Wave Nature of Light Objective: The purpose of this lab is to investigate interference‚ otherwise known as the diffraction of light. A beam of light acts a wave‚ and we are able to use equations so calculate the wavelength of the light used. The diffraction of a straight edge demonstrates that light waves bend around straight edges‚ allowing light to enter an area of shadow. When waves are superposed‚ they reinforce each other when crests are in phase and cancel out when they are not in phase
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Laboratory Report The Plasma Membrane I. Introduction The Plasma membrane is the edge of life‚ the boundary that separates the cell from its surroundings. It controls the traffic of materials in and out of the cell. (Reece‚ 2011). It is incredibly thin that is very vital in maintaining the integrity of the cell. Not only does the plasma membrane bind the other organelles‚ it also forms a dynamic structure which gives them their remarkable activity and selectivity. (Hickman‚ 2008). Diffusion
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LSM1102 Lab Report Introduction Transformation is a process which involves plasmid DNA being bound to the cell surface and the subsequent uptake of DNA by the cell (Panja et al.‚ 2008). For artificial transformation of E. coli cells with plasmids‚ plasmid DNA has to be extracted from bacterial cells using the High-Speed Plasmid Mini Kit‚ which is then mixed with competent E. coli cells followed by heat shock and the streaking of transformed cells on two different types of agar plate (LB and LB+ampicillin)
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Assuming Beer’s law holds A = ac (3.1) what are the values for %T (percent transmission) and a (absorption coefficient‚ in units of L/mol.cm) for the molecule at the above two wavelengths? Also do the following from Atkins. Exercise 9.16b Estimate the lifetime of a state that gives rise to a line of width a) 200. MHz‚ b) 2.45 cm-1. (Note that lifetime broadening is discussed in Section 9.6 of Atkins‚ pp 350-352. The key equation is E = /‚ where E is
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Homeostasis is an organism’s process of maintaining a stable internal environment to a set point for sustaining life (Editors 2017). Homeostasis keep the internal conditions different from those outside. Homeostasis is important because it maintains a steady body temperature; a steady blood level; hormones; blood pressure. Our blood and body temperature would have dramatic swings without homeostasis. For example‚ Diabetes and its symptoms are examples of when blood sugar levels are out of homeostasis
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Homeostasis‚ in general‚ the sleep-wake cycle is regulated by two separate biological mechanisms in the body which interact together and balance each other. Studies say that high levels of adenosine leads to sleepiness. According to the two process model of sleep regulation the timing and structure of sleep are determined by the interaction of a homeostatic and a circadian process. The original qualitative model was elaborated to quantitative versions that included the ultradian dynamics of sleep
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This lab connects to the biology course through the unit of homeostasis‚ specifically the lesson on sensations. Sensation is the conscious awareness of the stimulus. Additionally‚ a reception receives the stimulus. For the visual response of the lab‚ the photoreceptors (contain light-absorbing visual pigments) are the cones since the subject is present in light (colour). The cones detect and then covert the stimulus into an action potential. The eye obtains the physical stimulus in the form of light
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Section 1: Simply put‚ homeostasis is the maintenance of a constant internal environment in the body. (Givens and Reiss‚ 2002). To look into this definition further‚ according to Walter Cannon‚ homeostasis can be described as the way the brain coordinates body systems‚ with the aim of maintaining a set of goal values for key internal variables (Goldstein‚ 2008). Homeostasis aims to maintain a constant internal environment helping to keep internal conditions at an optimum in order for all cells in
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chemicals before use. Abide by specific warnings and directions. 3. Collect all materials needed for a procedure before proceeding. 4. Perform reactions under the hood when directed. Chemicals may be weighed and prepared at balance or lab tables‚ but tests should be carried out under the hood. 5.Acids and caustic chemicals are stored in the hood. Please do not take these chemicals from the hood. Procedure: PART 1: Metathetical reactions Precipitation reactions A1. Add a
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Organic Chemistry II Lab 9 Fermentation of a Carbohydrate: Ethanol from Sucrose * Introduction Ethanol is one of the oldest alcohols and also the least toxic one. Industrially‚ ethanol is made most economically by hydration of ethylene. However‚ ethanol that is intended for human consumption must‚ by law‚ be prepared by fermentation. By either method‚ ethanol‚ of course‚ has the same formula‚ structure‚ and properties. The fermentation takes place with the assistance of enzymes from yeast
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