Simpson, Gordon

Yates CM, Simpson J, Gordon A, Maloney AF, Allison Y, Ritchie IM, Urquhart A (1983) Catecholamines and cholinergic enzymes in pre-senile and senile Alzheimer-type dementia and Down s syndrome. Brain Res. 280 119-126. 

W. Gordon Simpson, MA, MPhil, AIIMR, MIMgt, FIDiagE, FIM... 

Yates CM, Simpson J, Maloney AF, Gordon A, Reid AH (1980) Alzheimer-Uke choUneigjc deficiency in Down syndrome. Lancet 2 979... 

As the first step, we have taken the gelation of diallyl dicarboxylates for the following reasons (a) Simpson et al. have unsuccessfully attempted to check Gordon s equation, including a formal allowance for cyclization [30], against... 

Gordon [30] has pointed out that even Simpson s treatment considerably underestimates the importance of the effect and has extended the network theory to include a formal allowance for cyclization. He predicted that the conversion at gelation for a polymerizing monomer which undergoes cyclization is given by... 

Subsequently, Simpson et al. [31] attempted to check Gordon s equation against diallyl dicarboxylates other than DAP. In all cases, gelation occurred at a conversion higher than the value predicted, the discrepancy being considerably greater than could be accounted for by experimental error. 

In this connection, Simpson et al. [29] and Gordon [30] employed a value of 19 for Pn(ch),o instead of 32 obtained by us in the estimation of a theoretical gel point for the bulk polymerization of DAP at 80 °C. Moreover, they assumed the value P = Pn as being valid for uniform chains or P = 2P as being valid for random ehains. ... 

Thus, we calculated the theoretical gel points for the polymerizations of DAP, DAI, and DAT from Gordon s equation (Eq. (4)) using P = 2Pn,o and r = 2Rus,o- Table 3 summarizes the results obtained, along with those reported by Simpson et al. [31] the values estimated by us were lower than those of Simpson. 

Yatani A, Brown AM (1991) Mechanism of fluoride activation of G protein-gated muscarinic atrial K channels. J Biol Chem 266 22872-222877 Yates CM, Simpson J, Russel D, Gordon A (1980) Cholinergic enzymes in neurofibrillary degeneration produced by aluminium. Brain Res 197 269-274 Yokel RA, McNamara PJ (1985) Aluminum bioavailability and disposition in adult and immature rabbits. Toxicol Appl Pharmacol 77 344-352 Zaman K, Mukhtar M, Siddique H, Miszta H (1992) The effect of aluminum on the stromal cells in vitro on bone marrow in rats. Toxicol Ind Health 8 103-109 Zaman K, Zaman W, Dabrowski Z, Miszta H (1993) Inhibition of delta amino-evulinic acid dehydratase activity by aluminum. Comp Biochem Physiol 104C 269-273... 

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