The Effect Of Emulsion Polymerization Technology On Large...

Monodisperse sub-200nm polystyrene nanoparticles were synthesized by a facile one-step emulsion polymerization technology using sodium dodecyl sulfonate (SDS) and 2, 2†²-azobis (2-methylpropionamide) dihydrochloride (AIBA) as the surfactant and initiator, respectively. The in situ neutralization between negatively charged surfactant SDS and positively charged AIBA was used to control the primary particle (or swollen micelle) volume and the extent of the particle coagulation. As the oligomeric radicals with cationic AIBA chain ends were captured by anionic swollen micelles, the electrostatic stability of swollen micelles gradually reduced, further promoting the primary particle coagulation. As a result, the initial particle number decreased with the addition of AIBA. The earlier primary particle coagulation not only enlarged the particle size, but also narrowed the particle size distribution of the final latex particles. This approach was easy to scale-up as a facile industrial t echnology to produce monodisperse polymeric nanoparticles on large scale. Keywords: Emulsion polymerization; Nanoparticle; Monodisperse; Particle coagulation; AIBA 1. Introduction Emulsion polymerization technology is widely applied in many fields including synthetic rubber, thermoplastics, coating, adhesive, and plastic modifier [1–4]. Much of the interest in it derives from the possibilities for the preparation of monodisperse or functional latex particles [5,6]. Until today, the challengesShow MoreRelatedFood Protein Derived Bioactive Peptides ( Bps )5959 Words   |  24 Pagesto their huge potential of use in functional foods and other dietary interventions of disease control and health promotion. However, successful product development is limited by the fact that current manufacturing processes are either difficult to scale up, high in cost, or have the potential to affect the structure-activity properties of these peptides. To overcome these challenges, we have proposed in this review, the use of omic techniques and high throughput simulation models to forecast theRead MoreEvolution Of Nanoscale Science And Technology5337 Words   |  22 Page sand Nanotechnologies have become more significant and have found a lot of applications in many aspects; the synthesis making nanostructured materials with helpful and tunable properties is central to the evolution of nanoscale science and technology. Nanometre scale metal particles exhibit optical, electronic, magnetic and chemical properties which have wonderful technological and scholar value. Among them silver, copper, and gold nanoparticles (NP) offer powerful adsorption bands (Localised SurfaceRead MoreBrief Historical Development and Contributions of Chemistry for Modern Civilization4507 Words   |  19 Pagesresources like ores, rocks, coal, and gas. According to me, Chemistry is the study of the composition and properties of matter. Chemistry answers questions like, What kind of stuff is this sample made of? What does the sample look like on a molecular scale? How does the structure of the material determine its properties? How do the properties of the material change when I increase temperature, or pressure, or some other environmental variable? Chemistry is the study of the reactivity of substances. OneRead MoreThe Extraction of Pectin from Orange Peels13647 Words   |  55 Pages- - - 43-44 CHAPTER FOUR 4.0 Experimental Results and Discussion - - - 45 4.1 Experimental Results - - - - - - 45 4.2 Discussion of Results - - - - - - 48 4.2.1 Effect of Pre-treatment on the yield of Pectin - - 48 2. Effect of Concentration Agent of Extracting Agent on the Yield - - - - - - 48-49 4.2.3 Effect of precipitating Agent on the Yield of pectin - 49 4.2 .2 Colloidal stabilizations of milk solution - - - 49 4.3 Conclusion and Recommendation - - - - 53 REFRENCES -Read MoreDesigning A New Type Of Internal Combustion Engine10284 Words   |  42 Pagesoxides of nitrogen (NOx) and particulate matter (PM). NOx and PM are the two primary pollutants of diesel engines. It was stated by Lloyd and Cackete, that Diesel emissions contribute to the development of cancer; cardiovascular and respiratory health effects; pollution of air, water, and soil; soiling; reductions in visibility; and global climate change. Research on reducing emissions resulted from diesel engines and studies on decreased fuel consumption are being founded worldwide, especially in EU countries

