Osmosis Sodium Chloride and Onion Cells Essay Example

Osmosis: Sodium Chloride and Onion Cells Paper Osmosis/Plasmolysis Lab Name: Problem: How do solutions of various salt concentrations influence osmosis in relation to an onion cell? Materials: (per student group): red onion epidermis forceps, dropper distilled water NaCl solution paper towels microscope slidecover slip Procedure 1. Make a wet mount of the red onion epidermis. 2. Examine under low power. When you have a clear view of several cells, switch to high power. Make a labeled drawing (cell wall, membrane, cytosol) of your cells. This will give you a record of the original appearance of the onion cells. . Take a dropper and add several drops of salt solution to one side of your cover slip while placing a small piece of paper towel along the opposite edge of the cover slip. The paper should draw out the water and draw in the salt solution. 4. Observe the effects of the saline (salt) solution on the onion cells. Make a properly labeled, careful drawing of the cells appearance. ? 5. Replace the sodium chloride (NaCl) solution with distilled water in the same way that the salt solution was added. Make a properly labeled drawing of the cells ? ppearance in the space provided. Answer the following questions: 1. Draw a diagram to indicate the relative proportions of salt and water within the onion cells and outside the onion cells when they were placed in the saline (salt) solution. Use X to represent solute and to represent solvent Also use an arrow to properly indicate the direction of osmosis. ? 2. Draw a diagram to indicate the relative proportions of salt and water within the onion cells and outside the onion cells when they were placed in the distilled water solution. We will write a custom essay sample on Osmosis: Sodium Chloride and Onion Cells specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Osmosis: Sodium Chloride and Onion Cells specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Osmosis: Sodium Chloride and Onion Cells specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Osmosis Sodium Chloride and Onion Cells Essay Example Osmosis: Sodium Chloride and Onion Cells Essay Osmosis/Plasmolysis Lab Name: Problem: How do solutions of various salt concentrations influence osmosis in relation to an onion cell? Materials: (per student group): red onion epidermis forceps, dropper distilled water NaCl solution paper towels microscope slidecover slip Procedure 1. Make a wet mount of the red onion epidermis. 2. Examine under low power. When you have a clear view of several cells, switch to high power. Make a labeled drawing (cell wall, membrane, cytosol) of your cells. This will give you a record of the original appearance of the onion cells. . Take a dropper and add several drops of salt solution to one side of your cover slip while placing a small piece of paper towel along the opposite edge of the cover slip. The paper should draw out the water and draw in the salt solution. 4. Observe the effects of the saline (salt) solution on the onion cells. Make a properly labeled, careful drawing of the cells appearance. ? 5. Replace the sodium chloride (NaCl) solution with distilled water in the same way that the salt solution was added. Make a properly labeled drawing of the cells ? ppearance in the space provided. Answer the following questions: 1. Draw a diagram to indicate the relative proportions of salt and water within the onion cells and outside the onion cells when they were placed in the saline (salt) solution. Use X to represent solute and to represent solvent Also use an arrow to properly indicate the direction of osmosis. ? 2. Draw a diagram to indicate the relative proportions of salt and water within the onion cells and outside the onion cells when they were placed in the distilled water solution. We will write a custom essay sample on Osmosis: Sodium Chloride and Onion Cells specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Osmosis: Sodium Chloride and Onion Cells specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Osmosis: Sodium Chloride and Onion Cells specifically for you FOR ONLY $16.38 $13.9/page Hire Writer

