Elements in the Human Body and What They Do

Elements in the Human Body and What They Do There are several ways to consider the composition of the human body, including the elements, type of molecule, or type of cells.  Most of the human body is made up of water, H2O, with cells consisting of 65-90% water by weight. Therefore, it isnt surprising that most of a human bodys mass is oxygen. Carbon, the basic unit for organic molecules, comes in second. 99% of the mass of the human body is made up of just six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Oxygen (O) - 65% - Oxygen together with hydrogen form water, which is the primary solvent found in the body and is used to regulate temperature and osmotic pressure. Oxygen is found in many key organic compounds.Carbon (C) - 18% - Carbon has four bonding sites for other atoms, which makes it the key atom for organic chemistry. Carbon chains are used to build carbohydrates, fats, nucleic acids, and proteins. Breaking bonds with carbon is an energy source.Hydrogen (H) - 10% - Hydrogen is found in water and in all organic molecules.Nitrogen (N) - 3% - Nitrogen is found in proteins and in the nucleic acids that make up the genetic code.Calcium (Ca) - 1.5% - Calcium is the most abundant mineral in the body. Its used as a structural material in bones, but it is essential for protein regulation and muscle contraction.Phosphorus (P) - 1.0% - Phosphorus is found in the molecule ATP, which is the primary energy carrier in cells. Its also found in bone.Potassium (K) - 0.35% - Potassium is an im portant electrolyte. Its used to transmit nerve impulses and heartbeat regulation. Sulfur (S) - 0.25% - Two amino acids include sulfur. The bonds sulfur forms help give proteins the shape they need to perform their functions.Sodium (Na) - 0.15% - Sodium is an important electrolyte. Like potassium, it is used for nerve signaling. Sodium is one of the electrolytes that helps regulate the amount of water in the body.Chlorine (Cl) - 0.15% -  Chlorine is an important negatively-charged ion (anion) used to maintain fluid balance.Magnesium (Mg) - 0.05% - Magnesium is involved in over 300 metabolic reactions. Its used to build the structure of muscles and bones and is an important cofactor in enzymatic reactions.Iron (Fe) - 0.006% - Iron is found in hemoglobin, the molecule responsible for oxygen transport in red blood cells.Copper (Cu), Zinc (Zn), Selenium (Se), Molybdenum (Mo), Fluorine (F), Iodine (I), Manganese (Mn), Cobalt (Co) - total less than 0.70%Lithium (Li), Strontium (Sr), Aluminum (Al), Silicon (Si), Lead (Pb), Vanadium (V), Arsenic (As), Bromine (Br) - pres ent in trace amounts Many other elements may be found in extremely small quantities. For example, the human body often contains trace amounts of thorium, uranium, samarium, tungsten, beryllium, and radium. Trace elements considered essential in humans include zinc, iodine, possibly silicon, probably boron, selenium, probably nickel, chromium, manganese, lithium, possibly arsenic, molybdenum, cobalt, and possibly vanadium. Not all of the elements found within the body are essential for life. Some are considered contaminants that appear to do no harm, but serve no known function. Examples include cesium and titanium. Others are actively toxic, including mercury, cadmium, and the radioactive elements. Arsenic is considered to be toxic to humans, but serves a function in other mammals (goats, rats, hamsters) in trace amounts. Aluminum is interesting because it is the third most common element in the Earths crust, yet serves no known function in living cells. While fluorine is used by plants to produce protective toxins, it serves no essential biological role in human beings. You may also wish to view the  elemental composition of an average human body  by mass. Sources Chang, Raymond (2007). Chemistry, 9th Edition. McGraw-Hill. ISBN 0-07-110595-6.Emsley, John (2011). Natures Building Blocks: An A-Z Guide to the Elements. OUP Oxford. p. 83. ISBN 978-0-19-960563-7.Frausto Da Silva, J. J. R; Williams, R. J. P (2001-08-16). The Biological Chemistry of the Elements: The Inorganic Chemistry of Life. ISBN 9780198508489.H. A., V. W. Rodwell; P. A. Mayes, Review of Physiological Chemistry, 16th ed., Lange Medical Publications, Los Altos, California 1977.Zumdahl, Steven S. and Susan A. (2000). Chemistry, 5th Edition. Houghton Mifflin Company. p. 894. ISBN 0-395-98581-1. Elements in the Human Body and What They Do

English Legal System, Coursework Essay Example | Topics and Well Written Essays - 1750 words

