all‚ penicillin was discovered by a bacteriologist Alexander Fleming. This scientist discovered it by accident. He went away for a while and when he came back a mold was covering all his petri dishes. Fleming did some testing with a particular dish that caught his eye and it was bacteria-free. According to the text it states that‚ “ The mold was a rare spore called Penicillium notatum‚ which had wafted on air currents into his lab from another floor.” Also‚ penicillin is a widely
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software maker followed familiar territory in developing the Xbox using a PC-based design. Powered by a 733-megahertz Intel processor‚ it’s the most powerful console ever created. It even looks cool with its jet-black with an eerie Aliens inspired slime-green "X". A built-in hard drive allows more game information to be saved and players can store their own MP3s for playback during games. With DVD-player capacity‚ which requires a $30 remote the Xbox’s price begins to look warranted. An ethernet
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When and how you encouraged a child to take part in creative activities? In our nursery creative activities are very important. Almost every day i try to encourage children to take part. Acording to my observations use of simpliest resources is the best practise. Recently I use cartboard boxes and the parts from different tipes of packaging as plastic and paper bags‚ plastic bubble sheets‚ cardboard strips and sheets‚ styrofoam and many others. Wery often we use very big carboard boxes to
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The Discovery and Research of Penicillin Alexander Fleming’s discovery of penicillin while examining a stray mold in his London laboratory in 1928‚ and its eventual development by Howard Florey and Ernst Chain at Oxford University‚ created a major break through to another world of antibiotics and medicine. Antibiotics like penicillin have become the most important family of drugs of this era. During the 1940’s (World War 2) penicillin became a life saving drug to thousands of soldier’s‚ it also
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Model aircraft are flying or non-flying models of existing or imaginary aircraft‚ often scaled-down versions of full size planes‚ using materials such as polystyrene‚ balsa wood‚ foam and fibreglass. Designs range from simple glider aircraft‚ to accurate scale models‚ some of which can be very large. Models may be built either as static non-flying models‚ or as flying models. Construction techniques for the two are usually very different. Static model aircraft Fokker F28 Schabak Modelle
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r.A Sound of Thunder by Ray Bradbury Imagine being able to travel back in time. Many writers have explored this idea in science fiction stories and movies. You are about to read one of the most popular_and thought-provoking_stories about time travel ever written. LITERARY FOCUS: STYLE AND MOOD A writer’s diction‚ or word choice‚ greatly defines a work’s style. Style is also determined by sentence length and complexity. A story that is written in brief simple sentences‚ for example‚ is different
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major axes of 2"‚ 3" and 4" is to be die cast in a graphite mold. The mold has a specific weight of 350 lbf/ft3 and outer dimensions of 6" by 6" by 6" as shown in the figure. Note that the parting line of the mold lies on the plane of maximum cross-section of the casting. In this case a clamping force of 7.3 lbf is needed to keep the mold haves from separation. Being a tooling engineer‚ you are asked to re-design the depth of the mold so that there is no need for clamping force in casting this
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• CALIFORNIA BEARING RATIO •PROCEDURE • CALIFORNIA BEARING RATIO Unsoaked Sample 1. Prepare 2 molds of soil(12 kg fine grained passing sieve No.4 or 15 kg depending on compaction standard) at optimum moisture content 2. Take representative sample for moisture content before compacting the soil (at least 100g) and weigh the two molds minus the base plate & collars. 3. Clamp a mold to the base plate‚ insert spacer disk and cover with a piece of filter paper. • CALIFORNIA BEARING
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MATERIAL ENGINEERING – Assignment Question : PART A : You as the mechanical engineer need to produce a connecting rod in the engine. Based on your knowledge of selection process and‚ list all the important factors using a flow chart. Materials Selection and Design is a comprehensive reference on the basic concepts‚ methodologies‚ and information sources dealing with materials selection and its integration with engineering design processes. It makes the connection between design and materials
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with a mold (later identified as Penicillium notatum). He also discovered that the colonies of staphylococci surrounding this mold had been destroyed. He later said of the incident‚ "When I woke up just after dawn on September 28‚ 1928‚ I certainly didn’t plan to revolutionize all medicine by discovering the world’s first antibiotic‚ or bacteria killer. But I suppose that was exactly what I did." He at first called the substance "mold juice‚" and then named it "penicillin‚" after the mold that produced
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