Open enrolment Act in California

Open enrolment Act in California The open enrolment policy was enacted into law in 7 January 2010 before it became effective in April of the same year (Rho-ng Noteware, 2011). This came into existence after a requirement from the legislation that the department of education in California should reproduce a list of 1,000 California schools that had low achievers.Advertising We will write a custom report sample on Open enrolment Act in California specifically for you for only $16.05 $11/page Learn More These schools came to be known as open enrolment schools. The act actually required that parents with children attending either of the schools to transfer the children to other schools if the school had a good ranking in terms of performance than the former school (Kemerer Sansom, 2009). The aim or the purpose of the open enrolment policy was to upgrade student’s performance and to give parents the opportunity to send their children to schools of their choice. The policy was for increa sing the enrolment choices that were available to the parents by removing the state’s restrictions on school enrolment. Raffel (1998) stated that, the act prohibited the discrimination on the transfers. The main impact that resulted from the policy concerning the removal of the restriction was that parents could have a wide range of schools to choose from and therefore they could send their children to schools according to their abilities. The policy had a direct impact on the student, whereby allowing the students the opportunity for transfer to higher achieving school meant that the student’s academic performance would improve. Secondly, the schools listed as â€Å"persistently lowest achieving,† or PI had their listing or ranking based on the federal government’s provisions or criteria. The criteria used by the federal government was found out to be based on statistics and for this reason it was not an actual representation of the situation on the grou nd. Therefore, the findings were that the students were subjected to transfer in order to take them to high achieving schools but later they found themselves in a school with the low performance. The act encouraged students to transfer and this had an effect on their academic performance due to the changes of the social and physical environment. The points of the act identified and excluded certain schools from the list of enrolment. Community schools were in this category of schools whose enrolment was below 100 test scores and juvenile court schools. The students from those schools were affected by the changes since they were in a lack of interactions from students from outside schools.Advertising Looking for report on law? Let's see if we can help you! Get your first paper with 15% OFF Learn More Because of the enrolment, schools were restricted in some measures and the students from those schools did not have any chance of interacting with students from h igh achieving schools and, for this reason, their performance on test score could not be improved. The policy was also found to have issues of concern especially when Single Schools in the district were considered (Korgen, 2008). It was found out that the policy contained some statues, which made it not clear whether the district single schools are included on the open enrolment list or not. This, therefore, left the parents and the students in a situation when they could not make an accurate decision on matters concerning transfers and performance of these schools. The policy was also found to have statues that affected the transfer of students whose parents either were military personnel or had served in the military. Concerning the students, the policy was found to lift the deadline on the student’s transfers if the transfer was carried out within 90 days after the application was submitted. These clauses were therefore found to be of great benefit to this particular kind of students especially when their parents were transferred from their workstations. The policy could therefore be said that it made the transfer process of this category of students easy. The extension of the period also allowed the parents and the students to make informed inquiry about the school that they were planning to send their children. The parents and the students therefore could make all the necessary arrangement that were necessary before the student joined the school. Sometimes different high schools in the state had different requirements that were needed for graduation. This was found out to be a major issue that could affect transfer of students in the state of California. The open enrolment policy was found to address this issue by authorizing all the students who had applied for transfers to be allowed to complete the graduation requirements in the school of enrolment. This was of benefit to both the parents and the students. To begin with, the students had been sa ved the extra work of working in two different schools at the same time and therefore they could concentrate with one school. The parents were also found to benefit from the policy by saving on the expense.Advertising We will write a custom report sample on Open enrolment Act in California specifically for you for only $16.05 $11/page Learn More Conclusion The open enrolment policy was enacted in the state of California. With this policy in place, parents had the opportunity of transferring their children from the schools that had been ranked as low performers to schools that had been listed as high performing. The policy therefore encouraged the transfer of students from one school to another. In some cases, transfer of students is of benefit to both the parents as well as the students especially based on academic performance, and the policy therefore provided for this transfer. I hence recommend that the policy should be adopted. References Kemerer, F., Sansom, P. (2009). California school law. California: Stanford University Press. Korgen, K. O. (2008) Contemporary readings in sociology. California: Sage Publishing Ltd. Raffel, J. (1998). Historical dictionary of school segregation and desegregation: The American. West Port: Greenwood Publishing Group. Rho-ng, E., Noteware, M. (2011). Open enrolment act got choice†¦ what now? California: Schools Boards Association.

