World Heritage Analysis (Ilocandia) Essay Example for Free

World Heritage Analysis (Ilocandia) Essay Directions: Considering the World Heritage Sites you will visit in the Ilocos Region (Church of San Agustin in Paoay , La Asuncion dela Nuestra Senora in Sta. Maria, Ilocos Sur and the Historic Town of Vigan) find answers to the following questions by observing, interviewing, researching, etc. 1. What makes the Ilocandia a World Heritage Site? Vigan represents a unique fusion of Asian building design and construction with European colonial architecture and planning. Criterion (iv): Vigan is an exceptionally intact and well preserved example of a European trading town in East and South-East Asia. 2. What are the threats that face the world heritage sites? Natural threats such as earthquake, natural decay, tidal waves and typhoons might affect or damage the World Heritage Site in Ilocandia because most of them are cultural heritage. 3. What brings about the successful preservation of these world heritage sites? First objective: Fortify the sense of identity and pride of the community on their historic city. Second objective: To institutionalize local protective measures and development plans to ensure continuity of programs and involvement of stakeholders. Third objective: Forge local and international linkages. Fourth objective: Develop Vigan as a tourist destination where tourism programs enrich and conserve the people’s core values and traditions, as well as sustain livelihood and employment for bigueà ±os. 4. What is protected in the world heritage sites? They are protecting the historical significance and/or value of the cultural heritage sites (ancestral buildings and some of the Baroque churches in the Philippines) and the history and culture that it has left. 5. How are world heritage sites protected? What protection measures do they follow? (Localized your answers based on your local findings) a. An ordinance defining the boundaries of the protected historic district specifying the core and buffer zones. b. An ordinance providing the general conservation guidelines for Vigan ancestral houses and specifying the compatible uses of structures within the historic district. c. An executive order creating a multi-sectoral Vigan conservation council to promote involvement of local stakeholders. This council serves as a clearing house for all d. applications for building permits within the historic district. Clear-cut and specific steps in securing permits for house restorations were designed. e. An ordinance enacting the Vigan conservation code prescribing detailed guidelines for conservation of Vigan ancestral houses. f. An ordinance providing a yearly allocation of one percent of Vigan’s internal revenue allotment for arts, culture and tourism. 6. What impacts the presence of visitors have on world heritage sites and the host community? Through their conservation program, Vigan’s traditional industries continue  to fuel the economy and provide employment opportunities to the residents. With an annual income of 800,000 dollars in 1995, it grew over the years reaching our current income of 4.2 million dollars. The added revenues enable us to deliver basic services. 7. What steps are adopted in order to influence and encourage visitors toward adopting responsible behavior during their visit (and even afterwards)? Unlike in El Nido, Palawan, I have not seen nor heard that Ilocandia has their code of conduct for their visitors. Because, in truth it is into the visitor’s common sense to respect this world heritage sites. 8. Do they have codes of responsible conduct for visitors at heritage sites? How are they used? There is a signage in Paoay Church not only indicates visiting schedules but also regulations requesting people to behave in a responsible and civilized manner. This move is reflective of how people vandalize important monuments, even places of worship. The signage talks about dress codes, off-limit areas and even warns people from urinating along the side of the church between the buttresses. 9. How does the local organization enhance the quality of visitors’ experience? Last year, August 2010, Ilocos Norte Governor, Imee Marcos presented Norte Tourism Master Plan, they are aiming for an airport-driven urban development. I guess their main target is tourists from other countries. The governor also promoted through national media the Sand dune adventure in Suba. 10. How can the quality of heritage visitation be improved at the World Heritage Sites? They have provided ready access of information in Vigan for the local and international community through website. They also revitalized existing people’s organizations and encouraged the creation of new ones to become active partners in the transformation of their community. 11. What are the visitor problems they encounter at the World Heritage Sites? The problems that they encounter with the visitors or guests are minimal, for example, whenever visiting a museum or an old house, there is a signage that reads â€Å"Do not touch† or â€Å"Do not sit† simple problems. 12. What are the Top 5 characteristics of a great experience at these World Heritage Sites? 5th is that feeling when before I only saw it in a picture but at that particular time, I have seen in built right there, with my own eyes. :)4th hearing Ma’am Tina talk about everything she knows about those places, the shock, awe, and the knowledge that I gain. 3rd Is that I have heard how they speak, the local folks, tasted their food, watched how they cook, just simply observing them, their culture and trying to see the differences that the Ilocanos and Capampangan has.2nd When I was there, I felt and thought, like, â€Å"how did they survived the Spanish colony back then?† It is like at that moment I wished to go back in time. And 1st is that I have laid my foot on the floor of those places which are part of the World Heritage Sites. 13. How do the local people in the area help to protect the heritage values of these World Heritage Sites? There was a popular movement among community members to have the ancient status of Vigan as a city restored. In the plebiscite of January 22, 2001, â€Å"An act validating and recognizing the creation of the City of Vigan by the Royal Decree of September 7, 1758 issued by King Fernando VI of Spain† it was ratified by an overwhelming 93% affirmative votes. 14. What tourism services are offered to the visitors? Tourism services such as accommodation (hotels and restaurants), recreation services (Pagudpud beach, Sand dunes in Suba) travel agencies and/or tour operator services, tourist guide services, and other related services. 15. Why are these World Heritage places important? Heritage sites in Ilocos Sur and Norte (Vigan Heritage Village, Paoay Church, Sta. Maria Church) are important places for it stand as passive witnesses to the major events in Philippine history. These are not only beautiful landmarks but also monuments that mark time. The two churches symbolize the  need to protect religious places by the way the Spaniards built massive structures even if it took them many years to finish. The following definitions of social, aesthetic, historic and scientific values are from the Australia ICOMOS Charter for the Conservation of Places of Cultural Significance (the Burra Charter) (1992) and the Draft Guidelines for the protection and management and use of Aboriginal and Torres Strait Islander cultural heritage places (1998). The definitions of biological diversity, ecosystems and geological values are from the Australian Natural Heritage (7 charter standards and principles for the conservation of places of natural heritage significance (1996). SOCIAL VALUES Social value to the community embraces the qualities for which a place is a focus of spiritual, traditional, economic, political, national or other cultural sentiment to the majority or minority group. * Is the place important to the community as a landmark or local signature? In what ways, and to what extent? Both, but they see the