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Laxman Singh Ravikant Sharma Narayan Singh Atendra Kumar Dev K Mahato Youngil Lee Mikhael Bechelany KD Mandal 《Progress in Crystal Growth and Characterization of Materials》2021,67(4):100542
This review paper covers the low temperature wet growth of nano-engineered particles of ZnO-based mixed metal oxides, their growth mechanism, and characterization using X-ray diffraction, SEM, TEM and IR, UV–visible, and XPS spectral techniques. Main focus of this article is centered on low temperature semi-wet methods of synthesis that are suitable for large scale production of zinc oxide-based systems mixed with iron oxide, copper oxide, nickel oxide and cobalt oxide. These mixed metal oxides have broad industrial applications as catalyst, semiconductors, adsorbents, superconductors, electro-ceramics, and antifungal agents in addition to extensive applications in medicines. This paper discusses the low-cost and environment friendly synthesis of these mixed metal oxides, measurement of properties and applicability of these materials systems. 相似文献
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We consider a collapsing spherically symmetric inhomogeneous dust cloud in higher dimensional space-time. We show that the
central singularity of collapse can be a strong curvature or a weak curvature naked singularity depending on the initial density
distribution. 相似文献
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Nadine S Simons-Weidenmaier Maruschka Weber Claudia F Plappert Peter KD Pilz Susanne Schmid 《BMC neuroscience》2006,7(1):38
Background
Short-term habituation of the startle response represents an elementary form of learning in mammals. The underlying mechanism is located within the primary startle pathway, presumably at sensory synapses on giant neurons in the caudal pontine reticular nucleus (PnC). Short trains of action potentials in sensory afferent fibers induce depression of synaptic responses in PnC giant neurons, a phenomenon that has been proposed to be the cellular correlate for short-term habituation. We address here the question whether both this synaptic depression and the short-term habituation of the startle response are localized at the presynaptic terminals of sensory afferents. If this is confirmed, it would imply that these processes take place prior to multimodal signal integration, rather than occurring at postsynaptic sites on PnC giant neurons that directly drive motor neurons. 相似文献6.
S. M. Ertel 《Mathematical Notes》1995,58(1):762-769
Forn pointsA
i
,i=1, 2, ...,n, in Euclidean space ℝ
m
, the distance matrix is defined as a matrix of the form D=(D
i
,j)
i
,j=1,...,n, where theD
i
,j are the distances between the pointsA
i
andA
j
. Two configurations of pointsA
i
,i=1, 2,...,n, are considered. These are the configurations of points all lying on a circle or on a line and of points at the vertices
of anm-dimensional cube. In the first case, the inverse matrix is obtained in explicit form. In the second case, it is shown that
the complete set of eigenvectors is composed of the columns of the Hadamard matrix of appropriate order. Using the fact that
distance matrices in Euclidean space are nondegenerate, several inequalities are derived for solving the system of linear
equations whose matrix is a given distance matrix.
Translated fromMatematicheskie Zametki, Vol. 58, No. 1, pp. 127–138, July, 1995. 相似文献
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K. Ertel U. Kohl J. Lehmann M. Merschdorf W. Pfeiffer A. Thon S. Voll G. Gerber 《Applied physics. B, Lasers and optics》1999,68(3):439-445
Received: 6 November 1998 相似文献
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G. Ertel 《Isotopes in environmental and health studies》2013,49(7):201-203
Es wird ein kruzer Überblick gegeben über die Entwicklung des Produktionssortiments an radioaktiven und stabilen Isotopen, markierten Verbindungen und umschlossenen Strahlungsquellen in den RGW-Mitgliedslāndern sowie der gegenseitigen Lieferungen von diesen Erzeugnissen. 相似文献