Summary of Benjamin R. Bates. Audiences, Metaphors, and the Persian Essay

Summary of Benjamin R. Bates. Audiences, Metaphors, and the Persian Gulf War - Essay Example The American public was crucial to the Persian Gulf War. A number of communication scholars viewed Bush's actions as critical to acquiring and retaining this domestic public endorsement. However, some appeals that might work wonders with a domestic audience are not likely to be convincing to an international audience. For instance, appeals to American nationalism, American civil religion, or American exceptionalism may work well for an American audience, but are not likely to influence Omani, or Senegalese audiences. Other appeals, though, may persuade both domestic and international constituencies. Appeals that cross audiences are especially important in war rhetoric. Instead of being the persuasion of the whole cosmopolis, international persuasion can be considered the persuasion of opinion leaders that hold power in other states. In constructing persuasive appeals to international opinion leaders, Bush cannot simply speak however one wishes. According to Bates research Bush did four things successfully to persuade international opinion leaders. First, Bush identified appropriate international opinion leaders for persuasion. The Persian Gulf War was framed as a military issue. Therefore, Bush sought to convince the heads of other states to join the American military coalition. Bush also created the manifestation of consultation and dialogue through telephone diplomacy and personal consultations. Con

Corn Cob Leaves Biomass Biosorption Industrial Wastewater Environmental Sciences Essay

Corn Cob Leaves Biomass Biosorption Industrial Wastewater Environmental Sciences Essay Corn cob and corn leaves waste is an affordable adsorbent for the removal of industrial contaminants like heavy metals. The present research work is designed to characterize the biosorption of Cr (III) and Cr (VI) from industrial waste using Corn cob and corn leaves waste biomass. Batch experiments will be carried out for the sorption of Cr (III) and Cr (VI) by using Corn cob, as well as entrapment in Na-alginate polymeric matrix. The effect of important operational parameters such as initial pH, initial metal concentration and contact time will be evaluated. Physicochemical parameters will be determined before and after biosorption and conditions will be optimized. Metal contents before and after biosorption will be analyzed using atomic absorption spectrophotometer (AAS). The morphology of the surface of Corn cob and corn leaves biomass will be observed with a scanning electron microscope (SEM). Results will be analyzed using mean  ± and standard error of mean, to determine the p roper sorption the data will be fitted to equilibrium and kinetic model. INTRODUCTION The treatment of high volumes of wastewater containing low concentrations of pollutants is becoming increasingly important as discharge regulations become more stringent. The treatment and disposal of liquid effluents from leather tanning and textile industries are a serious problem due to their Cr(III) contents (Kotas et al.2000). Although Cr(III) is less toxic than Cr(VI), a cancer-causing agent, Cr(III) may be a toxic metal when present at high concentrations (Blasiak et al.2000). Since heavy metal ions are not biodegradable, they are usually removed from the contaminated water by physical or chemical treatment processes. Conventional treatment methods (precipitation, membrane separation, ion exchange, reverse osmosis and electrolysis etc.) are not often feasible because of high treatment cost, the need for continuous input of chemicals, and the production of toxic sludge (Akar et al. 2006). However these techniques proved ineffective in remaining within Cr(III) discharge limits (1-2mg/dm3) of industrial effluents (Geundi et al 1997). As a result, the use of alternative treatments such as ion exchange, carbon adsorption, membrane filtration, electroseparation, and bioaccumulation has been applied in polishing these effluents (Alves et al 1993). However, such processes may be ineffective and extremely expensive. Bioadsorption, on the other hand, is an emerging technology that also works to overcome the selectivity disadvantages of traditional decontamination pr ocesses. (Unz et al 1996). Biosorption technology is based on the interaction between toxic metals and the binding functional groups on the cell wall structure of the microorganisms or plants. These are mainly composed of polysaccharides, lipids and proteins. Biosorption has recognized as a potential