| 1. |
- Bambah, B., et al.
(författare)
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QCD GENERATORS FOR LEP
- 1989
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Ingår i: LEP Physics Workshop Geneva, Switzerland, February 20, 1989. ; , s. 143-340
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Grossman, Eitan, et al.
(författare)
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SegBo : A Database of Borrowed Sounds in the World’s Languages
- 2020
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Ingår i: Proceedings of the 12th Language Resources and Evaluation Conference. ; , s. 5316-5322
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Konferensbidrag (refereegranskat)abstract
- Phonological segment borrowing is a process through which languages acquire new contrastive speech sounds as the result of borrowing new words from other languages. Despite the fact that phonological segment borrowing is documented in many of the world’s languages, to date there has been no large-scale quantitative study of the phenomenon. In this paper, we present SegBo, a novel cross-linguistic database of borrowed phonological segments. We describe our data aggregation pipeline and the resulting language sample. We also present two short case studies based on the database. The first deals with the impact of large colonial languages on the sound systems of the world’s languages; the second deals with universals of borrowing in the domain of rhotic consonants.
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| 3. |
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| 4. |
- Zamaratskaia, Galia, et al.
(författare)
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Simultaneous determination of flavonols and phenolic acids by HPLC-CoulArray in berries common in the Nordic diet
- 2016
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Ingår i: Food Science and Technology. - : Elsevier BV. - 0023-6438 .- 1096-1127. ; 74, s. 128-134
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Tidskriftsartikel (refereegranskat)abstract
- In this study we evaluated and applied an HPLC coulometric array (HPLC-CoulArray) method for simultaneous determination of flavonols and phenolic acids in bilberry, lingonberry, cloudberry and sea buckthorn berry. Berry samples purchased from local supermarkets were freeze-dried, hydrolysed and extracted with 50% aqueous methanol containing TBHQ antioxidant and 1.2 M HCL, and analysed with HPLC-CoulArray. We found that phenolic profiles differed between berries. Quercetin was found in almost all berries, with the highest concentrations observed in lingonberry. Myricetin and isorhamnetin were only detected in bilberry and sea-buckthorn, respectively. Hydroxycinnamic acids (caffeic, ferulic, p-coumaric) were also detected in all berries, but hydroxybenzoic acids (gallic, vanillic) were not found in sea-buckthorn. Total concentration of phenolic compounds was highest in sea-buckthorn berry (270.5 mg/100 g DW), followed by bilberry (253.6 mg/100 g DW), lingonberry (219.7 mg/100 g DW) and cloudberry (121.7 mg/100 g DW). (C) 2016 Elsevier Ltd. All rights reserved.
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| 5. |
- Huvila, Isto, 1976-
(författare)
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Social aspects of the ecology of information work
- 2011
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Ingår i: Information ecology and libraries. - Bratislava : Comenius University of Bratislava. ; , s. 27-36
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The model of the ecology of information work (Huvila, 2006, 2009) describes the relation of knowledge organisation systems, or in broader sense, the relation of information infrastructures and human information work. The present paper discusses the social aspects of information work and their impact on the interplay of information infrastructures and hu- man activity. The theoretical underpinnings of the discussion build on the ecological approach of Gibson, infrastructural theory and social informa- tion theory. The concluding remarks summarise a reading of the earlier model that places a specific emphasis on foregrounding the social pro- cesses relating to the emergence of information infrastructures and their related information work patterns.
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| 6. |
- Emanuelsson, Rikard, et al.
(författare)
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Quinone based conducting redox polymers for electrical energy storage
- 2017
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Ingår i: Elektrokhimiya. - : MAIK NAUKA/INTERPERIODICA. - 0424-8570. ; 53:1, s. 11-20
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Tidskriftsartikel (refereegranskat)abstract
- Conducting redox polymers (CRPs) constitute a promising class of materials for the development of organic matter based batteries with the potential to overcome the main limitations connected to this type of rechargeable battery systems including low conductivity and dissolution problems. In this report we show that the potential of quinones can be effectively tuned into the conducting region of polypyrrole (PPy), both in water based solutions and in acetonitrile, which is a prerequisite for profitable combination of the two units. We also present a device where both anode and cathode are made from PPy substituted with different quinone pendant groups and where good rate performance is achieved without any conductivity additives thus providing support for the hypothesized synergetic effect of a conducting polymer backbone and a covalently attached redox active pendant group. This device constitutes, to the best of our knowledge, the first all-CRP based battery reported to date.
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| 7. |
- Aleksandrova, Elena V., et al.
