SUBJECTS mother cell

As noted in Section 2, Metz and Diekmann [MD, p. 237] describe a different size-structured model, one that reflects the cell-division process quite well. They assume that cell size x varies among the individual cells of the population, from a minimum value Xmin to a maximum value that is normalized to 1. A function b x) gives the per-unit time probability of a cell of size x dividing. Small cells are not allowed to divide (f>(Ar) = 0, xmother cell of size x is assumed to divide into two daughter cells, one of size px and one of size (1 -p)x, with probability d p), 0 < / < 1. Of course, d(p) = d l —p) and/o d(p) dp =. The unit of size x -whether length, area, or volume - is not specified in [MDj. This makes their assumption that the growth rate of a cell of size x is proportional to X (and to f(S)) subject to different interpretations. The reader is referred to [MD, p. 238] for the equations and hypotheses. Their model also can be reduced to the equations considered in Chapter 1. 

Binding via synchronicity occurs in milliseconds to seconds. Binding via chemical modulation occurs in minutes to hours. We need both, and we must make the best of both until we understand the mother of all questions how does the synchronous and chemically coherent activation of brain cells result in conscious experience in the first place How, after all, is the nervous system involved in subjective experience - what the philosophers call qualia - and what David Chalmers dubs the hard problem Chalmers asserts that neuroscience has not yet, and may never, solve the hard problem. If you love a mystery, and want to avoid the implications of what neuroscience is saying, you have a way out here. Neuroscientists are no more believable than anyone who waves his hands and says And then a miracle happens . The brain is a colony of neurons it thinks and therefore it is. 

Once in the blood, ample evidence now suggests that aluminum Ccm cross the blood-brain barrier to enter the brain. Liss, using newborn rabbits, found that aluminum chloride ingestion by the mother rabbit resulted in increased aluminum content in the mother s milk and in the brains of the suckling rabbits. It is impor-temt to remember, however, that the blood-brain barrier may not have been fully formed in the infant rabbits. DeBoni et al. subjected adult rabbits to repeated subcutaneous injections of aluminum. Atomic absorption spectroscopy showed that brain aluminum levels increased from 1.1 xg/g diy weight (controls) to 2.5-47.9 Xg/g in injected animals. Using the aluminum-sensitive Morin stain, th found that neutrophils and monocytes within vessels and capillary endothelial cells exhibited intensely fiuores-cent nuclei, whereas the nuclei of cells of the choroid plexus were... 

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