alternative method over the conventional separation techniques. This process utilizes live, dead, pretreated and immobilized forms of biological cells like bacteria, fungi, yeast, algae and agriculture waste as sorbent materials (Gadd, 1990). Removal of heavy metals from wastewaters through adsorption, particularly biosorption, has emerged as an alternative technology. A variety of biomaterials and microorganisms have been explored by researchers for biosorption and bioaccumulation including fungi and agriculture waste materials (Fourest et al 1994). Biosorption may occur actively through metabolism or passively through some physical and chemical processes. A biosorbents immobilization procedure is necessary for the industrial application of biosorption [7].Immobilization of the agriculture waste in some suitable matrix like silica gel, polyurethane or alginate has proved useful in industrial application. The physical entrapment of the agriculture waste inside a polymeric gel in the form of beads is one of the most widely used techniques for immobilization which not only tackles the above problem but also provides mechanical strength, rigidity and porosity characteristics to the biosorbents. Further, the metal can be reco vered from the loaded beads using appropriate desorption techniques, thereby, minimizing the possibilities of environmental contamination (Lu et al 1995). Everywhere in the world corn are cultivated as important crop. Corn is Pakistans third most important cereal after wheat and rice. The use of corn in Pakistan for direct human consumption is declining, but its utilization in the feed and wet milling industry is growing at a much faster pace than anticipated. Currently, sufficient corn is grown in Pakistan for domestic needs and there is neither a surplus nor deficit in corn grain supplies. Currently except potato maize is the most profitable, stable and dependable agricultural crop in Pakistan. (Tariq et al 2010). Corn cob and corn leaves are one of the most plentiful and important agriculture waste in maize cultivation accounts for up to 50% of the total corn seed production. Immature cobs are boiled and eaten as corn on the cob or the grains may be removed and eaten as vegetable, or it may be canned. More mature cobs are roasted. The cobs are used for fuel, smoking pork products, and are also as source for charcoal (Sultana et al. 2007). , c The present study is designed to study the usefulness of immobilized corn cob and corn leaves agriculture waste biomass as a biosorbent for Cr(IIl) and Cr(Vl) from aquous industrial waste from tanneries to evaluate the effect of different experimental variables like pH, initial metal concentration and contact time. After biosorption the morphology of the surface of corn cob and corn leaves biomass with a scanning electron microscope (SEM) will be observed. AIMS AND OBJECTIVE: The present study is aimed: To investigate the potential of dried corn cob and corn leaves biomass and entrapment of biomass in Na-alginate polymeric matrix. To study the biosorption of Cr(III) and Cr(VI) from aqueous solution. To observe the effect of different conditions such as pH, initial metal concentration and time required for establishment of equilibrium. To evaluate the various methods for improving the metal ion removal capacities of corn cob and corn leaves. REVIEW OF LITERATURE: Krishna et al. (2005) studied the possibility of using moss (Funaria hygrometrica), immobilized in a polysilicate matrix as substrate for speciation of Cr(III) and Cr(VI) in various water samples has been investigated. Experiments were performed to optimize conditions such as pH, amount of sorbent and flow rate, to achieve the quantitative separation of Cr(III) and Cr(VI). During all the steps of the separation process, Cr(III)was selectively sorbed on the column of immobilized moss in the pH range of 4-8 while, Cr(VI) was found to remain in solution. The retained Cr(III) was subsequently eluted with 10 ml of 2 mol là ¢Ã‹â€ Ã¢â‚¬â„¢1 HNO3. A pre-concentration factor of about 20 was achieved for Cr(III) when, 200 ml of water was passed. The immobilized moss was packed in a home made mini-column and incorporated in flow injection system for obtaining calibration plots for both Cr(III) and Cr(VI) at low ppb levels that were compared with the plots obtained without column. After separat ion, the chromium (Cr) species were determined by inductively coupled plasma mass spectrometry (ICP-MS) and flame atomic absorption spectrometry (FAAS). The sorption capacity of the immobilized moss was found to be 11.5 mg gà ¢Ã‹â€ Ã¢â‚¬â„¢1 for Cr(III). The effect of various interfering ions has also been studied. The proposed method was applied successfully for the determination of Cr(III) and Cr(VI) in spiked and real wastewater samples and recoveries were found to be >95%. Anjan et al.