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تعداد نتایج: 16457 فیلتر نتایج به سال:
In the emerging field of spin-electronics ideal ferromagnetic electron sources would not only possess a high degree of spin polarization, but would also offer control over the magnitude of this polarization. We demonstrate here that a simple scheme can be utilized to control both the magnitude and the sign of the spin polarization of ferromagnetic CoS2, which we probe with a variety of techniqu...
Pressure effect on Curie temperature, dTc/dp, for amorphous Col-,B, alloys is estimated indirectly from forced volume magnetostriction even in Tc > Tcry. Results estimated indirectly show smaller values compared with those measured directly, and are consistent with thermal expansion. The value of dTc/dp extrapolated to Co agrees with that for crystalline Co.
The Brazilian fauna of DiptychophoraZeller, 1866 (Lepidoptera, Pyralidae sensu lato, Crambinae) is reviewed. Consisting three species based on the literature (D. diasticta Gaskin, 1986, D. kuhlweiniiZeller, and subazanalisBłeszyński, 1967), this augmented with new (Diptychophora galvani sp. n. from Mato Grosso Minas Gerais, planaltina Federal District, ardalia Bahia), that are described illustr...
Domain 5 (D5) is a highly conserved, largely helical substructure of group II introns that is essential for self-splicing. Only three of the 14 base pairs present in most D5 structures (A2.U33, G3.U32, and C4.G31) are nearly invariant. We have studied effects of point mutations of those six nucleotides on self-splicing and in vivo splicing of aI5 gamma, an intron of the COXI gene of Saccharomyc...
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