Lab # 2 Diffusion & Osmosis Introduction Kinetic energy‚ a root of energy stored in cells‚ causes molecules to hit into each other and move in new directions. Diffusion is the result of this contact. Diffusion is the random movement of molecules to an area of lower concentration from an area of higher concentration. Osmosis is a type of diffusion. This is the diffusion of water through a selectively permeable membrane from a region of higher water potential to a region of lower water
Premium Osmosis Chemistry Diffusion
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
Premium Protein Cell membrane Osmosis
The purpose of this lab was to observe the rate of osmosis and diffusion‚ as well as the effect of molecular size of the particles on this rate. Part I of the lab was a demonstration of osmosis and diffusion‚ that dealt with raisins in different liquid environments‚ each with a different concentration of sugar. Part IV of the lab was using the same idea as the demonstration‚ by putting objects in different concentrations of a substance; in this case elodea leaves in salt water. In both cases‚ the
Premium Chemistry Water Concentration
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
Premium Volume Sodium hydroxide Orders of magnitude
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-
Premium Diffusion Molecular diffusion Osmosis
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
Premium Osmosis Concentration Chemistry
The bumpy road to low carbon development: Insights from changes in the innovation system of China’s photovoltaic industry 1 Introduction Environmental scientists‚ energy experts and relevant enterprises assure us that the technological solutions needed for low carbon development are already available. This is good news as it implies that – at least technically – it is possible to prevent global warming beyond the 2°C threshold. But what does ‗availability‘ of low carbon technologies actually
Free Photovoltaics Solar cell Renewable energy
INTRODUCTION 1 1.EXECUTIVE SUMMARY 2 2.ELEMENTS OF INNOVATION 2 2.1 THE TYPES OF INNOVATION 3 2.2 CLASSIFICATION OF INNOVATION 4 2.3 DRIVERS OF INNOVATION 4 2.4 ENABLERS OF INNOVATION 5 2.5 BARRIERS TO INNOVATION 6 3. INNOVATION WITHIN BANKING ORGANISATIONS 7 3.1 TUNNEL VISION AS A BARRIER 9 3.2 CUSTOMERS AS ENABLER WITH LEGISLATION AS A DRIVER 9 4. INNOVATION AS A TOOL 10 4. RECOMMENDATIONS 10 4.1 THE MAVERICKS 11 4.2 READ THE SIGNS 11 4.3 COMMUNICATE 12 4.4 IDEAS INCLUDE 12 5
Premium Innovation Financial services Bank
Where as the active transport requires energy from the molecule to be moved. oFacilitated diffusion can only move in one direction from high concentration to low concentration‚ which is with the gradient. Where the active transport can move from both low concentrations to high concentrations‚ therefore it can move against the gradient where as the facilitated diffusion can not. The process of active transportation is when a molecule work together with the active side of a protein
Premium Cell Organelle Eukaryote
Dick Smith grabs a stake in cattle company Australian entrepreneur Dick Smith. Dick Smith is criticial of foreign companies buying up Australian land. Kim Honan 346 words 1 August 2012 Australian Broadcasting Corporation (ABC) News ABCNEW English (c) 2012 Australian Broadcasting Corporation After a $1 million investment‚ entrepreneur Dick Smith is now a major shareholder of the country’s largest beef producer‚ the Australian Agricultural Company (AAco). AAco is also Australia’s second
Premium