Sökning: "Hans Höglund"
Visar resultat 1 - 5 av 11 avhandlingar innehållade orden Hans Höglund.
Sammanfattning : This thesis presents a method of measuring the distribution of fiber bonding ability in mechanical pulp furnishes. The method is intended for industrial use, where today only average values are used to describe fiber bonding ability, despite the differences in morphology of the fibers entering the mill. LÄS MER
Sammanfattning : Mechanical pulps are used in paper products such as magazine or news grade printing papers or paperboard. Mechanical pulping gives a high yield; nearly everything in the tree except the bark is used in the paper. This means that mechanical pulping consumes much less wood than chemical pulping, especially to produce a unit area of printing surface. LÄS MER
3. Utbildning för hållbar utveckling ur ett lärarperspektiv : Ämnesbundna skillnader i gymnasieskolan
Sammanfattning : This thesis investigates how teachers from different disciplines understand and implement education for sustainable development in their teaching. A nationwide questionnaire study was conducted with 3229 upper secondary school teachers representing 224 schools in Sweden. LÄS MER
4. Knowledge, Value and Personal experience : Upper secondary students' resources of supporting reasons when arguing socioscientific issues
Sammanfattning : This thesis focuses on upper secondary students’ use of resources in their supporting reasons when arguing socioscientific issues (SSIs). The skills of argumentation have been emphasized in science education during the past decades and SSIs are proven a good context for learners to enhance skills of argumentation and achieve the goal of scientific literacy. LÄS MER
Sammanfattning : The main purpose of this thesis was to find ways to maintain a low level of light‐induceddiscolouration at an increased addition of mechanical and chemimechanical pulps in coated highqualityfine paper and magazine paper grades. Current technology allows the production of highyieldpulps such as thermomechanical and chemimechanical pulps with properties suitable formanufacturing high‐quality paper or paperboard with a low basis weight. LÄS MER