Heyding

The process is fairly robust. As for one of the main problematic inputs, chlorine from PVC, the plant was able to handle MPW with the regularly occurring PVC content of 4%-5%. This implies a chlorine tolerance of some 2.5%. As for the emissions and resource use, Heyde and Kremer (a.6) have carried out an extensive study. All emissions will comply with local regulations. 

The LCA of Heyde and Kremer (a.6) gives an extensive review of emissions and resource use. However, by and large one could assume that the emissions by using plastics as reducing agent will be more or less equal to the emissions that would occur if another reducing agent were to be used. For a discussion on the (probably limited) relevance of dioxin emission see Section 3.5.3. 

A LCA on treatment options of MPW was performed by the Dutch Centrum voor Energiebesparing en Schone Technologie (CE, Delft) in 1994. This LCA used the VEBA process as an example for feedstock recycling (a.ll). Another LCA was performed by Heyde and Kremer (a.6). Particularly the CE studies suggested that the VEBA process was a bit less advantageous than the Texaco process, mainly due to the fact that the Texaco process does not need agglomeration of MPW as pre-treatment, whereas the VEBA process apparently does. 

A study of the Frauenhofer Institut Verfahrenstechnik und Verpackung (IVV) gave a good overview of the inputs and outputs of the SVZ process. Table 1 reviews these data, see also the original study of Heyde and Kremer (a.6). 

Table 1 Inputs and outputs of the SVZ process (based on Heyde and Kremer (a.6)) ...

Heyde M, Schacht E (2004) In Gleria M,De Jaeger R (eds) Phosphazenes. A worldwide insight. Nova, Hauppauge, chap 15, p 367... 

A Heyd, D Dhabhar. Particle shape effect on caking of coarse granulated antacid suspensions. Drug Cosmet Ind 125 42-45. 1979. 

Resonance Raman spectra of all four LHCII xanthophylls reveal differences in the v, frequencies, which normally depends upon the conjugation number (Heyde et al 1971 Rimai et al 1973). In addition, the neoxanthin transition is further upshifted reflecting the m-conformation. The v, region of this xanthophyll possesses additional bands at 1120,1132, and 1203 cm-1 characteristic for the 9-cis configuration (Hu et al., 1997). The v3 band frequency also differs in these xanthophylls. Finally, v4 is small and featureless in all isolated pigments. 

Heyde, M.E., Gill, D., Kilponen, R.G., and Rimai, L. 1971. Raman spectra of Schiff bases of retinal (models of visual photoreceptors J. Am. Chem. Soc. 93 6776-6780. 

Heyd has studied the stability of neomycin in aqueous gels and formulated a satisfactory product by adsorbing the antibiotic on an ion exchange resin, Amberlite IRP-69M, prior to incorporation in the gel. 

Pekthong D, Martin H, Abadie C, Bonet A, Heyd B, Mantion G, richert L. (2008) Differential inhibition of rat and human hepatic cytochrome P450 by Andrographis paniculata extract and andrographolide. J Ethonopharmacol 115 432-440. 

Since 1950, the scope and nature of these effects have been studied in greater detail. Amberg and McIntosh 67) were the first to use porous glass as the adsorbent and studied water adsorption. In later work 68, 69) butane, ethyl chloride, and ammonia were adsorbed. Flood and Heyding... 

Stephenson, V.C., Heyding, R.A. and Weaver, D.F. (2005) The promiscuous drug concept with applications to Alzheimer s disease. FEBS Letters, 579 (6), 1338-1342. 

The stereochemistry of reactions at zinc atoms has been studied in small molecules (Auf der Heyde and Nassimbeni, 1984) and in proteins (Holmes and Matthews, 1981 Vallee and Auld, 1990a,b). Zinc enzymes include carboxypeptidase A (Quiocho and Lipscomb, 1971 Rees et al., 1983), in which the zinc is coordinated to two histidine nitrogen atoms, two glutamate oxygen atoms, and water (involved in hydrolysis) (Fig. 26). 

Auf der Heyde, T. P. E., and Nassimbeni, L. R. (1984). Reaction pathways from structural data Dynamic stereochemistry of zinc(ll) compounds. Acta Crystallogr. Sect. B 40, 582-590. 

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