Non hodgkins lymphoma Essay Example | Topics and Well Written Essays - 1250 words

Non hodgkins lymphoma - Essay Example These cancerous cells multiply and completely destroy the lymph nodes, tissues and vessels and later spreading (metastasizing) to other organs of the body. Lymphatic system of our bodies consists of many different parts. These are the lymph vessels, the lymph fluid and the lymph nodes. The entire lymphatic system consists of a large network of the lymph vessels that spread to all parts of the body tissues by branching and forming a network. These vessels carry the clear lymph fluid, chyle, white blood cells (mainly the smaller lymphocytes comprising of the T cells and the B cells) and also other blood cells to various parts of the body. Lymph nodes are the small pea shaped globular bodies found mainly along the way of the large blood vessels in the neck region, the chest, underarms, the abdomen and pelvis region and also in the groins. Lymph vessels are connected to these nodes and they act as filter removing harmful substances (if any) like the bacteria, from the lymph fluid. The lymphatic fluids along the lymphocytes re enter the circulatory system via the upper left part of the chest. The lymphatic system also consists of the spleen , the tonsils and the thymus gland. As the lymphatic tissue is present in many parts of the body including the bone marrow, the stomach and the small intestine, the non Hodgkins lymphoma can occur almost anywhere anytime. Though, it has been noticed that, the first to get affected are generally the lymph nodes which get enlarged when affected by the lymphoma. There are many types of non Hodgkins lymphoma (NHL) that are generally seen but all can be grouped under two main types. These are the slow growing or the indolent type and the second is the fast growing or the aggressive lymphoma variety. There is also a third variety which is the intermediate type. The NHL most often than not, form from the T cells or the B cells of the lymphocytes. The lymphocytes which form a part of the white

Husbands & wives are working Essay Example for Free

Husbands wives are working Essay The study I am reviewing is Do Husbands contribute more to domestic tasks when their wives are working? This study has been researched and concluded by S. Bond. As the title suggests, this study tries to quantify the correlation between families where both partners work, compared to stay at home wives with working husbands. There have been numerous studies carried out in the area of conjugal roles in the home by sociologists such as Young Wilmot, Oakley and Martin Roberts. The writer uses information collected in the Social Trends Survey 1991 to ascertain if the new man role is still evident. Theoretical Context of the Study In this study the writer does not indicate which theoretical context he has used. I believe this study to be based upon the feminist approach, as he frequently makes reference to the roles of men and women. Specific references to the new man in the 1980s and how it did not last, displaying the stereotypical roles of males and females to be true. Methodological Approach and Methods Used The methodical approach used by S. Bond is the Positivist approach as they have used Quantitative data to collect its results. A questionnaire was used allowing the researcher to assemble the statistics that can then be easily quantified. This is possibly the easiest form of gathering information to answer specific questions and giving clear answers. The researcher has established their conclusions by using this source and produced primary data. The researcher has carried out the questionnaire on a small scale asking 10 cohabiting couples that were friends or parents of friends. It was compiled using questions to gather information on their input roles inside the household, and the time spent fulfilling these roles. As the researcher states in the report this was a quick and cheap option as they were on a limited time scale. Out of the 10 couples used 5 had the females permanently at home while the other 5 female partners worked full time. This was to see if the males in the home shared any more domestic duties as their partners worked the same hours. The questionnaire is made up of closed questions to make it easier for the researcher to turn the information into numerical data. The researcher shows how by using a questionnaire that they are using a form that is confidential and do not require any form of identity such as name or age, as there is an ethical issue in the research. The title of the questionnaire gives a clear idea of what the exact research is about, helping those taking part. The researcher collates the findings in graphs and a table. It gives a clear reading of the results. The researcher would have had to look at what method would give the best validity and reliability. A questionnaire would give the researcher good reliability.