place more as a landmark than a local signature. Because the local people are still trying to preserve the history that the place, particularly the World Heritage Sites, conveys. * Is the place important as part of community identity? In what ways, and to what extent? Yes, Vigan is known for it shows the remains of what has happened in the past (history) and observing the community there, I noticed that unlike here in Angeles, or in any other cities, they are a bit conservative, maybe because they still possess the â€Å"Dalagang Pilipina† identity. And they are proud to be Ilocanos, Mrs. Angel Alvarez-Lao would be a very great example. * Is the place important to the community because an attachment to it has developed from long use? What is the length and strength of that attachment? Yes, because they benefit from the place because it is visited by tourists  from all over the world. And at the same time, maybe, because of that significant place a culture might have evolved. They are tightly attached to it, when I got there I have seen long lines of souvenir shops, an evidence of the pride they have as part of that community. * Which community values the place? The whole community values the place, because the local government has made several ordinance and the local people followed suit. A proof that they approve of the beatification of their community. * What is the relative importance of the place to the group or community (compared to other places important to it)? The place is important to them because aside from they get something from it, their tradition, culture, and their language was made through the past which the place represents. * Is the place associated with a particular person or group important in your community’s history? What is the importance of the association between this place and that person or group? There are a lot of important persons who grew up or stayed in this land. The second President of the Republic of the Philippines was born in Ilocos, as well as former President Ferdinand Marcos. Both of them have done good things for their region, especially Marcos. * Is the place valued by a community for reasons of religious, spiritual, cultural, educational or social associations? In what ways, and to what extent? Yes, in terms of religion Ilocos is known for the Baroque churches that were built there during the Spanish era. Culturally, yes, because these places represents how some/most of their traditions and cultures were made. Educationally, yes, Ilocos is known nationally for its beauty and especially  the stories behind those beautiful places. Socially, of course, for they meet a lot of people in their everyday lives. AESTHETIC VALUES Aesthetic value to the community includes aspects of sensory perception (sight, touch, sound, taste, smell) for which criteria can be stated. These criteria may include consideration of form, scale, colour, texture and material of the fabric or landscape, and the smell and sounds associated with the place and its use. * Does the place have natural or cultural features which are inspirational or evoke strong feelings or special meanings? What are those features, and to what extent are they evocative? Is the place a distinctive feature that is a prominent visual landmark? In terms of cultural features Ilocos has the Baroque churches and of course the Vigan Heritage Village, as I’ve said many times now, it does have special meaning not only to the locals but also to every Filipino, for they are the witnesses of what has happened in the past. Yes, it is a landmark, people outside the country knows Ilocos because of this World Heritage sites. * Does the place evoke awe from its grandeur of scale? To what extent is this important? Yes it does, it would not be part of the World Heritage list if it is not. It is important that they would really have to preserve so that its grandeur would be maintained. * Does the place evoke a strong sense of age, history or time depth? How does it do this, and to what extent? It does, it is like when you look at it, you went back in time when the Spanish colony was reigning. The structure is still the same; the only difference is that it obviously looks old. Yet, its beauty still remains. * Is the place symbolic for its aesthetic qualities? Has it been represented in art, poetry, photography, literature, folk-art, folklore mythology or other imagery? The place has its aesthetic qualities, the genuineness and originality of this site is still intact to it. It has been showcased in different museums, the photographs as well as paintings of the Paoay Church, Vigan Heritage Village, and the Sta. Maria Church. * Does the place have outstanding composition qualities involving any combinations of color, form, texture, detail, movement, unity, sounds, scents, spatial definition and so on? To what extent is this important? The three heritage sites which can be  found in Ilocos Sur and Ilocos Norte possesses outstanding combination qualities such as its form, texture, and details, the architectural design of this three are known for it is unique structure. HISTORIC VALUES Historic value to the community encompasses the history of aesthetics, science and society, and therefore could be used to encompass a range of values. A place may have historic value because it has influenced, or has been influenced by, an historic figure, event, phase or activity. It may be the site of an important event. History can describe the ‘story’ of a place or its people and can apply to any period, though not usually the current period. * Is the place important in showing patterns in the development of the history of the country, State or Territory where your community lives or a feature of your local area? How does it show this? It shows the development of the history of the country, yes, before the Philippines is under the Spanish colony, but currently the Philippines is an independent (not really though) and democratic country, in this way I could say yes. * Does the place have indigenous plant species that have historic significance? The name Vigan was derived from Biga, a giant taro plant that grows abundantly along the banks of the Mestizo River. Another one is tobacco, in the past there had been a tobacco monopoly, it was only after 100 years King Alfonso XII lifted the tobacco monopoly. This has been part of their history, and until now they continuously harvest tobacco. * Does the place show a high degree of creative or technical achievement? How does it show this? Creative yes, in Vigan, the architectural structures of the fast-food chains (found in the last page) resembles the old houses in Vigan. Technically too, Bangui Windmills which can be found in Pagudpud, Ilocos Norte had done a great job to the local people, they can get free power supply through this windmills. * Does the place have geological features that have historic significance? There is, Mrs. Lao told us a story that she had been trying to prove it was a research by his late grandfather Emilio Alvarez. The sunken village of Paoay lake (San Juan Village) said to sink because of a tremendous earthquake due to the three volcanoes which erupted all at the same time. * Is the place associated with a particular person  or group important in your history? What is the importance of the association between this place and that person or group? It is; this Paoay Lake had been as I have said a research by Mr. Emilio Alvarez, and by the time Ma’am Angel is graduating her thesis was about this sunken village, and she proved that what his late grandfather’s findings were real. * Does the place exemplify the works of a particular architect or designer, or of a particular design style? In what ways, and to what extent? It is the most evident and only surviving example in the Philippines that shows Spanish urban planning of the early 18th century that conforms to the Ley de las Indias that regulates the layout, street patterns, and open spaces of all new settlements planned during the Spanish empire. * Is the place