Jimmy Carter Essay Example

Jimmy Carter Essay Jimmy Carter became the thirty-ninth President of the United States of America on January 20, 1977. During his Presidency, he fulfilled campaign promises to develop a national energy program, protect the nations natural resources and aid education. The Egypt-Israeli Treaty of Peace and the Panama Canal Treaty gained the president worldwide recognition. Out of all the parts of Carters Foreign Policy, the two parts I found most interesting was human rights, and the strengthened ties with China. Out of the Carter administrations foreign policy, human rights were the foundation. In Carters Inaugural Address on January 20, 1977 he said, Our commitment to human rights must be absolutethe powerful must not persecute the weak, and human dignity must be enhancedThe world itself is now dominated by a new spirit. Peopleare craving, and now demanding their place in the sun- not just for the benefit of their own physical condition, but for basic human rightsBecause we are now free, we can never be indifferent to the fate of freedom elsewhere.No other issue was so close to Jimmy Carter than human rights. The President was committed at home and abroad to human rights and this gave the people trust and courage.He accomplished his goal by public verbal protest, private diplomatic persuasion, and military and economic consensus.One example of how the President was committed at home is when he addressed a congregation of civil rights leaders at Ebenezer Baptist Church here in Atlanta.Even the Presidents wife, Roselyn Carter, was involved in human rights. In November 1979, Roselyn Carter flew to Thailand to visit relief centers caring for refugees of the Vietnam-Cambodian War. Upon her return to the Untied States, thefirst lady spoke about her experiences on nation-wide television and her efforts brought aid to thousands. Even in Carters Farwell A

Strategic Analysis essays

Strategic Analysis essays The United States offers a stable economy for the semiconductor industry but one that is not growing as rapidly as some of the other key markets. In 2004 the GDP for the United States was estimated at $11.75 trillion with a GDP growth rate of 4.4%. The United States is not expected to experience a sharp increase in GDP with growth probably hovering around 4% to 5%. What the United States lacks in growth it makes up in stability. The United States provides a stable economy for semiconductor companies in which to operate. The United States also has a relatively low rate of inflation with a 2004 estimate of 2.5%. It is important for a country to have a low inflation rate so that consumer prices remain stable over the years. Investment of businesses in fixed capital such as factories, materials, and equipment is another key economic indicator that affects an industrys external environment. In 2004 15.7% of the GDP consisted of investment by businesses in capital assents. This wa s the lowest rate among the four key markets in which the semiconductor industry operates. This low number is a reflection of the decline in GDP growth that is currently occurring inside the economy of the United States. This rate also reflects that many companies may be investing in capital assents in other countries that are experience faster growth. The unemployment rate in the United States though is among the lowest of the four key markets, with a rate estimated in 2004 to be 5.5%. An unemployment rate in the United States near 5% is understood to mean that the economy is at full employment. It is impossible to have a rate of unemployment of zero due to the nature of employment cycles there will always be some that are unemployed but looking for jobs. A low unemployment rate also represents a strong and stable economy. The United States though is faced with a very large trade deficit, and imports for 2004 were estimated at $1.476 trillion ...

