| 1. |
|
|
| 2. |
- Özeren, Hüsamettin Deniz, et al.
(author)
-
Ranking Plasticizers for Polymers with Atomistic Simulations; PVT, Mechanical Properties and the Role of Hydrogen Bonding in Thermoplastic Starch
- 2020
-
In: ACS Applied Polymer Materials. - : American Chemical Society (ACS). - 2637-6105. ; 2:5, s. 2016-2026
-
Journal article (peer-reviewed)abstract
- Virgin biopolymers are often brittle and, therefore, need the addition of plasticizers to obtain the required mechanical properties for practical applications, e.g. in bags and disposable kitchen items. In this article, based on a combined experimental and modelling approach, it is shown that it is possible to rank molecules with respect to their plasticization efficiency (depression in glass transition temperature with PVT data and reduced stiffness and strength) using molecular dynamics simulations. Starch was used as the polymeric matrix material due to its promising potential as a sustainable, eco-friendly, biobased replacement for fossil-based plastics. Three polyols (glycerol, sorbitol and xylitol), two ethanolamines and glucose were investigated. The results indicate that molecular simulations can be used to find the optimal plasticizer among a set of candidates, or to design/identify better plasticizers in a complex polymer system. Glycerol was the most efficient of the six plasticizers, explained by it forming the least amount of hydrogen bonds, having the shortest hydrogen bond lifetimes and low molecular rigidity. Hence, not only was it possible to rank plasticizers, the ranking results could also be explained by the simulations.
|
|
| 3. |
- Pinho, L., et al.
(author)
-
Temperature dependence of the relationship between pCO(2) and dissolved organic carbon in lakes
- 2016
-
In: Biogeosciences. - : COPERNICUS GESELLSCHAFT MBH. - 1726-4170 .- 1726-4189. ; 13:3, s. 865-871
-
Journal article (peer-reviewed)abstract
- The relationship between the partial pressure of carbon dioxide (pCO(2)) and dissolved organic carbon (DOC) concentration in Brazilian lakes, encompassing 225 samples across a wide latitudinal range in the tropics, was tested. Unlike the positive relationship reported for lake waters, which was largely based on temperate lakes, we found no significant relationship for low-latitude lakes (< 33 degrees), despite very broad ranges in both pCO(2) and DOC levels. These results suggest substantial differences in the carbon cycling of low-latitude lakes, which must be considered when upscaling limnetic carbon cycling to global scales.
|
|
| 4. |
- Abdallah, J, et al.
(author)
-
Bose-Einstein correlations in W+W- events at LEP2
- 2005
-
In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 44:2, s. 161-174
-
Journal article (peer-reviewed)abstract
- Bose-Einstein correlations (BEC) between final state particles in the reaction e(+)e(-) -> W+ W- -> q(1)(q(2)) over barq(3)(q(4)over bar>) over bar) have been studied. Data corresponding to a total integrated luminosity of 550 pb(-1), recorded by the DELPHI detector at centre-of-mass energies ranging from 189 to 209 GeV, were analysed. An indication for inter-W BEC between like-sign particles has been found at the level of 2.4 standard deviations of the combined statistical and systematic uncertainties.
|
|
| 5. |
- Adrian, Maria, et al.
