Wednesday, December 25, 2019

Lab Report Osmosis Essay - 1683 Words

The effect of osmosis on artificial cells with different concentrations of sucrose Alex McRae Biology 120-902 Grand Valley State University 1 Campus Drive Allendale, MI 49401 mcraeal@mail.gvsu.edu Abstract In this study, we tested the validity of osmosis in artificial animal cells. Osmosis is the diffusion of free water across a membrane. The purpose of the study was to calculate the rate of osmosis in artificial cells containing different concentrations of sucrose and water. We studied the rate of osmosis in artificial cells by creating five different dialysis bags with different concentrations of both sucrose and water and calculating the cumulative change in weight ever 10†¦show more content†¦The bags were put in their corresponding beakers, all of which contained tap water, except beaker #5 (tap water bag #5 was placed in beaker #5 which instead of holding water, was filled with 40% sucrose) concurrently, recording the time. In the same manner in which the bags were placed in the beakers simultaneously, remove the bags every 10 minutes, and record the weight of each bag. This process should be repeated for at least 90 minutes total. This data was analyzed by calc ulating the cumulative change in weight for each dialysis bag. This was done from subtracting the weight of each bag from the initial weight of the bag. Doing so, allows the weight of each bag to be initially zero. For that, we must calculate the corrected cumulative change in weight. For each time interval of 10 minutes, we subtracted the change in weigh of bag #1 (tap water) from the weight of each bag at the specific time measure- this corrected any oscillations. Results The corrected cumulative change in weight due to osmosis from different concentrations of sucrose and tap water, are shown in Figure One. This figure shows the weight change in grams for every interval of 10 minutes. Using the corrected cumulative change in weight eliminates bag #1 because its average rate of change will always be zero. Below is a table of the bag weights at 10 minute intervals after being tested for an hour: | |Bag WeightsShow MoreRelatedLab Report On Osmosis Experiment Essay714 Words   |  3 PagesLab Report 4 Osmosis in Potatoes Introduction In this lab we are going to discovery how osmosis works using a semi-impermeable membrane a potato slice. Osmosis is known as the movement of water in and out of a cell. To understand how this works we must understand two terms. Hypotonic means the environment has less solutes compared to the inside of the cell. Hypertonic means that the environment has more solutes compared to the inside of the cell. With osmosis water will always move from hypotonicRead MoreLab Report On Osmosis966 Words   |  4 PagesIntroduction: The purpose of this experiment was to measure the rate of Osmosis. A concentration gradient is a gradual change in solute concentration between two areas, these areas are usually separated by a membrane. A gradient result from an unequal distribution across the cell membrane. When this happens, the solutes travel along the concentration gradient (Seeley, Stephens, Tate, 2005). This type of movement is called diffusion. Diffusion is the tendency of molecules to move from a higher concentratedRead MoreLab Report On Egg Osmosis1023 Words   |  5 Pages Egg Osmosis Lab Report Yen Do Period 2 Introduction: Cells in all living things have an outer layer known as the cell membrane. The structure of the cell membrane consists of the phospholipid bilayer organized by the arrangement of hydrophilic heads and hydrophobic tails. It is a selectively permeable membrane, where it divides the outer environment from the interior of the cell. It can control substances moving in and out of living cells. Certain molecules like gases, water, and foodRead MoreOsmosis Lab Report Essay672 Words   |  3 PagesNatasha Tenen Lab: Thursday (3-6 pm) OSMOSIS LAB REPORT INTRODUCTION Osmosis is a special type of diffusion where water molecules move down a concentration gradient across a cell membrane. The solute (dissolved substance) concentration affects the rate of osmosis causing it either to speed the process up or slow it down. Based on this, how does different concentrations of sucrose affect the rate of osmosis? If sucrose concentration increases in the selectivity-permeable baggies, then theRead MoreLab Report On Osmosis1356 Words   |  6 PagesAbstract This experiment was designed to test the acts of diffusion and osmosis. Several miniature experiments were conducted to test the different conditions that affect the rates of diffusion, how osmosis works, how a selectively permeable membrane works, and how plasmolysis affects plant cells. The dyes of potassium dichromate, Janus green, and aniline blue were used to show the process of diffusion at varying temperatures. The dyes differed in their molecular weight. This difference in weightRead MoreOsmosis In Potato Lab Report1667 Words   |  7 PagesI. Title: The Water Potential of Potato Cells. II. Purpose: The purpose of this experiment was to investigate the effect of the change in concentration of sucrose on the rate of osmosis in cylinders of potatoes. This would happen by using similar sizes and lengths of potato cylinders and applying the into different concentrations of sucrose (0,10%,30%, 50%, 70%) in foam cups then measuring the change in mass of the potato cylinders afterwards. Maintaining all variables unchanged such as pH, sameRead MoreBiology Osmosis Lab Report Essay1890 Words   |  8 PagesOsmosis Lab Report by Evan Gerber Claire Cambron First Lab Report Wednesday 10:30am February 20, 2013 Theresa Gburek Abstract The major objective of the experiment was to test the effect of the concentration gradient on the diffusion rate. It was hypothesized that the greater the stronger the concentration gradient, the faster the rate of diffusion would be. To test this, dialysis tubes were submerged in different concentration fructose solutions. We weighed the tubes at specificRead MoreLab Report : Diffusion And Osmosis Experiment1088 Words   |  5 PagesLab Report Diffusion Osmosis Experiment Sydney Mask INTRODUCTION All cells in the human body are surrounded by a plasma membrane made up of lipids and proteins which form a barrier. The proteins and lipids in the membrane occupy different roles. The lipids create a semipermeable barrier and the proteins are part of a cross membrane transport. To pass through the membrane a substance goes through a transport known as diffusion. Diffusion is movement of molecules from a high area of concentrationRead MorePotato Osmosis Lab Report968 Words   |  4 Pagesfocused on osmosis’s role in internal plant transport, the act of water molecules diffusing across a gradient, and studied diffusion, moving from a high concentration to a low concentration, through semipermeable membranes. Within this lab, a better understanding of osmosis and diffusion was obtained by using a potassium iodide and water solution and placing a dialysis tube that is sealed off inside the solution. This will help to determine what can pass through a semipermeable membrane, a selective barrierRead MoreOsmosis Lab Report Essay1615 Words   |  7 PagesOsmosis Rates in Artificial Cells Daniel George Department of Biology Grand Valley State University 1 Campus Drive Allendale, MI 49401 georged@mail.gvsu.edu Abstract The lab for this paper was conducted for the topic of osmosis, the movement of water from high to low concentration. Five artificial cells were created, each being filled with different concentrated solutions of sucrose. These artificial cells were placed in hypertonic, hypotonic, or isotonic solutions for a period of 90

