Plan:- Independent Variable- Temperature is what I will be changing in the experiment. I want to find out what effect temperature has on the permeability of a cell membrane. Controlling other Variables- I will use measures to ensure that everything stays the same in my test to gain the best and most reliable results possible - Same volume of water that I put the beetroot into after heating. - The beetroot I use will be the same size each time‚ I will ensure this using a cork borer. - The beetroot
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MOVEMENT ACROSS MEMBRANES Intracellular fluid Extracellular fluid Pond water Blood plasma K+ A- ClNa+ Cl+ K+ Na+ Cl- Na+ Na+ Gill epithelial cell Intestinal epithelial cells Cl- Cell membrane Anionic proteins (a) Ion concentration inside a single animal cell (b) Ion concentration across gill epithelium of a freshwater fish Blood capillary Intestinal lumen Glucose from meal Cross section of small intestine (c) Glucose transport across intestinal epithelium into
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acid (measured to 0.001g) and dissolve in 50 – 100mL of water. It may be necessary to warm the solvent to affect complete dissolution. Add a drop or two of phenolphthalein indicator and titrate to an end point with an accurately know standardized solution of sodium hydroxide‚ usually 0.1000M. If your unknown is insoluble in water‚ dissolve 95% ethanol or a water/ethanol mixture. If ethanol is the major solvent‚ use bromothymol blue as the indicator‚ since it gives a sharper endpoint than phenolphthalein
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Name Naza Moore ID# 24120389 Lab# 2 Lab instructors Alecia Palmer and Donald Burke Course Instructor Maureen Wilson Lab Title Preparation of cyclohexene from cyclohexanol Aim Preparation of an Alkene by dehydration of an alcohol in the presence of a catalyst. Calculate the percentage recovery of products. Test for purity and identification of products. Abstract Cyclohexene and cyclohexanol are both colourless aromatic compounds. The major difference between the two is the presence
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Aim: To investigate how effect of Detergent Concentration (cont.) has on Membrane permeability of Beetroot cells. Hypothesis: I predict that as detergent concentration increases‚ the solution will become less clear‚ plus mass increases. The increases in mass will indicate that the water potential of the Beetroot cell is lower than that of the surrounding sucrose solution. The Beetroot discs will become flaccid and decrease in mass if the water potential of the surrounding solution is lower than
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Introduction In this Lab the students dealt with Osmosis‚ movement of water molecule or solvent from a high concentration to a low concentration‚ through selective permeability‚ a protective barrier that provide some particle the ’direct ’ passage in and out of the plasma membrane ( Lacerda L.2011) Allowing some molecules enter and exit the cell membrane‚ to create a balance in concentration inside and outside of the cell‚ by doing so the cell often become hypotonic‚ where the concentration
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different things. Most farms are using fertilizer or other additives in their agriculture but there are also farms that are completely natural and organic. Depending on your beliefs‚ you may think organic is better than industrial and vise versa. Each has its own pros and cons. The use of organic practices in food and livestock has a positive long term effect on the earth and its environment. In the United States we have about 313‚000‚000 people (Census). To effectively feed all the people‚ shortcuts
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Table of Contents Abstract Introduction Aim Hypothesis Material Method Results Discussion Conclusion Abstract The aim of this experiment was to see whether different temperatures will affect the cell membrane‚ thus would then releases the purple pigments out of the vacuole which causes the leakage of the purplish liquid. Background Information The outermost layer is the cell wall‚ which is present only in plant cells and is made up of a carbohydrate called cellulose and also has
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Structural Effects on Stability and Reactivity. Organic Chemstry Laboratory Structural Effects on Stability and Reactivity Introduction The concepts of stability and reactivity are fundamental to understanding chemistry. In this chapter we consider first the thermodynamic definition of chemical stability. We then consider chemical kinetics (Section 3.2) and how it can provide information about reactivity. We also explore how structure influences stability and reactivity. We want to learn how
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Maternal Stress and the Effects on Childhood Development Lonna Larger Ohio University Maternal Stress and the Effects on Childhood Development In conducting my research on developmental studies‚ I had the chance to review many academic journals with many different studies. I chose to read‚ “The Role of Prenatal Maternal Stress in Child Development‚” by Janet A.DiPietro in the‚ Current Directions in Psychological Science journal. The title of the study itself does identify the independent and
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