Biogas flow meter cost | Find two English literature on water hyacinth | Flow meter distributor

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1. Information on the storage and transportation of light hydrocarbons in natural gas

Natural gas is a gaseous fossil fuel mainly composed of methane. It mainly exists in oil fields and natural gas fields, with a small amount also found in coal seams. When non fossil organic matter undergoes anaerobic decay, it produces methane rich gas, which is called biogas. The sources of biogas include swamps between forests and grasslands, landfills, sludge in sewers, and manure, which are produced by anaerobic decomposition of bacteria. Biogas also includes gastrointestinal distension (such as farts), which most commonly comes from livestock such as cows and sheep. When methane escapes into the atmosphere, it will be a greenhouse gas that directly contributes to the worsening of global warming. This scattered methane will be regarded as a pollutant rather than a useful energy source. However, once methane in the atmosphere oxidizes with ozone, it becomes carbon dioxide and water, so the greenhouse effect caused by methane emissions is relatively short-lived. And in terms of combustion, natural gas produces much less carbon dioxide than coal and other Carboniferous fuels. The important biological sources of methane are termites, ruminants (such as cows and sheep), and human cultivation of land. It is estimated that the annual emissions of these three are 1

5, 75, and 100 million tons respectively (the total annual emissions are about 100 million tons).

2. Please find two English literature articles about water hyacinth

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（1）Water hyacinth(Eichhornia crassipes),which has been listed in the firstblacklistof biological i

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nvasion spe-cies in China,is a free-floating aquatic plant species originated from South American,with various growth habitsunder differentenvironmental conditi…　　In order to reveal the adaptation of water hyacinth at different acidity conditions,a six-week experiment, using mesocosm tanks with Hoagland"s solutions,was set up in a greenhouse to investigate the adaptation of the plant exposed to different acidity conditions(pH 3.5,5.0,7.0,9.0 and 11.0).The results showed that water hyacinth was able to grow in hydroponic solution at pH from 3.5 to 11.0.The relative growth rates of the plant ranged from 6.12 to 3.08 and declined as the pH level increased.Plant height,leafstalk length,leaf length,leaf width and leaf thickness of water hyacinth did not vary significantly at the range of pH 3.5 to 9.0,while root length,stolon length and root vigor declined obviously with the increasing pH.Bio-chemical analysis showed that soluble protein decreased and malondildehyde (MDA) contents changed slightly in leaves,but no significant difference was found among the five treatments.However,at basic conditions,the higher CAT,POD activities and MDA contents,as well as the imbalance between CAT,POD and SOD in roots were found,implying that the plant could not remove activated oxygen successfully and injured by radicals.The higher root vigor and relative growth rates of water hyacinth at acidic conditions than base one suggested that the plant preferred to acidic conditions.As a result,the survial of water hyacinth at a large range of pH and preferred to acidic conditions must be one of key factors for its spreading out the aquatic system in south China.　　【Keyword】：water hyacinth(Eichhornia crassipes); acidity stress; root vigor; superoxid

Biogas flow meter cost | Find two English literature on water hyacinth | Flow meter distributor

1. Information on the storage and transportation of light hydrocarbons in natural gas

2. Please find two English literature articles about water hyacinth

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