Synthetic Co

Models for haemoglobin and myoglobin. It has been known for a long time that a range of synthetic Co(n) complexes are able to bind reversibly dioxygen in a manner related to the natural systems (Basolo, Hoffman Ibers, 1975 McLendon Martell, 1976). However, similar complexes of iron do not normally function as 02 carriers - rather oxidation to Fe(m)... 

Scheme 18 Synthetic Approach to a Peptide Containing a Pyridoxal Moiety on a Side Chain153541 and a Synthetic Co-factor Amino Acid 63(551...

The design of polydentate ligands containing imines has exercised many minds over many years, and imine formation is probably one of the commonest reactions in the synthetic co-ordination chemist s arsenal. Once again, the chelate effect plays an important role in stabilising the co-ordinated products and the majority of imine ligands contain other donor atoms that are also co-ordinated to the metal centre. The above brief discussion of imine formation will have shown that the formation of the imine from amine and carbonyl may be an intra- or intermolecular process. In many cases, the detailed mechanism of the imine formation reaction is not fully understood. In particular, it is not always clear whether the nucleophile is metal-co-ordinated amine or amide. Some intramolecular imine formation reactions at cobalt(m) are known to proceed through amido intermediates. A particularly useful intermediate (5.24) in metal-directed amino acid chemistry is... 

Comparison of trap designs for use with aggregation pheromone and synthetic co-attractant in a user-friendly attract and kill system to control Carpophilus spp. (Coleoptera Nitidulidae). Aust. J. Entomol., 46, 244-250. 

Starch-based biopolymers are lower cost materials than some other biodegradable polymer types such as synthetic co-polyesters and PLA. They are produced from relatively cheap agricultural feedstock and have simpler manufacturing processes compared with synthetic biopolymers. 

Synthetic Co,l C3,()4 0.25 nitrogen atmosphere, and then heated to boiling point. A mixture of KOH and KNO, was added dropwise within 70 min, and the boiling and mixing was continued for the next 1 h. After cooling to room temperature, the precipitate was washed with degassed water and dried under reduced pressure. 

The nitrito mode of binding was also observed in the Mn Mb—nitrite complex (Figure 64B) and quite unexpectedly in the d Co Mb-nitrite complex (Figure 64C). In synthetic Co porphyrin complexes, the nitro configuration has been observed in the ground state (200). 

Co-assembly of neutral-ionic blocks, 2009 [42] graft, random copolymers with oppositely chaiged species in aqueous solution synthetic (co)polymers of various architectures biopolymers multivalent ions metallic nanoparticles surfactants polyelectrolyte block copolymer micelles metaUo-supramolecular polymers... 

Polyethylene oxide and phenolic resin (either a synthetic co factor or a naturally occurring lignosulphate)... 

A high content of dicarboxylic acid is the most characteristic feature of the composition of aliphatic components of suberin (231). The generation of dicarboxylic acids by oxidation of endogenous cu-hydroxy fatty acids has been demonstrated in cell-free preparations from the excised epidermis of Vida faba leaves (242). This dehydrogenase activity, which showed a strong preference for NADP, was located in the 100000-g supernatant. Modification of the substrate, o>-hydroxyhex-adecanoic acid, by removal or esterification of the carboxyl or incorporation of a hydroxyl moiety at C-10, rendered it a poor substrate. cu-Oxohexadecanoic acid could be trapped by dinitrophenylhydrazine, indicating that the oj-oxo acid was probably an intermediate in the reaction. Additionally, synthetic co-oxohex-adecanoic acid was converted to Cjg dicarboxylic acid by the enzyme preparation. 

Injection brine salinity/hardness Not critical but may determine which polymers can be used High salinity/hardness - biopolymer or new synthetic co-polymers Lower salinity/hardness ->HPAM... 

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