Causes of Anorexia Nervosa Essay Example for Free

Causes of Anorexia Nervosa Essay Many people wish to have a perfect body. Desires of having a perfect body could lead to a disorder called, anorexia nervosa. This disease is an eating disorder characterized by low body weight and a fear of becoming overweight. Anorexia nervosa is mainly related to an individual’s emotionality. Some of the causes of this disease are, personal feelings, stressful events, and cultural influences. The first cause of anorexia nervosa that is the most important cause is a worthless personal feeling. A person who has a low self-esteem usually feels valueless. Despite achievements in his or her life, they do not like the way he or she looks. These feelings cause the individual to feel rejected and have an alleged pressure from the society. Teens become very depressed when they are over weight, because people tease them and they feel that they cannot fit in with the crowd. Even if a teenager is not overweight, one may feel that they must maintain their body size. As a consequence, an anorexic person is always looking for the perfection, causing them to have a feeling of worthlessness. The next cause of this disorder is the existence of stressful events in life. Although anorexia is linked to a physical condition, the real cause is related to an individual’s emotionality. Someone may usually feel stressed and worried when they are working and are under pressure. The feeling of stress can cause one to not feel like eating. Commonly people suffer nervousness as a consequence of experience and life changes. These situations begin to affect the schedule of daily living. People can become very busy and feel that if they skip a meal it will be okay. Sometimes if more than one meal is skipped, this can lead to someone not participating in vital activities to stay healthy. In the case of anorexia nervosa, a person is stressed and begins to stop eating in the right times or even stop eating altogether. Another cause of anorexia is the cultural influence of the country where we live today. In many societies, they consider that the ideal beauty is based on extreme thinness. In today’s society, this idea has caused thousands of women and men to turn to starvation, diets, or people use products that supposedly make them lose weight in a few days. Being extremely thin has become an important factor for people. To many people being thin represents beauty, success, happiness, and self-control. People are targeted with messages from the media that they must diet to meet this standard. This â€Å"ideal† body image is almost impossible for most people to reach, leaving them very dissatisfied with their body image. The causes of anorexia nervosa are situations that may look normal, but have deathly consequences. This is a serious, possibly terminal illness. People, who have this disease have, negative personal feelings, stressful events in their life, and cultural influences. Causes of Anorexia Nervosa. (2017, Jan 21).

Solar Energy Harvesting Term Paper Example | Topics and Well Written Essays - 750 words

Solar Energy Harvesting - Term Paper Example The device is essentially composed of a ‘light sponge’ of nanoparticles. The dye-sensitized property means that the titanium has a monolayer of absorbed dye which increases the likelihood of photon capture (Tulloch, 2004). Nanostructured semiconductor films have been identified as suitable for applications in solar cells as their physical and chemical properties make them ideal. These nanostructured films utilize these dye-sensitized photoelectrochemical solars(PES) cells. The large surface area of nanoparticles means that they are capable of harvesting large amounts of solar energy. There is a sensitizer grafted into the titanium. Light induced electrons are injected from the absorbed dye into the nanocrystalites and makes the titanium conductive (Gratzel, 2003). There are so far two concerns which have been identified in the application of these PESs. They are related to the ‘maximum light harvesting of sunlight and the efficient collection of photocarriers at electrons’ (Rodriguez et al., 2007). Both of these issues have attracted a large amount of research interest. This is mostly due to the interest which many governments have shown in recent years in developing ‘green technologies’ for energy generation. Solar panels are an ideal way of harvesting energy in a green way, but for them to be successful on a large scale as a replacement for power stations they must be efficient at harvesting and storing large amounts of solar energy. To address the issues of PES optimization research has focused on a number of issues with the composition of the solar cells. One of the key areas on which manufacturers have focused is in optimizing the chemical composition of titanium. Improvements in technology may allow for a thinner form of titanium to be manufactured which would overall allow for thinner titanium layers to be applied to solar applications. This would result in a reduction in recombination of photoexcited carriers, which would increase PES cell efficiency.

Comparison and Contrast between life before internet and after Essay - 2

Comparison and Contrast between life before internet and after internet - Essay Example Likewise, telephonic messages that actually came into existence before internet helped people in conveying messages from one place to other regardless of geographical location. This particular fact provides evidence that life of people before and after internet has been quite similar in relation to the messaging system. This is because the system of exchanging messages through text messages and mails tends to be quite similar. Internet has resulted in changing peoples’ life pattern, however, the rudimentary social pattern of life has remained the same irrespective of the changes induced by internet. It has been revealed that the communication system of youngsters have persisted to be the same i.e. most of them use the conventional means of social interaction wherein internet is executed like a telephone.Therefore, it can be affirmed that the life of people before internet and after internet has remained the same in relation to their social interaction process and psychological well-being. In fact, internet has created a platform for enhancing the traditional interaction process along with evolving relationships amid individuals in the society. Thus, the social and psychological paradigms of peoples’ life have been quite similar before and after the initiation of internet. On the contrary, there has been a huge difference in the life of people before internet and after internet. People in order to entertain themselves used to devote more time to watching television or through other means such as visiting parks.

