53 research outputs found
Pressure induced metallization of Cu3N
We employed accurate full potential density-functional theory and linearized
augmented plane wave method to investigate the electronic properties and
possible phase transitions of Cu3N under high pressure. The anti perovskite
structure Cu3N is a semiconductor with a small indirect band gap at ambient
pressure. The band gap becomes narrower with increasing pressure, and the
semi-conducting anti ReO3 structure undergoes a semiconductor to semimetal
transition at pressure around 8.0 GPa. At higher pressure, a subsequent
semimetal to metal transition could take place above 15GPa with a structural
transition from anti ReO3 to Cu3Au structure
Employment of a noninvasive magnetic method for evaluation of gastrointestinal transit in rats
AC Biosusceptometry (ACB) was previously employed towards recording gastrointestinal motility. Our data show a reliable and successful evaluation of gastrointestinal transit of liquid and solid meals in rats, considering the methods scarcity and number of experiments needed to endorsement of drugs and medicinal plants. ACB permits real time and simultaneous experiments using the same animal, preserving the physiological conditions employing both meals with simplicity and accuracy.This study was partially supported by the Brazilian agencies CNPq, Capes and FAPESP
Mapeamento de atributos químicos em diferentes densidades amostrais e influência na adubação e calagem
Variabilidade espacial de atributos do solo e de fatores de erosão em diferentes pedoformas
Ação de rodas compactadoras de semeadoras submetidas a cargas verticais na deformação do solo
Employment of a noninvasive magnetic method for evaluation of gastrointestinal transit in rats
Sequências de culturas em sistema de semeadura direta: II - decomposição e liberação de nutrientes na entressafra
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