Integrated Reporting Framework Essay Example | Topics and Well Written Essays - 1000 words

Integrated Reporting Framework - Essay Example However, it was not until 1999 that the UK developed a framework which it described as – ‘Statement of Principles for Financial Reporting’. Both frameworks were based on work done in US, Canada and some other countries (Dyson 2007). Before that time the bases for financial reporting were various rules and custom and standards which were mainly ‘fire-fighting exercises’ (Dyson 200?). The USA, however, was much earlier in developing a conceptual framework in the 1970’s. This framework was also developed out of a number of crises over the years which led to the creation of the Securities and Exchange Commission in the United States in 1934 under whose charge the FASB falls. Subsequently, there have been additional crisis in the United States especially that which led to the Sarbanes Oxley Act 2002. This Act has laid down certain requirements for companies listed on the stock exchange. All these have one objective – the protection of stakeho lders, while minimising the differences in reporting by companies. The IFRS framework deals with the objectives of financial statements, the qualitative characteristics that determine the usefulness of these statements, the definition, recognition and measurement of the elements from which they are constructed, and the concepts of capital and capital maintenance (BPP 2009, p. 36). They form a common basis on which financial statements are repared, thus creating a basis for discussion. These frameworks have provided guidelines in relation to disclosure of information, measurement, recognition and presentation of financial statement components. This means that company executives have to abide by these guidelines if they want their auditors (assurance providers) to indicate that their financial statements show as true and fair view. This has helped to constrain the freedom of company executives. Harmonisation and convergence projects There have been frequent calls for harmonisation and this has borne some fruit with over 100 countries accepting the International Financial Reporting Standards (IFRS) with additional countries such as Canada being one of the most recent adoptees (Sungard 2011). According to PricewaterhouseCoopers (2011, p. 3) as a result of mergers and acquisitions through business dealings with non-US customers and vendors IFRS continue to affect US companies. This has led to the convergence project for a conceptual framework which is a joint project between the International Accounting Standards Board (IASB) the preparers of IFRS and Financial Accounting Standards Board (FASB) the preparers of US GAAP. The objective of the project is to develop an improved conceptual framework as a basis for developing accounting standards in the future (Financial Accounting Standards Board n.d.). All these are aimed at making financial statements that have been produced in different countries more comparable. Additionally, investors will feel more secured and con fident in the information provided in the statements. The Need for Integrated Reporting The frameworks provided by various accounting bodies though undergoing continuous revision have not been able to keep up with the pace of changes in the global environment. Investors and other stakeholders find themselves being short changed by insufficient disclosure, an inability to link the figures provided in the

International trade Essay Example | Topics and Well Written Essays - 2500 words - 1

International trade - Essay Example China is fast approaching the value of the United States in terms of exports and is an important destination for imports. India and the Asean countries have also shown export growth in these years. India’s export growth is fast growing that is already similar to China. In the same way, Asean countries take action to China’s competition as its merchandise exports particularly in manufacturing grew by 18% in 2006. Likewise, European’s growth is inspired by the rising business and consumer confidence. European Union is the second world biggest exporter and importer of goods and services. Second, the strong economy is boosted by demand for commodities needed for industrial manufacturing and infrastructure development, such as metals and oils and is highest in 2007 that displayed the highest price movement (Chart 4) Chart 4: Export prices of selected primary products, 2005-2007 Annual % change a Comprising coffee, cocoa beans and tea. Source: IMF, International Financ ial Statistics. Source: World Trade Organization, 2008 