Preparation of Isopentyl Acetate Free Essays

Results and Discussion Isopentyl propanoate was prepared by refluxing isopentyl alcohol in excess propanoic acid and concentrated sulfuric acid. The ester was obtained by distillation in 62% yield, bp 140-150oC (lit. 156 oC [1]). We will write a custom essay sample on Preparation of Isopentyl Acetate or any similar topic only for you Order Now GC analysis of the distillate revealed only traces of the starting alcohol (Figure 1). The ester’s structure was confirmed using IR and 1H NMR spectroscopy. The IR spectrum (Figure 2) shows a strong absorption at 1741 cm-1 consistent with an ester C=O stretching vibration. The NMR spectrum (Figures 3 and 4) contains all of the signals expected for this compound. A triplet at 1. 18 ppm and a quartet at 2. 8 ppm are assigned to the propionyl methyl and methylene groups, respectively. A doublet at 0. 82 ppm is assigned to the two isopentyl methyl groups. A 6 line pattern at 1. 66 ppm is assigned to the methine group (9 lines are expected), and a triplet at 4. 08 and a quartet at 1. 48 ppm are assigned to the OCH2 and CHCH2 methylene groups, respectively. Experimental Preparation of isopentyl propanoate. Isopentyl alcohol (4. 6 mL, 42 mmol), propanoic acid (40 mL, 530 mmol), and concentrated sulfuric acid (1 mL, 18 mmol) were refluxed for 66 minutes. The solution was diluted with water (60 mL) and extracted with ether (60 mL). The ether layer was washed with saturated aq. NaHCO3 (2 x 60 mL), dried with MgSO4, and distilled at atmospheric pressure to give isopentyl propanoate: 3. 8 g (62% from isopentyl alcohol), bp 140-150 oC (lit. 156 oC [1]); IR (ATR) cm-1: 2960 (vs, CH), 1741 (vs, C=O), 1189 (s, C-O); 1H NMR (C6D6, 400 MHz) ? : 0. 92 (d, 6H, J = 6. 8 Hz, CH(CH3)2), 1. 18 (t, 3H, J = 6. 6 Hz, CH2CH3), 1. 48 (q, 2H, J = 6. 6 Hz, CHCH2), 1. 66 (9 lines, 1H, J = 6. 8 Hz, CH), 2. 28 (q, 2H, J = 6. 6 Hz, CH2CO), 4. 08 (t, 2H, J = 6. 8 Hz, OCH2); GC (120 oC, right-hand column): isopentyl propanoate (4. 8 min), isopentyl alcohol (4. 4 min). References 1. Mordechai, U. ed. â€Å"Esther’s Ester Handbook, 11th Ed. â€Å", Fruity Publishing, Boca Raton, 1984. E-factor Insert list and mass of consumed materials, product, and e-yield here. Figures [GC data, IR spectrum, and NMR spectrum; label each one as a numbered figure (see above) and give the figure an appropriate title; see appendix for additional instructions] NMR Exercise Choose one of the molecules listed below. Draw its structure (show all H) and label all protons as A, B, C, †¦ (apply the same label to ‘NMR equivalent’ protons). Examine the online proton NMR spectrum (follow the link; the small upper spectrum is the carbon-13 NMR, ignore it). List all shifts associated with the compound; do not list shifts for solvent, TMS, etc. , and do not list integrals or coupling patterns. Assign each signal to a particular proton. Do this on your own; do not work with others. (If you are having trouble with the assignment and would like some help from others, work on a different spectrum from the one that you turn in). Turn in 1) the compound name provided below, 2) the structural formula and H labels, 3) the list of shifts and assignments (write the label next to its shift). Do not turn in the spectrum How to cite Preparation of Isopentyl Acetate, Papers

