| 1. |
- Munthe, Christian, 1962
(författare)
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Precaution and Ethics: Handling risks, uncertainties and knowledge gaps in the regulation of new biotechnologies
- 2017
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- This volume outlines and analyses ethical issues actualized by applying a precautionary approach to the regulation of new biotechnologies. It presents a novel way of categorizing and comparing biotechnologies from a precautionary standpoint. Based on this, it addresses underlying philosophical problems regarding the ethical assessment of decision-making under uncertainty and ignorance, and discusses how risks and possible benefits of such technologies should be balanced from an ethical standpoint. It argues on conceptual and ethical grounds for a technology neutral regulation as well as for a regulation that not only checks new technologies but also requires old, inferior ones to be phased out. It demonstrates how difficult ethical issues regarding the extent and ambition of precautionary policies need to be handled by such a regulation, and presents an overarching framework for doing so.
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| 2. |
- Andersson, Helene, 1983, et al.
(författare)
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Effects of molecular weight on permeability and microstructure of mixed ethyl-hydroxypropyl-cellulose films
- 2013
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Ingår i: European Journal of Pharmaceutical Sciences. - : Elsevier BV. - 0928-0987 .- 1879-0720. ; 48:1-2, s. 240-248
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Tidskriftsartikel (refereegranskat)abstract
- Films of ethyl cellulose (EC) and water-soluble hydroxypropyl cellulose (HPC) can be used for extended release coatings in oral formulations. The permeability and microstructure of free EC/HPC films with 30% w/w HPC were studied to investigate effects of EC molecular weight. Phase separation during film spraying and subsequent HPC leaching after immersion in aqueous media cause pore formation in such films. It was found that sprayed films were porous throughout the bulk of the films after water immersion. The molecular weight affected HPC leaching, pore morphology and film permeability; increasing the molecular weight resulted in decreasing permeability. A model to distinguish the major factors contributing to diffusion retardation in porous films showed that the trend in permeability was determined predominantly by factors associated with the geometry and arrangement of pores, independent of the diffusing species. The film with the highest molecular weight did, however, show an additional contribution from pore wall/permeant interactions. In addition, rapid drying and increasing molecular weight resulted in smaller pores, which suggest that phase separation kinetics affects the final microstructure of EC/HPC films. Thus, the molecular weight influences the microstructural features of pores, which are crucial for mass transport in EC/HPC films.
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| 3. |
- Goddek, Simon, et al.
(författare)
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Aquaponics and Global Food Challenges
- 2019
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Ingår i: Aquaponics Food Production Systems. - : Springer Verlag. - 9783030159436
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Bokkapitel (refereegranskat)
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| 4. |
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| 5. |
- Fagerström, Anton, et al.
(författare)
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Economic and Environmental Potential of Large‐Scale Renewable Synthetic Jet Fuel Production through Integration into a Biomass CHP Plant in Sweden
- 2022
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Ingår i: Energies. - : MDPI AG. - 1996-1073. ; 15:3
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Tidskriftsartikel (refereegranskat)abstract
- The potential of bio‐electro‐jet fuel (BEJF) production with integration into an existing biomass‐based combined heat and power (CHP) facility was investigated. The BEJF is produced via Fischer–Tropsch (F–T) synthesis from biogenic CO2 and H2 obtained by water electrolysis. Techno-economic (TEA)‐ and life. cycle (LCA)‐ assessments were performed to evaluate the production cost and environmental impact of the BEJF production route. The BEJF mass fraction reached 40% of the total F–T crude produced. A reduction of 78% in heating demands was achieved through energy integration, leading to an increase in the thermal efficiency by up to 39%, based on the F–T crude. The total production cost of BEJF was in the range of EUR 1.6–2.5/liter (EUR 169–250/MWh). The GWP of the BEJF was estimated to be 19 g CO2‐eq per MJ BEJF. The reduction potential in GWP in contrast to the fossil jet baseline fuel varied from 44% to more than 86%. The findings of this study underline the potential of BEJF as a resource‐efficient, cost‐effective, and environmentally benign alternative for the aviation sector. The outcome is expected to be applicable to different geograph-ical locations or industrial networks when the identified influencing factors are met.