(2007). analysed Biosorption of Cr(VI) using native strains of cyanobacteria from metal contaminated soil in the premises of textile mill. Biosorption reported as a function of pH (1-5), contact time (5-180 min) and initial chromium ion concentration (5-20 mg/l) to find out the maximum biosorption capacity of alginate immobilized Nostoc calcicola HH-12 and Chroococcus sp. HH-11. The optimum conditions for Cr(VI) biosorption are almost same for the two strains (pH 3-4, contact time 30 min and initial chromium concentration of 20 mg/l) however, the biomass of Chroococcus sp. HH-11 was found to be more suitable for the development of an efficient biosorbent for the removal of Cr(VI) from wastewater, as it showed higher values of qm and Kf, the Langmuir and Freundlich isotherm parameters. Both the isotherm models were suitable for describing the biosorption of Cr(VI) by the cyanobacterial biosorbents. Gao et al. (2008) analysed the removal of Cr(VI) from aqueous solution by rice straw, a surplus agricultural by product . The optimal pH was 2.0 and Cr(VI) removal rate increased with decreased Cr(VI) concentration and with increased temperature. Decrease in straw particle size led to an increase in Cr(VI) removal. Equilibrium was achieved in about 48 h under standard conditions, and Cr(III), which appeared in the solution and remained stable thereafter, indicating that both reduction and adsorption played a part in the Cr(VI) removal. The increase of the solution pH suggested that protons were needed for the Cr(VI) removal. A relatively high level of NOà ¢Ã‹â€ Ã¢â‚¬â„¢3 notably restrained the reduction of Cr(VI) to Cr(III), while high level of SOà ¢Ã‹â€ Ã¢â‚¬â„¢24 supported it. The promotion of the tartaric acid modified rice straw (TARS) and the slight inhibition of the esterified rice straw (ERS) on Cr(VI) removal indicated that carboxyl groups present on the biomass played an i mportant role in chromium remediation even though were not fully responsible for it. Isotherm tests showed that equilibrium sorption data were better represented by Langmuir model and the sorption capacity of rice straw was found to be 3.15 mg/g. Li et al. (2008) investigated the comparative study on adsorptions of Pb(ll) and (CrVl) ions by free cells and immobilized cells of Synechococcus sp. ,in which different aspects including Zeta potential of the cells, the influence of pH, temperature and initial concentration of metal ions, as well as adsorption kinetics and mechanism were referred. The lyophilized free cells have a surface isoelectric point at pH 3, and the correlative experiment indicates that there is an electrostatic adsorption feature of Cr(Vl) and Pb(ll). The immobilization of the free cells by Ca-alginate does not significantly modify the adsorption features of the biosorbent. The absorption processes of Cr(Vl) and Pb(ll) on both free and immobilized cells are apparently affected by pH and the initial concentration of metal ions in the bulk solution, but are much weakly affected by temperature in the test range of 10à ¢- ¦C-50à ¢- ¦C. The slow course of biosorption follows the first order kinetic model, t he adsorption of Pb(ll) obeys both Langmuir and Freundlich isotherm models, while the adsorption of Cr(Vl) obeys only Freundlich model. FT-IR results indicate that carboxylic, alcoholic, amide and amino groups are responsible for the binding of the metal ions, and reduction of Cr(lll) to Cr(Vl) takes place after Cr(Vl) adsorbs electrostatically onto the surface of the biosorbents. Park et al. (2008) analysed agricultural biowastes such as banana skin, green tea waste, oak leaf, walnut shell, peanut shell and rice husk, banana skin screened as the most efficient biomaterial to remove toxic Cr(VI) from aqueous solution. X-ray photoelectron spectroscopy (XPS) study revealed that the mechanism of Cr(VI) biosorption by banana skin was its complete reduction into Cr(III) in both aqueous and solid phases and partial binding of the reduced-Cr(III), in the range of pH 1.5-4 tested. One gram of banana skin could reduce 249.6 ( ±4.2) mg of Cr(VI) at initial pH 1.5. Namely, Cr(VI)-reducing capacity of banana skin was four times higher than that of a common chemical Cr(VI)-reductant, FeSO4.7H2O. To diminish undesirable/serious organic leaching from the biomaterial and to enhance removal efficiency of total Cr, its powder was immobilized within Ca-alginate bead. The