A catalyst (Greek: καταλύτης, catalytēs) is a substance that accelerates the rate (speed) of a chemical reaction (see also catalysis). Chemical catalysts, the focus of this article, participate in reactions but are neither chemical reactants nor chemical products. More generally, one may sometimes call anything which accelerates a reaction without itself being consumed or transformed a catalyst (for example, a "catalyst for political change"). Catalyst - Catalysts and reaction energetics. C ...

Including:

• Catalyst - Catalysts and reaction energetics
• Catalyst - Types of catalysts
• Catalyst - Poisoning a Catalyst
• Catalyst - Commonly used catalysts

Read more here: » Catalyst: Encyclopedia - Catalyst

See also:

Catalyst, Catalyst - Catalysts and reaction energetics, Catalyst - Types of catalysts, Catalyst - Poisoning a Catalyst, Catalyst - Commonly used catalysts

Read more here: » Catalyst: Encyclopedia II - Catalyst - Types of catalysts

catalyst: A person or thing acting as a stimulus upon another, whose presence brings about change. Difficulties can be a catalyst for spiritual unfoldment. Catalyst is sometimes used to name a teacher or facilitator.

(See also: Catalyst, Hinduism, Body Mind and Soul)

A Ziegler-Natta catalyst is a catalyst used in the production of unbranched, stereoregular vinyl polymers. Ziegler-Natta catalysts are typically based on titanium tetrachloride and the organometallic compound triethylaluminium. These catalysts were discovered in the 1950s by Karl Ziegler, who used a mixture of the above compounds to catalyse the polymerisation of ethylene. Giulio Natta, using the same mixture to catalyse propylene, discovered that the process gave a stereoregular pol ...

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The following steps will help you make the shift from ineffective good intentions to being a powerful catalyst for positive change. With this approach you are very likely to see results, which is important because when we see that we've had an impact, we have more faith in our spiritual power. With faith, our power increases and our Area of Power expands.

Read more here: » Personal Growth: Discovering Your Area of Power

A catalytic converter is a device used to reduce the emissions from an internal combustion engine. Most commonly used in an automobile's exhaust system, catalytic converters are now commonly used on generator sets, forklifts, mining equipment, trucks, buses, trains, and other machines that have engines to provide an environment for a chemical reaction where unburned hydrocarbons are more completely combusted. Automobile converters use platinum or palladium and rhodium as catalysts. Hence the combustion (redox) process continues, but o ...

Including:

• Catalytic converter - Purpose and function of catalytic converters
• Catalytic converter - Catalyst Poisoning
• Catalytic converter - Technical details
• Catalytic converter - Regulations
• Catalytic converter - Patents

Read more here: » Catalytic converter: Encyclopedia - Catalytic converter

Acid-base reaction theories pH Self-ionization of water Buffer solutions Systematic naming Redox reactions Electrochemistry Acids: Strong acids Weak acids Bases: Strong bases Weak bases The common (Arrhenius) definition of a base is a chemical compound that absorbs hydronium ions when dissolved in water (a proton acceptor). An alkali is a special example of a base, where in an aqueous environment, h ...

Including:

• Base chemistry - Common bases
• Base chemistry - Bases and pH
• Base chemistry - Characteristics of Bases
• Base chemistry - Neutralization of acids
• Base chemistry - Alkalinity of non-hydroxides
• Base chemistry - Bases as heterogeneous catalysts

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In physical chemistry, chemical kinetics or reaction kinetics study reaction rates in a chemical reaction. Analysing the influence of different reaction conditions on the reaction rate gives information about the reaction mechanism and the transition state of a chemical reaction. Peter Waage developed the law of mass action in 1864 that stated for the first time that the speed of a chemical reaction is proportional to the quantity of the reacting substances. Chemical kinetics - Rate of reaction. Kine ...

Including:

• Chemical kinetics - Rate of reaction
• Chemical kinetics - Factors that influence the rate of a reaction
• Chemical kinetics - Concentration
• Chemical kinetics - Physical state
• Chemical kinetics - Temperature
• Chemical kinetics - Catalysts
• Chemical kinetics - Equilibria
• Chemical kinetics - Enthalpy

Read more here: » Chemical kinetics: Encyclopedia - Chemical kinetics

In chemistry and biology, catalysis is the acceleration of the reaction rate of a chemical reaction by means of a substance, called a catalyst, that is itself not consumed by the overall reaction. The word is derived from the Greek noun κατάλυσις, related to the verb καταλύειν, meaning to annul or to untie or to pick up. The chinese symbol for catalyst is the same as the one for marriage broker. Catalysts accelerate the chemical reaction by providing a lower energy pathway between the reac ...

Including:

• Catalysis - Important catalytic processes

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Catalytic Reformer is a reformation technique where light petroleum distillate (naphtha) is contacted with a platinum containing catalyst at elevated temperatures and hydrogen pressures ranging from 345 to 3450 kPa (50 to 500 lb/in2 gauge). This process, also called the UOP Platforming ™ Process, produces a high octane liquid product that is rich in aromatic compounds. Chemical hydrogen, light gas, and liquified petroleum gas (LPG) ...

