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景观水体的活化机制研究——以成都活水公园为例 被引量:1
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作者 曾琳莉 《城市地理》 2017年第11X期203-203,共1页
活水公园是世界上首座以展示人工湿地水处理系统为主要内容、以水保护为主题的城市生态环境公园,从景观生态学的角度,分析活水公园的植物运用与水体的活化机制。该研究着重探讨其景观生态设计的方法和途径,为以后的城市公园的规划建设... 活水公园是世界上首座以展示人工湿地水处理系统为主要内容、以水保护为主题的城市生态环境公园,从景观生态学的角度,分析活水公园的植物运用与水体的活化机制。该研究着重探讨其景观生态设计的方法和途径,为以后的城市公园的规划建设提供相关借鉴。 展开更多
关键词 活水公园 景观生态学 水体活化 水生植物
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浅谈长沙市南托港河道黑臭水体治理 被引量:2
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作者 曹祎程 易境 《低碳世界》 2017年第34期15-16,共2页
城市水体生态环境既对人民的日常生活起着至关重要的作用,又和国民经济的可持续发展密切相关。本文以长沙市天心区南托港黑臭河道治理工程为依托,阐述了黑臭水体的成因、综合治理的一些设计理念及治理方法,可为其他黑臭水体的治理提供... 城市水体生态环境既对人民的日常生活起着至关重要的作用,又和国民经济的可持续发展密切相关。本文以长沙市天心区南托港黑臭河道治理工程为依托,阐述了黑臭水体的成因、综合治理的一些设计理念及治理方法,可为其他黑臭水体的治理提供参考。 展开更多
关键词 黑臭水体 综合治理 水体微生物活化技术 生态修复
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Diurnal Changes of Rubisco and RCA Activities and Their Cellular Localization in Rice 被引量:2
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作者 王妮妍 蒋德安 +2 位作者 洪健 张峰 翁晓燕 《Acta Botanica Sinica》 CSCD 2003年第9期1076-1083,共8页
The cellular localization of Rubisco and Rubisco activase (RCA) in rice (Oryza sativa subsp. indica cv. Zhenong 952) leaf was investigated with immunogold-labeled electron microscope techniques on the basis of determi... The cellular localization of Rubisco and Rubisco activase (RCA) in rice (Oryza sativa subsp. indica cv. Zhenong 952) leaf was investigated with immunogold-labeled electron microscope techniques on the basis of determining the diurnal changes of photosynthetic rate (Pn), Rubisco and RCA activities, and quantifying two enzyme contents in the leaf with immuno-diffusion method in order to understand why RCA activity decreased in the midday when its contents was high. The results showed that Rubisco mainly was located in chloroplast, and RCA were found both in chloroplast and mitochondria. The lowering of Rubisco in chloroplast as well as Rubisco activity at noon could be one of good reasons to explain the photosynthetic midday depression in leaf. The density of RCA in chloroplast reached the maximum at 14:00 and a valley at 11:00. The result much coincided with the activity of RCA in leaf. In mitochondria, the density of RCA changed abruptly in one day with the highest at 13:00 and it can well elucidate why the activities of Rubisco declined at noon when its amount was increasing. Therefore the cellular localization and/or distribution of Rubisco and RCA during a day is more important for Pn, Rubisco and RCA activities. 展开更多
关键词 diurnal changes RUBISCO Rubisco activase LOCATION CHLOROPLAST MITOCHONDRIA
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镁硼硅晶膜改性技术对镍-磷复合镀层组织性能的影响 被引量:1
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作者 王昕阳 刘谦 +3 位作者 迟长啸 黄燕滨 杨鹤 张志刚 《装备环境工程》 CAS 2021年第9期119-124,共6页
目的通过研究镁硼硅晶膜改性技术对镍-磷复合镀层组织性能的影响,开发并提升工业应用价值较高的非晶态镍-磷镀层。方法采用镁硼硅晶膜改性处理技术,在45#钢基材上制备Ni-P化学镀层,通过扫描电子显微镜等设备,检测处理后镀层的微观形貌... 目的通过研究镁硼硅晶膜改性技术对镍-磷复合镀层组织性能的影响,开发并提升工业应用价值较高的非晶态镍-磷镀层。方法采用镁硼硅晶膜改性处理技术,在45#钢基材上制备Ni-P化学镀层,通过扫描电子显微镜等设备,检测处理后镀层的微观形貌、组织结构和耐磨耐蚀性能,结合镁硼硅水体活化表征,分析镁硼硅晶膜改性技术对镍-磷镀层的强化机理。结果相比传统的Ni-P镀层,镁硼硅改性晶膜处理的Ni-P镀层表面平整,分布均匀,表面致密度明显提升,摩擦因数减小了约32%,腐蚀电位正移221 mV,腐蚀电流为原来的1/2,腐蚀质量损失速率明显较低,耐腐蚀性能更为优异。经过镁硼硅改性晶膜处理的水体分子团明显减小,活性提升,这说明经过处理后的水体易于溶解来自复合陶瓷中的硅石和硼素等物质,在Ni-P镀层形成致密的晶膜,提高镀层的综合防护性能。结论经过镁硼硅晶膜改性处理后,Ni-P镀层表面致密度和耐磨耐蚀性能有了明显的提升,具有更为宽广的工业应用价值。 展开更多
关键词 镍-磷复合镀层 镁硼硅晶膜改性技术 水体活化 耐磨耐蚀性能 微观形貌
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佛山市顺德区桂畔海河水系综合整治措施 被引量:3
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作者 揭小锋 《环境与发展》 2017年第3期50-52,共3页
随着社会经济飞速发展和人口增加不可避免的带来了污染的问题,大量的生活及工业污废水未经处理就近排入河涌,导致原本作为排洪以及灌溉功能的河涌被污染,涌水发黑发臭。各支涌的污水汇入桂畔海河等主干河流造成了大范围的污染。本文对... 随着社会经济飞速发展和人口增加不可避免的带来了污染的问题,大量的生活及工业污废水未经处理就近排入河涌,导致原本作为排洪以及灌溉功能的河涌被污染,涌水发黑发臭。各支涌的污水汇入桂畔海河等主干河流造成了大范围的污染。本文对佛山市顺德区桂畔海河水系综合整治工程措施进行了概况性介绍,为今后黑臭水体治理提供借鉴和参考。 展开更多