(author)
-
Research protocol for mechanical complications after central venous catheterisation : a prospective controlled multicentre observational study to determine incidence and risk factors of mechanical complications within 24 hours after cannulation
- 2019
-
In: BMJ Open. - : BMJ. - 2044-6055. ; 9:10, s. 029301-029301
-
Journal article (peer-reviewed)abstract
- INTRODUCTION: Central venous catheterisation is a common procedure in intensive care therapy and the use of central venous catheters is essential for treatment of many medical disorders. Although rare, central venous catheterisation is associated with mechanical complications that can be life-threatening if untreated. Real-time ultrasound guidance reduces the incidence of mechanical complications when compared with the anatomic landmark method. The purpose of this study is to determine the incidence of and potential risk factors associated with early mechanical complications of central venous catheterisation in an era where real-time ultrasound guidance has become clinical practice. METHODS AND ANALYSIS: This is a prospective, controlled, multicentre, observational study. All participating hospitals follow the same clinical guidelines for central venous catheterisation. Each central venous catheter insertion will be recorded in the common electronic chart system according to a recently revised template. An automated script-based search will identify all recorded central venous catheter insertion templates during the study period and relevant variables will be extracted. Outcome measures and independent variables are pre-defined in this study protocol. Multivariable and univariable logistic regression analysis will be used to determine associations and risk factors of mechanical complications. ETHICS AND DISSEMINATION: The Regional Ethical Review Board in Lund, Sweden has approved this study. The results will be submitted for publication in peer-reviewed medical journals and presented at national and international scientific meetings. TRIAL REGISTRATION NUMBER: NCT03782324.
|
|
| 6. |
-
Asian Environment : Connections across Borders, Landscapes, and Times
- 2014. - 3
-
Editorial collection (peer-reviewed)abstract
- This issue of RCC Perspectives offers insights into similarities and differences in the ways people in Asia have tried to master and control the often unpredictable and volatile environments of which they were part. In these histories, nonhuman actors such as capricious rivers, fluid delta regions, monsoon rains, and wild animals play an important role. In some instances, the power of nature facilitated colonial rule and exploitation; in others, it helped to subvert political control. The essays gathered here present new environmental scholarship that speaks across political boundaries, draws new connections between regions and time periods, and tells unexpected stories about the manifold relationships between nations, people, and their environment.
|
|
| 7. |
|
|
| 8. |
- Blom, Thomas, Professor, 1961-, et al.
(author)
-
Emerging Destinations for New Generations of Swedish Students Studying Abroad
- 2022
-
In: Reimagining Mobility in Higher Education. - Switzerland : Springer. - 9783030938642 - 9783030938659 - 9783030938673 ; , s. 101-112
-
Book chapter (peer-reviewed)abstract
- The number of Swedish students temporarily studying in another countryto receive a post-secondary education amounts annually to approximately 22,000students. The study aims to give some indications of where outbound Swedishstudents have spent their time and money studying abroad since the turn of themillennium. What are the popular study destinations? What are students looking for?Will their interest in studying abroad change post-COVID-19? The results show thatEnglish-speaking countries are attractive to Swedish outbound students. Top desti-nations are the UK and US. Countries such as Poland, Canada, Switzerland, Japan,the Netherlands, Latvia, South Korea and Singapore are growing in popularity. Itis noticeable that big cities attract Swedish outbound students. Large metropolescan offer many prestigious Higher Education Institutions (HEI). Popular cities forSwedish outbound students are London, Copenhagen, Riga, Singapore and Sydney.
|
|
| 9. |
|
|
| 10. |
- Cheruku, Pradeep, et al.
(author)
-
Asymmetric Hydrogenation of Di and Trisubstituted Enol Phosphinates with N,P-Ligated Iridium Complexes
- 2008
-
In: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 0002-7863 .- 1520-5126. ; 130:16, s. 5595-5599
-
Journal article (peer-reviewed)abstract
- The iridium-catalyzed asymmetric hydrogenation of various di- and trisubstituted enol phosphinates has been studied. Excellent enantioselectivities (up to >99% ee) and full conversion were observed for a range of substrates with both aromatic and aliphatic side chains. Enol phosphinates are structural analogues of enol acetates, and the hydrogenated alkyl phosphinate products can easily be transformed into the corresponding alcohols with conservation of stereochemistry. We have also hydrogenated, in excellent ee, several purely alkyl-substituted enol phosphinates, producing chiral alcohols that are difficult to obtain highly enantioselectively from ketone hydrogenations.
