Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2010
Authors
Dag-Ragnar Blystad S. L. Nielsen A. O. Alfaro-Fernandéz Gábor Bese Dimitrinka Hristova Henryk Pospieszny Maja Ravnikar Maryjean Schenk Laura Tomassoli Christina Varveri Kari Ørstad Carl Jonas Jorge Spetz René van der VlugtAbstract
No abstract has been registered
Authors
Åsmund AsdalAbstract
No abstract has been registered
Authors
Jihong Liu Clarke Carl Jonas Jorge Spetz Sissel Haugslien Merete Dees Roar Moe Dag-Ragnar BlystadAbstract
No abstract has been registered
Authors
May Sæthre Ignace Godonou Segolene Leclerq Ghislain Tchoromi Tepa-Yotto Braima JamesAbstract
No abstract has been registered
Authors
Carl Jonas Jorge Spetz Jihong Liu Clarke Merete Dees Sissel Haugslien Roar Moe Dag-Ragnar BlystadAbstract
No abstract has been registered
Authors
John Marshall BrydenAbstract
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Authors
Nicholas Clarke Milan Gryndler Hans-Holger Liste Reiner Schroll Peter Schröder Miroslav MatuchaAbstract
The halogens, most importantly fluorine, chlorine, bromine, and iodine, occur in nature as ions and compounds, including organic compounds. Halogenated organic substances (haloorganics) were long considered purely anthropogenic products; however, they are in addition a commonly occurring and important part of natural ecosystems. Natural haloorganics are produced largely by living organisms, although abiotic production occurs as well. A survey is given of processes of formation, transport, and degradation of haloorganics in temperate and boreal forests, predominantly in Europe. More work is necessary in order to understand the environmental impact of haloorganics in temperate and boreal forest soils. This includes both further research, especially to understand the key processes of formation and degradation of halogenated compounds, and monitoring of the substances in question in forest ecosystems. It is also important to understand the effect of various forest management techniques on haloorganics, as management can be used to produce desired effects.
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No abstract has been registered
Authors
Chitralekha Nag Dasgupta J. Jose Gilbert Peter Lindblad Thorsten Heidorn Stig A. Borgvang Kari Skjånes Debabrata DasAbstract
Hydrogen production through biological routes is promising because they are environmentally friendly. Hydrogen production through biophotolysis or photofermentation is usually a two stage process. In the first stage CO2 is utilized for biomass production which is followed by hydrogen production in the second stage in anaerobic/sulfur deprived conditions in the next stage. The major challenges confronting the large scale production of biomass/hydrogen are limited not only on the performance of the photo bioreactors in which light penetration in dense cultures is a major bottleneck but also on the microbiology, biochemistry and molecular biology of the organisms. Other dependable factors include area/ volume (A/V) ratio, mode of agitation, temperature and gas exchange. Photobioreactors of different geometries are reported for biohydrogen production-Tubular, Flat plate, Fermentor type etc. Every reactor has its own advantages and disadvantages. No reactor is ideal for this purpose. Airlift, helical tubular and flat plate reactors are found most suitable with respect to biomass production. These bioreactors may be employed for hydrogen production with necessary modifications to overcome the existing bottlenecks like gas hold up, oxygen toxicity and improved agitation system. This review article attempts to focus on existing photobioreactors with respect to biomass generation and hydrogen production and the steps taken to improve its performance through engineering innovation that definitely help in the future construction of photobioreactors.