Osmosis Potato Lab Report Biology Essay Example

Osmosis Potato Lab Report Biology Paper If the two solutions are of equal concentrations, they will be isotonic. If the concentrations are unequal, the solution with the higher concentration is hypersonic, and the solution with the lower concentration is hypotonic. What is the solute concentration of potatoes? We can determine this by conducting an experiment in which involves the process of osmosis. Potatoes are full of sucrose used for energy storage in plants. Sucrose is a carbohydrate found in food. It is a disaccharide, with a combination of fructose and glucose. Consumers break sucrose down into two inconsistencies so they can be absorbed more easily onto the blood. Sucrose is too large of a molecule to diffuse through a semi- permeable membrane, and therefore needing to be broken down so they can move in and out of cells effectively. If potatoes are placed in a solute containing sucrose, then a concentration gradient would be present and the process of osmosis would naturally occur by moving water through the semi-permeable membranes. If the concentration of sucrose in the solution is less than the concentration of sucrose found in the potato, then the potato would decrease in mass. We will write a custom essay sample on Osmosis Potato Lab Report Biology specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Osmosis Potato Lab Report Biology specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Osmosis Potato Lab Report Biology specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The opposite would occur as well, if the concentration of sucrose in the elution is more than that of the potato, then the potato would expand and gain in mass. In conducting this as an experiment, we can determine what the solute concentration of potatoes is. Materials The materials used to conduct this experiment are as follows: * Potato * Test-tube Rack * one loom Beaker * One ml Beaker * Distilled Water * Paper Towels * Marker for Test Tubes * 1 mol/L Sucrose Solution * 2 Pipettes * 10 ml Graduated Cylinder * Electronic Balance * Test Tubes * Razor Blade/Scalpel Figure 1. : Cutting of potatoes, weighing of potatoes, and potatoes placed in sucrose solution. In figure 1. 0, we can see that the potatoes were cut with a scalpel into thin slices so they could fit the test tubes appropriately. Then their mass was recorded using the electronic scale. They were placed into the test tubes containing sucrose and were to be left on the test tube rack over a 24 hour radius. The next day, the potato slices were to be taken out and measured again. Safety Considerations It is important for one to be careful using sharp instruments. When there were higher concentrations of sucrose solution, the potato decreased in weight. This is due to the fact that the potato was hypersonic in comparison to the potato. Through osmosis, sucrose from the potato moved along the concentration gradient out and into the test tube making the potato hypotonic. When the potato was distributed into 0. 2 mol/L of sucrose solution, there was no change in weight. This was due to the fact that both were isotonic, and with this, we can infer that the potato contains 0. 2 mol/L of sucrose solution. Discussion and Analysis The percentage of change in mass if the sucrose solution had the same solute concentration as the potato section would be 0%. This is due to the fact that the change in mass occurs in osmosis. Osmosis occurs when an area of higher concentration is trying to get to an area of lower concentration in a semi- ramble solution. If the concentrations are the same, being isotonic, there would be no osmosis occurring, and therefore no change in mass. This occurred when there was a 0. 2 mol/L concentration of the sucrose solution, therefore we can justify that the potato had that same concentration. Figure 1. 4: Graph Results After OH in Solute Concentration With Labeled Hypotonic, Hypersonic, Isotonic The above graph is similar to that of Figure 1. 3, but this has labeled which solutions were hypersonic to the potato cytoplasm, which were hypotonic, and which was isotonic. As the concentration of the sugar increases, the more mass the potatoes would lose. This would make the potato hypersonic. This is because when potatoes are in sugar solution that is of a higher concentration of sugar than the cell sap, (cytoplasm in a plant cell), the water moves out of the cell causing the reduction in mass. Opposite of this, when the potatoes are in a lower sugar concentration than their cell sap, the concentration of water is higher outside the cell so the water moves in the cell causing the potatoes to gain mass through the process of osmosis. This would make the potato hypotonic. When the sucrose solution was at 0. 2 mol/L however, the mass stayed the same because the concentrations were the same. This means that the potato and the sucrose solution were isotonic. Practical Application Fluids that are the same solute concentration as human blood are isotonic. We want this so that cells in our body wont else, or break. If the inside of the cell has less solutes and more solvent, the solvent inside, (water), would diffuse out of the cell by going down the concentration gradient, which would make this hypersonic, causing the blood cells to shrivel and become insufficient. On the other hand, if the inside of the cell has more solutes and less solvent, the solvent outside would diffuse into the cell with the same process potentially causing the blood cell to burst due to it being hypotonic. As mentioned earlier, we know that mass will not change if concentrations of a solute and a solvent are the same, or that are isotonic. If we were to prepare a solute with the same concentration as the potato, 0. 2 mol/L, and to leave it in the solution for 24 hours, we could expect that there would be no change in mass. This being due to the fact that they have he concentrations, and not needing to move along the concentration gradient because they are already of equal concentrations. Grass contains water and the salt does not. When the grass comes into contact with salt, the water escapes and travels into the salt. This is because plant cells have a high concentration of water whereas the salt has low concentrations. Due to osmosis, the water solution in the grass of which is of higher concentration moves to the area of lower concentration in the salt to try to make their concentrations equal. This process in turn causes the grass to dry out and die. Sources of Error Equipment errors include: 100 ml beaker: +/- 0. 05 ml 50 ml beaker: +/- 0. 2 ml 10 ml graduated cylinder: +1-0. 05% 10 ml pipette: 0. 02 ml analytical balance: +/- 0. Eggs Human error could include a variety of things. One could simply read a measurement wrong when filling the test tubes with solution. One could calculate incorrectly by typing in the wrong number. If one fails to put the potatoes into each test tube at the same time, the results could be off ever so slightly. Environmental factors could change results as well, if temperature i s higher than room temperature, osmosis could occur faster than usual. Conclusion In conclusion it was proven that on average, the potatoes that were in the test tube containing little to no sucrose solution gained in mass, and those that were in test tubes containing more or only sucrose had a decrease in mass. Results could have been more accurate if all of the potatoes were placed in each test tube and taken out of each at the exact same time. This would mean that the potatoes would have the same time contacting with the sugar solution. Another way results could have been more accurate would be if each potato was cut into the same shape and size. If the potatoes all had the same mass, then results would be more specific and accurate. It also depends on how the thickness differentiates from potato to potato. If there was one potato thicker than the other, then it may make a difference in how long it takes for the osmosis to occur. If we were to do the experiment again and take the average of both sets of results then it may be more accurate as well. When a plant cell is placed in a solution containing a higher concentration of solute, the water in the cell would move towards the solution. The plant cell would shrink and the flower would wilt.

