Zinc storage

In topochemical reactions all steps, including that of nucleation of the new phase, occur exclusively at the interface between two solid phases, one being the reactant and the other the product. As the reaction proceeds, this interface gradually advances in the direction of the reactant. In electrochemical systems, topochemical reactions are possible only when the reactant or product is porous enough to enable access of reacting species from the solution to each reaction site. The number of examples electrochemical reactions known to follow a truly topochemical mechanism is very limited. One of these examples are the reactions occurring at the silver (positive) electrode of silver-zinc storage batteries (with alkaline electrolyte) ... 

Although metallothionein in liver binds zinc, there seems no apparent zinc storage in the body according to the kinetic analysis. ... 

In many bacterial species, zinc storage is apparently not a major mechanism in attaining homeostasis, the exception being cyanobacteria, which detoxify and store zinc in a metallothionein. A more common way of ridding the cell of excess zinc is by exporting it. The importance of this is clearly illustrated by the highly Zn -resistant bacterium, Ralstonia metalUdurans, isolated from a decantation tank in a zinc factory, and which has a minimal inhibitory Zn " ... 

Silver [7440-22-4], Ag, as an active material in electrodes was first used by Volta, but the first intensive study using silver as a storage battery electrode was reported in 1889 (5) using silver oxide—iron and silver oxide—copper combinations. Work on silver oxide—cadmium followed. In the 1940s, the use of a semipermeable membrane combined with limited electrolyte was introduced by Andm in the silver oxide—zinc storage battery. 

Metalloporphyrins electrical properties, 144 in oxygen production from water, 522 photochemical properties, 510 in photoproduction of hydrogen from water, 511, 510-513 structure, 615 Mctallothioncins cobalt(II), 673 copper and zinc storage, 672 EXAFS, 673 mammals... 

Metallothioneins are involved in zinc homeostasis in chick, rat, and calf. When zinc is present at high dietary concentrations, a temporary zinc storage protein aids in counteracting zinc toxicity. Zinc absorption in mice is directly proportional to intestinal metalloth-ionein levels and implies a significant role for metallothionein in zinc absorption. Chick embryo hepatic metallothionein is highly... 

EPCR is used in the charging of silver-zinc storage batteries, to prevent, or to delay, the formation of spongy and dendritic deposits of zinc [20, 21]. It is impossible to obtain smooth deposits of zinc from alkaline zincate solutions during prolonged deposition at a constant rate due to formation of spongy deposits at lower and dendritic deposits at higher overpotentials [21, 22]. 

NO mediates zinc release from the zinc-storage protein metallothionein via S-nitrosation and subsequent formation of disulphides (Kroncke et al. 1994). Culture of rat islet cells for 24 h in the presence of nontoxic concentrations (0.5 mM) of the slow-releasing NO donor diethylenetriamine/NO resulted in a significantly reduced Zn -dependent Zinquin (25 [iM) fluorescence (Tartler et al. 2000). 

Nickel-zinc storage cells Nickel-hydrogen storage cells Chlorine-zince storage cells Sulfur-sodium storage cells Iron sulfide-lithium storage cells Zinc-air cells Iron-air storage cells... 

In the past decades several new types of storage cells have been developed. The studies on nickel-zinc storage cells are widely known. 

Fig. 4. Schematic of the system with chlorine-zinc storage cells.

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