Foam Definition in Chemistry

Foam Definition in Chemistry A foam is a substance made by trapping air or gas bubbles inside a solid or liquid. Typically, the volume of gas is much larger than that of the liquid or solid, with thin films separating gas pockets. Another definition of foam is a bubbly liquid, particularly if the bubbles, or froth, are undesirable. Foam can impede the flow of a liquid and block gas exchange with air. Anti-foaming agents may be added to a liquid to help prevent bubbles from forming. The term foam may also refer to other phenomena that resemble foams, such as foam rubber and quantum foam. How Foam Forms Three requirements must be met in order for foam to form. Mechanical work is needed to increase the surface area. This can occur by agitation, dispersing a large volume of gas into a liquid, or injecting a gas into a liquid. The second requirement is that surfactants or surface active components must be present to decrease surface tension. Finally, the foam must form more quickly than it breaks down. Foams may be open-cell or closed-cell in nature. Pores connect the gas regions in open-cell foams, while closed-cell foams have enclosed cells. The cells are usually disordered in their arrangement, with varying bubble sizes. The cells present minimal surface area, forming honeycomb shapes or tessellations. Foams are stabilized by the Marangoni effect and by van der Waals forces. The Marangoni effect is a mass transfer along the interface between fluids due to surface tension gradient. In foams, the effect acts to restore lamellae (a network of interconnected films). Van der Waals forces form electric double layers when dipolar surfactants are present. Foams are destabilized as gas bubbles rise through them. Also, gravity pulls liquid downward in a liquid-gas foam. Osmotic pressure drains lamellae because of concentration differences throughout the structure. Laplace pressure and disjoining pressure also act to destabilize foams. Examples of Foam Examples of foams formed by gases in liquids include whipped cream, fire retardant foam, and soap bubbles. Rising bread dough may be considered a semisolid foam. Solid foams include dry wood, polystyrene foam, memory foam, and mat foam (as for camping and yoga mats). Its also possible to make a foam using metal. Foam Uses Bubbles and bath foam are fun uses of foam, but it has many practical uses, too. Fire retardant foam is used to extinguish fires.Solid foams may be used to engineer strong yet light materials.Solid foams are excellent thermal insulators.Solid foams are used to make flotation devices.Because solid foams are light and compressible, they make an excellent stuffing and packing material.A closed-cell foam called a syntactic foam consists of hollow particles in a matrix. This type of foam is used to make shape memory resins. Syntactic foams are also used in space and deep-sea exploration.Self-skin or integral skin foam consists of a dense skin with a lower density core. This type of foam is used to make shoe soles, mattresses, and baby seats.

America at the Turn of the Century

As America gets closer to the 21st century, we face many challenges as a nation. America has a very strong country. There is something that can maintain the status of the country. A powerful economy is the foundation of the world economy, the United States has very advanced technology, and today dominates the world. These three things are so strong that we will not be so disappointed. At the turn of the century America is one of the best original places. Due to the rapid growth of technology and industry, the government and most citizens are not ready to deal with that effect. The combination of philosophy like Laissez Fair and social Darwinism has created the United States with little concern for oppressed people. Ultimate citizens, ordinary people like you and me condemn these conditions and changes in demand. The necessity of change and progress is called a progressive era Perhaps at the turn of the century, one of the most romantic images of America is Wild West. One of the most famous images of the wild west is the advocate of the cowboy, the American border. The American cowboy has become an architectural image of merchants and literature, and in recent years it is an image of the reconstruction of contemporary historians. Merchants and literature showed a very beautiful view of American cowboys, which encouraged bovine farming and the development of new railroads and offered imagination to Americans. In order to clarify the inaccuracies of these myths of the cowboy, modern historians emphasized the more dull and difficult aspects of the cowboy's life. Both sides borrowed the evidence of the fact, but both speech has mythical evidence. In his book on American Jewish immigration at the turn of the century, the time described by our father 's world Owen Ho does not sound obsolete. Howe said migrant workers remembered adolescence in Russia: How can I explain it ... When we talked about Dostoyevski, did we share excitement? In America, only young people You c an choose movies, music, art and dance, only God knows.

