Radioactive Isotopes Essay

Radioactive Isotopes Essay Pranav Nagrecha Introduction: Radioactive isotopes are kind of isotopes, which have an unstable nuclide and react in assorted ways, they are derived from isotopes that also hold an unstable nucleus but they do not react as radioisotopes do[i]. These factors are categorized by the extra energy which is present in them and which would be used to react and produce some other particle. The reaction, which would result in various emissions of Gama, rays, alpha particles, beta particles. The reaction, which causes these emissions, is called radioactive decay (Radioactivity). The discharge of the radioactive decay is harmful in various ways, only due to the progress in technology now these disadvantages have been converted to advantages and now radioisotopes are used in several facial expressions, which also let in various medical aspects, which would be compensated in the report. The concept of Radioactivity was found by a French physicist, Antoine Henri Becquerel. As most of the discoveries, this also was by a very honest observation and accidental. During the research of phosphorescent materials (The elements which glow in black). Studying Uranium for his research, he kept the uranium on the photographic film, it was a routine for him to hold it under the sunlight for some days and then examine it later. On a cloudy day, he kept the film and the uranium inside. Later on some days he took an observation when he watched the video, the image of the uranium appeared in the film, from his experience, he concluded that it was not because of the sun and it was some reaction which had taken place and lead to this. [ii] After some rigorous testing, he came to know about radiation, which had this reaction. In 1903, he was awarded with a Noble prize for his discovery; Uranium is still the most radioactive element present. As all the reactive isotopes have some spirit, i.e. the time until they crumble, this phenomena is called as ‘Half-Life’. Half-life marks the time in which isotope mass reduces by half. For example, an isotope has a mass of 10 Grams and its half-life is 5 years, Five years later mass of the isotope would be 5 Grams, in the next five years, its mass would be 2.5 Grams and this procedure will decrease exponentially until the mass is Zero. [iii] As isotopes are available in nature, they are sorted into three main categories ‘primordial’ is the former type. Being naturally radioactive the people who exist on this planet release artificial radionuclides. However, the land was formed about 5 billion years ago with various unstable nuclides reacting with each other. The majority of the elements have decayed and formed into various stable elements, there are some who possess a long half-life and yet survive in nature; these isotopes are addressed as â€Å"Primordia l Isotopes†[iv]. The second type of isotopes is called â€Å"Radiogenic Isotopes.† These kinds of isotopes are derived from the format character. The Primordial Isotopes always decay and form radiogenic isotopes. Compared to the format they have a shorter half-life[v] . They hold a parent-daughter pair with the former type; their usage will always depend on the half-life of their parent isotope. The third â€Å"cosmogenic isotopes,† these kinds of isotopes is continuously created in the air. These are organized because of the cosmic rays and various human experiments, which include various reactions of radioactive isotopes; In addition, the nuclear explosions also lead to the formation of cosmogenic isotopes.[vi] Radioactive isotopes have various uses for example it is directly given to clean the lab equipment in which the radioactivity would sterilize the equipment and make it useful for the further experiments, compared to other cleaning methods this method is one of the most clever manner. Radiolabelling is a concept in which the original chemical compound is being altered by using scientific techniques, there are some changed made in the atom, as one or two atoms are put back by radioisotopes. The further study is done until the reactant transformes into a product. The tracers used in various plants and animals help us in studying the organs, cell, and various other aspects of the body. Example if we take a molecule of water and we want to modify it further, we modify one of the hydrogen atoms with a hydrogen-3 atom. This molecule will be a perfect replacement for the original hydrogen atom. Therefore, if we want to trace the atom it is possible, because Tritium atom (Hydrogen-3) is trace able using various radiation detection equipment’s. [vii] As explained above the study of cells become easy using this. Supposedly a scientist has to study the plant and find out how much a particular vitamin is used, he would particularly just modify that vitamin and then feed the plant with it, when the plant uses it up it simply could be discovered by a scanner. This will enable us to know