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One Problem X 10
1,563 wordsThis essay will critically review some of the major uses of renal micro puncture techniques, focusing in particular on the stationary method, free-flow micro puncture and renal micro perfusion, the latter including both in vivo and in vitro methods. The essay will conclude with a short review of other uses of micro puncture. Were and Richards (1924) were the first people to use micro puncture successfully on the kidney. They successfully inserted a micro pipette into the glomerulus of a single a...
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Chemical Reaction Kinetic Energy
633 wordsThe rate of a chemical reaction is the derivative of the extent of the reaction with respect to time, to measure the effect of concentration upon the rate of the reaction of peroxydisulfate ion with iodine ion; to determine the order of the reaction with respect to the reactant concentrations; and to obtain the rate law for the chemical reaction. Four reaction solutions are prepare as: 1 - Dilute 5 mL of 0. 2 M KI solution with 10 mL of distilled water in a test tube, add 3 drops of starch solut...
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Atomic Mass Mass Spectrometer
455 wordsThe moles beginning is traced back to the most basic units of matter, atoms. Since atoms are extremely small, scientists have perplexed a great deal over finding a way to measure atomic mass. They struggled to find a universal container that had the capability to mass atoms. Measuring the mass of one atom on a balance in grams is not practical, because the result in grams is an amount too small to be of any use in the laboratory. Fortunately, a new idea came about. If two or more same amounts of...
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Detector Amplifier Hybrids Te Cooled Detector Amplifier Hybrids Dia
425 wordsCooling In many cases IR detectors are cooled during use. This cooling effects the spectral response, responsibilty and response speed. Spectral response characteristics of PbS, Pb Se, and HgCdTe (MCT) shift to the long wavelength side with cooling while Ge, In As and In Sb shift to the short wavelength side. Also, note that the response speeds of PbS and Pb Se become slower with cooling. Methods of cooling include thermoelectric cooling and dewar cooling using dry ice, liquid nitrogen, etc. The...
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Electric Field X 2
1,267 words... n line 3. Place the plates at 5 cm apart, using the set square making sure that the plates are 2. 5 cm form the centre line. 4. Turn on the EHT 5. Raise the voltage to 1 kV 6. Use the 10 second count, move the GM tube until there is a drop in the background count. Change to 100 s and move the GM slightly until you just get a back group count. 7. Record this result in the table. 8. Repeat step 5 to 7 increasing the voltage by 1 kV Analysis This experiment is similar to an electron gun experim...
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H 2 O X 10
1,265 wordsAvogadro's number is the number 6. 0221367 x 10 ^ 23, commonly rounded to just three significant digits: 6. 02 x 10 ^ 23, and is the number of representative particles in a mole. Avogadro's number is commonly used to compute the quantities of substances involved in chemical reactions, called stoichiometry, and is one of the most important and versatile components of modern chemistry. Avogadro's number is named after the Italian physicist Amadeo Avogadro. Avogadro's number first came about when A...
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Nuclear Energy Uranium Fission
1,199 wordsThousands of years ago human beings learned to make fire. By collecting and burning wood they were able to warm themselves, cook food, and manufacture primitive tools. Later, the Egyptians discovered the principal of the sail. Even more recent was the invention of the water wheel. All of these activities utilize various forms of energy-biological, chemical, solar, and hydraulic. Energy, the ability to do work, is essential for meeting basic human needs, extending the life expectancy, and providi...
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World War Ii Franklin D Roosevelt
1,564 wordsOn the morning of August 6, 1945, the first Atomic Bomb in history was dropped on the Japanese city of Hiroshima. Three days later, a second bomb was dropped on Nagasaki. Soon after, on August 14, 1945, the Japanese abruptly surrendered, abandoning their ancient customs regarding honor in war. The fact that only two bombs were able to bring an entire country to its knees is a true testament to the awesome power they held. There is nothing in modern warfare that can compete with the devastating e...
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Place Value Value System
1,626 wordsThe Development and Use of Zero as a Number The history of the number "zero" is not easy to track, since we have little written evidence. Books were not widely used, even for study, until after the invention of the printing press, which is why we have so little recorded history prior to the fifteenth century. However, it seems that there were several areas of the world involved with using a "zero" by the third century. The Babylonians are generally thought to be the earliest to use a zero, aroun...
