Effectiveness Of Salt Versus Oral Mouthwash Biology Essay

Effectiveness Of Salt Versus Oral Mouthwash Biology Essay This experiment aims to compare the effectiveness of salt versus oral mouthwash in inhibiting the growth of oral bacteria such as Treponema denticola, Fusospirochetes, Porphyromonas gingivalis and so on. These are chosen as subjects of experiment as they cause Periodontal Disease or Gingivitis among people. Finding a solution to prevent the growth of these disease-causing bacteria will help solving the problem.[10] Salt or Sodium Chloride is an ionic compound bonded together by ionic bond between Sodium ion and Chloride ion. Table salt is a processed salt where it is used as a condiment and food preservation. Salt is currently mass-produced by evaporation of seawater. It is also proved to provide medicinal effects. For example, people often heal wounds using salt solution and it is good against infections as it reduces inflammation of wounds. Moreover, researches nowadays have proven salt can bring about an effect in inhibiting the growth of bacteria. This is why people often use a cup of water with two tablespoons of edible salt as mouthwash. Nevertheless, salt solution can be used to treat sore throats. Salt is considered antibacterial because it creates no wet condition for bacteria to grow in. In other words, salt is very good at dehydrating and absorbing water from anything it comes contact with. Salt solution does not kill the bacteria but it inhibits the growth of them. Therefore, it is considered as bacteriostatic.[9][12] Mouthwash is a product made for enhancing oral hygiene. Some brands of mouthwash claim that they can help to kill bacteria causing gingivitis and bad breath. Anti-cavity mouth rinse uses fluoride compound to protect against tooth decay. A person has to gargle the mouthwash without the need of brushing and flossing teeth. Besides, mouthwash can also help removing mucus and food particles which are situated down in the throat. This product is bactericidal where it kills bacteria which are found in mouth. Active ingredients  in commercial brands of mouthwash can include  thymol,  eucalyptol, menthol,  chlorhexidine gluconate,  benzalkonium chloride,  cetylpyridinium chloride,  methylparaben,  hydrogen peroxide,  domiphen bromide  and sometimes  fluoride,  enzymes, and  calcium. Ingredients also include water, sweeteners such as  sorbitol,  sucralose,  sodium saccharin, and  xylitol. However, there is some evidence which shows that mouthwash contributes to oral cancer. This is shown by a literature review by McCullough and Farah from 2008 published in the  Dental Journal of Australia.[13][14] Oral hygiene is very important to prevent dental problems and bad breath. One of the common ways to practise oral hygiene is tooth brushing. Some people may use oral mouthwash to kill the disease-causing bacteria situated inside the mouth. One of the common disease regarding oral hygiene is Gingivitis. Gingivitis is a term used to describe non-destructive  periodontal disease. Gingivitis is often caused by types of bacteria stated above. Bacteria activity caused by these microorganisms can lead to severe effects including refractory periodontitis and acute necrotizing gingivitis, resulting in bone resorption and tooth loss. Gargling with oral mouthwash is effective but the price is expensive. Furthermore, it is not always available at any outlets all the time. Practising to gargle with salt water is a convenient method to keep the oral cavity clean. Table salt can be easily obtained from any outlets and the price is far cheaper than any oral mouthwash. One thing good about salt is it does not cause side effects as no artificially made chemicals are contained within it. But how does the effectiveness vary compared to commercial oral mouthwash?[15] Experimental Hypothesis : There is a significant difference for the effectiveness of commercial mouthwash in inhibiting oral bacteria compared to salt solution of concentration greater than or equal to 0.4moldm-3. Null Hypothesis : There is no significant difference for the effectiveness of commercial mouthwash in inhibiting oral bacteria compared to salt solution of concentration greater than or equal to 0.4moldm-3. Variables : Manipulated variable : Types of antibacterial solution Responding variable : Number of bacteria colony found on nutrient agar Fixed variables : Temperature of incubation period, contents of nutrient agar, type of bacteria cultured, time taken for gargling mouthwash. Apparatus : Bottles of inoculum, work table, sterilised petri dishes, micropipette, 1000ml conical flask, Bunsen burner, incubator, 100ml beaker, electronic balance, 250ml volumetric flask, filter funnel, dropper, stopper, bio-hazard waste bin. Materials : Sterilised cotton buds, sterilised distilled water, distilled water, commercial mouthwash B, disinfectant, tissue papers, Dettol solution, gloves, teats of micropipette, nutrient agar solution, aluminium foil, solid Sodium Chloride. Planning Two trial experiments were conducted in overall. The first trial experiment was carried out to determine which commercial mouthwash is the best in inhibiting the growth of oral bacteria. The commercial mouthwash which has the highest inhibition rate will be compared to salt solution. Three types of commercial mouthwash namely A, B and C were used. Three sterilised petri dishes were obtained. A swab sample was taken before gargling the commercial mouthwash. This was tagged as before to indicate the number of bacteria colony found in nutrient agar before commercial mouthwash was used and acted as a control. Three human subjects were volunteered to gargle each type of commercial mouthwash. This was assuming that the number of oral bacteria in every person is the same. After gargling three types of commercial mouthwash for 10 seconds, three swab samples were obtained from every subject. The bacteria were cultured and platted and the number of bacteria colony found on agar was counted. Al l sterilised petri dishes were then placed in an incubator for a week. The result showed that commercial mouthwash B has the highest bacterial inhibition rate. Types of commercial mouthwash Number of bacteria colony found on nutrient agar Control 7 A 4 B 1 C 2 Table 1.1 : The number of bacteria colony found on nutrient agar with respective commercial mouthwash used. The second trial experiment was done to determine the time taken to gargle commercial mouthwash B in order to obtain the maximum inhibition rate. In other words, this trial was carried out to choose a suitable period of gargling mouthwash. Five sterilised petri dishes were obtained. Four types of gargling period had been chosen in this trial which were 5, 10, 15 and 20 seconds. Four human subjects were volunteered to gargle for every period of time. Commercial mouthwash B was used as it gave the highest rate of bacterial inhibition from the first trial conducted. A swab sample was obtained before the trial proceeded. This was labelled as before to indicate the number of bacteria colony found in nutrient agar before gargling commercial mouthwash B and acted as a control. Every human subject was ordered to gargle commercial mouthwash B with the respective period of time chosen earlier. After gargling, four swab samples were obtained from each subject. The trial was again assuming that the amount of oral bacteria in every person is the same. The bacteria was cultured and platted and the number of bacteria colony found on nutrient agar was counted. All sterlised petri dishes were then placed in a incubator for a week. The result showed that a period of 10 seconds to gargle commercial mouthwash