The endocrine system is a control system of ductless glands that secrete chemical "instant messengers" called hormones that circulate within the body via the bloodstream to affect distant cells within specific organs. Endocrine glands secrete their products immediately into the blood or interstitial fluid‚ without storage of the chemical. Hormones act as "messengers‚" and are carried by the bloodstream to different cells in the body‚ which interpret these messages and act on them. Typical endocrine
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1.According to the kinetic theory‚ both the particles in gases and the particles in liquids have kinetic energy. This energy allows the particles in gases and liquids to flow past one another‚ as shown in Figure 13.5. Substances that can flow are referred to as fluids. The ability of gases and liquids to flow allows them to conform to the shape of their containers. Figure 13.5 Both liquids and gases can flow. The liquid on the left is colored water. The gas on the right is bromine vapor. If a
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Affects On Nutrition on Babies Kyaw Soe Han Tacoma Community College Lifespan Psychology 200 Professor Brewer 1st May 2015 Nutrition is not only the greatest environmental influence on babies since in the womb and during infancy but also throughout the years of life. Nutrition also plays a role in shaping mental health and physical health. Substantial amount of nutrient is required when the neural plate and neural tube forms. Results that are obtained from animal models testing and some
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100 = .87 % Trial #2 (0.009 g / 0.536 g) x 100 = 1.68 % Questions and Answers 1) In the standardization of the Na2S2O3 solution‚ if you did not titrate the liberated iodine immediately‚ how would this likely have affected the value of molarity you calculated? If we did not titrate the liberated iodine immediately the liberated I2 would go out of the
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48 2.3 Sample Calculation Trail #2: (D=M/V) D=3.47/1.7 D=2.04 Part B: Measurement of Kernel Damage Procedures: Measure out 10-15 g sample of unpopped kernels and place in beaker. Add iodine solution to completely cover the kernels‚ swirl them in the solution. After 2 minutes‚ pour off iodine solution and rinse kernels with water‚ pour off water. Place kernels on paper towel and sort damaged from undamaged kernels. Calculate % of damaged kernels. # Kernels Damaged 0 Number of kernels
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expectancy is about five years‚ but with treatment there should be no change in life span. There are five treatments for thyroid cancer and they are typically successful in killing the cancer. These treatments include surgery‚ hormone control‚ and use of iodine‚
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Abstract This experiment was carried out to perform staining methods on microbes‚ explain the mechanisms of staining‚ namely‚ simple staining‚ and learn how to use the microscope. The experiment setting was kept as sterile as possible when conducting the experiment. The microbes under the microscope were drawn out and labelled. In conclusion‚ different staining techniques are used to determine the presence of certain exterior structures of the bacteria like the cell envelope or just to identify
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Uses of radioisotopes Nuclear Power Note: nuclear power works by radioactivity “Radioisotopes are naturally occurring or synthetic radioactive form of an element. Most radioisotopes are made by bombarding a stable element with neutrons in the core of a nuclear reactor. The radiations given off by radioisotopes are easy to detect. Most natural isotopes of relative atomic mass less than 208 are not radioactive. Those from 210 and up are all radioactive.”(Radioisotope - Hutchinson Encyclopedia)
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high oxidative stability and having a long self life (Edem‚ 2002). Palm oil is also rich in β-carotene which helps to prevent liver and lung cancer (Murakoshi et al.‚ 1992). The food value of the edible lipids also depends on chemical properties like iodine value‚ peroxide value‚ p-anisidine value‚ acidity etc‚ as well as on some physical properties like solidification temperature‚ color‚ appearance etc. Lipid oxidation is an important deteriorative reaction‚ which has significant implications in
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spectacles • A fume cupboard • Heptane • Water • Potassium Permanganate • Iodine • 2 test tubes • 4 small flasks Method: (Wear safety specs and lab coats) • Prepare 4 small flasks containing: • A Heptane • B A weak solution of potassium permanganate‚ made by putting a few crystals of KMnO4 in 100 ml of water. Dilute this with more water until it is the same colour as D • C Water • D Iodine in heptane. Dissolve a few crystals of iodine in heptane until the colour in the same as in B Then (in a fume cupboard):
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