Tuesday, December 17, 2019

Free Care Essays Therapeutic Practice Of The Therapist...

Therapeutic Practice in HBO’s â€Å"In Treatment† In the HBO series â€Å"In Treatment†, the therapist Paul’s treatment of his patient Sophie evolves over several episodes. Over the course of the four episodes in discussion in this paper, Sophie, an elite gymnast deals with the aftermath of a suicide attempt and her complicated relationship to her parents, her body and her sexuality. Paul’s approach to Sophie’s treatment is constructivist. He relies on a postmodernist framework to help Sophie evaluate and reframe the story that she has been telling herself about her parents. In episode 28, Sophie happily munches on a slice of pizza. Her enjoyment of the pizza comes to an end when Paul remarks that he is happy to see her eating with gusto. This quickly ends her enjoyment of the pizza and she becomes very closed off to him. Sophie goes on to tell a story of how the word reminds her of a girlfriend of her father’s, an Italian model who also admired the gusto with which Sophie ate. Sophie’s self-consciousness and obsession with her weight and her overall physical appearance are revealed in this moment and it becomes clear that Sophie’s difficulty lies in the way that she has constructed her sense of herself in relation to the cultural belief about beauty and perfection that she has received from her father and his model girlfriends. Later in the same episode, Paul pulls down one of Sophie’s father’s books of photographs. His approach is to use narrative therapy to help Sophie narrate her

