Diffusion of responsibility

Simple diffusion is a passive process involving the movement of smaller, nonpolar molecules moving across a membrane from a high concentration area to a low concentration area without any forces acting upon the substance. Facilitated diffusion is a passive diffusion process involving the transportation of large or polar molecules and ions across the cell membrane (which they cannot normally pass through) with the help of transport proteins. Because facilitated diffusion is a form of passive…

In experiment 1.1, we studied the relationship molecule size has with diffusion rate. Our hypothesis claimed that smaller molecules will travel farther across the agar plate given the same duration of time. Based on the data collected, our hypothesis was proven true. Potassium permanganate has a molar mass of 158 g/mol, methylene blue 319.85 g/mol, and potassium dichromate with 294.185 g/mol. Potassium permanganate diffused the farthest, potassium dichromate second, and methylene blue secured…

Demonstration of the Relationship between the Surface Area to Volume ratio on the rate of Diffusion Introduction: The surface area to volume ratio determines the rate of diffusion, the larger it is the faster nutrients will diffuse. Phenolphthalein acts as an acid-base indicator, turning pink in bases like NaOH and being colorless in acids like HCl. Using agar blocks as cells, a model was made to measure the rate of diffusion of different sized pink agar blocks changing to colorless ones.…

In this lab the dialysis was used for the diffusion and osmosis of iodine, glucose, starch and water. However, starch was unable to pass through the membrane due to it being too large. This is where it does not fully resemble a cell membrane because it can not transform and undergo things such as…

Results Table 1 showed that oral administration of Diclofenac sodium at 150mg/kg.b.w. resulted in a significant increase in renal tumor necroses factor -α (TNF-α), nitric oxide (NO) and thiobarbaturic acid reactive substances (TBARS) compared to the normal control group (p< 0.01). Rat receiving extract of any of the two doses of cranberry extract used in this study (75 and 150mg/kg.b.w.) showed a significant decrease in renal TNF-α, NO and TBARS compared to the group that received Diclofenac…

[RO-System] Reverse Osmosis, known as RO system, is a technology that is used to remove a large majority of contaminant from water by pushing the water under pressure through a semi-permeable membrane. To understand the purpose and the process of Reverse Osmosis, should understand the natural Osmosis operation. Natural Osmosis: The phenomenon of osmosis occurs when pure water flows from a dilute saline solution through a membrane into a higher concentrated saline solution. (Example of osmosis…

3.5. Effect of surfactant Span80/Span85 (3:1) on Ni (II) extraction Span80/Span85 are playing an important parameter and determine to appropriate surfactants can be obtained through the stability of emulsion liquid membrane for Ni(II) extraction. Span 80/Span85 as nonionic surfactants. Figure (9).The study of the efficiency of the highest extractants and reached to 98.7% after studying the surfactant concentration of span 80/span85 (3:1), the surfactant ratio an important in extraction of Ni…

Abstract In this study, a CO2-respensive GM-AD-HA hydrogel derived from electrostatics crosslinks and supramolecular bond will be produced and studied about its mechanical properties and physiological performance. It is expected to have application in restoring cartilage and controllable delivery of Epirubicin Background of research Hydrogels have crosslinked microstructure and can swell up in water without resolving. Their soft and rubbery nature minimizes inflammatory reactions of the…

1959702695 Osmosis is a type of facilitated diffusion where water molecules move from high concentrations of water to low concentrations of water through a selectively permeable membrane. Osmosis is a way for water molecules to create equilibrium between a cell and its environment. For example, if the cell is a hypotonic solution and its environment is a hypertonic solution, then water will naturally diffuse to its environment to create equilibrium. The guiding question for this experiment was,…

Diffusion is the movement of solutes and is a passive transport where particles move from higher concentration regions to lower. The cell membrane selectively restricts diffusion so ions move across the membrane by crossing the lipids or going through a channel. "Alcohol, fatty acids, and steroids can enter cells easily, because they can diffuse through the lipid portions of the membrane." (Anatomy and Physiology Textbook 86) The rate of diffusion is affected by surface area…