Third, the strong regional developments have been accompanied by strong growths in merchandise trade as Table 1 would show. The strong economy of the emerging countries is accompanied by strong exports and imports. Fourth, export growth receives continued support from the world economy. As table 1 below shows, the combined merchandise exports of major economies integrate into the strong export growth of the world of 6.5% in 2005, 8.5% in 2006 followed by a decline of 5.5% in 2007. In 2007, effect of recession is starting to appear as trading slows down in most of the countries, with exception of the emerging economies that displayed its strength beyond crisis. We have seen China, Asia and India emerged as strong exporters. Table 1: GDP and merchandise trade by region, 2005-07 Annual % change at constant prices    GDP Exports Imports    2005 2006 2007 2005 2006 2007 2005 2006 2007 World 3.3 3.7 3.4 6.5 8.5 5.5 6.5 8.0 5.5 Nor th America 3.1 3.0 2.3 6.0 8.5 5.5 6.5 6.0 2.5 United States 3.1 2.9 2.2 7.0 10.5 7.0 5.5 5.5 1.0 South and Central America a 5.6 6.0 6.3 8.0 4.0 5.0 14.0 15.0 20.0 Europe 1.9 2.9 2.8 4.0 7.5 3.5 4.5 7.5 3.5 European Union (27) 1.8 3.0 2.7 4.5 7.5 3.0 4.0 7.0 3.0 Commonwealth of Independent States (CIS) 6.7 7.5 8.4 3.5 6.0 6.0 18.0 21.5 18.0 Africa and Middle East 5.6 5.5 5.5 4.5 1.5 0.5 14.5 6.5 12.5 Asia 4.2 4.7 4.7 11.0 13.0 11.5 8.0 8.5 8.5 China 10.4 11.1 11.4 25.0 22.0 19.5 11.5 16.5 13.5 Japan b 1.9 2.4 2.1 5.0 10.0 9.0 2.5 2.5 1.0 India 9.0 9.7 9.1 21.5 11.0 10.5 28.5 9.5 13.0 Newly industrialized economies (4) c 4.9 5.5 5.6 8.0 12.5 8.5 5.0 8.5 7.0 a Includes the Caribbean. b Trade volume data are derived from customs values deflated by standard unit values and an adjusted price index for electronic goods. c Hong Kong, China; Republic of Korea; Singapore and Chinese Taipei. Source: WTO Secretariat. 1.2 Distinction between tariff and quota and why tariffs are preferable to q uotas (i.e. quantitative restrictions) as a method of controlling imports Tariff and

Intro to Aircraft Systems Essay Example for Free

Intro to Aircraft Systems Essay All single rotor helicopters need some way to counteract the torque that is created by the rotor blades spinning around the mast. The most common anti-torque system used on helicopters is the Tail Rotor System. The Tail Rotor System is a relatively small rotor and transmission attached at the end of the tail boom that is driven from a shaft coming from the main engine and transmission (ASA, Helicopter Flying Handbook 1-5). Another anti-thrust system used less frequently is the Fenestron system. It is driven in a similar way to the standard tail rotor system but instead of two rotor blades at the end of the boom there is a series of rotating blades that are enclosed in a protective shroud, thus adding a degree in safety by protecting the tail rotor blades from ground contact (ASA, Helicopter Flying Handbook 4-7). The anti-torque system I want to discuss in greater detail is called the â€Å"NOTAR† system. The NOTAR system is dramatically different in design as it does not require another rotor at the end of the tail boom to create thrust and in losing that tail rotor this system has a number of advantages, added safety being one of the crucial benefits. The NOTAR system uses the natural characteristics of aerodynamics along with thrust from pressurized air exiting the tail boom to provide the thrust needed to counter the torque being produced by the main rotor (ASA, Helicopter Flying Handbook 4-7). It does this using the following components that are built into the design of the helicopter: air intake, fan, tail boom the can contain and control airflow, tail thruster cone, and two vertical stabilizers at the end of the tail boom. The first component of this system is the air intake, or a large opening on top of the rear fuselage. This intake is covered by a fine mesh screen designed to keep foreign objects from getting sucked into the system (Wagtendonk 190). The intake pulls air into the second component of this system: an enclosed variable-pitch composite blade fan. This fan’s purpose is to create a low pressure and high volume of ambient air that is sent into the tail boom, pressurizing it in the process. The fan blades are variable-pitch meaning their pitch, or pitch angle, can be increased or decreased creating more or less volume of air that is being introduced into the tail boom (Wagtendonk 190). The fan is located just behind the main transmission where the tail boom connects to the fuselage and is driven directly by the main rotor gearbox, this ensures that the fan is always providing directional