Results 281 to 290 of about 51,861 (326)

Plasmid chromate resistance and chromate reduction

Plasmid, 1992
Compounds of hexavalent chromium (chromates and dichromates) are highly toxic. Plasmid genetic determinants for chromate resistance have been described in several bacterial genera, most notably in Pseudomonas. Resistance to chromate is associated with decreased chromate transport by the resistant cells.
C, Cervantes, S, Silver
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CHROMATIC GEOMETRY

The Quarterly Journal of Mathematics, 1987
A chromatic geometry, or rainbow, is defined as follows. Let X and I be sets and \(\Delta\) : \(X\times X\to I\) a surjective function. For \(i\in I\) we write \(\Delta_ i\) for the inverse image in \(X\times X\) of i under \(\Delta\) and define \(\Delta \quad p_ i=\{(y,x): (x,y)\in \Delta_ i\}.\) A triple (X,\(\Delta\),I) is a chromatic geometry or ...
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Chromate Allergy: Chromate Content of Asian Cement

The Journal of Dermatology, 1986
AbstractThe chromate content of 10 different Asian cements is studied. The hexavalent chromate and total chromium concentrations in these cements were analyzed using colorimetric spectrophometry and flame atomic absorption spectrophotometry, respectively. The pH of an aliquot of 20% w/v of cement in water ranged from 11.8 to 12.1.
C L, Goh, S F, Kwok
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Chromatic Solutions

Canadian Journal of Mathematics, 1982
Early in the Seventies I sought the number of rooted λ-coloured triangulations of the sphere with 2p faces. In these triangulations double joins, but not loops, were permitted. The investigation soon took the form of a discussion of a certain formal power series l(y, z, λ) in two independent variables y and z.The basic theory of l is set out in [1 ...
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Chromatic Scheduling and the Chromatic Number Problem

Management Science, 1972
The chromatic scheduling problem may be defined as any problem in which the solution is a partition of a set of objects. Since the partitions may not be distinct, redundant solutions can be generated when partial enumeration techniques are applied to chromatic scheduling problems. The necessary theory is developed to prevent redundant solutions in the
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