PubMed · 13677850
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W P Maher. 2003. Disagrees with article.. https://pubmed.ncbi.nlm.nih.gov/13677850/
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MgAl-layered double hydroxides with different interlayer anions (nitrate, carbonate and chloride) were evaluated for their abilities to adsorb the organic pesticide glyphosate (N-phosphonomethyl glycine, Gly). The adsorption isotherms of Gly on layered double hydroxides (LDHs) nitrate were described by the Langmuir equation at lower equilibrium concentration of Gly (C(e)<1.0 mmol/L), and the Gly adsorption capacity on LDHs increased with the layer charge density, i.e. the structural Al3+/Mg2+ ratio. Gly adsorption on LDHs nitrate generally occurred through two processes, external surface adsorption and interlayer anion exchange. The adsorption amount on LDHs at C(e)=1.0 mmol/L decreased in the order of interlayer anions: Cl(-)>NO3(-)>CO3(2-).
In this paper coal-fuel oil ash has been characterized in terms of leaching behaviour and reactivity against lime and gypsum in hydratory systems for the manufacture of building materials. Its behaviour was also compared to that of coal ash. Metal release was measured in a dynamic leaching test with duration up to 16 days. The results have shown that coal-fuel oil ash behaves very similarly to coal ash. The reactivity of coal-fuel oil ash against lime and gypsum was measured in mixtures containing only lime and in mixtures containing both lime and gypsum. These systems were hydrated at 25 and 40 degrees C under 100% R.H. The results have shown that the main hydration products are the same as those that are usually formed in similar coal ash-based systems. That is, calcium silicate hydrate in coal-fuel oil ash/lime systems and calcium silicate hydrate plus calcium trisulphoaluminate hydrate in coal-fuel oil ash/lime/gypsum systems. From the quantitative point of view, hydration runs showed that the amounts of both chemically combined water and reacted lime measured in the case under investigation are very similar to those found in similar coal ash-based systems. Finally, the measurement of unconfined compressive strength proved that the systems have potentiality for the manufacture of pre-formed building blocks.
PKD is the founding member of a novel protein kinase family that also includes PKD2 and PKD3. PKD has been the focus of most studies up to date, but little is known about the mechanisms that mediate PKD3 activation. Here, we demonstrate that PKD3 immunoprecipitated from COS-7 cells transfected with a constitutively active G alpha q subunit (alpha(q)Q209L) exhibited a marked increase in basal activity. Addition of aluminum fluoride to cells co-transfected with PKD3 and wild type G alpha(q) also induced PKD3 activation. G alpha(q)-mediated PKD3 activation is associated with persistent translocation of PKD3 from both cytosol and nucleus to plasma membrane. Expression of a COOH-terminal fragment of G alpha q that acts in a dominant-negative fashion attenuated PKD3 activation in response to bombesin receptor stimulation. Our results indicate that G alpha q activation is sufficient to stimulate sustained PKD3 activation and show that the endogenous G alpha q is a major component in the signaling pathway that mediates bombesin-induced PKD3 activation.