B has the highest bacterial inhibition rate. Time taken to gargle commercial mouthwash B / seconds Number of bacteria colony found on nutrient agar 0 8 5 5 10 2 15 2 20 2 Table 1.2 : The number of bacteria colony found on nutrient agar with respective period of time to gargle commercial mouthwash B. Real Experimental Procedures Preparing salt solution of various concentrations Mass of an empty 100ml beaker was weighed using an electronic balance. For 0.1M salt water, 1.4625g of solid Sodium Chloride (NaCl) was weighed. The weighed solid was then dissolved in the 100ml beaker using distilled water. The solution was poured into a 250ml volumetric flask using a filter funnel. The beaker and filter funnel were rinsed with distilled water and added into the volumetric flask. Distilled water was carefully added into the volumetric flask until the level of solution reached the graduation mark. Dropper was used instead to prevent any exceed above the graduation mark. A stopper was fitted on the mouth of volumetric flask and the solution was shaken carefully. Steps 1 to 8 were repeated by replacing 1.4625g of NaCl with 2.925g for 0.2M, 3.4875g for 0.3M, 5.850g for 0.4M and 7.3125g for 0.5M. Preparing inoculums of bacteria A sterilised cotton bud was used to obtain the swab sample from mouth. The cotton bud was then dipped into a bottle of inoculum containing a quarter volume of sterilised distilled water and labelled as before. The cotton bud was then disposed off. After gargling 50ml salt water with concentration of 0.1M, another swab sample was obtained and dipped into bottle of inoculums containing sterilised distilled water. This was labelled as 0.1M. Step 3 was repeated by replacing 0.1M salt water with 0.2M, 0.3M, 0.4M, 0.5M and commercial mouthwash B. Preparing petri dishes with bacteria Work table was sprayed with disinfectant to kill all the bacteria present. Table was wiped with several pieces of tissue papers. Hands were washed with Dettol solution to ensure no bacteria were found. Gloves were worn on both hands. Three sterilised petri dishes were obtained. A bottle of inoculum (before) was taken. A micropipette was used and calibrated to 200 microlitres. Teat of micropipette was placed at the edge of micropipette. Hands were forbidden to touch the teat so that it would not be contaminated with bacteria. The bottle of inoculum was opened using a hand and the end of micropipette was pressed gently to suck the content of inoculums. The cap of bottle was closed and the content of inoculum was placed in the first petri dish. The lid was opened slightly till the teat can be placed in the petri dish. The end of micropipette was pressed fully to release the sucked content of inoculums. The teat was then expelled into a bio-hazard waste bin. Same procedures were repeated for second and third petri dishes. Steps 6 to 13 were repeated by replacing bottle of inoculum (before) with bottle labelled 0.1M, 0.2M, 0.3M, 0.4M, 0.5M and commercial mouthwash B. Preparing bacterial lawn Nutrient agar solution was poured into a 1000ml conical flask. The solution was left to cool down for several minutes. After several minutes, the mouth of conical flask was heated with a Bunsen burner. This was done so that the aluminium foil could be capped on the mouth of conical flask for sterilising purpose. The mouth of conical flask was placed gently at a petri dish. The culture solution was poured into the petri dish until it was one-third full. This process is known as platting. Aluminium foil was capped back on the mouth of conical flask. The petri dish containing bacteria and agar solution was swirled gently by pressing and moving the petri dish on the table. The petri dish was left on the table for 10 minutes. This was done to ensure that the culture solution is solidified. Steps 1 to 7 were repeated for every petri dishes. All petri dishes were inverted and stored in an incubator for a week. After one-week incubation period, all petri dishes were observed for bacterial activity. Risk Assessment A complete aseptic procedure was used throughout the experiment. The work table was sprayed using a disinfectant to kill all the foreign bacteria present. Hands were washed with Dettol solution and gloves were worn so that I would not be infected by the bacteria when having a meal. Sterilised petri dishes were used because it contained only the oral bacteria when experiment was carried out. This was important to maintain the validity of results obtained. Sterilised distilled water was also used to make sure only oral bacteria were cultured. Teats of the micropipette were disposed off into a bio-hazard waste bin because they were contaminated with bacteria and could possibly infect other people. Disposing off the teats will solve the problem. The lid of petri dish was opened slightly when introducing bacteria into the petri dish. This was done to prevent any foreign bacteria in the lab to grow and reproduce in the petri dish containing agar solution. Distilled water was used to prepar e various concentrations of salt solution to make sure no other impurities would affect the concentration or molarity of the solution. The electronic balance was tarred to reset the reading value before weighing a specific mass of solid Sodium Chloride. Dropper was used to prevent any exceed above the graduation mark of volumetric flask when dilution was carried out. Mouth of conical flask was heated with Bunsen burner to ensure no contamination from other bacteria. Aluminium foil was capped back on the mouth of conical flask to prevent any foreign bacteria from entering the conical flask. At the end of the experiment, all petri dishes were sent for autoclaving for disposal purpose. Results Types of antibacterial solution Number of bacteria colony found on nutrient agar 1stReading 2ndReading 3rdReading Mean Value Control 7 6 8 7.0 0.1M Salt Water 9 6 5 6.7 0.2M Salt Water 8 5 7 6.7 0.3M Salt Water 6 5 7 6.0 0.4M Salt Water 3 2 3 2.7 0.5M Salt Water 2 1 1 1.3 Commercial Mouthwash B 1 0 2 1.0 Table 1.3 : Number of bacteria colony found on nutrient agar with respective types of antibacterial solution used. Keys : 1st reading was obtained from first petri dish. 2nd reading was obtained from second petri dish. 3rd reading was obtained from third petri dish. Graph 1.1 : Bar chart of mean number of bacteria colony found on nutrient agar against types of antibacterial solution. Statistical Analysis There is no significant difference for the effectiveness of commercial mouthwash in inhibiting oral bacteria compared to salt solution of concentration greater than or equal to 0.4moldm-3. The calculated U-values are more than the Ucrit value which is zero at 5% significance level. The null hypothesis is not rejected as the U-values are not lower than Ucrit value. Therefore, null hypothesis is accepted and the experimental hypothesis is rejected. There is insufficient evidence to state that there is a significant difference for the effectiveness of commercial mouthwash in inhibiting oral bacteria compared to salt solution of concentration greater than or equal to 0.4moldm-3. 