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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 4 of 4 (0.054 seconds)Spelling suggestions: "subject:"natriumnitrit"" "subject:"ammoniumnitrat""
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Elektrochemische Prozesse an Eisenoberflächen bei extremen anodischen StromdichtenRosenkranz, Christian. Unknown Date (has links)
Universiẗat, Diss., 2005--Düsseldorf.
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| 2 |
Composition and source of white precipitations on the inner side of papyrus glazingsGraf, Jörg, Villmann, Beate, Schlattner, Evelyn 07 February 2023 (has links)
Traditionally papyrus fragments are stored between glass panels in many
museum collections. In most exhibits a white precipitation is formed on the inner
surface of the glazing which complicates reading and digitalization. With the help
of the present study the question of the origin and possibilities for avoiding these
precipitations should be answered. It could be shown that the precipitations
consist of the salts sodium chloride and sodium nitrate. The chloride and nitrate
ions for the salt formation stem from the papyrus whereas the sodium ions are
dissolved from the float glass. By the use of higher-quality glass such as borosilicate glass this process can be prevented or at least slowed down. Furthermore a
storage of the exhibits at relative humidities below 70 % is recommended.
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| 3 |
Biologisk reducering av nitrat och nitrit i vatten / Biologic reduce of nitrate and nitrite in waterSohlberg, Thomas January 2007 (has links)
<p>During the summer 2007 was a scrubber tested at Gruvön papper mill in Grums. The scrubber reduced NO<sub>x</sub> with 90 % in flue gas. NO<sub>x</sub> was transferred from the flue gas to a scrubber liquid as nitrate and nitrite. The scrubber liquid needs to be purified from nitrate and nitrite.</p><p> </p><p>One possible solution is to clean the scrubber liquid in Gruvön biologic cleaning construction.</p><p>Microorganisms in the biologic cleaning construction need to assimilate nitrogen. There are environments free from oxygen in the cleaning construction. Microorganisms can reduce nitrate in environments free from oxygen. </p><p> </p><p>At the implementation was a labmodel built of the two first steps from Gruvön papper mill. Wastewater was collected from Gruvön papper mill. The wastewater was dosed with salts of nitrate and nitrite and pumped into the labmodel.</p><p>The results showed that nitrate and nitrite can be reduced in content with help of the biological cleaning construction.</p>
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| 4 |
Biologisk reducering av nitrat och nitrit i vatten / Biologic reduce of nitrate and nitrite in waterSohlberg, Thomas January 2007 (has links)
During the summer 2007 was a scrubber tested at Gruvön papper mill in Grums. The scrubber reduced NOx with 90 % in flue gas. NOx was transferred from the flue gas to a scrubber liquid as nitrate and nitrite. The scrubber liquid needs to be purified from nitrate and nitrite. One possible solution is to clean the scrubber liquid in Gruvön biologic cleaning construction. Microorganisms in the biologic cleaning construction need to assimilate nitrogen. There are environments free from oxygen in the cleaning construction. Microorganisms can reduce nitrate in environments free from oxygen. At the implementation was a labmodel built of the two first steps from Gruvön papper mill. Wastewater was collected from Gruvön papper mill. The wastewater was dosed with salts of nitrate and nitrite and pumped into the labmodel. The results showed that nitrate and nitrite can be reduced in content with help of the biological cleaning construction.
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