Benefits of Nanotechnology on Health and the Environment

Benefits of Nanotechnology on Health and the Environment Aleksandar Banic Abstract Nanotechnology is concerned with manipulating matter to near atomic scales between one and 100nm (nanometers-1 billionth of a meter). This technology has recently gained popularity due to its potential in altering the behaviour of individual molecules and has opened the door to new applications. Many researchers have pinpointed the potential risk of nanotechnology on the environment and on human health. This is due to the fact that the extremely small nanoparticles can penetrate into human cells. This paper aims at determining ways in which this new technology can benefit the environment and the state of people’s health. Typical expectations of functional paints and coatings include: durability, reproducibility, easy application and cost effectiveness, tailored surface morphology and environmental friendliness. Through the use of nanotechnology, these properties can be achieved; therefore inflicting less environmental damage and cost. Discussion As shown in figure 1 (refer to appendix), the list of benefits for paints containing nanoparticles is extensive. It is also apparent that nano titanium dioxide (TiO2) is one of the most common nanoparticles in both the paint and lacquer industries. The primary reason for this is its ability to make the paint more durable (refer to figure 2 for following references). The wavelength of the visible light spectrum ranges between 400 and 700nm, whereas TiO2 is much shorter (200-350nm). This property renders the coating transparent and more aesthetically pleasing whilst also allowing UV absorption smaller wavelength means more energy. Therefore, when moving from left to right in figure 2, the different types of radiation become increasingly destructive. During UV radiation, UV photons can cause ionization, where electrons break away from atoms and this vacancy affects chemical properties. As a result, the paint could begin to flake, otherwise known as ‘chalking’ where it is th en washed away into the environment (1)(2)(3). Nano TiO2 coating serves to prevent this and is therefore considered to be an advantage to the environment. As durability is increased, the longevity of the paint does likewise and therefore, the rate of production is lowered. This means that energy and resource outputs are decreased, thus benefiting the environment once more. Figure 2: electromagnetic spectrum image displaying frequency and wavelength. Also highlights visible spectrum (3) One of the most advantageous characteristics of nanoparticle paints and coatings is their self-cleansing property. Nano scale titanium dioxide (TiO2) is the most often employed nanoparticle that exhibits this property. As TiO2 is photo catalytic, when illuminated with an ultraviolet (UV) source (e.g. sunlight) in the presence of water, valence electrons are transferred into the conduction band of TiO2 and then react with oxygen. Super oxide radicals result. These photo-produced radicals are powerful oxidizing species and can cause the deterioration of organic contaminants or microbial pieces on the particle surface. Furthermore, nano TiO2 is super-hydrophilic, i.e. the entire surface attracts and spreads water out into a thin film (4). Therefore, water and rainfall easily wash away contaminants when the coating is applied on an exterior surface. Figure 3: Hydrophilic coating (right) with TiO2on float glass for comparative purposes. Notice how right side is spread out thinly to cover as much surface as possible. This allows for a more consistent cleaning (4). Self-cleaning surfaces can decrease the amount of cleaning required. In the case of industrial cleaning in particular it can reduce labour costs and extend a materials durability. Lower energy costs and less use of cleaning detergents are expected to be the primary environmental benefits (5). In fact, nano TiO2 was proven to achieve the following: Reduction in re-paint material consumption by over 75% Reduction in labour and energy costs by 50% In summary, the photo catalytic and hydrophilic features of nano T (Environmental Protection Agency , 2015)iO2 result in the benefit of self-cleaning. When compared to that of standard paints, this is also beneficial to the environment whilst also being more cost effective. In addition, paints coated in nano TiO2 have also managed to reduce surface pollution. Paint which photocleans the air of automobile-produced nitrogen oxides (NOx) is currently under heavy promotion. NOx are formed during the combustion process when nitrogen (N) and oxygen (O) are present at elevated temperatures. They also serve as key precursors for ozone and this can lead to numerous health effects as outlined in the figure below. Figure 4: The relationship between the severity of the effect and the proportion of the population experiencing the effect can be presented as a pyramid. Many individuals experience the least serious, most common effects shown at the bottom. Fewer individuals experience the more severe effects such as hospitalization or death; however, they are still possibilities especially after prior health issues or prolonged exposure (6). In the presence of sunlight, TiO2 nanoparticles in the paint, form hydroxyl and peroxyl radicals, which then react with NOx in the air to produce nitric acid. This reacts further with calcium carbonate in the paint matrix to generate minute quantities of