Characterization of Invasive Group A Streptococcal Diseases, Necrotizin

Characterization of Invasive Group A Streptococcal Diseases, Necrotizing Faciitis Abstract Invasive Group A Streptococcus has been around the human civilization since the beginning of our existence, and it continues to be a threat today. Invasive Group A Streptococcus, known as invasive GAS, occurs around 9400 times a year in the United States alone, while it is unknown about the rest of the world due to recording inconsistencies. This bacterium exists as one of the most common flora in humans, and can only start infection when there is a region which has been opened. For example, these regions could include the blood, muscles, and other various locations. Necrotizing fasciitis, dubbed as the "flesh-eating bacteria" by the media, is one of the known bacteria within the invasive group A Streptococcus. Although the mortality and morbidity rate of necrotizing fasciitis is at 70-80%, treatment may reduce it to 30-50%. Invasive Group A Streptococcus disease, known as invasive GAS, is a disease that stems from the Group A bacterium found on the throat and skin. This bacterium is known as Streptococcus pygoenes. A bacterium of this strain is a gram-positive, nonmotile, nonsporeforming coccus that occurs in chains or in pairs in cells. The individual cells of this bacterium are round cocci, about .6-1.0 micrometer in diameter. The bacteria divides in 1 plane, therefore, cells occur in pairs or in chains of various lengths. Streptococcus pygoenes is also a catalase-negative nervetolerant microbe anaerobe. It requires certain encriched mediums that contain blood in order to divide and grow. GAS contains a capsule of hyaluronic acid, which makes it exhibit hemolysis, which are white colonies on blood agar. S. pyogenes is always foun... ...hould take care to protect themselves from this bacteria. Although it is not always possible, since this bacterium is found in 5-15% of humans as normal flora, there are always ways to help Characterization of Invasive Group? 5 prevent it. While this invasive Group A Streptococcus is not as rampant as before antibiotics were introduced, it is still a major problem in certain areas in the world, so research on better ways to eliminate this disease should continue. References: Infectious Diseases and Immunization Committee. (1999, April 4). Invasive Group A Streptococcal Diseases. Streptococcal Diseases. July 26, 2005: http://www.cps.ca/english/statements/ID/id98-05.htm Maynor, M. (2005, January). Necrotizing Fasciits. Infectious Diseases. July 26, 2005: http://www.emedicine.com/EMERG/topic332.htm Skinner, F. (1987). Streptococci. New York: Academic Press Inc.