0.4M salt solution Rank Commercial mouthwash B Rank 3 5,5 0 2 1 3.5 1 1 2 5.5 1 3.5 à ¢Ã‹â€ Ã¢â‚¬ËœRank sample 1 14.5 à ¢Ã‹â€ Ã¢â‚¬ËœRank sample 2 6.5 Table 1.4 : Calculations for Mann-Whitney Test. Formulae for calculating U-values : U1 = n1n2 + n1(n1+1) à ¢Ã‹â€ Ã¢â‚¬ËœRank sample 1 2 U2 = n1n2 + n1(n1+1) à ¢Ã‹â€ Ã¢â‚¬ËœRank sample 2 2 Keys : n1 = size of the sample 1 (0.4M salt solution) n2 = size of the sample 2 (Commercial mouthwash B) à ¢Ã‹â€ Ã¢â‚¬ËœRank sample 1 = total rank of sample 1 à ¢Ã‹â€ Ã¢â‚¬ËœRank sample 2 = total rank of sample 2 Calculations of U-values for both samples U1 = (3)(3) + (3)(3+1) 14.5 = 0.5 2 U2 = (3)(3) + (3)(3+1) 6.5 = 8.5 2 Significance level = 5% Value of Ucrit according to table = 0 Data analysis From the experiment conducted, it is shown that the mean number of bacteria colony found in nutrient agar due to commercial mouthwash B is lower than other salt solutions with various concentrations. When the concentration of salt solution is less than 0.4moldm-3, there is a large difference for the mean number of bacteria colony found between commercial mouthwash B and salt solution. The result changes when concentration of salt solution increases to 0.4moldm-3 where there is only a small difference for the mean number of bacteria colony found in nutrient agar. Commercial mouthwash B and salt solution are proven for inhibiting growth of oral bacteria. The number of oral bacteria found in mouth will drop significantly after gargling because antibacterial solutions kill or prevent the bacteria from growing. The most suitable method to find out the effect of antibacterial solution on the growth of oral bacteria is to count the number of bacteria colony found on nutrient agar after gargling the solutions. The results obtained are compared with the number of bacteria colony found before gargling the solutions which acts as a control. Temperature of incubation is set constant at 36.9oC where it represents the exact body temperature of a human body.[3] Commercial mouthwash B contains an active ingredient namely Chlorhexidine gluconate. It has both bactericidal and bacteriostatic mechanisms of action. It is a type of cell membrane agent. It disrupts the structure of cell membrane, causing the rigidity of the cell membrane to be broken down. This active chemical binds onto lipopolysaccharides, situated at outer membrane of Gram-negative bacteria, disrupting the structure lipid bilayer consisting of phospholipids. When the fluid lipid bilayer is broken down, cell organelles and metabolites no longer bordered by cell membrane. Loss of metabolites results in death of a bacterium.[1][6] Salt solution has a different mechanism in inhibiting growth of oral bacteria. Every microorganism needs an aqueous environment to thrive in. In low concentration of salt solution, the surrounding environment is hypotonic. The solute concentration remains higher than the surrounding solution. Oral bacteria have the ability to pump in ions with the energy comes from ATP by respiratory enzyme found in mesosomes. This ion pump moves ions from surrounding solution into the body of oral bacteria. There is water potential from surrounding solution to the cytoplasm of oral bacteria. Water moves into the cell by osmosis and this gives an aqueous environment which is favourable for oral bacteria to grow and reproduce. At high concentration of salt solution, the solute concentration in the surrounding solution is greater than the cytoplasm of oral bacteria. This is because the ion pump cannot keep up to pump in more ions efficiently. There is water potential from cytoplasm of bacteria to surro unding solution. Water moves out from cell by osmosis. Oral bacteria are dehydrated and eventually die within a minute. [5][7][8] However, there is a difference in mean number of bacteria colony found when different antibacterial solutions are used. The difference is mainly because active ingredient in commercial mouthwash B kills the bacteria and they can no longer reproduce again. When salt solution is used, bacteria may move away from the solution which has high solute concentration. Bacteria are not killed and may have the chances to reproduce again. Sample number 75% lake water 50% lake water 25% lake water 10% lake water Distilled water Sea water 183 162 154 95 32 10 8 185 24 20 16 4 1 1 186 33 38 29 2 0 2 187 266 247 109 16 3 5 187 224 214 125 17 11 7 188 290 285 146 41 8 14 Table 1.4 : number of bacteria found in respective water sample.[16] (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC545388/pdf/jbacter00775-0012.pdf) From the above data, it was an experiment conducted Dr.Claude E. Zobell and D. Quentin Anderson to investigate the number of bacteria found in different water sample. It can be seen that the number of bacteria colony decreased tremendously when the bacteria were cultured in a sample of sea water. Sea water has a high concentration of salt which will provide a high solute concentration compared to cytoplasm of oral bacteria. The difference from my data and theirs will be discussed in the evaluation section. Evaluation There are a few limitations found in this experiment. Contamination may occur when introducing bacteria into the petri dish. Foreign bacteria found in the air may enter the petri dish and reproduce in the nutrient agar. This was inevitable because lamina floor was broken down and could not be used for this experiment. A known species of a bacterium cannot be used as it is not available in the lab. Therefore, swab samples were obtained and these contained a mixture of bacteria as stated above. Experiment cannot be conducted only on a type of bacterium. Besides, nutrient agar solution may not be sterilised completely as the autoclave machine in the lab was broken down and spare parts were not available by that time. Therefore, nutrient agar solution was sterilised using a pressure cooker. This caused other foreign bacteria to survive and reproduce in the nutrient agar. The period of incubation chosen is a week because the bacteria cultured from swab samples are low in number. This requ ires a longer period for bacteria to grow and reproduce. The human subjects involved may not gargle the antibacterial solutions in a correct way. This will affect the validity of data obtained during observation. Lastly, the genetic makeups of bacteria found in swab samples are not known. This could not be prevented as a specific strain of bacterium was not recognised. As a result, some of the bacteria may have mutated and probably resistant to the antimicrobial solutions. The results obtained will be affected. These are the reasons why the findings are different from this experiment and experiment conducted by Professor above. The experiment can be modified by using a known strain of bacterium. This will increase the validity of data significantly. Moreover, different type of nutrient agar which is favourable for oral bacteria to grow can be used. This will cause the bacteria to grow and reproduce faster than expected. Thus, results can be obtained earlier. Furthermore, nutrient agar solution can be sterilised with an autoclave machine so any foreign bacteria present will be killed. Conclusion There is no significant difference for the effectiveness of commercial mouthwash in inhibiting oral bacteria compared to salt solution of concentration greater than or equal to 0.4moldm-3. Null hypothesis is accepted. Source Evaluation Source 1, 2 and 3 are published books thus the information are reliable. Sources 4 to 8 are journals. They are written by scientists all around the world and these are obtained from Science Direct webpage. Therefore, it is trustable. All the information should be factual and accurate. Source 9 and 16 are websites containing journals as well. Its journals are well-known and most of them are written by famous scientists. Sources 10,11,12,13 and 15 are websites of Wikipedia. Most of the data and information obtained here have citations and they are partially reliable and valid. Source 14 is the official website of Australian Dental Association. The information contained here is mainly about the effect of chlorhexidine. It is very reliable. Therefore, it should not contain any biased points based on arguments made.