Philosophy Life Examination Free Essays

My Life Examination First of all, my previous essay was a part of my life examination. I am glad you caught me on plagiarizing because now I really know that you read all of our essays. Unfortunately a few of my classmates and I did have doubts about it. We will write a custom essay sample on Philosophy Life Examination or any similar topic only for you Order Now Also, I feel like I can argue a lot for plagiarizing, but that is not what this assignment is about. Even though I agree with Sergey Trufanov’s ideas about life in general, I do not feel like I can explore them further and simply reciting them would also be considered as plagiarism. But I do have my own conclusions about life examination, disappointments, and death. I cannot say that I am a philosopher, just like I cannot say that I can speak English. In order to claim that, a person needs to be comfortable using his tools to be considered a professional, which unfortunately, I am not, but I do believe that my ideas deserve to exist and to be explored in philosophical ways. Life examination. To examine life you need to test it, challenge it. Everyone knows that you won’t know till you try, but for some reason not everyone does it. In my opinion it is better to do something and regret it than not do anything and regret not even trying. It refers even to the smallest things, like a new flavor of ice-cream. How would you know that you do not like it unless you taste it? Trying things is the only way to figure them out. I have so much of personal experience about trying new things, and it proved itself every single time. Like when I came to United States five years ago; I did not speak a word of English, I did not know how to drive, I was scared beyond belief, but trying new things got me to where I am. It is okay to be scared, but it is not okay not to challenge your fears and examine life in every way possible with everything that raises questions. Here I agree with Socrates â€Å"The unexamined life is not worth living. † Disappointments. Disappointments are worthless. They are based on our expectations of results. If you do not want to be disappointed, stop waiting for things and people to meet your expectations. We all are our own people. We do not live to please everyone around us. Why expect everyone around me to please me, if I am not doing it for everyone else? Why expect a sunny day and get disappointed if it rains? I am not the center of the universe, so why should it be sunny for me? We are causing things to upset us and at the same time we are blaming everyone and everything else. Of course people are selfish, it is just a human nature, but if we are selfish, why do we let things ruin our lives simply by expecting good things to happen? Everyone is trying to do whatever makes them happy and feels good. Why get disappointed if it upsets us. People are so controversial. Death. I agree with Arthur Schopenhauer on the subject of death. Crying for dead is like crying for someone who was never born. Why we are so scared of death? We all know that we are going to die, so I believe that being ready for it is more important than being scared of it. But how can we be ready? Well, examining life to its fullest would do the trick. Doing new things, answering questions, exploring the unknown, all of that makes death just one of the projects. Possibly one the last ones, but we do not know, till we try. We are scared of death because we do not know what is waiting for us after we leave this world and this life. But exploring everything here and now makes it easier and simpler to move on and accept the fact that we are done. Thinking that after we die the world will not be the same is just another example of human selfishness. How many people have died before us? How many will die after? And the universe is still here, it is still growing, it is still alive. One death is just one drop in the ocean; it will not change the world. And Schopenhauer’s quote â€Å"Matter, which now lies before you as dust and ashes now, dissolved in water, will settle as crystal, will shine in a metal, scatter electric sparks in a galvanic voltage show the power, that by expanding the strongest connection, turn the earth mass into metal; and not only that: by itself it will embody in plant and animal, from its mysterious womb will produce the very life, the loss of which you are so afraid of in your narrow-mindedness† shows that we never die completely, therefore being afraid of death thinking that without us the world will not be the same is very much silly. As you can see, in this essay I did not use any philosophical terms, but this is My Life Examination, in my life I do not use terms, I use simple language because like Einstein said â€Å"If you can’t explain it simply, you don’t understand it well enough. † How to cite Philosophy Life Examination, Essay examples

