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تعداد نتایج: 650624 فیلتر نتایج به سال:
In this work, the structural and magnetic properties of LaMn1-xCoxO3 (x = 0.00, 0.25, 0.50, 0.75, 1.00) are investigated. The structural characterization of compounds by X-ray powder diffraction is evidence for a rhombohedral structure (R -3c space group). Much less increase of the unit cell volume suggests that Co enters in lattice as Co+2 for x ≤ 0.5 while much more decrease of the unit cell ...
OBJECTIVE To assess impacts of the nationwide Norwegian School Fruit Scheme (NSFS) using nationally representative data. DESIGN The NSFS is organized such that primary-school children (grades 1-7) are randomly assigned to one of three school fruit arrangements: (i) the child receives one free fruit or vegetable per day; (ii) the child is given the option to subscribe to one fruit or vegetable...
OBJECTIVE This study aimed to assess the prevalence of borderline personality symptoms in 16-18 year old adolescents. METHODS In this cross sectional - descriptive study, 422 high school students (211 boys, 211 girls) aged 16-18 were selected by cluster random sampling and simple random sampling in 2011-2012. The participants were assessed using the revised diagnostic interview for borderline...
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OBJECTIVE Education is a crucial social determinant of health. Food insecurity can be detrimental to children's academic achievement, potentially perpetuating a cycle of poverty and food insecurity. We aimed to assess the relationship between food insecurity and academic achievement in Canadian school-aged children. DESIGN Cross-sectional study of children and parents. Parents completed the s...
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