calcium nitrate, water, and carbon dioxide (CO2). Calcium nitrate is especially useful as a fertilizer; therefore it is not harmful to the environment. And although CO2 is considered a greenhouse gas, it is nontoxic (7)(8). Figure 5: graph compares the surface area covered by anatase (one of the three forms of TiO2) to the % of NOx removed from that vicinity. Eventually it will plateau as the production of NOx will be no longer be able to reduce by more than is being created (7) In an experiment, a 4,100m2 wall was subjected to paint containing TiO2 nanoparticles. Results showed that each square meter could remove 80g of NOx from the atmosphere per year. Furthermore, NOx levels in the vicinity of the wall were compared to that of other areas of the city and a 57% decrease was found. It can be concluded from this information that health effects would also be lowered proportionally (8). As the effects of nano TiO2 particles in paint are evidently advantageous, it supports the statement that in general, the positives of nanoparticles outweigh the negatives. If nanoparticles are firmly imbedded within a coating matrix, current risk assessments conclude that the probability of a harmful impact on the environment is very low. However, nanoparticles may be released as a result of weathering on the coating matrix. An investigation conducted in 2010, has shown that very small amounts of TiO2 (between 20 and 300nm in size) are released by house paints due to weathering. They can then enter the soil via rainwater drains. As stated previously, the photocatalytic activities of TiO2 are able to produce oxygen radicals. They are in fact toxic for aquatic organisms. However, the release of nanoparticles into the environment can be reduced or prevented if nanomaterials and coatings are designed accordingly. Regardless of the fact that surface coatings which contain firmly embedded nanoparticles currently pose a minute risk to the health of users and consumers, special attention is required for those that manufacture nanoparticulate raw materials. (4) (9) (Chang)Nevertheless, there are currently no known long-term health effects as a result of nanoparticle paint, and the short-term effects are easily reduced or prevented when safety measures are taken accordingly. Although possible health and environmental effects may exist, they are unsupported and easily outweighed by the positives of nanoparticle paints. Conclusion Several advantages for nanoparticles used in paint and lacquer have been focused on throughout this paper. Although many more are possible as outlined in figure 1 (appendix), it is evident from the properties of UV absorption, self-cleansing and NOx reduction alone, that it overcomes the unfounded negative impacts. In fact, the only undesirable aspect is the danger that nanoparticles could inflict upon the appliers and manufacturers. However, there is very little supporting evidence and can therefore not be used as a counter argument for the use of nanoparticle paints. It is important that the public understands how beneficial this technology is they would be doing themselves and the environment a great disservice. Bibliography Wick, P. (2012). Nanoparticles in paints: A new strategy to protect faà §ades and surfaces? . International Conferences on Safe Production and Use of Nanomaterials , 10. Popov, A. (2008). TiO2 NANOPARTICLES AS UV PROTECTORS. UNIVERSITATIS OULUENSIS. OULUN YLIOPISTO. New World Encyclopedia. (n.d.). Electromagnetic Spectrum. Retrieved May 4, 2015, from New World Encyclopedia: http://www.newworldencyclopedia.org/entry/Electromagnetic_spectrum Nanotechnology solutions for self-cleaning, dirt and water-repellent coatings . (2011, January 11). Retrieved May 4, 2015, from Nano Werk: http://www.nanowerk.com/spotlight/spotid=19644.php Environmental Protection Agency . (2015, January 31). Health Effects of Ozone in the General Population. Retrieved May 5, 2015, from Ozone and Your Patients Health Training for Health Care Providers: http://www.epa.gov/apti/ozonehealth/population.html Dalton, J. (2002). Photocatalytic oxidation of NOx gases using TiO2: a surface spectroscopic approach. Elsevier . Bendak, S. (2010). Potential Environmental and Health Benefits of Nanotechnology. Journal of Materials Science and Engineering , 4 (1), 2. Joseph, R. (2011). Nanotechnology-A New Prospective in Organic Coating Review. International Journal of Chemical Engineering and Applications , 2 (4). Chang, X. Health effects of exposure to nano-TiO2: a meta-analysis of experimental studies. Nanjing : Springer . Appendix Figure 1: above table states the various advantages of nanoparticle paints and coatings along with their respective nanomaterial and industrial branch (1) Bibliography (Popov, 2008) (New World Encyclopedia) (Nanotechnology solutions for self-cleaning, dirt and water-repellent coatings Read more: Nanotechnology solutions for self-cleaning, dirt and water-repellent coatings , 2011) (Wick, 2012)

Misguided Messages in The Awakening and A Dolls House :: comparison compare contrast essays

