Metal ion derivatives

The sub-classification of the oxidising metal ions derives from overall reactivity, which is only crudely related to redox potential and is gauged largely with hindsight. 

Thus, most of the color in glass is produced by metallic ions derived from minerals, usually in relatively small amounts within the glass structure. Already in antiquity there was awareness of the effects of some other metals on the color of glass. It was known then, for example, that even relatively small amounts of specific metals, included as minerals in the components of a glass melt, could produce colored glass particular metalliferous minerals were therefore added to glass melts so as to produce special and... 

As a class, metal-ion derivatives of tetrapyrrole macrocyclic rings, such as the corrins or porphyrins (see Chapter 1 for the parent ring structures), are of major biological importance. 

Color Effects in Aqueous Systems Containing Divalent Metal Ions Derived from Selected 3d Elements... 

Phytate is used here collectively in reference to metal ion derivatives of inositol hexa- and pentakisphos-phates and includes all isomeric forms. As a purified compound, phytate is available as myo-inositol hexa-kis[dihydrogen] phosphate (a salt of phytic acid or inositol hexaphosphoric acid) and is commonly abbreviated as IHP or lnsP6. Throughout this chapter the term phytate is used for generic reference and myo-inositol hexakisphosphate in relation to the use of purified compound. 

Another source of the metal ion content of lignin is from the enzyme solutions. Two types of enzymatic preparations were used a mixture of the cellulases produced by cultures of Schizophyllum commune and Trichoderma reesei ( ) and a commercial preparation (Cellucast, Novo industry, Denmark) which is a concentrate of the cellulases produced by Trichoderma viride. Both types of enzyme preparation contain metal ions derived from the culture media. 

Anaerobic adhesives cure as single-component products only on certain "active" metal surfaces when ions from the surface act as accelerators for the rate of adhesive cure. Single-component, anaerobic threadlocking adhesives are examples, deriving their speed of cure from both the anaerobic catalysts and the accelerating effect of transition metal ions derived from copper, iron, or steel surfaces. 

When a buffer is incorporated into an ink, a metal ion derived from the buffer may contribute to the destabilization of a colorant in the ink (29). As a result, in the case where the liquid composition is used, such a high optical density as that cannot be obtained by merely using a liquid composition having a polyvalent metal ion. 

Investigation of the influence of the hexameric structure on the activity of GpdQ and generation of differed mixed metal ion derivatives to investigate... 

Paits of this Chapter have been reprinted from L.J. Daumann et al. Promiscuity Comes at a Price Catalytic Versatility vs. Efficiency in Different Metal Ion Derivatives of the Potential Bioremediator GpdQ BBA—Proteins and Proteomics 2013, 1834, 1, 425 32. with permission from Elsevier. 

Table 3.2 Summary of Kj and n values in different mixed metal ion derivatives of GpdQ at pH 7...

Table 3.4 Summary of pK and pKes values for the different metal Ion derivatives of GpdQ...

Table 3.5 Kinetic parameters for the hydrolysis of BPNPP by different metal ion derivatives of GpdQ at optimal pH ( no data available)...

The contribution of minerals to the nutri-tive/physiological value and the physical state of food has been covered in the Foreword of this Chapter and under the individual elements. However, there are metal ions, derived from food itself or acquired during food processing... 

The leakage current may include extremely low components of metallic ions derived from the anode, but the predominance is due to indifferent ions and electrolyzed substances, mainly water through hydrogen reduction. Gaseous pollutants dissolve into the water film or polymer and maintain concentration levels proportional to the outside vapor pressure according to Henry s law applicable to dilute solutions. Among the notorious pollutants are SOj, NOg, and COj, which provide the ionic species for conduction through electrolysis. 

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