Sustainability Policy

Question: Explain about the sustainability policy in Australia. Answer: Organization working with: Veolia in Australia and New Zealand is the only environment solutions of the region which consist of the environment solutions organization. It has specific capabilities regarding waste water and water treatment, services of waste and recovers services, management of energy, maintaining services of industrial cleaning. The ethical responsibility of the organization is to create value regarding the management principal and conduct of the business. As being a part of the sound risk and hazardous management, there are certain principals regarding the conduct of the business. The main objective of the company is to understand and support the customer achievements. All managers, employees, contractors and visitors are made responsible for being aware and complying of this policy. Research conducted on Sustainable policy: Business and industrial organizations in Veolia have various new approaches to develop and contribute the society and the environment in regards to future. Veolia has recognized their economic goals which can be complemented by social as well as environmental targets. These areas deal with sustainable flourishment and cultural life which is inter dependent. Sustainable policies cover the environmental and the dimension based on the social development of sustainability (Bocken et al., 2014). Basically sustainable development of Veolia covers four broad areas of function which includes: The uses of price which encourages the individual as well as the agents to take the full cost regarding the degradation of the environment in the decision. To develop economic growth, there is the implementation of economic growth. To make the contribution strengthen the international trade and investment towards the development of sustainability worldwide The methods and techniques of policy writing: Sustainability has its importance especially in the public sector and also in the government sector with various kinds of environmental targets. It can be stated that the suppliers in the public sector must be following the suit of sustainable policy which is very often stipulated when they wish to make a contract (Boons et al., 2013). There are certain benefits of well written sustainable policies which include: To meet the current environment-related legislation. To save money regarding waste and recycling. The efficient increase in the supply chain. To differentiate from the competition. To improve reputation within the stakeholders. Needs and Interest of Stakeholders Stakeholders are regarded as a key component in the field of sustainable development because of the following reasons: Stakeholders must be engaged as soon as possible rather than later than to develop a more effective strategy and materials. If the issues are understood properly, then there will be a better application for the organization as well as the proper approaches. Sustainability has become very important for all scales of companies as the stake holders approaches are very essential. Internal education, as well as external engagement in the companies, is prioritizing as internal key holders (Coomer, 2013). Sustainable policy opinion and its advantages and disadvantages: Sustainable policies are regarded as the policies of meeting human development goals. Senior management is regarded responsible for the formulation of sustainable development policy and also for the establishment of specific objectives. It also consists of certain social elements as well as alleviation regarding poverty as well as equity distributions. Management should always incorporate the expectation of the shareholder regarding the brand policy statement (Matos Silvestre, 2013). There are various advantages and disadvantages of for organizations and various stakeholder groups: Advantages include: Renewable energy well renewable; Environmental benefits; Reliable energy sources; Economical benefits; Stabilize energy prices; Disadvantages include: Reliability of supply; Difficult to generate in large quantity; Large capital cost; Requirement of large tracts of land; Final recommendations for policy: The tips which help for policy option based on effectiveness, time frames and cost includes: To keep it simple- There should be one page to clear and succinct with necessary information to stakeholders. To keep it real- Strategies and objectives should measurable and achievable. Link it as much as possible existing to mission. Align with other policies- In order to avoid overlapping there should be standard quality management. Dont reinvent the wheel- Policies available on internet, use as these are template to create an application on own business (Matos Silvestre, 2013). Reference list: Bocken, N. M. P., Short, S. W., Rana, P., Evans, S. (2014). A literature and practice review to develop sustainable business model archetypes.Journal of Cleaner Production,65, 42-56. Boons, F., Montalvo, C., Quist, J., Wagner, M. (2013). Sustainable innovation, business models and economic performance: an overview.Journal of Cleaner Production,45, 1-8. Coomer, J. C. (Ed.). (2013).Quest for a Sustainable Society: Pergamon Policy Studies on Business and Economics. Elsevier. Matos, S., Silvestre, B. S. (2013). Managing stakeholder relations when developing sustainable business models: the case of the Brazilian energy sector.Journal of Cleaner Production,45, 61-73.