关键词 桂畔海河水系 黑臭水体 截污 水体活化 综合整治
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Ac/Ds Transposition Activity in Transgenic Rice Population and DNA Flanking Sequence of Ds Insertion Sites 被引量:6
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作者 朱正歌 付亚萍 +4 位作者 肖晗 胡国成 斯华敏 于永红 孙宗修 《Acta Botanica Sinica》 CSCD 2003年第1期102-107,共6页
The Agrobacterium mediated transgenic rice ( Oryza saliva L.) population with inserts of maize transposon Activator/Dissociation (Ac/Ds) was investigated. DNA sequences flanking the T-DNA were analyzed with inverse PC... The Agrobacterium mediated transgenic rice ( Oryza saliva L.) population with inserts of maize transposon Activator/Dissociation (Ac/Ds) was investigated. DNA sequences flanking the T-DNA were analyzed with inverse PCR. Results showed that 65.4% of the T-DNA was integrated in different locations of rice genome, and some T-DNA flanking sequences were located on certain chromosomes. A number of T-DNA was found to have inserted into protein coding regions. In order to induce transposition of the inserted Ds elements, 354 crosses of Ac x Ds and Ds x Ac were constructed. The excision frequency of Ds element trans-activated by Ac transposase was 22.7% in the F-2 populations, and the transposition was confirmed with analyses of DNA sequences flanking the Ds elements. In addition to the transposition due to 'cut-paste' mechanism, Ds can replicate itself and integrate into a new locus, and inaccurate excisions were also found. A proportion of DNA segments flanking the Ds elements showed no homologies to sequences published in GenBank, of which two were registered under the accession numbers AF355153 and AF355770. The strategy of using transposon tagging for rice genomics study was discussed. 展开更多
关键词 transposon Ac/Ds transposition activity flanking sequence Oryza sativa
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Hydrothermal synthesis of monodisperse Zn_(x)Cd_(1-x)S spheres and their photocatalytic properties 被引量:1
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作者 贾志方 王富民 辛峰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第8期1767-1772,共6页
Monodisperse ZnxCd1-xS spheres were successfully fabricated with a high yield by a facile hydrothermal route.The as-prepared samples were characterized by X-ray diffractometry,scanning electron microscopy and UV-vis d... Monodisperse ZnxCd1-xS spheres were successfully fabricated with a high yield by a facile hydrothermal route.The as-prepared samples were characterized by X-ray diffractometry,scanning electron microscopy and UV-vis diffusion reflectance spectroscopy.The results indicate that all the prepared samples have the same hexagonal wurtzite phase and exhibit good size uniformity and regularity.Degradation of rhodamine-B(RhB) was used to evaluate the photocatalytic activities of ZnxCd1-xS samples.Zn0.4Cd0.6S possessed the best photocatalytic activity and exhibited high stability during the reaction. 展开更多
关键词 monodisperse ZnxCd1-xS spheres hydrothermal synthesis solid solution photocatalytic activity
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Buffer anion effects on water oxidation catalysis: The case of Cu(Ⅲ) complex 被引量:1
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作者 Qifa Chen Haoyi Du Mingtian Zhang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第8期1338-1344,共7页