Princess Dianas Death & the M essays

Princess Diana's Death & the M essays Princess Diana vs. the Paparazzi: How Far Is Too Far? It was not the death of Princess Diana that world craved to know about, but the circumstances that surrounded the way in which she died. I remember the day Princess Diana died as if it were yesterday. I came home from a party a little worried about getting in trouble because I came in late. Instead of coming in to my Mom yelling at me about being late, I come into my mom crying and watching the news on television. She tells me that Princess Diana had died and they believe that it was the fault of the paparazzi following her limo with Princess Diana and her new boyfriend. With in the next few days the paparazzi became the main blame for the death of one of the most amazing people of the time. After this there was no way to rid of the story of Princess Dianas death. Every which way a person turned; the story was all over the newspapers, television and radio. It was an obsession to so much of the public but the media then took it to a new level. Richard Lambert says, What was startling and even sinister was the way that the media fed off that response and helped to create a mood which seemed almost cult-like in its intensity. Ellen Hume says, This isnt about stalkarazzis going to far for the picture of the moment it is about journalists going the wrong way entirely. They are confusing journalism with sport. At the time before her death the paparazzi were taking everything too far. Every paper wanted to be better than the next and to get that they had to do the unthinkable. It was pushed to far and ended fatally. Journalism did change for a period of time where it was not pushed to extremes due to such a tragic event. The media could try to act like there would never be such a fuss over a story and it would not go to such extremes. But this could not and did not last. The paparazzi have gone back to...