English Legal System, Coursework - Essay Example The main feature of the English legal system is that it is living and constantly evolving to work in the future as well as it did in the past1. Thus the single most unique feature of the English legal system is its inheritance from common law2. Most of the characteristics commonly linked to English law and its management of righteousness are traceable to the early on growth in Western Europe of the civil and common law customs. According to Goodman (1995), "several characteristic consequences flow from the fact that law did not emanate from one centralised authority such as papacy, king or parliament. The odd growth of the common law in England developed it appears from a coincidence resemblance of the implementation after the Norman take-over by consecutive monarchs of native customs as the foundation for the governance of justice. Conflict assessment, chiefly concerning land title, was a key function for justice. Judges were nominated by the king to tour the country and decide controversies, aided by a local adjudicator included by the Normans into operational royal courts. The trial accepted a key role in the settlement of disputes. Wilson (1995) states that "Everyone takes for granted the fact that law and legal systems differ in different countries. But it is also true of legal scholarship. One reason for this is the different responsibilities legal scholars have in different countries for the maintenance and development of the local law...One result is that legal scholars in different countries may have different agendas and this may affect the subject matter, scope and even the form and style of the local legal scholarship." (Source: http://www.chriswallis.com/uni/cnlaw231l01.pdf accessed on November 5 2009). To bring about a faith to the law the courts followed the principle of stare Decisis.3 This is referred to as the doctrine of precedent. The courts are divided into two (IALS Conference, Learning from Each Other: Enriching the Law School Curriculum in an Interrelated World). They are: i. Superior courts; ii. Inferior courts. The House of Lords is the superior court but it is a UK court since it practices appellate authority for all the three legal systems.4 The Superior Courts are known as the Supreme Court from November 2009. The Supreme Court consists of the High Court, the Crown Court and the Court of Appeal (IALS Conference, Learning from Each Other: Enriching the Law School Curriculum in an Interrelated World). The doctrine of precedent's role in the English legal system is very important since common law is a vital basis of law in the English legal system. This is opposite to the European legal system as it is founded on legal examples and possibilities. A lot of stages of study have to be conducted under a common law jurisdiction so that it can be understood as to what the law is. The facts of the law have to be understood first and then any relevant statutes or legal cases have to be located. Finally the principles 3. Meaning "let the decision stand". 4. However the jurisdiction is not universal. For example, whilst there is a right of appeal to the House of Lords against civil actions in Scotland no such right exists for criminal matters. and the decisions used in the case are used for the future

Strategic Planning Essay Example | Topics and Well Written Essays - 250 words - 1

Strategic Planning - Essay Example External environment must be analyzed by the organization to determine how n organization can survive in the midst of the competitors. Implementation of strategy- strategy implementation entails the act of putting strategy into practice. In addition, the process involves steps development, methods and strategy execution procedure. The process also includes determination of which strategy to come first. Prioritization of strategies should be based on the seriousness of all issues underlying. Strategy evaluation- this element entails the examination of strategy implementation as well as the strategy outcome. Evaluation includes the process of finding out whether the deadlines have been met, whether the process used in implementation steps and process are working the way they should. Strategic management is a crucial part of organizational business strategies. For any organization to successfully survive in a competitive business environment, it has to gather the right information so that the organization can have a competitive advantage to compete against its competitors. Organizations survival deeply depends on how it outshines its competitors. If the competitors outperform the organization then, it fails. A good strategic management is, therefore, vital for an organization to strengthen its operations in the market. Business models offer a description of how an organization structure is set to maximize the profits. On the other hand, business strategy is used to give a description of how organization engages its competitors. A company like amazon and Facebook has been able to beat their competitors through development of new strategies. Facebook has been successful in increasing its revenue through virtual property owner

Competitiveness between both Developing and Developed Nations Research Paper

Competitiveness between both Developing and Developed Nations - Research Paper Example Despite the forces of globalisation, national advantage and locality are among the key factors that determine competitiveness. This paper looks at the evidence from trans-national corporations and specific industries in various nations. Nations like China, Japan, US, UK and Germany. Research shows that global competition has really gone high tech. The competition is very stiff. (Porter, 1998) It is very clear that the factors that determine the competitiveness of nations are quite numerous. When public finances in a nation are mismanaged, and inflation occurs, this highly affects the business environment a great deal. This results in the undermining of incentives that are necessary for investment in the business sector. Other factors include having a quality judicial system within a nation. Training and education within a nation are among the factors that drive competitiveness. Nations that ensure that their labour force is trained and has access to the latest technologies and new kn owledge are normally very competitive. (Peng, 2006) Just as the factors are numerous, they matter quite differently in different nations. This also depends on the nation's stage of development. According to the Global Competitiveness Index (GCI), there are various driving factors that influence the competitiveness in a nation.  The world economic forum has over the years measured the competitiveness of nations in an international environment. The Growth competitiveness index is used to assess the competitiveness of nations. Research reveals that Poland still remains the worst performing nations among European Union nations. It actually ranks forty-eight behind Greece that ranks forty-seven. The Czech Republic ranks twenty-nine while Estonia ranks twenty-five. Poland has got weaknesses in its labour market that is quite rigid. Research shows that unemployment in this nation.