|
|
| 11. |
- Cheruku, Pradeep, 1976-
(author)
-
Asymmetric Hydrogenations : Syntheses of Ligands and Expansion of Substrate Scope
- 2008
-
Doctoral thesis (other academic/artistic)abstract
- Asymmetric hydrogenation has emerged as a versatile methodology to obtain a wide range of chiral precursors. This thesis focused on the synthesis of new chiral ligands and the expansion of the substrate scope of asymmetric hydrogenations. Paper I described the synthesis and evaluation of N,P-ligands for the Ir-catalyzed hydrogenations of unfunctionalized olefins. The substrate scope of Ir-catalyzed asymmetric hydrogenations is limited to a narrow range of “test” olefins. The foremost focus of this thesis was to expand the substrate scope of Ir-catalyzed asymmetric hydrogenations. Papers II and III disclosed the potential of the N,P-ligated Ir complexes in hydrogenation of the enol phosphinates. This substrate class is attractive because the hydrogenated products are chiral alkylphosphinates that can be transformed into chiral alcohols and chiral phosphines without sacrificing enantiopurity. A wide range of enol phosphinates were hydrogenated to excellent conversions and enatioselectivities. The hydrogenation of purely alkyl-substituted enol phosphinates in very high conversions and ee values was emphasized in these studies. Paper IV described the investigation of unfunctionalized enamines as substrates in Ir-catalyzed hydrogenation studies. The hydrogenation results and structural limitations of the substrates are presented. Paper V described the asymmetric hydrogenation of diphenylvinylphosphine oxides, di- and trisubstituted vinyl phosphonates. The hydrogenation of diphenylvinylphosphine oxides gives direct access to protected chiral phosphines. The hydrogenated products of vinylphosphonates are highly synthetically useful in pharmaceutical and material chemistry. Hydrogenation of E/Z mixtures of carboxyethyl vinylphosphonates with perfect enantioselectivities was striking in these studies. In paper VI, we have reported the development of a new, highly enantioselective synthetic route to building blocks with CF3 at the chiral center. Several functionalized and unfunctionalized CF3-substituted olefins were hydrogenated with varied degree of success. This methedilogy is useful in the formation of chiral fluorine-containing molecules for a wide range of applications. Paper VII described the hydrogenation of imines using the phosphine-free Cp*Ru/diamine complexes. Chiral version of this reaction was also examined. Despite the modest results, this is the first study to use phosphine-free Cp*Ru/diamine complexes as catalysts for the reduction of C=N double bonds.
|
|
| 12. |
|
|
| 13. |
|
|
| 14. |
- Hadadi, Fatemeh, et al.
(author)
-
Estimation of actual evapotranspiration : A novel hybrid method based on remote sensing and artificial intelligence
- 2022
-
In: Journal of Hydrology. - : Elsevier BV. - 0022-1694. ; 609
-
Journal article (peer-reviewed)abstract
- Actual evapotranspiration (AET) is one of the decisive factors controlling the water balance at the catchment level, particularly in arid and semi-arid regions, but measured data for which are generally unavailable. In this study, performance of a base artificial intelligence (AI) model, adaptive neuro-fuzzy inference system (ANFIS), and its hybrids with two bio-inspired optimization algorithms, namely shuffled frog leaping algorithm (SFLA) and grey wolf optimization (GWO), in estimating monthly AET was evaluated over 2001–2010 across Neishaboor watershed in Iran. The inputs of these models were categorized into three groups including meteorological, remotely sensed, and hybrid-based predictors, and defined in the form of 8 different scenarios. Net radiation (Rn), land surface temperature (LST), normalized difference vegetation index (NDVI), soil adjusted vegetation index (SAVI), and soil wetness deficit index (SWDI) were the remotely sensed predictors, computed using MODIS satellite images on the monthly scale for the study area. The results showed that the SWDI predictor has played a significant role in improving the accuracy of AET estimation, with the highest error reduction (12.5, 17 and 26.5% for ANFIS, ANFIS-SFLA, and ANFIS-GWO, respectively) obtained under scenarios including SWDI compared to corresponding scenarios excluding this predictor. In testing set, the three aforementioned models exhibited their best performance under Scenario 8 (RMSE = 11.93, NSE = 0.69, RRMSE = 0.37), Scenario 4 (RMSE = 11.06, NSE = 0.74, RRMSE = 0.37) and Scenario 4 (RMSE = 10.9, NSE = 0.76, RRMSE = 0.36), respectively. Coupling the SFLA and GWO optimization algorithms to the base model improved the accuracy of AET estimation, with the maximum error reduction for the two algorithms being about 12% (Scenarios 2 and 4) and 14% (Scenario 4), respectively. Examining the performance of the best scenarios of the three models in three intervals including the first, middle, and last third of measured AET values showed that all models were the most accurate in the first third interval. The results also indicated that all models have had higher accuracies in the first and middle third intervals of under-estimation set and the last interval of over-estimation set.
