"Disribe why the medium a dye diffuses through can affect its rate of diffusion how does this relate to the nutrient transpost in cells" Essays and Research Papers

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    Diffusion

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    Cells make up every living things. One important part of a cell is the cell membrane. The cell Membrane is a thin protective coating around a cell that regulates what goes in and out of the cell. An important part of regulating this is passive transport. Passive transport is the movement of materials through membranes without any input of energy. One type of passive transport is diffusion. Passive transport is the diffusion of substances across a membrane. In diffusion‚ molecules will usually

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    Polonius. By the Act 4‚ she had lost most of her precious people: Polonius and Hamlet. It was also very unfortunate that although other characters in the play viewed Ophelia to be insane‚ she still had her mind right and said what she wanted to say through songs. It seemed to me that she expressed all of her feelings under a reason of mourning. She seemed to be kind of scary because I could imagine her in my mind‚ singing those songs with spiritless eyes. I also felt sorry for Ophelia as nobody seemed

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    oxygen released for the cold trial was 38 mL‚ 11 mL less than the control. Conclusion: The hot trial produced the most oxygen of all three trials. Heat tends to increase the rate of chemical reactions‚ explained in the article Temperature Effects (Introduction to Enzymes) by Chris Jamison. “Like most chemical reactions‚ the rate of an enzyme-catalyzed reaction increases as the temperature is raised. A ten degree rise in temperature will increase the activity of most enzymes by 50 to 100% . Variations

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    We can see through the results that there isn’t a normal proportional relationship between the wavelength of the light and the rate of photosynthesis and instead it starts relatively high then decreases and increases again. The colour red gives the highest rate of photosynthesis (89 bubbles per minute) with blue giving the second highest rate of photosynthesis (70 bubbles per minute)‚ and yellow giving the third highest rate of photosynthesis (64 bubbles per minute) and green with by far the least

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    Question: Do all liquids diffuse in the same way? Purpose: The purpose of this experiment was to find out if all liquids diffuse in the same way. Hypothesis: If different liquids diffuse‚ then the process will not be the same because liquids are made up of different molecules‚ with different densities‚ the diffusion will take longer/shorter than others. Materials: 1 plastic dropper with rubber top (medicine dropper) 3 glass beakers (400mL) 1 graduated cylinder (500mL) 4 drops of red

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    Background……………………………………………………………………2 1.2 Definition of interest rates……………………………………………………..2 2.0 How does an increase interest rate affect the economy in the UK? 3.1 Encourage people saving money and reduce borrowing……………2-3 3.2 Decrease firms to investment……………………………………………..3 3.3 Promoting the exchange rate‚ and makes exports less………………...3 3.4 Reduce the aggregate demand and inflation rate………………………4 3.5 The price and cost will fall………………………………………………

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    Rate of Reaction Experiment Introduction : in this term in chemistry class I was learning about rate of reaction. As defined by the Britannica encyclopedia‚ a chemical reaction is a process where one or more substances (reactants) are converted to one or more different products because of the rearrangement of atoms of the reactants. For the reaction to occur‚ the particles must collide with each other and in order to succeed there must be enough energy for the collision because a collision with little

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    Interpretation of Data When looking at my results i can safely say that the change in HCl concentration does affect the rate of reaction with the Calcium carbonate pebbles. The relationship between the change in HCl and reaction rate can be seen in the graph and raw data table presented above. If you compare the lowest concentration with the highest concentration you’d be able to see that there is a very large contrast between their averages. The average gas production of 0.1M HCl was 0.00693 kPa/s

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    Chemistry IA How does the molecular mass of alcohols affect its rate of evaporation? Introduction Alcohols are some of the most important molecules in organic chemistry. They can be converted into many different types of compounds. Alcohols contain the hydroxyl functional group (-OH)‚ bonded to a carbon atom of an alkyl or substituted alkyl group. The weight of the different compounds will differs because of the amount of hydrogen bonding. There are three kind of alcohols‚ primary‚ secondary

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    saliva (1ml). This proves that an increase in enzyme concentration (increase in saliva)‚ will cause an increase in the reaction rate (Bennett and Frieden‚ 1969).

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