The Differences Between A Club And A Gang :: essays research papers

The differences between a club and a gang, are quite distinct, but it is the connotational differences between these two words which distinguishes one from the other. The New Lexicon Webster's Dictionary of the English Language defines a club as; "...an association of people with some common interest who meet periodically..." It defines a gang as "...a number of men or boys banding together, esp. lawlessly..." This definition is traditionally slanted toward applying to male youth, and stereotypical gangsters, from the Mafia to street criminals. Persons who often have a negative attitude toward youth see gangs. Often individuals form gangs out of fear and for the protection of their members whether they are the Bloods and Crips of Los Angeles or the Sharks and the Jets of "West Side Story." Gangs may not possess a set of formal written rules, but all of them have their own sets of customs or conditions. Gangs may or may not be facilitated in a branch of higher and lower members, mimicking a military model. Gangs often have a loosely defined set of goals, and are often involved in delinquent activities. A socially approved form of a gang is a club. Americans generally view clubs as character building leadership opportunities; whereas, individuals typecast into gangs are persecuted as criminals. Clubs are formed with constructive goals in mind, such as making it easier for its members to find parts for a particular brand of automobile. Socioeconomic class, academic achievement, or perceived roles in society for its members all play a part in the preferential treatment given to a group which a society deems a club rather than a gang. For instance, parts of the public anticipated that motorcycle riders would cause a massive rise in crime within the Hollister area during the motorcycle rally.

McDonalds is A Competitive Fast Food Firm Essay -- Fast Food Industry

A Competitive Fast Food Firm Firms within the fast food industry fall under the market structure of competition. Market structure is a classification for the key traits of a market. The characteristics of a market that is competitive would include: a large number of buyers and sellers, easy entry to and exit from the market, homogeneous products, and the firm is a price taker. Take McDonalds fast food restaurant for example. In 1954, Ray Kroc became the first franchisee appointed by Mac and Dic McDonald in San Bernadino, California. He opened his first restaurant in De Plaines, Illinois (near Chicago), and the McDonald’s Corporation was created. By 1959, the 100th McDonald’s had opened in Chicago. In the early years of the 1960’s, Ray Kroc had bought all rights to the McDonald’s concept from the McDonald’s brothers for $2.7 million. In 1963, the 500th restaurant had opened. By the end of the decade, McDonald’s was listed on the New York stock exchange, had opened restaurants in every state of the union and also outside the USA. By 1972, assets exceeded $500 million and sales surpassed $1 billion, a new McDonald’s restaurant was opening nearly every day. In 1984, Ray Kroc died, but his company was then serving 17 million customers a day, equivalent to serving lunch to the entire population of Australia and New Zealand. If McDonald’s lined up all the hamburgers sold since 1955, they would have circled the equator 103.75 times and reach to the moon and back 5 times. Today, McDonald’s remains one of the most competitive franchises ever created because they still have a large number of buyers and sellers, easy entry to and exi... ...dustry is the ease of entry into the market. Start-up franchises within this market structure can begin operating with relatively low initial investments (compared to other industries). This is not the case where monopoly companies, such as Microsoft is concerned. There are numerous barriers to entry into a Monopolistic market structure, capital being one of the most prominent barriers. If a new franchise offered the consumer a quality product at a reduced price, then the chance of success are greatly increased. McDonald’s established a name for themselves by offering quality food and fast, friendly service. This is a very important concept in the fast food industry. Once they established themselves to the consumers and became more visible, they created more demand, which lead to a greater revenue for them.