developed Cr(VI)-biosorbent could completely reduce toxic Cr(VI) to less toxic Cr(III) and could remove alm ost of the reduced-Cr(III) from aqueous phase. On the basis of removal mechanisms of Cr(VI)and total Cr by the Cr(VI)-biosorbent, a kinetic model was derived and could be successfully used to predict their removal behaviors in aqueous phase. In conclusion, our Cr(VI)-biosorbent must be a potent candidate to substitute for chemical reductants as well as adsorbents for treating Cr(VI)-bearing waste waters. Alez et al. (2009) investigated the biosorption of Cr(III) onto packed columns of Agave lechuguilla using an advective-dispersive (AD) model and its analytical solution. Characteristic parameters such as axial dispersion coefficients, retardation factors, and distribution coefficients were predicted as functions of inlet ion metal concentration, time, flow rate, bed density, cross-sectional column area, and bed length. The root mean square error (RMSE) values 0.122, 0.232, and 0.285 corresponding to the flow rates of 1, 2, and 3 (10à ¢Ã‹â€ Ã¢â‚¬â„¢3)dm3 minà ¢Ã‹â€ Ã¢â‚¬â„¢1, respectively,indicated that the AD model provides an excellent approximation of the simulation of lumped breakthrough curves for the adsorption of Cr(III) by lechuguilla biomass. Therefore,the model can be used for design purposes to predict the effect of varying operational conditions. Chen et al. (2010) analysed Cr(III) ionic imprinted membrane adsorbents Cr(III)-PVA/SA) by blending sodium alginate (SA) with polyvinyl alcohol (PVA). In these new membrane adsorbents, polyethylene glycol was used as porogen, and glutaraldehyde was the cross-linking agent. Our new developed membrane adsorbents can be used without centrifugation and filtration. To investigate the adsorption kinetics of Cr(III) ions from aqueous solution onto this newly developed Cr(III)-PVA/SA, we performed a batch of experiments under different conditions by changing the concentration of Cr(III) ions in the Cr(III)-PVA/SA, pH value of the solution, adsorbent dose, initial Cr(III) ions concentration, adsorption temperature and contact time. Our Cr(III)-PVA/SA exhibited the maximum Cr(III) ions uptake capacity of 59.9 mg/g under the following conditions: 0.078 wt% of Cr(III) ions in the Cr(III)-PVA/SA, solution pH value of 6.0, adsorbent dose of 0.5 g/L, the initial Cr(III) ions concentration of 50 mg/ L, at 25 à ¢- ¦C. To study the mechanism of adsorption process, we examined the intra-particular diffusion model, Lagergren pseudo-first-order kinetic model and pseudo-second-order kinetic model, and found pseudo-second-order kinetic model exhibited the best correlation with our experimental data. Furthermore, our adsorption equilibrium data could be better described by the Langmuir equation. Competitive adsorption studies of the binary system of Cr(III)/Cu(II), Cr(III)/Cd(II) and the ternary system of Cr(III)/Cu(II)/Cd(II) were also investigated using Cr(III)-PVA/SA, the results indicated that selectively adsorbed amount of Cr(III) ion on Cr(III)- PVA/SA is significantly higher than that of Cu(II) and Cd(II) ions. We also used five times consecutive adsorption-desorption experiments to show that the Cr(III)-PVA/SA has high adsorption and desorption efficiencies. Huang et al.( 2010) studied a new approach for the preparation of tannin-immobilized adsorbent by using mesoporous silica bead as the supporting matrix. Bayberry tannin-immobilized mesoporous silica bead (BT-SiO2) was characterized by powder X-ray diffraction to verify the crystallinity, field-emission scanning electron microscopy to observe the surface morphology, and surface area and porosity analyzer to measure the mesoporous porous structure. Subsequently, the adsorption experiments to Cr(III) were applied to evaluate the adsorption performances of BT-SiO2. It was found that the adsorption of Cr(III) onto BT-SiO2 was pH-dependent, and the maximum adsorption capacity was obtained in the pH range of 5.0-5.5. The adsorption capacity was 1.30mmolgà ¢Ã‹â€ Ã¢â‚¬â„¢1 at 303K and pH 5.5 when the initial concentration of Cr(III) was 2.0mmolLà ¢Ã‹â€ Ã¢â‚¬â„¢1. Based on proton nuclear magnetic resonance (HNMR) analyses, the adsorption mechanism of Cr(III) on BT-SiO2 was proved to be a che lating interaction. The adsorption kinetic data can be well described using pseudo-first-order model and the equilibrium data can be well fitted by the Langmuir isothermal model. Importantly, no bayberry tannin was leached out during the adsorption process and BT-SiO2 can simultaneously remove coexisting metal ions from aqueous solutions. In conclusion, this study provides a new strategy