Bilingual Education Is It Hel Essay Research free essay sample

Bilingual Education: Is It Hel Essay, Research Paper Bilingual Education: Is it assisting or aching? Bilingual instruction seems to be a lifting subject that is presently up for argument. With the turning figure of immigrants come ining this state, the linguistic communication barrier between persons seems to be far greater when it comes to kids in the schoolroom. On norm it is said that here entirely in Tempe, schools have about 45 different linguistic communications to one schoolroom. Bilingual instruction is a privilege, non something that is to be taken for granted. Bilingual instruction demands to be removed so that the official linguistic communication of English can one time once more be the dominant and official linguistic communication of the United Sates. The cost of bilingual instruction entirely is something that should concern our state greatly. It has been said that bilingual instruction costs far more than English linguistic communication direction. Bilingual instruction requires extra staff preparation, instructional stuffs and disposal ; therefore these plans cost more than the regular English plans. We will write a custom essay sample on Bilingual Education Is It Hel Essay Research or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page ESL ( English as a 2nd linguistic communication ) is one of the more expensive plans yet one of the more favorite among the American school systems with bilingual instruction plans. The incremental cost of bilingual instruction is non excessively drastic, it ranges from state $ 175- $ 214, whereas the cost of ESL is about $ 1198. This ESL plan is when the kids are pulled out of the schoolroom to larn English instead than larning it in the schoolroom ( # 1 ) . There are a figure of plans that are non in favour of bilingual instruction and are making their best to buttonhole against it. English First, is an organisation against bilingual instruction and was foremost founded in 1986. They have three simple ends, which include doing English America s official linguistic communication, giving every kid a opportunity to larn English and extinguishing the cost of all uneffective multilingual policies. Presently, there are 140,000 Americans that have joined English First. Many have said that they are tired of the authorities utilizing the American s revenue enhancement money to split Americans based on a linguistic communication barrier ( # 11 ) . READ, is another organisation against bilingual instruction. READ is a national organisation that supports research on English acquisition and effectual schooling for linguistic communication minority kids ( # 12 ) . This institute was founded in 1989 and is a undertaking of the Equal Opportunity Foundation. The ends of READ is to advance public treatments and informed determinations by doing institutes possible for bookmans, pedagogues, policy shapers and citizens about the instruction of minority pupils ( # 12 ) . NABE is yet another organisation non in favour of bilingual instruction. NABE was founded in 1975 and is a National Association for Bilingual Education. NABE is a tax-free non-profit national rank organisation. Members of NABE include pedagogues, instructors, parents, community members and leaders of the community, authorities and concern organisations. NABE has made success a world for infinite linguistic communication minority pupils and their households ( # 14 ) . The ends of NABE are to prosecute the execution of educational policies and patterns which will guarantee the equality of educational chance for diverse kids ( # 14 ) . Bilingual instruction is a term which can intend different things for different people ( # 4 ) . Those advocators in favour of bilingual instruction favor the many different elements in which bilingual instruction an be used in the schoolroom. Submergence is a great method for theLEP ( limited English proficient ) pupil. This is when you place a minority kid on a schoolroom in which merely English is spoken. This method is frequently referred to as the sink or swim attack. ESL ( English as a 2nd linguistic communication ) is another popular signifier of bilingual eduction. The minority kid is placed in a normal English schoolroom for most the twenty-four hours but receives excess aid and direction in English excessively. The ESL instructor is non required to talk the native linguistic communication of the kid.

Privatization Essays - Market Structure, Monopoly, Privatization

Privatization Privatization What is Privatization? Privatization is the process of transferring productive operations and assets from the public sector to the private sector. Broadly defined in this fashion, privatization is much more than selling an enterprise to the highest bidder, as it includes contracting out, leasing, private sector financing of infrastructure projects, liquidation, mass privatization, etc. My testimony will argue that there is no single best approach to privatization; the appropriate privatization path depends on the goals that the government is seeking to attain, the individual circumstances facing the enterprise and the economic and political context of the country. It should be noted that privatization is fundamentally a political process as well as a commercial and economic process. Privatization changes the distribution of power within a society, as it diminishes control of the economy by the state and government- appointed managers. Workers often feel threatened by the potential changes inherent in privatization, although employees frequently benefit from the process. As a result, public support is a major consideration in any privatization program and many of the choices made in designing and implementing transactions reflect the need for such support. Two consequences flow from this factor. 1) choices of approaches are sometimes altered due to political considerations, meaning that equity must be promoted in the privatization strategy, and 2) program implementation must be objective and fair to avoid adverse publicity. What are the goals of privatization? Many goals are often pursued through privatization programs. These goals often fall along two principal dimensions: 1) broad social or macro economic goals, and 2) enterprise specific or macro economic goals. Macro economic goals are numerous. Fundamentally, privatization is advocated as a means to reduce the governments role in the economy, partly as a philosophical matter (as in the UK) but principally because governments have performed badly in that role. Many countries can attribute substantial portions of their external debt to liabilities of state-owned enterprises and significant portions of government budgets are devoted to paying subsidies or otherwise assisting loss-making State-owned enterprises. Government's objectives in these situations are often simply to extricate themselves from these financial commitments, and focus scarce

