Some Crystallographic Activities Organized in Mexico
نویسندگان
چکیده
منابع مشابه
Some algebraic properties of crystallographic sublattices.
In this article, a number of the results relevant to the concept of sublattices of a basic crystallographic lattice are reviewed, emphasizing particularly previously unpublished work on the algebraic aspects. A three-dimensional geometric lattice L can be considered as an infinite Abelian group under addition. A sublattice S of L, which is also three-dimensional, is a subgroup of L such that th...
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The standard molecular replacement (MR) protocol involves one-by-one search for molecules composing the asymmetric unit, therefore the non-crystallographic symmetry (NCS) complicates the structure determination. However, the conservation of the oligomeric state in a series of homologues and the use of information about the NCS in the target crystal may help to solve difficult MR problems. A num...
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The concentrations of metals, Cd, Cu, Fe, Mn, Ni, Pb, and Zn were determined in some lagoons to establish the level of metal pollution. The lagoons studied were Alvarado lagoon, Veracruz; San Andres lagoon, Tamaulipas; and Terminos lagoon, Campeche. The concentrations were determined in water, oyster (Crassostrea virginica), and sediments. Metals were accumulated in either oysters or sediments....
متن کاملSome fractal aspects of Self - Organized Criticality
The concept of Self-Organized Criticality (SOC) was proposed in an attempt to explain the widespread appearance of power-law in nature. It describes a mechanism in which a system reaches spontaneously a state where the characteristic events (avalanches) are distributed according to a power law. We present a dynamical systems approach to Self-Organized Criticality where the dynamics is described...
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OBJECTIVE This paper describes the 2001-2012 progression of limitations in daily activities in the Mexican elderly population aged 60 or older and identifies how sociodemographic and health factors affect these progressions. MATERIALS AND METHODS Data come from the Mexican Health and Aging Study (MHAS), a national sample of adults born in 1951 or earlier, including a baseline survey in 2001 a...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations and Advances
سال: 2014
ISSN: 2053-2733
DOI: 10.1107/s205327331408704x