图书馆环境污染及其防治     

王利君 《当代图书馆》2006,(2):57-59

图书馆内污染物按性质分为化学性污染物、物理性污染物、生物性污染物和放射性污染物。本文按此分类对图书馆内主要污染物的来源、危害和防治进行分析。  相似文献   

Development of a chemically defined medium for Planctopirus limnophila to increase biomass production     

《Electronic Journal of Biotechnology》2021

BackgroundPlanctomycetes is a phylum of biofilm-forming bacteria with numerous biosynthetic gene clusters, offering a promising source of new bioactive secondary metabolites. However, the current generation of chemically defined media achieves only low biomass yields, hindering research on these species. We therefore developed a chemically defined medium for the model organism Planctopirus limnophila to increase biomass production.ResultsWe found that P. limnophila grows best with a 10 mM sodium phosphate buffer. The replacement of complex nitrogen sources with defined amino acid solutions did not inhibit growth. Screening for vitamin requirements revealed that only cyanocobalamin (B12) is needed for growth. We used response surface methodology to optimize the medium, resulting in concentrations of 10 g/L glucose, 34 mL/L Hutner’s basal salts, 23.18 mM KNO₃, 2.318 mM NH₄Cl and 0.02 mg/L cyanocobalamin. The analysis of amino acid consumption allowed us to develop a customized amino acid solution lacking six of the amino acids present in Aminoplasmal 10%. Fed-batch cultivation in a bioreactor using the optimized medium achieved a final ΔOD₆₀₀ of 46.8 ± 0.5 after 108 h, corresponding to a cell dry weight of 13.6 ± 0.7 g/L.ConclusionsThe optimized chemically defined medium allowed us to produce larger amounts of biomass more quickly than reported in earlier studies. Further research should focus on triggering P. limnophila biofilm formation to activate the gene clusters responsible for secondary metabolism.How to cite: Kruppa OC, Gerlach D, Fan R, et al. Development of a chemically defined medium for Planctopirus limnophila to increase biomass production. Electron J Biotechnol 2021;54. https://doi.org/10.1016/j.ejbt.2021.09.002.  相似文献   

环境艺术设计专业在高职教育中的发展     

靳鹤琳 《天津职业院校联合学报》2007,9(5):100-102

通过对环境艺术设计在高职教育中的专业设置介绍,提出要培养环境艺术设计技能型人才就必须加强专业教学建设与改革,并对该专业的未来的发展趋势进行了分析。  相似文献   

Reexamining Fear Appeal Models from Cognitive Appraisal Theory and Functional Emotion Theory Perspectives     

Jiyeon So  Kai Kuang  Hyunyi Cho 《Communication monographs》2016,83(1):120-144

Recognizing inconsistencies between the extant fear appeal theories and emotion literature, this research integrated cognitive appraisal theory and functional emotion theory into a fear appeal literature and proposed a model that describes a process through which both fear and anxiety can contribute to adaptive responses. Findings from an experiment (N = 927) supported the predictions. Fear and anxiety emerged as distinct constructs. Perceived susceptibility was a stronger predictor of anxiety than fear, while perceived severity was a stronger predictor of fear than anxiety. In addition, greater fear and anxiety led to greater response efficacy through increased motivation to obtain protection-related information and heightened attention to such information, thus mediating the threat and coping appraisal processes. The SEM model testing the predictions showed that perceived susceptibility had the strongest total effects on protection intention, followed by anxiety, perceived severity, and fear.  相似文献   

环境保护——绿色教育的目标与实践     

江华勋 《贵州教育学院学报》2006,22(5):23-25,29

人类面临着环境恶化和生态危机等一系列的世界性难题,因此,加强环境教育,迫在眉睫。必须重视环境保护,加强环境教育,建立绿色学校,让环保意识深入人心。  相似文献   

新疆城市环境与生态问题     

韩桂兰 《中国教育研究与创新》2005,2(12):20-21

本文主要论述了自然扬尘污染、水资源污染、土地资源的污染对新疆城市环境和生态环境的危害和造成的直接影响，最后提出了解决新疆城市环境与生态问题。  相似文献   

化学发光分析在环境分析和药物分析中的应用     

杨季冬 《涪陵师范学院学报》2001,17(4):105-110

化学发光作为一种分析方法已有几十年的历史。近几年来化学发光分析在环境科学和生命科学领域的应用进展迅速。中评述化学发光在环境和药物分析中的应用，及化学发光与其它分析技术的联用，日渐拓宽分析应用范围。  相似文献   

Socio-Scientific Discussions as a Way to Improve the Comprehension of Science and the Understanding of the Interrelation between Species and the Environment     

Carolina Castano 《Research in Science Education》2008,38(5):565-587

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Growing up in a tourist destination: developing an environmental sensitivity     

Antonia Canosa  Anne Graham  Erica Wilson 《Environmental Education Research》2020,26(7):1027-1042

Abstract

This paper explores how the socio-cultural milieu of a community may foster a sense of environmental stewardship among children and young people. Ethnographic fieldwork, carried out in a popular tourist destination in Australia, revealed that the overt impacts of tourism activity such as littering provoke negative feelings among children and young people; these perceptions can in turn translate into a sensitivity towards the environment. While debated in some circles, a Significant Life Experiences (SLE) lens is useful in understanding children and young people’s lived experiences of – and sensitivity to - environmental issues in the communities where they are raised. SLE is employed in this article to explore how a sense of stewardship towards the environment is developed among children and young people growing up in a tourist destination. Findings suggest they actively contribute to protecting the environment in a variety of ways from regular beach clean ups and educating visiting tourists to participating in rallies and anti-development protests.  相似文献   

新农村建设中的资源开发与环境保护——以湖北省保康县马桥镇尧治河村为例     

张来斌 《襄樊学院学报》2011,32(10):5-9

我国新农村建设中资源开发与环境保护存在的主要问题是资源开采规模普遍较小,环保措施不到位;过度开发,不注重生态平衡;只顾初级开采,忽视深度开发、轻视加工利用,无可持继发展规划;开发产生的"三废",形成新的污染源。问题产生的根源是认识不足;缺乏有效的政策和法律体系;资源开发利用缺乏总体规划;尚未形成政府推动、市场驱动、公众行动的运行机制。应该从建立统筹城乡与区域的资源开发与环境保护管理机制;建立合理的循环经济模式;做强加工业,提高资源的循环利用率;调整农村产业结构、扩大就业、实现农民增收;加快立法进程,加大执法力度;加强宣传教育、增强农民环保意识;坚持从"九节一减"等方面来解决我国新农村建设中资源开发与环境保护问题。  相似文献