Water oxidation is the bottleneck of artificial photosynthesis.Since the first ruthenium-based molecular water oxidation catalyst,the blue dimer,was reported by Meyer’ s group in 1982,catalysts based on transition me... Water oxidation is the bottleneck of artificial photosynthesis.Since the first ruthenium-based molecular water oxidation catalyst,the blue dimer,was reported by Meyer’ s group in 1982,catalysts based on transition metals have been widely employed to explore the mechanism of water oxidation.Because the oxidation of water requires harsh oxidative conditions,the stability of transition complexes under the relevant catalytic conditions has always been a challenge.In this work,we report the redox properties of a CuⅢ complex(TAML-CuⅢ] with a redox-active macrocyclic ligand(TAML) and its reactivity toward catalytic water oxidation.TAML-CuⅢ displayed a completely different electrochemical behavior from that of the TAML-CoⅢ complex previously reported by our group.TAML-CuⅢ can only be oxidized by one-electron oxidation of the ligand to form TAML·+-CuⅢand cannot achieve water activation through the ligand-centered proton-coupled electron transfer that takes place in the case of TAML-CoⅢ.The generated TAML·+-CuⅢ intermediate can undergo further oxidation and ligand hydrolysis with the assistance of borate anions,triggering the formation of a heterogeneous B/CuOx nanocatalyst Therefore,the choice of the buffer solution has a significant influence on the electrochemical behavior and stability of molecular water oxidation catalysts. 展开更多
关键词 Artificial photosynthesis Water oxidation Redox-active ligand Copper catalyst Buffer anion effect
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Effect of cations on thermal properties of montmorillonite
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作者 CHAI Mao LI Chunxiao +1 位作者 JIANG Wei DU Fengzhi 《Global Geology》 2013年第2期88-93,共6页
Based on comparison and analysis on structural cations of montmorillonite in bentonite samples collected from several typical areas in Jilin Province, relationships among type and quantity of interlayer/tetrahedral/oc... Based on comparison and analysis on structural cations of montmorillonite in bentonite samples collected from several typical areas in Jilin Province, relationships among type and quantity of interlayer/tetrahedral/octahedral cations and temperature and activation energy of removal of bound and hydroxyl water were investigated. The results show that the interlayer cations not only play decisive roles on removal temperature of bound water, but also influence dehydroxylation temperature and activation energy of montmorillonite. Type of octahedral cations also has an effect on dehydroxylation process. 展开更多
关键词 MONTMORILLONITE CATION interlayer water structural water
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Study on Volume Strain Inversion from Water Level Change of Well-aquifer Systems
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作者 Yan Rui Gao Fuwang Chen Yong 《Earthquake Research in China》 2008年第1期82-88,共7页
Based on linear poroelasfic and hydrogeology theory, a mathenmatical expression describing the relationship between water level clmnge and aquifer volume strain is put forward. Combined with earth tidal theory, we ana... Based on linear poroelasfic and hydrogeology theory, a mathenmatical expression describing the relationship between water level clmnge and aquifer volume strain is put forward. Combined with earth tidal theory, we analyze the response characteristics from well-aquifer water level change to earth tide of volume strain and present a method of volume strain inversion from water level clmnge. Comparing the results of inversion with real observed data, we found that there is a good consistency. This suggests that the method of volume strain inversion from water level clmnge is proper. It will offer a reference for learning about hydrogeology characteristics, volume strain and searching for precursor anomalies. 展开更多
关键词 Well-aquifer system Water level tide Volume strain INVERSION
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STUDY ON CARRIER PURIFICATION TECHNOLOGY FOR HYDRAULIC OIL