Cultural Economy of the Media Essay Example | Topics and Well Written Essays - 2000 words - 1

Cultural Economy of the Media - Essay Example A study of 540 students at the Carnegie Mellon University reveals that 89% of students at this institution gave their real names, and 61% of students managed to upload their real photos in the social networking site of Facebook (May, 2013). These users did not alter their privacy settings, and therefore it was possible to access their information publicly. On this note, therefore, Facebook has come under criticisms for failure of providing adequate privacy options for its various users. These criticisms arise on the background that the information that users provide can cause serious security problems to the individual concerned and to the country as a whole. The social network sites also process enormous information on a daily basis. Features in these social network sites, such as open platform applications, invitations, messages, and photos are avenues in which the private information of a user is made public. To protect users from inappropriate use of their information/data, it is important to enact measures that will regulate the nature of information that the public can view (Austin, 2003). The criterion of choosing this kind of information should be on the background of the effect the data can cause to the individual if it is exposed to the public. This paper analyzes the roles of privacy in the social networking sites. In analyzing these roles, this paper uses Helen Nissenbaum’s theory of privacy, known as the contextual integrity theory. It also identifies the specific European Union and UK privacy laws that seek to regulate the privacy of an individual, and it demonstrates the business interests of these social networks in relation to the information they control. This paper has a conclusion, which is a summary of the main points addressed in it. Privacy in a social networking site protects the information of an individual from being used by people who are not authorised to use the information (Ritzer and Jurgenson, 2010). The current trends in regard to gathering data and disseminating the same by data collecting companies involve the perusals of information from social networking sites. The intention of these companies is to sell the information to marketing companies. On most occasions, they collect and use this information without the knowledge of its owners. According to the contextual integrity theory, this amounts to a breach of an individual’s privacy. According to this theory, it is impossible for an individual to have complete privacy. On this basis, therefore, people will share their personal information, as long as there are certain principles that govern the nature in which they share their personal information (Pollach, 2005). However, if these principles are contravened, without the permission of the parties involved, then a breach of privacy has occurred. Take, for example, these data collecting companies, accessing the information of an individual through their social networking account, and using t he information they gain to produce a marketing campaign without their knowledge. According to the contextual integrity theory, this is a breach of an individual’s privacy. This theory further goes on to identify two types of behaviors that determine whether there is a breach of an individual’s privacy or not (Mowlabocus, 2004). These norms are the norms of distribution and that of appropriateness.

