Browsing by Author "Leinonen, Anna"

Now showing 1 - 5 of 5
  • No Thumbnail Available
    Item
    Effects of Cell Culture and Membrane Preparation Conditions on the Apparent Expression Level and Function of alpha2C-Adrenoceptors in CHO-K1 Cells
    (2002) Leinonen, Anna; Wurster, Siegfrid; Kemian tekniikan osasto; Teknillinen korkeakoulu; Helsinki University of Technology; Nordström, Katrina
  • Thumbnail Image
    Item
    Finding high-impact intervention points for plastic recycling using an exploratory stock-flow model
    (Elsevier Science Ltd., 2023-04-01) Wiman, Henri; Siltaloppi, Jaakko; Leinonen, Anna; Department of Industrial Engineering and Management; VTT Technical Research Centre of Finland
    With the growing impetus to increase the recycling of plastic waste, a more detailed understanding of the impact of different interventions on improving material circulation in the plastic value chain is needed. This paper uses an exploratory stock-flow modeling approach to analyze the impact potential of critical intervention points and their combinations for increasing circularity and reducing linearity in the Finnish plastic recycling system. The results show that interventions at all our selected intervention points—demand, collection, sorting, and processing—are needed to reach the best outcomes in terms of linear material flows. With uncertainty regarding international flows, collection- and sorting-targeting actions are most effective in avoiding the most pessimistic circularity outcomes, whereas demand- and capacity-targeting interventions have the potential to achieve the best optimistic circularity outcomes. The results contribute to previous research on plastic recycling by improving understanding of the critical bottlenecks and synergistic effects of supply- and demand-side interventions, as well as by supporting policy and industrial decision-making by drawing attention to effective combinations of interventions under uncertainty. The analysis also highlights how the coarse resolution structure of the material flow system governs the impact potential of intervention points, while many system parameters are less significant.
  • No Thumbnail Available
    Item
    Strategy as a story – How Finnish listed companies use narratives in external strategy communication
    (2019) Heiniö, Onni; Moisander, Johanna; Leinonen, Anna; Johtamisen laitos; Kauppakorkeakoulu; School of Business
    The purpose of this study is to examine how Finnish listed companies use narratives and storytelling in their external strategy communication. Storytelling is accepted as a powerful tool of communication yet its use in strategy communication has not been extensively studied. The study is therefore exploratory, its aim is to establish an understanding of the subject and find topics for further research. Furthermore, the study aims to fill the gap in strategy-as-narrative research on how narratives are constructed in strategy texts. The research objective is explored through three research questions: (1) What patterns of meaning and potential narrative genres can be found in strategy communication of Finnish listed companies in their official websites? (2) How are features of strategic narratives used in this strategy communication? (3) How do three companies representing different narrative genres construct strategic narratives in their annual reports? The theoretical framework of the study is based on strategy, business communication and narrative literature. In addition, a framework of strategic narrative features is specifically constructed for this study in order to facilitate analysis of the data. The empirical data comprises of websites of 33 large cap companies listed in Helsinki Stock Exchange and 3 annual reports published by the same companies. Specifically, the sections labelled as strategy were examined both in websites and annual reports. The qualitative method of narrative analysis was used in the study, narratives were considered as objects of study and the method focused on their rhetorical aspects. The results suggest that despite the proven benefits of storytelling in business communication, Finnish listed companies do not seem to deliberately construct narratives and stories in their external strategy communication. Especially websites include little storytelling. The strategy texts often descriptively answer the questions of why the company exists, how the company plans to achieve its goals and what are the products and services it provides. The findings suggest that when a strategic narrative is included in the text, it constitutes from three steps of setting the scene, the journey and the desired ending. Each of these steps is constructed through the narrative features. Based on desired endings, three potential narrative genres were identified: (1) The leader (2) The builder of a better world and (3) The customer’s first choice. The lack of deliberate storytelling in external strategy communication, framework of narrative composition of strategy texts and the suggested narrative genres are the main findings of this study.
  • No Thumbnail Available
    Item
    Study of environmental impacts of LWC paper quality development
    (2004) Pajari, Timo; Wessman, Helena; Leinonen, Anna; Puunjalostustekniikan osasto; Teknillinen korkeakoulu; Helsinki University of Technology; Paulapuro, Hannu
    This master's thesis is part of a research project entitled "Technology impacts on environment", which is undertaken by Oy Keskuslaboratorio - Centrallaboratorium Ab. In this work the purpose was to describe and find the relationships between LWC paper quality development and environmental impacts. The study covers mechanical pulp bleaching and papermaking line up to calendering. The environmental impacts under examination are energy and water consumption. At the beginning of the study the quality of LWC paper is defined with product analysis. The aim of the process analysis was to find out the important process parts influencing on critical properties of LWC paper and their development. In process analysis the focus is also on defining the relative importance of different process parts in terms of energy and water consumption. The changes in quality, water consumption and energy consumption were examined with technological development. In order to do this survey of technological development was performed. The influences of process development on quality and environmental load were illustrated. In the case study, which is located at the end of the study, few selected process parts were examined in more detail. The purpose of the case study was to support the examination of technological development. With different cases the so-called eco-efficiency factor was tested, for comparing the different technologies. Before a case study the effects and results of technological development on printability and run ability, and also on energy and water consumptions were presented and discussed. The technological development has focused to a large degree on better runnability. The quality has been promoted in terms of the most important printability properties. Brightness and gloss have increased whereas opacity has remained the same. The impacts of technological development on printability are not always direct, e.g. customers and competitors also influenced greatly on printing property development. Technological development had a more direct influence on runnability. The combination of quality and environmental impacts in complex relationships is difficult. In simple and well-restricted cases the eco-efficiency indicator is useful.
  • Thumbnail Image
    Item
    Upcycling of cellulosic textile waste with bacterial cellulose via Ioncell® technology
    (Elsevier, 2024-06) A.G.S. Silva, Francisco; Schlapp-Hackl, Inge; Nygren, Nicole; Heimala, Senni; Leinonen, Anna; Dourado, Fernando; Gama, Miguel; Hummel, Michael; Department of Bioproducts and Biosystems; Biopolymer Chemistry and Engineering; Textile Chemistry; University of Minho; Aalto University
    Currently the textile industry relies strongly on synthetic fibres and cotton, which contribute to many environmental problems. Man-made cellulosic fibres (MMCF) can offer sustainable alternatives. Herein, the development of Lyocell-type MMCF using bacterial cellulose (BC) as alternative raw material in the Ioncell® spinning process was investigated. BC, known for its high degree of polymerization (DP), crystallinity and strength was successfully dissolved in the ionic liquid (IL) 1,5-diazabicyclo[4.3.0]non-5-enium acetate [DBNH][OAc] to produce solutions with excellent spinnability. BC staple fibres displayed good mechanical properties and crystallinity (CI) and were spun into a yarn which was knitted into garments, demonstrating the potential of BC as suitable cellulose source for textile production. BC is also a valuable additive when recycling waste cellulose textiles (viscose fibres). The high DP and Cl of BC enhanced the spinnability in a viscose/BC blend, consequently improving the mechanical performance of the resulting fibres, as compared to neat viscose fibres.