associated with a particular event in the history of your area, or the State, Territory or nation? What is the relationship between this place and those events? In the national history of the Philippines, Vigan has played an important role. It was the center of the Basi Revolt (1807) and the Ilocos Revolt (1762-63) led by Diego and Gabriela Silang. It was the birthplace of Fr Josà © Burgos whose martyrdom polarized the revolution against the Spanish. Other historic personalities are Leona Florentino, the first Filipina poetess be internationally acclaimed. Her son, Isabelo de los Reyes, founded the Philippine labor movement. The Second President of the Philippine Republic, Elpidio Quirino, was born in Vigan. While Sarat, is the birthplace of Ferdinand Marcos, his administration ruled for 20 years. * Does the place demonstrate ways of life, customs, processes, land use or design no longer practiced, in danger of being lost, or of exceptional interest? How does it demonstrate these things? The local people in Vigan still posses their customs, they are actually known to be â€Å"kuripot† and yes they are. After the inscription, the Vigan Conservation Council (VCC) was made. This council conserves and preserves the beauty and integrity of the Vigan Heritage Village. * Does the place exemplify the characteristics of a particular type of human activity in the landscape, including way of life, custom, process, land use, function, design or technique? In what ways, and to what extent? During the Spanish era, yes, but at the present time, somehow it does not. In a way the local people in Ilocos have been urbanized. Their way of life had already changed, though  some still remains. * Does the place reflect a variety of changes over a long time? In what ways, and to what extent? Yes it had, starting from how the houses are built, very far from the unique style before. The Bangui windmills are one of the developments in Ilocos Region. This kind of development is unavoidable and somehow natural and besides this are positive developments. SCIENTIFIC VALUES Scientific value to the community will depend upon the importance of the data involved, on its rarity, quality or representativeness, and on the degree to which the place may contribute further substantial information. * Is the place important for natural values in showing patterns in natural history or continuing ecological, earth or evolutionary processes? In what ways, and to what extent? It is, though Pagudpud beach is not part of the World Heritage List or even in their tentative list, the natural beauty of this island is awesome. Another thing is that Ilocos is near South China Sea. * Is there anything about the place or at the place which is rare or endangered, for example, plant or animal species, geological features, a type of construction method or material used, or a particular form of archaeological evidence? Researchers from Mariano Marcos State University (MMSU) found that 113 plant species in Ilocos Norte are vanishing: 16 vegetables, 31 fruits and forest tree species, 43 ornamentals and medicinals, 7 rootcrops and 16 other plant species. * Is the place important in helping others to understand this type of place? In what ways, and to what extent? Yes, and not just the place but also understanding the culture and the history behind it. Ilocandia is one of the best tourist spots in the country. * Is the place a good example of a particular type of place, that is, undisturbed, intact and complete? Why is this? Pagudpud beach is, according to the locals they are afraid that when the beach might boom or click to the tourists, what happened to Boracay in Aklan might happen to Pagudpud too. This is why in Pagudpud they do not have much of other activities besides boat riding. * Can the place contribute to research understanding of natural or cultural history? In what ways, and to what extent? They can, the local Government of Ilocos have been doing or implementing laws that helps the local people and the visitors towards understanding more of Ilocandia’s natural and cultural  history. * Can the place contribute to scientific understanding of biodiversity or geodiversity? In what ways, and to what extent? Biodiversity yes, Ilocos is not just rich in culture but it is also rich in living species, some of it are even endangered, and has a great possibility of extinction. Knowing this the local government should at least try to look into this and do something about it. SPECIAL VALUES Special values to the community can be considered as part of other values but are particularly important for some places and some communities. * Does the place have important values relating to spiritual beliefs? Yes, in fact two of the Baroque churches in the Philippines that are listed in the World Heritage List can be found in Ilocandia. Spaniards are said to be the one or are the one who brought us the Catholic religion. * Is the place spiritually important for maintaining the fundamental health and well-being of natural and cultural systems? Yes, and not just for the natural and cultural systems, but of course to every Filipino who believes in the works and goodness of Christ. * Are there wilderness or wild river values recognized at the place? No, there is none.

City Pollution Essay Example for Free

City Pollution Essay 1. Describe how the use of a tall smoke stack might improve air quality near a large industrial facility. A taller smoke stack in an industrial area would improve air quality over shorter stacks. At night, when there is a temperature inversion, pollution from shorter stacks can become trapped and cannot rise any higher than the inversion’s top. The only place it can go is to spread out horizontally in all directions. This keeps all the pollutants spewing out of the stack to remain closer to the ground, lowering the air quality. A taller stack, on the other hand, would allow pollution exit above the inversion and disperse downwind. 2. How can topography contribute to pollution in a city or region? Topology can have a great impact on pollution in a region. We tend to build cities down in valleys, not on hills. Above a layer of cold air in the valleys is a warmer layer. This warm layer prevents pollution from rising which creates a layer of smog in the valley. The hills surrounding the valley act as barriers preventing winds from moving in to disperse the pollution. The same polluted air just recirculates in the valley unable to leave. 3. From where do hurricanes derive their energy? What factors tend to weaken hurricanes? Would you expect a hurricane to weaken more quickly if it moved over land or over cooler water? A hurricane’s energy comes from the transfer of both sensible and latent heat from the surface of the ocean. A cluster of thunderstorms must form around an area of low pressure for a hurricane to form. Warm water drives a hurricane, so when it moves over an area of colder water it slows down and begins to decay. A rising wind shear aloft also hinders a hurricanes momentum. Land does weaken more quickly when it makes land fall. The terrain tends to break up its wind movements, slowing it rapidly. Land also helps to suck the moisture out of the storm which further aids in its rapid decay. 4. Where is the Bermuda high located during the summer and fall? How might the path of a hurricane, moving toward the west from Africa, be affected by the Bermuda High as the hurricane approaches the United States? The Bermuda high is located in the North Atlantic Ocean and moves east and west depending on the season. In summer and fall it is located off the eastern coast of the United States, near Bermuda. In spring and winter it moves eastward and then becomes known as the Azores High. In summer and fall when there is a weak Bermuda high, it drives hurricanes up the east coast of the US. When it is stronger and located further westward, it drives hurricanes into Florida or the Gulf of Mexico. 5. How do you think pollutants are removed from the atmosphere? Does this occur quickly or slowly? Trees and plants play a large role in cleaning pollutants in out atmosphere. They trap pollutants in and release clean oxygen for us to breath. Planting more trees in a polluted industrial area can improve local air quality. Other pollutants can be carried by winds and simply settle and seep into the ground. They can also attach to water vapor, which then falls to the ground as precipitation. This is commonly referred to as acid rain. These processes do happen slowly. We, as a planet, are spewing more pollutants in the air than these natural process can handle, which has led to an ever increasing ozone layer. References Ahrens, C. D. (01/2014). Essentials of Meteorology: An Invitation to the Atmosphere, 7th Edition [VitalSource Bookshelf version]. Retrieved fromhttp://online.vitalsource.com/books/9781305439733