WordPress Pingbacks and Trackbacks Explained + Why to Disable Them

If you’re a perceptive user, you may have noticed a setting in your dashboard relating to WordPress pingbacks and trackbacks. However, there’s a good chance you have no idea what these techniques are, or why they’re controversial.In a nutshell, pingbacks and trackbacks are technologies that notify other websites when content has been published that their users might find interesting. While this sounds pretty good in theory, there are also a number of downsides to using both strategies, which is why we recommend that you disable them.In this article, we’re going to start out by explaining what WordPress pingbacks and trackbacks are and discussing their pros and cons. Then, well show you how you can disable both on your own website. Let’s take a look! What are trackbacks?A trackback is a notification that WordPress sends to an external site when you link to it in your content. Let’s say that you’ve just published a new blog post on dog t raining tips, which includes a link to another website that contains some solid advice for your readers.In this scenario, you could send a trackback ‘ping’ to that site, in order to get the owner’s attention. That person could then choose to approve the trackback. This would display an excerpt of your post and a link to your site in their comments section.What are pingbacks?Pingbacks in WordPress have a very similar goal, but they work a little differently. In fact, they were actually created to be a better version of trackbacks, in order to resolve some of the problems with the technique (which we’ll look at shortly).The key thing to understand is that while trackbacks are sent manually, pingbacks are automatic. To illustrate this, we’ll go back to our earlier example. Let’s say you have pingbacks set up on your blog, and you just published that article about dog training tips (linking to the same external website as before).In this case, a pingback would immediately be sent to the site you linked to – as long as it also has pingbacks enabled. That site would then automatically check to verify that the pingback originated from your post (and wasn’t some type of spam), before displaying it as a simple link in the comments section. In most cases, pingbacks won’t include an excerpt from the post in question, though this depends on the theme that a site is using.From your perspective, the trackback and the pingback work in a very similar way. The most vital differences are ‘under the hood’ – the communication technologies used are different. However, it isn’t necessary to understand all the technical details in order to get a sense for the advantages and drawbacks of using these techniques.An example of what pingbacks/trackbacks look likeThe pros and cons of using WordPress pingbacks and trackbacks on your siteIn order to understand why we recommend that you disable pingbacks and trackbacks, lets discuss the pros and cons.Pros 👠It’s easy to see why so many people have used both pingbacks and trackbacks in the past. The potential benefits of these technologies include:Increasing backlinks to your own site, driving traffic your way and improving your Search Engine Optimization (SEO).Making connections with related sites, and encouraging them to share your content by showing your willingness to promote theirs.Offering more value to your readers, by introducing them to other content they may find useful.Cons 👎The biggest issue with trackbacks is that they soon became used to send huge amounts of spam. As trackbacks can be sent manually to any site, spammers use them to get their links posted on as much content as possible.Keeping these spam trackbacks off your site requires manually checking each one since there’s no other way to verify that they aren’t fake. Naturally, the time spent moderating these trackbacks could be better used elsewhere. It also makes them a lot less valuable than they could be in a theoretical sense.As we mentioned earlier, pingbacks were designed mainly to resolve this spam problem. That’s why they work automatically, and require verification before they can be posted. In addition, they won’t even be sent unless both blogs have enabled pingbacks.However, pingbacks soon fell victim to the same downsides as trackbacks. Many spammers were able to easily overcome the protections put into place. That resulted in a lot of fake and malicious pingbacks. Again, this means that sites with this feature enabled generally have to spend a lot of time moderating the resulting comments.In addition, you can end up with something called ‘self-pings’. If you link to another post or page on your own site, the pingback feature will send a notification (as though you were linking to an external source). This isn’t very useful and can quickly become an annoyance, although you can eliminate this problem with a free plugin like No Self Pings.Most sites should disable WordPress pingbacks and trackbacks (heres how to do it)There’s been a lot of controversy over the years as to whether using pingbacks and trackbacks is worth the downsides. These days, however, its widely recommended that you avoid both techniques.At the end of the day, using WordPress pingbacks and trackbacks tends to result in a lot of spam and wasted time. Even if they can provide a few benefits, there are better ways to drive traffic to your site.In addition, very few people actually use these technologies in a legitimate way at this point. This means that, more so than in the past, you’re likely to get a lot more fake pingbacks and trackbacks than legitimate ones.Fortunately, disabling both on your own site is a simple matter. In your WordPress dashboard, you can navigate to Settings Discussion:Here, you’ll want to deselect the first two options:Attempt to notify any blogs linked to from the articleAllow link notifications from other blogs (pingbacks and trackbacks) on new articlesThis will prevent your site from creating and receiving pingbacks and trackbacks. As a result, you should have an easier time keeping your comments section under control. Plus, youll free up time that can be devoted to more effective audience-building strategies.Skip the pingbacks and trackbacks!Pingbacks and trackbacks do have benefits in theory, but there are plenty of reasons why they’re rarely used these days. Ultimately, the downsides of both outweigh the potential for a slight boost to traffic and visibility.Keeping WordPress pingbacks and trackbacks active on your site is likely to result in a lot of spam coming from people who just want to get a link of any sort posted on your content. The good news is that you can quickly disable both options in your WordPress Settings screen.Have you ever used pingbacks and trackbacks on a WordPress site , and what was the result? Share your experiences with us in the comments section below! #WordPress pingbacks and trackbacks explained, plus why you really should just disable them