Powering Indian Telecom Towers Environmental Sciences Essay

Solar energy has proven to be a dependable and economical method of powering telecommunication systems in topographic points where conventional electricity is unavailable or impractical. It provides an first-class beginning of clean, dependable power to maintain un-interrupted power supply to telecom towers. This paper contains a brief description of Indian telecom towers and photovoltaic ( PV ) cells used in telecommunication systems. Because solar energy systems are robust and cost effectual, the demand for solar power in telecommunications will go on to turn. Key Words-insolation, irradiance, photovoltaic, solar cell, solar energyIntroductionIndia is now in the 2nd largest of the Global telecom markets and is projected to get the better of China. Our state presently has about 400,000 telecom towers around the land and poised to increase to 450,000 towers over the following 2 old ages ( 2 ) . A big part of these towers is non connected to the electricity grid or does non hold entree to dependable electricity connoting they have to put in backup power systems in order to run without breaks. Diesel Generators have been the pick of telecom operators despite their high C imprint. Telecom Towers are estimation to fire 2 Billion Liters of Diesel ( around 500 million barrels ) yearly at a cost of 10000 crores. On an norm, about 260,000 is being spent yearly to carry through the Diesel demands of a individual telecom tower. These high input costs besides result in high pollution. While the authorities has been seeking to change over these towers t o renewable energy signifiers, most of the tower operators have been really slow to implement this alteration. The renewable energy ministry had asked telecom companies to cut down their dependence on conventional fuels and see options for partially powering telecom towers. While some tower Godheads are looking at tight natural gas and piped natural gas to power towers, Indus Towers, the largest with over 1 lakh towers in India, planned to put up 2,500 solar towers by terminal of this twelvemonth. Viom Networks, which operates more than 38,000 towers across India, plans to run more than one-quarter of this figure on alternate energy within the following two old ages. It plans to run 2,000 towers on solar power entirely by 2013. For the GSM Technology, it requires an norm of 6 BTS to run one tower. Each shelter has two ( 1.5 ton ) air conditioners for the cardinal care of the temperature for the shelter ‘s electronic systems. The DG set is typically 15 kVA capacity, which consu mes an norm of 3 liters of Diesel per hr [ 4 ] . Each tower requires energy from 1000 W to 3000 W ( older installing consumes more power as comparison to new one because of technological promotion ) . Each 1000 W consequences in the 22 tonnes/hr of emanation of CO2 if running on the province electricity and in instance of the gensets this figure is many times more. Assuming mean power ingestion of each tower is 1200 W so entire CO2 emanation is 105.6 lakh metric ton per hr by all these towers if we assume that all are running on province electricity. In India about 70 % telecom towers are in rural countries. Soon 40 % power demands are met by grid electricity and 60 % by Diesel generators [ 2 ] . The Diesel generators are of 10-15 KVA capacity and devour about 3 litres of Diesel per hr and bring forth 2.63 kilogram of CO2 per litre. For every kWh of grid electricity consumed, 0.84 Kg of CO2 is emitted. Entire CO2 emanation is around 5 million tones of CO2 due to diesel ingestion and around 8 million dozenss due to power grid per an num. The move from Diesel to solar and other alternate beginnings of energy will ensue in a decrease of 5 million dozenss of CO2 emanations every bit good as a nest eggs of immense sum in operating disbursals for telecom tower companies. Move to renewable energy beginnings can bring forth 1000000s of C credits that could countervail the opex on their towers. Therefore by replacing diesel generators with solar panels in cell phone towers, more than 5 million dozenss of C emanations could be prevented from come ining the ambiance and cut down the opex of telecom towers. India has approximately 500 million nomadic phone endorsers, more than even the population of any state except China India is expected to hold one billion mobile phone endorsers by 2015 which would intend about 250,000 more Mobile towers which, in bend, would duplicate the C emanations. Even if the solar panels supply a portion of the entire power required, it would still salvage significant sums of money, fuel and C e manations.Electricity Generation Through Solar CellsIn India the one-year solar radiation is about 5 kWh/ sq thousand per twenty-four hours with about 1500-2000 sun-shine hours per twelvemonth. Solar radiations represent the Earth ‘s most abundant energy beginning. The perennial beginning of solar energy provides limitless supply, has no negative impact on the environment. The solar photovoltaic ( PV ) modules convert solar radiation from the Sun into electrical energy in the signifier of direct current ( DC ) . Converting solar energy into electricity is the reply to the mounting power jobs in telecom towers peculiarly in the rural countries. PV or solar cells are semiconductor devices that convert sunlight into direct current electricity ( Fig.1 ) . When light photons of sufficient energy work stoppage a solar cell, they knock negatrons free in the silicon crystal construction, coercing them through an external circuit and so returning them to the other side of the solar cel l to get down the procedure all over once more. Fig. 1. ( a ) photovoltaic consequence ( B ) how a PV cell plants ( degree Celsius ) a crystalline Si panel The electromotive force end product from a individual crystalline solar cell is about 0.5 V with an amperage end product that is straight relative to the cell ‘s surface country ( about 7 amperes for a 6-inch-square multi crystalline solar cell ) . Typically, 30 to 36 cells are wired in series ( + to – ) in each solar faculty. This produces a solar faculty with a 12-volt nominal end product ( ~17 Vs at peak power ) that can so be wired in series and/or parallel with other solar faculties to organize a complete solar array. Solar cells used in telecom towers are shown in Fig 2. Solar cell is cosmopolitan and will work virtually anyplace ; nevertheless, some locations are evidently more suited than others. Irradiance is a step of the Sun ‘s power available at the Earth ‘s surface, with power peaking at about 1,000 Wattss per square metre ( W/m2 ) . With typical crystalline solar cell efficiencies about 14 to 16 per centum, approximately 140 to 160 Wattss can be generated per square metre of solar cells placed in full Sun. Insolation, which is a step of the available energy from the Sun, is expressed in footings of â€Å" full Sun hours † ( i.e. , 4 full Sun hours = 4 hours of sunshine at an irradiance degree of 1,000 W/m2 ) [ 1 ] . Fig.2 Solar cells used in telecom tower for United Nations interrupted power supply.Tele DensityTelephone introduced in India in 1882. The entire figure of telephones in the state stands at 885.99 million, while the overall tele-density has increased to 73.97 % and the entire Numberss of nomadic phone endorsers have reached 851.70 million as of June 2011. Himachal Pradesh has become the first province in India to accomplish 100 per cent tele-density. The province has about seven million nomadic clients [ 5 ] . The province population is 6.8 million as per the Census 2011 much lower than the nomadic subscriber population of seven million. While the urban tele denseness reached 150.67 per cent, the rural tele denseness reached 32.11per cent. Experts have pointed out that the grounds for this rapid growing are lowest call rates, big market base due to bigger population, well ample untapped market and robust economic growing of the state. In add-on factors like rapid technological accept ance, better service criterions, advanced merchandise offerings and competitory pricing amongst the service suppliers has besides contributed in a major manner to increase the tele-density of the state.Energy Management in Telecom TowersA Telecom tower enables telecom operators to supply web connexion to mobile users. Fig. 3 Standard Telecom System Telecom being an indispensable service requires the web to be ever available. In order to accomplish this, the tower substructure that has 2 operators uses 6-8 kilowatt ( avg. ) of electricity per hr ( Fig.3 ) . Energy demands of a telecom tower in India are presently met through: Electricity Mains Diesel Generator and UPS / Battery RacksDiesel Consumption in Telecom Towers and Environmental PollutionThe telecom operator spends 3 billion ( USD 67.42 million ) every month towards running Diesel generators in distant locations where grid base power is limited. This translates to an operational energy disbursal of around 65 billion yearly to run web towers, particularly in off-grid locations ( 4 ) . Since, Electricity supply is fickle and is non available through out the twenty-four hours in many parts, Diesel Generators ( DG ) are used to power the telecom web, as a dorsum up for power supply. DG ‘s are operational for 15-20 hours ( avg. ) in rural countries and 3- 7 hours in urban countries ( Table 1 ) seting a emphasis on the environment by manner of C emanations and noise pollution One liter of Diesel emits 2.63 kilogram of CO2 emanations. Hence telecom webs contribute to carbon emanations and planetary heating. Table 1 Power Availability at Tower SitesGrid Power Availability Cell Sites10 % : & gt ; 20 hour Chiefly metro metropoliss of Mumbai, Kolkota, Chennai, some metropoliss of Gujarat, State of Chattisgarh, some metropoliss of Punjab 20 % : 16-20 hour Covers most other major metropoliss and towns in the remainder of the state 30 % : 12-16 hour All semi-urban and little urban towns in all provinces 25 % : 8-12 hour Mostly rural countries 15 % : & lt ; 8 hour Mostly parts of Bihar and some towns of Assam, NE provinces, UP and J & A ; K The Power Problem A speedy analysis of telecom web runing costs indicates power and fuel are the primary operating costs, consisting over 30 % of entire operating cost. This is because grid power ( Electricity Board or EB power ) is extremely undependable and in a batch of instances, non available in rural countries. BTS sites require changeless and uninterrupted power for the safe operation of the web. As a consequence, BTS sites have utilized onsite Diesel generators to either supply backup or primary power in the absence of EB power. Uninterrupted operation is achieved through a battery bank. The typical constellation of DG sets is 10-15 KVA with a fuel burn rate of 2-3 liters per hr ( depending on full or half load operations ) . Assuming seven hours of DG operations in urban countries and 20 hours in rural countries, estimated use of Diesel fuel is 2-4 billion liters per twelvemonth across the 400,000 towers in India. Fuel demand is increasing with each new tower. India, with its first-class irra diance, has the chance to work Photovoltaic ( PV ) solar power to run into this challenge of onsite power coevals. Coupled with a battery backup, PV systems are a feasible and exciting option to cut down the power cost and entire operating outgo ( OPEX ) , thereby supplying a sustainable and dependable strategic solution to the fuel job. The operating cost of Diesel and solar PV system is shown in Table-2 which shows that solar PV system is economical ( 14.08/kWh ) than Diesel DG sets ( 16.19/kWh ) and besides eco friendly and can market their C recognition to cut down farther the opex of the telecom tower. Table 2. Comparative analysis of solar PV and diesel generators ( DG ) uses in telecom tower.Strictly DG setsStrictly PV systemAnnual ingestion of 15 kVA DG sets @ 3 litres/h, liters 26280 Assumed capacity, Wp 15000 4 % shut down period i.e.for 96 % operation, liters 25229 Annual sunshine hours 1650 kWh produce @ 3.5 kWh/litre 88301.5 10 twelvemonth output, kWp 247500 Diesel cost @ 42/litre, 1059618 Capital investing @ 200/Wp, 30,00,000 Cost of machine etc, 300000 Operating cost, ( including depreciation, involvement, care ) , /10 old ages 49,80,000 Operating cost ( including depreciation, involvement, housing/rent, care ) , /year 1429918 Operating cost/kWh, 16.19 Operating cost/kWh, 20.12 After 30 % subsidy 14.08 Telecommunication Companies and Their Role ECIndia has the fastest turning telecom web in the universe with its high population and development potency. India ‘s public sector telecom company BSNL ( 11.41 % ) is the seventh largest telecom company in universe. The entry of new participants into the telecom industry has made competition intense, in peculiar over the last four old ages. The dominant participants in the market presently include Bharti-Airtel ( 20.09 per cent of the Indian market ) , Reliance Communications ( 16.70 % ) , Vodafone ( 16.54 % ) , Tata Tele Services ( 11.08 % ) , Idea ( 10.97 % ) and Aircel ( 6.76 % ) ( Table 3 ) . Table 3. Share of telecom companies in Indian market and stairss taken to utilize renewables Companies Market portion, % Stairss taken for usage Renewable energy in teletowers Bharati Airtel 20.09 Targeted for solarizing 2000 towers by 2010-11. No latest information on accomplishment. Reliance Communication 16.70 Stairss taken to utilize renewable to cut down opex by 50-60 % Vodafone 16.54 23 % of its planetary operation by renewables BSNL 11.41 Taken pilot undertakings under Jawharlal Nehru Solar Mission for solarizing towers. Tata Teleservices Ltd 11.08 Deployed 31 cell sites powered by solar power and fuel cells. Idea Cellular 10.97 Solar-DG loanblend in some nomadic towers Aircel 6.76 No information available Stel 0.34 Cringle 