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Water Quality Analysis and Recommendations through Comprehensive Pollution Index Method  [cached]
Tao TANG,Yujia ZHAI,Kai HUANG
Management Science and Engineering , 2011,
Abstract: Recently, the quality of surface water has become one of significant environmental planning and management issues in China. To investigate the quality of surface water, three monitoring sites, such as Majiawan Site, Huxin Site and Huguan Site, have been established by Qilu Lake, located in the north of Tonghai County, Yuxi Region, Yunnan Province, by Chinese government. In this paper, we applied comprehensive pollution index method to analyze and monitor water quality, obtained a series of determination factors which could be used to differentiate V class and Interior V class of the water quality of Qilu Lake. Accordingly, we suggest relevant recommendations from the aspects of engineering measures, chemical and biological methods.
From biota to chemistry and climate: towards a comprehensive description of trace gas exchange between the biosphere and atmosphere
A. Arneth, S. Sitch, A. Bondeau, K. Butterbach-Bahl, P. Foster, N. Gedney, N. de Noblet-Ducoudré, I. C. Prentice, M. Sanderson, K. Thonicke, R. Wania,S. Zaehle
Biogeosciences (BG) & Discussions (BGD) , 2010,
Abstract: Exchange of non-CO2 trace gases between the land surface and the atmosphere plays an important role in atmospheric chemistry and climate. Recent studies have highlighted its importance for interpretation of glacial-interglacial ice-core records, the simulation of the pre-industrial and present atmosphere, and the potential for large climate-chemistry and climate-aerosol feedbacks in the coming century. However, spatial and temporal variations in trace gas emissions and the magnitude of future feedbacks are a major source of uncertainty in atmospheric chemistry, air quality and climate science. To reduce such uncertainties Dynamic Global Vegetation Models (DGVMs) are currently being expanded to mechanistically represent processes relevant to non-CO2 trace gas exchange between land biota and the atmosphere. In this paper we present a review of important non-CO2 trace gas emissions, the state-of-the-art in DGVM modelling of processes regulating these emissions, identify key uncertainties for global scale model applications, and discuss a methodology for model integration and evaluation.
From biota to chemistry and climate: towards a comprehensive description of trace gas exchange between the biosphere and atmosphere  [PDF]
A. Arneth,S. Sitch,A. Bondeau,K. Butterbach-Bahl
Biogeosciences Discussions , 2009,
Abstract: Exchange of non-CO2 trace gases between the land surface and the atmosphere plays an important role in atmospheric chemistry and climate. Recent studies have highlighted its importance for interpretation of glacial-interglacial ice-core records, the simulation of the pre-industrial and present atmosphere, and the potential for large climate-chemistry and climate-aerosol feedbacks in the coming century. However, spatial and temporal variations in trace gas emissions and the magnitude of future feedbacks are a major source of uncertainty in atmospheric chemistry, air quality and climate science. To reduce such uncertainties Dynamic Global Vegetation Models (DGVMs) are currently being expanded to mechanistically represent processes relevant to non-CO2 trace gas exchange between land biota and the atmosphere. In this paper we present a review of important non-CO2 trace gas emissions, the state-of-the-art in DGVM modelling of processes regulating these emissions, identify key uncertainties for global scale model applications, and discuss a methodology for model integration and evaluation.
Curriculum reform in Czech upper-secondary comprehensive Schools: Research findings and recommendations
Tomá? Janík,Petr Knecht,Petr Najvar,Michaela Pí?ová
Pedagogicka Orientace , 2011,
Abstract: Curriculum Reform in Upper-Secondary ComprehensiveSchools: Research Findings and RecommendationsAbstract: The paper presents the main research findings and recommendations concerningthe implementation of curricular reform in upper-secondary comprehensiveschools. The authors analyse ten problem areas of curricular reform, as they werecaptured in the Kvalitní kola research project. (1) There is no (shared) understandingof the key ideas and concepts of the reform; (2) Discussing the reform: participants andtheir non-voices; (3) The problem of language, of ’understanding’; (4) Doubts aboutwhat is being reformed; (5) When what-is-being-implemented has been implemented:the problem of coordination; (6) Conditions of implementation; (7) Ambiguous acceptationof the reform on the part of teachers; (8) Two-level curriculum: state-leveland school-level curriculum as the key elements of the reform; (9) Teachers makinga curriculum: doubts and hesitation; (10) Realising curriculum: formalism or a routeto the new culture of teaching and learning. Towards the end of the paper, the authorssummarise recommendations for the participants on different levels of the reform. Theyalso suggest an outlook for future research in this area.
