Levels of obesity Essay Example | Topics and Well Written Essays - 1500 words

Levels of obesity - Essay Example Besides, the inadequate desire to follow active lifestyles contributes equally to obesity as much as the laziness concerning exercising and keeping health does. Many people have less information on the threat of obesity in their lives, hence ignoring the numerous campaigns and interventions made by different agencies to highlight the impact of obesity in the human lifestyle. In general, the lack of accountability and responsibility sums up the major reason behind the escalating statistics of obesity. This essay will evaluate the importance of government interference in trying to decrease the levels of obesity. It will scrutinize the different strategies applied by the UK and USA governments in tackling this health menace. Indeed, both governments acknowledge the fact that obesity is not just a social problem, but a hindrance to economic growth as well (Cecchini & Sassi, 2012). Therefore, both governments have come up with intensive collaborative processes that deliver comprehensive manuals containing the desirable nutrition, lifestyles and exercises that aim at reducing and possibly eliminating the problem of obesity. Evidently, it is the role of every government to improve the social health of the society and the citizens at large. Trough intervening in tackling obesity, the government aims at reducing the death rate arising from the diseases caused by obesity. As earlier mentioned, obesity because a myriad of diseases that threaten to terminate the lives of people at earlier ages than expected. In addition to that, the cost of obesity is extremely high if the above diseases are factored in. Given the high cost of attaining quality medication, the government opted to reduce the burden of health complications caused by obesity. Potentially, obese individuals visit health facilities more frequently than their healthier weight counterparts do. These numerous visits translate to higher medical bills and consequently

Traditional Marketing Essay Example | Topics and Well Written Essays - 3000 words

Traditional Marketing - Essay Example Traditional marketing is in effect focused on markets and products, giving little consideration to customers - what they want and need, how they buy and when. Adrian Payne (1991) notes that "traditional marketing concentrates on product features, has minimal interest in customer service, limited customer contact, and where quality is primarily a concern of production." The marketing mix approach is "too limited to provide a usable framework for assessing and developing customer relationships in many industries and should be replaced by an alternative model in which the focus is on customers and relationships (Gordon, I., 1999)." For these reasons, not a few companies soon found traditional marketing ineffective in selling consumer products. If sales were made at all, the level does not warrant the expense sunk in the traditional marketing tools such as radio, TV and outdoor ads as well as trade shows and direct mail. Gradually, it was acknowledged that traditional marketing is not suitable for selling relatively low-value products to the broad masses of customers. In this case, the sales income is often not commensurate with the advertising and promotional costs. In the search for a marketing system that would broaden the product scope and concentrate on how to retain customers instead of simply attracting customers to products and services, marketing experts came up with the idea o... The earliest users of the term relationship marketing included Len Berry (1983) and Jag Sheth at Emory. Theodoro Levitt (1983) of Harvard subsequently expanded the initial concept to cover activities beyond individual transactions. Customer retention is at the heart of relationship marketing. Unlike the traditional marketing approach, which goes by one-shot individual transactions, relationship marketing seeks to build longer-term relationships with the customers. Thus, it calls for ways to understand the customer's needs as they go through their life cycle and provides a range of products or services as the customers need these at each cycle. In short, keeping the customers forever (Gordon, I., 1999). The idea of seeking to provide the customer's specific needs at each phase of his life led to the development of relationship marketing. Increased profitability is the common objective of both the traditional and relationship marketing strategies but the most glaring difference is that one makes a sale and then moves on to another prospect, while the other stays with one customer longer to attend to all his needs. This is service marketing at work, which means servicing the customer's necessities from childhood to adolescence, from middle age to his senior years. Less Cost, More Benefits The advantage of relationship marketing is that despite the expanded scope and longer attention span provided by the companies to customers, the cost of retaining an existing customer is said to be about 10 per cent less than the cost required in acquiring a new customer. Moreover, the company derived other benefits such as referrals. (Wikipedia)

The Reigh Of Louis XVII Essay Example for Free