for the preparation of tannin-immobilized adsorbents that are highly effective in removal of heavy metals from aqueous solutions. Kathiravan et al. (2010) studied the external mass transfer effects on the reduction of hexavalent chromium (Cr(VI)) using calcium alginate immobilized Bacillus sp. in a re-circulated packed bed batch reactor (RPBR). The effect of flow rate on the reduction Cr(VI) was studied. Theoretically calculated rate constants for various flow rates were analyzed using external film diffusion models and compared with experimental values. The external mass transfer coefficients for the bioconversion of Cr(VI) were also investigated. The external mass transfer effect was correlated with a model of the type JD = K, Re (1-n). The model was tested with various K values and the mass transfer correlation JD = 5.7, Re=0.70 was found to predict the experimental data accurately. The proposed model would be useful for the design of industrial reactor and scale. Ansari et al. (2011) immobilized Rosa centifolia and Rosa gruss an teplitz distillation waste biomass using sodium alginate for Pb(II) uptake from aqueous solutions under varied experimental conditions. The maximum Pb(II) adsorption occurred at pH 5. Immobilized rose waste biomasses weremodified physically and chemically to enhance Pb(II) removal. The Langmuir sorption isothermand pseudosecond- order kinetic models fitted well to the adsorption data of Pb(II) by immobilized Rosa centifolia and Rosa gruss an teplitz. The adsorbed metal is recovered by treating immobilized biomass with different chemical reagents (H2SO4, HCl and H3PO4) and maximum Pb(II) recovered when treated with sulphuric acid (95.67%). The presence of cometals Na, Ca(II), Al(III), Cr(III), Cr(VI), and Cu(II), reduced Pb(II) adsorption on Rosa centifolia and Rosa gruss an teplitz waste biomass. It can be concluded from the results of the present study that rose waste can be effectively used for the uptake of Pb(II) from aqueous streams.

Modern Labyrinth Essay -- Film Analysis

Film is a form of storytelling, and all stories are, in essence recycled, contemporary films must modernize a story of the past to make it accessible to modern audiences. This is the case with the film, Pan’s Labyrinth. The myth of â€Å"Theseus and the Minotaur† has been rewritten and modernized in the 2006 film, Pan’s Labyrinth. The myth â€Å"Theseus and the Minotaur† and the morals that exist within it, present a context in which it will be possible to interpret and analyze the film Pan’s Labyrinth as a modern day rewriting of the myth. In order to understand how Pan’s Labyrinth has been rewritten, it is important to first understand the original myth of â€Å"Theseus and the Minotaur†. According to Edith Hamilton’s Mythology, the story of Theseus and his quest to slay the Minotaur begins long before Theseus’s birth. â€Å"Minos, the powerful ruler of Crete, had lost his only son†¦while the young man was visiting the Athenian King† (Hamilton 211). In order to seek revenge, Minos invaded Athens and â€Å"declared that he would raze it to the ground unless every nine years the people sent him a tribute of seven maidens and seven youths† (Hamilton 212). When the victims reached Crete, they would be sacrificed to a beast that was â€Å"half bull, half human†, known as the Minotaur (Hamilton 212). The Minotaur was housed in a labyrinth where â€Å"escape was impossible† (Hamilton 212). â€Å"To this place, the young Athenians were each time taken and left to t he Minotaur† (Hamilton 212). This ritual continued until one year, Theseus, son of the Athenian king and heir to throne, offered to be one of the victims. Unbeknownst to the people, Theseus had every intention of slaying the beast. â€Å"When the young victims arrived in Crete they were paraded before the inhabitants ... ... bravely and defiantly act against authority rather than blindly remain obedient. This film shows the power of innocence over evil and the triumph of imagination over colorless servitude just as the original tale of Theseus and the Minotaur, but with a darker new interpretation. Works Cited Filmtracks Modern Soundtrack Reviews. (2007, January 05). Retrieved May 04, 2012, from http://www.filmtracks.com/titles/pans_labyrinth.html Goodykoontz, B., & Jacobs, C. P. (2011). Film: From Watching to Seeing. San Diego, CA: Bridgepoint Education, Inc. https://content.ashford.edu Hamilton, Edith. Mythology. 1942. N.p.: Back Bay Books, 1998. Print VC. (2010, September 23). The Vigilant Citizen. Retrieved May 05, 2012, from The Esoteric Interpretation of Pan's Labyrinth: http://vigilantcitizen.com/moviesandtv/the-esoteric-interprentation-of-pans-labyrinth/

