Hannah

Smith, 1971 Hannah Smith, 1971 Powers, Farah Craig, 1976). The modulus of elasticity in compression is 12 to 13 GPa (Table 6.4) (Powers, Farah Craig, 1976 Wilson, Paddon Crisp, 1979). 

Hannah, C. M. Smith, D. C. (1971). Tensile strengths of selected dental restorative materials. Journal of Prosthetic Dentistry, 26, 314-23. 

Fontana, David. The secret language of symbols a visual key to symbols and their meanings illustrations by Hannah Firmin. Pavilion Books, 1993. 

Rat (Sprague-Dawley) gd5-ppd21 7hr/d 20 (severe alterations in architecture and growth characteristics of Purkinje cell dendritic fields) Hannah and Roth 1991... 

Results from inhalation studies in animals suggest that hydrogen sulfide may be a developmental neurotoxicant. Neurochemical changes (in particular levels of the neurotransmitters gamma-aminobutyric acid, norepinephrine, and serotonin) and levels of the amino acids aspartate, glutamate, and taurine have been observed in various regions of the brain (Hannah et al. 1989, 1990 Skrajny et al. 

Histopathological alterations in the brains of rat pups exposed throughout gestation and lactation have also been reported (Hannah and Roth 1991). Some studies found no developmental effects (Hayden etal. 1990a, 1990b Sallenfait et al. 1989). 

Hannah and Roth (1991) exposed timed pregnant dams (and their pups) from day 5 postcoital, until day 21 postnatal, to either 20 or 50 ppm of hydrogen sulfide for 7 hours a day and found severe alterations in the architecture and growth patterns of the Purkinje cell dendritic fields at both doses leading these authors to conclude that exposure to low concentrations of hydrogen sulfide place developing neurons.. .at risk of severe deficits. ... 

Hannah RS, Roth SH. 1991. Chronic exposure to low concentrations of hydrogen sulfide produces abnormal growth in developing cerebellar Purkinje cells. Neurosci Lett 122 225-228. 

Hannah RS, Bennington R, Roth SH. 1990. A relationship between hydrogen sulfide exposure and taurine levels in maternal rats. Proc West Pharmacol Soc 33 177-179. 

Hannah RS, Hayden LJ, Roth SH. 1989. Hydrogen sulfide exposure alters the amino acid content in developing rat CNS. Neurosci Lett 99 323-327. 

Skrajny B, Hannah RS, Roth SH. 1992. Low concentrations of hydrogen sulphide alter monoamine levels in the developing rat central nervous system. Can J Physiol Pharmacol 70 1515-1518. 

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