Quantitative Determination of Atrazine

Quantitative Determination of Atrazine The objective of this study is to develop a simple and economic spectrophotometric method for the quantitative determination of atrazine. This method is based on the complexation of atrazine derivatization (dechlorinated atrazine [DA]) with a mixture of formaldehyde and ketone compound, as described by Mannich reaction. The complex was determined by UV-Vis absorption measurement and the ketone compound used was the uranine due to its high coefficient absorption. The UV spectrum of the complex shows maxima of absorption at 207 nm and at 227 nm. An internal standard was used to quantify the atrazine. There is a good linearity between the absorbance and the concentration in the range of 0.1 10 ÃŽ ¼g.mL-1 of atrazine. The recovery value was 97 % and the limit of detection was 0.01 µg.mL-1. Real samples collected from irrigation local area were analyzed using this method and the estimated concentration of atrazine found in the mentioned river is 0.29  ± 0.011 ÃŽ ¼g.mL-1. Keywords: Atrazine, dechlorination by zero valent iron, Mannich reaction, Spectrophotometer, quantification, internal standard, real samples measurements. Introduction Atrazine are widely used in agriculture, and their heavy use has resulted in the environmental pollution. Their persistent presence had been a serious problem, especially in surface and ground water systems. Atrazine herbicides were often used especially in Europe and the United States (1, 2), as important atrazine and simazine have been greatly used in maize cultivation and forestry. Their solubility in soil is low, and then can migrate along the food chains, and their intense use and presence in the environment have created a health threat to human beings. Recently, they have been considered as a group to be endocrine disrupting chemicals (3). The European Union Drinking Water Directive sets official regulations on the maximum admissible concentrations in drinking water as 0.1 mg.L-1 for an individual herbicide and 0.5 mg L-1 for total pesticides (4) whereas in surface water the alert and alarm threshold values are typically 1 and 3 mg.L-1 (5). Hence, the development of sensitive a nd economic analytical methods is very crucial for screening the presence and amounts of atrazine and preventing toxicological risks. In general, gas chromatography (GC) and high performance liquid chromatography (HPLC) are the techniques popularly used for the determination of atrazine and simazine (6-9). Gas chromatography-mass spectrometry (GC-MS), amperometric immunosensor, and adsorptive stripping voltammetric determination were developed for the analysis of atrazine and simazine, (10-13). In general, these techniques are expensive and involve time-consuming separation steps. These methods are unsuitable for field testing, for continuous monitoring or for screening high numbers of samples as required in mapping pesticide pollution in time and space. The objective of this work is to analyse the atrazine by a economic and rapid method. The proposed method in this work is based on the dechlorination of atrazine [DA] by zero valent iron powder (ZVIP), according to the reference fourteen (14) and using the [ DA] obtained in the Mannich reaction in order to give rise a by product having an extinction coefficient absorption more intense than atrazine compound. Materials and methods Chemicals and reagents All chemicals and solvents used were of analytical grade or of a higher grade when available. Formaldehyde, hydrochloric acid were purchased from Fisher, (MA, USA). Atrazine was purchased from Rodel-dehein, zero valent iron powder (350 mesh) was purchased from Sigma Aldrich Ultra pure water was prepared using a multi-Q filter system (Millipore, MA, USA). Instruments The UV absorption measurements were performed on a Shimadzu UV- 1650 PC. With 10 mm quartz cells were used for spectrophotometric measurements. The pH values are measured using METTLER TOLEDO pH-meter. Standard Solutions Stock solution of atrazine was prepared into a volumetric flask at a concentration of 10 ÃŽ ¼g.mL-1, 10 mL of this solution were mixed with 20 mL of acidified di-ionized water (pH = 4) and transferred into a flask of 100 mL. 2.5 g of zero valent iron powder were also added into the flask and shacked for 15 minutes. A complete dechlorinatation of atrazine must be achieved according to the previous work (14). This solution was in the Mannich reaction. Calibration Curves Samples for analysis were prepared by mixing uranine , formaldehyde and dechlorinated atrazine solutions. De-ionized water was transferred into each sample to reach a final volume of 10 mL. Calibration curves were built for quantitative measurements using the samples prepared according the table 1. Composition of samples used to build regression curve of the absorbance of the complex obtained by Mannich reaction and atrazine dechlorinated [DA] Internal standard curve addition and Recovery Atrazine dechlorinated was added as an internal standard for the calibration of the measurement, according to the method described in (Muel and Lacroix, 1960; Rima, Lamotte and Joussot-Dubien, 1982) (16, 17). Determination of the pH was done using a Mettler Toledo (OH, USA) pH-meter. Samples for analysis were prepared by mixing 0.5 ml of uranine (10 ÃŽ ¼g.mL-1), 1mL of pure formaldehyde and different volumes of dechlorinated atrazine stock solutions diluted to [0.75 ÃŽ ¼g.mL-1] (1-1.5 -2- 2.5 and 3 mL). De-ionized water was transferred to each sample to reach a final volume of 5 mL. Table 2 describes the preparation of the standard curve. Recovery experiments were performed by standard addition method: 0.15 ÃŽ ¼g.mL-1 of Atrazine dechlorinated was added to samples and percentage of recovery (R%) was calculated as follows: R% = [(Cr-Cf)/Cr] 100 Cr = Real concentration of atrazine in the fortified samples Cf = Concentration of atrazine obtained by the internal standard addition curve River water analysis The water analyzed was collected from River in the north of Lebanon.