Campus Safety essays

Campus Safety essays Do you know how to remain safe on campus? There has been a rise in campus crime over the years due the increased dorm population, according to Maj. Susan Norred, assistant director of safety and security for the University Police Department. Norred, a police officer for approximately 17 years, has primary concern for students that walk or jog alone at night. She has served in her current position for two years. Whenever a person is out alone at night, they are providing an opportunity for an assault or a robbery, she said. A person increases their vulnerability by wearing a headset while they are walking or jogging, she said. To prevent themselves from being a target for criminals, both female and male students should use the buddy system. They also should let someone know where they are going and when they can be expected to return. Another serious safety issue that has been brought to Norreds attention deals with campus parking. Students will often be spotted returning to their cars after class and they will be offered a ride to their car so that the other person can have their parking space. This practice is a very, very dangerous practice for students to participate in and a person should never, under any circumstance, accept a ride from a stranger, she said. You never know who you are getting in the car with, Norred said. Meeting new people and trusting them very quickly is another personal safety issue that Norred addressed. Learn to build up trust before you actually entrust your life with them, she said. She advises meeting new people in a group setting, preferably with a good friend. Have your own transportation so that you do not have to rely on that person to take you back home, she said. Theft is also a personal safety issue at UF. Bicycles are the most commonly stolen item and they account for 40 percent of all thefts, Norred said. ...

Immigration Law Essay Example | Topics and Well Written Essays - 2000 words

Immigration Law - Essay Example (thomson 5) The first type is that of the skilled workers who come to UK under the official work permit scheme. These migrants make up about a third of the business and information services sector and a quarter of the healthcare sector. The second category of immigrants is composed of the relatives of British citizens coming to join them. These are frequently not economic migrants and do not contribute to the country with work. The third category is made of asylum seekers. Lastly, the fourth type is made up of illegal immigrants. The British Government has formulated policies that welcome the first type into its fold. But its policies regarding the other three are getting more and more stringent. As we will find out later in this paper that non-EEA immigrants who are not skilled are increasingly finding themselves excluded from the job market in the UK. (a) Non- EEA workers usually work under the work permit scheme. This scheme was formalized in 1980. In this scheme, the employer has to apply on behalf of a particular employee for a specific job. He has to show that there are no other resident workers available for the same job and with the requisite skills and experience. Work permits are then granted for work up to five years, and workers are then eligible to apply for 'indefinite leave to remain.' The employer has to support the application for it to be granted. (b) Under the Seasonal Agricultural Workers Scheme farmers and growers and students in full time education can take up work for a period of not exceeding three months. The government has increased the quota of workers under this scheme recently. (c) Another scheme is the Working Holidaymaker Scheme, which provides the young Commonwaealth citizens to holiday for 2 years in the UK and work alongside full-time for 50% of the time or work part-time for more than 50% of their stay. This provides a good avenue for work for migrants from non-EEA countries. (d) There is also a Highly Skilled Migrant Programme, under which highly talented and accomplished individuals are taken in as workers in UK. In this scheme, the application comes directly from the individuals, not the employers. They are assessed on a point system which covers qualifications, experience, to some extent age, etc. (e) Under the Innovators Scheme those individuals are allowed entry into the UK who have business ideas which will bring economic benefit to the UK but they are not qualified under any other scheme. (f) The last group of workers is Asylum seekers and refugees. The asylum seekers are normally not allowed to work while their applications are under consideration. However, if a decision has not come after six months, they can apply for permission to work. After they are granted refugee status, they can freely work and do not need to be granted permission from the Home Office to do so. 2. Policies governing Immigrants and Asylum seekers 2.1 The British Government has passed, over many years, several acts governing the issues related with immigrants and asylum seekers. These are: Immigration Act 1971, Immigration Act 1988, Asylum and Immigration Appeals Act 1993, Asylum and Immig