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| 6. |
- Görür, Yunus Can
(författare)
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Design of Cellulose-Based Materials via Sustainable and Scalable Processes
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Plastic pollution is one of the most pressing environmental issues in today’s world. Addressing this problem calls for the development of environmentally friendly alternatives that would reduce the amount of persistent plastic waste. Wood-based cellulose is an excellent candidate as a renewable and biodegradable alternative to oil-based plastics in a variety of applications. However, for their widespread adoption, cellulosic materials need to perform comparably to their oil-based counterparts, while simultaneously attaining similarly high processing efficiencies. A major challenge today is to produce high-performance cellulosic materials at industrially feasible rates using scalable methods. This thesis demonstrates that with a fundamental understanding of fiber chemistry and behavior, cellulose fibers can be tuned to develop sustainable material streams and advanced functional materials at high process rates. First, a new stimuli-responsive cellulosic fiber material called self-fibrillating fibers (SFFs) was developed, where the mechanisms governing the swelling of the fiber wall were thoroughly investigated. The knowledge and understanding obtained from these fundamental studies were utilized to prepare pH-responsive filters. Secondly, the preparation of SFF papers and nanopapers using conventional papermaking methods and equipment was demonstrated within the context of rapid transparent paper preparation. It was shown that SFFs can be rapidly dewatered to obtain papers, where the constituting fibers can be nanofibrillated in situ, resulting in strong, transparent and gas barrier nanopapers without sacrificing processing speed. Thirdly, the use of SFFs was extended to functional nanocomposites. A new and scalable materials processing platform for the rapid preparation of functional cellulose hybrids was developed. The stimuli-responsive self-assembly of chemically nanofibrillated SFFs was studied and utilized to prepare nanopapers and hybrid materials. Finally, SFFs were used as bio-based binders in the fabrication of graphitic Li-ion battery electrodes with improved processing and electrochemistry. Taking advantage of their facile nanofibrillation and favorable chemistry, SFFs were nanofibrillated during slurry mixing then blade-coated on copper supports to create strong electrodes with excellent performance.The novel materials and methodologies presented herein combine an aqueous fiber modification strategy with excellent processing properties for the preparation of high-performance cellulosic materials that can compete with oil-based plastics in various applications.
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| 7. |
- Johansson, Erika, 1969, et al.
(författare)
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Towards Sustainable Conservation and Use of Materials in Built Environments : Summary from the FORSCENE workshop: Industry/Economy, Vienna, October 23-24, 2006
- 2007
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Ingår i: Giljum, S., Hinterberger, F., Hammer, M. (Eds.), Report from the FORSCENE workshop Industry-Environment, Sustainable Europe Research Institute (SERI), Vienna, October 2006, Part 2..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Up until today, no comprehensive efforts have been made, and principles are yet to be established for the ‘sustainable conservation’ of the built environment – in an inter- and transdisciplinary manner, including systematic integrative modelling and an appreciation of the inherent values of already existing structures and ambiences. Existing built structures and environments are still often seen as obstacles for sustainable development. It may be argued that a more preventive and integrated approach, i.e. an early estimation and a meta-level understanding of the built environment and its processes; its critical loads, inherent qualities, values, threats, life cycles, production chains, recyclability and quantities etc., would rather promote any kind of planning for a sustained future and the proper use of materials by hindering unnecessary material flows - i.e. through their unnecessary/unsympathetic production, exploitation and/or use, that would minimise their negative impact on peoples lives and the environment. This alternative and more preventative approach - earlier the predominant way of handling urban planning, construction and development (i.e. the production and utilisation of both existing and planned for resources, e.g. by the use of high quality production technologies and crafts, processes and skills), was historically much based on the valorisation of costs of manpower, materials, traditional knowledge, techniques and low-energy modes of transportation, compared to modern circumstances. There was also a profound knowledge of economics in more general terms and a well-developed forecasting of future scenarios. Given the demands for a sustained future, it would be reasonable to assume that this knowledge and approach would have a great deal to offer also to the planning and epistemological modelling of our times.