[agricultural area] 100mL of the polluted water were treated by zero valent iron powder according to the protocol mentioned above. The samples were fortified by solutions of dechlorinated atrazine having an initial concentration of 0.75 ÃŽ ¼g.ml-1 in order to build the internal standard curve. Table 3 summarizes the volumes of different solutions used in the mixtures. Results and Discussion Mechanism of the dechlorination of atrazine Most halogenated hydrocarbons, RX, can be reduced by iron metal. The overall reaction (Equation 1) results in dehalogenation of RX. Three general pathways by which this process may occur have been proposed (Matheson and tratnyek,) (18). The first involves direct reaction of the metal surface, in which case equation (A) alone adequately represents the pathway of reduction. The other two possible pathways do not involve the metal surface directly. Instead, Fe2+ and H2, which are products of corrosion by water, serve as the reductants that are directly responsible for dehalogenation of RX equation B and C. Fe0 + RX + H+ ↔ Fe2+ + RH + X- A 2Fe2+ + RX + H+ ↔ 2Fe3+ + RH + X- B H2 + RX ↔ RH + H+ + X- C More specifically the atrazine can be written as RX ( X = Cl ). With zero valent iron powder in the acidic aqueous solution the chlorine can be replaced by the hydrogen. According the following reaction: Effect of the dechlorination of atrazine on its extinction coefficient absorption. UV absorption spectra of atrazine in aqueous solution (1.5ÃŽ ¼g.mL-1) were recorded and compared to the spectra of the by-product obtained by the treatment of atrazine as shown in figure 1. Atrazine was dechlorination by zero valent iron powder according to the method described by Matheson, L.J et al (18). The extinction coefficient of the atrazine at the 220 nm (maximum of absorption) was estimated the value of 35200 M-1.L; whereas the extinction coefficient of the dechlorinated atrazine which give a maximum at 210 nm was found equal to 169000 M-1.L. Figure 1. The experimental observations revealed that by the removal of the chlorine atoms an hyperchromic and hypsochromic effects were observed. An increasing of the extinction coefficient and a blue shift from 220 nm to 210 nm of the maximum of absorption were detected. According to the table 4 , the proton that accompanies the formation of the free amine in Equilibrium 1 is available to protonate other reactants in the solution (Equilibria 2 and 3). Addition of the free amine to a protonated molecule of formaldehyde leads to the formation of the iminium ion shown at the right of (Equilibria 4). The enol of acetone then adds to the carbon atom of the iminium ion in (Equilibrium 5). In the equilibrium 1 as shown in the table 1, the nitrogen is enriched by electrons of the CH3 group and this nitrogen will react with H+ as base/acid reaction. However, when the electrons of the nitrogen, are deprived under the influence of the electron affinity of chlorine, this nitrogen will lose its basic character, then the à ©quilibre1 should be disturbed .In the other hand the nitrogen of the Equilibrium 4 play a nucleophilic role and ,if this nitrogen is disadvantaged by a chlorine attractive effect; it will lose the nucleophilic characteristics and the reaction with the carbon of the aldehyde in the Equilibrium 4. cannot be obtained In the case of atrazine it well known that the chlorine plays the role of the electrons donor to the nitrogen of the cycle and the electrons attractive of the aliphatic nitrogen. Since the Mannich reaction must take place at the aliphatic nitrogen not at the aromatic nitrogen and when the chlorine was removed by dechlorination process, the electrons at the aliphatic nitrogen become more dense and then it will be more able to play the role of nucleophilic atoms as mentioned in Mannich reation. In conclusion when the chlorine is removed from atrazine, the Mannich reaction can be observed as we demonstrated experimentally. Identification of the complex obtained in the mixture atrazine dechlorinated-formaldehyd and uranine The Mannich reaction is an organic reaction which consists of an amino alkylation of an acidic proton placed next to a carbonyl functional group with formaldehyde and ammonia or any primary or secondary amine. The final product is a ÃŽ ²-amino-carbonyl compound also known as a Mannich base. Reactions between aldimines and ÃŽ ±-methylene carbonyls are also considered Mannich reactions because these imines form between amines and aldehydes. Equation D (15). We hypothesized that the reaction between uranine, formaldehyde and dechlorinated atrazine must be similar to reaction E. The mechanism of the reaction is the following: Equation E Atrazine compound presents a UV spectrum with a maximum absorbance at 220 nm whereas dechlorinated atrazine presents a maximum of absorption at 210 nm Spectra of atrazine and dechlorinated atrazine are presented in Figure 1. The mixture of dechlorinated atrazine, formaldehyde and uranine give rise to the formation of a complex described by the Mannich reaction. It is obviously that formaldehyde does not have any UV spectrum. The UV spectra of the complex give rise to a spectrum with two maxima at at 207 nm and 227 nm respectively. Figure 2 presents the spectra of atrazine. dechlorinted atrazine and the complex obtained by Mannich reaction. Atrazine 2 ÃŽ ¼g.ml-1 (A) (DA  : dechlorinated atrazine by zero valent iron powder), (DA+ H2CO : dechlorinated atrazine by zero valent iron powder with formaldehyde) (DA+ H2CO + uranine : : dechlorinated atrazine by zero valent iron powder with formaldehyde) Regression curve between the complex formation A calibration curve of the complex was built to examine the linearity of the complex absorbance and atrazine concentrations. The least square method was used to calculate the regression equation. A strong linear correlation was obtained between the absorbance of the complex and the concentrations of atrazine. Figure 4 shows the regression curve of complex absorbance in function of atrazine concentrations. Correlation coefficients were higher than 0.99 in a concentration range of 0.15 ÃŽ ¼g.mL-1 to 0.75ÃŽ ¼g.mL-1.The precision of the method was evaluated with relative standard deviations (RSD) of atrazine determination in five samples. RSD was 3 %. The limit of detection of the method was 0.01 µg.mL-1 as defined by a signal-to-noise ration of 3:1 (19). Spectrophotometric method for quantification of atrazine e using the internal standard addition model A spectrophotometric method using the internal standard addition was examined to quantitatively determine melamine concentrations in samples. A calibration curve was described by the following equation: A*= aC + b, which is equivalent to A* = (A0* /C0) x Cadd + A0*, with A* = (A/ A0) normalized absorbance intensity (arbitrary values), is equal to the ratio of the absorbance intensity after adding the internal standard A to the absorbance intensity before adding the internal standard (A0) C0: solute concentration to be estimated. C0 is determined by the negative intercept of the curve with the abscissa axis (16, 17). A0*: normalized absorbance intensity of the starting solution Cadd: known added concentrations. The plot of A* vs. Cadd is shown in Figure 5. The internal standard used in this method was the atrazine that we would like to determine (C0). To this initial solution, different known concentrations (Cadd) were added. The average recovery for five samples spiked with melamine as described above in Table 1 was estimated to be 97%  ± 3. Table 5 summarizes the validation parameters of this method. Spectrophotometric method for the quantification of atrazine in a sample taken from an agricultural zone, using the internal standard method. Samples taken from a water source contaminated with atrazine, are processed by zero valent iron powder for the dechlorination of atrazine molecules. A definite volume of this solution is mixed with the same concentrations of formaldehyde and uranine. Different volumes of standard solution of dechlorinated atrazine were added to the solutions to be analyzed. The composition of these solutions are summarized in Table 3. The UV-Vis spectra of the solutions were recorded to follow the evolution of the complex obtained after the mixture called Mannich mixture. Using the evolution of UV-Vis spectra, an internal standard curve could be constructed and the intersection of this curve with the axis of abscises gives the concentration of atrazine in the waters of Agriculture . The concentration of atrazine in these waters is estimated at 0.29 ± 0.011 ÃŽ ¼g.mL-1 (n = 5). Conclusion The spectrophotometric method used to analyse the atrazine in agriculture water was based on Mannich reaction .This new method is a specific and simple method for the quantitative determination of atrazine in the contaminated water. Often the determination of atrazine is measured by sophisticated and expensive methods like HPLC, GC/MS. However the proposed method is easy to use, rapid and economic and it showed high accuracy, but it was restricted by the potentiality of the spectrophotometer which reaches a limit of detection of 0.01 ÃŽ ¼g.mL-1 as described in the manuscript.