Children or adults that are not listening through general disrespect Essay Example for Free

Children or adults that are not listening through general disrespect Essay If you make eye contact with the adult or child you can draw their attention towards you. Calling out a childs name will make them turn to face you so that you can talk to them. If you lower the tone of your voice and talking in a quiet calm manner, the adult or child would have to concentrate more to try to hear what you are saying and will also help calm an active child down enough to listen to you attentively. Its also an affective method to calm an angry parent who is shouting and doesnt want to hear what you are saying. You could also hold a childs hands so they know its them that you are talking to. You could adapt the surroundings, like taking a parent or child into an office to talk to them. If an adult is angry and is not listening to what you are saying, you could also let them have their say first so that once they have voiced their opinion they will be ready to hear what you have to say. Hearing impairment and speech impediments Using sign language and speaking clearly helps us to communicate with hearing impaired people, they can understand what we are saying through lip reading and the sign language will help emphasis that. If people have speech impediments it is important to allow them plenty of time to speak, rushing them can make them nervous and make the impediment worse or stop them from communicating at all. Using flash cards is also another way of communicating, with children and adults that have hearing and speech problems. (see attachment) Behavioural problems and learning difficulties If a person you are communicating with has behavioural problems or learning difficulties it is important that you are patient with them. Using simple language with people with learning difficulties help them to understand what you are saying. By identifying the problem then trying to understand it, you can find ways in which to adapt your approach to a way that they will understand you. If a child is hyperactive, trying to get them to sit down and hold a conversation will be difficult, but doing it through play is a way to hold their concentration. English not being the first language (ESOL) Using simple vocabulary will improve understanding and using body language and hand gestures help by emphasis what is being said. A good way of communicating with parents/carers that dont use English as a first language is by compiling a multilingual newsletter, where you can put across any information and not have miscommunication. You can also set up a buddy system with adults or children, where there maybe another child who is bilingual that can help translate. Shy or timid people Interacting with adults and children on a one on one basis helps to communicate with introvert people. With adults this could be in the form of a meeting, and with children this can be through play. Circle time is another way of helping shy children talk, asking individuals questions or singing songs. Not getting on with colleagues or dealing with two faced people Holding staff meetings with a unbiased coordinator gives staff a chance to air their grievances and find a possible resolution to them. Team building exercises can also help people get along, through play with children to colleagues being put on a project together. With children you can also reinforce club rules, and with colleagues you can reinforce policies. You can also used role play and read stories, giving children a different view on what they are doing wrong and see how treating their peers bad affects them.   Not making time or effort to communicate Arranging meetings with staff or parents/carers will give enough notice for them to make time for a meeting. With children you can use circle time as an opportunity to have class discussions.

Theme of Power Corruption in Animal Farm, by George Orwell Essay

Power can have the persuasive action in undoing the moral ethics of one’s character. This can be seen throughout history, such as World War II and proven by the actions of Napoleon in the allegory, Animal Farm, by George Orwell. As Lord Acton said â€Å"Power tends to corrupt and absolute power corrupts absolutely.† In history what was viewed as a villain or wrong doer is never the same as the perception. A leader does not begin wanting to do wrong, they start with the best intentions, but power is a tricky thing, showcased in Animal Farm as Utopian ideals but with failed practices. Most new societies that have a Utopian idea most likely stem from a traumatic event where humanity believed it had no other choice but to go to the extreme. Animal Farm does the same thing; these animals feel mistreated by their leader, Mr. Jones so they follow the pigs in order to create a Utopia. In The Giver, by Ray Bradbury, everything appears perfect but there is a glitch that is often hidden in the powers that rule. In The Giver it was the simple truth of life and how they, the powers that ruled, deemed to control it in order to create their own Utopia. These powers, whether the government is one single ruling body, or many, the slow gain of power feeds and justifies any wrong doing. As Napoleon first started out along with the other pigs, they made the seven commandments. Napoleon enforced "The Seven Commandments† which include statements such as, â€Å"Whatever goes up on two legs is an enemy,† â€Å"No animal shall wear clothes,† â€Å"No animal shall drink alcohol,† and â€Å"No animal shall kill any other animal.† By the end of the book, Napoleon breaks all of these commandments for his personal gain. Napoleon uses his power to alter the commandments in order t... ...mal Farm. Ed. Terry O'Neill. San Diego, Calif.: Greenhaven Press, 1998. 70-81. Rpt. in Short Story Criticism. Ed. Joseph Palmisano. Vol. 68. Detroit: Gale, 2004. Literature Resource Center. Web. 25 Nov. 2013. 3. Kirschner, Paul. "The Dual Purpose Of Animal Farm." Review Of English Studies 55.222 (2004): 759-786. Literary Reference Center Plus. Web. 25 Nov. 2013. 4. Richard I Smyer. Some Perversions of Pastoral Animal Farm: Pastoralism and Politics Twayne's Masterwork Studies 19. Boston: Twayne Publishers, 1988. p30-66. COPYRIGHT 1988 Twayne Publishers, COPYRIGHT 2010 Gale, Cengage Learning 5. Lowry, Lois. The Giver. Boston: Houghton Mifflin, 1993. Print. 6. Shakespeare, William. Macebeth. Ed. Rex Gibson. Cambridge: Cambridge University Press, 2005. Print. 7. "The Holocaust." National Parks Service. National Parks Service, 16 Nov. 2013. Web. 24 Nov. 2013.

