arose (Figure 6-91). According to this hypothesis‚ RNA stored both genetic information and catalyzed the chemical reactions in primitive cells. Only later in evolutionary time did DNA take over as the genetic material and proteins become the major catalyst and structural component of cells. If this idea is correct‚ then the transition out of the RNA world was never complete; as we have seen in this chapter‚ RNA still catalyzes several fundamental reactions in modern-day cells‚ which can be viewed as
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BIOLOGY LAB REPORT (UNIT 7: ENZYMES) GENERAL Enzymes are protein that acts as catalyst‚ lowering the activation energy need for reactions to progress in cells. The reaction can still occur without the presence of the enzyme‚ but at a much slower rate. The activation energy is the minimum amount of energy need for a chemical reaction to occur‚ yielding from a given set of reactants. In enzymatic reactions‚ we have substrates which are reactants of reaction bound to an enzyme. While an active site
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Affecting Reaction Rate OVERVIEW Chemical reactions occur at different rates. In this experiment you will consider some of the key factors that influence the rate of a reaction: nature of reactants - particle size temperature concentration catalysts According to the collision theory‚ the rate of a reaction depends on the frequency of collisions between reacting particles. The more frequent the collisions‚ the faster the rate of the reaction. However‚ in order for the collisions to be effective
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FUEL CELL CARS Fuel Cell cars are a major part of the fleet of Zero-Emission Vehicles. The fuel cells are fueled with pure hydrogen and hence they are considered to be zero emission vehicles. Fuel cells have been used on spacecraft for many years to power electric equipment. These are fueled with liquid hydrogen from the spacecraft ’s rocket fuel tanks. Basic Mechanics Fuel cell vehicles turn hydrogen fuel and oxygen into electricity. The electricity then powers an electric motor‚ just like
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CONTACT PROCESS Sulfuric acid is one of the most important industrial chemicals Outline three uses of sulfuric acid in industry 1. The major use of sulfuric acid in Australia is in the manufacture of fertilizers such as ammonium sulfate and superphosphate. Superphosphate is produced by reacting sulfuric acid with rock phosphate. Ammonium sulfate is produced by neutralising ammonia with sulfuric acid. 2. Production of titanium (IV) oxide from titanium minerals eg ilmenite. Titanium is an important
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Oedipus the King The Greek drama Oedipus the King is clearly a tragedy. In the play there are numerous accounts of physical and mental suffering. Although Laius and Jocasta are the catalyst that starts the story in Oedipus the King‚ Oedipus takes the role of the catalyst and becomes the cause of all tragedy to others. In the play Oedipus causes some of his own suffering. Oedipus’s pride gets him into situations that cause him to suffer later on in the play. “He tore the brooches-the
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might say it as organization full of opportunities but for me‚ it is a “CATALYST”. Like in chemistry the catalyst is a substance which fastens the reaction without taking part in the reaction. PDRC is an organization that catalyses students especially from the marginalized group by proper guidelines and facilities. My journey with PDRC began in 2010 A.D‚ it was then when I first came to PDRC with my father in search of the catalyst. I grew up with dream to become a doctor. I was science student in
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PREPARATION OF BIODIESEL FROM WASTE COOKING OIL In partial fulfillment of the requirements for the award of the degree of Bachelor of Engineering in Mechanical Engineering Submitted by Ritesh Shukla Pankaj Singh Bais Ciby Ninan Ankush Deshmukh Under the guidance of Prof. SUSHANT S. SATPUTALEY (Assistant Professor of Mechanical Engineering) Academic Year 2010-11 Department of Mechanical Engineering ST. VINCENT
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Esterification reaction dose not required catalyst. We add some additives like NaAc = Max PPM ‚ OPA = Max PPM ‚ Penta- Erythritol = Max PPM. These additives increases the performance of Polymer Polycondensation reaction is carried out under vacuum and high temperature in the range of 292 to 300 deg C. This reaction is carried out with the help of catalyst. EG is evolved in the reaction. Which we collect as crude EG and distilled off further recycling. The catalyst used in the process is Sb2O3 =
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TERM PAPER OF CHEMISTRY TOPIC: CARBON NANOTUBE Submitted to Submit by: Mr. Balwant Singh Bhist Mr.Shailja Kant yadav Deptt. Of CHEMISTRY Roll. No. : - A02
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