### process:

Reaction
* Every reaction is regulated by an enzyme which specialized protein that acts as a catalyst.
* Many reactions are reversable so that reactants and products switch positions
  - used in qualitative chemistry
  - consist of both a forward and reverse reaction occurring simultaneously
  - govern iron availability and contribute to the complexity of iron chemistry in soil
* Many reactions involve combination or interaction of two or more reactant molecules
  - the transfer of hydrogen ions between reacting ions, molecules, or atoms
  - involving metal-sulfur bonds and oxygen, however, are highly endothermic
* Many reactions occur in water solutions
  - within the cell
  - result from sunlight shining on the skin
* Most reaction affects chemistry
  - creates electromagnetic energy
  - generates kinetic energy
* Most reaction involves chemical compounds
  - gases
* Most reaction involves in energy
  - photosynthesis
* Most reaction occurs in atmospheres
  - within physiological temperature
* Most reaction produces energy particles
  - uses chemical energy
* Most reactions are reversible
  - go faster at higher temperatures
  - happen soon after contact with an allergen
  - have a reaction mechanism
  - involve the body purging itself of toxins
  - occur by mechanisms with more than one elementary step
* Some reaction absorbs heat energy
  - contains polymerases
* Some reaction creates covalent bonds
  - oxygen gases
  - is produced by electric current
* Some reaction occurs in animals
  - chloroplasts
  - membranes
  - mitochondria
  - organs
  - respiration
* Some reaction produces fission products
  - hydrogen gases
* Some reaction releases chemical energy
  - electrical energy
* Some reactions are harmful because they create additional stress
  - likely to occur also in mitochondria
* Some reactions give off a lot of heat while other use up a lot of heat
  - out energy
  - occurring in stars are neither pure fusion nor pure fission reactions
* affects areas
* are harmful when they create additional stress
  - secondary to increases in by products of lipooxygenase pathway
* can affect the eyes, nose, throat, lungs, skin, and gastrointestinal tract.
* can occur between two types of chains as well as between the reacting monomers
  - due to the release of toxins into the circulatory system
  - only occur if molecules get close enough together to collide
  - result in the formation of completely new chemicals
* causes sickness
  - symptoms
* chemical action
* converts carbohydrates
* creates compounds
* depends on factors
  - many factors
* generates energy
* gives off energy
* has consequences
  - negative consequences
  - properties
  - steps
* illustrates types.
* includes fatigue
  - fevers
  - mild fevers
  - pain
  - sterile water
  - trouble
* induces development.
* involve energy changes as chemical bonds are broken and new chemical bonds are formed
  - nucleus instead of electrons
  - sharing or transferring outer electrons
  - transfer of electrons
* involved in initial breakdown of energy-rich nutrients occur in the cytosol.
* involves bonds
  - different substances
  - exchanges
  - isotopes
  - splits
* involving methylcobalamin include biosynthesis of methionine, methane, and acetate.
* is catalyzed by a ribozyme, which is part of the larger subunit.
* is caused by exposure
  - conservatism
  - forces
  - ideas
  - process of responding to a security incident
  - resistance
  - responses
  - the body's response to adjustment
* leads to fevers
  - oxidation
  - severe sickness
* needs energy.
* occur more rapidly when the density is high
  - when corrosives leak from their containers and drip or flow to other products
* occurs and energy is released as new bonds form.
* occurs at same time
  - sites
  - disks
  - locations
  - organisms
  - reductions
  - several steps
* occurs under anaerobic conditions
  - difficult conditions
* occurs within normal physiological temperature
* often can release or absorb energy during the process.
* proceed in the body according to the energy difference between reactants and products.
  - high energy particles
* provides energy
  - power
* reduces environments.
* relates to activities.
* releases oxygen.
* requires activation energy
* shows photosynthesis.
* spreads to sources
  - water sources
* take place and generate secondary particles
  - in which substituents bonded to a boron cage change positioin
* tend to be exothermic - spontaneous and irreversible in natural environments.
* usually occur more rapidly when the reactants are in the gaseous state.
+ Chemical reaction
  * Some reactions are very fast, and others are very slow. Some happen at different speeds, depending on temperature or other things. For example, wood does not react with air when it is cold, but if it is made hot enough, it will start to burn. Other reactions such as Nuclear Reactions differ in the way that Nuclear Reaction does not need a catalyst. They also cannot be stopped, sped up or slowed down.
  * Some reactions give out energy. These are called 'exothermic'. In other reactions, energy is taken in. These are called 'endothermic'
  - synthesis: Chemistry
  * Chemists start to design a chemical synthesis by selecting compounds to combine. These starting compounds are known as reagents or reactants. Chemists use various reaction types to these to synthesize the product, or an intermediate product. This requires mixing the compounds in a reaction vessel. Many reactions require some form of work-up procedure before the final product is isolated. Vogel's Textbook of Practical Organic Chemistry, 5th Edition'. Prentice Hall, 1996
+ Qualitative analysis: Analytical chemistry
  * Many reactions are used in qualitative chemistry. For example, fire or sodium hydroxide can be used to learn what metals are in the compound. The scientist would know what metal was in an unknown compound by the colour of the flame.