(författare)
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Structural basis of Cfr-mediated antimicrobial resistance and mechanisms to evade it
- 2024
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Ingår i: Nature Chemical Biology. - : Springer Nature. - 1552-4450 .- 1552-4469. ; 20:7, s. 867-876
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Tidskriftsartikel (refereegranskat)abstract
- The bacterial ribosome is an essential drug target as many clinically important antibiotics bind and inhibit its functional centers. The catalytic peptidyl transferase center (PTC) is targeted by the broadest array of inhibitors belonging to several chemical classes. One of the most abundant and clinically prevalent resistance mechanisms to PTC-acting drugs in Gram-positive bacteria is C8-methylation of the universally conserved A2503 nucleobase by Cfr methylase in 23S ribosomal RNA. Despite its clinical importance, a sufficient understanding of the molecular mechanisms underlying Cfr-mediated resistance is currently lacking. Here, we report a set of high-resolution structures of the Cfr-modified 70S ribosome containing aminoacyl- and peptidyl-transfer RNAs. These structures reveal an allosteric rearrangement of nucleotide A2062 upon Cfr-mediated methylation of A2503 that likely contributes to the reduced potency of some PTC inhibitors. Additionally, we provide the structural bases behind two distinct mechanisms of engaging the Cfr-methylated ribosome by the antibiotics iboxamycin and tylosin.
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| 8. |
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| 9. |
- Beser Hugosson, Muriel, 1968-
(författare)
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Issues in Estimation and Application of Long Distance Travel Demand Models
- 2003
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Forecasts of the demand for long distance travel areessential for many decisions, such as infrastructureinvestments, operators´management policies etc. Manyresearch issues are related to this field, and the purpose ofthis thesis is to contribute to some of them. Paper I Modellingchoice of flight and booking class–a study using Stated Preference and Revealed Preference data goes into theinteresting issue of modelling departure time and ticket typechoices. The data used in the estimation process were acombination of revealed preference (RP) data and statedpreference (SP) data. A model was developed to estimaterecapture and buyup to improve the SAS (Scandinavian AirlinesSystem) yield management system. Paper II Endogenoussegmentation applied to long distance business trips in Swedenis related to the possibilities of identifying market segmentsthat differ in travel behaviour. The procedure of endogenoussegmentation has been explored to identify different tastesegments in a population. The results indicate that the methodis an efficient way of identifying market segments andoutperforms the traditional manual segmentation when modelefficiency is the objective. The restrictive assumption of independent distributed randomcomponents in the logit model utility function can be relaxedby finding a suitable nesting structure. The task ofestablishing such structures, another crucial issue in traveldemand model development, is further analysed in papers IIIExploring the HEV model to improve nesting structures of modelsfor Swedish long distance private trips and paper IV Enhancingmodel structure and treatment of incomplete geocodes in SAMPERSlong distance models. In paper III a technique to identifyscale parameters for separate alternatives is used. Based onthis, different nesting structures are tested and the resultsare compared with the old mode choice model for long distancetrips in Sweden. This paper leads to paper IV, where similarnesting structures were tested on the long distance mode anddestination choice model in the SAMPERS system. Paper IV alsodeals with data problems, as the destination coding wasincomplete. A final model formulation, related to these issuesis suggested. To turn the view a bit beside the pure estimationtechniques and structures used in the estimation of differentmodels, paper V Quantifying uncertainties in the SAMPERS longdistance forecasting model system considers uncertaintiesrelated to the fact that models are estimated on a sample of apopulation. The bootstrap method, a computer intensivestatistical method, can be used to compute statistical measuresfor very complex systems, without being bound to an analyticalapproach. The bootstrap method is applied on the SAMPERSsystem, and numerical results are presented on different modelsystem output levels.
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| 10. |
- Ciray, Ipek, et al.
(författare)
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Assessment of suspected bone metastases : CT with and without clinical information compared to CT-guided bone biopsy
- 1997
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Ingår i: Acta Radiologica. - 0284-1851 .- 1600-0455. ; 38:5, s. 890-895
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: To evaluate the role of CT with and without clinical information as compared to CT-guided bone biopsy in the assessment of suspected bone metastases. MATERIAL AND METHODS: The study comprised 51 consecutive patients with suspected bone metastases who had undergone CT-guided bone biopsies with an eccentric drill system. CT of the targets, clinical information, and histopathology were scored separately as malignant, uncertain or benign. The results of CT alone and CT in combination with clinical information were compared to the results of histopathology. RESULTS: Histopathology diagnosed 45/51 lesions (88%), 23 as malignant and 22 as benign. CT correctly depicted 17 of these 23 malignant lesions. The remaining 6 malignant lesions were CT-scored as uncertain (n = 5) or benign (n = 1). CT correctly depicted only 3 of the 22 benign lesions. The remaining 19 benign lesions were CT-scored as malignant (n = 2) or uncertain (n = 17). When uncertain CT scores were combined with clinical scores, the true-positive and true-negative results for malignancy increased from 44% to 82%. CONCLUSION: In most cases, CT in combination with clinical information gives enough information about the nature-malignant or benign-of a skeletal lesion. In uncertain cases, diagnostic accuracy can be improved by means of CT-guided bone biopsy.
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