Transportation And Community D :: essays research papers

Transportation affects every aspect of our lives and daily routine, including where we live, work, play, shop, go to school, etc. It has a profound impact on residential patterns, industrial growth, and physical and social mobility. Roads, highways, freeways and mass transit systems do not spring up out of thin air. They are planned. Someone makes a conscious decision to locate freeways, bus stops, and train stations where they are built. Transportation is no less a civil rights and quality of life issue. Safety and accessibility are the most significant considerations in transportation planning. Zoning and other practices of exclusion result in limited mobility for poor people and those concentrated in central cities. Over the past decades, automobile production and highway construction have multiplied, while urban mass transit systems have been dismantled or allowed to fall into disrepair. The end result has meant more pollution, traffic congestion, wasted energy, urban sprawl, residential segregation, and social disruption. All communities have not received the same benefits from transportation advancements and investments. Some of the governmental policies in housing, land use, environment, and transportation may have even contributed to and exacerbated social inequities. Some communities accrue benefits from transportation development projects, while other communities bear a disproportionate burden and pay cost in diminished health. Generally, benefits are more dispersed, while costs or burdens are more localized. Having a multi-lane freeway next door is not a benefit to someone who does not even own a car. The automobile-oriented construction and infrastructure projects cut wide path through low-income and destitute neighborhoods, physically insolated residents from their institutions and businesses, disrupted once-stable communities, displaced thriving businesses, contributed to urban sprawl, subsidized infrastructure decline, created traffic gridlock, and subjected residents to elevated risks from accidents.   Ã‚  Ã‚  Ã‚  Ã‚  Transportation is critical to healthy, livable and sustainable urban and rural communities. The transportation system influences, and in turn is influenced by, economical development decisions, land-use patterns, real estates investment decisions, and energy consumption patterns of the public and private sectors. The interests of those making transportation decisions, middle and upper class, educated professionals primarily, are served, while the interests, perspectives and needs of people left out of the decision-making process, people of color, poor, working and transit-dependent people, are not. The value of social justice and ecological sustainability are not major priorities in the existing transportation system.   Ã‚  Ã‚  Ã‚  Ã‚  Poor people and people of color are subsidizing our addiction to the automobile. They pay the highest social, economic and environmental costs and received the fewest benefits from an automobile-dominated transportation system. Transportation And Community D :: essays research papers Transportation affects every aspect of our lives and daily routine, including where we live, work, play, shop, go to school, etc. It has a profound impact on residential patterns, industrial growth, and physical and social mobility. Roads, highways, freeways and mass transit systems do not spring up out of thin air. They are planned. Someone makes a conscious decision to locate freeways, bus stops, and train stations where they are built. Transportation is no less a civil rights and quality of life issue. Safety and accessibility are the most significant considerations in transportation planning. Zoning and other practices of exclusion result in limited mobility for poor people and those concentrated in central cities. Over the past decades, automobile production and highway construction have multiplied, while urban mass transit systems have been dismantled or allowed to fall into disrepair. The end result has meant more pollution, traffic congestion, wasted energy, urban sprawl, residential segregation, and social disruption. All communities have not received the same benefits from transportation advancements and investments. Some of the governmental policies in housing, land use, environment, and transportation may have even contributed to and exacerbated social inequities. Some communities accrue benefits from transportation development projects, while other communities bear a disproportionate burden and pay cost in diminished health. Generally, benefits are more dispersed, while costs or burdens are more localized. Having a multi-lane freeway next door is not a benefit to someone who does not even own a car. The automobile-oriented construction and infrastructure projects cut wide path through low-income and destitute neighborhoods, physically insolated residents from their institutions and businesses, disrupted once-stable communities, displaced thriving businesses, contributed to urban sprawl, subsidized infrastructure decline, created traffic gridlock, and subjected residents to elevated risks from accidents.   Ã‚  Ã‚  Ã‚  Ã‚  Transportation is critical to healthy, livable and sustainable urban and rural communities. The transportation system influences, and in turn is influenced by, economical development decisions, land-use patterns, real estates investment decisions, and energy consumption patterns of the public and private sectors. The interests of those making transportation decisions, middle and upper class, educated professionals primarily, are served, while the interests, perspectives and needs of people left out of the decision-making process, people of color, poor, working and transit-dependent people, are not. The value of social justice and ecological sustainability are not major priorities in the existing transportation system.   Ã‚  Ã‚  Ã‚  Ã‚  Poor people and people of color are subsidizing our addiction to the automobile. They pay the highest social, economic and environmental costs and received the fewest benefits from an automobile-dominated transportation system.