control including when in auto rotation (Wagtendonk 190). The tail boom is the third and very crucial component of the NOTAR system. It looks similar to a standard tail boom but has a bigger circumference, is made from composite material and is completely hollow on the inside. The tail boom is designed with two parallel slots that run the length of the right side that allow the fan air (low pressure) to flow out and downwards (Wagtendonk 190). This movement of airflow energizes, or speeds up, the boundary layer of downwash flow that is created by the main rotor. This is called the Coanda effect (Wagtendonk 190). This essentially makes the tail boom a wing in relationship to the airflow created by the main rotor- low pressure on the right side and high pressure on the left side creating lift/thrust in the opposite direction of the torque from the main rotor. The Coanda effect is most effective when the helicopter is at a hover and can produce up to 60% of the needed anti-torque force. When forward speed is gained or in windy conditions the main rotor downwash begins to angle away from the tail boom reducing the Coanda effect (ASA Helicopter Flying Handbook 4-7). At the end of the tail boom we have another component to this system that provides the remaining force needed to produce enough anti-torque: the rotating direct jet thruster cone. The direct jet thruster is basically a nozzle at the end of the tail boom that directs the flow of the pressurized fan driven air. When the airflow reaches the nozzle, it first hits baffles located inside the rotating nozzle, which helps direct the airflow out the rectangular opening on the cone (Wagtendonk 191). The pilot can control the orientation of the cone by making pedal inputs- pressing the left pedal points the opening on the cone to the left side creating more anti-torque while right pedal turns the cone to the right reducing the anti-torque thrust (Wagtendonk 191). The final component to the NOTAR system is the twin vertical stabilizers that are attached on each end of the horizontal stabilizer. These stabilizers provide most of the anti-torque once the helicopter is in forward flight (ASA Helicopter Flying Handbook 4-7). Unlike the standard helicopter vertical stabilizer the left stabilizer actually moves and acts like a rudder, moving in unison with the rotation of the direct jet thruster (Wagtendonk 192). The right stabilizer is more like a â€Å"yaw damper† and is hooked up to a Yaw Stability Augmentation System (YSAS) (Stephens, â€Å"NOTAR: More Than What It Appears To Be†). The YSAS consists of a small electro-mechanical actuator that moves the right stabilizer based off of information coming from a yaw rate gyro and lateral accelerometer that is installed in the cockpit (Stephens, NOTAR: More Than What It Appears To Be†). There are some distinct advantages of the NOTAR system over the more conventional tail rotor and Fenestron anti-torque systems. One obvious advantage when comparing the NOTAR system to any other helicopter in flight is the amount of noise level reduced due to the lack of another added rotor (Abdollahi 6). In fact the MD 900 (which uses NOTAR) boasts the lowest noise levels of comparable helicopters (Abdollahi 6). Another advantage the NOTAR system has over the conventional tail rotor design is added safety. With no tail rotor, the NOTAR system eliminates the hazards of tail rotor strike, foreign object damage, and eliminates hazards involving people walking into the tail rotor (Wagtendonk 189). Also, the ability to control the heading in crosswind conditions is improved, and tail rotor blade stalls are eliminated (Wagtendonk 189). Though the NOTAR system is not widely used in the helicopter industry it is proven to be a highly effective, safer, anti-torque system. Its simple design using the natural characteristics of aerodynamics adds to its advantages, as does the additional safely gained regarding passengers and the pilot by eliminating the need for a tail rotor.

Catalytic Reduction of Hydrazine to Ammonia

