permeability of the cell membrane is disrupted causing cellular contents to leak out. When cells are cut‚ the cell membranes are mechanically ruptured. High temperature disrupts the structure of proteins and certain chemicals such as acetone and methanol dissolve the phospholipids‚ leading to damage of the membrane and therefore leads to increased permeability. Beetroot is the material used in this experiment to demonstrate the effects of high temperature and chemicals on the permeability of the
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This could be improved by adding more methanol to the mixture before isolation. The mixture could also stay in the water bath for longer than 45 minutes to allow an adequate time for the tartaric salt to form. An extra 30ml of methanol was added to this experiment to get the tartaric salt to form and if more methanol was added‚ a higher percentage yield might have been obtained. The literature value for the melting point of
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Fluid Mechanics 2nd Year Mechanical and Building Services Gerard Nagle Room 387 gerard.nagle@dit.ie Phone Number: 01 402 2904 Office Hours: Wednesday’s‚ 2.00pm to 5.00pm Fluids In every day life‚ we recognise three states of matter‚ Solid‚ Liquids and Gas. Although different in many respects‚ liquids and gases have a common characteristic in which they differ from solids; they are fluids‚ lacking the ability of solids to offer permanent resistance to a deforming force. Fluids flow under the
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This usually means the cell is dead. In this experiment‚ you will test the effect of three different alcohols (methanol‚ ethanol‚ and 1-propanol) on membranes. Ethanol is found in alcoholic beverages. Methanol‚ sometimes referred to as wood alcohol‚ can cause blindness and death. Propanol is fatal if consumed.
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CHAPTER ONE 1.0 INTRODUCTION Natural rubber is produced by over 2000 plants species and its main constituent is poly (cis-I‚4-isoprene).a highly unsaturated hydrocarbon. Since 1914 there have been efforts to investigate microbial rubber degradation: However‚ only recently have the first proteins involved in this process have been identified and characterized and have the corresponding genes cloned. Analysis of the degradation product of natural rubber and synthetic rubbers isolated from various
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to consistency (soupy is viscosity betow 5OOO cps; too stiffis viscosity above 6000 cps). Tastes Bad and Off Color seem to be related to raw materaats. One of the production operators believes that the consistencv ol the ice cream (measured by the ice cream’s viscosity) is related to the len;th of time in the freeze machine. she has collected some data but doesn‚t know what to do with it Run Time (min.) 93 Viscosity (cps) 5500 Run Time (min.) 97 Viscosity (cps) 90 89 94 93
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Explosivity of Magma 1. Factors Affecting Explosivity a. Gas Content – higher gas content have more explosive eruptions 2. Viscosity resistance to flow easy flowing magma (low viscosity) – gas bubbles dissipate – erupt effusively High Gas Content + High Viscosity = Explosive Volcanic Eruptions Viscosity Factors - Chemical Composition‚ the more SiO2 present‚ the higher the viscosity - temperature‚ the cooler‚ the more viscous The Higher the M Value
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The Marsh funnel is a simple device for measuring viscosity by observing the time it takes a known volume of liquid to flow from a cone through a short tube. It is standardized for use by mud engineers to check the quality of drilling mud. Other cones with different geometries and orifice arrangements are called flow cones‚ but have the same operating principle. A modern plastic Marsh Funnel In use‚ the funnel is held vertically with the end of the tube closed by a finger. The liquid to be
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FALL 2012 ME 305 FLUID MECHANICS I EXPERIMENT 1 MEASUREMENT OF FLUID PROPERTIES PREPARATION: In this course‚ you will conduct the experiments at the Fluid Mechanics Laboratory‚ by yourselves‚ without any help or instruction from the teaching assistants. You must read the lab sheet thoroughly and understand what you are expected to do (and why) for each experiment‚ before coming to the lab. At the end of each experiment‚ you will have to do certain calculations‚ present and plot (when asked)
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Clay Loading and Dispersion Effects on the Rheological Properties of Unsaturated Polyester Nanocomposites Tony Nguyen (Mentor: Abbas A. Zaman‚ College of Engineering) ABSTRACT The objective of this work is to characterize the influence of clay loading and dispersion effects on the rheological properties of unsaturated polyester composites. Toughened unsaturated polyester (UPE) composites were synthesized by the blending of delaminated clay with unsaturated polyester. Rheological behavior is
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