Most Common Plastics

Most Common Plastics Below are five of the most common plastics used for different applications along with their properties, uses and trade names. Polyethylene Terephthalate (PET) Polyethylene Terephthalate- PET or PETE- is a durable thermoplastic that shows tough resistance to chemicals, high energy radiation, moisture, weather, wear, and abrasion. This clear or pigmented plastic is available with trade names such as: Ertalyte TX, Sustadur PET, TECADUR PET, Rynite, Unitep PET, Impet, Nuplas, Zellamid ZL 1400, Ensitep, Petlon, and Centrolyte. PET is a general purpose plastic that is made by polycondensation of PTA with ethylene glycol (EG). PET is commonly used for making soft drink and water bottles, salad trays, salad dressing containers, peanut butter containers, medicine jars, biscuit trays, rope, bean bags, and combs. High-Density Polyethylene (HDPE) High-Density Polyethylene (HDPE) is a semi flexible to hard plastic that can be easily processed by catalytic polymerization of ethylene in slurry, solution, or gas phase reactors. It is resistant to chemicals, moisture, and any sort of impact but cannot stand temperatures exceeding 160 degrees C. HDPE is naturally in the opaque state but can be colored to any requirement. HDPE products can be safely used for storing food and drinks and so it is used for shopping bags, freezer bags, milk bottles, ice cream containers, and juice bottles. It is also used for shampoo and conditioner bottles, soap bottles, detergents, bleaches, and agricultural pipes. HDPE is available under trade names of HiTec, Playboard, King Colorboard, Paxon, Densetec, King PlastiBal, Polystone, and Plexar.   Polyvinyl Chloride (PVC) Polyvinyl Chloride (PVC) is present in both rigid and flexible forms as unplasticised Polyvinyl Chloride PVC-U and Plasticised Polyvinyl Chloride PCV-P. PVC can be obtained from ethylene and salt by vinyl chloride polymerization. PVC is resistant to fires because of its high chlorine content and is also resistant to oils and chemicals except aromatic hydrocarbons, ketones and cyclic ethers. PVC is durable and can withstand aggressive environmental factors. PVC-U is used for plumbing pipes and fittings, wall cladding, roof sheeting, cosmetic containers, bottles, window frames, and door frames. PVC-P is commonly used for cable sheathing, blood bags, blood tubing, watch straps, garden hoses, and shoe soles. PVC is commonly available under trade names of Apex, Geon, Vekaplan, Vinika, Vistel, and Vythene. Polypropylene (PP) Polypropylene (PP) is a strong yet flexible plastic that can withstand high temperatures up to 200 degrees C. PP is manufactured from propylene gas in presence of a catalyst such as titanium chloride. Being a lightweight material, PP has high tensile strength and is highly resistant to corrosion, chemicals, and moisture. Polypropylene is used to make dip bottles and ice cream tubs, margarine tubs, potato chip bags, straws, microwave meal trays, kettles, garden furniture, lunch boxes, prescription bottles, and blue packing tape. It is available under trade names such as Valtec, Valmax, Vebel, Verplen, Vylene, Oleplate and Pro-Fax. Low Density Polyethylene (LDPE) Low Density Polyethylene (LDPE) is soft and flexible as compared to HDPE. Low Density Polyethylene shows good chemical resistance and excellent electrical properties. At low temperatures, it shows high impact strength. LDPE is compatible with most foods and household chemicals and acts as a poor oxygen barrier. Because it has very high elongation as a result of its molecular structure, LDPE is used in stretch wraps. This translucent plastic is mainly used for plastic food wrap, garbage bags, sandwich bags, squeeze bottles, black irrigation tubes, garbage bins, and plastic grocery bags. Low density polyethylene is made from the polymerization of ethylene in an autoclave or tubular reactors at very high pressures. LDPE is available in the market under the following trade names: Venelene, Vickylen, Dowlex, and Flexomer.

Declining Confidence in Government Essay Example | Topics and Well Written Essays - 1250 words