where is a particular vitamin is used; the same can be done on animals. This technique helps in improving and discovering new medications. Carbon Dating is another concept, which is related to the radioactivity of carbon. This concept has helped us to solving the question when did the organism died. The amount of carbon-14 determined can tell us how old the organism is. It works in the following way, when a particular organism dies; there is a specific mass of Carbon 14 to Carbon 12, which is present in some ratio. Comparing both carbons 12 is more stable. Then, when we see an organism we would regulate the amount of carbon 14, because it must have disintegrated at a considerable pace, which is quite preditable. Using the concept of Half Life in this carbons half like is around 5700 Years, which will allow it to stay with the body for 5700 years. [viii] Smoke detectors are very useful and have become mandatory for everyone, have we ever wondered how do they work? Yes, it is because of the Radioisotopes, which make it possible. There is a negligible amount of americium-241, which makes it possible. Americium is an artificially created element. This element always emits a low amount of alpha and beta rays. These are mixed with some oxygen and are given a small amount of charge. The smoke detectors and two electrons in them, thus the voltage applied keeps the electron flow stable and continues. During the time of smoke, when it enters in the chamber the smoke particles are drawn towards the charged ions, this disturbs the current stream in between the two electrodes and therefore activates the alert. Using these substances for makes the detection of smoke faster compared to the older methods. The half-life of the isotope also makes it available for a long time and not is spoilt. [ix] Various radioactive isotopes are also used for security purposes, like detection of various explosives. The compound is as Californium-252 and Cobalt-60 are used for the detection for the explosives. They sense the nitrogen chemical compounds, which are found in major explosives and thus trigger the alarm. They also sense the gama radiations, wich enhance their capabilities.[x] Radioactive metals decay at a considerable rate, while this procedure they produce radiation, which consists energy that can break electrons, which would produce two different charged ions. The radiation also would cause damage to various human tissues. Some radiations are so harmful that they do not yet even possess a remedy. Various health starting from nausea to death are caused by exposure to radiation. They deviate from the quantity of radiation exposed to a special individual. [xi] Conclusion: Radioactive Isotopes have been useful for us in several ways, but this all has been to the jeopardy of our lives. For example: The isotopes of lead are very radioactive and have a direct effect on the brain and nervous system. Radioactive isotopes are the ones, which have yielded a wage hike to various bad and incurable diseases, but then also assisted us to heal them at the same time. The merits and demerits of this factor cannot be likened. [i] R.H. Petrucci, W.S. Harwood and F.G. Herring, General Chemistry (8th ed., Prentice-Hall 2002) [ii] Laboratory Safety and Management: An Introduction to Radioisotopes and Radioactivity. Laboratory Safety and Management: An Introduction to Radioisotopes and Radioactivity. N.p., n.d. Web. 15 Nov. 2014. http://laboratorysafetyandmanagement.blogspot.com/2011/12/introduction-to-radioisotopes-and.html>. [iii] Radioactive Half-Life. Radioactive Half-Life. N.p., n.d. Web. 14 Nov. 2014. http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/halfli.html>. [iv] A. Martin, S. Mead and B.O. Wade. Nuclear Science and Technology. Materials Containing Natural Radionuclides in Enhanced Concentrations (1997): n. pag. Web. 16 Nov. 2014. [v] Gargaud, Muriel, and R. Amils. Encyclopedia of Astrobiology. New York: Springer, 2011. Print. [vi] Beer, JuÃÅ'ˆrg, Ken McCracken, and Rudolf Von Steiger. Cosmogenic Radionuclides as Environmental Tracers. Heidelberg: Springer, 2012. Print. [vii] Science Clarified. Radioactive Tracers. N.p., n.d. Web. 16 Nov. 2014. http://www.scienceclarified.com/Qu-Ro/Radioactive-Tracers.html> [viii] Archaeological Dating. Archaeological Dating. N.p., n.d. Web. 16 Nov. 2014. http://people.chem.duke.edu/~jds/cruise_chem/nuclear/dating.html> [ix] Smoke Detectors and Americium. Smoke Detectors and Americium. N.p., n.d. Web. 14 Nov. 2014. http://www.world-nuclear.org/info/Non-Power-Nuclear-Applications/Radioisotopes/Smoke-Detectors-and-Americium/>. [x] Security Imaging / Security Inspection. Security Imaging Sources, Security Inspection Sources. N.p., n.d. Web. 17 Nov. 2014. http://www.qsa-global.com/sources/applications/security-imaging-inspection.aspx>. [xi] Health Effects. EPA. Environmental Protection Agency, n.d. Web. 14 Nov. 2014. http://www.epa.gov/radiation/understand/health_effects.html>.