F. Scott Fitzgerald’s “The Great Gatsby” and Brett Easton Ellis’ “Less Than Zero” Essay

Explore the function of the narrator in F. Scott Fitzgerald’s â€Å"The Great Gatsby† and Brett Easton Ellis’ â€Å"Less Than Zero† Published in 1925 by author F. Scott Fitzgerald, The Great Gatsby, is considered a literary classic by many critics. The eponymous novel is set in the â€Å"Roaring 1920’s† post World War 1 and tells the tale of Jay Gatsby through the novel’s narrator, Nick Carraway. The exposition begins when we are told of the socio-cultural divide between the upper class of America, by a character who has just moved to Long Island from Minnesota. The clear separation between West Egg and East Egg is an idea explored by Nick, who is a resident of the â€Å"lower-upper† class West Egg. Throughout the novel, it can be observed that events that occur are a direct parallel to the life of Scott Fitzgerald, as he projects characteristics of both Gatsby and Nick that were similar to his own. It is widely believed that the book is written in a manner that is cynical of the American Dream and of the elitist society, in a biased fashion that favours Gatsby. Conversely, Less Than Zero is a novel set in the 1980s and tells the story of affluent college students, who lead hedonistic lifestyles with the security of their parents’ wealth. Brett Easton Ellis’ first novel in his oeuvre is written during the years following the Vietnam War of economic prosperity in Reagan’s America and highlights the fragmented society caused by passionless relationships between friends and family and the lack of morality present in upper class America. The two novels contrast in the cities that they are set in; The Great Gatsby is set in New York’s Long Island, whilst Less Than Zero is set in California on the opposite coast of America. However the behaviour of the two generations is quite similar, and is reflective of the influence of money on higher-class society during the respective periods. In The Great Gatsby, Nick Carraway is not only the narrator, but also a character that actively participates in the novel and it his opinion that dictates how the reader perceives other characters. One obvious example of this is in the novel’s title, as the epithet â€Å"Great† is used to describe a character that the reader has not yet met. This suggests that Nick Carraway idolizes Gatsby in some aspects and to some degree, aspires to what Gatsby represents. â€Å"†¦ Produced like the supper, no doubt, out of a caterers basket.† This short extract is taken from a section where Nick is describing a lavish party that is frequently held by Gatsby. The metaphor implies that Gatsby is almost God-like in the way he is able to throw extravagant parties yet remains anonymous to those that attend. During the 1920’s, there was a period of what was known as prohibition, where all alcohol was banned, and yet people are often described drinking throughout The Great Gatsby. This could be a condemnation of upper class society, as it suggests they are just as immoral, if not more so, than the lower classes. Fitzgerald himself went from a family of mediocrity to a sudden rise in splendor through his writings, and can therefore relate to the awe that one might feel when acclimatizing to such a society. Less Than Zero’s narrator, Clay, does not represent its author in the same way as Nick does, however Easton-Ellis uses Clay to magnify the issues that surrounded affluent college students during the 80s. Clay often negatively portrays the actions of other characters, which can be seen as an act of hypocrisy. For example, â€Å"Because you both stole a quarter gram of cocaine from me the last time I left my door open. That’s why.† At this point, Clay accuses his sisters of stealing his cocaine, which they put down to him â€Å"leaving his door unlocked†. This may be a reference to the lack of privacy or a lack of trust within society to such a degree that one cannot trust even their closest family. Nick Carraway is arguably a biased narrator, through his romanticized and idealized description of the novel’s protagonist and adversely, his foil, Tom Buchanan. On their first encounter Nick describes Gatsby’s gestures with authority for example, â€Å"He had one of those rare smiles with a quality of eternal reassurance in it, that you may come across four or five times in life. It faced, or seemed to face, the whole external world for an instant and then concentrated on you with an irresistible prejudice in your favor. It understood you just as far as you wanted to be understood, believed in you as you would like to believe in yourself† This quotation epitomizes Nick’s admiration for Gatsby before he has properly met him and implies that he has already formulated an opinion based upon rumours he has heard but also based on the party Gatsby invited him to. Once again, this is may be seen as a condemnation of American society by Fitzgerald who shows that capitalist and superficiality was a major factor in defining an individual. Gatsby’s flawless persona does deteriorate as the novel progresses and as Gatsby comes close to achieving his dream, however Nick appears to glaze over this and as a result, preserves Gatsby’s â€Å"greatness† to the reader. The use of the affectation â€Å"old sport† throughout Gatsby’s communication with Nick highlights a friendship that is neither formal nor informal but rather one of an illusionary nature. This is to say that Gatsby uses the affectation in order to evoke a more appealing, intellectual persona. Despite Nick seeing through his faà §ade, he chooses to ignore the matter, instead only becomes more infatuated with what Gatsby represents. â€Å"What part of the Middle West?’ I inquired casually.’ ‘San Francisco’ ‘I see† It is apparent that Nick knows San Francisco is not in the Middle West but rather on the west coast yet he chooses not to argue as if Gatsby’s word is unequivocally truth. Claire Stocks puts this infatuation down to a likeness that both men share which is that â€Å"[both men] seem to be the victims of insufficient or thwarted inheritances†¦ They are both forced to work for their living†. It can be suggested that towards the end of Less Than Zero, Clay wants to leave this society as he narrates, â€Å"My eyes keep wandering off the screen and to the two green exit signs that hang over the two doors in the back of the theater† This occurs whilst Clay, Blair and Kim are in the cinema watching a â€Å"gory† film and highlights that Clay does in fact have some form of morality despite the actions that he part-takes in. Easton-Ellis reveals a character that is torn between being moral or following the hedonistic life he is so easily acclimatized to. Fitzgerald also uses Nick Carraway as a way of criticizing the society that he strives to be a part of. This is evident in Chapter 2, where Nick spends time with Tom, Myrtle and Mr. Wilson, â€Å"I was within and without, simultaneously enchanted and repelled by the inexhaustible variety of life.† At this point, Nick may be referring to the â€Å"variety† of classes that are present, as Myrtle and Mr. Wilson are of a lower class, himself of middle class and Tom from the upper echelons of society. It may be seen that Fitzgerald could not stand the behavior of the people he became associated with, however realized that their behavior was a result of what he sought after, in terms of the â€Å"American dream† and therefore feels â€Å"enchanted† by the hedonistic nature of the upper class. Nevertheless, Fitzgerald also highlights the vast socio-cultural divide between classes and as such presents the reader with an ambiguous view of fractured relationships. Clay also presents his own society with undertones of disdain, being cynical of the netherworld through his direct and succinct account of various events that take place. He rarely places emotion or opinion in his description of events and as a result, it seems that he is more of a trustworthy narrator. This is most evident when he recounts the viewing of a â€Å"snuff† movie, â€Å"It looks like a toolbox and I’m confused for a minute and Blair walks out of the room. And he takes out an ice pick and what looks like a wire hanger and a package of nails and then a thin, large knife and he comes toward the girl and Daniel smiles and nudges me in the ribs.† The repeated use of polysyndeton gives the reader the impression that Clay is not properly viewing the movie; instead, he is almost analyzing it as if it were a novel. The lack of sensory description also implies that Clay is trying to distance himself from this and that he sees the crude and disgusting nature of what he is being shown. At this time, snuff films had just been exposed and were not an unknown phenomenon. Therefore, Easton-Ellis may be suggesting that society has lost its moral compass/guidance, being reduced to ignoring such shocking acts. However, in spite of this, Clay does offer himself as a more intellectual individual compared to other characters, by the way he looks at the billboard that is titled â€Å"Disappear Here†. Evidently he does not choose to â€Å"disappear† and instead stays amongst the morally obsolete society that he is attached to and this ultimately leads to the dà ©nouement in which he is forced to leave his society. Both novels differ in the tone in which they are written though the contexts are very similar despite being in diverse decades. On the one hand, there is Nick who is biased towards one specific character and seems to show disdain for the society that he once strived for, and on the other, Clay, who has a more direct approach to narration and more expressively communicates the plot to the reader. Overall, the two narrators are used to convey to very different ideas that are relevant to their contexts. The Great Gatsby is narrated such that the reader is almost forced into liking Gatsby despite his clear superficiality, which is upheld by trivial objects such as â€Å"real books† and medals with â€Å"authentic looks†. Less Than Zero poses are more critical view of society, with the narrator becoming confused by the moral ambiguity and generally growing to hate the society that he belongs to as it has been reduced to individualism and by an large a fractured society whereby â€Å"people are afraid to merge†.