Declining Confidence in Government - Essay Example This essay looks into some of the texts that have focused on the issue. Balz, D. (October 13, 2013). Public confidence in GOP, government declining fast. The Washington Post. Retrieved from http://bangordailynews.com/2013/10/13/politics/public confidence-in-gop-government-declining-fast/ The Washington Post is a popular form of media that addresses most of the contentious issues facing the US and other parts of the world. The article highlights the recent events involving the US government that have resulted into a decline in public trust. The article discusses the surprising results from the Gallop Polls and the NBC News-Wall Street journal following the historic government shutdown (Balz, 2013). People knew that the threats of a regime default and the shutdown would lead to a disruption of the stability of political parties in Washington. It was even more surprising to find out that so much damage could be achieved in a short time. The article also states that the mistakes of the Republican Party also contributed to the shutdown. The article is viewed as showing some of the most alarming trends in the modern times. It was clear that the citizens have lost faith in the government and its ability to steer the country towards the right direction economically. It is clear that most citizens are pessimistic and are counting on the situation to get worse (Balz, 2013). The present standoff that has resulted into a considerable decline in public trust in the government is similar to the one experienced in the discussion about the increase in the debt ceiling. It has been observed that the decline in confidence in the government has fallen to levels that have never been experienced before. Democrats did not escape the criticism as well. This is owing to the fact that they were also blamed for the shutdown. The article states that the opinion polls from various organizations revealed similar trends in

Marriot Being a Marketer Case Study Example | Topics and Well Written Essays - 1250 words

Marriot Being a Marketer - Case Study Example The marketer offers excellent positioning and segmentation to the multinational business entity. The marketer utilizes several marketing strategies for his target market and offers the ideal segmentation for all the business undertakings around the globe. The marketer gives more concentration on the consumer than any other element to make the business a success. He utilizes market researches too obtain feedback that is usually utilized in the provision of the best services within the multinational business. Key marketing Issues Market research-Marriott utilizes market research to deal with certain marketing issues or create competitive advantages towards its competitors. The multinational utilizes different methods to collect information for market evaluations. Forecasting methods- Marriott utilizes dissimilar forecasting techniques for different brands offered within its business empire. Markets- Marriott is a business-to-consumer market since it comprises of consumers and purchaser s of products without the intention of gaining any profits from the provided services. Market targeting-Marriott utilizes three strategies in market targeting for its products. The three strategies are concentrated, differentiated and undifferentiated target strategies. Market positioning-Marriott has successfully positioned its products in the thoughts of its consumers by providing products that effectively address their desires. Positioning has also assisted Marriott in marketing segmentation in several ways. Market segmentation-Marriott segments its market accordingly to suit all consumers visiting its hotels all over the globe. Segmentation has extensively done to group consumers according to their needs and preferences. Personal Case Analysis Marriot case introduces the basic and most imperative concepts in the market strategies. The case presents the difficulties that a marketer undergoes to keep the business running. Market targeting, segmentation, and positioning offer the m arketer with the best strategies to run the business. Marriott obtains a huge market share by operating on dissimilar countries around the globe. Case Questions 1. How is Marriott segmenting the market for hotel services? Marketing segmentation offers different or distinct groups of consumers with homogenous needs and characteristics (Shoba 1). Marriott has effectively segmented the market into Marriott and Renaissance consumers who bear dissimilar preferences. Renaissance customers presented the urge to open the windows up and look outside upon arrival in their presented rooms. The customers who spent their time within the Marriott’s property showed interest in undertaking various high-tech activities such as video conferencing. Marriott has responded to this call through the institution of equipment such as the most recent recording and communication gadgets within the meeting places. The property has also created an affiliation with AT&T as well as Cisco to provide virtual meeting facilities. Marriott has also presented another segment within its brands that consist of customers and commerce travelers conscious about the environment. Marriott has responded to this segment through the development of model green hotels. The hotel brands bearing these green hotels are designed to hold communal spaces, and visitor’s room that are more oriented towards preserving water, and energy than the earlier versions. Marriott brand with the green hotels aims at operating in ecosystem friendly environs. The hotels in this segment offer pads manufactured from recycled paper and key cards developed out of recycled plastics. The achievers serve as another of the many segments that Marriott has developed.

Technical proposal assignment Example | Topics and Well Written Essays - 1000 words

Technical proposal - Assignment Example In this regard, my institution is not able to accurately and timely analyze students’ data to inform future planning, strategy and service provision. As Campbell (2007) states, students’ intake and new admissions continue to increase while new programs continue to be adopted day by day by the college. The ever increasing records are difficult to handle just by a filing system, hence there is need to develop an effective, accurate and efficient way of managing students record. The students’ record management system that is automated is the right technical change for the college. Students’ record management system is a computerized students’ record management platform that allows students, institution, teachers and administrators to interact. Students’ records help in enhancing students and institution relationship, providing services, facilities and support to the students, measuring and controlling students academic achievement at the institution and subsequently and support to the alumni. The automation of the students’ record system is expected to improve on accuracy and effectiveness of information capturing retrieval and generation of reports for each student. This would eliminate the loss of data improve services in the administration since accessing information would be within a short time. The proposed students’ record management system refers to the computerized network distribution system that allows for the management of records involving the students in college or a learning institution. This technology will enhance a number of functions within the administration concerning the students’ records including registration of students in their respective programs, manage their fee data bases, manage their examination records and manage their accommodation booking and allocation as shown in figure 1. This is a software program application that is intended to provide timely information about all the