Monday, December 9, 2019

Banking Royal Commission To Get Under Way -Myassignmenthelp.Com

Question: Discuss About The Banking Royal Commission To Get Under Way? Answer: Introducation With the announcement of the Royal Commission inquiry into the finance sector, the Malcolm Turnbull government gave a hot topic for debaters just before Christmas. The Prime Minister announced the decision after the four major banks of Australia- Westpac, ANZ, NAB and the Commonwealth Bank sent a letter of support for the inquiry. Kenneth Hayne, former judge of the honorable High Court is set to lead the inquiry team that would start proceedings starting February 12. The Labor party has welcomed the decision of the government and designated it as the victory of the people who are the most affected by the fraudulent activities of the banks. Bill Shorten, opposition leader described the announcement as a victory for Labor. He further aired his view that the commission would bring out the hidden secrets of the banks and give justice to the people. It needs mentioning that the opposition party has been demanding for the Royal Commission inquiry into the corporate affairs of the Commonwealth Bank for three years. The bank has been in news for its repeated breach of the code of conduct being involved in 55,000 cases of terrorism financing and many others, as reported by AUSTRAC. Many experts are of the view that the Royal inquiry, with its immense powers, would be able to dig in deep into the scandalous world that surround the CBA culture. In reality however, the Royal Commission has a daunting task to scrutinize every aspect of the financial sector including banks. Some have also questioned its effectiveness viewing the broad and lengthy terms of references. These terms of references further forbid the Royal Commission from reproducing other inquiries. Due to this fact, they are of the view that the misconducts of the Commonwealth Bank may not even be touched. Another concern regarding the Royal inquirys influence on CBA is its limited time. The commission has only a year to investigate everything and produce those before the public. However, the inquiry would have been effective had it given the license to carry on for several years. To say that the commission would actually have an influence on the Commonwealth Bank and its corporate governance would be wrong. The reason is its past records that exemplify the commissions marked failure to bring a change. The case of the 1991 Royal Commission into Aboriginal deaths i n custody proved largely futile as the number of Aboriginal deaths in custody continued to rise. It is also significant to note that the commission had run for more than three years and yet failed to put a check in the number of deaths or even prisoners. This contradicts the statement that given a longer period, the Royal Commission can produce crucial results. Another important aspect of the inquiry is the amount of money that would go into it. It is estimated that around 75 million of Australian dollars, the money that belong to the countrys taxpayers, would go into the investigation. In addition to this sum, the four banks are also predicted to drain a wealthy amount to put forward their side of the story, CBA included. It is therefore going to put huge financial pressure on the government. References Commonwealth Bank admits to failures in money-laundering case. (2018, January).The Guardian. Retrieved from https://www.theguardian.com/australia-news/ Letts, S. (2017, December 15).CBA warned terrorist his account was about to be closed: AUSTRAC.ABC News. Retrieved from https://www.abc.net.au/news Corporate Governance Council. (2018, January).Asx.com.au. Retrieved 30 January 2018, from https://www.asx.com.au/regulation/corporate-governance-council.htm Osborne, P. (2018, January 22).Banking royal commission to get under way.NewsComAu. Retrieved from https://www.news.com.au/

