Developmental Biology 278 (2005) 274 – 288 www.elsevier.com/locate/ydbio Review Friedrich Miescher and the discovery of DNA Ralf Dahm* Max Planck Institute for Developmental Biology‚ Department 3 – Genetics‚ Spemannstr. 35/III‚ D-72076 Tubingen‚ Germany ¨ Received for publication 5 October 2004‚ revised 17 November 2004‚ accepted 20 November 2004 Available online 21 December 2004 Abstract Over the past 60 years‚ DNA has risen from being an obscure molecule with presumed accessory or structural
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Enzymes INTRODUCTION Enzymes are protein cells and they are found in the gut. They help to break down the food you eat. Enzymes are produced by living cells and they speed up reactions because they are biological catalysts. If we did not have enzymes‚ the reactions in our cells would be too slow to keep us alive. This means that they are extremely important for our survival. The properties of enzymes are: ⋆ They can be used many times‚ because they can speed up reactions without
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Was the discovery of penicillin an accident? Who really discovered penicillin? Many believe that penicillin was discovered by Alexander Fleming‚ although he sparked the research for penicillin‚ he wasn’t the first. Penicillin had and still does have an effect on the medical world. Penicillin has a very rich history behind it‚ and it is still used world round. One significant story that led to the discovery of penicillin was the one of Alexander Fleming. Although Alexander Fleming is credited for
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natural sources in developing antibacterial compounds. The need to prevent and control infections as well as the reasonable use of currently available antibiotics is also emphasized. Keywords: Bacterial resistance • Antibacterial compound • Drug discovery • Target • Antimicrobial peptides © Versita Sp. z o.o. 1. Introduction The use of antibiotics‚ especially the excessive and indiscriminative use‚ both in medicine and veterinary science has contributed to the emergence of drug resistant organisms
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Essay 1 The Discovery of Antarctica According to Merriam-Webster dictionary‚ discovery means: “the act of finding or learning something for the first time‚ the act of discovering something.”1 With this definition in hand‚ the discovery of Antarctica is something that may not officially be determined. As it sits now‚ 1820 is the official discovery year with three reported sightings of the continent within months of each other. The speculation over the true discovery date and discoverer of Antarctica
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Discovery of dns Discovery of DNA By: Leslie A. Pray‚ Ph.D. © 2008 Nature Education Citation: Pray‚ L. (2008) Discovery of DNA structure and function: Watson and Crick. Nature Education 1(1) In the attached article‚ Leslie Pray discusses how the discovery of DNA came about and what it took to develop and finally formulate the different forms of what we now call DNA. DNA wasn’t just discovered by 1 or 2 scientists but rather a group of scientist over many different years. She starts off by
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Wan Ching Man 5C(21) Effects of temperature on the activity of lipase Aim: To investigate the effects of temperature on the activity of lipase enzyme on milk which contain fats or lipids. Introduction: Enzyme is a kind of biological catalyst that made up of protein. It can speed up the metabolic reactions on various kinds of substances. Like lipase can break down lipid into glycerol or fatty acids in milk. Since enzyme is made up of protein which easily affected by varies temperature. This
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There can be no doubt that the twentieth century is one of the most remarkable in human history for its previously unparalleled rate of scientific discoveries. In fact‚ there were so many new gadgets invented and discoveries made in the last century that it’s difficult to write the list down. However‚ I think I can say ten innovations or technologies that have had the greatest influence on humanity—both positively and the negatively. First of all‚ I want to remember penicillin: this drug (eventually
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NEHRU’S ‘THE DISCOVERY OF INDIA’ A Brief Study JAGDISH V. DAVE M. N. College‚ Visnagar (NG)‚ Gujarat The Discovery of India is‚ in fact‚ the discovery or Nehru’s rich and graceful personality. It gives us glimpses into the manifold aspects of this great man symbolised for many years the youth of our rejuvenated race awakened after long slumber. What was the essential self of Pandit Nehru? He was a politician by accident as he himself confessed‚ a thinker and a humanist by
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Investigating the Effect of Lipase Concentration on the Breakdown of Fat in Milk INTRODUCTION: Enzymes are proteins which can catalyse chemical reactions without changing themselves. The enzyme lipase breaks down the fat in dairy products such as full-cream milk for people who are lactose intolerant. Lipase acts on its specific substrate‚ lipids produces fatty acids. If enzyme concentration increases‚ random collisions between the substrates and active sites of enzyme increase due to the increasing
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