Vehicle Vibration Analysis

Vehicle Vibration Analysis It is known that vibration levels depend on various parameters, such as type of vehicle suspension, inflation pressure and condition of the tires, the speed of vehicle, road condition, vehicle load, etc. As this simulation is held on a 4-post shaker and tested vehicle is given, some of the factors should be ignored. Hence two factors are selected, tire inflation pressure and vehicle load, as test variables. 1. Effect of tire inflation pressure: This project will detect the dynamic performance of pickup truck with tire pressure at 50%, 100% and 150% of rated inflation. This variable is considered base on the principle of how the road excitation is damped all the way from tire-ground interfaces to the chassis. Tires are the most important parts of a car. The damping occurs at two points: the car suspension, which consists of a combination of bushes and the shock absorber with its different types depending on the car model, and the tires. This shock absorber is connected in parallel with a helical spring coil. In addition to shock absorbers and springs, the tires damp the road excitations. Although the damping effect of tires is small when compared to that of that of the shock absorbers and springs, this damping effect cannot be ignored. Under rough road excitation, tire sidewall and tire stiffness affect the dampening. Varying tire pressure will have a great impact on the damping coefficient of the tires. At overinflation con dition, tires tend to be stiff and transmit vibrations directly to the shock absorbers and other suspension components, and for tires themselves, the tread wear is severe along the center due to bulging of the tire structure at a high pressure. Since decreasing the pressure will decrease the stiffness of the tires, the effect will be greater damping before transmitting the excitation to the suspension components. But reducing it after a certain threshold will reduce the drivers car control and pose a danger to him and his surroundings. Driving with underinflated tires will cause uneven tread wear either, potentially lead to fatigue breakdown of the tires internal structure resulting in tread separation or other structural failure and also conversely degrade the car performance by increasing vibrations. Hence different tire inflation rate should be applied during testing and observe the difference of the performance of the unsprung system. 2. Effect of Vehicle Load It has been shown that the dynamics of a lightweight vehicle are more sensitive to payload parametric variations, i.e., passengers or freight loads, than a conventional vehicle. For example, a harsh turning may lead to rollover much more easily, or the maximal acceleration/deceleration is significantly reduced, when a large amount of payloads is placed on a lightweight vehicle. All these deviations in lightweight vehicle dynamic responses, even if sometimes trivial, can mean life or death, particularly under some critical maneuvers and challenging driving conditions. Fortunately, the existing numerous advanced parameter-adaptive vehicle control systems, such as adaptive traction/braking control, adaptive steering control and adaptive roll/lateral stability control, can partly relieve the aforementioned problems. However, these controllers originally were not targeted for lightweight vehicles and did not explicitly consider the vehicle payload variations, and more importantly, they se ldom generated the information on the unknown parameters. Since payload may count for a considerable part for a lightweight vehicle, the knowledge of the actual payload parameter values can greatly benefit the ride dynamics analyzation in lightweight vehicles. It is concluded by previous research that, for active suspensions, both ride and handling can be improved by reducing the vehicle load. In particular, when the total vehicle mass is kept constant, every 10% reduction in vehicle load contributes to a circa 6% reduction in r.m.s. sprung mass acceleration for the same level of wheel-hop. For active suspension vehicles, this provides a clearer picture of the unsprung load effect on vehicle ride dynamics.