Introduction :: Economics

Introduction The aim of this coursework is to use economic theory and explain how supermarkets in my area compete for custom. To provide a fair competition, the four dominant super markets, Sainsbury, Asda, Tesco and Morrisons are chosen. I shall investigate how the ‘big four’ compete for profit against each other in Leicestershire. Research Plan: To prevent complications the class is divided into 4 groups according to their local supermarkets and accessibility. Each student is provided a price check list with a complete list of common items and compares each different supermarket’s product listing. This is the basic plan but comprehensive analysis and research techniques shall be started later on as we familiarize with economic skill and business brain of these clever large firms. Competition Theory: The medium in which a monetary exchange on a basis of business values takes place is known as The Marketing System or The Marketing Industry. Now The Market is such a place where buyers and sellers meet (outdoor/indoor) to exchange goods and services for a monetary value. The Buyer is actually the customer, consumer or the general public. In the U.K. Market is more defined as a place of competition, where survival of the fittest is the only necessary skill. A market can be an opportunity for success or a road to downfall. There are two kinds’ major kinds of businesses in a market that are Product Orientated Businesses and Market Orientated Business. A Market Orientated Business is where the focused product is produced first and then a market place is searched for it. Whereas, A Product Orientated Business is where the market environment and its demands are recognized first and then the product manufactured accordingly. This process of discovering the needs and investigating opportunities in a market is called Market Research. A market orientated business is more likely to have a Marketing Budget as it has performed market research and knows the pros and cons of the marketable product and therefore can predict a financial plan for a specified period of time and value , say a ‘5 years plan of 1million pounds’. The market is risky and tricky place for both buyers and sellers. The sellers want to drain the maximum money out of the public pocket. The seller’s goal is to sell a. Product for the maximum price and the buyer’s is to buy a product for the minimum cost. In order to make their goals not coincide, the sellers try to provide satisfaction for the products they sell. It’s all about the customer needs. For example; if a manufacturer (Asda) decides to enter the toy market, the firm will do a market research and try to predict the choice of

Assessment and identification Essay

Assessment and identification are key elements in education, in particular, special education. Assessing students is essential to knowing where to begin with a student. No matter what the student’s ability is or is being, they all need to be assessed. After the assessments are done and evaluated, a teacher should have a better understanding of what level of performance the students are in the classroom. More than likely not all students will perform equally. The child needs further identification, a teacher needs to initiate a meeting with that diagnostician and get the students started in the Response To Intervention (RTI) process. The child is identified and then an IEP (Individualized Educational Plan) is created at and ARD(Annual Review and Dismissal) meeting. For Emotional or behavioral disturbed students, a BIP (Behavior Intervention Plan) is usually utilized to assist the child and teacher to â€Å"pinpoint† troubled times of the day or particular settings that are not productive for that child and their learning process. Once the ARD meeting has taken place and the modifications have been approved and relayed to the teacher, the learning can begin. Learning can either be successful or not, depending on the approach and strategies used by the teacher. In order for the teacher to accommodate for students with learning disabilities, here she must use differentiated instruction and multilevel assessments. Not all students can learn or perform at the same level. One might suggest strategies or approaches, such as creating a syllabus allowing the students to know what will be covered and assignments that will be expected of them throughout the course. A calendar should accompany the syllabus to assist the visual learners. Technology could be used to present information, and to assess students. This method is especially helpful for a kinesthetic learner or one that has dyslexia. Visual learners could also benefit from the use of technology. Assessments need to be multidimensional with all learners in mind. Of course, the modification and accommodations should align with the student’s IEP. Teachers must know how to create an assessment that is tailored for all learners and remember both the high and low scoring students. In all areas of instruction, whether it be the first time information is being presented or not, the assessment must be given in a way that is effective and efficient. They must always remember to† go as quickly as you can, but as slowly as you must. †

outpouring of personality essays

outpouring of personality essays We are one of a kind! That was made us special... Many things, letting us know how wonderfully and creatively God made you and me. God given assets to distinguish that we are UNIQUE. We have different drives, abilities, and personalities and we cant be treated as the same. We are all born with our own set of strengths and weaknesses, and no magic formula works wonders for all of us. We start with our own set of inborn traits. Some of our qualities are beautiful with strains of gold. Some are blemished with fault lines of gray. Our circumstances, IQ, environment and parental influence can mold our personalities. No wonder we didnt get along! Yes. Each one of us is unique. We started out with a combination of ingredients that made us different from others. We cant imitate someone else... for we are opposite in personalities and interest in life. As we understand ourselves and become true to our own natures, we automatically develop a new acceptance for those people who dont see things our way and who wish to live in a style contrary to our perceptions. And it did happen to me when a thing does not work out in the way I want it to be. It causes us to accept others and ourselves realistically, and it shows us to anticipate problems and handle them before they happen. Circumstances come on my walk exploring life. I cannot tell you how many times I have been really hurt by friends. In each one of us are good and bad we have traits that produces negative responses in others. Quite often the same characteristics can be both a plus and a minus, according to degree, that positives arrived to extremes becomes negative. But even if how much you try just to be pleasing with them and sometimes you already go with the flow, yet it is not enough and still you are being misinterpreted. I know, each one of us has a hero blood wit hin our veins, and how excit...