Molecular, microbial and environmental factors that affect the bioremediation of oil-polluted sites

Bioremediation is a process by which a polluted environment is treated with microorganism so that they are allowed to return back to the previously existed state of normal. This technology is very useful to control oil-spills and prevent greater problems from arising due to pollution. Bioremediation is useful to take care of organic pollutants, and usually harnesses naturally-occurring forms of the microorganisms. However, the ability of the microorganisms to degrade oil is improved in certain situations by altering their genes, especially by introducing genes of other microorganisms (especially bacterial or fungal strains).Some bacteria and fungi are capable of multiplying and degrading hydrocarbons. Chakrabarty, a Professor of the University of Illinois, was able to develop genetically-altered bacteria that were capable of degrading oil. Using genetically-altered microorganism in cultures may not help always be more effective to degrade hydrocarbons, compared to certain indigenous (naturally-occurring) microorganism. Studies have shown that it would be better to modify the environment that exists at the oil spill so that the naturally-occurring microorganisms can gain access to the oil, propagate in ideal conditions and be successful at degrading the oil.Introduction of a reporter gene (which expresses certain characteristics and makes the presence of the microbiological activity easily identifiable) may help to study the activity or presence of the indigenous microorganism population at the pollutant site. The ‘lux gene’ that expresses for ‘bioluminescence’ (production of light by living organisms) can be utilized to study biodegradation. Often, a competition may exist between naturally-occurring microorganisms and the genetically-altered ones for occupancy of the polluted sites.There are also chances that less effective genetically-modified microorganisms may occupy the site and cause fewer benefits. Further studies are needed in t his regard, to enable effective degradation of oil during oil-spills. Crude oil is composed of a number of hydrocarbons which have different types of structures. Different types of components are present in refined oils. Some pollutants may contain oil, pesticides and other compounds including organic and inorganic substances (such as heavy metals).An oil spill tends to spread over a large area. As oil contains a number of individual compounds, there is a need to utilize different types of microorganisms during the oil-spill. These microorganisms are capable of degrading the toxic substances present in the oil to less toxic forms by several processes such as aerobic respiration, anaerobic respiration, fermentation, dehalogenation, etc. The microorganisms can slow down movement of the pollutants by a process known as ‘biocurtain’ (absorbing hydrophobic organic molecules).They are also capable of being modified to other forms that are able to precipitate toxic metals. The microorganisms contained in a media capable of being dispersed by an aircraft or ship can be utilized to spread the substance. However, they also tend to spread to a large area. The importance of environmental modification was seen following the Exxon Valdez Alaskan oil-spill (1989). In this case, the environment was being modified in such a way that the conditions suited the naturally-occurring microorganisms to act and control the oil-spill.Fertilizers ware being added to the shoreline areas in order to help in the microbiological metabolism. These microorganisms needed three elements to survive, namely, carbon, phosphorus and nitrogen. Nitrogen and phosphorus were being supplied by the fertilizers, whereas carbon was provided by the oil-spill. These organisms then thrived in the ideal conditions, broke down the oil, at a rate three to five times faster than without the presence of the fertilizers.Several other environmental factors such as temperature, pH, oxygen concentration, pressure, salinity, turbulence, tidal flux, concentration of inorganic nutrients, and the nature and concentration of the pollutants play a very important role in the functioning of the microorganisms. In cold climatic conditions, ‘psychrophilic’ microorganisms seem to thrive, whereas in warm-environments, thermophilic microorganisms do better. Studies have shown that biodegradation of oil occurs at a faster rate at higher temperatures, and also decreases with a rise in the pressure.The microorganisms have to be appropriately chosen according to the conditions existing. Most of the microorganisms capable of degrading oil, use oxygen (aerobic respiration) and hence their activity directly depends on the oxygen concentration in the environment. Sometimes, during an oil-spill, the area may contain ideal indigenous microorganisms capable of degrading the oil, but there may be a reduced number of such microorganisms. Hence, efforts should be made to feed such microorganisms to the affected areas.