Terminal Velocity and Free Fall

Terminal Velocity and Free Fall Terminal velocity and free fall are two related concepts that tend to get confusing because they depend on whether or not a body is in empty space or in a fluid (e.g., and atmosphere or even water). Take a look at the definitions and equations of the terms, how they are related, and how fast a body falls in free fall or at terminal velocity under different conditions. Terminal Velocity Definition Terminal velocity is defined as the highest velocity that can be achieved by an object that is falling through a fluid, such as air or water. When terminal velocity is reached, the downward force of gravity is equal to the sum of the objects buoyancy and the drag force. An object a terminal velocity has zero net acceleration. Terminal Velocity Equation There are two particularly useful equations for finding terminal velocity. The first is for terminal velocity without taking into account buoyancy: Vt (2mg/Ï ACd)1/2 where: Vt is the terminal velocitym is the mass of the object that is fallingg is acceleration due to gravityCd is the drag coefficientÏ  is the density of the fluid through which the object is fallingA is the cross-sectional area projected by the object In liquids, in particular, its important to account for the buoyancy of the object. Archimedes principle is used to account for the displacement of volume (V) by the mass. The equation then becomes: Vt [2(m - Ï V)g/Ï ACd]1/2 Free Fall Definition The everyday use of the term free fall is not the same as the scientific definition. In common usage, a sky diver is considered to be in free fall upon achieving terminal velocity without a parachute. In actuality, the weight of the sky diver is supported by a cushion of air. Free fall is defined either according to Newtonian (classical) physics or in terms of general relativity. In classical mechanics, free fall describes the motion of a body when the only force acting upon it is gravity. The direction of the movement (up, down, etc.) is unimportant. If the gravitational field is uniform, it acts equally on all parts of the body, making it weightless or experiencing 0 g. Although it might seem strange, an object can be in free fall even when moving upward or at the top of its motion. A skydiver jumping from outside the atmosphere (like a HALO jump) very nearly achieves true terminal velocity and free fall. In general, as long as air resistance is negligible with respect to an objects weight, it can achieve free fall. Examples include: A spacecraft in space without a propulsion system engagedAn object thrown upwardAn object dropped from a drop tower or into a drop tubeA person jumping up In contrast, objects not in free fall include A flying birdA flying aircraft (because the wings provide lift)Using a parachute (because it counters gravity with drag and in some cases may provide lift)A skydiver not using a parachute (because the drag force equals his weight at terminal velocity) In general relativity, free fall is defined as the movement of a body along a geodesic, with gravity described as   space-time curvature. Free Fall Equation If an object is falling toward the surface of a planet and the force of gravity is much greater than the force of air resistance or else its velocity is much less than terminal velocity, the vertical velocity of free fall may be approximated as: vt gt v0 where: vt is the vertical velocity in meters per secondv0 is the initial velocity (m/s)g is the acceleration due to gravity (about 9.81 m/s2 near Earth)t is the elapsed time (s) How Fast Is Terminal Velocity? How Far Do You Fall? Because terminal velocity depends on drag and an objects cross section, there is no one speed for terminal velocity. In general, a person falling through the air on Earth reaches terminal velocity after about 12 seconds, which covers about 450 meters or 1500 feet. A skydiver in the belly-to-earth position reaches a terminal velocity of about 195 km/hr (54 m/s or 121 mph). If the skydiver pulls in his arms and legs, his cross section is decreased, increasing terminal velocity to about 320 km/hr (90 m/s or just under 200 mph). This is about the same as the terminal velocity achieved by a peregrine falcon diving for prey or for a bullet falling down after having been dropped or fired upward. The world record terminal velocity was set by Felix Baumgartner, who jumped from 39,000 meters and reached a terminal velocity of 134 km/hr (834 mph). References and Further Reading Huang, Jian (1999). Speed of a Skydiver (Terminal Velocity). The Physics Factbook. Glenn Elert, Midwood High School, Brooklyn College.All About the Peregrine Falcon. U.S. Fish and Wildlife Service. December 20, 2007. (archived)The Ballistician (March 2001). Bullets in the Sky. W. Square Enterprises, 9826 Sagedale, Houston, Texas 77089.

