有关两篇论文的对比分析 
Paper 1: Long-term increases in surface water dissolved organic carbon: Observations, possible causes and environmental impacts Paper 2: An environmental risk assessment for oseltamivir (Tamiflus) for sewage works and surface waters under seasonal-influenza-and pandemic-use conditions Firstly, there is a hidden line in the paper 1, it doesn’t the conventional idea about research, it’s “Observed trends in DOC- Potential drivers of change in DOC- Analysis of AWMN data”，the line can help us grasp the subject.To fully develop a argument and state clearly the findings of study, the writer used devices for the explicit definition in introduction, Such as: Dissolved organic matter (DOM) is a ubiquitous component of natural waters operationally defined as comprising any organic compound passing through a 0.45 mm filter).Environmental science is the research domain of paper 1, large increasing in dissolved organic carbon concentrations across the UK claimed in the paper 1 really capture the real-world issues in this domain, Increases in surface water dissolved organic carbon have also occurred elsewhere in the UK, northern Europe and North America. Paper 1 was published by Environmental Pollution, paper 2 issued by the journal of ecotoxicology and environmental safety. As to the construct of papers, two papers have some similarity, including abstract, acknowledgements,references，but the part of discussion is missing compared with the paper 2, abstract and the conclusion are the essential elements of the paper, abstract is the short presentation about the content of paper , not adding interpretation and comment. conclusion is the final viewpoint drawn by the author after experiments or investigations.both abstract and conclusion commonly elaborate three aspects, 1. dissolved organic carbon (DOC) concentrations in 22 UK upland waters have increased, 2. long-term DOC increases may have wide-ranging impacts on freshwater biota, drinking water quality, coastal marine ecosystems and upland carbon balances,3 Full understanding of the significance of these increases requires further knowledge of the extent of natural long-term variability.In paper 1, the discussion is combined into the conclusion, so the discussion is not always a necessary part, and there are some differences in construct of research paper, in paper 2, article info and key words are paralleling with abstract, key words in paper 1 are under abstract. article information follows up with the title, details as follow: In terms of credibility and authority, the impact factor of paper 1 is 2.451, paper 1 is frequently cited by others, the citation frequency is 273, in contrast, the impact factor of paper 1 is 2.133, Environmental Pollution 、Ecotoxicology and Environmental Safety are the more important journals in the domain of environment science and engineering, among the similar studies as paper 1,it is on the top list of the authority.
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