Diffusion and Osmosis lab Results: Figure 1a-rate of weight change in 15 min intervals of each concentration. The first tube showed very little weight change. However all other tubes show a greater change the concentration could be the factor that determines the permeability of the sucrose. The sucrose molecules are too large to pass through. Figure 1b- sucrose concentration determines the weight change. In this case based on our results as concentration increases the percent weight change
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Activity 1: Simple diffusion Introduction: Simple diffusion is the net movement of substances from a region of high concentration to a region of low concentration so its overall net movement is along the concentration gradient‚ simple diffusion does not require energy therefore it is ’passive’‚ substances are diffused across the membrane between the phospholipids. Materials and methods: * 20 mwco dialysis membrane * 50 mwco dialysis membrane * 100 mwco dialysis membrane * 200 mwco
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Biology Lab #1: Chemical Diffusion Purpose To discover how the size of a cell affects the diffusion of chemicals throughout the cell. Hypothesis I predict that as the cell size increases the diffusion depth and the diffusion rate will decrease. Equipment • Eye protection • 250 mL beaker • Timing device • Scoopula • Ruler • Scalpel • Sodium hydroxide solution • 3 different sized cubes of phenolphthalein agar • Paper towels Purpose
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The four accounts of the first Crusade are definitely colored by the perspective of the writer. In each of the stories there was very little respect given to others. We see it in comments from Pope Urban II “exterminate this vile race from our lands”. Solomon Bar Simson wrote of an “arrogant people‚ a people of strange speech‚ a nation bitter and impetuous.” Ibn Al-Athir wrote of Roger the Frank “At this Roger raised one leg and farted loudly‚ and swore that it was of more use than their advice
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Throughout his papacy‚ Sixtus had renewed the crusade against the Turks‚ been involved in the Pazzi conspiracy‚ and repaired and established _________ of Roman architecture. Sixtus had been in office from 1471 until his death on August 12th‚ 1484. Although it has been said that Sixtus had died from distress‚ his death remains unknown. Today‚ Sixtus’ tomb can be found in the basement Treasury of St. Peter’s Basilica in Rome. Of his tomb‚ commissioned by Cardinal Giuliano della Rovere (later Pope
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Lipids and Phospholipids The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate‚ a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy. The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The
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conflicts‚ one of the most memorable of these conflicts was The Crusades. The Crusades were a time in Europe’s history where there was great religious conflict between Muslims and Christians that started in 1096‚ and ended with the ninth Crusade in 1272. They started as a religious territorial war over Jerusalem‚ but changed to be more territorial over time. This caused the first four Crusades to have the most impact‚ excluding the Children’s Crusade‚ which was the beginning of the end of the Christian empire
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The effect of size on the effectiveness of diffusion Aim: To use agar blocks infused with 0.1 Molar sodium hydroxide (NaOH) and phenolphthalein to investigate the relationship between shape and surface area: volume ratio on the effectiveness of diffusion. Hypothesis: That for a cube of agar‚ the time taken for complete colourisation due to diffusion of HCl is directly proportional to the cubes volume. Materials: |A block of agar (10cm x 5cm x 3cm) with 0.1M NaOH and |1x 250mL
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Introduction: Diffusion and osmosis are passive processes of transport. Passive transport involves no disbursement of energy by the cell. Diffusion movement is from high concentration to low concentration‚ which the driving force for this type of movement is kinetic energy particles themselves. Which crystal (Methylene blue‚ solid or Potassium Permanganate KMnO4-purple) will move further than the other due to the driving force (kinetic energy)? My prediction is that Potassium Permanganate KMnO4-
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Diffusion is the molecular net movement from a higher concentration to a lower concentration. For instance‚ when a person is smoking‚ the smoke diffuses into the air. The molecules in the smoke‚ released from the cigarette‚ travel through the air. Here is how it occurs. When molecules are close enough‚ they collide with each other‚ their kinetic energy changes. Due to the direct relationship between diffusion and molecular kinetic energy‚ the molecules move away from the point of the collision as
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