The Reigh Of Louis XVII Essay Louis XVII came to the throne in 1814 as the rightful heir. After the defeat of Napoleon there were two possible branches of the Bourbon family. The elder branch, which was Louis XVIII (brother to guillotined Louis XVII) and the younger branch, which was Louis Phillippe, duc dOrleons. It was left to the allies to choose who should rule, and they did not want France to be a republic. However Europe could no establish who should be the new ruler of France. They therefore decided to let France choose for herself. This was just a way of covering up the fact that they couldnt choose a ruler themselves. However there was no intention of consulting the people of France through any system of voting. Talleyrand, once Napoleons legal servant, was in favour of the Bourbons returning. It was therefore him who convinced the allies that there was widespread support in France for the restoration of the Bourbons, and when Wellington entered Bordeaux to be met by crowds of people shouting vive le roi (long live the king) it convinced the allies that the restoration was stood a good chance of success. Therefore in April 1814 Louis XVIII returned as king. Louis XVIII, at the time he came to the throne, was aged fifty-nine years old. He was over weight and walked with difficulty. His personality was dull and uninspiring. He was known to be a firm believer in the divine right of kings. His character was such that he lacked charm and the truth was, that he was wanted for what he stood for, rather than what we really was. When Louis XVIII came to power, the economy was strong, and this was therefore good and positive for his reign. Louis XVIII did not squander the advantages he possessed. By supporting capable ministers, especially his favourite, Elie Decazes, he ensured the governments finance was on a firm footing. With the war fees paid off by 1818 foreign troops withdrawn, the country was able to settle down after the costly glory of Napoleonic era. In fact under Louis XVIII an effective system for controlling government spending was developed that was to last with out any major adjustment for more than a hundred years. The allies feared because they thought French people grown use to national glory would soon get bored of a dull monarchy. They need not to worry. It seems that although most French people were pleased to bask in the glory, they did not immediately miss the pleasure when it was no longer available. Louis XVIIIs greatest success was managing to convince the pays legal that he intended to make the charter if 1814 a working reality. He did this by restraining those supporters who wanted to undermine the charter, or even do away with it altogether. Also by communicating a general belief that in it as providing the basis for political life in France in the future. These Ultra-Royalist, known as the Ultras, were even more Royalist than the King himself. They hoped to day with the charter as soon as possible. However Louis XVIII was in sympathy with some of their views. Yet because he did not possess great strength of character, he was unable to resist all their demands. The Ultras, however, did gain some success. When the law to compensate the ÃÆ' ©migrÃÆ' ©s was passed in 1825, the reaction of the pays legal was very hostile. For ten years the ÃÆ' ©migrÃÆ' ©s felt discontent that their loyalty to the royal family and the ancien regime, which had lost them their lands and fortunes, had received scant reward. Many of them had been given official positions to fill and their ranks recognised. However most of them still lacked financial security and they would therefore have liked their lands restored back to them. But even Charles X saw that to attempt this would be such a basic attack on the revolutionary settlement that it would probably have been resisted by force So the law of 1825 confirmed the rights of present owners of the market value of any land that had been confiscated in the 1790s, and by compensating the ÃÆ' ©migrÃÆ' ©s by making them an annual grant of money. Louis XVIII success also included the Charter. As stated above, Louis managed to convince the pays legal that he intended to make the charter a working reality. Th Charter of 1814 stated that there would be freedom for the press, although there would be laws passed to check the abuse of this freedom. It had been assumed by most of the pays legal that this meant that people would be free to publish what they wanted although they would be liable for legal action after the events if they had printed anything  contrary to the law. This was not how the Charter was interpreted by Louis XVIII, and he made efforts to prevent the publication of anything they regarded as hostile to the regime. Between 1814 and 1822 the government generally tried to control the press by insisting that no political news or comment was published until it had been passed by the censor. Despite Louiss age, his immobility, his belief in the divine rights of the king, his heavily influence by Madam du Cayla and his failure to compensate the ÃÆ' ©migrÃÆ' ©s, I strongly believe that his strengthens and successes out weighed these. Among his successes, he managed to convince the pays legal that he intended to make the Charter a working reality, keep his throne while managing to suppress opponents, acted according to the Charter and did not allow the Ultras to get much power and dominate. He also did not allow himself in party politics, which meant he could be neutral and not favour one party over another. This meant a downfall of a minister would not bring him down. Lastly, Louis XVIII was the rightful king in France and therefore he could diminish opposition.

Mechanisms of Adsorption of Aormatic Nitrogen Compounds