Controversial issues in psychology Essay

Controversial issues in psychology are those that cause the greatest concern within both psychology and within society as a whole. Advertising uses techniques of persuasion to manipulate people’s behaviour in the desired direction of the perpetrator of the persuasive message, which uses invasive and exploitative techniques and try to show that social norms and values are not always for the best. Advertisements are a set of shorthand signals about products we are to buy and the circumstances we would use them in. They are a ready source of stereotypes, sexual, regional and cultural, e. g. families are always happy and adults are always employed. The first advertisement on TV in the UK was for Gibbs SR’s toothpaste. The ad has become an icon of the consumer age, and psychologists have become increasingly fascinated by the art of persuading people, despite its controversies. What persuades people to buy or use the advertiser’s product or service is how the advert makes them feel, i. e. the meaning we attach to the advert. However the advert is interpreted by the individual, the impact of any advertisement is what it means to us. The author invites us to participate in constructing a meaning for the advert. O’Barr (1994) suggests that advertisers create an advertisement for us to use as a skeleton to add flesh to and breathe life into. Another area controversy in advertising is that it is difficult to disentangle the impact of advertising from other influences that might be current at that time. Hedges (1982) points out that to the consumers, advertising is just part of their background – advertisements form just one part of the sensory bombardment that we experience every day. We cannot stop to evaluate every piece of sensory input, so for the most part, advertisements are relegated to fairly low levels of consciousness. Advertisers use many psychological theories to make their work successful, including associating their product with a particular emotion or image. A need for an item must be created, therefore we must be motivated. In the case of pre-existing needs, such as for bread, the motive must be to buy a particular brand (e. g. through price, quality). Where there is no pre-existing need, it must be created, as in the case of children’s toys. Neurological research has shown that the left hemisphere of the brain is more concerned with ‘practical’ functions such as language, where styles of response are, foe example, verbal and analytic. The right hemisphere is more concerned with spatial, imaginative processing, where responses concern feelings and are, perhaps, unconscious. Lannon and Cooper (1983) suggested that because of this, much advertising is geared towards the right hemisphere. Fast marketing is a relatively new approach, which targets those that have developed brand loyalty and become offensive when they are offered a new alternative. This creates problems for advertisers trying to target new groups, so a blitz of free samples is distributed (fast marketing) so that everyone has a chance of trying out the new product. Consumers are then more likely to change their attitudes or opinions about the product, and so the advertisers will have succeeded. People are also more easily persuaded to change their minds after witnessing testimonials or adverts which use someone who they think is admirable or attractive, such as sports heroes or actresses (Pratkanis and Aronson, 1992). Advertisers typically pair an attractive person or item (unconditioned stimulus) with their product (conditioned stimulus) to produce a positive attitude towards their product (conditioned response). This helps to give positive attitudes towards the products.

