Biology in Everyday Life

This Perspective from Penney Gilbert and colleagues from the USA and Sweden focuses on adult stem cells found in skeletal muscle, also known as satellite cells. They address the problem that, once extracted from muscle and placed into culture, satellite cells quickly lose their ability to self-renew, complicating studies into their biology. The development of new bioengineering approaches, such as hydrogel microwell arrays, could solve this problem. These approaches can accurately monitor the behavior of satellite cells and provide robust data sets, thanks to the number of different tests that can be carried out in parallel. To illustrate the usefulness of such tools, the authors show how stem cell division and self-renewal can be tracked in clonal assays using time-lapse microscopy. By increasing the stiffness of the hydrogel microwells in the assays, satellite cells can be maintained in culture for up to one week and successfully engraft back into mouse muscle. Stem cells hold the potential to become part of powerful medical treatments and therapies, but only if we understand how we are changing them by removing them from their niche. This Perspective pushes this issue to the fore and offers some suggestions as to how we can further improve stem cell culture http://the-scientist. com/2012/04/01/are-cancer-stem-cells-ready-for-prime-time/ Biology in Everyday Life This Perspective from Penney Gilbert and colleagues from the USA and Sweden focuses on adult stem cells found in skeletal muscle, also known as satellite cells. They address the problem that, once extracted from muscle and placed into culture, satellite cells quickly lose their ability to self-renew, complicating studies into their biology. The development of new bioengineering approaches, such as hydrogel microwell arrays, could solve this problem. These approaches can accurately monitor the behavior of satellite cells and provide robust data sets, thanks to the number of different tests that can be carried out in parallel. To illustrate the usefulness of such tools, the authors show how stem cell division and self-renewal can be tracked in clonal assays using time-lapse microscopy. By increasing the stiffness of the hydrogel microwells in the assays, satellite cells can be maintained in culture for up to one week and successfully engraft back into mouse muscle. Stem cells hold the potential to become part of powerful medical treatments and therapies, but only if we understand how we are changing them by removing them from their niche. This Perspective pushes this issue to the fore and offers some suggestions as to how we can further improve stem cell culture http://the-scientist. com/2012/04/01/are-cancer-stem-cells-ready-for-prime-time/

The Sverdlovsk Antrax Epidemic Research Paper Example | Topics and Well Written Essays - 1250 words

The Sverdlovsk Antrax Epidemic - Research Paper Example The CIA, which had satellite photographs of the military base of Sverdlovsk suggested that there was a laboratory facility in the military base. Soviet emigrants and dissidents had also heard about the death of people in the city’s southern part and ascribed these deaths to hazardous clouds emanating from the military base. The US therefore strongly believed that an explosion at Sverdlovsk’s main military base had spread lethal anthrax spores over the city, leading to the death of hundreds of people (Guillemin, 2002). The Soviets however rebutted any action regarding biological weapons and at various international conferences, they tried proving their tainted meat story. They also refused to refusal to permit researchers get into Sverdlovsk for investigations. As a restricted military area, Sverdlovsk was off-limits to foreigners (Pbs.org, 1995 and Wampler & Blanton, 2001). Western inspectors to this day have not been permitted to visit this military facility (Pbs.org, 1995). Approximately five thousand people got exposure to the aerosol. Roughly, three thousand workers were present in the ceramics factory on April 2, and eighteen of them passed away. This event’s attack rate has been estimated at two percent. Of the victims, two-thirds were men, with the median age being forty-five. Though they were definitely exposed, no children or young people were affected – the youngest victim being a 24-year-old kindergarten teacher who was suffering from tuberculosis (Guillemin, 2002).