Catalytic Reduction of Hydrazine to Ammonia Ruvanthi Kularatne Catalytic Reduction of Hydrazine to Ammonia: The Site of Reduction in Nitrogenase Abstract The conversion of N2 to NH3 is done mainly via anaerobic bacteria. The enzyme nitrogenase, which can be found in these anaerobic bacteria, is responsible for this conversion. Much research has been conducted in order to identify the structure of the enzyme, the mechanism for the conversion, and the site of reduction. Hydrazine is a substrate and an intermediate of the nitrogenase enzyme. Hence, the reduction of hydrazine to ammonia is used to mimic the late stages of the biological nitrogen fixation. Here the main focus is to identify the metal atom to which the hydrazine molecule binds. In order to identify the binding site of N2 is Fe, a tris(thiolato)phosphine ligand, P(C6H3-3-Me3Si-2-S)33−(PS3†³), is used as the platform to obtain the iron(II) complex, [P(Ph)4][Fe(PS3†³)(CH3CN)]. Also, a substrate-bound and product-bound adducts, [N-(Bu)4][Fe(PS3†³)(N2H4)] and [N(C2H5)4][Fe(PS3†³)(NH3)] respectively, are synthesized. To determine whether the binding site is the V in vanadium nitrogenase, [P(Ph)4][V(PS3†²Ã¢â‚¬ ²)(Cl)] and [P(Ph)4][V(PS3†²)(Cl)] [PS3†² = P(C6H3-5-Me-2-S)33-] are synthesized. Introduction Nitrogen is an essential element in all living organisms. It is a major element in nucleotides and in amino acids which ultimately forms DNA and RNA, and proteins respectively. These are the building blocks which make up the nuclei in living organisms. The major source of nitrogen is atmospheric N2. It is a stable molecule and it has to be converted to a form which can be utilized by organisms. The natural way of nitrogen fixation is by lightening and by anaerobic bacteria, the latter being the most prominent. About 25 % is fixed by the industrial Haber process, which occurs at high temperatures and pressure, whereas the biological processes occur at ambient conditions1. During the process, N2 is converted to NH3, which is a more usable form than N2. Nitrogen fixation by anaerobic bacteria is catalyzed by the enzyme nitrogenase. The enzyme is composed of two protein subunits, a MoFe protein and a Fe protein. Studies reveal that the substrate binding and activation in the enzyme occurs at a Mo/Fe/S center. The structure of this molybdenum nitrogenase has been characterized by X-ray crystallography.2 The Fe protein has two bound MgATP molecules. During the reduction of N2, an electron from this Fe protein is transferred to the MoFe protein, which is associated with the hydrolysis of the two MgATP molecules.3 There are reports of three forms of nitrogenase with Mo, Fe and V.4 The Fe and the V are also known as the â€Å"alternative† forms of nitrogenase1. The first has a V in place of Mo and the other is an â€Å"all-Fe† nitrogenase1. Although the structures have been identified, the exact mechanism of the catalysis of N2 by the enzyme is still not fully understood. As a result, research is being conducted to obtain the mechanistic information of nitrogenase. Large number of coordination compounds has been proposed as possible structural or functional models for nitrogenase. Mononuclear and binuclear transition metal complexes and polynuclear Fe/Mo/S aggregates are among the suggested compounds. Hydrazine is a substrate and an intermediate of the nitrogenase enzyme. Hence, the reduction of hydrazine to ammonia is used to mimic the late stages of the biological nitrogen fixation. For the reduction of hydrazine, a proton source and an electron source is necessary (eq 1).1 N2H4 + 2e + 2H+ à ¯Ã¢â‚¬Å¡Ã‚ ® 2NH3(1) Studies through hydrazine have suggested that the site of binding of N2 is at Fe in the MoFe-cofactor.5 However, some research also shows that the reduction site is at Mo in the MoFe-cofactor1,6 or in a VII state in vanadium nitrogenase.7 Based on electron density maps and X-ray crystallography, it has been found that the Fe/Mo/S cofactor has an elongated MoFe7S9 cluster which is composed of MoFe3S3 and Fe4S3 cuboidal subunits bridged by two or three sulfide ligands.1,6 In order to identify the site of reduction of nitrogenase and the mechanism involved in the reduction process, much research has been carried out by the formation of various metal complexes. Here, to see if the binding site is Fe, a tris(thiolato)phosphine ligand, P(C6H3-3-Me3Si-2-S)33−(PS3†³), is used as the platform to obtain the iron(II) complex, [P(Ph)4][Fe(PS3†³)(CH3CN)] (A).5 Also, a substrate-bound and product-bound adducts, [N-(Bu)4][Fe(PS3†³)(N2H4)] (B) and [N(C2H5)4][Fe(PS3†³)(NH3)] (C), are synthesized. To determine whether the binding site is the V in vanadium nitrogenase, [P(Ph)4][V(PS3†²Ã¢â‚¬ ²)(Cl)] (D) and [P(Ph)4][V(PS3†²)(Cl)] (E) [PS3†² = P(C6H3-5-Me-2-S)33-] are synthesized. Methods Synthesis of [P(Ph)4][Fe(PS3†³)(CH3CN)]: FeCl2 was added to a solution of H3[PS3†³] and n-BuLi in acetonitrile in the ratio of 1:1:3 respectively, to give an emerald solution. To this [P(Ph)4]Br in acetonitrile was added followed by ether, and then the solution was placed at −30 °C for 3 days. This yielded an emerald crystalline solid of [P(Ph)4][Fe(PS3†³)(CH3CN)] ·4CH3CN ·(C2H5)2O. Synthesis of [N-(Bu)4][Fe(PS3†³)(N2H4)]: H3[PS3†³], Li and FeCl2 was reacted in ethanol in the ratio of 1:3:1 respectively, which gave a green solution. It was followed by the addition of excess N2H4 ·H2O. Then, [N(Bu)4]Br was added and the reaction mixture was kept at −15 °C for 2 days. This resulted in a green crystalline solid of [N-(Bu)4][Fe(PS3†³)(N2H4)] ·5C2H5OH. Synthesis of [N(C2H5)4][Fe(PS3†³)(NH3)]: H3[PS3†³], Li and FeCl2 was reacted in ethanol in the ratio of 1:3:1 respectively, which gave a green solution. Then it was charged with NH3 gas (1 atm) to generate an emerald solution. Then, [N(C2H5)4]Br was added in ethanol, and the solution was kept at −15  °C for 2 days. A green crystalline solid of [N(C2H5)4][Fe(PS3†³)(NH3)] ·3C2H5OH was obtained. All the structures were characterized by X-ray crystallography. Catalytic reactivity of [P(Ph)4][Fe(PS3†³)(CH3CN)]: To observe the catalytic activity, an external reductant, [CoCp2] and a proton source, [LutH][BAr†²4] was used (CoCp2 = cobaltocene, LutH = 2,6-lutidinium, and Ar’ = 3,5-(CF3)2C6H3) and all the reactions were carried out in a N2 enivironment. First, [P(Ph)4][Fe(PS3†³)(CH3CN)] and CoCp2 was dissolved in CH3CN in 1:1 ratio of the complex to the reductant. Then, N2H4 and [LutH][BAr†²4] were added to the solution in 1:1:2 ratio (complex: hydrazine: proton source). The reaction was carried out at ambient temperature for about 30 mins. Concentrated HCl was used to quench the reaction. Then, the solvent was removed by vacuum and the solid was extracted with distilled water. Finally, the insoluble residue was removed and the filtrate was taken to do ammonia analysis13 and hydrazine analysis.14 Synthesis of [P(Ph)4] [V(PS3†²Ã¢â‚¬ ²)(Cl)] (D) and [P(Ph)4] [V(PS3†²)(Cl)] (E) VCl3(THF)3 in THF, H3[PS3†³] in methanol and Li were reacted together in a 1:1:3 ratio. This gave a deep red solution. Then, PPh4Br in CH2Cl2 was added and it was layered with pentane. Which gave a red crystalline solid of D. E was synthesized using the same procedure but using the H3[PS3†²] ligand. Catalytic reactivity of [P(Ph)4] [V(PS3†²Ã¢â‚¬ ²)(Cl)] (D) and [P(Ph)4] [V(PS3†²)(Cl)] (E) The catalytic reduction of hydrazine by D and E were determined using cobaltocene and 2,6-Lut.HCl, using the same procedure as for A. Results and Discussion It was identified from X-ray crystallographic data that the three complexes, A, B, and C were crystallized with solvent molecules. Complex A had four CH3CN molecules, B had five C2H5OH molecules and the complex C had three C2H5OH molecules. These solvent molecules filled the voids in these structures by the formation of hydrogen bonds. It was also identified that the three complexes has a five coordinate iron(II) center with a trigonal bipyramidal geometry, which was formed by bonding to the PS3†³ ligand and to the nitrogen in each ligand (CH3CN, N2H4 and NH3 in complexes A, B, and C respectively). Complexes D and E also show a trigonal bipyramidal geometry at the vanadium(III) center in the same manner as in A, B, and C. This can be seen in the ORTEP diagrams shown in (Figure 1). The results of the catalytic activity of A, for the reduction of hydrazine to ammonia are given by Table 1, those for D are given in Table 2. According to Table 1, the maximum conversion ~83 % is obtained at 30 mins for the catalyst A. For D, ~83 % conversion was obtained after 24 hrs. But a conversion percentage of 90 was obtained after 48 hrs. A controlled reaction was carried out in the absence of complex A. For that reaction, only less than 5 % of hydrazine was converted to ammonia. According to eq 2, hydrazine can decompose into ammonia and nitrogen. 3N2H4 à ¯Ã¢â‚¬Å¡Ã‚ ® 4NH3 + N2(2) To interpret the amount of ammonia formed by the decomposition reaction rather than the reduction, the reactions were carried out for both A and D without using the proton and the electron source. The corresponding data for A are given in Table 3. Accordingly, the conversion to ammonia at 30 mins is only 8 % and it was 15.6 % after 1 hr. Therefore it is safe to assume that the majority of ammonia production for A is carried out by the reduction process. There was no production of ammonia for D in the absence of the proton and the electron source. Figure 1: ORTEP diagrams of (a) A ·4CH3CN ·(C2H5)2O, (b) B ·5C2H5OH, (c) C ·3C2H5OH, (d) D and (e) E Table 1: Production of ammonia by A via the catalytic process at different reaction time. Time (min) N2H4 added (eq) NH3 yield (mol) NH3 yield (eq) Conversion (%) 5 6.0 1.32 Ãâ€" 10-4 5.3 44 10 6.0 1.66 Ãâ€" 10-4 6.6 55 20 6.0 1.85 Ãâ€" 10-4 7.4 62 30 6.0 2.50 Ãâ€" 10-4 10.0 83 60 6.0 2.49 Ãâ€" 10-4 10.0 83 Table 2: Production of ammonia by