The History of Income Tax in the U.S.

The History of Income Tax in the U.S. Every year, people in the United States frantically race to get their taxes done by mid-April. While shuffling papers, filling out forms, and calculating numbers, have you ever stopped to wonder where and how the concept of income taxes originated? The idea of a personal income tax is a modern invention, with the first, permanent U.S. income tax law in October 1913. However, the general concept of taxation is an age-old idea that has long shaped history. Ancient Times The first, known, written record of taxes dates back to ancient Egypt. At that time, taxes were not given in the form of money, but rather as items such as grain, livestock, or oils. Taxes were such an important part of ancient Egyptian life that many of the surviving hieroglyphic tablets are about taxes. Although many of these tablets are records of how much people paid, some describe people complaining about their high taxes. And no wonder people complained! The taxes were often so high, that at least on one surviving hieroglyphic tablet, tax collectors are depicted punishing peasants for not having paid their taxes on time. Egyptians were not the only ancient people to hate tax collectors. Ancient Sumerians had a proverb, You can have a lord, you can have a king, but the man to fear is the tax collector! Resistance to Taxation Nearly as old as the history of taxes - and the hatred of tax collectors - is resistance to unfair taxes. For instance, when Queen Boadicea of the British Isles decided to defy the Romans in 60 CE, it was in large part because of the brutal taxation policy placed upon her people. The Romans, in an attempt to subdue Queen Boadicea, publicly flogged the queen and raped her two daughters. To the great surprise of the Romans, Queen Boadicea was anything but subdued by this treatment. She retaliated by leading her people in an all-out, bloody revolt, eventually killing approximately 70,000 Romans. A much less gory example of resistance to taxes is the story of Lady Godiva. Although many may remember that in the legend, Lady Godiva of the 11th century rode through the town of Coventry naked, most probably do not remember that she did so to protest her husbands harsh taxes on the people. Perhaps the most famous historical incident that relates to the resistance to taxes was the Boston Tea Party in Colonial America. In 1773, a group of colonists, dressed as Native Americans, boarded three English ships moored in Boston Harbor. These colonists then spent hours smashing the ships cargo, wooden chests filled with tea and then throwing the damaged boxes over the side of the ships. American colonists had been heavily taxed for over a decade with such legislation from Great Britain as the Stamp Act of 1765 (which added taxes to newspapers, permits, playing cards, and legal documents) and the Townsend Act of 1767 (which added taxes to paper, paint, and tea). The colonists threw the tea over the side of the ships to protest what they saw as the very unfair practice of taxation without representation. Taxation, one might argue, was one of the major injustices that led directly to the American War for Independence. Thus, the leaders of the newly created United States had to be very careful as to how and exactly what they taxed. Alexander Hamilton, the new U.S. Secretary of the Treasury, needed to find a way to collect money to lower the national debt, created by the American Revolution. In 1791, Hamilton, balancing the need of the federal government to collect money and the sensitivity of the American people, decided to create a sin tax, a tax placed on an item society feels is a vice. The item chosen for the tax was distilled spirits. Unfortunately, the tax was seen as unfair by those on the frontier who distilled more alcohol, especially whiskey, than their eastern counterparts. Along the frontier, isolated protests eventually led to an armed revolt, known as the Whiskey Rebellion. Revenue for War Alexander Hamilton was not the first man in history with the dilemma of how to raise money to pay for a war. The need for a government to be able to pay for troops and supplies in wartime had been a major reason for ancient Egyptians, Romans, medieval kings, and governments around the world to increase taxes or to create new ones. Although these governments had often been creative in their new taxes, the concept of an income tax had to wait for the modern era. Income taxes (requiring individuals to pay a percentage of their income to the government, often on a graduated scale) required the ability to retain extremely detailed records. Throughout most of history, keeping track of individual records would have been a logistical impossibility. Thus, the implementation of an income tax was not found until 1799 in Great Britain. The new tax, viewed as a temporary one, was needed to help the British raise money to fight the French forces led by Napoleon. The U.S. government faced a similar dilemma during the War of 1812. Based on the British model, the U.S. government considered raising money for the war through an income tax. However, the war ended before the income tax was officially enacted. The idea of creating an income tax resurfaced during the American Civil War. Again considered a temporary tax to raise money for a war, Congress passed the Revenue Act of 1861 which instituted an income tax. However, there were so many problems with the details of the income tax law that income taxes were not collected until the law was revised the following year in the Tax Act of 1862. In addition to adding taxes on feathers, gunpowder, billiard tables, and leather, the Tax Act of 1862 specified that the income tax would require those that earned up to $10,000 to pay the government three percent of their income while those that made over $10,000 would pay five percent. Also notable was the inclusion of a $600 standard deductible. The income tax law was amended several times over the next few years and eventually fully repealed in 1872. Beginnings of a Permanent Income Tax In the 1890s, the U.S. federal government was beginning to rethink its general taxation plan. Historically, most of its revenue had been from taxing imported and exported goods as well as taxes on the sale of specific products. Realizing that these taxes were increasingly bearing on only a select portion of the population, mostly the less affluent, the U.S. federal government began looking for a more even way to distribute the tax burden. Thinking that a  graduated-scale  income tax placed upon all citizens of the United States would be a fair way to collect taxes, the federal government attempted to enact a country-wide income tax in 1894. However, because at that time all federal taxes had to be based on state population, the income tax law was found unconstitutional by the U.S. Supreme Court in 1895. To create a  permanent income tax, the Constitution of the United States needed to be changed. In 1913, the 16th Amendment to the Constitution was ratified. This amendment eliminated the need to base federal taxes on state population by stating: The Congress shall have  the power  to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration. In October of 1913, the same year the 16th Amendment was ratified, the federal government enacted its first permanent income tax law. Also in 1913, the  first Form 1040  was created. Today, the IRS collects more than $1.2 billion in taxes and processes more than 133 million returns annually.