Mechanisms of Adsorption of Aormatic Nitrogen Compounds MECHANISMS OF ADSORPTION OF AORMATIC NITROGEN COMPOUNDS AND AROMATIC COMPOUNDS ON METAL-ORGANIC FRAMEWORKS (MOFs) by JUN DAI Metal-Organic Frameworks (MOFs) constitute a class of novel porous materials which have attracted significant interest due to their application in separation, storage, catalyst and sensing. Large surface area and porous cavity make MOFs excellent absorbents with huge uptake capacity. In this paper, we studied adsorption mechanisms of adsorption of indole and naphthalene on Basolite F300, Basolite A100 and MIL-100 (Fe) by two complementary spectroscopic methods. Fluorescence spectroscopy and near-UV/Visible diffuse reflectance spectroscopy study demonstrate that naphthalene is quantum confined within the mesoporous cavity in F300. On the other hand, indole is weakly electronically bound to Fe (III) CUS in F300 and forms adsorption complex with F300. Direct spectroscopic proof of adsorption complex is provided by near-UV/Visible spectroscopy and fluorescence spectroscopy. Quenching of ligand-based fluorescence of A100 by indole is suggested and we propose adsorption of indole and napht halene onto A100 via Ï€-Ï€ interaction, spectroscopic proof is provided by fluorescence spectroscopy.   Table of Contents Title Abstract Acknowledgements and Dedication Table of Contents 1 Introduction 1.1 Metal Organic Frameworks (MOFs) 1.2 Clean Fossil Fuels 1.3 Nitrogen Aromatic Compounds in Fossil fuels 1.4 Aromatic Compounds in Fossil Fuels 1.5 Methods of Denitrogenation 1.5.1 Microbial Denitrogenation 1.5.2 Hydrodenigrogenation (HDN) 1.5.3 Adsorptive Denitrogenation (ADN) 1.6 Activation of Open Metal Sites of Metal-Organic Frameworks 1.7 Adsorption of Aromatic Compounds and Aromatic N-heterocyclic Compounds on mesoporous MOFs with CUS: MIL-100 (Fe) and F300 1.8 Adsorption of Aromatic Compounds and Aromatic N-heterocyclic compounds on microporous MOFs without CUS: MIL-53 and A100 1.9 Research Objective 2 Experimental 2.1 Metal Organic Frameworks 2.2 Solvents, Aromatic compounds and N-containing compounds 2.3 Activation and Hydration of Metal-organic frameworks 2.4 Fluorescence Spectroscopy 2.5 Near UV-Vis Diffuse Reflectance Spectroscopy (near UV-Vis DRS) 2.6 Model Fuels 2.7 Solid Mixture of Aromatic and Aromatic N-hetrocyclic compounds with MOFs 2.8 Stoichiometric adsorption complex of F300 and naphthalene in eicosane matrix 2.9 Kinetic adsorption of liquid indole on Basolite F300 (FeBTC) in liquid phase 2.10 Stoichiometric adsorption complexes of indole/naphthalene with MOFs 2.11 UV radiation 3 Results 3.1 Spectroscopic Studies of adsorption of naphthalene and indole on mesoporous F300 and MIL-100 (Fe) with CUS 3.1.1 Solid Mixtures of MOFs and organic aromatic compounds 3.1.2 Fluorescence spectrum of pure naphthalene List of Figures Figure 1: Structure of MIL-100 (Fe) (see as S1 in supplementary) Figure 2: Structure of MIL-53 (Al) (see as S2 in supplementary) Figure 3: Common nitrogen compounds existing in fossil fuels Figure 4: Pathways for the transformation of quinoline Figure 5: Fluorescence spectrum of (A) 0.08 M liquid solution of naphthalene (NAP) in n-heptane, ÃŽ »exc = 280 nm, bandwidth: Exc. Slit 5 nm/Emi. Slit 5nm. (B) 0.08 M liquid solution of NAP in n-heptane with multi-Gaussian curve fitting Figure 6: Fluorescence spectrum of (A) pure naphthalene (NAP) ÃŽ »exc = 280 nm, bandwidth: Exc. Slit 5 nm/Emi. Slit 5nm (B) pure NAP with multi-Gaussian curve fitting List of Tables Table 1: MOFs used in this research and structure information Table 2: Physical property of common nitrogen aromatic compounds existing in fossil fuels 1 Introduction 1.1 Metal Organic Frameworks (MOFs) Porous materials are well studied and widely used in science and engineering industry. Recently, a novel kind of porous material ‘Metal-Organic Frameworks (MOFs)’ has emerged as potential competitor. MOFs are crystalline hybrid inorganic-organic porous solid formed by chemical metal-linker bounding1. Metal-Organic Frameworks (MOFs) constitute a class of novel porous materials which have attracted significant interest due to their application in separation, storage, catalyst and sensing. The use of MOF as stationary phase in high resolution GC separation of aromatic hydrocarbons has also gained significant attention2. In comparison with adsorption on the MOFs in gas phase which has been well studied and understood, adsorption on the MOFs in liquid phase is much less known. MOFs have extremely large surface area and porous cavity, which make them excellent adsorbents with huge uptake capacity. As a class of coordination compound repeated by metal or metal clusters as SBUs (second building units) and organic linkers, the cavity ranged between that of Zeolite and mesoporous silica3. Regarding the structures, variety of MOFs can display either 2 dimensional or 3 dimensional structures depend on different organic linkers. It is also indicated by J. R. Karra and K. S. Walton that the relation between pore size and guest molecule size plays an essential role in the adsorption4. The MOFs being investigated in this research are mesoporous and microporous MOFs. For mesoporous MOFs the pore size can vary from 2 nm to 50 nm, while for microporous MOFs the pore size is less than 2nm. Pore size can be a key in adsorption on MOFs due to micropore filling mechanism2, which suggests adsorption capacity depends on molecular cross-sectional area rather than minimum diameter. MOFs are structurally stable under ambient environment. It is reported by many authors that MOFs remain stable under increased temperature and under oxygen. In this research, our investigation mos tly focuses on several common MOFS, and their commercial names are Basolite C300, Basolite F300, Basolite A100 and MIL-100 (Fe) (MIL=Materials of Institute Lavoisier). All Basolite C300, Basolite F300 and Basolite A100 are bought commercially, and MIL-100 (Fe) is made with the collaboration of Dr. Jing Li from Rutgers – New Brunswick. Table 1 shows the basic physical information of the MOFs used in this research. Table 1: MOFs used in this research and structure information MOFs/formula Surface area/m2g-1 Pore dimension/Ã… Pore dimension Ref. BET Basolite F300 1300~1600 21.7 3D Sigma-Aldrich,5 Basolite A100 1100~1500 7.37.7 1D Sigma-Aldrich, MIL-100 (Fe) 2200 25, 29 3D 5 MIL-100 family MIL-100(M) (M=Cr, Fe, Al) refers to a family of mesoporous Metal-Organic Frameworks built up from metal clusters and benzene-1, 3, 5-tricarboxylic (BTC) linkers. These MOFs possess large surface area