Finger-type cells

On the other hand, in bipolar cells, only the terminal cells are connected by intercell conductors, and there are typically many unit cells electrically in series between the terminal cells (Fig. 5.2). The two basic types of bipolar cells are the flat plate cell and the finger type cell. A group of bipolar cells that have a common piping system for the fluids, via manifolds, is referred to as an electrolyzer or sometimes a series or a stack. Within a single bipolar electrolyzer, there are sometimes more than one set of terminal cells. Bipolar electrolyzers can be connected via an external bus within a DC circuit in series or in parallel, but usually not both. Furthermore, in the case of mercury-cell plant conversions to membrane cells, the electrolyzers are connected electrically in parallel as shown in Fig. 5.3. 

FIGURE 2.7. Comparison of Hooker and Diamond cathode designs. A finger type construction (Hooker type S cell) B flattened tube-type construction (Columbia-Hooker Diamond, Hooker type T ). 

As mentioned previously, the vacuum-deposited diaphragm developed in 1928, coupled with the vertical finger anode-cathode construction, initiated the Hooker S series cell. The S type cell continued until 1966, when the single C-60 cell was introduced. In 1970, the H series cell was introduced, with metal anodes replacing the graphite anodes. A summary of the major innovations in Hooker diaphragm-cell design is presented in Table 2.1. 

There are two bipolar filter-press cell designs for manufacturing chlorine, the Dow cell and the Glanor cell. Both use finger-type electrodes, as opposed to flat plates. The Dow cells, developed over the past eighty years [76-79] are simple and rugged. They employ... 

The tetrahedron of zinc thiolates is found in enzymes in both cell types but is most frequently seen in transcription factors, zinc fingers of eukaryotes. 

Hansen A, Rolen SH, Anderson K, Morita Y, Caprio J, Finger TE (2003) Correlation between olfactory receptor cell type and function in the channel catfish. J Neurosci 23 9328-9339 Hansen A, Anderson KT, Finger TE (2004) Differential distribution of olfactory receptor neurons in goldfish structural and molecular correlates. J Comp Neurol 477 347-359 Hashiguchi Y, Nishida M (2006) Evolution and origin of vomeronasal-type odorant receptor gene repertoire in fishes. BMC Evol Biol 6 76... 

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