Pyritization in the Gaojiashan Biota
YaoPing Cai,Hong Hua
Chinese Science Bulletin , 2007, DOI: 10.1007/s11434-007-0080-9
Abstract: The Late Sinian (Ediacaran) Gaojiashan Biota was a soft-bodied fossil-Lagerst tte dominated by substantial pyritized, three-dimensionally preserved tubular and conotubular fossils. Soft-tissue pyritization is extremely scarce in the fossil records, especially in the Precambrian, therefore it has very important and unique significance for the study of pyritization in the Gaojiashan Biota. Early pyritization played a pivotal role in the fossil preservation and two main factors ensured the successful pyritization of the fossils, namely rapid burial and permineralization. The former was controlled by secular storm deposition, and the latter was achieved by sufficient supply of available iron from sediments. SEM data of Conotubus demonstrate two types of preservation of the tubes (defined as type A and type B, respectively). In type A, pyritization took place relatively earlier and completely preserved both tube wall and coelom, but no detailed structure. While in type B, pyritization took place somewhat later and preserved the integrated tube wall, but partially the coelom. The size frequency distribution of the pyrite framboids suggests that pyritization took place in two different environments with entire different oxygen content.
Pyritization in the Gaojiashan Biota
CAI YaoPing,HUA Hong,
CAI
,YaoPing,HUA,Hong

科学通报(英文版) , 2007,
Abstract: The Late Sinian (Ediacaran) Gaojiashan Biota was a soft-bodied fossil-Lagerst?tte dominated by substantial pyritized, three-dimensionally preserved tubular and conotubular fossils. Soft-tissue pyritization is extremely scarce in the fossil records, especially in the Precambrian, therefore it has very important and unique significance for the study of pyritization in the Gaojiashan Biota. Early pyritization played a pivotal role in the fossil preservation and two main factors ensured the successful pyritization of the fossils, namely rapid burial and permineralization. The former was controlled by secular storm deposition, and the latter was achieved by sufficient supply of available iron from sediments. SEM data of Conotubus demonstrate two types of preservation of the tubes (defined as type A and type B, respectively). In type A, pyritization took place relatively earlier and completely preserved both tube wall and coelom, but no detailed structure. While in type B, pyritization took place somewhat later and preserved the integrated tube wall, but partially the coelom. The size frequency distribution of the pyrite framboids suggests that pyritization took place in two different environments with entire different oxygen content. Supported by National Basic Science Personnel Training Foundation (Grant No. J0630537), the National Natural Science Foundation of China (Grant Nos. 40272013, 40572015, and 40332016), Ministry of Sciences and Technology, China (Grant Nos. 2006CB806400 and 2003CB716805), Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT), Education Department of Shaanxi Province (Grant No. 03JK096) and Innovation Fund of Personnel Training Base, Department of Geology, Northwest University (Grant No. XDCXD04-02)
Manipulation of soil biota in ecological research  [PDF]
W.-M. He,Q.-G. Cui
Web Ecology (WE) , 2009, DOI: 10.5194/we-9-68-2009
Abstract: Manipulation of soil biota, such as soil sterilization, may have complex effects as they alter soil properties as well as microorganism communities. To assess the effects of such manipulation, we conducted an experiment using three sterilizing approaches, two soil types, and two plant species to identify the problems that may occur when different sterilizing approaches are used. The sterilizing treatments decreased growth of plants and resulted in large changes in soil nutrients and pH. Such effects varied with the approach followed. Our data suggest that studied effects on soil biota may be misleading if we fail to consider such changes in the soil.
A new property of absorbed diffusions  [PDF]
Nikolai Dokuchaev
Mathematics , 2000,
Abstract: We consider stochastic diffusion processes absorbed at the boundary of a domain. It is shown that there exist initial distributions which ensure a given decreasing of density of the absorbed process.
Vertebrate radiations of the Jehol Biota and their environmental background
Zhonghe Zhou,
ZHOUZhonghe

科学通报(英文版) , 2004,
Abstract: Significant progress has been made in recent years in the studies of various groups of the Jehol Biota, particularly concerning the origin of birds and their flight as well as the evolution of Early Cretaceous birds, dinosaurs,mammals, insects and flowering plants. As a result,the Jehol Biota has become well known to both the scientific
ACCUMULATION OF HEAVY METALS IN BIOTA OF VYRLYTSA LAKE  [cached]
Tetiana Bilyk,Katerina Tsurkan,Lyudmila Koren
Proceedings of National Aviation University , 2011,
Abstract: . The main task was to investigate the pollution by heavy metals of biota of Vyrlytsa Lake. Thecontents of movable forms of heavy metals in aquatic plants, fish and snails was determined by atomicabsorbtion method and were made the conclusions about general state of the water object.Keywords: heavy metals, accumulation, biota, pollution, atomic absorption spectroscopy.
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