EM200-1501B-02 Introduction to Website Development Phase 1 IP Assignment

EM200-1501B-02 Introduction to Website Development Phase 1 IP - Assignment Example The main page is usually the first page to be seen when one visits a web page. The main page has enriched information regarding the website. Main pages contain graphic images describing the function of the site. A main page also contains links to other pages within the site. The primary function of a main page is to give access to other pages on the website. This is achieved by providing links to articles, pages and other files contained in the website. Main pages also contain a search box to help visitors quickly access data and information they are looking for on a website. A websites primary page also explains the core functions of the internet site to its visitors (Gareth, 2003). A header in a general computer context is the top portion of an electronic file. In a web page context, a header can be said to be a ‘banner’. It can be defined as the top portion that contains the name, logo and general information about a website. A header is consistent throughout the website appearing at the top of all pages it contains. The headers primary function is to communicate with visitors on what the website is for and what it does. To accomplish this, a header usually contains the company’s logo and in most cases its slogan or motto. A good header attracts visitors’ attention, sparks their curiosity, and prompts them to look for more in the website. Since it is the first object to be seen on a website, a header creates a focus point for a visitor and encourages him/her to continue browsing the site. Depending on its image and color, a header can also improve the visibility of the website (Gareth, 2003). In a general computer context, footer is the bottom portion of an electronic or computer file. For a web page, footer describes the part at the bottom of the page. Like the header, a footer is also consistent throughout the website appearing at the bottom of every page. Most web page footers contain a

The case for diversifying across residential properties in London Coursework

The case for diversifying across residential properties in London - Coursework Example Average return as the percentage of the total returns is computed as (103.58/1243*100) = 8.33%. To calculate the percentage deviation from mean, you subtract the average return from the monthly returns for example in 2000, the total returns was $1404, the average return was $117. The month of january generated $100. To calculate the deviation, we subtract $117 from $100 to get a negative deviatio of $17 (-17). The percentage deviation is therefore calculated as (-17/1404*100) = -1.210826211% to 2 decimal places I get -1.21%. Note that: average return is only used to calculate the deviation in terms of returns but to calculate the % deviation, we devide the deviation return by the total returns then multiply by 100. Alternatively, we can calculate the average return as the percentage of total return as (117/1404*100) = 8.33% and take for example month of january, calculate its percentage of the total return as (100/1404*100) = 7.12% therefore, the % deviation is calculated as (7.21% - 8.33%) = -1.21% this is computed for the rest of the months to get the percentage deviations. Expected risk SD is = 0.5*0.35%+ 0.5*0.12 = 0.235%. This is the expected loss from the investment of choice. Therefore, whether an investor invests in Holland or south ken, the loss will be 0.235% of the total returns From the above data, that we have the same returns 8.33% but different risk level. Portfolios with more risk than others markets so invest in less risky investments (Baum & Hartzell, 2011). For instance, an investor can invest in south ken and Fulham. From the analysis, Chelsea residential market has the highest returns (profits) averagely $120 per month closely followed by ken/Holland with average return of $117 per month, then south ken with $104 per month then lastly Fulham with $103.58. on the other hand, Chelsea registered the highest possibility of a loss which is 0.51% of the total returns. Ken/Holland

Colonial America to Road to Revolution Essay Example | Topics and Well Written Essays - 250 words - 1

Colonial America to Road to Revolution - Essay Example The slave trade was not an output of any raids by Europeans bur Africans themselves were sellers of other Africans and Europeans were purchasers. Slavery was not something new for Europe as Christians and Moslems enslaved each other in wars. However, the slaves were considered the members of society and slavery was not shifted to their children. With the passage of time, Europeans were in need of labor due to which, they moved towards Africa for black gold, a term that they used of African slaves. Africans were transported to European colonies for the labor needs. Black slaves were considered the strength of English men. Black slaves increased in number in white populations and the white population started considering that the Africans are naturally slaves. Soon, the slaves gained the status of chattels that had no rights of their own. Due to mass enslavement, the white man became more and more prejudiced racially. I like the essay as a detailed history is given about the slavery and the practices of Europeans towards African slaves. The writer has given the detailed account of the arrival of black people in a white people’s country in a persuasive

