Dependent variable, viii

It may seem obvious that the effect is electrostatic in origin, like the large gap in log Kos to the left of Fig. 2. However, the local concentration of carboxylic groups in uroporphyrin is of the order of 1 M, and coordination to Fe(II) cannot be ruled out. There is evidence for coordination of Cu(II) to peripheral amine groups in the reaction with TEP (VIII). It was found that rates did not depend linearly on Cu(II) when all other variables were kept constant (36). 

The test assembly used originally by Subcommittee VIII of ASTM Committee B-3 in its comprehensive studies of atmospheric galvanic corrosion had the disadvantage that it depended on paint coatings to confine corrosion to the surfaces in actual contact with each other. In interpreting the results, it was frequently difficult to decide how much corrosion was due to galvanic action and how much to a variable amount of normal corrosion through failure of the paint system. 

Typical configuration for an ESD system is shown in Fig. VIII/4.6-1. All field inputs from process variables and outputs to various actuators MCC shall be connected to the ESD system with the help of an I/O bus. Depending on applicability there could be redundancies in various systems and the communication bus, as shown in Fig. VIII/ 4.6-1. Redundancies are shown with shadows. In the case of other systems where there are multiple systems, these are also shown with the help of shadows. Some systems (say an alarm system) may have an RS 485/422 link. In this configuration an attempt is made to highlight that the system is an independent system but can have an interface with other systems as well. At the top layer, Ethernet has been considered for HMIs, data server (if any), SOE, and other open systems on the same IEEE 802.3 Ethernet. There could be object linking and embedding process control (OPC) clients and these could be serviced by an ESD logic server, which will have dual or TMR redundancy built in. 

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