Molecular diffusion

Aim: In this investigation I will be measuring the effects of temperature on the membrane permeability of beetroot. I will be measuring the amount of anthocyanin that will diffuse out of the beetroot. The way in which I will measure the anthocyanin is to check the light absorbency of the solution using a colorimeter. The higher the reading on colorimeter the more anthocyanin present in the solution To find out the permeability of the beetroot membrane I will firstly cut out cylinders of beetroot

each side of the membrane are equal. The water moves because the membrane is impermeable to the solute and the solute concentrations may differ on either side of the membrane. Water molecules may move in and out of the cell, but there is no net diffusion of water. Water will move in one direction or the other, and this is determined by the solute or solvents concentration levels. If the two solutions are of equal concentrations, they will be isotonic. If the concentrations are unequal, the

Title: Effect of Polarity In Diffusion Of Molecules Across Cellular Membrane Abstract: Cell membranes play an important role in regulating what goes in and out of the cell. Diffusion, the process of movement of substances across the cell membrane from higher concentrations to areas of lower concentration, plays an active role in the transport and the regulation through cellular membrane. Sometimes, there are cases when cells are placed in hypotonic solutions and substances will diffuse through the

Objectives: a. to define diffusion and demonstrate this process in gases b. to cite molecular weight and time as two factors affecting the rate of diffusion c. to formulate a hypothesis on the relationship of each of these factors on the rate of diffusion d. to conduct and experiment to determine the effects of the two factors on the rate of diffusion e. to compute the partial rate and average rate of diffusion f. to conclude on the relationships of molecular weight and time on

Science and Mathematics Department of Biological Sciences In partial fulfillment of : BIOLOGY 101.1 (Scientific Paper on Diffusion) Submitted by : Diate, Kim P. (B.S.E Gen.Sci.1) Submitted to : Olive S. Anies, Ph.D ABSTRACT This scientific paper investigates my hypothesis that "Higher molecular weight produce faster diffusion". Diffusion is a process of equalization which involves movement of molecules from an area of high concentration to an area of low concentration

For Learning Centre use only Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Review Sheet Results 1. 2. Describe two Variables that affect the rate of diffusion. The two variables that affect the rate of diffusion are: A. The size of the molecule. The larger molecule will diffuse more slowly than the smaller molecule. B. The nature of plasma membrane. If the membrane is composed of lipid portion., only lipid soluble molecules can pass through while water molecules

In Figure 3.1 where the partial rates of diffusion of each substance was plotted at a three-minute intervaland also in Figure 3.2 where the comparisons are seen, Potassium Permanganate increased after three minutes ahead and remained its value until the sixth minute and it remained constant, Potassium Dichromate increased at the sixth minute and retained its increase until the ninth minute and then remained constant, while Methylene blue remained constant all throughout in the 30 minutes span of

Introduction Diffusion is one of two passive process membrane transports that moves molecules from a region of their higher concentration to a region of their lower concentration and has a driving force of kinetic energy. Simple diffusion, which is what this experiment is about, occurs without the assistance of membrane proteins along the concentration gradient not using any energy from the cell itself—this is where the kinetic energy come into play. Instead, the energy is coming from the molecules

Simple Diffusion Activity 1: Simulating Simple diffusion 1. What is the molecular weight of Na+? 22.99 2. What is the molecular weight of Cl-? 35.45 3. Which MWCO dialysis membranes allowed both of these ions through? 50, 100, and 200 4. Which materials diffused from the left beaker to the right beaker? NaCl, Urea, and Glucose at MWCO 200 5. Which did not? Why? Albumin, too large to diffuse Activity 2: Simulating Dialysis 1. What happens to the urea concentration in the left beaker

Annette Leon Title: Factors of Diffusion and Osmosis. Abstract: Although we may not think of it in everyday life, diffusion and osmosis occur everywhere. In the respiratory system, and it’s the way in which some cells communicate in our body. There are a few main factors that affect the rate of diffusion and osmosis. The three main factors that were tested in this lab were, molecular weight, concentration gradient, and temperature. It was discovered that heavier molecular weight in a molecule, the slower