exchange

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Related to cation exchange: Cation exchange resin, Cation exchange membrane

Exchange

Stock Exchange

A place, whether physical or electronic, where stocks, bonds, and/or derivatives in listed companies are bought and sold. A stock exchange may be a private company, a non-profit, or a publicly-traded company (some exchanges have shares that trade on their own floors). A stock exchange provides a regulated place where brokers and companies may meet in order to make investments on neutral ground. The concept traces its roots back to medieval France and the Low Countries, where agricultural goods were traded for cash or debt. Most countries have a main exchange and many also have smaller, regional exchanges. A stock exchange is also called a bourse or simply an exchange.

exchange


exchange

See swap.

Exchange.

Traditionally, an exchange has been a physical location for trading securities. Trading is handled, at least in part, by an open outcry or dual auction system.

Two examples in the United States are the New York Stock Exchange (NYSE), which has the largest trading floor in the world, and the Chicago Board Options Exchange (CBOE).

However, the definition is evolving. Traditional exchanges handle an increasing number of trades electronically, off the floor. Nasdaq and other totally electronic securities markets, without trading floors, have exchange status.

As a result, the terms exchange and market are being used interchangeably to mean any environment in which listed products are traded.

The term exchange also refers to the act of moving assets from one fund to another in the same fund family or from one variable annuity subaccount to another offered through the same contract.

exchange

see MARKET, BARTER.

exchange

  1. 1the transfer of the right to own or use goods and services. Exchange is necessary in specialized economies (see SPECIALIZATION). In simpler specialized economies, exchange can take the form of BARTER. In more complex specialized economies exchange is undertaken through MARKETS, where the right to own or use goods and services is bought and sold. See TRANSACTION.
  2. the means of financing the purchase of goods and services in a market. See MONEY, FOREIGN EXCHANGE.

exchange

Parties may exchange like-kind properties and not pay any income taxes at the time of the exchange but, instead, defer them until the later sale of the exchanged property. See 1031 exchange.

Exchange

A transfer of property for other property or services. Some exchanges produce currently taxable income while others can be structured so as to defer any tax liability.
References in periodicals archive ?
Less information, however, is available for a combined investigation of cation exchange and nitrogen dynamics in undisturbed soil under unsaturated conditions.
The negative charge means that an anion is repelled from a cation exchange site.
Southwest plant finished water was run through a parallel copper pipe test loop as a control against which the GAC and cation exchange effluents could be compared.
The experimental data showed that both hydrophobic and cation exchange behaviors are active as a retention mechanism.
On the other hand, the optimum moisture content of soil increases with the increase of wood ash content as more water is required for the formation of the lime-like product, Ca[(OH).sub.2], and dissolution of this product into [Ca.sup.2+] and O[H.sup.-] ions, in order to supply more [Ca.sup.2+] ions for the cation exchange reaction.
This is because the association of functional groups when protons are added or generated in the soil eliminates a cation exchange site.
Briefly, 12.5 g of laterite and bentonite were separately taken in a volumetric flask and were mixed with a solution of quaternary ammonium salt equivalent to the cation exchange capacity (CEC) of the clay (84 cmol/kg of bentonite and 52 cmol/kg of laterite).
[Mg.sup.++] (mmol 0.85 0.08 9.75 [Kg.sup.-1]) Cation exchange capacity 5.27 0.77 14.6 (mmol [Kg.sup.-1]) Exchange acidity (mmol 0.32 0.17 53.1 [Kg.sup.-1]) Available phosphorus (ppm) 45.88 6.97 15.2 Total nitrogen (%) 0.81 0.10 1.13 Base saturation (%) 84.90 6.95 8.19 Zinc (%) 0.48 0.34 70.8 Nickel (%) 2.55 0.54 21.2 Copper (%) 0.60 0.22 36.7 Manganese (%) 0.93 0.61 65.6 Source: Field work, 2007 Table 2: Descriptive Statistics of sub soil properties (15-30cm) in the study area Soil Properties Mean Standard Coefficient of Deviation Variation (%) Sand (%) 84.5 8.64 10.2 Silt (%) 8.80 0.38 4.30 Clay (%) 6.70 0.32 4.75 Electrical Conductivity 51.9 17.8 14.8 2 pH (Ca[Cl.sub.2]) 5.67 0.84 14.8 Organic Matter (% ) 0.90 0.29 32.2 Exch.
The particle size analysis of clay dispersions directly after cation exchange was performed by means of a Malvern Instruments mastersizer (Worcestershire, UK).
Is cation exchange a reversible or irreversible reaction?
The columns retain the interferences through non-polar, anion and cation exchange retention mechanisms while the water-soluble acrylamide passes through the column.
Cations are replaced in these systems using cation exchange resins that produce hydrogen ions ([H.sup.+]) and resultant acids.