MEDIA COVERAGE FOR SELF-PUBLISHED WRITER

MEDIA COVERAGE FOR SELF-PUBLISHED WRITER Since newspapers generally have a policy of NOT reviewing self-published books its almost impossible to get a book review in any newspaper. Some papers go so far as to not review anything published A feature story about you is more credible and likely to generate interest than a review of your book. So look at your life and see what you have to offer newspapers readers. Do you collect Santa Claus dolls or trains? Have you turned your living room into a bird sanctuary where 50 birds fly free where your couch used to sit? Do you spend your weekends building tree houses for neighborhood kids? I wrote feature stories on all these people. When you can get a reporter interested in you running your 10th marathon, or heading up the drive to distribute sleeping bags to the homeless its very easy to work in, Oh, and I just published a book. If you have something in your life to pitch to a reporter OTHER than your book, youre almost guaranteed to be able to talk about writing the book in the article. Your self-published book may drive interest in something the public wants to know about. For instance, a parent who self-publishes a book on how to get through the diagnosis, treatment and outcome of her childs cancer to raise money for cancer research or her child, is likely to get a reporters attention. So is the coach who writes a book on how to introduce your child to sports. If you have a recognized expertise, most reporters will find a story in that. Have you written a book on the history of your town and had to go on some amazing road trips, or dig into old courthouse documents, or interview veterans in a near Are you related to someone famous who is mentioned in the book? You dont have to be Oprahs long lost sister, but if the towns local celebrity is related to you, then good for you! If youre a famous coach, teacher or political figure who self-publishes a book, chances are youll get the attention of any small town paper. Think holidays! If youve written a book on Thanksgiving traditions, or how to wrap Christmas gifts, or anything related to the big holidays- Veterans Day/Memorial Day, Thanksgiving or Christmas, Easter etc., MOST small to medium newspapers will write a story to tie the holiday to a local person. Dont stop at your daily paper. Almost all cities have alternative papers, and rural areas have weekly papers. If you live in a bedroom community then chances are you have a weekly paper whod love to write about your book. But read several issues of the paper FIRST, before you write the editor. Try to see if your book has relevance for the readership. There are all kinds of weekly papers for seniors, grandparents, sports enthusiasts, fishermen and parents. Try to find a paper (most are free and distributed at libraries, grocery stores and shopping centers) that caters to people who would be interested in your book. Dont try to get a grandparenting magazine to review your Sci-fi thriller. Do get a parenting magazine to look at your How I Learned to Get Offline and Love the Playground book on parenting in a high tech society. Dont forget bloggers! Many of the larger newspapers read local blogs and will pick up on any content that generates online buzz. The trick is to never stop marketing! You can do it!

Human immunodeficiency virus and acquired immunodeficiency syndrome Essay

Human immunodeficiency virus and acquired immunodeficiency syndrome - Essay Example Global statistic shows that approximately 33.4 million of people are currently live with AIDS/HIV among them are 3.3 million of children. Also, approximately 97% of all patients that have AIDS/HIV are from low and middle income countries. The first cases of AIDS/HIV were detected in 1981. Since that time HIV lead to 25 million deaths all over the world. Therefore AIDS/HIV is the most important health challenge nowadays. HIV related to the lentiviruses from Retroviridae family. This genus of viruses mainly characterizes by their ability to transmit quite huge amount of viral RNA into the DNA of the host cell. Also they can infect non-dividing cells. The main targets for HIV are cells of the immune system such as macrophages that are white blood cells and can protect our organism through phagocytosis from outer dangerous substances; dendritic cells that involve in process of antigen production and presenting on the surface of the T cells; T helper cells that play important role in adaptive immune system and immune responses. (Mayo Clinic,2014) HIV damages CD4+ cells that related to the T helper cells and the amount of such cells rapidly decreased. When level of CD4+ cells is lower than a minimal level cell-mediated immunity stops work properly and does not release phagocytes and cytokines as a response to an antigen. This is quite dangerous process that leads to the extremely high susceptibility of organism to opportunistic infections that are not that dangerous and usually do not cause disease in people with a healthy immune system. (Mayo Clinic,2014)

Competition in School Assignment Example | Topics and Well Written Essays - 500 words

Competition in School - Assignment Example Some feel competition helps each person to hone their creative skills. For students who study in design schools, the nurturing of individual creativity is important because they must continually innovate. When competition is involved, students take risks they might not otherwise take to create something unique enough to be noteworthy. It means students summon their most creative talent. Many students like Elizabeth Young, a former student of the University of California, argues students learn more about their natural talent in competitive environment. It is considered as the "whetstone of talent." Competition also helps the students to work as teams and create success together. Competition affects the general welfare of society. Competition leads to jealousy and envy among people. It is true that competition may be helpful in giving people the drive to design better projects, but this is not really where the story ends. People may actually turn against each other personally due to professional competition. Educator Mary Pat Lynch shares that in such harsh competition winning becomes the focus instead of learning. All students care about is the grade and no effort is made to actually understand the ideas involved.