The Ozone Layer Essay Example for Free

The Ozone Layer Essay The Ozone layer is a stratum of gas found in the upper atmosphere which guards the human beings and other living organisms from harmful ultraviolet rays from the sun. This layer is made up of ozone gas which is triatomic molecule, comprising of three oxygen molecules (O3) (Ebi McGregor, 2008). It is an irritating, colorless and corrosive gas. It is also a very strong oxidizing agent and therefore at the lower atmosphere, it exhibits some harmful effects on the respiratory systems of animals and corrodes sensitive parts of plants. Ozone cannot be stored for long periods or transported like other industrial gases. This is because it decays quickly to the prevalent diatomic oxygen (O2) and therefore it can only be produced on site (Hov O Hov, 1997). The atmosphere is stratified with the troposphere as the lowest layer. Stratosphere is the layer that is most immediate from troposphere ranging from six to thirty miles above the surface of the earth (Hov O Hov, 1997). The variations in the layers occur due to temperature and pressure changes in the atmosphere. Much of the air (90%) is held in the lowest 10% of the atmosphere due to the compressibility property of gases. Much of the Ozone is found in the stratosphere although it can also be found in small traces in the lower atmosphere. It is very beneficial at the upper atmosphere since it absorbs nearly 97 percent of the ultraviolet radiation from the sun. However, there exist a number of environmental problems from the gas at both layers of the atmosphere. Ozone is the only chemical compound in the troposphere where the variation between the actual atmospheric levels and poisonous levels is so minor (Ebi McGregor, 2008). There is gradual increase in Tropospheric ozone especially in the northern hemisphere where emissions of human origin have been on the rise. At ground level, ozone is destructive to human health, materials and plants. It affects the respiratory membranes and other lung tissues of organisms, thereby inhibiting their respiratory function. When individuals are exposed to high concentration of ozone, they develop complications associated with their respiratory system such as pneumonia, asthma, chronic obstructive pulmonary disease and other respiratory illnesses. In most cases, these illnesses if not well manned can lead to premature deaths(Ebi McGregor, 2008). This problem is caused by human activities, majorly in the transport and petrochemical industries. Although the gas is not produced directly from car engines and industrial processes, combustion of the gasoline based engines results to emission of unstable organic compounds into the atmosphere. Several reactions between these compounds and sunlight follow, resulting to formation of ozone at the source of the pollution (Hov O Hov, 1997). Since the process of ozone formation is dependant on sunlight, it is in higher concentrations within the tropics and during summer in the Polar Regions. Moreover, it can be incidentally formed from the diatomic oxygen when electrical discharges occur. Large electric motors that use brushes, laser printers and photocopiers can also produce ozone due to the repeated sparking inside them (Ebi McGregor, 2008). The chemical composition of ozone contributes to its harmfulness to living organisms. It is thermodynamically an unstable molecule and can undergo ozone photolysis in the presence of UV light leading to production of the hydroxyl radical (OH). The radical is important in removal of hydrocarbons from the air but on the other hand, the products end up forming smog (Hov O Hov, 1997). Due to its strong oxidation capabilities, ozone attacks all polymers that contain double bonds within their chain structure. For example natural rubber is vulnerable to attack, causing cracks to develop on the its surface which deepens with time. The rate of growth of the crack depends on the ozone concentration in the atmosphere. Ground level ozone is a major component of smog which has remained to be the most difficult problem in America. It causes negative impacts on human health, such as irritation of the respiratory track, coughing and even decreased lung function in the long run (Hov O Hov, 1997). In addition, it causes invisibility during flights, something that can turn out very catastrophic. It is also worth to mention that, smog affects even vegetation by causing discoloration, damage and loss of leaves which can hinder photosynthesis from taking place (Ebi McGregor, 2008). Furthermore, the molecular orbitals in ozone have strange and continually changing resonating forms. This occurs because of the three atomic nuclei which try to share the uneven compliment of electrons. Due to this, ozone is easily split by a halogen radical, a property that led many industrialized nations to withdraw from production of certain halocarbons. Similarly, it is unsafe to use some halocarbons as refrigerants and aerosols (Ebi McGregor, 2008). On the contrary, stratospheric ozone is considered to be beneficial due to its ability to filter harmful ultraviolet rays from the sun. However, there are alarming dangers on the eventual fate of the living organisms on the earth due to the recent depletion of this layer. Since the intensity of the radiation from the sun is constant, reduction in ozone levels will translate to less protection (Titus, 1986). Exposure to ultraviolet rays causes skin cancer in human beings. In case of plants, the rays affect their physiological and developmental processes. Its effects extend to marine ecosystems whereby, the radiation causes damage to the early stages of development in fish, and other marine organisms (Titus, 1986). Solution to this problem can only be realized by tackling the factors causing it, which are mainly of human origin. Using alternative sources of energy instead of petroleum products, results to dual benefits (Hov O Hov, 1997). First of all, it is a step towards minimizing formation of the ground-level ozone that is caused by burning of petroleum based fuels. In addition, it will result to reduction in emission of harmful gases that damage the stratospheric ozone. References: Ebi, L. K. , McGregor, G. ( 2008, Nov). Climate Change, Tropospheric Ozone and Particulate Matter, and Health Impacts. Retrieved May 21, 2010, from: http://ehp03. niehs. nih. gov/article/fetchArticle. action? articleURI=info:doi/10. 1289/ehp. 11463#Ozone Hov, 0. , O Hov. (1997). Tropospheric ozone research: tropospheric ozone in the regional and sub-regional context. Michigan: Springer. Titus, G. J. (1986). Stratospheric ozone. Regensburg: Environmental Protection Agency.