|
|
| 15. |
- Hartley, Jannie Møller, et al.
(author)
-
Interruption, Disruption or Intervention? A Stakeholder Analysis of Small Acts of Engagement in Content Flows
- 2018
-
In: The Future of Audiences. - Cham : Palgrave Macmillan. - 9783319756370 - 9783030092856 - 9783319756387 ; , s. 141-160
-
Book chapter (peer-reviewed)abstract
- This chapter builds upon central findings arising from consultations with stakeholders about audiences’ engagement in the content flows, defined as an ever evolving ecology of online and offline content produced by a number of more and less institutionalised content producers, ranging from news organisations to YouTubers. First, we note that increasing use of audience analytics tends to fragment the monolithic audience into tangible sub-communities. Second, we discuss how production routines of legacy media change in response to small acts of engagement via digital interfaces. Third, audience creativity enters economic relations and amateur production struggles with a tension between being creative and economic logic of production. Fourth, we look at transformations related to (dis)trust as a mutual dynamic that not only concerns audiences’ trust or mistrust in legacy media, but which is increasingly significant in regard to media’s trust in content produced by audiences as well, making it more difficult for audiences to engage with the content produced by media institutions.
|
|
| 16. |
|
|
| 17. |
- Koenig, Meike, et al.
(author)
-
Salt Sensitivity of the Thermoresponsive Behavior of PNIPAAm Brushes
- 2018
-
In: Langmuir. - : AMER CHEMICAL SOC. - 0743-7463 .- 1520-5827. ; 34:7, s. 2448-2454
-
Journal article (peer-reviewed)abstract
- We report investigations on the salt sensitivity of the thermoresponsive behavior of PNIPAAm brushes applying the quartz crystal microbalance coupled with spectroscopic ellipsometry technique. This approach enables a detailed study of the optical and mechanical behavior of the polymer coatings. Additional conclusions can be drawn from the difference between both techniques due to a difference in the contrast mechanism of both methods. A linear shift of the phase transition temperature to lower temperatures with the addition of sodium chloride was found, similar to the behavior of free polymer chains in solution. The thermal hysteresis was found to be decreased by the addition of sodium chloride to the solution, hinting to the interaction of the ions with the amide groups of the polymer, whereby the formation of hydrogen bonds is hindered. The results of this study are of relevance to the application of PNIPAAm brushes in biological fluids and demonstrate the additional potential of the ion sensitivity besides the better known thermosensitivity.
|
|
| 18. |
- Nilsson, Håkan
(author)
-
Konsten med nya medier
- 2005
-
In: Konsthistorisk Tidskrift. - : Informa UK Limited. - 0023-3609 .- 1651-2294. ; 74:4, s. 198-208
-
Journal article (peer-reviewed)
|
|
| 19. |
|
|
| 20. |
|
|
| 21. |
|
|
