10 Interesting Sulfur Facts

10 Interesting Sulfur Facts Sulfur is element number 16 on the periodic table, with element symbol S and an atomic weight of 32.066. This common nonmetal occurs in food, many household products, and even your own body. Here are 10 interesting facts about sulfur. Sulfur is an essential element for life. Its found in amino acids (cysteine and methionine) and proteins. Sulfur compounds are why onions make you cry, why asparagus gives urine a weird odor, why garlic has a distinctive aroma, and why rotten eggs smell so horrible.Although many sulfur compounds have a strong smell, the pure element is actually odorless. Sulfur compounds also affect your sense of smell. For example, hydrogen sulfide (H2S, the culprit behind the rotten egg odor) actually deadens the sense of smell, so the odor is very strong at first and then vanishes. This is unfortunate, because hydrogen sulfide is a toxic and potentially deadly gas! Elemental sulfur is considered non-toxic.Mankind has known about sulfur since ancient times. The element, also known as brimstone, primarily comes from volcanoes. While most chemical elements only occur in compounds, sulfur is one of relatively few elements that occurs in pure form.At room temperature and pressure, sulfur is a yellow so lid. Its usually seen as a powder, but it forms crystals, too. One interesting feature of the crystals is that they spontaneously change shape according to temperature. All you need to do to observe the transition is melt sulfur, allow it to cool until it crystallizes, and observe the crystal shape over time. Were you surprised you could crystallize sulfur simply by cooling the melted powder? This is a common method of growing metal crystals. While sulfur is a nonmetal, like metals, it wont readily dissolve in water or other solvents (although it will dissolve in carbon disulfide). If you tried the crystal project, another surprise might have been the color of sulfur liquid when you heated the powder. Liquid sulfur can appear blood-red. Volcanoes that spew molten sulfur display another interesting feature of the element. It burns with a blue flame from the sulfur dioxide that is produced. Volcanoes with sulfur appear to run with blue lava.How you spell the name of element number 16 likely depends where and when you grew up. The International Union of Pure and Applied Chemistry (IUPAC) adopted the sulfur spelling in 1990, as did the Royal Society of Chemistry in 1992. Up to this point, the spelling was sulphur in Britain and in countries using the Roman languages. The original spelling was actually the Latin word sulfur, which was Hellenized to sulphur. Sulfur has many uses. Its a component of gunpowder and believed to have been used in the ancient flamethrower weapon called Greek Fire. Its a key component of sulfuric acid, which is used in labs and to make other chemicals. Its found in the antibiotic penicillin and is used for fumigation against diseases and pests. Sulfur is a component of fertilizers and also pharmaceuticals.Sulfur is created as part of the alpha process in massive stars. It is the 10th most abundant element in the universe. Its found in meteorites and on Earth mainly near volcanoes and hot springs. The abundance of the element is higher in the core than in the Earths crust. Its estimated there is enough sulfur on Earth to make two bodies the size of the Moon. Common minerals that contain sulfur include pyrite or fools gold (iron sulfide), cinnabar (mercury sulfide), galena (lead sulfide), and gypsum (calcium sulfate).Some organisms are able to use sulfur compounds as an energy source. An example are cave bacteria , which produce special stalactites called snottites that drip sulfuric acid. The acid is sufficiently concentrated that it can burn skin and eat holes through clothes if you stand beneath the minerals. Natural dissolution of minerals by the acid carves out new caves. Although people always knew about sulfur, it wasnt recognized as an element (except by alchemists, who also considered fire and earth elements). It was 1777 when Antoine Lavoisier provided convincing evidence the substance was indeed its own unique element, worthy of a place on the periodic table. The element has oxidation states ranging from -2 to 6, allowing it to form compounds with all of the other elements except the noble gases.