A stereotype is defined by the Oxford Dictionary

A stereotype is defined by the Oxford Dictionary Every individual holds stereotypes. A stereotype is defined by the Oxford Dictionary of Psychology (pg. 730) as: ‘a relatively fixed and oversimplified generalisation about a group or class of people, usually focusing on negative or unfavourable characteristics’. When people put too much faith in stereotypical descriptions of people they can become prejudiced and can often discriminate against other groups. This can be very harmful and has led to countless atrocities, such as the racial purging of the Jews by the Nazis. Prejudices still are being fought through laws, such as Equal Opportunities legislation. However, the subject being discussed is not whether stereotypes are harmful or justifiable; it is whether they have a practical purpose, or are wasteful. It is generally the common consensus that stereotyping and prejudice should not continue. However without stereotypes we may find the social world a lot harder to perceive and understand. We rely on stereotypes to h elp us function in society. With such a diverse population, the environment we live in could be very confusing. Unfortunately stereotypes may block out a lot of what makes our society so diverse and just group people into simple categories. They may also affect peoples’ choices in life. Career paths people may want to take could seem inappropriate for someone in their group and so are avoided. From an evolutionary standpoint, stereotypes must have a use because they exist. People start creating stereotypes from a very young age and they are hard to break. However, having a purpose doesn’t exclude the fact that stereotypes are wasteful. The main beneficial use of stereotypes is that they greatly speed up cognitive processing. The world is full of people, they all look unique and the all behave differently. If each person chose to actively perceive and evaluate every individual they encountered, there wouldn’t be much time for anything else. This is why stereotype s exist. People can glance around a room, see a spectrum of faces and not have to stop to think about each person. This frees up the brain for more important tasks. Macrae, Milne, & Bodenhausen (1994) as cited by Taylor, Peplau, & Sears (pg. 184). conducted an experiment to see if the priming of stereotypes can leave the brain freer to process other information. Students were presented with a list of trait words for an individual and, at the same time, information about Indonesia. Half of these students were first given a group label for the individual, e.g. Black or Italian. Those given the group label remembered more traits that were label consistent and more information about Indonesia. This demonstrates that stereotypes make the social world a lot easier to process and are definitely very useful. However, this oversimplification of the world we see can lead us to prejudice against other groups, and can lead to discrimination. People often look only at the negative characteristic s of a group. In doing this we may waste the important contributions that these different groups’ perspectives can offer. Taylor, Fiske, Eticoff, & Ruderman (1978) as cited by Taylor et al. (pg. 185) asked participants to observe a conversation between people of a mix of races. When asked to remember which individual made certain contributions the participants would often only be able to remember the race of the individual. This shows that people often place far too much emphasis on group membership and can ignore the attributes of the individual. This can lead people to ignore information that comes from a source that they may deem inferior.

Engineering ethics Case Study Example | Topics and Well Written Essays - 1250 words

Engineering ethics - Case Study Example Within any given integrated work place, a coherent code of conduct is used to manage behavioral conduct of employees. This code of conduct outlines the principles and values required of every employee when conducting any duty within a  social setting. Apart from laws and the code of conduct, ethics determine the professional behavioral pattern demonstrated by employees. Ethics relate to an individual’s philosophical principles and beliefs. Ethical practices involve adoption of elements like honesty, loyalty, commitment and avoidance of conflict of interest in professional duties. In any professional training, an individual is informed of the required ethical elements which all employees working in a certain professional accord should follow. At this juncture, we will begin by appraising the code of conduct that defines ethical principles required of engineers. Engineering, which is mostly concerned with the welfare of the society, should depict high levels of ethics in its a pplication. Therefore, engineers should display ethical conduct in every activity pertaining to their profession. With respect to the underlying case study, Giffels faces a dilemma situation where he is required to make an ethical decision within the line of duty. Before we begin evaluating Giffels’ case from a theoretical perspective, it is appropriate that we acknowledge some of the ethical requirements of every engineer in the field. From the NSPE, which outline the code of ethics for engineers, engineers have a professional obligation of informing his/her clients when they belief that a certain project has some defects. In addition, engineers should not engage in activities that serve to advance their professional status by untruthfully presenting information about projects. According to the rule of practice, engineers should prioritize safety, health and the general welfare of the public in all professional duties. When charged with a responsibility of approving a projec t, engineers should only approve projects that conform to the applicable engineering standards. Moreover, every engineer should carry out professional assignments with the highest standards of honesty and integrity. At this juncture, acknowledgement of these ethical principles facilitates appraisal of Giffels’ case in an objective manner. Relevant theories concerned with ethical standards will prove helpful in understanding professional ethics from a theoretical perspective. The underlying case concerns an engineer faced with a situation requiring an ethical decision making process. Giffels has a professional duty of installing equipment in a government facility. However, this facility does not meet the required engineering standards in its constructions. Giffels notice that the responsible designer did not consider the issue of safety in terms of fire and escape routes in the facility. In addition, the designer did not submit details on how Giffels should install the require d equipments with respect to the issues of safety. Giffels evaluated this situation from an ethical perspective. Although his duty was to install the equipments, he considered the aspect of public safety in the project. This made Giffels consider approaching the concerned parties for assistance. The designer rejected his claim saying that Giffels duty is to complete the