D via the catalytic process at different reaction time. Time (min) N2H4 added (eq) NH3 yield (mol) NH3 yield (eq) Conversion (%) 1.5 5.0 5.19 x 10-5 2.1 21 6 5.0 8.97 x 10-5 3.6 36 12 5.0 1.48 x 10-4 5.9 59 18 5.0 1.85 x 10-4 7.4 74 24 5.0 2.06 x 10-4 8.2 82 48 5.0 2.25 x 10-4 9.0 90 Table 3: Production of ammonia for A by the decomposition of hydrazine. Time (min) N2H4 added (eq) NH3 yield (mol) NH3 yield (eq) Conversion (%) 5 6.0 9.27 Ãâ€" 10-6 0.37 4.6 10 6.0 1.18 Ãâ€" 10-5 0.47 5.9 20 6.0 1.35 Ãâ€" 10-5 0.54 6.8 30 6.0 1.61 Ãâ€" 10-5 0.6 8.1 60 6.0 3.11 Ãâ€" 10-5 1.2 15.6 The isolation of the products B and C, the substrate bound and product bound complexes respectively, suggests that the catalytic reduction takes place at single iron site which is supported by the PS3†³ ligand. The mechanism for this can be thought as the bound CH3CN molecule in complex A is replaced by a molecule of hydrazine to give the substrate bound complex B. At this stage, the N-N bond of the bound hydrazine in the iron (II) center is not activated. Therefore, by the addition of a proton source to protonate the hydrazine molecule would allow for the bond breaking of the N-N bond. Hence the first ammonia molecule will be released and a FeIVNH2 intermediate will be formed. Then, FeIVNH2 will be converted to FeIINH3 by another protonation in the presence of an external electron source. Finally, the second ammonia molecule will be released. This reaction pathway can be shown by Scheme 1. Scheme 1: The reaction pathway for the catalytic reduction process of A The catalytic reduction of hydrazine by E did not yield any ammonia. This implies that the bound chloride in E is not exchanged with CH3CN; instead the complex dissolves in it. However this exchange takes place in D, hence the catalytic activity is visible. The reason for the differences in reactivity for these two complexes, D and E, can be accounted by the two ligands, PS3†³ and PS3à ¯Ã¢â‚¬Å¡Ã‚ ¢ respectively. In PS3†³ ligand, there are more electron donating substituents than in the PS3à ¯Ã¢â‚¬Å¡Ã‚ ¢ ligand. Therefore, the most electron donating ligand, PS3†³ ligand, will donate more electrons to V and will facilitate the replacement of the bound chloride with a CH3CN molecule. Hence, the exchange will not take place in E. Therefore the reduction of hydrazine will not take place. Conclusion In summary, it is possible to say that Fe, in MoFe-cofactor, and V, in vanadium nitrogenase, act as the binding site of hydrazine, an intermediate of nitrogen fixation, mimicking the late stages of the nitrogen cycle. Since both the complexes are formed in a tris(thiolato)phosphine ligand platform, the reactivity of the two complexes are comparable. Hence, by comparing the conversion percentages of the two complexes, A and D, with time, it is possible to conclude that the iron complex (A) is far more efficient than the vanadium complex (D). For further studies, this research can be extended by including Mo in both these complexes and by the formation of cubanes. This would introduce a more complex nature to the complexes and would represent the enzyme more effectively. Moreover, it is possible to compare the efficiency of Mo, by forming complex with Mo on a thiolate platform. Research Proposal Title: Proper Identification of the Site of Reduction in Nitrogenase by the Catalytic Reduction of Hydrazine to Ammonia. Introduction: The three forms of nitrogenase with Mo, Fe and V,4 have been identified. Yet, the exact mechanism and the site of reduction is still not fully understood. Studies through hydrazine have suggested that the binding sites are at Fe in the MoFe-cofactor,5 Mo in the MoFe-cofactor1,6 or in a VII state in vanadium nitrogenase.7 There has been many debates over this topics and much research has been conducted to identify the exact metal atom on which the binding take place. No research has been conducted by including Fe-Mo and V-Fe together. If these two complexes are formed, we might be able to properly identify the site of binding of N2 in nitrogenase. The enzyme in question is bulky, which is the nature of an enzyme. Hence, to include this bulkiness in the model compounds, we can use cubanes of complex nature. Furthermore, by optimizing these complexes, we may be able to use them in the industry instead of the Haber process. Goal: Identify the proper binding site of hydrazine by including both metal atoms in the complex and to use a more complex environment to properly mimic the catalytic activity of the enzyme. Aim: Synthesis of MoFe- complex and VFe-complex Synthesis of cubanes of the two mentioned complexes Methodology: FeCl2, MoCl2, H3[PS3†³] and n-BuLi are mixed in 1:1:2:6 ratio in acetonitrile. After 24 hrs, PPh4Br in acetonitrile will be added to the reaction mixture. Then, the solution will be layered by the addition of ether. Later, the solution can be kept at -30 à ¯Ã¢â‚¬Å¡Ã‚ °C for about three days. This will result in a complex with Fe and Mo. To check the catalytic activity, the complex: cobaltocene: N2H4: [LutH][BAr†²4] in the ratio of 1:2:1:2 respectively, can be used. First, the complex and cobaltocene are dissolved in acetonitrile. Then, N2H4 and [LutH][BAr†²4] in acetonitrile are added to the mixture. The reaction is carried out at ambient temperature for 30 mins. Afterwards, conc. HCl is added to quench the reaction and then the solid will be filtered and removed. Finally the filtrate will be taken and ammonia analysis and hydrazine analysis will be carried out using the indophenol method13 and PDMAB14 method respectively. References: Demadis, K. D.; Malinak, S. M.; Coucouvanis, D. Inorg. Chem. 1996, 35, 4038. Einsle, O.; Tezcan, F. A.; Andrade, S. L. A.; Schmid, B.; Yoshida, M.; Howard, J. B.; Rees, D. C. Science 2002, 297, 1696. Danyal, K.; Inglet, B. S.; Vincent, K. A.; Barney, B. M.; Hoffman, B. M.; Armstrong, F. A.; Dean, D. R.; Seefeldt, L. C. J. Am. Chem. Soc. 2010, 132, 13197. Malinak, S. M.; Demadis, K. D.; Coucouvani, D. J. Am. Chem. Soc. 1995, 117, 3126. Chang, Y-H.; Chan, P-M.; Tsai, Y-F.; Lee, G-H.; Hsu, H-F. Inorg. Chem. 2014, 53, 664. Coucouvanis, D.; Mosier, P. E.; Demadis, K. D.; Patton, S.; Malinak, S. M.; Kim, C. G.; Tyson, M. A. J. Am. Chem. Soc. 1993, 115, 12193. Chu, W-C.; Wu, C-C.; Hsu, H-F. Inorg. Chem. 2006, 45, 3164. Demadis, K. D.; Coucouvanis, D. Inorg. Chem. 1995, 34, 436. Demadis, K. D.; Coucouvanis, D. Inorg. Chem. 1995, 34, 3658. Palermo, R. E.; Singh, R.; Bashkin, J. K.; Holm, R. H. J. Am. Chem.Soc. 1984, 106, 2600. Zhang, Y.-P.; Bashkin, J. K.; Holm, R. H. Inorg. Chem. 1987, 26, 694. Wong, G. B.; Bobrik, M. A.; Holm, R. H. Inorg. Chem. 1978, 17, 578. Chaney, A. L.; Marbach, E. P., Clin. Chem. (Winston-Salem, N. C.) 1962, 8, 130. Haji Shabani, A. M.; Dadfarnia, S.; Dehghan, K., Bull. Korean Chem. Soc. 2004, 25, 213. 1

grendelbeo Epic of Beowulf Essay - The Monstrous Grendel :: Epic Beowulf essays

The Monstrous Grendel  of Beowulf   It is true that Grendel is monstrous. He is not only a deadly enemy to Hrothgar and Herot, but to the Geats in general. Grendel seems to take his only pleasure from assaulting Herot and destroying the warriors inside. He is a bane to all those that live under Hrothgar's rule. They hate him. He is called the â€Å"enemy of mankind† (29) and rightly so. However, because of Grendel’s actions, they cannot see the other part of Grendel that makes him do the evil he does. Grendel, like the Angels before and the Geats soon after, is symbolic of displaced races/peoples and not simply a mindless monster. When Adam and Eve had children, they had two boys. Their names were Cain and Able. When Cain killed Able, God â€Å"banished him far from mankind† (29). From Cain came trolls, elves, monsters, and giants. Grendel is a descendant of Cain, so he shares Cain’s banishment. Cain may have been the first displaced person after Adam and Eve were thrown out of the Garden. G rendel shares his ancestor’s sentence. He is displaced not only from whatever land or wealth he would have if he were â€Å"human† but he is also displaced form God. It is this displacement that causes Grendel to destroy. Since he cannot â€Å"approach the throne† (28) like other people, he chooses to try to destroy the throne, because he has â€Å"no love for him (God)† (28). This is the main reason Grendel is symbolic of displaced peoples. After all, he is a direct descendent of the very first displaced people, Adam and Eve. However, unlike Adam and Eve, Grendel is doomed to an eternity of banishment from God’s light because of Cain’s sin against his brother. That is why Grendel kills, because he cannot be in the light, because he is at war with God. Grendel is not only banished from God’s light, but from the light in general. Throughout the text, references are made to Grendel as â€Å"the walker in darkness† (36), and †Å"the dark-death shadow† (29). This kind of imagery further shows how displaced Grendel has become. The text refers to him as a â€Å"creature deprived of joy† (36). The text also refers to Grendel’s dwelling as â€Å"his joyless home† (37). It is no wonder Grendel was considered so monstrous. Like other displaced peoples, he has nowhere that is a refuge to him, because he has been removed from his home, or in Grendel’s case, the love of the Lord.