Two Cultural Practices Among The Yanomamo Essay

Two Cultural Practices Among The Yanomamo - Essay Example He describes them as a society constantly â€Å"living in a state of chronic warfare† (p. 22). The purpose of this paper is therefore to show that contrary to popular portrayal of the Yanomamo as a community dominated by senseless violence, instances of warfare are only sporadic and waged for specific purposes (Harris, 1979). In expounding on this view, the paper will look at two main cultural practices among the Yanomamo society that shapes their beliefs and practices as a people. Festivals as a cultural practice Festivals play an important role among the Yanomamo people, and are part and parcel of their culture. They are important to the Yanomamo people because they serve both social and political functions. They are held to cultivate and reaffirm friendships among the villages. Feasting among the Yanomamo involves the sharing of meals, which in a larger extent, symbolizes the sharing of goods through trade and other economic practices that are prevalent among the Yanomamo. These festivities are therefore used to form a social bond among the tribes, despite their warring nature, and to honor and appease the spirits of their ancestors. The Yanomamo people practice a lot of festivities and rituals which include hunting rituals, marriage festivals, songs and dance festivals, and the hugely shocking endocannibalist ritual, which involves the consumption of a deceased’s ashes. ... The hunting festival plays an important role among the Yanomamo culture. They practice two main hunting festivals, the â€Å"rami† which provides them with meat, and the â€Å"heniyomou† which is practiced by the whole community collectively for special guests (Micheli, 2011). The festival is carried out in the evenings and is characterized by songs and dances. Here the young men are required to compose songs amidst laughter from the older members of the society. Whereas the Yanomamo consider marriage to be an important event in their culture, they have no actual marriage ceremonies. The Yanomamo marriage is basically a handing over affair as the suitors were already predetermined by the parents of the girl when she was at a tender age (Micheli, 2011). Such marriages are usually organized as a means of creating alliances with the men and other tribes. Perhaps the most elaborate and well organized festivity/ritual among the Yanomamo is their funeral ceremonies. To the Ya nomamo, death is a great source of grief and anger, no matter the age, gender or position of the deceased, to the whole society. This is because they believe the cause of such death results from sorcery or witchcraft from the rival tribes (Fergusson, 2001). They thus mourn their dead with passion, and mark a ritual where they cremate their dead and ingest the remains of the deceased. This form of endocannibalism is a unique feature among the Yanomamo, who believe by ingesting the remains of the dead member of the society they are preserving his spirit within the society. The major significance of these festivities among the Yanomamo was that they acted as social activities where the community

