The purpose of this case study of three laboratory exercises in biology, chemistry and physics is... more The purpose of this case study of three laboratory exercises in biology, chemistry and physics is to show how three Swedish secondary school science teachers’ objectives for labwork are carried out ...
Denna rapport presenterar hur man arbetar med kreativitet, innovationoch talangutveckling inom na... more Denna rapport presenterar hur man arbetar med kreativitet, innovationoch talangutveckling inom naturvetenskaplig undervisning i Sverige.Studien ar i huvudsak baserad pa dokumentanalys av skolans st ...
Narratives of Doctoral Studies in Science Education : making the transition from educational prac... more Narratives of Doctoral Studies in Science Education : making the transition from educational practitioner to researcher
Abstract Living in the anthropocene requires addressing several challenges. New forms of teaching... more Abstract Living in the anthropocene requires addressing several challenges. New forms of teaching where experiences of problem solving, creativity and innovation strategies are needed and considered important. This Swedish study contributes with knowledge on pre-school children’s creativity processes when working on an authentic, child-initiated sustainability problem about consumption. Teachers’ careful listening was important when forming the teaching context for the sustainability problem. A pragmatic perspective on learning and meaning-making is used to identify the significant features of the different phases in the creativity processes. The empirical results show: the importance of affording a creative context with uncoded material for children to transact with; previous experiences have a prominent role when imagining and reaching beyond the ordinary; the importance of teachers’ positive aesthetic judgments for sustaining the creative process. In alignment with the idea of learning as participation, the children broadened the consumption topic to contribute with creative outcomes for animals’ welfare.
ABSTRACT Winter-induced inhibition of photosynthesis in Scots pine (Pinns sylvestris L.) is cause... more ABSTRACT Winter-induced inhibition of photosynthesis in Scots pine (Pinns sylvestris L.) is caused by the combined effects of light and freezing temperatures; light causes photoinhibition of photosystem II (Strand & Oquist, 1985b, Physiologic Plantarum, 65, 117–123), whereas frost causes inhibition of enzymatic steps of photosynthesis (Strand & Öquist, 1988, Plant, Cell & Environment, 11, 231–238). To reveal limiting steps during recovery from winter stress, the potential of photosynthesis to recover and the actual recovery outdoors during spring, were studied in Scots pine. Studies of light dependent O2-evolution under saturating CO2 and recordings of room temperature fluorescence induction kinetics were used. When branches of pine, in February and March, were brought into the laboratory and kept at 18°Cand 100μmol m−2 s−1, light saturated rates and apparent quantum yields of photo-synthetic O2-evolution recovered fully within approximately 48h. The photochemical efficiency of photosystem II, as measured by Fv/Fm ratios, recovered fully within 24h after an initial lag-phase of 2-3 h. Under natural winter conditions, the Fv/Fm ratio decreased more in exposed than in shaded pine, whereas the efficiency of photosynthesis was similarly inhibited in exposed and shadedpine. However, when recovery from winter stress occurred during spring, the Fv/Fm ratios of both shaded and exposed pine recovered well before photosynthesis. It is concluded that the light-induced photoinhibition component of winter stress in photosynthesis of pine recovers well before the frost induced component(s) of winter stress. In this context, reversible photoinhibition of photosynthesis in evergreen conifers is considered as a dynamic down-regulation of photosystem II to prevent more severe photodynamic damage of the thylakoid membrane when photosynthesis is inhibited by frost.
The purpose of this case study of three laboratory exercises in biology, chemistry and physics is... more The purpose of this case study of three laboratory exercises in biology, chemistry and physics is to show how three Swedish secondary school science teachers’ objectives for labwork are carried out ...
Denna rapport presenterar hur man arbetar med kreativitet, innovationoch talangutveckling inom na... more Denna rapport presenterar hur man arbetar med kreativitet, innovationoch talangutveckling inom naturvetenskaplig undervisning i Sverige.Studien ar i huvudsak baserad pa dokumentanalys av skolans st ...
Narratives of Doctoral Studies in Science Education : making the transition from educational prac... more Narratives of Doctoral Studies in Science Education : making the transition from educational practitioner to researcher
Abstract Living in the anthropocene requires addressing several challenges. New forms of teaching... more Abstract Living in the anthropocene requires addressing several challenges. New forms of teaching where experiences of problem solving, creativity and innovation strategies are needed and considered important. This Swedish study contributes with knowledge on pre-school children’s creativity processes when working on an authentic, child-initiated sustainability problem about consumption. Teachers’ careful listening was important when forming the teaching context for the sustainability problem. A pragmatic perspective on learning and meaning-making is used to identify the significant features of the different phases in the creativity processes. The empirical results show: the importance of affording a creative context with uncoded material for children to transact with; previous experiences have a prominent role when imagining and reaching beyond the ordinary; the importance of teachers’ positive aesthetic judgments for sustaining the creative process. In alignment with the idea of learning as participation, the children broadened the consumption topic to contribute with creative outcomes for animals’ welfare.
ABSTRACT Winter-induced inhibition of photosynthesis in Scots pine (Pinns sylvestris L.) is cause... more ABSTRACT Winter-induced inhibition of photosynthesis in Scots pine (Pinns sylvestris L.) is caused by the combined effects of light and freezing temperatures; light causes photoinhibition of photosystem II (Strand & Oquist, 1985b, Physiologic Plantarum, 65, 117–123), whereas frost causes inhibition of enzymatic steps of photosynthesis (Strand & Öquist, 1988, Plant, Cell & Environment, 11, 231–238). To reveal limiting steps during recovery from winter stress, the potential of photosynthesis to recover and the actual recovery outdoors during spring, were studied in Scots pine. Studies of light dependent O2-evolution under saturating CO2 and recordings of room temperature fluorescence induction kinetics were used. When branches of pine, in February and March, were brought into the laboratory and kept at 18°Cand 100μmol m−2 s−1, light saturated rates and apparent quantum yields of photo-synthetic O2-evolution recovered fully within approximately 48h. The photochemical efficiency of photosystem II, as measured by Fv/Fm ratios, recovered fully within 24h after an initial lag-phase of 2-3 h. Under natural winter conditions, the Fv/Fm ratio decreased more in exposed than in shaded pine, whereas the efficiency of photosynthesis was similarly inhibited in exposed and shadedpine. However, when recovery from winter stress occurred during spring, the Fv/Fm ratios of both shaded and exposed pine recovered well before photosynthesis. It is concluded that the light-induced photoinhibition component of winter stress in photosynthesis of pine recovers well before the frost induced component(s) of winter stress. In this context, reversible photoinhibition of photosynthesis in evergreen conifers is considered as a dynamic down-regulation of photosystem II to prevent more severe photodynamic damage of the thylakoid membrane when photosynthesis is inhibited by frost.
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