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In chemistry a chemical transformation shows the conversion of a substrate to a product omitting the reagents and catalysts or underlying reaction mechanism as opposed to a chemical reaction. The phrase Chemical transformation is used in a more general sense when reaction specifics are not relevant or not available. The IUPAC Nomenclature for Transformations is based on this type of transformations. Categories: Chemical processes | Chemical reactions

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Castor wax, also called hydrogenated castor oil, is a hard, brittle, vegetable wax. It is produced by the hydrogenation (chemical combination with hydrogen) of pure castor oil, in the presence of a nickel catalyst. It is odorless and insoluable in water. Castor wax - Uses. Castor wax is used in polishes, cosmetics, electrical capacitors, carbon paper, lubrication, and coatings and greases where resistance to moisture, oils and other petrochemical products is required. Including:

• Castor wax - Uses
• Castor wax - Properties

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Biosynthesis - Biosynthesis. is a phenomenon where chemical compounds are produced from simpler reagents. Biosynthesis, unlike chemical synthesis, takes place within living organisms and is generally catalysed by enzymes. The process is vital part of metabolism. The prerequisites for biosynthesis are: Precursor substances Energy (usually in the form of ATP) Often required components include: Catalysts, usually enzymes Reduction equivalents (i ...

Including:

• Biosynthesis - Biosynthesis

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The Bergius Process is a method of getting liquid hydrocarbons from lignite by hydrogenation. It was first discovered by Frederick Bergius in 1921. Bergius process - The Process. Get hydrogen from coal with watergas reaction or partial oxidation of natural gas(Syngas). Grind lignite coal to the fineness of dust. Mix dust in heavy oil (from process) - 50/50 mixture is ok. Add a little iron oxide or nickel catalyst. The coal dust/oil mixture is pumpable to reactor ...

Including:

• Bergius process - The Process
• Bergius process - Future

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The Bangladesh Awami League (বাংলাদেশ আওয়ামী লীগ Bāŋlādeś Āowāmī Līg) or the Bangladesh People's League is the main opposition party in Bangladesh and the political catalyst for Bengali discontent and rebellion in 1971. In the 2001 general election it got 40% of the vote and 62 of 300 seats, making it the ...

Including:

• Bangladesh Awami League - Pre-Independence History
• Bangladesh Awami League - Post Independence
• Bangladesh Awami League - External link

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Definition and meaning of catalyst:

catalyst - a substance that accelerates a chemical reaction, but is not consumed or changed in the process

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

Also see these pages: Oceanography, Oceanography Sitemap, Coral Reef, Environment, Sustainability, Climate Change,

For more dictionary entries, see » Catalyst Dictionary

The Catalyst team is composed of specialised science-journalists, each with different specialisations and roles. Catalyst TV series - Presenter. Karina Kelly, science journalist. Catalyst TV series - Reporters. Mark Horstman, tropical biologist. Dr Jonica Newby, vetinary scientist. Dr Richard Smith, marine biologist. Maryke Steffens, microbiologist. Dr Paul Willis, palaeontologist. Catalyst TV series - Execut ...

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Catalyst TV series, Catalyst TV series - The Catalyst Team, Catalyst TV series - Presenter, Catalyst TV series - Reporters, Catalyst TV series - Executive Producer, Catalyst TV series - Series Producer, Catalyst TV series - External link

Read more here: » Catalyst TV series: Encyclopedia II - Catalyst TV series - The Catalyst Team

Most models have basic layer 2 functions and are capable of switching Ethernet frames between ports. Commonly found additional features are VLANs, trunking (Cisco proprietary ISL or IEEE 802.1Q) and QoS or CoS. The switches, whether IOS or CatOS, are fully manageable. Any Catalyst that runs IOS is also capable of functioning as a Router, making them layer 3 devices -- couple this with TCP and UDP filtering, and IOS-enabled switches are capable of layer 2-4 operation. Depending on the exact software image, a Catalyst that runs IOS may be able to tackle large-scale enterprise routing tasks, ...

See also:

Catalyst switch, Catalyst switch - Operating Systems, Catalyst switch - Interfaces, Catalyst switch - Features, Catalyst switch - Models

Read more here: » Catalyst switch: Encyclopedia II - Catalyst switch - Features

Cisco Systems has developed its series of switches under the Catalyst name. The Cisco Catayst 6500 Series is a chassis-based switch family. [1] This series can support interfaces up to 10-Gigabit Ethernet in speed and redundant Supervisor modules. The Cisco Catalyst 4900 series is a fixed-configuration switch. [2] Uplink interfaces are either SFP ports or 10 Gigabit Ethernet, with 48 copper ports of 10/100/1000 Ethernet. The Cisco Catayst 4500 Series is a chassis-based switch family. [3] This series can support uplinks up to 10 Gbit/s in speed and redundant Supervi ...

See also:

Catalyst switch, Catalyst switch - Operating Systems, Catalyst switch - Interfaces, Catalyst switch - Features, Catalyst switch - Models

Read more here: » Catalyst switch: Encyclopedia II - Catalyst switch - Models

The catalytic converter consists of several components: The core, catalyst support, or substrate. In modern catalytic converters this is most often a ceramic honeycomb, however stainless steel foil honeycombs are also used. The purpose of the core is to "support the catalyst", and therefore it is often called a "Catalyst Support". The washcoat. In an effort to make converters more efficient a washcoat is utilized, most often a mixture of silicon and aluminum. The washcoat when added to the core forms a rough, irregular ...

See also:

Catalytic converter, Catalytic converter - Purpose and function of catalytic converters, Catalytic converter - Catalyst Poisoning, Catalytic converter - Technical details, Catalytic converter - Regulations, Catalytic converter - Patents

Read more here: » Catalytic converter: Encyclopedia II - Catalytic converter - Technical details