0.39 Eti Salat 0.08 HFCL 0.18 Uninor 2.73 Videcon 0.83 MTNL 0.69 Siestema 1.21 Beginning: Telephone Regulatory Authority of India ( as on 28th Feb, 2011 ) As per the directives of Ministry of New and Renewable Energy, some companies have taken inaugural stairss to utilize renewable energy beginnings to power their telecom towers. Some major are: Bharti Infratel has set a mark of deploying 2000 renewable energy sites by the fiscal twelvemonth 2010-11. The undertaking is besides expected to ensue in an estimated decrease of 58,170 metric tons of CO2 emanations per twelvemonth. BSNL has taken up pilot undertakings for 10 kilowatts solar workss at 14 sites and Wind power undertaking at 6 USO funded sites in Rajasthan, Gujarat, Tamil Nadu, Karnataka and Maharashtra. Indus Towers, the largest with over 1 lakh towers in India, will put up 2,500 solar towers by September this twelvemonth. Viom Networks, which operates more than 38,000 towers across India, plans to run more than one-quarter of this figure on alternate energy within the following two old ages. It plans to run 2,000 towers on solar power entirely by 2013. There are around 5,60,276 Base Transceiver Stations ( BTS ) in the state. It may be noted that BTS is different from towers as one tower may hold more than one BTS. In India the tower companies portion the tower sites with all telecom operators. While the tower is erected by the tower substructure companies, the BTS is installed by the telecom operators. A nomadic tower is an aerial where electronic communications equipment are placed on a wireless mast or tower to make a cell in a cellular web. A nomadic tower is composed of a tower or other elevated construction for mounting aerial and one or more sets of transmitter/receivers transceivers, digital signal processors, control electronics, a GPS receiving system, regular and backup electrical power beginnings, and sheltering. Circle wise interruption up of BTS is given below [ 3 ] . Metro DelhiA A A A A A A A A A A A A A A A A A A A A A A A A A 20,715 MumbaiA A A A A A A A A A A A A A A A A A A A A A 21,038 KolkottaA A A A A A A A A A A A A A A A A A A A A 14,018 TotalA A A A A A A A A A A A A A A A A A A A A A A A A A 55,771 A Circles MaharashtraA A A A A A A A A A A A A A A 42,998 GujaratA A A A A A A A A A A A A A A A A A A A A A A 31,852 Andhra PradeshA A A A A A A A A A A 43,661 KarnatakaA A A A A A A A A A A A A A A A A A 39,093 Tamil NaduA A A A A A A A A A A A A A A A 52,075 TotalA A A A A A A A A A A A A A A A A A A A A A A 2,09,679 Fig 4. A roof top Mobile tower in Bhubaneswar utilizing intercrossed grid-DGB Circles KeralaA A A A A A A A A A A A A A A A A A A A A A A A 27.156 Fig.3 A BTS system PunjabA A A A A A A A A A A A A A A A A A A A A A A A 19,575 HaryanaA A A A A A A A A A A A A A A A A A A A A 13,883 UPA A A A A A A A A A A A A A A A A A A A A A A A A A A A A 68,487 RajasthanA A A A A A A A A A A A A A A A A A A 28,694 Madhya PradeshA A A A A A A A A A A 31,665 West BengalA A A A A A A A A A A A A A A 24,532 TotalA A A A A A A A A A A A A A A A A A A A A A A 2,13,992 C Circles Himachal PradeshA A A A A A A A A 5,425 BiharA A A A A A A A A A A A A A A A A A A A A A A A A A 35,086 OrissaA A A A A A A A A A A A A A A A A A A A A A A A 18,095 AssamA A A A A A A A A A A A A A A A A A A A A A A A A 9,610 North EastA A A A A A A A A A A A A A A A A A A 5,490 Jammu & A ; KashmirA A A A A A A A 7,128 TotalA A A A A A A A A A A A A A A A A A A A A A A A A A 80,834 Grand TotalA A A A A A A A A A A A A A 560,276DecisionTo cut down CO2 emanation and planetary heating due to telecom towers, Govt. should do it compulsory to telecom companies to utilize renewable energy.Govt. should halt subsidy on Diesel for telecom companies. More inducements should be given to those who use renewable energy for their towers.

Mid-Term Test: American Literature Essay

1) According to the U. S. Declaration of Independence (1776), what are the fundamental rights that all men are born with and cannot be deprived from? a) Freedom, Equality and Democracy b) Life, Liberty and the Pursuit of Happiness c) Life, Freedom and Equality d) Freedom, Equality and the Pursuit of Happiness . 2) Which of the followings is NOT true about American culture? a) It is racially and ethnically diverse b) It is influenced by Native American, Asian and Polynesian cultures among others. c) Cultural patterns are exactly the same throughout the whole country. d)  British culture contributes greatly to its formation. . 3) Which of the following authors doesn’t belong to the ‘Lost Generation’? a) Ernest Hemingway B) HARPER LEE C) F. SCOTT FITZGERALD d) Gertrude Stein . 4) In your own words, briefly explain what you understand about the Iceberg Theory and The THEORY OF OMISSION IN E. HEMINGWAY’S WRITING STYLE? HOW DID HEMINGWAY’S EXPERIENCE IN WORLD War I influence his works? Correct answer not provided. 5) In the short story Soldier’s Home by Ernest Hemingway, Krebs has to face the following problems EXCEPT: a) He doesn’t have enough money to start a new life. B) HE CANNOT INNITIATE A RELATIONSHIP WITH ANY GIRLS. C) HIS FAMILY MAKES HIM DO THINGS HE DOESN’T WANT TO. d) He cannot reconnect with his old life before the war. . 6) In the short story University Days, what issue in the college education system did James Thurber want to point out when he mentioned the story that happened to the football player during Economics Class? a) The lack of fairness in the system. b) The lack of consideration for students’ individual abilities and differences. c) The lack of practicality in some lessons. d) The lack of proper management in the classroom. 7)IN THE NOVEL THE COLOR PURPLE BY ALICE WALKER, ALL OF THE FOLLOWINGS ISSUES ARE MENTIONED EXCEPT a) The inequality between black people and white people b) Sexist views on gender roles in the family and society c) The abuse of power by authoritative figures d) Competitive relationships among siblings . 8) BRIEFLY ANALYZE THE REASONS WHY CELIE ENDURES THE ABUSE BY HER STEP-FATHER AND HUSBAND without defending herself or fighting back. How does she overcome these hindrances to become an independent woman in the end? Correct answer not provided. 9) THE PULITZER PRIZE IS AN AWARD FOR ACHIEVEMENTS IN: a) Literature, musical composition and drama B) POETRY, ONLINE JOURNALISM AND MUSICAL PERFORMANCE c) Fiction, journalism and social activities d) Online journalism, musical composition and literature . 10) In the short story ‘A good man is hard to find’ by Flannery O’Connor, what does The Misfit mean WHEN HE SAYS ‘†SHE WOULD OF BEEN A GOOD WOMAN IF IT HAD BEEN SOMEBODY THERE TO SHOOT HER every minute of her life. † ? a) The Grandmother should have been taught to behave like a lady. b) The Grandmother only became a decent human when she is threatened with death. c) The Grandmother needed someone to control her throughout her life d) The Grandmother didn’t deserve to live. . 