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Catalysts and Catalysis
Catalysts are compounds or elements which take part in a reaction without getting used up themselves.
950 Questions
What is a vasodilator that can be inactivated by a proteolytic enzyme?
Nitric oxide is a vasodilator that can be inactivated by proteolytic enzymes such as superoxide dismutase or hemoglobin. These enzymes can break down nitric oxide, reducing its vasodilatory effects.
Does temperature act as a catalyst?
No, temperature is not a catalyst. A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process, while temperature is a measure of the average kinetic energy of particles in a system. Temperature can affect the rate of a reaction by influencing the frequency of collisions between reactant molecules.
Why is the catalyst made porous?
By making the pellets porous, you maximize the surface to volume ratio of the catalyst, which allows you to use less of it, but get the same effect.
Sugar is not a catalyst because it does not participate in the chemical reaction by lowering the activation energy or being consumed in the reaction. It is often used as a reactant or substrate in various biochemical processes instead of a catalyst.
How do you calculate saturation solubility of cifixime?
To calculate the saturation solubility of cefixime, you typically perform a solubility test in a suitable solvent at a controlled temperature. This involves dissolving a known amount of cefixime in the solvent until no more can dissolve, followed by filtering the solution to remove any undissolved particles. The concentration of cefixime in the saturated solution is then determined using analytical techniques such as UV-Vis spectroscopy or high-performance liquid chromatography (HPLC). The result gives you the saturation solubility in that specific solvent at the tested temperature.
Why is a catalyst more effective in powdered form?
Higher surface area is available for the chemical reaction.
Where in the chloroplast are the enzymes that catalyze the Calvin cycle found?
The Calvin cycle takes place in the stroma of the chloroplast. Carbon dioxide enters the stroma of the chloroplast to combine with the five-carbon compound called ribulose1, 5-Biphosphate to form two molecules of a three-carbon compound called 3-Phosphoglyceric acid. This reaction is catalyzed by an enzyme called Ribulose bi-phosphate Carboxylase.
What are the properties of enzymes?
Enzymes are catalysts in the breaking down of substances by bonding with them briefly. In the case of Hydrogen peroxide they break it down into water and oxygen much faster than it would naturally occur. Inside the body they are used to break down food and to start off the digestion process. Because they are proteins they are affected by the pH level of the substance and also the temperature of the substance. The last important note is that obviously the concentration of the enzyme will affect how well it works.They are substrate specific which is illustrated by the lock and key hypothesis.
Enzyme decomposition is the process where enzymes break down complex molecules into simpler components. This is an important biological process that allows organisms to obtain necessary nutrients from food, as well as to regulate metabolic pathways by breaking down waste products.
What is the meaning of word catalyst?
A catalyst speeds up a reaction by lowering the activation energy of the reaction. It is not consumed by the reaction, but rather it leaves the reaction unchanged.
Can a catalyst change rate of reaction equilibrium position or both?
A catalyst cannot change the equilibrium position. However, it can change its rate.
Conjugated enzymes are enzymes that require a non-protein component, such as a metal ion or a coenzyme, to function properly. These additional components are necessary for the enzyme to catalyze a specific reaction effectively.
Pectinases - Pectinases occur naturally in all fruit - including grapes - and are partly responsible for the ripening process. Grape pectinases are however inactive under the pH and SO2 conditions associated with winemaking.
What effect would a catalyst have on the reaction A2 plus 2B ---- 2AB?
A catalyst would increase the rate of the reaction by providing an alternative pathway with lower activation energy. This would allow the reaction to occur more quickly without being consumed in the process. The equilibrium concentrations of the reactants and products would remain the same.
Are catalysts required for a chemical change to take place?
They are not essential to cause a chemical reaction.
How will this reaction be affected if carbonic anhydrase acts as a catalyst?
h2co3 will be produced faster
Does a catalyst decrease or increase the activation energy required?
The catalyst decrease the needed activation energy.
How is the phase transfer catalyst removed from the product?
(additional)using Aliquat 336 in the synthesis of butyl benzoate from sodium benzoate and 1-bromobutane.
What do cold temperatures do to enzymes?
It usually lowers their effectiveness, i.e. slows the reaction rate.
The diagram below shows a picture of a slankey diagram. Energy is weighed in kj (kilo joules). the electrical energy represents how much energy you started with. The light energy represents how much energy you used for the lights. The heat energy represents how much energy you did not use for the lights but you used it for heat.