Sunday, December 1, 2019

Natural Science Pollution Essay Example

Natural Science Pollution Paper The World Heath Organization estimates that 25 percent of all deaths in the developing world are directly attributable to environmental factor . 1 Some researchers estimate that exposure to pollution causes 40 percent of deaths annually-2 Pollution is Regarded as a Major (and quickly emerging) Factor in Disease People affected by pollution problems are much more susceptible to contracting other diseases. Others have impaired urological development, damaged immune systems, and long-term health problems. Women and Children are Especially at Risk, Children are Most Susceptible Children are physiologically different and more vulnerable than adults. In some cases they have higher exposures since they eat, drink and breathe more per kilogram of body weight than adults and tend to ingest a lot more dirt and house dust than adults from their crawling around and playing outside. While children only make up 10 percent of the worlds population, over 40 percent of the global burden of disease falls on them. Indeed, more than three million children under age five die annually from environmental factors. Death is Not the Only Toll of Exposure to Pollutants Pollution causes chronic illness, neurological damage and shortened lifespan. For instance, the presence of lead in children lowers I. Q. By an estimated 4-7 points for each increase of 10 pig/del. 3 Our database identifies populations around the globe with blood lead levels ranging from 50 -100 pig/del, up to 10 times the WHO reference levels for protection against neurological damage. Pollution is Worst in the Developing World We will write a custom essay sample on Natural Science Pollution specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Natural Science Pollution specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Natural Science Pollution specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The worlds worst polluted places are in the developing world. Similar conditions no longer exist in the U. S. , Canada, Europe, Japan and Australia today. In wealthier countries, there are sufficient legal, political, cultural and economic disincentives for polluters to allow their activities to affect human health on a massive scale. Unfortunately, many of these tactics do not work in developing countries that are trying to increase their industrialization and make themselves economically com appetite for manufacturing and processing. Pollution Contributes to Global Warming Toxic emission from industry and other sources may contain greenhouse gases. Therefore some sources of pollution contribute to global warming. Unlike global warming, where the negative effects are evolutionary and solutions elusive, the effects of pollution are immediate and deadly, and the solutions are well-known and available. Pollution: A Global Killer, a Solvable Problem The understanding and the technology for remediation of all types of pollution sites is well established in the industrialized world, where life- heartening toxic pollution has almost been eliminated. All that is needed to eliminate pollution worldwide is resources and commitment. Everyday Pollution Solutions Your Guide to Going Green 1 | Use cast iron pans instead of nonstick. Read about Teflon health concerns. | 2 | To avoid chemicals leaching into food, go easy on processed, canned or fast foods and never microwave plastic. Read about Biosphere A, a toxic food-can lining ingredient associated with birth defects. | 3 | Buy organic, or eat vegetables and fruit from the Clean 15 list. Find out more about the Dirty Dozen. | 4 | Pregnant women should use dizzied salt to combat chemical interference from the thyroid. Read about rocket fuels effect on the thyroid. | 5 | Seal outdoor wooden structures. Order a test kit to find out if your wooden deck, picnic table, or palates is leaching arsenic. I 6 | Leave your shoes at the door. This cuts down on dust-bound pollutants in the home. | 7 | Avoid perfume, cologne and products with added fragrance. Search for personal care products that are fragrance-free, or check the rodents youre already using. 8 | Buy products with natural fibers, like cotton and wool, that are naturally fire resistant. Use our list of products and manufacturers to avoid the chemical flame retardant BED. 1 9 Eat low- mercury fish like tailpipe Pollock, rather than high-mercury choices like tuna swordfish. Check our Safe Fish List to see which fish to avoid and whats safe to eat. 10 | Filter your water for drinking and cooking. How does your tap water stack up? Search our tap water database to see what youre drinking. | 11 Learn your personal body burden. Take a step-by- step tour of your home to learn the toxic truth about how household products contribute to your body burden of industrial chemicals. I Top of Form What does pollution cause to people and the environment? Pollution causes server environmental hazards such as acid rain, which is a result of air pollution, global warming which is caused by carbon emissions and also non bio-degradable wastes like plastics which choke the land and cause toxins to infiltrate into the soil, which later destroys crops.