نتایج جستجو برای: sources and sinks mass and momentum
تعداد نتایج: 16916177 فیلتر نتایج به سال:
Observations of the temporal and spatial distribution of N,.O in solution are not yet sufficient topermit quantitative assessment of the role of the ocean in the budget of atmospheric N,.O. Consideration of the global nitrogen cycle suggests hat the land should be the primary source of N20. The gas is removed in the atmosphere by photolysis and by reaction with O(•D), and there may be additiona...
Effective management of nitrateimpacted aquifers requires identifying the sources of nitrate to the aquifer, and understanding the transport and fate of nitrate within the aquifer. Source identification is crucial to effective source mitigation; conversion of residential septic systems to sewer in a rural community will be ineffective if the primary source of nitrate contamination is agricultur...
abstract birbery and corruption and other criminal and as such is one of social phenomena , and i can firmly say that society is protected and safe from harm , this is criminal . eache community is familiar with these crimes and the crime associated ( direct or indirect ) with the political economic , social , and cultural beliefs and religious issues , especially with the community . admitted...
We report on methane (CH4) stable isotope (?13C and ?2H) measurements from landfast sea ice collected near Barrow (Utqiagvik, Alaska) Cape Evans (Antarctica) over the winter-to-spring transition. These provide novel insights into pathways of CH4 production consumption in ice. found substantial differences between two sites. Sea overlying shallow shelf was supersaturated with a clear microbial o...
this dissertation has six chapter and tree appendices. chapter 1 introduces the thesis proposal including description of problem, key questions, hypothesis, backgrounds and review of literature, research objectives, methodology and theoretical concepts (key terms) taken the literature and facilitate an understanding of national security, national interest and turkish- israeli relations concepts...
Objective: In order to increase the level of performance of impact skills in martial arts, based on two main physical principles of work,-energy and impulse-momentum in analyzing these skills was done. Methods: The search of articles was carried out in specialized databases and then 31 related articles selected based on entry and exit criteria were analyzed. Results: In this study, it was spe...
increasing academic and professional language demands around the world are not a deniable fact. the purpose of this study was to investigate english language needs and communication needs of the chemistry students at master and ph.d. levels at the iranian universities. in this research, different methods were used including un-structured interview, structured interview, and two sets of question...
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