Motivation and Behavior Essay

Motivation refers to the process that drives an organism to behave the way it does. Simply put motivation causes an organism to eat, sleep, and drink and individuals to participate in the activities they find satisfying. Motivation can separate people into two categories optimist and pessimist. Optimists are those looking for the good in situations and pessimists finding the bad. Motivational sources can be described as extrinsic and intrinsic. Extrinsic is the motivation that comes from outside of the individual. Intrinsic is the motivation of an individual that comes from within. Motivation affects an organism’s behavior. Dr. Whitbourne describes six theories in here article from psychology today; instinct, drive reduction, arousal, incentive, cognitive and self-determination. Motivation As defined by psychology.about.com, motivation is defined as the process that initiates, guides and maintains goal-oriented behaviors. Motivation is the psychological process that tells humans what to do. A motivation causes humans and other species to drink, eat, play, sleep and reproduce. Without motivation there would be no reason for accomplishing anything. Within the motivation process there are different factors with each individual. Motivation can come in the form of positive motivation and negative motivation. These motivating factors eventually lead to an emotional state within the individual. Generally motivation creates to type of individuals that society recognizes and relates with; optimist and pessimist. Optimistic is disposed to take a favorable view of events or conditions and to expect the most favorable outcome, (â€Å"Optimistic,†2012). These are the individuals who tend to have a positive outlook on life. In most cases these individuals are look for the good in every situation. From dictionary.com, pessimistic is pertaining to or characterized as the tendency to expect the worst and see the worst in all things. Pessimists are those individuals who see the worst in everything . Sources of Motivation Extrinsic/Intrinsic Extrinsic is defined by dictionary.com as, not essential or inherent; being outside a thing; outward or external; operating or coming from without, (Extrinsic, 2012). Extrinsic motivation is simply that, things that motivate from the external. When looking at individuals who have extrinsic motivation, they tend to not enjoy certain activities, (Huitt, 2011). They tend to be a reward based group and need affirmation from an outside source. Throughout society many people can be found to fit this category of motivation. As shown a person who only writes poems to be submitted to poetry contests as well as a person who does not like sales but accepts a sales position for the amount of money he/she will make, (Psychology, n.d.). Intrinsic is defined by dictionary.com as, belonging to a thing by its very nature; of or relating to the essential nature of a thing; inherent, (Intrinsic, 2012). If extrinsic is from the external, the intrinsic is from within the individual. These individuals to things because it please them and they find the activity enjoyable, (Psychology, n.d.). These people are not concerned as much with what the outside world or society thinks. They are motivated from within. An example shows, playing chess because the individual enjoys effortful thinking, and a person reading a non-fiction book because they are curious about the topic, (Psychology, n.d.). Motivation and Behavior From an article written by Susan Drauss Whitbourne, Ph.D. motivation as the cause of behavior is examined. In her article Dr. Whitbourne discuss insights to explain the complexity of behavior. The instinct theory as Dr. Whitbourne refers to it as the biological set instincts that organisms have, (â€Å"Motivation: the why’s of behavior,† 2011). These factors are what tell organisms to do in order to survive, such as the lion hunting the antelope or a flock of geese migrating south for the winter. The second she describes is the drive reduction theory, (â€Å"Motivation: the why’s of behavior,† 2011). This theory talks about organisms and how they will try to just ensure that their needs are met and not look for anything else, (â€Å"Motivation: the why’s of behavior,† 2011). The article goes on to discuss how critics argue that if this theory were true no one would do thinks that were considered risky, (â€Å"Motivation: the why’s of behavior,† 2011). Third Dr. Whitbourne discusses the arousal theory, (â€Å"Motivation: the why’s of behavior,† 2011). Arousal theory is the opposite of drive reduction, (â€Å"Motivation: the why’s of behavior,† 2011). Arousal theory is the motivation which drives individuals to increase their stimulation and seek out things that are exciting and outside just what the individual needs, (â€Å"Motivation: the why’s of behavior,† 2011). Dr. Whitbourne goes on to discuss 3 more theories such as the incentive theory, cognitive theory, and the self-determination theory, (â€Å"Motivation: the why’s of behavior,† 2011).. Summary Motivation is the process that drives individuals to behave the way they do. Individuals are categorized into two, optimist and pessimist. There are multiple sources of motivations that can be describe as either extrinsic or intrinsic. Whatever the source, individuals are either motivated from within or the world around them. In an article written by Dr. Whitbourne, six theories are described which examine the â€Å"why of behavior.† References Extrinsic. (2012). In Dictionary.com Retrieved from http://dictionary.reference.com/browse/intrinsic Huitt, W. (2011). Motivation to learn: An overview.Educational Psychology Interactive. Valdosta, GA: Valdosta State University. Retrieved from http://www.edpsycinteractive.org/topics/motivation/motivate.html Intrinsic. (2012). In Dictionary.com. Retrived from http://dictionary.reference.com/browse/intrinsic Motivation: the why’s of behavior. (2011, October). Fullfillment at Any Age, (), Retrieved from http://www.psychologytoday.com/blog/fulfillment-any-age/201110/motivation-the-why-s-behavior Optimistic. (2012). In Dictionary.com. Retrieved from http://dictionary.reference.com/browse/optimistic Psychology and society. (n.d.). Retrieved from http://www.psychologyandsociety.com/motivation.html

