| 1. |
- Generosi, Johanna, et al.
(författare)
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Biogas Production in Zabrze: Closing the Cycle of Organic Waste
- 2012
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Both energy security and the demand for energy, particularly from renewable energy sources, as principle drivers, call for the investigation of renewable energy potential in Poland. The city of Zabrze, located in the Upper Silesia province and urban zone of Katowice, dedicates continuous efforts to the improvement of its waste management against the background of European Union Directives requiring the increased reuse and recycling of waste and the gradual reduction of waste being landfilled. Biogas production presents a rewarding solution by using organic waste as resource for energy production and thereby closing the loop in the life-cycle attached to organic products. This pre-feasibility study explores the potential for biogas production from pig manure and organic household waste, taking into account the prevailing local conditions in Zabrze. From a thorough data analysis, field study visits in the vicinity of Lund in Sweden and in Zabrze and adjoining communities, as well as multiple stakeholder interviews, the feasibility of a 350 kW biogas plant fed by municipal organic household waste and a base load of pig manure, with an electricity generation potential of 2.9 GWhe per year, is deduced. The report concludes that the technical implementation will need to be accompanied, in addition to continuous public awareness raising and educational endeavours, by economic measures and a supportive legal framework, both of which need to be clearly defined for a medium to long term period to allow for predictability on behalf of potential interested operators and businesses.
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| 2. |
- Lard, Mercy, et al.
(författare)
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Molecular Motor Transport through Hollow Nanowires
- 2014
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Ingår i: Nano letters (Print). - : American Chemical Society (ACS). - 1530-6984 .- 1530-6992. ; 14:6, s. 3041-3046
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Tidskriftsartikel (refereegranskat)abstract
- Biomolecular motors offer self-propelled, directed transport in designed microscale networks and can potentially replace pump-driven nanofluidics. However, in existing systems, transportation is limited to the two-dimensional plane. Here we demonstrate fully one-dimensional (1D) myosin-driven motion of fluorescent probes (actin filaments) through 80 nm wide, Al2O3 hollow nanowires of micrometer length. The motor-driven transport is orders of magnitude faster than would be possible by passive diffusion. The system represents a necessary element for advanced devices based on gliding assays, for example, in lab-on-a-chip systems with channel crossings and in pumpless nanosyringes. It may also serve as a scaffold for bottom-up assembly of muscle proteins into actin ordered contractile units, mimicking the muscle sarcomere.
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| 3. |
- Lard, Mercy, et al.
(författare)
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Nanowire-Imposed Geometrical Control in Studies of Actomyosin Motor Function
- 2015
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Ingår i: IEEE Transactions on Nanobioscience. - : IEEE. - 1536-1241 .- 1558-2639. ; 14:3, s. 289-297
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Tidskriftsartikel (refereegranskat)abstract
- Recently, molecular motor gliding assays with actin and myosin from muscle have been realized on semiconductor nanowires coated with Al2O3. This opens for unique nanotechnological applications and novel fundamental studies of actomyosin motor function. Here, we provide a comparison of myosin-driven actin filament motility on Al2O3 to both nitrocellulose and trimethylchlorosilane derivatized surfaces. We also show that actomyosin motility on the less than 200 nm wide tips of arrays of Al2O3-coated nanowires can be used to control the number, and density, of myosin-actin attachment points. Results obtained using nanowire arrays with different inter-wire spacing are consistent with the idea that the actin filament sliding velocity is determined both by the total number and the average density of attached myosin heads along the actin filament. Further, the results are consistent with buckling of long myosin-free segments of the filaments as a factor underlying reduced velocity. On the other hand, the findings do not support a mechanistic role in decreasing velocity, of increased nearest neighbor distance between available myosin heads. Our results open up for more advanced studies that may use nanowire-based structures for fundamental investigations of molecular motors, including the possibility to create a nanowire-templated bottom-up assembly of 3D, muscle-like structures.
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| 4. |
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| 5. |
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| 6. |
- Mundaca, Luis, et al.
(författare)
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Exploring the effects of ‘Green Energy Economy’ policies for transforming the Swedish building stock
- 2013
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Ingår i: [Host publication title missing].
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Konferensbidrag (refereegranskat)abstract
- Following the 2008–2009 global financial crisis, ‘green energy economy’ packages have been implemented to stimulate sustainable economic growth in several Organisation for Economic Co-operation and Development (OECD) countries. Clearly focused on the energy sector, these packages typically include energy-efficiency policy measures and aim to encourage the transition towards a low-carbon economy. We take the Swedish single- and two-household residential sector as a case study for an ex-ante assessment of ‘green energy’ policies that target energy efficiency improvements. We use the EEB_Sweden v1.0 modelling tool to quantitatively evaluate various green energy policy scenarios. We simulate two baselines and three policy scenarios in order to predict the extent to which green policy measures (e.g. ‘Net Zero Energy Building’ regulations) can change energy use patterns. The model implemented financial and non-financial determinants of technology choice. Our results suggest that technology-specific policies (e.g. subsidies for energy-efficient windows or solar photovoltaics) are insufficient to stimulate homeowners to make radical changes. In fact, we find that microeconomic decision-makers respond much better to systemic policy instruments, in particular maximum energy thresholds for whole buildings.
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| 7. |
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| 8. |
- ten Siethoff, Lasse, 1981-, et al.
(författare)
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Molecular Motor Propelled Filaments Reveal Light-Guiding in Nanowire Arrays for Enhanced Biosensing
- 2014
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Ingår i: Nano Letters. - : American Chemical Society (ACS). - 1530-6984 .- 1530-6992. ; 14:2, s. 737-742
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Tidskriftsartikel (refereegranskat)abstract
- Semiconductor nanowire arrays offer significant potential for biosensing applications with optical read-out due to their high surface area and due to the unique optical properties of one-dimensional materials. A challenge for optical read-out of analyte-binding to the nanowires is the need to efficiently collect and detect light from a three-dimensional volume. Here we show that light from fluorophores attached along Several mu m long vertical Al2O3 coated gallium phosphide nanowires couples into the wires, is guided along them and emitted at the tip. This enables effective collection of light emitted by fluorescent analytes located at different focal planes along the nanowire. We unequivocally demonstrate the light-guiding effect using a novel method whereby the changes in emitted fluorescence intensity are observed when fluorescent cytoskeletal filaments are propelled by molecular motors along the wires. The findings are discussed in relation to nanobiosensor developments, other nanotechnological applications, and fundamental studies of motor function.
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