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Catalytic cycle. In chemistry, a catalytic cycle is a multistep reaction mechanism that involves a catalyst. [1] The catalytic cycle is the main method for describing the role of catalysts in biochemistry, organometallic chemistry, bioinorganic chemistry, materials science, etc. Since catalysts are regenerated, catalytic cycles are usually ...
Ribozyme. 3D structure of a hammerhead ribozyme. Ribozymes ( ribo nucleic acid en zyme s) are RNA molecules that have the ability to catalyze specific biochemical reactions, including RNA splicing in gene expression, similar to the action of protein enzymes. The 1982 discovery of ribozymes demonstrated that RNA can be both genetic material ...
Simulation of flow inside a catalytic converter. A catalytic converter is an exhaust emission control device which converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction. Catalytic converters are usually used with internal combustion engines fueled by ...
An electrocatalyst is a catalyst that affects the activation energy of an electrochemical reaction. [8] Shown below is the activation energy of chemical reactions as it relates to the energies of products and reactants. The activation energy in electrochemical processes is related to the potential, i.e. voltage, at which a reaction occurs.
Economic catalyst. An economic catalyst is an entrepreneur or company that precipitates a fundamental change in business or technology. A more precise definition of a catalyst is based on the new economics of multi-sided platforms. In this literature an "economic catalyst" is an entity that has (a) two or more groups of customers; (b) who need ...
Machine learning (ML) is a field of study in artificial intelligence concerned with the development and study of statistical algorithms that can learn from data and generalize to unseen data, and thus perform tasks without explicit instructions. Recently, artificial neural networks have been able to surpass many previous approaches in performance.
Selective catalytic reduction. Selective catalytic reduction ( SCR) means of converting nitrogen oxides, also referred to as NO. x with the aid of a catalyst into diatomic nitrogen ( N. 2 ), and water ( H. 2O ). A reductant, typically anhydrous ammonia ( NH. 3 ), aqueous ammonia ( NH. 4OH ), or a urea ( CO (NH. 2)