Reverse osmosis

Movement of materials from areas of high concentration to areas of low concentration id diffusion. Osmosis is diffusion of water. Tonicity compares the environment inside of a membrane with the outside. When a membrane bound structure has a higher concentration of water on the outside of the membrane than the inside is hypotonic. Hypertonic is when a membrane bound structure has a higher concentration of water on the inside of the membrane than the outside. When something is isotonic the inside…

substance, such as salt, to the left beaker. Over time the left beaker will become fuller and the right beaker will lose water. This is because of osmosis; the salt is dissolved in the polar water and as water from the right beaker moves across the semipermeable membrane it is attracted to the salt ions, thus no water is moving to the right…

body, the natural process of moving soluble molecules across a membrane is referred to as passive transport. For this type of transport chemical energy is not necessary. Two of the main types of passive transport that the human body utilizes are osmosis and diffusion. Diffusion is the movement of a hydrophobic substance across a semi-permeable membrane without the use of cell energy from a gradient area of higher concentration to an area (either inside or outside of the cell) with a lower…

Potato or scientifically named as Solanum tuberosum is a raw ingredient that contains high in enzyme polyphenol oxidase (Faisal. S et.al, 2013) which influence in the oxidative activity when the potatoes are cut causing it to become brown in color (Vitti M.C et. al, 2011). Potatoes are not encouraged to be sun-dried as the slow process of removal of water will induce the growth of fungal on the food's surface (Faisal. S et.al, 2013). Blanching treatments or osmotic dehydration method where…

Conclusion: As seen above by the graphs and data, an increase in molarity of NaCl solution results in a more negative percent change in mass. Therefore, there is a negative linear correlation between an increase in molarity and the mass of the potato; additionally, there is a strong correlation, as shown by the coefficient of determination (r2) of 0.965 in figure 4. For further evidence, the potato cubes that were soaked in the high molarity solution (0.5M and 0.4M) were much smaller and harder…

If muscle membrane potentials vary as a function of ionic composition of the extracellular solution, changes in [K+]o should alter VM values. Moreover, EK, given by the Nernst equation, should accurately predict changing VM values. As extracellular potassium concentration is systematically increased, membrane voltage should be rendered more positive (less negative). Indeed, if [K+]i is 140 mM (according to Bernstein’s model), extracellular [K+] much smaller than 140 mM (e.g., 5.4 mM, 10 mM)…

“Why are cells so small?” The concept of this investigation is to examine which method of diffusion is the best explanation to why cells are small. The transpiration of cells nutrients apparat in different ways; one way is Osmosis. Osmosis is the diffusion of water. Active transport requires ATP to transport nutrients and then there is diffusion, which is the process of moving nutrients from an area of high concentration to an area of low concentration. The first explanation studied is that…

This is an example of a hypertonic solution as the potato loses its water due to the process of osmosis. The difference in concentration is one main factor that affected the rate of osmosis, resulting in more or less mass being gained/lost. The larger the gradient, the more mass is gained (or lost), explaining the larger magnitude in percent change of the masses of the potatoes collected.…

Examined T. californicus ability to handle high temperature stress under short-term, small exposure to high temperature, and long-term, persistant exposure to constant high temperatures. The took populations of T. californicus from 11 pools at different latitudinal gradients in a local scale. They put the specimen in petri dishes with founding adult females. They only mate one time and store the sperm so they can produce many groups of offspring. To test if inbreeding could influence the…

Different types of solutes do have an effect on the rate of osmosis in potatoes. For each of the following solutes used: salt, sugar, baking soda, cornstarch, cocoa powder, and tap water with no solute, the percent change of mass at the end were different. The solute with the highest percent change in mass was salt, followed by baking soda and sugar. This is due to the difference in the amount of solute in the solution and potato strip. The initial hypothesis was incorrect as the potato strip in…