8,309 research outputs found
Características físicas e químicas das principais cultivares de milho pipoca plantadas no Brasil.
Get PDFCapacidade combinatória para desenvolvimento larval e ciclo biológico de Spodoptera frugiperda em seis linhagens da população de milho CMS 23.
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Avaliação de antibiose em dialelos de milho selecionados para resistência a lagarta-do-cartucho, Spodoptera frugiperda.
Get PDFInfluência do parcelamento de diferentes fontes de nitrogênio no teor de proteína em milho QPM e normal.
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Treating some solid state problems with the Dirac equation
Full text linkThe ambiguity involved in the definition of effective-mass Hamiltonians for
nonrelativistic models is resolved using the Dirac equation. The multistep
approximation is extended for relativistic cases allowing the treatment of
arbitrary potential and effective-mass profiles without ordering problems. On
the other hand, if the Schrodinger equation is supposed to be used, our
relativistic approach demonstrate that both results are coincidents if the
BenDaniel and Duke prescription for the kinetic-energy operator is implemented.
Applications for semiconductor heterostructures are discussed.Comment: 06 pages, 5 figure
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