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| 8. |
- Johansson, Erika, 1969, et al.
(författare)
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Towards Sustainable Conservation and Use of Materials in Built Environments
- 2007
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Ingår i: Giljum, S., Hinterberger, F., Hammer, M. (Eds.), Report from the FORSCENE workshop Industry-Environment, Sustainable Europe Research Institute (SERI), Vienna, October 2006, Part 2..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Up until today, no comprehensive efforts have been made, and principles are yet to be established for the ‘sustainable conservation’ of the built environment – in an inter- and transdisciplinary manner, including systematic integrative modelling and an appreciation of the inherent values of already existing structures and ambiences. Existing built structures and environments are still often seen as obstacles for sustainable development. It may be argued that a more preventive and integrated approach, i.e. an early estimation and a meta-level understanding of the built environment and its processes; its critical loads, inherent qualities, values, threats, life cycles, production chains, recyclability and quantities etc., would rather promote any kind of planning for a sustained future and the proper use of materials by hindering unnecessary material flows - i.e. through their unnecessary/unsympathetic production, exploitation and/or use, that would minimise their negative impact on peoples lives and the environment. This alternative and more preventative approach - earlier the predominant way of handling urban planning, construction and development (i.e. the production and utilisation of both existing and planned for resources, e.g. by the use of high quality production technologies and crafts, processes and skills), was historically much based on the valorisation of costs of manpower, materials, traditional knowledge, techniques and low-energy modes of transportation, compared to modern circumstances. There was also a profound knowledge of economics in more general terms and a well-developed forecasting of future scenarios. Given the demands for a sustained future, it would be reasonable to assume that this knowledge and approach would have a great deal to offer also to the planning and epistemological modelling of our times.
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| 9. |
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| 10. |
- Steinhagen, Sophie, et al.
(författare)
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Harvest time can affect the optimal yield and quality of sea lettuce (Ulva fenestrata) in a sustainable sea-based cultivation : Seasonal Cultivation of Ulva fenestrata
- 2022
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Ingår i: Frontiers in Marine Science. - : Frontiers Media SA. - 2296-7745. ; 9
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Tidskriftsartikel (refereegranskat)abstract
- Seaweed biomass is a renewable resource with multiple applications. Sea-based cultivation of seaweeds can provide high biomass yields, low construction, operation, and maintenance costs and could offer an environmentally and economically sustainable alternative to land-based cultivations. The biochemical profile of sea-grown biomass depends on seasonal variation in environmental factors, and the optimization of harvest time is important for the quality of the produced biomass. To identify optimal harvest times of Swedish sea-based cultivated sea lettuce (Ulva fenestrata), this study monitored biomass yield, morphology, chemical composition, fertility, and biofouling at five different harvesting times in April - June 2020. The highest biomass yields (approx. 1.2 kg fw [m rope]-1) were observed in late spring (May). The number and size of holes in the thalli and the amount of fertile and fouled tissue increased with prolonged growth season, which together led to a significant decline in both biomass yield and quality during summer (June). Early spring (April) conditions were optimal for obtaining high fatty acid, protein, biochar, phenolic, and pigment contents in the biomass, whereas carbohydrate and ash content, as well as essential and non-essential elements, increased later in the growth season. Our study results show that the optimal harvest time of sea-based cultivated U. fenestrata depends on the downstream application of the biomass and must be carefully selected to balance yield, quality, and desired biochemical contents to maximize the output of future sea-based algal cultivations in the European Northern Hemisphere.
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