The American Family Association :: Exploratory Essays

The American Family Association A simple observation of television commercials between segments of a sitcom can find many aspects of life that our founding fathers worked to eliminate. Those who laid the building blocks for this country built it with trust in God. They wanted to build a country based on the Bible. In today’s society, that goal is no longer a priority, and violence and sex are seen each and every day. However, there is one group that is working to re-establish these morals in today’s society. The American Family Association, or AFA as it is referred to, believes that the entertainment industry has played a significant role in the deterioration of the values on which our country was founded and which keep our families and society as a whole strong. As stated on the homepage, the American Family Association, founded in 1977 by Don Wildmon, is a non-profit organization that represents and stands for traditional family values, focusing primarily on the influence of television and other media on our society. The mission statement of the AFA gives a summation of their purpose: â€Å"The American Family Association exists to motivate and equip citizens in the culture to reflect Biblical truth (AFA Online).† The AFA believes that God has communicated the absolute truth to man through the Bible and that each person is subject to God’s authority at all times. The AFA trusts that a society based on Biblical truth best aids the well-being of a culture, and reflects the vision of our country’s founding fathers. The group believes in holding companies accountable for attacks on traditional family values, as well as approving companies who are responsible for the programs which they support. The American Family Association was organized in an indirect manner. As stated in the AFA homepage, President Don Wildmon tells about the group’s formation in his own words: One evening in 1977 I sat down with my family to watch TV. On one channel was adultery, on another cursing, on another a man beating another over the head with a hammer.

1940-1949 Essay -- Essays Papers

1940-1949 In the United States during the 1940’s, people were getting restless about the war. At the beginning of the 40’s, before the war started, life was pretty much normal and people were talking about how there might be a war. Finally, when the war began, life changed for most Americans. Men were enlisted and drafted to war. Women stayed home and worked numerous jobs to support their family. Industry slowed down so production of weapons, etc. could be produced and shipped to the war. Rationing had to be used so there would be enough food, water, etc. for people to use. It was a change for all people. During the 40’s, especially during the war times, Women had to play the role as mother and father. They had to carry on jobs their husbands used to do, maintain the household environment, and in some cases played baseball to keep the economy up and keep people happy. According to the book, American Decades, by Victor Bond, the war was what brought the country out of depression. The pressure to prepare and produce goods from for the war was enough to jump-start the economy. After the war, the economy kept booming and people were finally getting their lives back together. The beliefs and values in the United Sates were basically to live for the war, and deal with it. There wasn’t much else that could be done. People had husbands, brothers, sons, nephews, etc. entering the war. It took the effort of many Americans to stabilize their lives so that the war wouldn’t bring them down. After the war however, the attitude in the country was very optimistic. People wanted to go to school and get an education. Industry took off again and people were back to their normal lives. Many couples had children. This craze of births is known... ...among blacks. Literature was influenced and art moved to an abstract expressionistic style. The economy grew and America began to regain its strength and power, and used it to grow. The 1940’s, what an amazing time in history. Works Cited Bond, Victor. American Decades, 1940-1949. Gale Research Inc. 1995 Williams, Neville. Chronology of World History, "The Modern World" 1901-1998. Volume IV. Helicon Publishing Limited, 1999 The Reader’s Digest. Great Events of the 20th Century. The Reader’s Digest Association Inc. 1997 University of Dayton Archives. Archives Collection, Albert Emmanuel Hall. -"Hallowed Memories" -"University of Dayton, from Nazareth to the new Millennium" 1850-2000. WDG Publishing. www.lovett.org/libraryweb/amstud.htm Perkins, George and Perkins, Barbara. The American Tradition in Literature. 9th Edition. McGraw-Hill. 1999

Book Report (Romeo and Juliet) Essay

Author and His/her Life: William Shakespeare (April 16, 1564-April 23, 1616) was born in Stratford-upon-Avon, England, The United Kingdom. He’s genre are Literature & Fiction, Poetry. He was an English poet and playwright, widely regarded as the greatest writer in the English language and the world’s pre-eminent dramatist. He is often called England’s national poet and the â€Å"Bard of Avon† (or simply â€Å"The Bard†). His surviving works consist of 38 plays, 154 sonnets, two long narrative poems, and several other poems. His plays have been translated into every major living language, and are performed more often than those of any other playwright. Shakespeare produced most of his known work between 1590 and 1613. Overview: The undying love-story of Romeo and Juliet by William Shakespeare is one of his greatest and astonishing works during his times which is still being studied in schools and told every generation. In this story, the two young lovers proved that they are going to love each other no matter what happens or should I say, till death makes them apart. Though everybody is against of their relationship, they did not stop loving each other though Romeo was banished by Juliet’s father and both families have a misunderstanding. I can say that their families wasted a lot of lives including the two young lovers’ lives because they let their egos rule before finding the appropriate solution for the problems of both parties. II. Body A. Characters: Romeo – Son of Montague who falls in love with Juliet. Juliet – A Capulet who falls in love with Romeo. Lord Capulet – Juliet’s father. Lady Montague – Romeo’s mother. Lord Montague – Romeo’s father. Count Paris – A friend of the Prince who wants to marry Juliet. Prince Escalus – Prince of Verona who provides for law and order. Friar Lawrence – The Priest in Verona. He marries Romeo and Juliet hoping it will unite both families. Friar John – Was supposed to deliver a letter to Romeo about Juliet and the Friar’s plan, but Romeo didn’t get it. The Nurse – Cared for Juliet during childhood. Mercutio – A good friend of Romeo. Balthasar – A servant and friend to Romeo. Benvolio – A friend of Romeo’s. Tybalt – Nephew of Lady Capulet. Samson – The Capulet servant. Gregory – He is a Capulet servant. Peter – Servant to Juliet’s Nurse. The Apothecary – A poor shopkeeper who illegally sells poison to Romeo. B. Setting The play is set in the thirteenth or fourteenth century in Italy in Verona and Mantua. Much of the action takes place in Juliet’s house. Two cities of Venice are also mentioned in the play. The Capulets and the Montagues, the main families of the play, are from noble