and have recently attracted tremendous attention for applications in adsorption and separation due to the coordinated unsaturated sites (CUS) which can provide chance for Lewis acid-base interaction between guest molecules and metal ions or metal clusters. In Metal-organic frameworks, metal sites (SBUs) are coordinated with organic linkers. Open metal sites (CUS) may be available on these SBUs. CUS are very important in gas storage, separation, sensing, catalysts, and even biological systems6. Considerable amount of research on the adsorption of small molecules have been done recently. Evidence has shown open metal sites have essential influence on adsorption property in MOFs. It is reported that open Cu2+ metal sites in HKUST-1 contribute significantly to the high acetylene storage capa city7. Moreover, MOFs with CUS such as HKUST-1 are used in chromatography separation due to its specific feature to distinguish strongly and weakly electron donating analytes8. In additional, MIL-100 (Fe3+, Cr3+, Al3+) has been shown to have strong preference to adsorb N-heterocyclic compounds (Lewis base) in mixtures910. Hence, open metal sites can be potential Lewis acid sites, the possible interactions between guest molecules and open metal sites will be examined and discussed in this paper. In our research, MIL-100 (Fe) will be used to investigate the adsorption mechanisms between guest molecules such as indole or naphthalene and sorbent MOFs. Besides MIL-100, there is a commercially made MOF named Basolite F300, which has a similar chemical composition. Both Basolite F300 and MIL-100 (Fe) are built up by Iron and BTC linkers. However, due to the poor crystallinity, the actual structure of F300 is still not known at this time. Difference in iron content and carbon content in F300 and MIL-100 (Fe) is shown by D. Amarajothi and his co-workers5. The iron mass content in F300 and MIL-100 (Fe) are respectively 25% and 21%. The carbon mass content in F300 and MIL-100 (Fe) are respectively 32% and 29%. Pore dimension in F300 and MIL-100 (Fe) are respectively 21.7 Ã… and 25/29 Ã…. Structure of MIL-100 (Fe) is shown below: Figure 1: Structure of MIL-100 (Fe) (see as S1 in supplementary) MIL-53 family There are many types of MOFs that undergo hydrolysis, while there are other MOFs that remain stable within water. Water stable MOFs start to showing potential applications in drug delivery and imaging11. Many MOFs containing Al as metal sites and amino acids as organic linkers are stable in aqueous solution, and it is also possible to synthesize them in aqueous environment12. MIL-53(M) (M= metal as Al13, Cr14, Fe15, In16, Sc17) is a common family of microporous MOFs and has excellent water stability. Figure 2: Structure of MIL-53 (Al) (see as S2 in supplementary) The one dimensional pore structure of MIL-53(Al) is built by chains of corner-sharing octahedra aluminum clusters AlO4(OH)2 and anion form of benzene-1,4-dicarboxylic acid (BDC) as organic linkers connecting infinite numbers of metal clusters. MIL-53 (Al) has rhombic channels which have dimension of 7.3 x 7.7 Ã…. A huge Langmuir surface area of 1600 m2/g makes MIL-53 (Al) an efficient adsorbent. MIL-53 (Al) has extraordinary thermal stability up to 773 K. It is believed that the structure of MIL-53 (Al) undergoes a reversible structural change during process of adsorbing/desorbing water molecules, and is described as ‘breathing’13. The so-called ‘breathing’ process interchanges between large-pore (lp) form (Al(OH)[O2C-C6H4-CO2]) and narrow-pore (np) form (Al(OH)[O2C-C6H4-CO2]H2O) 13. The lp form has a dimension of 8.5 x 8.5 Ã… and is obtained when activated upon high temperature and under high vacuum, which takes away excess free BDC acids, oxygen and water trapped in the cavity during synthesis. The lp form is capable of adsorbing water molecules in vapor at room temperature, as a result, the MIL-53 (Al) shifts to its’ np form. As shown in the formula, the np form contains one trapped water molecule every unit or cavity. Hydrogen bonds are found to form between carboxylic groups on the linkers and adsorbed water molecules. Due to this ‘breathing’ feature, applications on selective adsorption of various compounds in gas phase have already gained interest and being reported14. The np form of hydrated MIL-53 (Cr) is able to selectively adsorb CO2 in presence of CH4 in gas phase. Upon adsorption of CO2 but not CH4, MIL-53 (Cr) returns to its lp form with an increased cavity volume of 1522.5 Ã…3 from np volume of 1012.8 Ã…3. In our research, we used Basolite A100 MOF from the BASF, which is commercially available and is equivalent to MIL-53 (Al). Similarly, A100 is build up with AlO4(OH)2 octahedral clusters connecting by BDC linkers, and gives a surface area of 1084 m2/g and pore volume of 0.51 cm3/g as determined by N2 physical-adsorption at 77 K. Additionally, XRD pattern of A100 is proved to resemble that of MIL-53 (Al)18. G. Blanco-Brieva and his co-workers have studied adsorptive removal of aromatic sulfur compounds from model liquid fuels on thermally activated A10019. 