Linguistics Essays William Labov

Linguistics Essays William Labov William Labov’s narrative analysis differs from some of the earlier approaches in that his method focuses on oral narrative instead of written text. William Labov’s narrative analysis differs from some of the earlier approaches in that his method focuses on oral narrative instead of written text. Earlier linguists, such as Ferdinand de Saussure, believed in a structural approach. This meant that language had to be approached as a fixed, clearly defined set of symbols, which furthermore had to be studied in isolation. However, later linguists, among them Uriel Weinrich, Labov’s mentor, believed that the structural approach failed to assist us in understanding â€Å"the transition of a language from state to state† (Labov 1972:xv). Labov’s focus has been to study language as it is spoken, as a fluid and constantly changing dynamic. Most of Labov’s model of narrative analysis is based on his belief that â€Å"one cannot understand the development of a language change apart from the social life of the community in which it occurs† (1972:3). He feels strongly that observing and recording sound changes is not enough to understand the process of change—that one has to view that change within the context of the community in which it is being made, as it is being made. Using this theory, he carefully chose communities where he felt he could do this most effectively. He conducted the first of several in-depth studies in Martha’s Vineyard, a small, closed island community located in Dukes County, Massachusetts. Labov saw Martha’s Vineyard as an ideal study site primarily because it was very self-contained. In addition, it was physically isolated, located three miles from the mainland. For his next series of studies, Labov selected parts of New York City. One particular area he focused on in the New York City study focused on Black English as it was used in certain parts of the city, specifically Harlem. Although Harlem did not have geographical distance from New York the way Martha’s Vineyard did from Massachusetts, racial and socioeconomic boundaries made it an isolated community in its own way. The main points of Labov’s model were first published in 1972 in an essay entitled â€Å"The Transformation of Experience in Narrative Syntax.† In this essay Labov introduces and explains what he sees as the six main parts of a narrative. He discusses each part as a tool which we can use to analyze narrative patterns, to help recognize recurring themes and ideas. The six main parts of Labov’s model are: abstract; orientation; complicating action; evaluation; resolution; and coda. It is not necessary that all six of these be present in every narrative; for example, some narratives will not have an abstract, while others may not have a coda. Additionally, these components need not appear in a specific order, and each may be present in a variety of ways—these factors are also considered in the final analysis. Labov uses the term â€Å"abstract† to refer to the introductory part of the narrative. This may be, literally, an â€Å"abstract,† or a brief summary of the events; or it may be simply a line or two that will spark the reader’s interest. The role of the abstract is to attract the listener’s interest, and to get the listener to want to hear the rest of the story. The next stage is called â€Å"orientation.† During this phase the speaker gives the listener information about the setting of the story. For example, the speaker will introduce and describe the people or characters who will interact in the story, as well the setting (the place the action occurs) and the time frame. For the story to be valid and understandable to the reader, it is essential that he or she be informed of the time and place in which the narrative unfolds. Following orientation is the â€Å"complicating action.† This refers to the actual events of the narrative, the occurrences that move it ahead. Complicating actions may be physical actions. They may be also be statements spoken aloud, or they may be thought acts â€Å"Evaluation† refers to the point, or reason, the narrative is being told, and it can be done in a number of ways. â€Å"Evaluations† may be specifically and clearly stated, or they may be implied. â€Å"Internal† evaluations are those revealed while the story is taking place, while â€Å"external† evaluations take place outside the immediate action of the story (for example, after the story is told). Another evaluation technique is the â€Å"embedded evaluation.† This can be an explanation offered by one of the people in the story, or by the storyteller directly. In addition, it may also be an event in the story. Following this is what Labov calls the â€Å"result† or â€Å"resolution†: this, basically, is the conclusion. At this point the narrator indicates that the story has come to a close, that a final action has occurred. Finally, there may be a â€Å"coda.† By â€Å"coda† Labov means that the narrator points out the relevance of the story by connecting it with every-day life, or with other events or actions that fall outside the story frame. The coda does not always have to be present. It may also be present without being explicitly stated. One of the issues to be discussed concerning Labov’s model for narrative analysis is the method of data collection, since â€Å"the means used to gather the data interfere with the data to be gathered† (Labov 1972:43). The interview itself may be considered â€Å"public speech.† However, even within this realm, there are other conditions to be considered. For example, does the relationship of the interviewer to the interviewee affect the latter’s speech patterns? Does the use of a recording device affect the interviewee’s choice of words, perhaps make word selection more formal than it ordinarily would be? One way of monitoring this is to compare the subject’s speech patterns during the course of the interview with his or her speech patterns outside the interview setting. For example, the interviewer could also observe the subject while he or she is relaxed with peers or family members in a less formal setting. Labov’s model has strongly influenced language studies since its introduction in 1972, and it continues to be influential in additional settings. With the widespread growth of the internet, we now have a new, informal sort of communication.   Linguist Michael Toolan suggests that Labov’s model is a useful tool in the analysis of internet writing. Internet writing is often less formal than academic or other types of writing, but more structured than spoken language. Thus, Labov’s model remains effective today. As language itself continues to grow and change, it is quite probable that Labov’s model will grow to accommodate that change, and to continue to be a useful tool in years to come. REFERENCES Labov, William (1972) Socioloinguistic Patterns. Philadelphia: University of Pennsylvania Press. Toolan, Michael (1988) Narrative: A Critical Linguistic Introduction London: Routledge.