The body shop relationship marketing Essay Example | Topics and Well Written Essays - 3000 words

The body shop relationship marketing - Essay Example The network of relationships whether with the supplier, customer, distributor, employees, partners or with the regulators is the playground for practicing relationship marketing techniques. The traditional marketing that has helped businesses to grow for decades can now be rendered as outdated with its narrow scope and inflexible approach. However, despite of these huge changes in the market dynamics, the fundamentals of marketing still remain the same. In recent times a lot many companies and organizations have tried adhering to the best practices of relationship marketing, but at the same time there have been examples where they have lost their grounds in this blind run. To ensure the better understanding of the subject matter, it becomes essential to discuss the same in the context of a company that has been practicing relationship marketing aggressively. Body shop in its more than 30 years old history (The Body Shop n.d) has launched many initiatives that focus on building relationships with all the stakeholders throughout the business network. This essay will attempt to address all the benefits of relationship marketing and simultaneously the flaws related with it will be discussed The body shop that was launched in UK in the year 1976 deals in beauty products which are made of naturally occurring ingredients and focusing on the philosophy of ‘Green Business’. Its network comprises of more than 2500 stores around the world through which The Body Shop operates in a global environment. Apart from that these stores located in almost 61 countries, the Body Shop also has strong online presence as well. There are various initiatives launched by the organization which help the organization to develop as a socially aware and responsible brand. This initiatives communicate strongly about the ethics of the organization that it not only cares for the people who are directly associated with it, but is also

Jewish History Essay Example | Topics and Well Written Essays - 1500 words

Jewish History - Essay Example These immigrations are similar in their ways of adapting in new countries, but they had differences in reasons of immigration and challenges and experiences in their new countries. Enduring Understanding These two Jewish populations differed in challenges and experiences in their new countries, with the Jews in Babylon faring better than the Ethiopian Jews in Israel, even when they both experienced comparatively equal human rights in their new countries. In Babylon, Jews hated being separated from their homeland, but they flourished as merchants and professionals (Hooker). They enjoyed many of the liberties provided to local Babylonians, such as owning land, freedom to practice Judaism, and acquiring wealth (Hooker). They prospered significantly due to the extensive trade routes that existed in this region (Moss). In Israel, the Ethiopian Jews generally experienced intense poverty, due to poor Hebrew/English language skills and lack of employability skills (â€Å"Ethiopia's Jews: Th e Last Exodus†). These Jews came from agricultural communities and were forced to rapidly assimilate into a cosmopolitan lifestyle and economic structure (Chen). Ethiopian Jews also suffered from discrimination, because some Jews questioned their â€Å"Jewishness† (â€Å"Ethiopia's Jews: The Last Exodus†). ... The situation became more depressing throughout the early 1980's. The state demanded forced conscription at the age of 12, which separated many Jewish boys away from their parents (â€Å"The History of Ethiopian Jews†). Furthermore, Ethiopian Jews feared the threats of war, famine, and unbearable health conditions (â€Å"The History of Ethiopian Jews†). The pull factors of their migration came from Israel and the U.S., which wanted to save them and bring them to Israel. In 1977, Prime Minister Menachem Begin wanted the Ethiopian Jews to immigrate to Israel (â€Å"Ethnic Groups: Ethiopian Jews†). For the Jews who were deported to Babylon, they faced pull factors. The Chaldeans, as they pursued similar Mesopotamian practice, deported the Jews after they subdued Jerusalem in 597 BC. Hence, they suffered exile that led to their Diaspora. Despite feelings of discrimination, both the Ethiopian Jews and Jews in Babylonian exile persevered through learning their new coun try’s language and adapting to their culture. The Ethiopian Jews learned Hebrew and English and adapted practices and skills that enabled them to live and work in the city (Chen). Their children studied in Israelite schools and some successfully finished school and became prominent political and social leaders (Chen). In Babylon, the Jews adopted the Chaldean religion. In both cases, the Ethiopian and Babylonian Jews contributed to the socio-economic and cultural diversity of their new countries, although some feared that Ethiopian Jews never truly fit into Israel’s way of life, because their poverty (Chen). Comparison of the Immigration of Ethiopian Jews to Israel and