1.2 Clean Fossil Fuels Combustion of sulfur and nitrogen containing compounds in fossil fuels will bring adverse effect to public health, environment and economy. It is widely recognized that nitrogen compounds are normally carcinogenic and mutagenic. Separation of heterocyclic compounds from petro-chemical feedstock has become an urgent application leading to clean liquid fossil fuels. Fossil fuel is a primary source of energy on the earth, the intensive use of fossil fuels has raised environmental concerns. Beginning in 2006, the Environmental Protection Agency (EPA) began an ambitious program aiming to reduce the sulfur content of diesel fuels. As of July 11, 2010, the EPA required that the concentration of sulfur content in diesel fuels not exceed 15 ppm20. For certain ultra-clean gasoline, diesel fuels and jet fuels, sulfur level needs to be lower than 1 ppm21. Hydrodesulfurization (HDS) of diesel fuel has become an essential research interest, while the presence of nitrogen compounds in middle-distil late oil inhibits the ultra-deep hydrodesulfurization22232425. In HDS, sulfur compounds are hydrogenated to hydrocarbons and H2S over catalyst such as Zeolites9. However, the nitrogen aromatic compounds in crude oil are found to compete for the active sites on these catalysts to inhibit a deep HDS26,27. This gives rise to the necessity for denitrogenation in fossil fuels. Moreover, the combustion of nitrogen compounds in petroleum leads to the formation of NOx oxides, which is a group of highly reactive and persistent species and contributes directly to acid rain and greenhouse effect. The life time of NOx oxides in atmosphere is 120 years before being removed or destroyed through chemical reactions. The impact of 1 pound of NO ­x on warming the atmosphere is over 300 times that of 1 pound of carbon dioxide. EPA first set standards for NO2 in 1971, setting both a primary standard (to protect health) and a secondary standard (to protect the public welfare) at 0.053 parts per million (53 ppb), averaged annually28. Also the presence of nitrogen aromatic compounds in fossil fuels can lead to poisoning of refining catalyst, which will eventually cause a decrease in yield. Thus, denitrogenation is necessary for deep desulfurization and has drawn significant interest around the world due to the increasingly rigid regulations and fuel specifications in many countries. 1.3 Nitrogen Aromatic Compounds in Fossil fuels Fossil fuels are naturally-formed fuel that contains significant level of heterocyclic aromatic contaminants. There are some representative sulfur aromatic compounds such as benzothiophene (BT) and dibenzothiophene (DBT), representative nitrogen aromatic compounds such as indole and quinoline. Nitrogen aromatic compounds content in crude oil averages around 0.3%. Although the concentration of nitrogen compounds in crude oil is relatively low, the concentration turns out to be higher throughout the petroleum distillation process. Common nitrogen aromatic compounds in fossil fuels are shown in Figure 1.129 and physical properties of nitrogen aromatic compounds investigated in this research is shown in Table 2. Nitrogen aromatic compounds in fossil fuels fall into two classes. One is non-basic nitrogen compounds including indole and pyrrole due to the fact that the extra pair of electrons on N is contributed to the Ï€ electron cloud and is not available for interaction with acids. While the other class is basic nitrogen compounds such as pyridine, quinoline and their derivatives, in which the lone pair of electrons on N is available as an electron donor. Indole is one of the most common nitrogen compounds in fossil fuels, and it has been broadly studied. And we choose indole in our research due to the fact that indole is a weakly basic N-containing compound, which means it has a potential of selective adsorption against aromatic compounds and desorption is possible and reasonably convenient. Figure 3: Common nitrogen compounds existing in fossil fuels Table 2: Physical property of common nitrogen aromatic compounds existing in fossil fuels Compounds Formula Melting Point, ÃÅ'Ã…  C Density, g/cm3 Dipole moment, D Acidity,pKa Maximum diameter, ÃÅ'Ã…  A Indole C8H7N 52~54 1.17 2.11 16.2 6.9 Quinoline C9H7N -15 1.093 0 4.85 7.2 Isoquinoline C9H7N 26~28 1.099 0 5.14 7.2 1.4 Aromatic Compounds in Fossil Fuels Fossil fuels contain significant amount of hydrocarbons, most of them are aromatic compounds and polycyclic aromatic hydrocarbons (PAHs). In this research we choose naphthalene as representative aromatic compounds, and in order to investigate the adsorption mechanism we use fluorescence spectroscopy and UV-Vis diffuse reflectance spectroscopy to investigate electronic interactions upon adsorption onto MOFs. Naphthalene is the most simple and common aromatic compounds in PAHs. And naphthalene is commonly produced in petroleum refining and is then separated from the petroleum. Purification and separation of these aromatic rings is of interest in chemical industry. Naphthalene has a molecular length of 7.2 Ã… (largest diameter determined by ChemDraw 3D) and is non-polar. 1.5 Methods of Denitrogenation Microbial Denitrogenation Microbial process is an alternative pathway for denitrogenation. Microorganisms are known to consume natural organic compounds and convert them into carbons and energy, and they are capable of metabolizing certain molecules including nitrogen compounds from fossil fuels. The degradation of quinoline is well-characterized, and the transformation pathways are elucidated by M. Benedik et al29 (shown in Figure 1. 5). The degradation of isoquinoline is less understood but 1-oxo-1,2-dihydroisoquinoline is suggested as initial oxygenated product30. According to the finding of Claus, G, indole is readily degraded via catechol or transformed directly into tryptophan30, while carbazole is relatively more difficult to be degraded. One possible degradation pathway31 beginning with angular dioxygenation has been proposed by Ouchiyama, N., which finally enters TCA cycle after conversion to catechol or tryptophan32. Mechanisms for the degradation of other nitrogen compounds such as pyridine, quinol ine, acridine and their derivatives are reviewed in detail by J. Kaiser33. Recent research in microbial denitrogenation has revealed a promising future for application in selective removal of nitrogen- and sulfur-containing petroleum. However, as a major mechanism for the removal and metabolism of organic compounds from the environment, its’ characterization of the enzymes involving in the pathways is still under research29. And it has not been widely