Misguided Messages in The Awakening and A Doll's House      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Just because a novel is considered a classic doesn't mean the Messages it conveys to its readers are correct.   Even though both The Awakening by Kate Chopin and A Doll's House by Henrik Ibsen are great literary works, some of the ideas embodied in them aren't appropriate. Both works suggest that it is common for husbands to be condescending to their wives; that if a person has enough money, they can have someone else raise their children for them; and that if a marriage gets hard, the couple should just give up on each other.      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Taking the stories for their literary qualities alone, they are both quite good.   Both novels are very well written.   Chopin and Ibsen developed their characters well, used excellent imagery, and told interesting stories.   Both shared their strong convictions even though they knew their ideas weren't popular.   The strong beliefs that are shared in these stories are part of what makes them classics.      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   However, some of the ideas that are portrayed in these works aren't ideas readers should assume to be true or good.   The first of these is the theory that husbands will most likely treat their wives as inferiors after they are married.   In A Doll's House, Torvald is blatantly condescending to Nora.   He calls her his  ³little squirrel ² or  ³little skylark ² and requires her to  ³do tricks ² to please him.   In addition, he treats her like a child, a  ³feather head ² who can't understand anything important.   In The Awakening, Leonce is more subtle in his mistreatment of his wife.   He tries to control Edna by pushing his point until she does what he wants.   He also tries to make her feel bad about herself.   For example, he tells her she isn't a good mother to their sons.   Although this type of behavior is condemned in both of these stories, just characterizing this behavior as normal sends a bad message.   If young men are repeatedly told that this is how adult males act, they will inevitably feel that they should act this way when they are married.      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The second bad idea conveyed by these stories is that if a person can afford to, they should have someone else raise their children for them. In A Doll's House, Nora and Torvald have a nanny who takes care of their children for them.   This is the same nanny who Nora's parents had paid to raise her.   Also, in The Awakening, Leonce and Edna not only have a person who takes care of their children for them; but, when Edna moves to the

Exam Marketing Essay

Please put your name and student number (both, in digits and by filling the boxes) on your answer sheet. After finishing the exam you will hand in your answer sheet. Fill in the correct version code at the bottom right of the answer form by filling the correct box. Version 1 Warning against fraud: In the case of fraud the maximum punishment is exclusion from all examinations for one year. Your mobile phone should be switched off and should be put in your bag. Your bag should be closed and placed on the floor to the left of your desk. During the examination you are not allowed to go to the toilet unless the co- rdinating invigilator gives you permission to do so. Tools allowed: pencils, eraser, English-native language dictionary. (no books or notes. ) Specific information on this examination: This exam consists of 60 Multiple Choice Questions with 4 alternatives each. Choose the one alternative that best completes the statement or answers the question, and mark your answers on the answer form by filling the boxes. A computer will read your answers. The result of this examination will be published within 18 working days after the date of this examination. Reviewing the examination: Specific information on procedure and planning will be posted on Blackboard. Good luck with the exam! MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Car rental firms, hair dressers, and management consultants provide goods B) experiences C) events D) services 2) Julia is worried about the rising pollution levels in her city. She doesn’t mind paying extra for goods and services that use sustainable processes to help control A) declining demand B) nonexistent demand C) latent demand D) negative demand 3) Marketers must see themselves as benefit providers. For example, when a shopper purchases new shoes, he/she expects the shoes to cover his/her feet and allow him/ her to walk unobstructed. This is an example of what level in the consumer-value hierarchy? A) pure tangible good B) basic product C) augmented product D) potential product 4) Which aspect of holistic marketing motivates employees and ensures that everyone in the organization embraces appropriate marketing principles, especially senior management? A) relationship marketing B) integrated marketing C) internal marketing D) performance marketing 5) The number of different persons or households exposed to a particular media chedule at least once during a specified time period is known as A) range B) impact C) reach D) frequency 6) A company that seeks to increase its sales and profits through backward, forward, or horizontal integration within the industry is said to be employing a(n) strategy. A) diversification growth B) intensive growth C) integrative growth D) conglomerate growth 7) The is the last section of the marketing plan and spells out the goals and budget for each month or quarter, so management can review each period’s results and take action as needed. A) situation analysis B) marketing strategy C) financial projections D) implementation and controls 2 8) The internal records system supplies results data, but the marketing intelligence system supplies