Combating Terrorism :: essays research papers fc

At 8:45am, on September 11th, 2001 America’s heart was torn by a hijacked plane crashing through the north tower of the World Trade Center. Eighteen minutes later, a shocked country received a second blow as a second plane tore through the south tower. An estimated 2,819 lives were lost that day. The attack seemed to have come out of nowhere. As a country, we were not properly prepared to defend ourselves. America needs to devote as much money and as many resources as possible to combating terrorism.   Ã‚  Ã‚  Ã‚  Ã‚  It has been argued that if we focus too much on preventing terrorism, we risk ignoring or reducing support for measures designed to reduce other threats to life and health (Source 1). The suggested threats we risk ignoring included heart disease, automobile accidents, and drunk driving. While these are completely valid daily threats, they are also often easily preventable. While there is not much an individual can do to protect themselves from terrorism, they can definitely have a strong influence on preventing the aforementioned. Many of societies concerns can be prevented by the self control of the individual. With the exception of heredity, heart disease may be prevented by eating healthy and exercising. Car accidents can be prevented by being more aware, and focusing on driving instead of text messaging on cell phones at every red light. The American individual needs to be more responsible so that the government can focus on bigger things such as terrorism.   Ã‚  Ã‚  Ã‚  Ã‚  If America had given homeland security as much attention five years ago as it does today, the twin towers may still be standing. The events on September 11th, 2001 should have never happened to a country with as much resource and technology as America. It is difficult to understand why a country that has enough technology to create human body parts from stem cells would not have the technology to prevent a terrorist from boarding and taking over a U.S. airplane.   Ã‚  Ã‚  Ã‚  Ã‚  We made the mistake of not worrying about terrorism enough in the past. Now America needs to learn from that mistake and look towards the future. Many people think that we are spending too much on counter terrorism. Since September 11th, America has spent 18 billion dollars combating terrorism (Source 2). That may sound like a lot, but not when we had a total of $1,946 trillion dollars of expenditures in 2003 alone Combating Terrorism :: essays research papers fc At 8:45am, on September 11th, 2001 America’s heart was torn by a hijacked plane crashing through the north tower of the World Trade Center. Eighteen minutes later, a shocked country received a second blow as a second plane tore through the south tower. An estimated 2,819 lives were lost that day. The attack seemed to have come out of nowhere. As a country, we were not properly prepared to defend ourselves. America needs to devote as much money and as many resources as possible to combating terrorism.   Ã‚  Ã‚  Ã‚  Ã‚  It has been argued that if we focus too much on preventing terrorism, we risk ignoring or reducing support for measures designed to reduce other threats to life and health (Source 1). The suggested threats we risk ignoring included heart disease, automobile accidents, and drunk driving. While these are completely valid daily threats, they are also often easily preventable. While there is not much an individual can do to protect themselves from terrorism, they can definitely have a strong influence on preventing the aforementioned. Many of societies concerns can be prevented by the self control of the individual. With the exception of heredity, heart disease may be prevented by eating healthy and exercising. Car accidents can be prevented by being more aware, and focusing on driving instead of text messaging on cell phones at every red light. The American individual needs to be more responsible so that the government can focus on bigger things such as terrorism.   Ã‚  Ã‚  Ã‚  Ã‚  If America had given homeland security as much attention five years ago as it does today, the twin towers may still be standing. The events on September 11th, 2001 should have never happened to a country with as much resource and technology as America. It is difficult to understand why a country that has enough technology to create human body parts from stem cells would not have the technology to prevent a terrorist from boarding and taking over a U.S. airplane.   Ã‚  Ã‚  Ã‚  Ã‚  We made the mistake of not worrying about terrorism enough in the past. Now America needs to learn from that mistake and look towards the future. Many people think that we are spending too much on counter terrorism. Since September 11th, America has spent 18 billion dollars combating terrorism (Source 2). That may sound like a lot, but not when we had a total of $1,946 trillion dollars of expenditures in 2003 alone