Juiced: Wild Times, Rampant Roids, Smash Hits, and How Baseball Got Big

Juiced: Wild Times, Rampant Roids, Smash Hits, and How Baseball Got Big To fully understand this book, people must go behind the book and find the true state of mind of the author. Unfortunately in this case, the author is the one and only Jose Canseco. Jose Canseco is what I like to call, â€Å"The black sheep in the family of baseball.† Canseco’s history can be related to such incidents of drug using, heavy drinking, numerous sexual encounters with hundreds of partners, and unreasonable acts of violence. This book goes into grave detail on how steroids have changed his life and how it is currently changing baseball. Juiced starts off with what appears to be a legal disclaimer. "This book does not intend to condone or encourage the use of any particular drugs, medicine or illegal substances." Yet the author spends most of the time doing nothing but repeating his assertions that taken under proper supervision, these drugs can enhance everyday life. Jose Canseco says he wrote Juiced because he wanted his fans to listen to him and hear him out on what he has to say about the current state of baseball and it’s future. I believe this former 40-40 had another reason for writing this book and it’s plain and simple†¦money. Money encourages the human mind to perform selfish and somewhat outlandish stunts in order to achieve wealth. I believe that Jose Canseco’s mind consists of slop and greed. It’s a proven fact that this 1988 Major League MVP has a truly unstable mind. One incident in his book that proves this is the time he went â€Å"deep sea fishing.† The story begins with Jose Canseco’s wife leaving him for Kansas City Chiefs’ all-star tight end, Tony Gonzalez. Mr. Canseco reacted by grabbing his 12-gauge shotgun and taking his boat out to sea where he decided to shoot sharks with his shotgun when they surfaced. This incident is one of the very many incidents that question the complete truth in Juiced. Jose Canseco is best known for several things: A fly ball bouncing off his noggin and landing over the fence, dating Madonna, his tape measure home runs, having numerous run-ins with the law, being the first man to ever hit 40 home runs and steal 40 bases in the same season, and his bulging biceps. In Juiced, Canseco recalls other steroid user’s stories within the sport ... ...baseball and hold them responsible. Unfortunately, there are also a lot of bad things rising from the depths of this book. One of these would be the fact that Jose Canseco is gaining more attention for these appalling allegations and stories. Not only is Canseco gaining attention from the media but he’s also profiting immensely from his book, book signings, talk shows, and television appearances. The only thing worse than a regular Jose Canseco is a rich Jose Canseco. We are simply feeding the dragon himself by agreeing and believing all his allegations in Juiced. The book clearly depicts that there are holes within his stories and these prevent the truth to be fully told. Although I have an undying hatred for Jose Canseco, he deserves credit for forcing America to give serious attention to the steroid problem not only in baseball but all of professional sports. Without Jose Canseco’s deceiving stories about the abuse and the media attention that this is creating, there is a possibility that this could have been unnoticed for many years to come. This drug usage throughout the league is clearly paving a dark future for our national pastime.

