Thursday, June 28, 2007

Chemical reaction

A chemical reaction is a progression that results in the interconversion of chemical substances. The substance or substances initially involved in a chemical reaction are called reactants. Chemical reactions are characterized by a chemical change, and they yield one or more products which are, in general, unlike from the reactants. Classically, chemical reactions include changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds, although the general concept of a chemical reaction, in particular the notion of a chemical equation, is applicable to transformation of elementary particles, as well as nuclear reactions. On the classical meaning, therefore, there are only two types of chemical reaction redox reactions and acid-base reaction. The former involve the motion of lone electrons and the latter of an electron pair.

Different chemical reactions are used in combinations in chemical synthesis in order to get a preferred product. In biochemistry, series of chemical reactions aided by enzymes form metabolic pathways, since straight synthesis of a product would be energetically impossible in situation within a cell. Chemical reactions are also divided into organic reactions and non-living reactions.

Thursday, June 21, 2007

Honey

Honey is a sweet and thick fluid produced by honey bees from the nectar of flowers. According to the United States National Honey Board and various international food system, honey stipulates a pure product that does not allow for the addition of any other substance...this includes, but is not limited to, water or other sweeteners. This article refers exclusively to the honey produced by honey bees honey twisted by other bees or other insect have very different properties. Honey is significantly sweeter than table sugar and has attractive chemical properties for baking. Honey has a typical flavor which leads some people to prefer it over sugar and other sweeteners.

Most microorganisms do not grow in honey because of its low water movement of 0.6[2]. However, it is important to note that honey frequently contains dormant end spores of the bacteria Clostridium outline, which can be perilous to infants as the end spores can transform into toxin-producing bacteria in the infant's immature intestinal tract, leading to disease and even death. The study of pollens and spores in raw honey can determine floral sources of honey. Because bees carry an electrostatic charge, and can attract other particles, the same techniques of melissopalynology can be used in area ecological studies of radioactive particles, sand, or particulate pollution.

Thursday, June 07, 2007

Partrice Luzi

Patrice Luzi Bernardi is a French goalkeeper recently with Liverpool but released by the Anfield club in June 2005. He then signed a contract with Belgian side Mouscron.
Having previously played for Monaco and Ajaccio, Luzi made his Liverpool debut in January 2004 against Chelsea in a 1-0 win. He made two wonderful saves to deny Chelsea, but was left frustrated when he later was left out from the first team. His chances where limited when Liverpool loaned in Southampton's Paul Jones to cover from Jerzy Dudek and Chris Kirkland. Patrice Luzi has been described as a good shot stopper with good handling and distribution.
The SRBs are the largest solid-propellant motors ever flown and the first of such large rockets designed for reuse. Each is 149.16 feet long and 12.17 feet in diameter.