Activity One: 1. The two major variables that affect the rate of diffusion: a. The composition of the lipid bilayer (eg. more cholesterol‚ less permeability to polar substances) b. The structure of the molecule undergoing diffusion (eg. steric conformation‚ size‚ polarity‚ amount and strength of hydrogen bonding) 2. Urea was not able to diffuse through the 20 MWCO because the pores of the membrane were too small for the urea to pass through. The molecular weight of urea is 60.06 g/mol‚ over
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COURSEWORK (CHEMISTRY) PLANNING: Skill Area P Write down the aim of your Investigation. To investigate the effects of change in concentration on the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid. Briefly describe your Preliminary Experiment and include your results. Explain how these results have helped you plan your main experiment (p8b). An increase in concentration will lead to an increase in the rate of reaction because there will be a greater number of particles per unit/cm3
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PART I. MULTIPLE CHOICE QUESTIONS 1. When the value of the British pound changes from $1.50 to $1.25‚ then the pound has _________ and the dollar has _________. a. appreciated; appreciated b. depreciated; appreciated c. appreciated; depreciated d. depreciated; depreciated 2. When the exchange rate changes from 1.0 euros to the dollar to 0.8 euros to the dollar‚ then the euro has _________ and the dollar has _________. a. appreciated; appreciated
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To investigate the effect of different caffeine concentration on the heartbeat rate of Daphnia at room temperature. Introduction: Caffeine is found‚ and produced in many plant species to function as a natural pesticide‚ and as an inhibitor of seed germination of other nearby coffee seedlings to give it a better chance of survival. Caffeine is able to paralyze and kill certain insects upon feeding on the plants that produce caffeine. Coffee‚ tea and cocoa are common caffeine-containing
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The three year zero rate is 7% per annum and the four year zero rate is 7.5% pa (both continuously compounded). What is the one year (continuously compounded) forward rate starting in three years’ time? (2 marks) With the formula with continuously compounded‚ = =0.09 =9% The one year forward rate starting in three years’ time is 9% 1. The zero rate curve is flat at 6% pa with semi-annual compounding. What is the value of a FRA where the holder receives interest at the rate of 8% per annum with
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Effects of SO2 On Fermentation Rates Purpose SO2 is the primary inhibitor for natural microbiological growth in wine. It prevents the browning of juice by inhibiting phenol oxidase activity and kills the natural yeast cells for the utilization of fermentation-controlled commercial Saccharomyce strands (Boulton et al. 1996). SO2 is pH and temperature dependent and can exist as several forms. The bisulfate form (HSO3-) can complex with soluble solids such as anthocyanins and acetaldehydes to become
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taken up from the glucose solution by yeast cells in a fixed length of time can be measured. At the end of the fixed length of time‚ further uptake of glucose is prevented by transferring the yeast suspension to a boiling water bath to kill the yeast cells. If the suspension is then left to stand‚ the yeast cells form a sediment at the bottom of the tube. The concentration of glucose that remains in the fluid (supernatant) above the sediment can then be determined. As the original concentration of glucose
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and Effects on High Divorce Rates Since the past‚ people have gotten married and lived together. Some married couples are unable to maintain their relationship as a couple; therefore‚ they choose to get a divorce. Furthermore‚ half of American marriages now end in divorce. There are three main causes to this increase in divorces: the changes in women’s roles‚ stress in modern living‚ and lack of communication. The first significant cause in the rise in the divorce rate is that women have changed
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Name: Ashlei Sickles Exercise 5: Cardiovascular Dynamics: Activity 4: Studying the Effect of Blood Pressure on Blood Flow Rate Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Pressure changes in the cardiovascular system primarily result from You correctly answered: b. changes in the force of contraction of the heart. 2. What is the driving force for blood flow? You correctly answered: d. pressure gradient 3. Which of the following is directly
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