Sökning: "Jenny Maria Hellgren"

Hittade 2 avhandlingar innehållade orden Jenny Maria Hellgren.

1. 1. Ethylene and Auxin in the Control of Wood Formation

   Författare :Jenny Maria Hellgren; SLU; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; auxin ; ethylene ; lignification ; growth rate ; fibres ; cambium ; gas chromatography ; reaction wood ; organic acids ; mass spectrometry ; populus tremula ; pinus sylvestris; biology; biologi;

   Sammanfattning : This thesis considers aspects of the regulation of growth rate and fibre properties in forest trees. These properties are both genetically determined and influenced by environmental stimuli. Induction of reaction wood is an environmentally induced process involving changes in growth rate and fibre properties that can be readily studied. LÄS MER

3. 2. Students as scientists : a study of motivation in the science classroom

   Författare :Jenny Maria Hellgren; Magnus Österholm; Jim Ryder; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; motivation; emotions; experiences; authentic science; student-teacher-scientist partnership; secondary school; implementation; classroom; mathematics; self-determination theory; didactics of natural science; naturvetenskapens didaktik;

   Sammanfattning : School science and mathematics have been criticized for being difficult, de-contextualised and teacher-centred. This thesis concerns student motivation in science and mathematics in secondary school, and in particular student motivation in relation to student-teacher-scientist partnerships (STSPs) and an authentic science task called the Medicine Hunt where students help scientists to find new antibiotics. LÄS MER