Catalysis

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Catalysis

• Veronika Bacová
• Lenka Rábová

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Catalysis

• process, which runs in a present of calalysts or
  inhibitors
• 3 main types
• homogeneous
• heterogeneous
• microheterogeneous (enzyme)
• autocatalysis

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Catalysts

• chemical substances
• accelerate reactions by facilitating the
  formation of transition state
• alter only the reaction rate and not the reaction
  equilibrium

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How catalysts work?

• active site
• binding substrate
• forming complex
• releasing product
• allowing to bind additional substrate

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How can we influence rate of catalysis?
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Autocatalysis

• special type of homogeneous catalysis
• catalyst is the product of reaction

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Inhibition, inhibitors

• negative catalysis
• chemical substances
• activity of catalyst is inhibited by the binding
  of specific small molecules and ions on the
  substrate
• types reversible
• irreversible

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Reversible inhibition

• competitive bind substrate (CS) or inhibitor
  (CI), not both
• noncompetitive bind inhibitor and substrate at
  different binding sites (CSI)

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Vocabulary

• accelerate urychlovat
• facilitating usnadnení
• transition state transitní stav
• alter menit, upravovat
• rate rychlost
• equilibrium rovnováha
• axis osa
• curve krivka
• despatch urychlení
• decelerating - zpomalení