Microscope components

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    Barnacles are small crustaceans with hard shells made of chitin containing a small soft creature. This shell is a structural adaptation that helps them survive because it protects them from predation and other harms such as being crushed. (Anthoni, 2007) They filter water with their legs when they are submerged to eat plankton. When the tide goes down again, they close a ‘door’ in their shells to trap water inside. (Whoi education, 2014) This is another structural adaptation that stops them from…

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    Shark culling is a state government implemented policy in which sharks within the vicinity of a beach can be legally killed through shark nets or drumlines or a combination of the two. Drumlines are unmanned buoyant drums anchored one kilometre of a beach's shoreline. In between the drums are ropes with hooks. Drumlines are baited so that if a shark is swimming in the vicinity of a beach it would be attracted to the bait and not humans. Each state has different policies on drumlines depending on…

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    Chromium (Cr) is one of the most toxic chemical compounds due to the common use of chromium compounds in industry in addition to its natural sources (Costa et al., 2003). Exposure to chromium occurs via contaminants found in drinking water and food, through air containing particulates or mists of hexavalent chromium Cr (VI) compounds, or through skin contact with soil at hazardous waste sites (National Institute for Occupational Safety and Health, 2013). Cr (VI) may be found in drinking water…

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    There are many different ways medical technology has progressed over the last one hundred years in Canada. The discovery of insulin helped doctors save many lives. The invention of the electron microscope changed the way scientists were able to view many different things including very small organisms. The invention of the external pacemaker saved many lives back in 1950, one of the inventors needed his own invention to save his life for some time. The discovery of the Cystic Fibrosis also…

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    Technical Review of Hydrothermal Formation of Calcium Copper Tetrasilicate Introduction Scanning electron microscopy (SEM) is used to obtain close-up images of samples with depth enabling high quality, 3D depictions on a microscopic level. It has been historically used to identify samples of interest such as bacterial biofilm, microtexture surfaces, and even cancer cells for diagnosis.[1, 2, 3] The first high magnification SEM was reported in a journal in 1938 by Ardenne after developing the…

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    Levofloxacin cocrystals were prepared by solvent evaporation method. The drug and co formers, stearic acid and sodium saccharin were physically mixed in varying ratios of 1:1, 1:3, 1:5, 1:7 and 1:1 and 2:1 respectively in a glass mortar and the mixtures were dissolved in ethanol as solvent for crystallization. The solvent evaporation was carried in rotary flash evaporator (Laborota 4000, Hiedolph) maintained at 40 ± 2ºC and speed of 30 rpm. The products obtained were dried in a desiccator and…

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    goal was set to “maximize” mode. The optimum parameter which was predicted by the RSM model was then validated experimentally in triplicates. 2.5. Scanning Electron Microscopy analysis of scaffold: The scaffold was examined under scanning electron microscope (SEM) (ZEISS EVO 18) under acceleration voltage of 10 kV. The uncoated sample was used for SEM…

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    The first scanning electron microscope (SEM) was invented by Manfred von Ardenne in 1937 (McMullan). However, further development of the SEM was accomplished by Charles Oatley and his colleagues at Cambridge University (McMullan; Egerton 17). He and his colleagues acquired their first images from the SEM in 1951 (Egerton 17). The SEM was developed because if a TEM is utilized, a specimen must be made extremely thin to prevent the electrons from dispersing inside the specimen and so the electrons…

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    Kanamycin sulphate and rifampicin were purchased from Hangzhou Dayangchem Co., Ltd., Zhejiang, China. Acetonitrile and ethanol (High performance liquid chromatography, HPLC, grade) were purchased from Merck, Germany. Sodium dihydrogen phosphate, phenylisocyanate, triethylamine, orthophosphoric acid (analytical reagent grade) and silicone oil (viscosity 10 cSt) were purchased from Sigma–Aldrich, St. Louis, USA. Size 3 hard gelatin capsules were kindly donated by Capsugel Co., Ltd., Tokyo, Japan.…

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    Essay On Drum Set

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    It is hard to picture the Beatles without Ringo or Led Zeppelin without Bonham. These drummers many not be front and center, but they are the back bone to the band. And without the Drum set these drummers would have never been. Jazz or Rock n Roll or Pop music wouldn’t be the same without the invention and evolution of the drum set. The drum set took over a century to become what it is today. The drum set is an American instrument and through its development it has reflected the way America has…

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