Literary Canon Definition Essay

A literary canon is a classification of literature. It is compromised of literary works that share similar or related characteristics and are considered to be the most important of a specific time frame or place. The process in which a work is canonized is completely subjective. And just as the judgments and opinions of people change over time, so do literary canons. The status a work receives when it is entered into a literary canon is based on its relevance to the time period. Therefore a social change such as the feminist movement can determine what works are added and removed from a literary canon  Both the works of Gail Godwin’s â€Å"A Sorrowful Woman† and Karen Van Der Zee’s â€Å" A Secret Sorrow† were composed during the rise of feminism. However, the perspective of woman each work has varies greatly. â€Å" A Secret Sorrow† reflects the stereotypical view of woman that the feminist movement so strongly opposed. The view that woman are child bearing objects and should complete the role of the traditional housewife is irrelevant to the social changes happening during time period. In stark contrast, â€Å" A Sorrowful Woman† is written about a woman who is weary and unsatisfied with her role as a mother and child. She even goes as far as to detach herself from her family and isolate herself into one room. This perspective ties closely with way many women felt during the time period when feminism was rising. Thus its social and historical relevance to the time period makes â€Å"A Sorrowful Woman† a much better fit to be entered into the literary canon.

EPC Plant Equipment Maintenance Process

Man-hours of Planned WOW Standby Man-hours ratio 0 No. Of Standby Man-hours / No. Of total Man-hours Mean work-order execution time (Days) Maintenance cost and cost ratio 0 Total maintenance cost per month / Total equipment book value 0 Differentiated values for man-hours and spare-parts 0 Divided in separated categories of equipment (rotary, fixed, facilities, etc. ) Measured monthly Level 1 cross-functional map of the current processWe at EPIC have been able to produce and deliver high quality, high-value chemicals to our customers through modern process technologies and hallucinated equipment and facilities. However, The ever increasing competition in the market requires us to reduce our plant maintenance costs and improve maintenance productivity by reducing non-value-adding activities and idle times, optimizing our manpower and machinery resource allocation, reducing spare-parts inventories, and minimizing the equipment idle-time and maintenance/procurement delays. These objecti ves may not be achieved unless we review, assess, and improve our maintenance planning and execution processes.To achieve an acceptable level of maintenance quality and productivity aimed at increasing production reliability and continuation, we have proposed to initiate a comprehensive analysis of maintenance processes, targeted at 50% reduction in maintenance costs and time, 30% reduction in spare parts inventory, and an average inter-overhaul period of at least 8 years. Implementing the above initiative will hopefully enable us to maintain our cost leadership and remain at the top of the domestic chemicals market. Review/analysis of the current state and its problems/issues As cited in the section n symptoms/problems and the root cause analysis chart, The most basic symptoms of the maintenance process which are manifested in the internal customer's dissatisfaction are delayed execution and poor quality of maintenance work.These are mainly attributed to unskilled maintenance worke rs, poor coordination and cooperation between production and maintenance workers, and long procurement procedures, which result in several losses: 0 Downtime from breakdown and changeover times 0 Speed losses (when equipment fails to operate at its optimum speed) 0 Idling and minor stoppages due to the abnormal operation of sensors, blockage of work on hates, etc. 0 Process defects due to scrap and quality defects to be repaired 0 Reduced yield in the period from machine start-up to stable production. But the ultimate cause of all these inefficiencies lies in the non-optimized function-oriented hierarchical organization within the maintenance and other company-wide departments. In fact, this last phenomenon is the cause of fragmented processes and unnecessary control and inspection, which in turn hinder employees' motivation and empowerment as well as cause very long cycles of spare-parts procurement. Initial improvements- Streamlining