A Personal Quest to Become a Dentist in the United States

A Personal Quest to Become a Dentist in the United States Since I started primary school, I have always had a deep passion for biology and art. I started making sculptures out of clay when I was in the secondary school, I accompanied my cousin to a dental office once at that time and I can vividly remember paying full attention to the dentists hands: all that instruments and materials and the way he used them, art and science in one place. My cousin was all smiles when he looked at the mirror and there it was, my future job, Dentistry. Giving smiles to people with your hands and knowledge is a great feeling. When I started dental school I found that I was raised to become a dentist. Im so meticulous and very good in practical works,I always try to do the perfect job. Being a dentist in the USA was always my dream as the level of education and clinical expertise is of highest rank in the world. When I was in the second semester of my dental school, my mom was diagnosed with stomach cancer. Although I was going through a very difficult time, I did not even think about giving up on dentistry for a moment. My mom passed away in the third year of my dental school. I still managed to surpass all that troubles and continued my studies, despite getting average marks, I did not fail any of the subjects even at the semester that I lost my mom. I learned to handle my job and control unexpected events even in the hardest part of my life. I am that kind of person who will persist until succeed. I moved to Iran after graduation and I got accepted to an advanced standing program for foreign trained dentists in the Islamic Azad University of Tehran. I finished that program successfully in one year and I started working in Tehran. I enjoyed working 8 hours a day in an impoverished region in south of tehran ( capital of iran ) more than anything else in the world. I also have a great passion for translating academic texts from english to Persian. As there is lack of good books and know ledge of english in Iran, It will help advancing dentistry there. I translated Therapeutic Guidelines oral and dental which is a reference from australian dental council to farsi for Tehran university press.I moved to USA in September 2013 and I started working as a volunteer dental assistant in a dental office. I also did research in the Oklahoma University dental school. Soon after I started there I realized that I made a good choice: The world of dentistry in United States is highly advanced and of best quality. I have an inquisitive mind and enjoy learning new materials in my field and I believe here is the right place for me. Aside from my academic career, I have also enjoyed playing sports, dancing and watercolor painting. I was in my citys swimming team when I was in high school. I also like learning different languages and I have started French recently. Although I know the road to become a registered dentist in USA is a demanding and highly competitive one, I am the person with great passion and determination and I will follow my dreams with all my heart and energy. Dentistry is my passion, hobby and dream job and I know Im going to be a great dentist in USA and I can overcome all the obstacles throughout this course and beyond.

Little T.K. and Michele Confidential Informants Assignment

Little T.K. and Michele Confidential Informants - Assignment Example Michele on the other hand is a professional dealer as well, however she looks like a sophisticated white woman and she suits the part because no one would suspect her while she tries to siphon information. Both these selected informants have past experience in being street smart and are fully aware of the danger associated with the drug world. Also, they have had bad experiences and know how to get out of tough and sticky situations. They seem to be flexible with respect to their past and form no attachment with the people they work with. These are excellent qualities to possess as a confidential informant. They would not be suspected with ease by those that are a part of the operation and are a better option than Raul and Shasha because those two have a history of being violent in the past. They might just leash out onto the investigation and give the game away and thus Little T.K and Michele seem to be more responsible and calm with respect to handling such a tough drug operation. Both of them seem the kind that would help the police rather than make their lives more difficult with respect to gaining access to information. Since they have worked in the Hood, they are fully aware of the kind of people that they will be dealing with as well as how to lead those concerned with the operation to trust them with ease. They have dealt with drugs and have also dealt with removing themselves out of situations of trouble without having to pay for consequences. They will thus be an asset to the authorities by acting as confidential informants. The department should have a strict policy concerning these informants – they need to carefully choose people who have information regarding the investigation at hand or at least have had something to do with a similar crime in their past. They should not be people who fear their lives because of the operation that they are getting themselves into and should be strong and smart about it. The department should first sign a c ontract with them regarding the confidentiality and they should not hire someone who might give the entire game away. Also, the informants must not turn up with information that cannot be verified because the operations that need to be carried out are on a very high level dealing with high crimes and potential criminals, so it must be carried out smoothly, without anyone understanding the set up. The department needs to thus sign a contract swearing in their secrecy and also turning them in to the authorities in case they spill confidential information regarding the investigation into the wrong hands or engage in some illegal activities during the course of the operation under the name of the federal police. If the informant is paid then the police should be sure to get a receipt for the transaction for obvious reasons. The work of the informant as well as all of his details should be properly documented with the police. All the paper work should be kept in a proper place for any cr oss checking. A background check needs to be done to understand the past history of the informant and all the crimes he has ever committed, the felons that he has been charged for, as well as his nature in order to understand his behavior during the course of the operation. A written approval regarding the informant’s selection must be taken from a supervisor as he must be prodded for all the information he will provide; negotiations regarding payment as well as any other incentives such as lowering a previous charge on him for