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Chemical Reaction Kinetic Energy
865 wordsRates of Chemical Reactions 1: I-Purpose: The rate of a chemical reaction is the derivative of the extent of the reaction with respect to time, to measure the effect of concentration upon the rate of the reaction of peroxydisulfate ion with iodine ion; to determine the order of the reaction with respect to the reactant concentrations; and to obtain the rate law for the chemical reaction. II-Material and: Four reaction solutions are prepare as: -solution 1: 25. 0 mL KI solution 1. 0 mL starch sol...
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Sodium Hydroxide Test Tube
1,291 wordsExperiment showing the determination of Creatinine concentration in 24 -hour urine samples. Aim: The aim of the practical is to test the following hypothesis: The amount of creatinine found in a persons 24 -hour urine sample bears a direct relationship to the body mass of that person. METHOD: Materials: 1) 5 urine samples of unknown concentration numbered 1, 5, 6, 7 ad 8. 2) Picric Acid 3) 0. 75 M Sodium Hydroxide 4) P 1000 Gilson Pipette 5) 1 cm 3, 5 cm 3 and 10 cm 3 glass pipettes 6) Vortex Mi...
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Orbital Magnetic Dipole Orbital Magnetic Dipole Moment Electron
519 wordsThe Discovery Of The Electron The electron was discovered in 1895 by J. J. Thomson in the form of cathode rays, and was the first elementary particle to be identified. The electron is the lightest known particle which possesses an electric charge. Its rest mass is Me equal> 9. 1 x 10 - 28 g, about 1 / 1836 of the mass of the proton or neutron. The charge of the electron is -e = - 4. 8 x 10 ^- 10 esu tro static unit). The sign of the electrons charge is negative by convention, and that of the equ...
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Rate Of Reaction Bunsen Burner
2,301 wordsFor this investigation I am going to investigate the effect of the concentration of an enzyme, in this case Amylase, on the time taken for the enzyme to fully breakdown the substrate, which in this case is starch. The reason why these two enzymes have to be used is because each enzyme is designed specifically to break down only one substrate as each enzyme is made of a protein that causes it to be a specific shape, in this case the enzyme Amylase can only break down starch to dextrin. I am going...
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X 10 S 1
1,147 wordsFluorescence Study of the Kinetics of Energy Transfer Between Dyes 1. Introduction Coumarin 1 and Sodium fluorescein are two dyes which absorb and emit light in the visible region. By using a spectrophotometer we are recording an absorption spectrum and then determining the molar decade absorption coefficients, which will be used later to interpret and analyse the fluorescence spectra. For fluorescence spectra, there are two kinds, the excitation and the emission spectrum. The excitation spectru...
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One Hundred Dollars Federal Reserve System
1,475 wordsInterest Interest Rates Interest Rates Interest is the charge the lenders set for the borrowing of their money. Interest is done in a percentage like five percent or ten percent. So the lender collects their original money along with extra money based on the percentage rate. Business, governments, and consumers borrow money and lend money. History Before the 1500 s most didn t charge for interest because they believed that charging interest was wrong. The Israelites considered lend money without...
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Air Resistance Straight Line
1,374 wordsPlanning The experiment is to determine the horizontal motion of a projectile when launched from a ski slope´ at different speeds. It is thought that the rate at which the ball bearing is released from the slope will affect how far it travels in a horizontal direction. The height up the slope that the ball is released will be proportional to the distance that it travels. Therefore, if the height from which it is released is doubled it will travel twice as far. When the experiment is conduc...
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Degrees Celsius P Amp
815 wordsTitle: Colony Transformation Lab Purpose: To study the behavior of Escherichia coli once it has been introduced to a foreign gene. Hypothesis: If the ampicillin resistant DNA is introduced into the E. coli bacteria, through the uptake of this DNA the bacteria will receive the resistant gene that will permit the bacteria to grow freely in the presence of ampicillin. Experimental Design: By observing the E. coli bacteria one can study how it reacts when a foreign gene such as the ampicillin resist...
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