| 1. |
- Ahlgren, Erik, 1962, et al.
(författare)
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Biokombi Rya - slutrapporter från ingående delprojekt
- 2007
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Inom projektet Biokombi Rya har ett flertal olika forskargrupper samarbetat för att studera system¬effekterna av förgasning av biobränsle ur olika aspekter. Syftet med projektet är att öka kunskapen om biobränsleförgasning i Sverige samt att utreda förutsättningar för att sådana anläggningar ska vara ekonomiskt och miljömässigt intressanta. En referensgrupp har varit kopplad till projektet där förutsättningar, resultat och slutsatser har behandlats.I denna underlagsrapport har slutrapporterna från projektets delprojekt samlats. De beskriver förutsättningar, metodansatser, använda data och resultat utförligt och utgör på så sätt ett viktigt komplement till den mer övergripande beskrivningen i projektets syntesrapport. De delrapporter som ingår har valts för att täcka in samtliga delar av projektet som är av allmänt intresse. Projektresultat som publicerats på annat sätt berörs dock mer kortfattat.Projektet Biokombi Rya har pågått under två år (2005-2006) och drivits av Chalmers EnergiCentrum. Förutom de omfattande analysinsatser som författarna till denna rapport står för, har Avdelningen för kemisk teknologi vid KTH, Siemens Industrial Turbines AB och Göteborg Energi AB bidragit med expertstöd. CIT Industriell Energianalys, med undertecknad som projektledare, har stått för projektledning och koordination.Projektet har finansierats av Energimyndigheten, Göteborg Energis forsknings¬stiftelse samt Göteborg Energi AB.
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| 2. |
- Akselsson, Roland, et al.
(författare)
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Efficient and effective learning for safety from incidents
- 2012
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Ingår i: Work. - 1051-9815 .- 1875-9270. ; 41, s. 3216-3222
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Tidskriftsartikel (refereegranskat)abstract
- Learning from incidents is important for improving safety. Many companies spend a great deal of time and money on such learning procedures. The objectives of this paper are to present some early results from a project aimed at revealing weaknesses in the procedures for learning from incidents and to discuss improvements in these procedures, especially in chemical process industries. The empirical base comes from a project assessing organizational learning and the effectiveness of the different steps of the learning cycle for safety and studying relations between safety-specific transformational leadership, safety climate, trust, safety-related behavior and learning from incidents. The results point at common weaknesses in the organizational learning, both in the horizontal learning (geographical spread) and in vertical learning (double-loop learning). Furthermore, the effectiveness in the different steps of the learning cycle is low due to insufficient information in incident reports, very shallow analyses of reports, decisions that focus at solving the problem only at the place where the incident took place, late implementations and weak solutions. Strong correlations with learning from incidents were found for all safety climate variables as well as for safety-related behaviors and trust. The relationships were very strong for trust, safety knowledge, safety participation and safety compliance.
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| 3. |
- Börjesson, Angelica, et al.
(författare)
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Politiska granskare. Den kommunala revisionens roll för politiskt ansvarsutkrävnade
- 2013
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- De kommunala revisorernas komplexa roll och deras opartiskhet i förhållande till de granskade har diskuterats under lång tid, men forskningen om institutionen har varit mycket begränsad. I denna rapport angrips kärnfrågorna i debatten om den kommunala revisionen: Hur hanterar revisorerna den diskrepans som uppstår när fullmäktige är ovillig att följa revisionens rekommendationer om ansvarsprövning och i vilken grad kan partipolitiska överväganden förklara fullmäktiges beslut i ansvarsfrågan?
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| 4. |
- Börjesson, Karl, 1982, et al.
(författare)
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A membrane anchored DNA-based energy/electron transfer assembly
- 2008
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Ingår i: Nucleic acids symposium series (2004). - 1746-8272. ; :52, s. 691-691
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Tidskriftsartikel (refereegranskat)abstract
- In this work the trapping and conversion of visible light energy into chemical energy is examined using a supramolecular assembly. This consists of a light absorbing antenna and a porphyrin redox centre both covalently attached to a DNA strand, which in turn is bound to a lipid membrane. The excitation energy is finally trapped as a benzoquinone radical anion that could potentially be used in subsequent chemical reactions.
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| 5. |
- Börjesson, Karl, 1982, et al.
(författare)
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Characterization and use of tricyclic fluorescent nucleic acid base analogues
- 2008
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Ingår i: Nucleic acids symposium series (2004). - 1746-8272. ; :52, s. 3-4
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Tidskriftsartikel (refereegranskat)abstract
- The two recently developed nucleic acid probe molecules tC and tC(O) both have unique properties compared to other molecules in the family of fluorescent base analogues.(1-5) These tricyclic base analogues both form very stable base pairs with guanine and give minimal perturbations to the native structure of DNA.(2) We have found that tC(O) is the brightest fluorescent base analogue reported(4) and that tC also is very bright and has a fluorescence quantum yield that is virtually insensitive to its surrounding microenvironment within the nucleic acid(3). These base analogues have so far been used in FRET-studies of a DNA-polymerase system(6) and in initial anisotropy-studies of DNA-containing systems(4).
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| 6. |
- Börjesson, Karl, 1982, et al.