Compare and contrast how foreign antigens are recognised by the innate Essay

Compare and contrast how foreign antigens are recognised by the innate and the adaptive immunity - Essay Example The innate immunity system is composed of four main components each of which contains a large number of different types of cells. These four main components are: Phagocytes, Interferon, Compliment system and Natural Killer cells. The innate immunity is non-specific and targets every foreign antigen that it is exposed to. Also the response to these foreign antigens is very rapid. Mast cells of the innate immunity system release histamine which causes inflammation and dilation of the capillaries to allow the needed action. Adaptive immunity also aims to protect the body against infectious particles however the mode of action and the components involved are quite different from that of innate immunity. The adaptive immunity is very specific recognizing and acting against a specific antigen. The response against the antigen is quite slow when compared with the innate immunity and there is a time delay between the onset of antigens and the action taken by the adaptive immunity. The action however is targeted and once it is taken, it leads to rapid removal of antigens from the body. In both the innate and the adaptive immunity, the response to the foreign antigens takes place in two phases: the activation phase and the effector phase. The activation phase is very similar in both of these systems. During the activation phase, antigens are presented by the Major histocompatibility complexes to the T-cells. In the innate immunity the antigen is presented to the cytotoxic T cell which after recognizing the signal proliferates and produces perforin in order to lyse the infected cell. On the other hand, in the adaptive immunity, the antigens are presented to T-helper cells. The helper cells release cytokines which allow it to proliferate into clones. These clones then act on individual B-cells which cause them to proliferate and differentiate into either plasma cells or memory cells. Like the innate immunity, the adaptive

Investment and Analysis Essay Example | Topics and Well Written Essays - 1250 words

Investment and Analysis - Essay Example I would like to point out that the conventional wisdom of wisdom may not necessarily break down in situations of extreme market volatility. This is because making investments is all about diversifying in the right manner using the relevant tools. In 2008 and 2009, there was the occurrence of a serious stock-market cataclysm that led to massive loss of wealth in the US. Market reports estimated that investors lost approximately $6 trillion worth of wealth. The stock-market cataclysm not only led to massive loss of wealth but also eroded investor’s faith in the conventional wisdom of diversification. However, the failure of the diversification does not arise from the concept of diversification itself. This is because diversifying investments does work especially when done with the appropriate tools. In the newspaper excerpt, the writer noted that there is a tendency of assets correlating hence limiting the opportunity for investors to diversify. Investors who record losses durin g periods of high market volatility are the ones who do not manage to establish a well rounded portfolio. A well rounded portfolio consists of assets that do not have the tendency of swinging up and down in correlation with each other. This means that investors need to diversify their assets to include those that have very the least correlations.In recent times, starting from the year 2000, investors who have diversified their investments among companies that have different sizes have managed to record positive gains. This can be supported by the 2002-2003 performance of the bear market (Satchwell, 2004, p. 24). During this period, the S&P recorded a loss of 47.4 percent but small and undervalued companies produced a gain of 1.6 percent. Real investment trusts also managed to record a gain of 36.6 percent. The market has also in recent times recorded losses as a result of diversification. The latest occurrence of a bear market resulted in small, undervalued companies losing 59.6 percent and REITs losing 68.5 percent. This clearly indicates that what many investors seem to count as diversification does not count any further. This is attributed to the prevailing market dynamics that have changed the correlation between different assets in the market. Despite the mixed results, there is one better approach of utilizing the conventional wisdom of diversification (Jones, 2009, 200). This approach involves paying attention to the correlations of the different assets within a portfolio. Investors should consider diversifying their investments in assets that do not move in sync with each other in terms of market volatility. This can be demonstrated by an example that relates to the stock and bond markets. Given two assets that include Stock S and Bond A, the investor has to first to determine the correlation between the two. Let us assume that the two assets have a perfect negative correlation and are in a similar

