haste than usual. So‚ I will experiment this hypothesis by placing Daphnia under a microscope and recording the heartbeats before pouring the caffeine and after pouring the caffeine. The apparatus used involved culture of Daphnia‚ cotton wool‚ cavity slides‚ dropping pipettes‚ distilled water‚ caffeine‚ beakers‚ stopcock‚ paper towels and a microscope. Before starting the experiment we had to set up the microscope. We then had to catch the Daphnia with a plastic pipette and place them on a cavity
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SCIENTIFIC INVENTION ASSEMBLY LINE: Primitive assembly line production was first used in 1901 by Ran some Eli Olds (1864-1950)‚ an early car-maker (he manufactured the Oldsmobile‚ the first commercially successful American car). Henry Ford (1863-1947) used the first conveyor belt-based assembly-line in his car factory in 1913-14 in Ford’s Highland Park‚ Michigan plant. This type of production greatly reduced the amount of time taken to put each car together (93 minutes for a Model T) from its
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Abstract: There are many different types of cigarettes in the world and although no matter which type is smoked there will be a high carcinogen uptake as well as other chemical resulting in a higher chance of developing cancer and lower cilia beat rates. This experiment took two cigarettes; one with a paper filter‚ and the other with charcoal filter. By taking mollusk gills and placing them in contaminated water from the two different smokes it could be seen that the cilia on the gills had a slower
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Introduction In this experiment I aim to find out if caffeine has an effect on the heart rate of daphnia. Daphnia are water fleas that have a sort of heart that we can see in magnification. We can count the number of heart beats in a minute of a regular daphnia and try and get a new one with the same specifications as the old one that may have died. It is also a good idea to get a new one as we want to see how much it affects it from ordinary instead of adding the caffeine one after another
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Gram Characteristics of Bacteria Introduction Bacteria are interesting little critters in that they are not easily visualized without some sort of stain. In classical methodology‚ two different kinds of stains have been used to identify bacteria: acidic and basic dyes. Acidic dyes are so called because they consist of a salt that has a cation that transfers no color‚ but the anion portion is colored and does give off color. Basic dyes consist of an anion that does not give off any color and a cation
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2) . If a typical membrane is 8 nm wide‚ how many such membranes would have to be aligned up to see in a light microscope? How many with an electron microscope? i) Resolution/resolving power of light microscope = 0.2 nM = 200 nM # Membranes need to be aligned to be seen by light microscope = 200 nM/8 nM = 25 membranes ii) Resolution/resolving power of electron microscope = 2 nM Therefore‚ a single membrane will be visible 3) Human ribosomes are roughly spherical and have a diameter
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Keep wages low‚ avoid benefits‚ etc. Wage work is temporary Cultural expectation to get married and start a family Avoid the inefficiencies that are associated with the deteriorating eyesight of workers After years of looking through a microscope‚ the eye sight begins to go They get migraines At this point‚ women are leaving the start a family Management can tip local structures of patriarchal authority to ensure worker compliance Docile bodies (workers wanna create) Don’t
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the case that are unique to the weapon. When a suspect’s weapon is examined in the lab‚ it will be test fired into a box filled with cotton or a tank of water to provide the examiner with the bullets and cartridges with a known history. Using a microscope‚ the known cartridges are compared with the ones in question. With some patience‚ skill‚ and a little luck‚ experts can definitively say that a certain firearm and no other fired this bullet‚ or ejected this cartridge. The value of luck
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Microbial Diversity and Ubiquity Microorganisms are microscopic organisms that are so small that that they can only be visualized by the aid of a compound-brightfield microscope. While we generally cannot see individual microorganisms with the naked eye‚ they are present in virtually every habitat known to man. Microorganisms can be prokaryotic—the bacteria or eukaryotic—the algae‚ protozoa or fungi. While viruses are acellular they are also studied in the scope of microbiology because
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own microscopes to have a look for themselves but they never found any of the creatures Leewenhoek claimed to have found. They were
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