体的发育,也对细胞质中的其他细胞器产生重要的影响,其结果是细胞质中的高度有序的内膜系统被大量形状不规则的泡状结构所取代。放大后发现,这类泡状结构由(1)线粒体(2)功能未知的泡状结构I,其内部含颗粒状物质泡结构被膜内还有数层不连续的膜残片(3)功能未知的泡状结构II,其内部含大颗粒状物质。2.该突变体表达失绿和复绿过程中,叶绿体内部膜结构的变化伴随叶绿素含量的变化也有退脂和恢复的过程,但与已报道的其他突体有两个明显的不同:首先,在退化细胞的叶绿体内未观察到前片层体的存在。前片层体是叶绿体发育过程中黄化体阶段常见的非常明显的特殊结构,在电镜下为有规律的晶格状结构。已有研究表明,前片层体的形成与原脱植基叶绿素的积累有密切关系。与组培白化苗中检测到的结果不同,失绿组织中原脱植基叶绿素的含量不但没有积累,反而少于绿色组织中的含量,而造成该突变体在失绿过程中质体内无前片层体形成。其次,1103s在叶绿体退化过程中类囊体膜的变化不同于其化温敏的转绿型叶绿素突变体,尤其是在失绿过程中,其类囊体膜不是以直接解体的方式减少而是以单类囊体膜紧靠为主要特征。 对野生型 8902s与1103s类囊体膜结构的冰冻蚀刻分析表明,1103s失绿叶片上的失绿组织和绿色组织中,EFs面的大颗粒结构均异常。其异常之处表现在每个颗粒明显解离成两个亚单位(上面观),而在野生型8902s中则无上述现象出现。亚单位的解离程度在失绿组织中更明显。有间接证据研究表明,EFs面上的大颗粒代表PS II。如果该推论正确,那么失绿叶片的失绿组织和绿色组织中,PS II都可能是异常的。 另外,通过对失绿组织和绿色组织全叶蛋白双向电泳图谱的比较,得到了一个特异缺失的叶蛋白组分,该蛋白的分子量为51kd。此蛋白在失绿叶片上的失绿组织和绿色组织之间存在组织差异性。通过对该蛋白在不同温度处理和不同遗传背景下的变化规律分析,发现该蛋白是一存在于许多水稻品系叶片中的高含量组分,此蛋白表达本身不受变温诱导过程的影响,而是受另一感温过程的调控。初步分析表明该蛋白为一失绿相关蛋白。 综上所述,1103s所具有的失绿和复绿特性是核基因多效表达的结果,有一感温过程调控下游蛋白表达的复杂过程。此外,该突变特性很可能与PS II的结构异常有关。
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This response does not only include greening the campus but also transforming curricula and teaching and learning. This book explains why this is necessary and--crucially--how to do it.
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本文依据田间试验数据 ,采用Jensen模式 ,研究了黄土旱区冬小麦、春玉米这两种优势作物的—水分模型 .研究结果表明 ,小麦在播种~返青期缺水敏感指数 (λ)最大 ,对缺水最为敏感 ;拔节~抽穗期次之 ,然后是抽穗~灌浆期 ,而灌浆~成熟期和返青~拔节期的敏感性最小 .总耗水量在 32 0~ 42 0mm之间 ,灌水量为 2 6 0~ 30 0mm左右、且分布在冬前和拔节~抽穗期是节水高产高效的灌水模式 .玉米拔节 -抽穗期和抽穗 -灌浆期对缺水最敏感 ,拔节前和灌浆 -成熟期敏感性小 .说明拔节后到抽穗期补水对产量作用最大 ,其次为抽穗 -灌浆期 .这为黄土旱区制定灌溉制度提供了重要理论依据
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This paper studied the reproductive strategies of Kobresia humilis in alpine meadow about its sexual reproduction ,vegetative reproduction and reproductive efforts respectively. The results show that the seed output of Kobresia humilis is 715. 5per unit (m2) . The germination is above 60 % in fit condition ,while only about 3 % in field. There is only 16. 13 % seed which get into seed bank and remain vitality till grass greening. So the seedling is only 3. 46 per unit (m2) in field.But the new ramets of Kobresia humilis are 711. 34 unit (m2 ) from vegetative reproduction. In addition ,vegetative reproductive effort is more than sexual reproductive effort . It constitutes 93. 5 % of all reproductive efforts. Therefore ,the main reproductive strategy of Kobresia humilis is vegetative reproduction ,and sexual reproduction is secondary in alpine condition.