6 Things to Do When Changing Jobs

6 Things to Do When Changing Jobs The days of the â€Å"company man,† are in the past. In fact, Americans tend to stay at their jobs for an average of just 4.6 years, according to the most recent report from the Bureau of labor Statistics. That means that these same Americans will hold a total of nearly 10 jobs during the course of their working lives. With the likelihood of so many job changes in your future, understanding best practices for moving on is essential. Read on for six tips to ensure that you leave your job on a positive note. 1. Give Ample NoticeWhile the phrase â€Å"two weeks’ notice† is often heard, there’s no hard and fast standard for how much lead time you need to give your employer. To make sure the timing of your resignation is acceptable, review your employee handbook or check in with a human resources representative.Also, keep in mind that your job history will stay with you as you move through life. Even if you despised your boss, it’s important to keep your relationship on good terms by turning in a professional letter of resignation.2. Do Your JobEven if you’ve handed in your resignation, your job is still your job. Resist the urge to be a â€Å"lame duck† and instead use this time to show you’re committed to the team even if you’re moving on. Make your best effort to complete all open assignments, and if you are unable to finish them up on time, leave a detailed report for your fellow workers or replacement.Speaking of your replacement, offer to help your boss with the search to fill your position. If your replacement has been hired, offer to help with his/her training.3. Cover Your BasesReview your vacation days, sick days, commission payments, outstanding salary, and any other compensation which may be owed to you. Schedule an appointment with your supervisor and/or a human resources manager to negotiate a fair settlement and confirm that you’re on the same page regarding what your final paycheck will look like.4. Don’t Let the Door Hit You †¦The old expression goes, â€Å"Be nice to people on your way up. You’ll meet them on the way down.† Just because you’re leaving a job doesn’t mean you’re cutting ties with the company and its employees. Before leaving, make sure you have contact information for your teammates.Also, take a moment to express your gratitude for the time you spent working alongside coworkers.5. Be PreparedYou may be happy that you’re leaving, but that doesn’t mean everyone else is. Your boss may make a counteroffer to ask you to stay, or your co-workers may make you try to feel guilt about abandoning the team. Keep your interactions professional and pleasant at all times.At some workplaces it’s standard operating procedure to have an employee escorted out of the building on the spot after tendering his/her resignation. Be prepared for this scenario by packing up all of your personal belong ings, removing personal files and software from your computer, and cleaning out your desk.6. Ace Your Exit InterviewExit interviews are standard operating protocol at many places of employment. Give some thought to what you’ll share about your reasons for leaving. This is a chance to leave your workplace one last parting gift: the opportunity to make it a better place for the next employee who fills your shoes.While an exciting new job remains ahead, you’re still employed by your current company until the last time you walk out that door. Following these six steps can help ensure a smooth transition to the next phase of your career.