applied to the industry yet. Figure 4: Pathways for the transformation of quinoline Hydrodenigrogenation (HDN) Hydrodenitrogenation (HDN) is usually used to remove nitrogen compounds in fossil fuels during the refinery process, and Co-Mo catalyst is normally involved in the process. However, the HDS process is accomplished by reacting with hydrogen at high temperature and high pressure. It is energy-intensive, hazardous and costly. Thus, significant amount of researches have been done on HDN in order to reach a goal of being economic and environmentally friendly. Adsorptive Denitrogenation (ADN) Another promising way to selectively remove the nitrogen compounds in fossil fuels is adsorption on a porous material, Activated carbon34353637, Zeolites38, HCL-loaded silica-aluminas39, ion-exchange resins40, meso-silicas41,42, Ti-HMSs43, microporous carbon44, activated aluminas45, Ni-based adsorbents45, and NiMOs46 have been used for ADN. While recently the use of MOF adsorbents has gained significant interest in adsorption and separation of aromatic and heterocyclic compounds in liquid phase due to its’ high capacity, high selectivity, economic importance and most importantly energy saving 47. Moreover, MOFs can even be recycled and effectively reduce the cost. Adsorptive separation via â€Å"adsorptive denitrogenation (AND)† is preferred over industrial catalytic HDN10. Specifically, selective adsorption of N-heterocyclic compounds48 in presence of aromatic and aliphatic hydrocarbons in liquid phase49 is of interest, which is investigated in this research. 1.6 Activation of Open Metal Sites of Metal-Organic Frameworks Available CUS in MOFs is essential for the adsorption of Lewis basic compounds. Thus, to fully utilize the open metal sites in MOFs, activation is needed to evacuate the water molecules which are relatively weakly coordinated on these metals. Because MOFs are strongly adsorptive molecules, humidity can be crucial to the availability of open metal sites in MOFs. Specific treatment is necessary at certain temperature under vacuum in order to activate open metal sites. And protection of the sample against humidity is critical during experiments. Interestingly, it is discovered by K. Schlichte and his colleagues that upon activation the color of HKUST-1 would change from light cyan to dark navy50. This is confirmed by E. Borfecchia and his working group using UV-Vis, a red shift at LMCT edge and appearance of a shoulder in d-d band at around 600 nm in UV-Vis spectrum is observed and explained by the removal of water51. In addition to the activation of MOFs, partial reduction of MIL-100 (Fe) has been reported by H. Leclerc and his group52. Certain metal sites in MOF can be reduced, for example, Fe3+ in MIL-100 (Fe) can be reduced to Fe2+. According to their analysis of oxidation states via IR, outgassing at 423 K for 12 hour will give rise to a greater proportion of Fe2+ sites while minority of Fe3+ sites is reduced. However, outgassing at 523 K will result in that most Fe3+ sites are reduced. Fe3+ sites are more Lewis acidic sites than Fe2+, it is easier for Fe3+ to form coordination bond with nitrogen aromatics, which are good Lewis base. 1.7 Adsorption of Aromatic Compounds and Aromatic N-heterocyclic Compounds on mesoporous MOFs with CUS: MIL-100 (Fe) and F300 Although adsorption of small organic molecules on MOFs both in liquid phase and in vapor, such as toluene, benzene, xylene isomers2, etc., has been well studied in the recent years, to our knowledge the adsorption of fuse-ring aromatic hydrocarbons on MIL-100 in liquid phase has not been reported. M. Maes and his co-workers have reported adsorption of indole from heptane/toluene mixture solution on MIL-100 family9. Thus, mechanism of adsorption of aromatic compounds versus aromatic N-heterocyclic compounds on F300 has not been studied. According to many studies, the formation of complexes in liquid adsorption is usually assumed, but there is a lack of direct spectroscopic evidence. Adsorption of small aromatic ring compounds (benzene and p-xylene molecules) on MIL-101 has been published by K. Yang, et al2. Pore-size filling mechanism is discovered and discussed in this paper, indicating that pore-size and different substrate relates with molecular selectivity of organic compounds. Ho wever, the mechanism is still not understood. Fluorescence spectroscopy is a straightforward method for studying the adsorption mechanism between guest molecules and MOFs. Yet there are rarely papers studying characterization of adsorption of aromatic compounds in liquid or solid system by fluorescence spectroscopy. It is assumed based on fluorescence spectra that Lewis acid-base interaction promotes the adsorption of pyrene on Al2O3 from model fuel using octane as solvent53. While the fluorescence spectra was collected using a model sorbent aluminum chloride in methanol instead of actual Al2O3 in model fuel, spectroscopic characterization of adsorption complexes formed by MOFs and aromatic compounds or aromatic N-heterocyclic compounds by the fluorescence spectroscopy is still unknown to our knowledge. Another useful characterization method is near-UV/visible diffuse reflectance spectroscopy (DRS), which is excellent at detecting the variation or shift in electronic states on adsorption complexes forming by metal sites and guest molecules. The DRS was used to identify the interactions between aromatic amines and MOFs54 but it has not been used to explore the interactions between metal sites of MOFs and guest molecules as aromatic compounds or aromatic N-heterocyclic compounds. Thus, we aim to investigate the adsorption of large aromatic compounds on MOFs using two spectroscopic methods as fluorescence spectroscopy and near-UV/visible diffuse reflectance spectroscopy. 