Internet Marketing in Business Essay

An effective ‘Marketing Mix’ including all 7 is a way of identifying a businesses achievements of marketing objectives, meeting customer needs, is balanced and consistent, creates a competitive advantage and matches corporate resources. The 7p’s include: product, price, place, promotion, people, process and physical evidence Product: This is first considered in the marketing mix as it all depends on it. This can be a physical product or a service that the corporation is offering to the public. The only way to have a good marketing strategy is by making sure that the ‘product’ is up to standard, promoting every quality part of that good or service. Bikroy promotes their products very effectively as they use picture to enhance the quality of the product itself. They also provide a range of products and service including clothes, accessories, shoes/sandals etc and it provided for men and women. They include brand and designer wear which shows that they have high quality in their product. Bikroy also sells a range of products matching famous celebrity’s outfits that customers would want to buy. Bikroy, online or in their online newspaper provides customers the latest fashion info and what not to wear giving them an advantage to promote their products. Price: This is the total amount a customer pays for the product. It is decided through a number of factors a product have to offer including material costs, product identity, competition, market share and the customer’s perceived value of the product. If other store/business have the same product on stock other businesses may decrease or increase their price for customer satisfaction. Their price for the products vary depending on the product – quality, brand etc. For the designer items it can be expensive, although Bikroy may provide same looking product without the brand name making it affordable. Place: Place represents the location where a product can be purchased. It is often known as the distribution channel. The place can be situated as a physical store or as virtuals stores on the internet. Bikroy.com is rapidly becoming the market leader in the Bangladesh online. All the products are sold ONLINE and not located anywhere else where people can purchase Bikroy items. They does have a warehouse where all stocks are kept and together has a office located in Dhaka. Promotion: Is a way of communication that a business/organisation may use in the market place. It enables the marketer to a advertise the product or service being provided by them. Advertisement is a powerful tool that corporations uses to enhance their products/service to encourage buyers/customers. Promotion has four distinct elements made up of advertising, public relations, word of mouth and point of sale. As their business is purely based upon the internet everything is promoted through the World Wide Web on the website and off. They have promotion on other websites and also Bikroy has developed an application to allow customers to track particular products on its sites through their web browser, whatever websites they are looking at. Bikroy organisation communicates information about their product and service to potential customers by identifying customer details and sends them information through mail, post etc aiming to sell the products. Another advertising method Bikroy use s on their website is that they have added a page of feedback from customers which enables ‘public relation’ which is one of the promotion powerful element. People: It is appropriate to have people in the marketing of services as all people who directly or indirectly influence the perceied value of the product or service, inlcuding knowledge workers, employees, management of the business and also the consumers. People deliver services – they could be any mentioned. People promote and sell products and services. Are their employees, customers – their family and friends, and any other people associated with Bikroy.com. Employees are important to this strategy of marketing mix as in can be those who deliver the products to customers. So they have to polite, helpful and have the knowledge of the business for them to answer any questions provided by the customer. It can also be the employees that answer the phone when any customer calls for any queries. Bikroy.com also have employees updating their website and replying to emails and online comments on their feedback page. Bikroy employees has the knowledge, training and other as pect helping the business with marketing for their business. Bikroy customers are also people that help in them marketing of services as they spread the business information. Process: This is the procedures of activities which lead to an exchange of value. The process should include how customers are handled from first and last point of contact. Bikroy is determined to be number one in the online market. They have thought through their process and kept it clear and have made it customer satisfactory. Bikroy’s strategy consists of aims that has a well-defined process. Bikroy have control of their website, their information/images etc are presented without any doubt intelligibly promotional. Payments are all done through their website online as they are only an online business. Also they have a step-by-step information on how to use and buy off their website, they also have page on delivery information. Here they can track down on where shopping is, know how much is cost to deliver, know when to expect the delievery etc. Physical Evidence: It is the tangible form of the service – this can include how a customer is treated by a staff member, a train ticket, the length of time a customer has to wait for service or their product (depending on the business). A physical evidence is aproof for customer to measure whether he or she has recieved value. As Bikroy.com is an online company their customer has difficulty not knowing how for example a dress will feel, look on them. Bikroy therefore provides annual reports, articles, etc showing them that Bikroy products are worth the value. Bikroy helps customers with their products by giving them full information about the product.

The Utilization Of Operations Management Capacities Essay

This paper strategy to assess the utilization of operations management capacities, evaluate in what way economic benefit accomplished, and to investigate the use of service and management of operations at Nissan Motor Company to create significance and maintenance. Nissan is one of the main three Asian automotive manufacturers. Furthermore, the investigated to identify assessment of the Program Evaluation and Review Technique (PERT) and Critical Path Method (CPM) of the company’s project management the routes in which they can merge. Nissan Motor Company produces a forecasting system, utilize it on the manufacturing line, and implement it on the best-selling merchandise. Besides, encompassing proposed to recognize risk- deduction tactics, due to supply chain risk, that may show how Nissan can alleviate rendering to disturbances brought about by natural catastrophes, which Nissan recovered from a tsunami and earthquake that hit Japan on March 11, 2011, and destroyed abundant of Nissan factories. Operations management aids to growth profitability and productivity and develops procedures and productivity, which will create value customers. To list a few functions of operation management consist of planning, organizing, staffing, leading and controlling (Heizer, 2014). Nissan’s chief operation management production is the automobile. To support Nissan’s operations and its business strategy these decisions are to support operations management. Nissan operated these purposes ofShow MoreRelatedCapacity Planning And Capacity Limitations1233 Words   |  5 PagesMilad Banijamali A00949646 OPMT 1198 Assignment #2 Capacity planning and capacity limitations Managing capacity is a central feature of strategic operations management in some ways managing and understanding capacity is associated with process choice, because understanding both areas can then enable CFG to make informed decisions about what it can and cannot do in the market. Adding capacity allows CFG to position plants and service outlets in key areas around the world. In some cases locationRead MoreGate Turnaround at Southwest Airlines1129 Words   |  5 PagesAirlines Date: February 27, 2013 Business Brief Capacity planning is a necessary function of an organization to ensure that the highest rate of output is reached through the current processes taking place within an organization. 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