Municipal Recycling Is Not Mandatory in All U.S. Cities

Municipal Recycling Is Not Mandatory in All U.S. Cities Mandatory recycling is a hard sell in the United States, where the economy runs largely along free market lines and landfilling waste remains inexpensive and efficient. When the research firm Franklin Associates examined the issue a decade ago, it found that the value of the materials recovered from curbside recycling was far less than the extra costs of collection, transportation, sorting and processing incurred by municipalities. Recycling Often Costs More Than Sending Waste to Landfills Plain and simple, recycling still costs more than landfilling in most locales. This fact, coupled with the revelation that the so-called â€Å"landfill crisis† of the mid-1990s may have been overblown- most of our landfills still have a considerable capacity and do not pose health hazards to surrounding communities- means that recycling has not caught on the way some environmentalists were hoping it would. Education, Logistics and Marketing Strategies Can Lower Recycling Costs However, many cities have found ways to recycle economically. They have cut costs by scaling back the frequency of curbside pickups and automating sorting and processing. They’ve also found larger, more lucrative markets for the recyclables, such as developing countries eager to reuse our cast-off items. Increased efforts by green groups to educate the public about the benefits of recycling have also helped. Today, dozens of U.S. cities are diverting upwards of 30 percent of their solid waste streams to recycling. Recycling Is Mandatory in Some U.S. Cities While recycling remains an option for most Americans, a few cities, such as Pittsburgh, San Diego, and Seattle, have made recycling mandatory. Seattle passed its mandatory recycling law in 2006 as a way to counter declining recycling rates there. Recyclables are now prohibited from both residential and business garbage. Businesses must sort for recycling all paper, cardboard and yard waste. Households must recycle all basic recyclables, such as paper, cardboard, aluminum, glass, and plastic. Mandatory Recycling Customers Fined or Denied Service for Non-Compliance Businesses with garbage containers â€Å"contaminated† with more than 10 recyclables are issued warnings and eventually fines if they don’t comply. Household garbage cans with recyclables in them are simply not collected until the recyclables are removed to the recycling bin. Meanwhile, a handful of other cities, including Gainesville, Florida and Honolulu, Hawaii, require businesses to recycle, but not yet residences. New York City: A Case Study for Recycling In perhaps the most famous case of a city putting recycling to the economic test, New York, a national leader on recycling, decided to stop its least cost-effective recycling programs (plastic and glass) in 2002. But rising landfill costs ate up the $39 million savings expected. As a result, the city reinstated plastic and glass recycling and committed to a 20-year contract with the country’s largest private recycling firm, Hugo Neu Corporation, which built a state-of-the art facility along South Brooklyn’s waterfront. There, automation has streamlined the sorting process, and its easy access to rail and barges has cut both the environmental and transportation costs previously incurred by using trucks. The new deal and new facility have made recycling much more efficient for the city and its residents, proving once and for all that responsibly run recycling programs can actually save money, landfill space, and the environment. EarthTalk is a regular feature of E/The Environmental Magazine. Selected EarthTalk columns are reprinted on About Environmental Issues by permission of the editors of E.

The job industry Essay Example | Topics and Well Written Essays - 500 words

The job industry - Essay Example I see myself as a business executive.   In order to fulfill this long term goal, I must not only be aware of current technology, but current trends.   The economy is of great concern to me.   Many business executives failed today’s society with their bad decisions.   I do not want to be a future business executive that fails society with bad decisions.   In order to become the best I can be, I must be taught how to be a great, not good, but great business executive.   I believe that the decision to attend Cornell University School of Industrial and Labor Relations is a step in the right direction.   This is the best choice I could make, because Cornell University School of Industrial and Labor Relations is the best place to learn how to be a great business executive.  Another interest of mine is being a part of something productive.   Loans, the stock market, and other business are not as important to me as business that creates an actual product.   This pr oduct could range from a technology or something practical like energy.   Being a useful part of society and creating a product that is needed encompasses what I want to achieve.   Without attending the Cornell University School of Industrial and Labor Relations, I would not be able to achieve this dream.If I continue the path I am on without attending the Cornell University School of Industrial and Labor Relations, I will not be able to become a business executive.   I will be stuck in a dead end job that pays minimum wage with no benefits.