How the deficits of the 1980's contributed to the prosperity of the Term Paper

How the deficits of the 1980's contributed to the prosperity of the 1990's - Term Paper Example These are: (1) to reduce the growth of government spending, (2) to reduce the marginal tax rates on income from both labor and capital, (3) to reduce regulation, and (4) to reduce inflation by controlling the growth of the money supply† (Niskanen, â€Å"Encyclopedia†). These changes reduced taxes for most wage earners, and most of the poor were actually exempted from taxes. Reagan also eliminated price controls on oil and natural gas, long distance telephone service, and ocean shipping. As reported by the Joint Economic Committee in April of 2000, Reagan’s polices resulted in the largest peacetime economic boom in American history. It also resulted to 35 million jobs for many Americans. The committee reports, â€Å"[i]n 1981, newly elected President Ronald Reagan refocused fiscal policy on the long run†¦these were fundamental changes that proved the foundation for the Great Expansion that began in December 1982† (Sperry, â€Å"Issues†). At the b eginning of the 1990s when Reagan’s tax rate cuts were set in place, tax payers who earned more were taxed more, and those who earned less were taxed less. This gave a chance for those in the lower rungs of the economic ladder to recover from their difficult economic situation. The reductions in income tax for those who had lower income were so dramatic because President Reagan doubled the personal exemption; he also increased the standard deduction, and he tripled the earned income tax credit. Earned income tax credit gave net cash to single-parent families with children at the lowest income levels. Reagan’s economic policies practically took from the rich and took less from the poor, and this gave the lower income group in American society a chance to recover and improve their lives. The eventual manifestations of improved life were later seen in the 1990s. The stimulants for growth in the 1990s can be traced back to the economic measures and policies which were implemented during the

Case Study 4 Example | Topics and Well Written Essays - 250 words

4 - Case Study Example isorder – Observation of thin, tired-looking, fatigued, weight loss, poor appetite, muscle weakness, skin warm, dry, flat affect, provides little detail in answers, indecisive, has difficulty concentrating depressed mood or anhedonia (absence or pleasure) for at least 2 weeks. (Pg 53) sleep disturbance, weight loss, loss of appetite, loss of sexual interest (Pg 59-60), Patients with depression may display poor or lapsed hygiene. Pg 61 May cause a patient to be withdrawn (Pg 61), negative, slow, low-self-esteem Hypothesis 1: Major depressive disorder – genetics plays a vital role, results from abnormalities between brain hormones and neurotransmitters i.e. hypothalamus-pituitary-adrenal (HPA) axis; serotonergic, dopaminergic and noradrenergic systems. Depression might be caused by relational issues. Bereavement is among the most traumatizing, painful and gut wrenching experience a person will ever face. Grieving people often undergo various states during this period (regret, loneliness, withdrawal, intrusive images, depression, unhappiness, a feeling of being overwhelmed and depersonalization. These characteristics displayed by the patient made the diagnosis from settling on anemia, thyroiditis and insomnia. At first, the feelings of grief may seem to be forgotten. But, with time they evolve into bursts of depression which are brought about by the reminders of the dead/deceased (Astrid,