11) In ‘Brokeback Mountain’, why didn’t Ennis agree to leave and start a new life with Jack? You can choose more than one answer (however, wrong choices will cost you marks). a) He is concerned about financial issues. B) HE IS AFRAID THAT JACK’S MARRIAGE WOULD BE DAMAGED C) HE IS OBSESSED WITH AN INCIDENT FROM HIS CHILDHOOD. d) He doesn’t like living on a ranch. e) He is worried about the judgement of other people. f) He fears for his safety. g) He is still responsible for his daughters. . 12) WHAT DOES BROKEBACK MOUNTAIN MEAN TO THE MAIN CHARACTERS IN THE STORY WITH THE SAME NAME by Annie Proulx? a) The freedom to live as their true selves b) A reminder of their youthful days c) A place where they have no responsibilities and obligations d) The place where they go every year for their trips . 13) IN THE NOVEL LOVE STORY BY ERICH SEGAL, WHAT IS THE MOST SIGNIFICANT CHARACTERISTIC OF THE relationship between Oliver Barrett IV and his father? a) Oliver is always jealous of his father for his achievements in sports b) Oliver hates the pressure and expectation that his father put on him c) Oliver wishes that his father would spend more time talking to him d) Oliver wishes that his father would provide him with more money. . MATCH THE AUTHORS WITH THEIR WORKS (BY WRITING DOWN THE LETTERS OF YOUR CHOICES) 14) B ERNEST HEMINGWAY 15) e J. D. Salinger 16) c Mark Twain 17) a F. Scott Fitzgerald 18) d Harper Lee . A) THE GREAT GATSBY b) A Farewell to Arms c) The Adventures of Huckleberry Finn d) To Kill a Mocking Bird e) Catcher in the Rye . —————————————— THIS IS THE END OF THE TEST. GOOD LUCK!

Ontological Arguments About The Divine Command Theory Of Morality Essay

Ontological Arguments About The Divine Command Theory Of Morality - Essay Example Plato argues against every other theory that beats the logic of God in that God can only condemn something because it is wrong and something is condemned by the gods because it is wrong. Plato goes disowns the theory by bringing out a logical argument based on what he believes to the truth, especially on the concept of right and wrong and their relationship with the gods. On this topic, he brings up the issue of morality and immorality and the views of the gods on it based on why an action can be moral or immoral based on his argument with Euthyphro. In this case, he asks what if the gods considered what they asked to be done as the correct thing, despite being an immoral thing and one that inflicts pain and suffering amongst the people. In his objection against the theory, Plato argues the theory because it means that the gods that determine morality and human behavior by vouching for or criticizing it. For this reason, the foundation of morality in the case of the divine command th eory of morality, morality becomes an arbitrary issue (Austin). ... Logically, this does not make sense since Plato believes in a state of unambiguity, where such dilemmas do not come up; thus, there must be another form that guides morality. Another argument, by Plato against divine command theory of morality, is that if gods do not call the arbitral change in morality, then they must be mere spectators. This is to mean that they just act as beings with the ability to recognize right and wrong, and cannot direct ethics, which is based on the argument that the gods condemn something because it is wrong. To Plato, this is another absurd idea and basis of morality as it puts the gods at the same as a man; because man can also recognize right from wrong based on the law.

The Medium is the Message Essay Example | Topics and Well Written Essays - 1000 words

The Medium is the Message - Essay Example The first sign was from a Prudential magazine advertisement that appeared in the New Yorker. With this concept in mind it’s clear that the denotative intentions of the advertiser were to reach a more educated audience, who already has a general understanding of financial aspects and upper-level vocabulary and comprehension skills. In these regards, the extent the audience is clearly middle to upper class and educated. There are a great many visual techniques elements in the signification mechanisms in the advertisement. The first notable concept is that the advertising consists of a full page spread with an entirely dark blue background. The effect of this sign is such that it creates a juxtaposing effect in relation to the heavy text-based stories that constitute the majority of the magazine. In terms of specific pictures, in the upper-right hand of the advertisement a city backdrop is pictured in muted-tones. The signification of this imagery seems to indicate that Prudentia l has an urban feel, perhaps reminiscent of Wall Street. This is further indicative of an understanding of financial systems as being rooted in industrial or urban life. The very functions of the urban experience demonstrate the gear and wheels of the working economy; indeed, right next to the picture of buildings are pictures of gears in motion that connotatively demonstrate this point. Pictured even further to the left of these individuals is a small man in yellow. The implication of this signs seems to empathize with the potential customer or client. In essence, the advertising is situating the reader in the position of the small man in yellow, and the Prudential advertisement is saying that through going to Prudential for financial advice will result in the individual being able to navigate this challenging urban environment. The overall signification of the advertisement seems to indicate that through Prudential’s experience the reader will be able to navigate the challe nges of the contemporary financial environment. It implements contrast to bring out the heading ‘Bring Your Challenges’ which also signifies the denotative theme of the advertisement (New Yorker). It also displays this theme in connotative ways through the juxtaposition of the small man in yellow and the city backdrop. Ultimately, the advertisement sign has a denotative theme – ‘Bring Your Challenges’ – that is connoted through textual and visual ways as a means of appealing to the reader with the greatest possible emotional impact. The next advertisement considered is from ESPN the Magazine. The advertisement is for an online poker site, PokerStars.net. The denotative sign consists of an individual in the background sitting next to a poker table. The individual appears to be throwing grenades onto the table. In the foreground there is a picture of an individual’s hand holding two playing cards. Above the cards are the words ‘figh t or flight’ (ESPN the Magazine). Perhaps most notable about this sign in relation to the sign that was featured in the New Yorker is the drastically less amount of text that is implemented. One can make an ideological statement on this, indicating that it represents the decreased median education level of readers of ESPN the Magazine as compared to the New Yorker. In terms of the