(författare)
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Membrane-Anchored DNA Assembly for Energy and Electron Transfer
- 2009
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Ingår i: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 1520-5126 .- 0002-7863. ; 131:8, s. 2831-2839
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Tidskriftsartikel (refereegranskat)abstract
- In this work we examine the trapping and conversion of visible light energy into chemical energy using a supramolecular assembly. The assembly consists of a light-absorbing antenna and a porphyrin redox center, which are covalently attached to two complementary 14-mer DNA strands, hybridized to form a double helix and anchored to a lipid membrane. The excitation energy Is finally trapped In the lipid phase of the membrane as a benzoquinone radical anion that could potentially be used In subsequent chemical reactions. In addition, In this model complex, the hydrophobic porphyrin moiety acts as an anchor into the liposome positioning the DNA construct on the lipid membrane surface. The results show the suitability of our system as a prototype for DNA-based light-harvesting devices, In which energy transfer from the aqueous phase to the interior of the lipid membrane Is followed by charge separation. © 2009 American Chemical Society.
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| 7. |
- Börjesson, Karl, 1982, et al.
(författare)
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Nucleic Acid Base Analog FRET-Pair Facilitating Detailed Structural Measurements in Nucleic Acid Containing Systems
- 2009
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Ingår i: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 1520-5126 .- 0002-7863. ; 131:12, s. 4288-4293
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Tidskriftsartikel (refereegranskat)abstract
- We present the first nucleobase analog fluorescence resonance energy transfer (FRET)-pair. The pair consists of tC O , 1,3-diaza-2- oxophenoxazine, as an energy donor and the newly developed tC nitro , 7-nitro-1,3-diaza-2-oxophenothiazine, as an energy acceptor. The FRET-pair successfully monitors distances covering up to more than one turn of the DNA duplex. Importantly, we show that the rigid stacking of the two base analogs, and consequently excellent control of their exact positions and orientations, results in a high control of the orientation factor and hence very distinct FRET changes as the number of bases separating tC O and tCnitro is varied. A set of DNA strands containing the FRET-pair at wisely chosen locations will, thus, make it possible to accurately distinguish distance- from orientation-changes using FRET. In combination with the good nucleobase analog properties, this points toward detailed studies of the inherent dynamics of nucleic acid structures. Moreover, the placement of FRET-pair chromophores inside the base stack will be a great advantage in studies where other (biomacro)molecules interact with the nucleic acid. Lastly, our study gives possibly the first truly solid experimental support to the dependence of energy transfer efficiency on orientation of involved transition dipoles as predicted by the Forster theory. © 2009 American Chemical Society.
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| 8. |
- Börjesson, Karl, 1982, et al.
(författare)
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Nucleic acid structure and sequence probing using fluorescent base analogue tCo
- 2009
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Ingår i: Biophysical Chemistry. - : Elsevier BV. - 1873-4200 .- 0301-4622. ; 139:1, s. 24-28
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Tidskriftsartikel (refereegranskat)abstract
- The fluorescent cytosine analog tC(o) is on average the brightest probe of its kind and, moreover, it introduces minimal perturbations to the normal secondary structure of DNA. Here several ways of how tC(o), with an advantage, can be used as a local fluorescent probe in nucleic acid systems are presented. Most importantly, we show that tCo is an excellent probe for the detection of individual melting processes of complex nucleic acid structures containing a large number of separate secondary structure motifs. Since conventional UV-melting investigations merely monitor the global melting process of the whole nucleic acid structure, e.g. multi-hairpin systems in RNA/DNA, and thus is incapable of estimating individual melting transitions of such systems, tC(o) represents a new method of characterization. Furthermore, we find that tCo may be used to detect bulges and loops in nucleic acids as well as to distinguish a matched base-pair from several of the mismatched.
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| 9. |
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| 10. |
- Börjesson, Marcus
(författare)
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Examining profiles of risk within the Swedish armed forces
- 2012
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Konferensbidrag (refereegranskat)abstract
- Common characteristics among people who seek out high risk situations are tendencies towards high risk propensity and sensation seeking. Although research indicates that these tendencies can in some ways be positive for dealing with high risk situations, they also have a negative side. Thus positive relationships have been demonstrated between high sensation seeking and negative risk taking such as alcohol and drug abuse, careless driving and dangerous handling of weapons. However, the distinction between maladaptive and adaptive risk taking has been insufficiently studied both within civil and military settings. Findings from previous studies indicate that peoples inclination towards risk behavior is a rather complex phenomenon related to situation, demographic factors, traits as well as beliefs. In this paper we focus on how several of these aspects are related to each other and particularly how they are related to different dimensions of risk propensity, among a sample of Swedish military personnel. Questionnaire data were gathered from two military groups (N = 169) under contract for international missions. Preliminary results show that impulsivity and safety values constitute important explanatory factors of individual variations in risk propensity and sensation seeking. Individuals with a higher degree of risk propensity and sensation seeking tendencies seem to be characterized by a lack of deliberation as well as a skeptical attitude towards safety issues. Furthermore, different 'risk profiles' could be identified based on variations in risk propensity, impulsivity and safety values. The results highlight relevant aspects for identifying maladaptive as well as adaptive risk takers. The implications should be of interest for recruiting processes and educational communication for all professions where risks are salient and the consequences of individual mistakes are costly.
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