Zwitterions as alternative draw solutions in forward osmosis for application in wastewater reclamation
Lutchmiah, K. ; Lauber, L. ; Roest, K. de; Harmsen, D.J.H. ; Post, J.W. ; Rietveld, L.C. ; Lier, J.B. van; Cornelissen, E.R. - \ 2014
Journal of Membrane Science 460 (2014). - ISSN 0376-7388 - p. 82 - 90.
internal concentration polarization - pressure-retarded osmosis - driven membrane processes - anaerobic-digestion - desalination processes - molecular-dynamics - aqueous-solutions - flux behavior - solutes - energy
The draw solution is the driving force in forward osmosis (FO) processes. The reverse solute leakage of the draw solution is however a major constraint due to cost and energy requirements when reconcentrating the solutes subsequent to the FO process. Several zwitterions as draw solutions (pi approximate to 24 bar and 7 bar) were systematically investigated to enhance the FO performance and minimise the solute loss. The highly soluble zwitterions: glycine, L-proline and glycine betaine demonstrated comparable water fluxes to NaCl (similar to 5 L/m(2) h), but with significantly lower solute loss (J(s): 2.13 +/- 0.54 g/m(2) h; 1.37 +/- 0.09 g/m(2) h, 0.96 +/- 0.4 g/m(2) h respectively and J(sNaCl): 3.26 +/- 0.53 g/m(2) h), which is advantageous for cost reduction. The physico-chemical properties, charge and size played a dominant role in the flux efficiencies. The J(s)/J(v) ratios decreased with (i) a decrease in hydrophobicity and (ii) an increase in size. The FO mass transfer model verified the experimental investigations of the solute transport through the membrane. (C) 2014 Elsevier B.V. All rights reserved.
Composition of Human Skin Microbiota Affects Attractiveness to Malaria Mosquitoes
Verhulst, N.O. ; Qiu, Y.T. ; Beijleveld, H. ; Maliepaard, C.A. ; Knights, D. ; Schulz, S. ; Berg-Lyons, D. ; Lauber, C.L. ; Verduijn, W. ; Haasnoot, G.W. ; Mumm, R. ; Bouwmeester, H.J. ; Claas, F.H.J. ; Dicke, M. ; Loon, J.J.A. van; Takken, W. ; Knight, R. ; Smallegange, R.C. - \ 2011
PLoS ONE 6 (2011)12. - ISSN 1932-6203 - 7 p.
major histocompatibility complex - human axillary odor - anopheles-gambiae - mating preferences - aedes-aegypti - microflora - spectrometry - diversity - responses - selection
The African malaria mosquito Anopheles gambiae sensu stricto continues to play an important role in malaria transmission, which is aggravated by its high degree of anthropophily, making it among the foremost vectors of this disease. In the current study we set out to unravel the strong association between this mosquito species and human beings, as it is determined by odorant cues derived from the human skin. Microbial communities on the skin play key roles in the production of human body odour. We demonstrate that the composition of the skin microbiota affects the degree of attractiveness of human beings to this mosquito species. Bacterial plate counts and 16S rRNA sequencing revealed that individuals that are highly attractive to An. gambiae s.s. have a significantly higher abundance, but lower diversity of bacteria on their skin than individuals that are poorly attractive. Bacterial genera that are correlated with the relative degree of attractiveness to mosquitoes were identified. The discovery of the connection between skin microbial populations and attractiveness to mosquitoes may lead to the development of new mosquito attractants and personalized methods for protection against vectors of malaria and other infectious diseases
A putative Ca2+ and calmodulin-dependent protein kinase required for bacterial and fungal symbioses
Lévy, J. ; Bres, C. ; Geurts, R. ; Chalhoub, B. ; Kulikova, O. ; Duc, G. ; Journet, E.P. ; Ané, J.M. ; Lauber, E. ; Bisseling, T. ; Dénarié, J. ; Rosenberg, C. ; Debellé, F. - \ 2004
Science 303 (2004)5662. - ISSN 0036-8075 - p. 1361 - 1364.
nod factor transduction - medicago-truncatula - calcium spiking - nodulation - gene - responses - mutants - signal - recognition - perception
Legumes can enter into symbiotic relationships with both nitrogen-fixing bacteria ( rhizobia) and mycorrhizal fungi. Nodulation by rhizobia results from a signal transduction pathway induced in legume roots by rhizobial Nod factors. DMI3, a Medicago truncatula gene that acts immediately downstream of calcium spiking in this signaling pathway and is required for both nodulation and mycorrhizal infection, has high sequence similarity to genes encoding calcium and calmodulin-dependent protein kinases (CCaMKs). This indicates that calcium spiking is likely an essential component of the signaling cascade leading to nodule development and mycorrhizal infection, and sheds light on the biological role of plant CCaMKs.
|The Voluntary Approach to Environmental Policy
Mol, A.P.J. ; Lauber, V. ; Liefferink, J.D. - \ 2000
Oxford : Oxford University Press - ISBN 9780199241163 - 279
milieubeleid - deregulering - politiek - energie - efficiëntie - industrie - afval - etiketteren - biologische voedingsmiddelen - europa - environmental policy - deregulation - politics - energy - efficiency - industry - wastes - labelling - organic foods - europe
Epilogue : Conclusions and Policy Implications
Mol, A.P.J. ; Liefferink, J.D. ; Lauber, V. - \ 2000
In: The Voluntary Approach to Environmental Policy / Mol, Arthur P.J., Lauber, Volkmar, Liefferink, Duncan, Oxford : Oxford University Press - ISBN 9780199241163 - p. 217 - 226.
Mol, A.P.J. ; Liefferink, J.D. ; Lauber, V. - \ 2000
In: The Voluntary Approach to Environmental Policy / Mol, Arthur P.J., Lauber, Volkmar, Liefferink, Duncan, Oxford : Oxford University Press - ISBN 9780199241163 - p. 1 - 9.
|Interpreting Joint Environmental Policy-making : Between Deregulation and Political Modernization
Liefferink, J.D. ; Andersen, M.S. ; Enevoldsen, M. - \ 2000
In: The Voluntary Approach to Environmental Policy / Mol, Arthur P.J., Lauber, Volkmar, Liefferink, Duncan, Oxford : Oxford University Press - ISBN 9780199241163 - p. 10 - 31.
A Comparative Analysis of Joint Environmental Policy-making
Liefferink, J.D. ; Mol, A.P.J. - \ 2000
In: The Voluntary Approach to Environmental Policy / Mol, Arthur P.J., Lauber, Volkmar, Liefferink, Duncan, Oxford : Oxford University Press - ISBN 9780199241163 - p. 192 - 216.
|Joint environmental policy-making (JEP) : New interactive approaches in the EU and selected member states. Final report
Liefferink, J.D. ; Mol, A.P.J. ; Lauber, V. ; Hofer, K. ; Enevoldsen, M. ; Andersen, M.S. - \ 1998
Wageningen : Wageningen Universiteit (Environmental Sociology Series 11) - 102 p.
|Joint environmental policy-making: new interactive approaches in the EU and selected member states.
Liefferink, D. ; Lauber, V. ; Mol, A.P.J. - \ 1998
Wageningen : Agricultural University Wageningen
|Joint environmental policy-making in comparative perspective.
Mol, A.P.J. ; Lauber, V. - \ 1996
In: Abstract The Greening of Industry Network, Heidelberg, Germany - p. 115 - 115.