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作者 张晞 《Journal of China University of Mining and Technology》 1996年第2期69-73,共5页
The surface feature of contaminative oil is analysed and the theory of carrier purification technology for hydraulic oil is put forward. Experiments have been done in laboratory. The main performance of the purified o... The surface feature of contaminative oil is analysed and the theory of carrier purification technology for hydraulic oil is put forward. Experiments have been done in laboratory. The main performance of the purified oil has got to a level of new oil. 展开更多
关键词 hydraulic oil are getting carrier PURIFICATION
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Multidimensional Analysis of Social Convergence Within the European Union Countries
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作者 Agnieszka Giodowska 《Chinese Business Review》 2016年第3期103-114,共12页
Social convergence is one of the most important objectives for European integration. It is understood as a process of cohesion and assimilation of countries in the area of social development, which is the conditions a... Social convergence is one of the most important objectives for European integration. It is understood as a process of cohesion and assimilation of countries in the area of social development, which is the conditions and standards of living of the citizens of the European countries (EU27). The aim of the article was to investigate whether there is convergence or divergence in the EU27 area, taking into account multidimensional analysis of social convergence. Methodology used in the article was taxonomic and statistical tool. It allowed applying the synthetic approach to the issue. The time taken into consideration was the period of 2000-2013. The article showed that the area of the EU27 is very diversified in terms of social development. It allows indicating five groups of countries similar to each other due to the level of social development, although the differences among the groups are significant. The analysis of convergence led to the conclusion that the process of "catching up" occurred until 2007. Then this process has stopped and even divergence trends are visible due to crisis 2008/2009. The period of 2008-2011 revealed the greatest disparities of development among the EU countries. 展开更多
关键词 social convergence income convergence taxonomic measure of development the European Union
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Tsingtao li stone community management present situation analysis
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作者 Chen Chen Shi Menglin 《International English Education Research》 2015年第6期65-67,共3页
In China, the country with a large population, the number of rural residents still occupies a considerable proportion. With the development of the country, reducing the living standards of the gap between urban and ru... In China, the country with a large population, the number of rural residents still occupies a considerable proportion. With the development of the country, reducing the living standards of the gap between urban and rural areas as soon as possible, to be able to realize urban and rural integration, a new rural community management is a very good choice. In this paper, the research aims to Tsingtao li stone community the brief analysis of the present situation of community management, research on the current situation of community management problems, and put forward the community management services to long-term healthy development of the constructive Suggestions and countermeasures. 展开更多
关键词 Tsingtao Lee stone community Community managemen Analysis of the situation
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