Structure of the Nucleus, Endoplasmic Reticulum, Ribosomes, Assignment

Structure of the Nucleus, Endoplasmic Reticulum, Ribosomes, Mitochondria, Golgi Dody, and Lysosomes - Assignment Example The main function of the cell is to control the expression of proteins (as directed by DNA and RNA). The nucleus itself is a membrane-bound organelle, which means that it is slightly separated by a thin membrane from the rest of the cell components (Tortora & Derrickson, 2008). However, this poses a challenge as messages need to be carried from the enclosed DNA found in chromosomes to the rest of the cell, which is why there are nuclear pores to allow the passage of water-soluble molecules (Campbell & Reece, 2005). The chromosomes themselves are mostly found tightly-packed as chromatin (except during replication), and this function allows the huge amount of human DNA to be contained within each cell (Campbell & Reece, 2005). The structure of these chromosomes changes throughout the cell cycle, particularly relating to cell division. During mitosis or meiosis (cell division), chromatin structures become more condensed and as a result of this change in structure, transcription stops. D uring mitosis, structures known as microtubules form, anchoring the chromatid to the cell wall. This attachment is what allows the cell to divide, splitting sister chromatids in two to form two haploid daughter cells (Campbell & Reece, 2005).... The ER itself is generally split into two sections, known as the rough endoplasmic reticulum and the smooth. The rough ER plays a part in the synthesis of proteins, which is why its surface is covered in ribosomes involved in the process (Tortora & Derrickson, 2008). The ribosomes themselves are bound to the rough ER on a transitory basis, depending on the signal from the nucleus (Tortora & Derrickson, 2008). In fact, the reason that the rough ER is so-called is because the fact that it is studded with these ribosomes makes it look rough under an electron microscope (Tortora & Derrickson, 2008). The ribosomes themselves only bind to the rough ER as required by the cell, and are associated with the initialization of protein-synthesis for part of a secretory pathway (Tortora & Derrickson, 2008). The smooth ER is involved in the synthesis of lipids required by the cell. It is the increased surface area created by the smooth ER that allows the action of enzymes involved in lipid and ster oid synthesis. Each part of the ER thus has a distinct function in regulating cell behavior. Ribosomes Ribosomes are found within all living cells and are primarily involved in protein synthesis, also known as translation (Tortora & Derrickson, 2008). To do this, the ribosomes link together amino acids (found within the cell) to a template specified from messenger RNA (mRNA). This message, in turn, has come from the DNA code found within the nucleus. There are two subunits which comprise a ribosome; the small unit which reads the mRNA template, and the larger unit which anchors small amino acid units together to create a larger, fully formed protein (Campbell & Reece, 2005).

Free writing journal Essay Example | Topics and Well Written Essays - 250 words - 8

Free writing journal - Essay Example There are many closing doors in the story, a symbolism of Miss Emily’s refusal to adapt to the changes. Miss Emily’s refusal to accept the changing nature and behavior of the society and her environment made her a recluse. This indicates that refusal to accept that our world is changing is a ticket to getting stuck in one place and never moving forward to where we want to be. There are several indications in the story proving Miss Emily’s refusal to become part of the modern world. She didn’t want to put tin numbers on her door and she doesn’t want to have anything to do with the postal service. She didn’t want to accept her debt and she insisted she had no taxes to pay. A Rose for Emily makes us realize that even if we stick to our traditions, there will come a time that our old ways can only be found in books. As people die, traditions die as well, even if we tried so hard to keep things the way it used to be. Since death is inevitable, we cannot assure ourselves that tomorrow, what we’re doing today will still be what the future will be