A) internal B) revenue C) thematic D) happenings data. ocial institutions†schools, churches, businesses, and governments; they are very difficult to change. A) Transient B) Secondary C) core D) Variable 10) A company can take several steps to improve the quality of its marketing intelligence. If the company purchases competitive products for study, attends open houses and trade shows, and reads competitors’ published reports and stockholder information, the company is using ntelligence. A) sales-force surrogates B) intermediaries C) external networks D) advisory panels to improve the quality of its marketing 1 1) If the goal of marketing research is to shed light on the real nature of a problem and to suggest possible solutions or new ideas, the research is said to be descriptive B) quantitative C) secondary D) exploratory approach uses concepts and tools from anthropology and other social science disciplines to provide deep cultural understanding of how people live and work. A) Cognitive research B) Archaeological research C) Ethnographic research D) Deductive research llow respondents to answer in their own words and often reveal more about how people think. A) Open-end questions B) Dichotomous questions C) Likert scale questions D) Multiple choice questions 14) The bundle of costs customers expect to incur in evaluating, obtaining, using, and disposing of the given market offering is called the A) activity-based cost B) customer profitability analysis C) total customer cost D) product life-cycle cost 3 15) Field Grocery wants to learn the strengths and weaknesses in customer service at all the Field Grocery stores. Which of the following methods can it use for this? A) roup buyers C) mystery shoppers D) buying agents 16) The aim of customer relationship management is to produce high customer . A) integrity B) loyalty C) innovation D) liability 17) If a marketer decides to segment a market based on neighborhoods, the marketer will have chosen the A) demographic B) psychographic C) geographic D) cultural method of segmentation. 18) If a marketing manager employs such marketing techniques as online buzz, student ambassadors, cool events, and street teams to reach target markets, the manager is most likely appealing to the A) Generation X B) Generation Y C) Silent generation D) Baby boomers market. 19) General Motors, a leading American multinational automaker, sells cars for every purpose, purse, and personality. This is an example of A) undifferentiated B) differentiated C) concentrated D) niche 20) According to the VALS segmentation system, marketing. are considered to be trendy and funloving people who are resource-constrained. They favor stylish products that emulate the purchases of those with greater material wealth. A) strivers B) survivors C) experiencers D) makers 21) Brand B) equity C) preference D) identity is the added value endowed to products and services. A) loyalty 22) According to the brand asset valuator model, which of the components of brand equity measures how aware and familiar consumers are with the brand? A) esteem 4 B) energized differentiation C) relevance 23) The introduction of diet coke by the Coca Cola Company is an example of A) line extension B) brand harmonization C) brand dilution D) co-branding 24) Which of the following terms is most closely associated with the statement: â€Å"attributes or benefits consumers strongly associate with a brand, positively evaluate, and believe that they could not find to the same extent with a competitive brand†? A) points-of-inflection B) points-of-difference C) points-of-parity D) points-of-value 25) are visual representations of consumer perceptions and preferences. A) Procedural maps B) Brain maps C) Perceptual maps D) Procedural models 26) Singapore Airlines is well regarded in large part because of the excellence of its flight attendants. This is an example of differentiation. A) image B) services C) product D) employee 27) When Starbucks introduced its Tazo Tea line to bring in new customers who had never gone to Starbucks because they dont drink coffee, Starbucks was employing a trategy. A) market-penetration B) new-market segment C) geographical-expansion D) niche identification 28) An alternative to being a market follower in a large market is to be a leader in a small market. This type of competitor is called a A) marketing king B) market nicher C) segment king D) guerilla marketer 29) is a slowdown in sales growth because the product has achieved acceptance by most potential buyers. A) Introduction B) Growth C) Decline D) Maturity 5 30) The marketing concept holds that for its products B) customers who are coaxed into buying a product will most likely uy it again C) a new product will not be successful unless it is priced, distributed, and sold properly D) consumers and businesses, if left alone, won’t buy enough of the organization’s products 31) What types of goods are purchased frequently, immediately, and with minimum effort by the consumers? A) specialty goods B) shopping goods C) unsought goods D) convenience goods 32) We define packaging as all the activities of designing and producing the container for a product. This includes up to three levels of material: primary package, secondary package, and B) design package C) shipping package D) consumer package . A) retailer package 33) Which of the following is an example of a hybrid service? A) teaching B) car C) restaurant meal D) soap 34) Services high in have characteristics that the buyers can evaluate before purchase. A) search qualities B) experience qualities C) credence qualities D) privacy qualities 35) Jake had an appointment at the doctor’s, but couldn’t make it on time because he was caught in traffic. By the time he reached the doctor’s office, the doctor had already begun with the next patient. This illustrates the A) variability B) heterogeneity C) perishability D) intangibility f services. 