Gvt Task 2

Running Head: GVT Task 2 GVT Task 2 Maureen O’Connor Western Governors University The mouth, pharynx, esophagus, stomach, small intestine consisting of the duodenum, jejunum, ileum, and large intestine consisting of the transverse colon, descending colon, ascending colon, cecum, sigmoid colon, rectum, vermiform appendix and anus are all part of the alimentary canal. The function of the alimentary canal is to provide nourishment. The teeth, tongue, gallbladder, salivary glands, liver and pancreas are considered to be accessory digestive organs.These organs produce saliva (salivary glands), bile (gallbladder and liver) and digestive enzymes which contribute to the breakdown process of food. Mechanical digestion begins with the process of taking food into the mouth or ingestion and chewing it until it can be moved through the alimentary canal during the propulsion process. This process includes swallowing and in a series of muscle contractions and relaxation it is then moved from one organ to another.Swallowing is performed in the pharynx while peristalsis occurs in the esophagus, stomach, small and large intestine. Breakdown of the food in the stomach, also called churning and in the small intestine are also part of the mechanical digestion process. When food leaves the stomach the process of chemical digestion begins. This is when carbohydrates, proteins, and lipids are broken down into simple sugars, amino acids, fatty acids and glycerol, otherwise known as chemical building blocks.Enzymes are chiefly responsible for carrying out chemical digestion and are secreted in the central cavity of the alimentary canal. Digestive enzymes include salivary and pancreatic amylase, present in the mouth and small intestine, maltase and lactase which are also present in the small intestine and are involved with carbohydrate digestion. Pepsin which is present in the stomach and chymotrypsin present in the small intestine both involved with protein digestion. Aminopeptid ase breaks down amino acids during protein digestion.Finally pancreatic lipase is involved with fat digestion. Summary of Two Experiments An experiment performed in the Department of Food Sciences and Nutritional Health at Kyoto Prefectual University involved polylysine which had been used as a food additive in Japan for many years. The researchers were interested in how polylysine inhibited pancreatic lipase. They performed the experiment on rats and then measured the effect of the polylysine after the rats were fed a meal.These measurements were taken after the rats had been administered fat emulsion with the polylysine and fat emulsion without polylysine. The results suggested that polylysine had the ability to inihibit pancreatic lipase in the small intestine and suppressed dietary fat absorption. A second experiment involved alpha-amylase inhibition from the white kidney bean and its effect on weight loss and blood glucose levels. Clinical studies in which subjects were given t he white bean product and their after meal glucose levels were studied.A group of subjects with diabetes were also given the white bean product and there was found to be a decrease in their after meal glucose levels. There were more clinical studies in which subjects were given varying doses of the white bean product along with amino acids with varying levels of dietary intake. The conclusion was that alpha-amylase inhibitor does have an effect on the absorption rate of carbohydrates and be a factor in weight management as well as type 2 diabetes mellitus control. Independent ExperimentQuestion|Independent Variable|Dependent Variable|Controlled Variable| What is the effect of digestive enzymes on peanut butter? |Kind of digestive enzyme added to peanut butter. |Change in consistency or texture of peanut butter after 1 hour. |Equal amount of peanut butter in each cup. | If I add pepsin and hydrochloric acid to peanut butter, this should cause a change in the consistency of the peanut butter after 1 hour. If I add lipase and hydrochloric acid to peanut butter this should cause a change in the consistency of the peanut butter after 1 hour.The lining of the stomach secretes gastric juices including hydrochloric acid which dissolves food, pepsin which is a protein-splitting enzyme and lipase, a fat-dissolving enzyme. By adding the Biuret solution to identify the presence of protein to each cup containing peanut butter, enzymes and hydrochloric acid there should be a change in color to pink or purple. Data Table 1 Cup #|Contents| 1|Peanut Butter| 2|Peanut Butter & Pepsin| 3|Peanut Butter + Pepsin + HCl| 4|Peanut Butter + Lipase| 5|Peanut Butter + Lipase+ HCl|Results Data Table Cup #|Contents|Observations| 1|Peanut Butter|| 2|Peanut Butter & Pepsin|| 3|Peanut Butter + Pepsin + HCl|| 4|Peanut Butter + Lipase|| 5|Peanut Butter + Lipase+ HCl|| Summary of Results and Conclusion Pepsin and hydrochloric acid are present in the stomach glands and responsible for breaking do wn protein to the building block stage to become amino acids. The absorption of protein then occurs and amino acids enter capillary blood via villi and subsequently transported via the hepatic portal vein to the liver.Although lipase is present in the stomach it is not very effective because the stomach is a strongly acid environment. The majority of fat digestion happens in the small intestine although it needs bile from the liver to break it down into glycerol and fatty acids. Once that occurs the fatty acids enter the lacteals of the villi for transportation via lymphatic transportation to the thoracic duct. Glycerol and fatty acids (small-chain) are transported via the hepatic portal vein to the liver.