Financial Planning and the Unsystematic Risk Statistics Assignment

Financial Planning and the Unsystematic Risk Statistics - Assignment Example Therefore, during winter, people will prefer buying winter tyres and when summer sets in, the demand for dry weather tyres will be high. i. The best asset for Gemma to choose is Rolls-Royce since it has the highest monthly real return coefficients. This implies that they will guarantee a high interest as opposed to those with low return percentage. The objective of making an analysis of a company’s fundamentals is to find the intrinsic value of the stock as opposed to the value with which the stock trades at in the market. Therefore, in carrying out an analysis, if the intrinsic value happens to be more than the current share price, then it shows that the stock is worth much value than its price and it makes sense in buying a stock. However, if this is not the case, then using the stock-analysis strategy like in the case of Gemma is not useful. In addition, the stock-pricing strategy offers a lot of information in an intangible and unmeasurable manner. It is easy to find some aspects of the company that are quantifiable. Such aspects include profits and they are quite easy to find. However, it is quite difficult to measure the qualitative factors such as the competitive advantages of a company, company staff and the reputation of the company. Therefore, the aspects make the picking stocks a subjective and intuitive process thus not suitable in such a case. In addition, the human element evident in the forces moving the stock market, the stocks cannot do whatever one anticipates that they will do since there is a likelihood of having a change in emotions quite unpredictably. Therefore, when confidence turns into some fear, the stock market can be a bit risky and dangerous. Therefore, this also contributes to the decision by Gemma not to use the stock-pricing strategy. i. In order to protect their portfolio of shares, Mark Brisley and Evie Petrikkou used the call and put options. The put option allowed them to sell assets at a given agreed on price while the call shows the right to buy shares at an agreed price.  

US Airways Group - Putting It All Together Essay

US Airways Group - Putting It All Together - Essay Example In a market characterized by low-fares, high volumes, traditionally basic services such as in-flight meals and movie were included in the fare price but in today’s fierce operating environment airlines have resulted to charging extra for these services in an effort to offer the lowest selling price possible for the passengers. U.S. Airways is suffering from an image problem, where it is collectively viewed as one of the least admired corporations in its industry sector. In the Fortune 1,000: Most Admired Companies 2006, U.S. Airways received the lowest score out of ten of the major airlines in the U.S. Even in the 2011 Fortune survey with added competition from other major airlines out of the twelve companies surveyed only AMR received a lower score than U.S. Airways. Furthermore it has not improved in any of the attributes surveyed in the study (Cnn, 2011). It is clear that U.S. Airways needs to address its quality of service in order to increase its market share in the domestic market as well as successfully entering into the global airline market. The airline industry in general is very susceptible to external economic, legal and political factors which can deeply affect its day to day operations. The recessionary economic conditions in the domestic economy as well as internationally significantly affec ted the airline industry particularly in the years 2008-2009 where most major airlines reported operational losses. Price gouging and intense competition have been a defining characteristic of the industry ever since the deregulation of 1978. After the 2010 travel season with slight improvement in the domestic and global economy the airline industry has been able to bounce back maintaining full occupancy rates for its flights and has once again reached profitability (Yahoo, 2011). One of the biggest costs for any airline is the cost of fuel, so in general the industry is particularly vulnerable to fuel price increases (Datamonitor, 2011). Regardless, rising costs and the volatility of fuel prices has cut the average margin of the airline industry to only 2%.U.S. Airways as a whole needs to improve the customer satisfaction rate by improving their customer service, improving the quality of its services, and decreasing the percentage of delayed flights. They also need to improve the s peed of the boarding process in order to improve customer satisfaction. These are some of the things that U.S. Airways management needs to address in order to improve their market share and increase revenues. The airline industry has always been characterized for being a highly regulated industry with various federal agencies overseeing their operations from a safety and security standpoint. The Federal Aviation Administration (FAA) is responsible for regulating and ensuring the overall safety of all civilian as well as commercial flights in the domestic airspace. All airlines operating in the domestically are subject to the rules and regulations of the FAA. The FAA has the authority to issue any directives or changes in procedures, including aircraft maintenance. For U.S. Airways the adequate planning and budgeting of enough cash reserves, manpower, airplane inventory and financial resources to meet with the changing operational demands of running a domestic and global airline must be factored in the strategic and contingency planning of the company. There is a high degree of complexity in the operation, maintenance and repair of commercial aircrafts. As a consequence there is a high level of added costs