36) Companies who believe that a higher sales volume leads to lower unit costs and higher long-run profits are attempting to A) maximize their market share B) skim the market C) become a product-quality leader D) merely survive in the market 37) In which of the following auctions does the auctioneer first announce a high price for a product and then slowly decreases the price until a bidder accepts? A) an English auction with one seller and many buyers B) an ascending bid auction C) a sealed-bid auction 6 38) A(n) is an extra payment designed to gain reseller participation in special rograms. A) seasonal discount B) allowance C) discount D) quantity discount 39) When is a pull strategy appropriate? A) when there is low brand loyalty B) when consumers are able to perceive differences between brands C) when brand choice is made in the store D) when it is a low involvement purchase 40) Which of the following is an example of a zero-level channel? A) A company takes online orders from customers and ships the products to them. B) A company sells its products through wholesalers and retailers. C) A company sells its products through chains of supermarkets and other large sellers. D) A large company forms alliances with smaller companies to increase sales coverage. 41) A(n) includes the producer, wholesaler(s), and retailer(s) acting as a unified system. A) parallel marketing channel B) vertical marketing system C) internal marketing system D) conventional marketing channel 42) Which of the following types of retailing generally entails the highest costs? A) full-service B) self-service C) limited service D) self-selection 43) Which of the following is an example of a word-of-mouth marketing communication platform? A) chat rooms B) billboards C) factory tours D) incentive programs 4) Which of the following is true for franchisors? A) The franchisor has to pay the franchisee to be part of the franchise system. B) The franchisor licenses the trade mark from the franchisee. C) The franchisor must change its operations to suit those of the franchisee’s. D) The franchisor collects royalty payments from the franchisee. 5) Which of the following is an advantage of using the percentage-of-sales method to determine the marketing communications budget? A) The percentage-of-sales method encourages stability when competing firms spend approximately the same portion of their sales on communications. B) The percentage-of-sales method views sales as the determiner of communications rather than as the result. C) The percentage-of-sales method leads to a budget set by market opportunities rather than the availability of funds. by determining what each product and territory deserves. 46) Which of the following sequences accurately represents the hierarchy-of-effects model of marketing communications? A) attention-interest-desire-action B) awareness-interest-evaluation-trial-adoption C) awareness-knowledge-liking-preference-conviction-purchase D) exposure- reception-cognitive response-attitude-intention-behavior 47) A(n) ppeal is a creative strategy that elaborates on product or service attributes or benefits.

Pros and Cons of Illegal Immigration Essay example

Many people have come to America for a better life and to get away from all the troubles of their homeland. These immigrants, like those throughout U.S. history, are generally hard workers and make important contributions to the economy through their productive labor and purchasing power. America is considered a melting pot of many diffrent ethinic group. Immigrants should be able to enter America with little if any resistance from any border patrol. Immigrants in america take the low paying, hard labor jobs that , unfortunately, some americans dont want. Most immigrants usually fill essential service jobs in the economy, which are vacant. Unfortunately, like new immigrants throughout U.S. history, â€Å"they experience conditions that are†¦show more content†¦Poor countries have had to sell state industries and open national borders to in order to meet a new economic order and payment of international debts. This process has restricted markets for home industries, driven out local producers, and forced people to immigrate. The U.S. borders can never be sealed, because millions of people are seeking ways to support their families, so will come to where jobs are available. Furthermore, American businesses want and need these workers. While the multinational corporations and their rich investors benefit from corporate welfare deals and seek out havens to avoid supporting society with their taxes, ordinary Americans have to pick up their tab. This situation sounds familiar in American labor history, where immigrants have been a mainstay in the national workforce. It wasnt until the labor movement gained strength that workers in the U.S. were able to turn â€Å"exploitive jobs into occupations that enabled them to support their families and improve their living conditions† (Dougherty, 2004). 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