1.8 Adsorption of Aromatic Compounds and Aromatic N-heterocyclic compounds on microporous MOFs without CUS: MIL-53 and A100 M. Maes and his colleagues have studied the adsorption of indole and methyl-substituted indole present in model fuel (heptane/toluene at either 80 vol. %/20 vol. % or 20 vol. %/80 vol. % combination) at initial concentration of 0.15 M on thermally activated MIL-53 (Al)9. The amount of absorbed indole intensively dropped in model fuel with toluene, which indicates a possible competitive adsorption. While no data of adsorption capacity for indole and substituted indole on MIL-53 (Al) in n-alkane solvent was reported, not enough experimental evidence or computational evidence can be used to prove the mechanism of competitive adsorption. Similarly, adsorption of indole, pyridine, pyrrole and quinolone on thermally activated MIL-53 (Al) has been studied in another paper. In this paper n-octane was used as solvent, however, no data for adsorption capacity of indole on MIL-53 (Al) has been reported55. Ï€-Ï€ interactions is suggested to be the major force that introduce the adsorption of indole or quinolone onto activated MIL-53 (Al), but no experimental evidence was given55. At the present time, no direct spectroscopic characterization of chemical bonds between aromatic or hetero-aromatic adsorbate and MIL-53 has yet been reported. Furthermore, adsorption of naphthalene on MOFs has not been reported to our knowledge. To investigate the adsorption mechanisms through fluorescence spectroscopy, it is essential to know the origin of the fluorescence from MOF itselft. It was discussed in a review paper by M. Allendorf, C. Bauer, R. Bhakta et al.56, that there are five modes for generating fluorescence in MOFs: linker-based, framework metal ions (charge transfer between linker and metal), adsorb

A Comparison of Love in Jane Eyre and Wide Sargasso Sea Essay -- compa

Love in Jane Eyre and Wide Sargasso Sea      Ã‚   In the passages presented below, both narrators are soliciting affection and love. For Jane, in Jane Eyre by Charlotte Bronte, her mother figure, Aunt Reed, shows absolutely no affection towards her niece. Coldly, Ms. Reed regards Jane only as a bothersome child she was left to raise. Similarly, Antoinette, in Jean Rhys's Wide Sargasso Sea, is raised disregarded and unloved by her mother Annette. Although shunned, Jane and Antoinette both have the passion and willingness to love. However, it is the paths their lives took that characterizes the way they chose to deal with life's uncertainties.    "My disposition is not so bad as you think: I am passionate, but not vindictive. Many a time, as a little child, I should have been glad to love you if you would have let me; and I long earnestly to be reconciled to you know; kiss me, aunt."    I approached my cheek to her lips; she would not touch it. She said I oppressed her by leaning over the bed; and again demanded water. As I laid her down--for I raised her and supported her on my arm while she drank--I covered her ice-cold and clammy hand with mine; the feeble fingers shrank form my touch-the glazing eyes shunted my gaze...    Poor, suffering woman! It was too late for her to make now the effort to change her habitual... ...unned by her mother. She was simply incapable of trying to achieve it.    Works Cited and Consulted: Bronte, Charlotte. Jane Eyre. New York: Dodd, Mead & Company, 1991 Ciolkowski, Laura E.. "Navigating the Wide Sargasso Sea ¨ Twentieth Century Literature. Vol 43. 3. 1997:125-140. Gates, Barbara Timm, ed. Critical Essays on Charlotte Bronte. Boston: G. K. Hall, 1990. Howells, Coral Ann. Jean Rhys. New York: Harvester Wheatsheaf. 1991. Macpherson, Pat. Reflecting on Jane Eyre. London: Routledge, 1989. Rhys, Jean. Wide Sargasso Sea. London: Penguin, 1968. Wyndham, F. Introduction. Wide Sargasso Sea. By Jean Rhys. London: Penguin, 1996. 1-15. A Comparison of Love in Jane Eyre and Wide Sargasso Sea Essay -- compa Love in Jane Eyre and Wide Sargasso Sea      Ã‚   In the passages presented below, both narrators are soliciting affection and love. For Jane, in Jane Eyre by Charlotte Bronte, her mother figure, Aunt Reed, shows absolutely no affection towards her niece. Coldly, Ms. Reed regards Jane only as a bothersome child she was left to raise. Similarly, Antoinette, in Jean Rhys's Wide Sargasso Sea, is raised disregarded and unloved by her mother Annette. Although shunned, Jane and Antoinette both have the passion and willingness to love. However, it is the paths their lives took that characterizes the way they chose to deal with life's uncertainties.    "My disposition is not so bad as you think: I am passionate, but not vindictive. Many a time, as a little child, I should have been glad to love you if you would have let me; and I long earnestly to be reconciled to you know; kiss me, aunt."    I approached my cheek to her lips; she would not touch it. She said I oppressed her by leaning over the bed; and again demanded water. As I laid her down--for I raised her and supported her on my arm while she drank--I covered her ice-cold and clammy hand with mine; the feeble fingers shrank form my touch-the glazing eyes shunted my gaze...    Poor, suffering woman! It was too late for her to make now the effort to change her habitual... ...unned by her mother. She was simply incapable of trying to achieve it.    Works Cited and Consulted: Bronte, Charlotte. Jane Eyre. New York: Dodd, Mead & Company, 1991 Ciolkowski, Laura E.. "Navigating the Wide Sargasso Sea ¨ Twentieth Century Literature. Vol 43. 3. 1997:125-140. Gates, Barbara Timm, ed. Critical Essays on Charlotte Bronte. Boston: G. K. Hall, 1990. Howells, Coral Ann. Jean Rhys. New York: Harvester Wheatsheaf. 1991. Macpherson, Pat. Reflecting on Jane Eyre. London: Routledge, 1989. Rhys, Jean. Wide Sargasso Sea. London: Penguin, 1968. Wyndham, F. Introduction. Wide Sargasso Sea. By Jean Rhys. London: Penguin, 1996. 1-15.