Managed care Essay Example | Topics and Well Written Essays - 1500 words

Managed care - Essay Example The graphical representation below illustrates that in the year 2013, employer-sponsored health insurance has been registered at less than 1% of employees in traditional fee-for-service plans. In the recent years, high-deductible health plans have gained popularity wherein the share of managed care registration has declined proportionately. Additionally, it has been noted that traditional health insurance has been in the stage of extinction today. It has been also identified that High Deductible Health Plans paired with a saving option (HDHP/SO) has been included in the survey of health plans registration from the year 2008 (Kaiser Family Foundation, 2014). The health care service, i.e. managed care, has its origin in the United States, but the tools of managed care have spread on a global context. Identifiably, in most of the European countries, general practitioners are entitled with the task of regulating access of the specialists and have responsibilities over a per capita annual budget (Deom et al., 2010). In the United States, managed care has evolved as necessary principally because employers are facilitated with the opportunity of strengthening the health insurance premiums, as compared to the struggles faced by the employers in terms of unaffordable excesses due to the uncontrolled delivery of services. In the insurance system that has existed before the managed care, insurance companies are recognized to overlook the need for any incentive for managing different aspects that included service delivery and payments related to the same. In this respect, due to the lack of controls in factors such as over delivery and payment, it has been identified that the employers had to face the issue relating to costs. Subsequently, a system is needed to be developed with the aim of controlling excessive costs by integrating delivery as well as payment with functions

Bram Stoker Essay Example for Free

Bram Stoker Essay Within Dracula, Stoker clearly presents the male characters in the book as heroes, without over emphasising this by giving them extraordinarily strong powers. They are portrayed as normal human beings with faults and weaknesses. This can be seen when Van Helsing suffers from hysteria, but despite this still plays an important role in the chase for Dracula, and brings confidence to their quest at desperate times. He describes the Band of Brothers as those , who are willing to peril even our own souls for the safety of one we love-for the good of mankind, and for the honour and glory of God. A similar comparison could be made to fictional characters/super heroes in comics such as Superman. They save the weak and bring down the villain while also leading normal lives. But despite doing this, these super heroes still posses certain vulnerabilities, in the instance of superman, he possesses a weakness to kryptonite. In the same sense, members of the brotherhood have their own weaknesses. Therefore, it is fair to say that there is some presence of a comic book nature in Stokers writings, and the characters in the book represent this. Stoker does well not to make the characteristics of his male heroes all man and butch, like our version of the male hero today. I believe Stokers view of the perfect hero, is one that is physically strong but in touch with his feminine side. I believe such a character to be Van Helsing. At the opening of Jonathan Harkers journal it says, God preserve my sanity, and later Dr. Seward says, What does this all mean? I am beginning to wonder if my long habit of life amongst the insane is beginning to tell upon my own brain. Clearly within the novel, the male characters show signs of tenderness and sensitivity, which would be an imperative trait for a women of the time. Despite this, within the Band of Brothers each individual member have their own personal weakness, and this again parallels to that of a super hero in a comic book, (an ideal present day hero), how everyone has their own weaknesses, and often all have a universal weakness, eg. Breathing, in a comic world. In this case, the universal weakness of the Band of the Brothers is the shared love and protective nature over their women/partners. I believe that the men in the novel feel threatened by Dracula, who is a perfectly attractive, who is physically powerful, and more importantly targeting their women. The men may have felt that this new species may lure their women away from them, since it can be seen that his prey needs some sort of willingness or co-operation for him to act. It is not clear in the novel if Jonathan and Mina have consummated their marriage, since Jonathan was in such a bad state at the time of the wedding, yet later in the play he again shows inadequacies in the bedroom department, and can only watch Mina sucking at the chest of Dracula having been paralysed by the more dominant figure, Dracula. In the novel, personal and universal strengths and weaknesses are present in the Band of Brothers. Since all the characters concerned are human, there is no distinct line between the two, perhaps rather they represent individuality of characters. Due to the groups enthusiasm, and their keenness to save their beloved from Dracula, they play directly into the hands of Dracula, and this can be seen in London. This shows that the eager and hunger of the man exploits their weakness of not thinking correctly, rushing into things and a little gullibility. Mina is left alone at the house a sitting duck for Dracula to attack, a thoughtless action showing human weakness. However the group show great dedication and understanding to the task in hand as Van Helsing says, Our toil must be in silence, and our efforts in secret; for in this enlightened age