Health Informatics in the Clinical, Administrative and Research Case Study

Health Informatics in the Clinical, Administrative and Research Settings - Case Study Example Even looking considering the estimate of 44,000,it clearly brings the impression that medical mistakes lead to higher death toll compared to 43,458 from motor vehicle accidents and breast cancer 42,297. Management of care.Continuity of care has been shown to suffer when several healthcare expertsmonitor the same patient, since all involved practitioners may have incomplete complete information about the medicines prescribed. Health IT and Quality improvement Lawwas introduced purposely to establish health IT fund program for hospital, domestic health agencies and skilled nurses (Bates et al 37). It requires human and health services to implement and establish a methodology under the care of Medicareprogram. They are basically for providing the hospitals with compensation of costs met by the hospitals as a result of implementing IT systems. Many errors may be detected and rectified through human inspection and knowledge; thisis an indication of weak fault reduction strategies.In 1995, it was demonstrated that about half of errors in medication, were associated with inadequate information regarding patient and drug. It has been found in a monitored trial that computerized general practitioner order, systems amounted to 55% reduction in critical medication errors. In another study of time series, the group found that 83% reduction in the entiremedication error was observed and 64% reduction done using a simple system. Another different category of medical decisional support is alerting systems which are computerized, they can notify physicians about occurring asynchronously. A developing body of evidence proposes that such system may reduce error rates while improving therapy and therefore improving outcome, the duration a patients spends in a dangerous state, survival, the length of staying in the hospital, costs. The research show that introduction of IT in hospital is very vital. It is associated with many factors. The

The Arkansas State Lottery Essay Example | Topics and Well Written Essays - 3000 words

The Arkansas State Lottery - Essay Example Based on a US 2003 Report, Arkansas ranked only 43rd in academic achievement among the 48 contiguous states in U.S. The National Education Association in 2002, meanwhile, rated Arkansan teachers' salaries at 41st place, pegged at no more than $36,962 per year. Additionally, the American Legislature Council bemoans that spending per pupil in the state is $5,764, roughly 25 percent lower than the national average of $7,557 per student (Muck). Local supporters of the lottery, hence, claim that returns drawn from the lottery would, by way of improving cash flows, facilities, technologies, and the overall serviceability of the institution, uplift the lagging educational system in the Arkansan state. Lottery money can also plug income and funding gaps critical to the overall maintenance and expansion of institutional development programs3. One such lottery supporter, Sandy Garrett, Oklahoma's state superintendent of public education, recounted that the expansion of the local scholarship program in Georgia was augured by its vigorous state lottery, and captured more fluently by its HOPE Program4. These scholarships had enabled several average or "B" students in high school land into top state-universities sans any significant financial burden (Muck). On a more On a more practical light, Rep. Shirley Walters-Greenwood of Arkansas explained that in-situ lotteries can generate savings. She mentioned that scores of people from Arkansas travel interstate to play lottery in presumably more palatable and less notorious gaming venues such as billiards halls, bingo sprees and casinos. Likewise, crossing states impose additional costs for gas and travel, and compel Arkansan