Lakota Woman Essay -- American History

Lakota Woman The book â€Å"Lakota Woman,† is an autobiography that depicts Mary Crow Dog and Indians’ Lives. Because I only had a limited knowledge on Indians, the book was full of surprising incidents. Moreover, she starts out her story by describing how her Indian friends died in miserable and unjustifiable ways. After reading first few pages, I was able to tell that Indians were mistreated in the same manners as African-Americans by whites. The only facts that make it look worse are, Indians got their land stolen and prejudice and inequality for them still exists. Just like other Indian kids on reservation, Crow Dog’s childhood was poor in everyway; didn’t have enough food, clothes, education, and parents’ love. She was kidnapped to boarding school where Indian children are imp...

Executive Support System

Executive Support Systems (ESS) †¢ supply the necessary tools to senior management. The decisions at this level of the company are usually never structured and could be described as â€Å"educated guesses. † Executives rely as much, if not more so, on external data than they do on data internal to their organization. Decisions must be made in the context of the world outside the organization. The problems and situations senior executives face are very fluid, always changing, so the system must be flexible and easy to manipulate. The Role of ESS in the Organization Executives often face information overload and must be able to separate the chaff from the wheat in order to make the right decision. On the other hand, if the information they have is not detailed enough they may not be able to make the best decision. An ESS can supply the summarized information executives need and yet provide the opportunity to drill down to more detail if necessary. †¢ As technology adva nces, ESS are able to link data from various sources both internal and external to provide the amount and kind of information executives find useful. As common software programs include more options and executives gain experience using these programs, they're turning to them as an easy way to manipulate information. Many executives are also turning to the Web to provide the flexibility they need. Benefits of ESS †¢ As more executives come up through the ranks, they are more familiar with and rely more on technology to assist them with their jobs. Executive Support Systems don't provide executives with ready- made decisions. They provide the information that helps them make their decisions. Executives use that information, along with their experience, knowledge, education, and understanding of the corporation and the business environment as a whole, to make their decisions. Executives are more inclined to want summarized data rather than detailed data (even though the details must be available). ESS rely on graphic presentation of information because it's a much quicker way for busy executives to grasp summarized information †¢ †¢ †¢ †¢ †¢ †¢ Simple for high-level executives to use Operations do not require extensive computer experience †¢ Provides timely delivery of company summary information †¢ Provides better understanding of information †¢ Filters data for better time management †¢ Provides system for improvement in information tracking Disadvantages †¢ Computer skills required to obtain results †¢ †¢ Requires preparation and analysis time to get desired information †¢ †¢ Detail oriented Provides detailed analysis of a situation †¢ †¢ Difficult to quantify benefits of DSS How do you quantify a better decision? †¢ Difficult to maintain database integrity †¢ †¢ Provides only moderate support of external data and graphics capabilities Examples of ESS †¢ The Sutter Home Winery uses mostly external data, including information from the Internet, in its ESS. It organizes the information in order to help executives make decisions based on trends in th e marketplace. The information includes data on competitors and information from market research. Sutter uses its system output to determine sales forecasts, marketing campaigns, and investment plans. Managers at the Royal Bank of Canada are able to choose their own criteria (from among 15 choices) to drill down and navigate data through easy-to-use interfaces. They don't have to accept data in formats chosen by someone else who may not understand individual manager's needs. Data analysis is more timely because the information is quicker to obtain and more convenient than before. †¢ Characteristics of ESS †¢ †¢ †¢ †¢ †¢ †¢ †¢ †¢ Degree of use High, consistent, without need of technical assistance Computer skills required Very low -must be easy to learn and use Flexibility High – must fit executive decision making style Principle use Tracking, control Decisions supported Upper level management, unstructured Data supported Company internal and external Output capabilities Text, tabular, graphical, trend toward audio/video in futur e Graphic concentration High, presentation style Data access speed Must be high, fast response ESS Applications †¢ †¢ †¢ †¢ Manufacturing Medical Government Financial summary †¢ Executive Support Systems meet the needs of corporate executives by providing them with vast amounts of information quickly and in graphical form to help them make effective decisions. ESS must be flexible, easy to use, and contain both internal and external sources of information