Race, Class and Gender Essay -- Social Issues, Homosexuals

Franklin (1987) also alluded that patriarchy did not serve black men; the notion of black men being domineering over groups is questionable. Besides, Pleck (2008) claimed that the male heterosexual-homosexual dichotomy is used as the main symbolic tool defining the rankings of masculinity. Highlighting racial politics, it would be interesting to have a study focusing on the power relations between white gay men and black heterosexual men. This is premised on the stance that the racial hierarchy, regardless of its dismissal, seems to continue to characterise socio-economic relations. stated that race remains a factor because it is deeply embedded within the subconscious, a discussion on this shall follow suit. McClintock (1992: 5) declared that â€Å"race, class and gender are not distinct realms of experience existing in splendid isolation from each other. Rather they come into existence in and through relations to each other.† Moreover, colonialism was not experienced in the same manner due to the political nuances that transpired. For a purpose yet to be illustrated, the historicity of colonial experiences shall be sidelined. Colonial justifications were premised upon pseudo science about race and the application of the Darwinist rhetoric. McClintock (1992) cited that social evolutionists applied the allegory of a tree as an indication of subordination and hierarchy of racial groups. There were concepts such as the family of man whereby a racialized and cultural hierarchy relegated black people to the bottom of the chain within a gendered order. Economically, white men came first, and then white women; black men and women followed respectively. Thus black men, although observation and living within an imposed binary const... ...the assumption of equality have influenced gender relations. Moving back to her reflection of heroic masculinity, Unterhalter (2000) inferred from the autobiographies she analysed that adventure, danger, daring in thought or deed and loyalty were key parts of masculinity. This notion of loyalty can be detected in Malema’s willingness to â€Å"kill for Zuma† utterance. However, what other explanations are there for the then loyal support of Zuma despite. A possible reason, which may be viewed as interlocking with the gender analysis, is Chipkin’s work titled ‘The Sublime Object of Blackness’. Chipkin (2002), in his endeavour to identify the discursive mechanism relating to the notion of blackness, showed how aspects of the subjective characterization of blackness under the black struggle against apartheid have permeated into post-apartheid definitions of blackness.

Explain how you would perform the role of Ismene in her first appearance in the play to engage the sympathy of the audience Essay

In order to engage sympathy I would perform Ismene as a 30 – 40 year old woman (at least 10 years older than Antigone) who is quite business-like and appears to the audience as if she can handle herself. The first signs of beauty have just faded from her face and she has developed a little fat around her stomach. The play would be set in a fictional place and as such there would be no set era of human history, because of this I would have Ismene dressed in an unbecoming suit, which looks very masculine and only has stock colours of black and white. In scene one I would have entered first, looking quite purposeful, seemingly prepared for whatever was to come. Then I would stand center stage for about thirty seconds, gradually getting more and more agitated, constantly looking at a pocket watch in my left pocket. Then there would be a noise heard in the distance and I would hurry over to downstage right and hide behind one of the pillars so that the audience would be able to see me but anyone who entered would not. At this point Antigone would flounce in from upstage right. Antigone would be around the age of 18, dressed also in a suit, however her suit would be much more feminine and vibrant colours, she would have a skirt which was hitched up too high and her jacket would be open exposing a top which exposed slightly too much skin. She would have blood red lipstick on and far too much makeup on her face. After hearing Antigone enter I would take a moment to prepare and try to calm myself. I would then reveal myself from behind the column but I would remain nearer to the column than Antigone herself. There would be a few moments of silence where we just looked at each other and then Antigone would speak. In her first line Antigone’s tone would be quite calm and composed. However I would be trying not to make eye contact with her as she was talking about an aspect of our past, which neither of us was proud of. However Antigone would add a hint of venom on the word â€Å"care† in the final sentence of her line at which point I would finally look her in the eye, almost defiantly and take a moment to consider what I would say next. Throughout the scene I would be trying to convince Antigone that what she was doing was going to get her killed and that even though what she was doing was morally right it was not worth her loosing her life over. Also I would be trying to bond with Antigone and trying to keep us both together. While Antigone would constantly keep rejecting me, or even attempting to make me suffer. For example in the speech on page 5 I would emphasize every time it says â€Å"we† in an attempt to show Antigone that we are on the same side. In reply to this Antigone would just brush this off and put even more emphasis on saying â€Å"I† Her tone would also seem very righteous and full of herself. There are many lines that I would use to gain the sympathy of the audience, for example. When Antigone says, â€Å"Yes I want to frighten you† I would look taken aback and hurt and shocked all at once, mirroring how the audience would have reacted to such an unexpected line. Also when I say, â€Å"we are ruled by the more powerful† I would say that as if it was fact and there was nothing we could do to help it, I would also at that point seem very helpless and exposed. At this point Antigone would see this and would drive the knife in deeper saying her next line with such venom that it leaves me speechless. Throughout the scene I would be getting more and more desperate, almost pleading with Antigone at some points. While Antigone would be almost reveling in the fact that she made me feel so terrible. And finally on page seven I would compose myself, stand up straight, look Antigone straight in the eyes and say my final line before finally allowing a single tear to roll down my face as I watch Antigone storm off downstage right and I would exit upstage left.