socio-economic development and health Essay -- essays research papers

Question One There are a number of ways in which the increasing socio-economic development of a nation can help improve the health of the population. 1.  Ã‚  Ã‚  Ã‚  Ã‚  There is a correlation between mortality rates in the developing countries, especially amongst children, and the level of education of the parents of the children. For example, in Morocco, a mother who has completed 4-6 years of schooling, their child is 45% less likely to have died by the age of 2, compared with child’s mother who has had no school (Book 3, Page 54). Education improves the overall knowledge of looking after oneself and others, but also enables people to gain higher income levels, and thus, acquire purchasing power to buy the goods (if available), which will help them improve their quality of life. 2.  Ã‚  Ã‚  Ã‚  Ã‚  Food provisions are a necessity to maintaining a healthy population. There are many facets to food, mainly the distribution and supply of food, and the quality and nutritional ingredients of food. Food needs to be of good, sustainable quality so that it provides people with the basic supply of vitamins and minerals to live, and has to be easily accessible so that everyone in the nation can benefit. Developed countries have pioneered the way of preserving food for longer (i.e. use of plastics), and developing countries have benefited from this, but the developed world has also introduced new fear factors regarding food such as contamination (BSE, Salmonella etc) and additives, and, the long term effects of such advancements is beginning to materialise (Book 3, Page 306-307). Developing nations need to maintain a balance of growth, by producing enough food for the nations own consumption, but also growing food for exportation, which will improve their GNP and thei r overall growth as a nation. 3.  Ã‚  Ã‚  Ã‚  Ã‚  Reducing the gap between the social classes will provide a better overall health and wealth of a nation. Those living in the lower social classes have a lower life expectancy than those in higher social classes (Book 3, Page 216). There are many tools and precautions that may be used to bridge the gap. Occupations within the social classes tend to be more manual and risk-based occupations such as mining or engineering. In recent times, Acts of Law have been passed by Governments to protect employees, and as such... ... in further research. The developed world cannot be complacent in its attitude towards communicable diseases. As more and more people are able and free to roam from country to country, so it becomes harder to ensure that adequate strategies can be enforced and that the appropriate vaccines have been administered. Therefore, there still has to be concerted efforts from the developed and the developing world that a multi-disciplinary strategy can be adopted and enforced, and only by such mechanisms can the long-term goal of eradicating communicable diseases be achieved. References Szreter,S (1998) ‘The importance of social intervention in Britain’s mortality decline c. 1850-1914: a re-interpretation of the role of public health.’ in Davey, B, Gray, A and Seale, C (eds) Health and Disease: A Reader, Open University Press, Buckingham. U205 Health and Disease Book 3 (2001) World Health and Disease, Gray,A, Open University Press, Buckingham. U205 Health and Disease Book 1 (2001) Medical Knowledge: Doubt and Certainty, Seale, C. Pattison, S. and Davey, B. (eds), Open University Press, Buckingham. VC 1265, Video 1, ‘South Africa: Health at the crossroads’ Open University.