Love in Allisons Bastard Out of Carolina :: Bastard Out of Carolina Essays

Love in Allison's Bastard Out of Carolina "Love" is a word, a signifier, tied to many meanings, all different in context, cultures, and ideologies. Love is used numerous ways in Allison's Bastard Out of Carolina, by many characters. In the character of Bone, love is a confused thing, always changing, as Bone uses it to fit her life on the fly. In relation to parental love, Bone wants Daddy Glen to love her. However, early in the book, Bone's conception of "love" is that of a child, obviously. On page 52, she says, "I wanted him to love us. I wanted to be able to love him. I wanted him to pick me up gently and tell Mama again how much he loved us all." This idea of love is simple, involving hugs, smiles, and friendliness, the sort of "love" Bone gets from Anney. However, as Bone's relationship with Glen changes, so does her perception of "love". On page 108, Glen asks Bone, "'Don't you know how I love you?'" Bone thinks to herself, "No, I did not know." This is near the beginning of Bone's confusion about love, what it means, and what it does. At the time he asks her, he is molesting her. It is no wonder that Bone was confused, having love expressed simply, from her mother, and sexually (if indeed it is "love") from Glen. This confusion leads bone to question the idea of love, and to look elsewhere for it, perhaps to compare. Love, she finds, is a prominent idea in the Southern Baptist church. Bone is enthralled with the black and white of Christianity, the definitive line drawn between good and evil, because she can see where the love is, and what it does. She believes she can see that other people truly love one another, and believing this, she thinks the has a better grasp on the abstract idea of love. However, as Bone later discovers, love is abstract, and being abandoned by her mother, she never truly figures it out. The problem within, for Bone, is that love is a conceptual idea, and that, really, it means something different to each person. Not only that, but love is used by others, in ways that may not suit anyone else's conceptions of the idea. So when Anney insists to Bone and everyone else that Glen loves her and her girls, Bone tends, of course, to believe her, and thus the idea of love is transferred to how Glen treats Bone.

AussieBum Reflection Essay

AussieBum is an Australian male underwear and swimwear brand. The company is based in Sydney’s inner-west and has become one of Australia’s most sought after brands. Originally just a hobby for company founder Sean Ashby, AussieBum started in the corner of his living room. As time progressed and his brand became popular, operations moved out of his living room and expanded into a company warehouse. After being shunned by Australian retailers, the company moved online. Once word got out about the Australian surf-cultured underwear, the rest of the world became interested. AussieBum’s prime function is selling men’s underwear and swimwear to a target market of young men aged between 16 and 39. At this stage, AussieBum would be in the maturity stage of the Business Life Cycle because it has already expanded and grown to be a large company. At this stage it is focused on the selling of its products before renewing it’s brand. AussieBum have hit the mark with their marketing and brand strategy, which allows them to mature for longer. The company has a goal to turn over more than $20 million dollars in a year. AussieBum also wants to see more people wearing their products. AussieBum has a partnership as its ownership form. This is the best structure as it allows the company to be guided by two people rather than dictated by one. It also leaves the two leaders answerable to each other so that there is no misguided activities or ideas that are not regulated or thought through well enough. A major challenge was faced during the initial stages of the company. They were shunned by Australian retailers, which gave them no opportunity to launch their brand in stores. They reciprocated their downfall into success by launching a website which has enabled them to become a global company. The e-business approach was a positive move for AussieBum. Consumers purchase AussieBum’s products online from anywhere in the world, easily allowing the company to go global. Originally the e-business model as adapted so that the company could get their brand in the public eye without having a retailer carry it. AussieBum’s marketing strategy has been simple, but unique. There have been no television or radio advertisements; instead there have been several online campaigns to promote the company. In relation to the four P’s, they have always let their product do the marketing work. By having their products on show in the public eye, it has made the public aware of the brand. The prices are not as expensive as exclusive brands, but carry the same level of design and quality, making it an affordable alternative. By having their product in the right place, the product is promoting itself. The promotion of the business is mainly done in the online world. Photo-shoots are done with attractive, well-built Australian models in Australian environments e.g. Bondi Beach and used on their websites and other internet sites like Facebook and other social networks. I believe that AussieBum’s marketing strategy has been extremely successful. Their strategy proves the power of the consumer. They strategy has made their product highly desirable and sought after across the world. The increasingly higher popularity of the internet over the years would have helped their strategy to be successful. Sean Ashby can be considered an entrepreneur as he demonstrates qualities that are essential to their success. By being resilient and using initiative, Sean was able to re-group after being rejected by Australian retailers and use his initiative to start an online portal for his brand, eliminating the need for a retail outlet. He has also had the determination to be able to keep working on his company to bring it to the success levels that it is experiencing. I would suggest that the company attempt to move their brand into elusive Australian department stores e.g. Myer and David Jones to boost their profit. From reading the AussieBum article, I have learned to think outside the box and not to ‘stick to the status quo’. Sean Ashby has proved that there are more ways to make a retail brand successful than just selling it in stores. He also proved that there better ways to connect with the consumer than just advertising. AussieBum Mission Statement: AussieBum aims to bring a burst of energy and uniqueness to your underwear. We spice up what’s underneath. AussieBum will make you feel confident and proud to show what’s hiding. We want you to be excited about AussieBum shopping, and get excited to wear AussieBum.