lineage and wealth; they dress well, live in fancy surroundings, and are served by many attendants. The play’s basic setting, therefore, is rich and elegant. C. Plot For many years, an on-going feud between two families has caused much disruption in the city of Verona, Italy. The Capulets and the Montagues cannot seem to get along, and there have been many deaths among the two families because of it. Prince Escalus of Verona warns the two families that if the feud does not stop, the punishment will be death. The stage opens with servants of the Capulet and Montague families. They get into a minor argument. Romeo, a Montague, enters the stage. He has recently been denied the love of Rosaline. He is miserable over this. His friend and cousin, Benvolio, enters and decides that they will go to the Capulet feast, in disguises, so he can prove to Romeo that other pretty women exist. They all exit. At the feast, Romeo meets Juliet, the daughter of Capulet. Instantly, they fall in love. After the feast, Romeo sneaks into the Capulet orchard and visits Juliet. Here, they proclaim their love for each other. They decide to marry the next afternoon and they exit the stage. Romeo and his friend and confidant, Friar Laurence, enter. Romeo seeks the help of Friar Laurence, who agrees to marry Romeo and Juliet, in hopes that the marriage will end the feud between the two families. They exit. Later that afternoon, Tybalt, a nephew of Lady Capulet, enters. He meets Romeo and starts a fight with him, as he is angry that Romeo was at the Capulet feast. Mercutio, a friend of Romeo’s, is angered by Tybalt and challenges him to a duel. Tybalt kills Mercutio, and Romeo in response, kills Tybalt. He quickly flees the scene before he hears that the Prince has exiled him from Verona. All exit. Romeo and the friar enter. Hiding in Friar Laurence’s cell, Romeo tries to commit suicide. The friar will not allow Romeo to take his own life, and convinces him to go and see Juliet to say goodbye to her. Capulet enters and arranges for Juliet to marry Paris in three days. She refuses, but her father says he will disown her if she does not comply. They exit and Juliet enters in the friar’s cell. He gives her a potion that will make it appear as though she is dead. She exits. She reenters the stage (now at home) and agrees to marry Paris. Her father is so delighted with her obedience that he decides to move the wedding up one day, to the very next day (Wednesday). All exit. The next morning, Nurse enters and finds Juliet in her bed, apparently dead. The Capulets all enter with Paris and decide to have a funeral. All exit. Romeo, who is in Mantua, enters. His servant Balthasar enters and tells Romeo that Juliet is dead. Balthasar exits. Romeo doesn’t know that it is a fake death because he never gets the message from the friar. He buys a vial of poison from an apothecary and returns to Verona. Romeo enters at the Capulet tomb and sees Juliet (apparently) dead. Paris, who had entered previously, but had been hiding, recognizes Romeo as a Montague and challenges him. Romeo kills him, drinks the poison he bought, and dies. Just as Juliet wakes up from the potion the friar gave her, the friar enters the tomb. He hears noises and tries to persuade Juliet to leave with him. She refuses, sees Romeo dead next to her, stabs herself with Romeo’s sword, and dies. The Capulets, Montagues, and the Prince of Verona all enter the tomb and wonder what went on. Friar Laurence explains the story, and the Capulets and Montagues agree to end their family feud. D. Imagery and symbols Poison – Obviously it symbolizes how poison ended their love story even how much they wanted to fight for their love. E. Theme and Sub theme Forcefulness of love and Love as a cause of violence III. Conclusion A. Five lives, events/scene that attracted you. Why? 1. Romeo falls in love with Juliet at first sight. Juliet feels the same way about him. 2. Romeo confesses his love for Juliet. 3. Romeo makes arrangements with Friar Lawrence for his wedding to Juliet. 4. Romeo thought that Juliet is dead and then drinks poison. 5. Juliet wakes finding Romeo dead and kills herself and thrusts a sword thorough her body. I find these 5 scenes attracting because it prove how powerful love can be. The 5 lines and give the reason why you are attracted. 1. But soft! What light through yonder window breaks? It is the East, and Juliet is the sun! Arise, fair sun, and kill the envious moon, Who is already sick and pale with grief? That thou her maid are far more fair than she. Romeo, seeing Juliet at her window. He compares her to the sun, light that brightens his dark world. He had previously compared Rosaline to the moon. His love for Juliet, the sun, has risen and killed the feelings he had for Rosaline. 2. My only love, sprung from my only hate! Too early seen unknown, and known too late! Prodigious birth of love it is to me That I must love a loathed enemy. Juliet after the Nurse tells her that Romeo is a Montague. She has already fallen in love with him. The information has come too late to save them from this difficult situation. 3. These violent delights have violent ends And in their triumph die, like fire and powder, Which, as they kiss, consume. Friar Lawrence, warning Romeo to cool down his passion. Moderate love is less likely to lead to disaster than violent love. His warnings prove to be founded. 4. What’s in a name? That which we call a rose By any other word would smell as sweet. Juliet lamenting fact that her love is a member of the family that is a bitter enemy of her own. He is not defined by his name. They would be able to express their love freely if he were called anything else. 5. These violent delights have violent ends And in their triumph die, like fire and powder, Which, as they kiss, consume? Friar Lawrence, warning Romeo to cool down his passion. Moderate love is less likely to lead to disaster than violent love. His warnings prove to be founded. What do you think the novel contribute to you? In What way? It gave me an idea how love conquers all. It made me realize that nothing can stop love unless you, yourself decided to give up. I’ve learned that love builds, it also destroys. Is the novel worthwhile? Would you recommend it to others? Yes, it is worthwhile. I would definitely recommend it to others because people are very affected when they talked about love. This book will show how far you can go; how long you can be strong and how long will you fight in the name of love. What are the things you don’t like in the novel? If you were given a chance, what will you change to make it better? The part that I didn’t like the most is the ending. If I was William Shakespeare, I would make it a happy ending because they did everything to fight for their love. And obviously, people love happy endings. Over all generally what can you say to the novel? Short summary. In Romeo and Juliet, there are many different views of love shown. There is sexual love, romantic love, true love, spiritual love, unrequited love and love at first sight. The selflessness of Romeo and Juliet’s love – their willingness to die for each other, is in deep contrast to the hate between the Capulets and the Montagues. It’s about fighting their love to the fullest. They gave their best just to make their relationship right. They proved that nothing can stop you when you fall in love. It just shows that love is easy†¦ true love is not.