The absorbance of this red pigment; betanin was tested in this lab in relation to the membrane permeability of the beet plant. For a cell membrane to be known as permeable, it means that it has the ability to let a fluid or liquid or even gas to pass through it. A cell membrane could be selectively permeable if it only allows certain molecules to pass through it by a process known as active transport. This process requires energy to move the molecules through the cell. This is why it is important to study how certain concentrations affect the permeability of the cell in question because it leads back to the process of osmosis.
Water purification by using nanomembranes can provide solution to their problem. DISCUSSION Desalination processes that are mostly being used for water purification includes Reverse Osmosis, and filtration through nanomembranes. Both these processes use pressure driven membrane technology which is employed at various configurations. Reverse Osmosis Pressure is used to drive the water through the membrane, leaving the salt behind. Desalination through reverse osmosis removes the salts from the water with the help of membrane.
The LCHF provides insights into past mantle geochemistry and presents a better understanding of the chemical compositions that existed during the evolutionary transitioning, from geochemical processes to biochemical processes (Baker & German, 2004). However, there is a reason to doubt the origin of life from hydrothermal vents. One of the main arguments against the origin of life from the deep sea, is the fact that so many macromolecules are found in biology. Molecules such as DNA, RNA, proteins and lipids are all polymers and form via condensation reactions – a wet environment is required for molecules to mix, but water then needs to be removed in order to form a polymer (Da Silva,
Reddy et al., (2011) developed the floating microspheres of Cyclobenzaprine HCl by emulsion solvent diffusion technique using Ethyl cellulose polymer to achieve an extended retention in upper GIT and there by improved bioavailability. Streubel et al., (2011) developed floating microparticles composed of polypropylene foam, Eudragit S, ethyl cellulose (EC), and polymethyl metha acrylate (PMMA) and were prepared by solvent evaporation
How long does it take for Botox to work? Or how long does it take for Botox to take effect? We will know the answers to those questions later on but before that, we should know first what is Botox and its origin. Botox is a neurotoxin that comes from Clostridium botulinum which can be found in the environment with free of toxins which includes forest and cultivated soils, and in the sediment of lakes, streams coastal and untreated waters. In natural
Part A: Osmosis practical task Aim: To observe the effects of osmosis in rhubarb cells. Hypothesis: Water will be extracted out of the cells in the salt solution causing the cells to look different to the cells in the freshwater solution. Materials: Rhubarb Distilled water in a dropping bottle Salt solution in a dropping bottle Microscope, slides, and coverslips Forceps and razor blades or scalpel Paper Towel Method: Clean and dry a slide and coverslip. Obtain a small sample of the red epidermal cells from the stalk of the rhubarb by carefully peeling away the layer with forceps. Prepare a wet mount slide of the rhubarb tissue in distilled water only.
The goal of this project is to determine the meaning of Osmosis. Osmosis is the movement of water across the membrane in response to the concentration gradients. Tonicity is the state of tissue tone or tension that is in the body fluid physiology that is effective osmotic pressure equivalent. The general principal of the experiment and how the weight is changed is related to osmosis because the weight gain or weight loss that is involved in the experiment is the movement that can contain
Exploration Title: Effect of Temperature on rate of Osmosis Submitted By: Abdulkarim Kamal Date Submitted: October 19th 2015 Subject: Biology HL Teacher: Mr. Nick Aim: This is an investigation to determine the relation between temperature of a solution (sucrose) and the rate of osmosis Scientific Context: Osmosis is defined a passive transport process in which a fluid diffuses across a semi-permeable membrane, from an area of high solute concentration to an area of low solute concentration and vice-versa. There are various factors that could potentially influence the rate of osmosis; these factors include volume, concentration, and temperature. If all external factors that may interfere with rate of osmosis are controlled, the results will show equal amounts of fluid on both sides of the barrier (membrane); this is known as an “isotonic” state. For this lab I will be using water and sucrose to demonstrate the rate of osmosis. In this lab I will be exploring how temperature impacts the rate of osmosis by placing pieces of potato of equal size in solutions of different temperatures and observing the change in mass of potato after a given period of time.
Lab Report Title: – Osmosis Visking tube lab Research Question: Does increasing the level of sucrose increase the procedure of osmosis? Introduction: This experiment is called the osmosis visking tube. This experiment is to investigate the relationship between solute concentration and the movement of water through semipermeable membrane by the process of osmosis. The purpose of this The Visking tubing apparatus establishes the osmosis procedure. The Visking tubing is a semipermeable membrane filled up with concentrated sucrose solution.
Moreover, this also includes controlling the content of salts within the body. It is important that this is controlled for the same reason but instead its processes are different. For example, it is controlled through the loss of ions. This can be done by the skin sweating and the body, once again in urine that is produced within the kidneys.
This test was to check for the presence of the catalyst catalase which liberates molecular oxygen. This catalyst is necessary for an aerobic organism to survive in aerobic conditions. After the experiment it was observed that my Gram positive organism did in fact bubble and utilize catalase. The third test conducted was on the MSA agar. This test was conducted for the purpose of selective and differential whether or not my organism can tolerate high salt concentrations.
It is necessary to understand what each test reveals about the unknown. Citrate tests are performed in order to distinguish between different enteric bacteria by seeing which can use citrate as the sole carbon source. MR/VP are tests that are used to distinguish between different types of fermentation either mixed acid or butanediol and test for the production of acetoin. H2S production is used to determine whether or not the bacteria can produce hydrogen sulfide. Mannitol high salt testing is done in order to determine if the bacteria is salt tolerant and can ferment mannitol.
Purpose and Techniques: This experiment has the aim to determine a chemical formula of hydrated compound, which ingrains cupper, chloride and water molecules in its structure. In order to find this hydrated compound, it is necessary to use the law of multiple proportions. In other word, finding the appropriate variables values to this compound (CxCly*zH2O). Additionally, two major steps are required to proceed the experiment. The first consists to heat a sample to liberate the water hydration, and then compare two mass weights before and after heating so gets easier to find the water percentage (mass).
Selective medium involves medium with environmental conditions that specifically grows some microbes while inhibiting others. Differential medium is used to identify and differentiate (as the title says) closely related microbes based on growth responses and physical indicators. It is imperative to use laboratory positive and negative controls in identifying the unknown because it confirms and compares the results of the unknown’s response to the definite guide. While performing the procedures in this report, students had to keep the bacterial and biological species concepts in context. The bacterial species concept is the identification and naming of microbes based on relating physical and physiological features of the unknown to the fitting taxa.