Contemporary society Essay

Identify the principal agents who expose white collar crime in contemporary society. What factors motivate people to expose such crime, and what factors inhibit them from doing so? What specific policy measures can be adopted to encourage exposure of white collar crime? The principle agents who expose white collar crimes in contemporary society are informers, whistleblowers and investigative reporters. Informers would consist of the people like politicians who usually give information to receive a lesser sentence or the like for their own involvement. This is very popular here in IL where the politicians are tried and convicted and then become witnesses testifying against one of their fellow conspirators. These informants are motivated by their sense of self-preservation. However, they can be reluctant to tell as there may be a fear of retaliation to them or to their families. Also, there are whistleblowers who, in my opinion, are usually driven by moral and ethical values. These brave people are the ones who brought companies, like Enron, to the forefront. They are your everyday employees who see something wrong, and bring it to the attention of those who can enforce the laws that are in place. Moreover, they could be reluctant to tell anything due to fear of being blacklisted, loss of employment, or being ostracized among other negative reactions. Sometimes the negative social and financial repercussions outweigh the benefits of doing what is morally right. Last, there are investigative reporters. These professional bring issue to the forefront, when it appears that they are being overlooked by society. A good example of this is a news story that showed, at different construction sites, workers asleep on the job, wasting tax payer money. Another story involved politicians being investigated for giving contracts to friends and family. Investigative reporting is motivated by professionals who want to bring to the forefront the crimes of companies and government, but I believe that it is also driven by ratings. Some things can be shown because it won’t affect sponsorship, but some things are shelved for fear of losing corporate sponsorship. In order to encourage exposing white collar crimes, policies preventing the accusing from retaliating should be put into place. Also, some form of compensation should be met to those who risk their livelihood to do what is right. Not an excessive compensation, but compensation nonetheless. However, I do not believe anything will ever completely help. Companies will still be able to  blacklist and financially and socially ruin a whistleblower. It cannot be prevented. Also, they can still pull their money out of local stations. The companies have a lot power, and they are hard to fight. 6. How can corporations ensure that their employees behave ethically? Corporations can ensure that their employees behave ethically, by showing a good example of ethical behavior at the top. It begins with the CEO and senior management. If they display ethical behavior, the employees will follow suit. The work environment would become a do as I do vs. do as I say environment. Also, a clear and sound structured work environment is necessary. Internal controls need to be in place to create a check and balance system. This system would leave less room for unethical behavior. Last, continuous training on what is expected from the company and company policies would also be effective. A reminder on what is expected and accepted (or not accepted) is a good way to keep employees in line with company objectives.

Poverty: Most Serious Problem in the Whole World

I choose poverty as my topic for my essay because poverty has been considered as the most serious problem not only In the United State, but also In the whole world. It has been playing an important role In developing the entire society. There are three different theories In analyzing how society Influences people, and how people Influence society, which are functionalism, conflict theory, and symbolic Interaction.There are five social Institutions In functionalist perspective: family, government, economy, religion, and education. View poverty from functionalism perspective, It stops the development of the whole society. The effects of poverty to society Is a very long list. Illness, crime, and hunger are major effects of poverty on society as a whole. Some of these effects can also be considered as a cause for poverty. Poverty also can lead to poor education for those children who are effected by poverty. It also will lead o revolution from the lower class people, who are suffering p overty, against the government.Sometimes it will also cause terrorism. But on the other hand, poverty can also create some jobs opportunities. Manifest function, consequences which are intended and recognized by the participants in a system, of poverty is that it gets the â€Å"dirty work† done. Latent function, consequences that are neither intended nor recognized, of poverty is that it separates people from different classes. Latent dysfunction of the poverty is that it will only enlarge the gap between the rich and he poor. Conflict theory is more focused on controlling the scarce resources..Apply conflict theory to poverty, the poor will try to get out of their situation while the rich will do their best to protect the scarce resource. In this case, the scarce resource is money, The struggling groups of poverty are the â€Å"have onto† , and these â€Å"haves†, rich people, gain a lot more power in this case. Rich people have more power In an economic way, m oney. They want to keep their benefits, and they can give their children some advantages in this way at the same time. If the poor wins more power In this struggle, one of the biggest changes In would be wages.In this society, more money produces more power, more power produces more money. The riches will get richer, the poor get poorer. The third theory Is symbolic Interaction. It relies on the symbolic meanings that people develop and rely upon In the process of social Interaction. In poverty, people who are labeled poor are always stigmatize as lazy, lack of motivation and education, or sometimes even criminal while wealthy people re always considered capable, hard working, well-educated and motivated.It separates people from different classes communicating with each other, that way It enlarges the disparity between the rich and the poor. In a conclusion, poverty Is one of the most rigorous issues right now In our society. It applies to these three different theories in different ways. The theory that I agree with the most is the people are really trying their best to narrow the gap between the rich and poor, but it really takes some sufferance to overcome those difficulties.