Chemicals That Should Never Be Mixed

Chemicals That Should Never Be Mixed Some chemicals shouldnt be mixed together. In fact, these chemicals shouldnt even be stored near each other on the chance that an accident could occur and the chemicals could react. Be sure to keep incompatibilities in mind when reusing containers to store other chemicals. Here are some examples of mixtures to avoid: Acids with cyanide salts or cyanide solution. Generates highly toxic hydrogen cyanide gas.Acids with sulfide salts or sulfide solutions. Generates highly toxic hydrogen sulfide gas.Acids with bleach. Generates highly toxic chlorine gas. An example of this would be mixing bleach and vinegar.Ammonia with bleach. Releases toxic chloramine vapors.Oxidizing acids (e.g., nitric acid, perchloric acid) with combustible materials (e.g., paper, alcohols, other common solvents). May result in a fire.​Solid oxidizers (e.g., permanganates, iodates, nitrates) with combustible materials (e.g., paper, alcohols, other common solvents). May result in a fire.Hydrides (e.g., sodium hydride) with water. May form flammable hydrogen gas.Phosphides (e.g., sodium phosphide) with water. May form highly toxic phosphine gas.Silver salts with ammonia in the presence of a strong base. May generate an explosively unstable solid.Alkali metals (e.g., sodium, potassium) with water. May form flammable hydrogen gas.Oxidizing agents (e.g., nitric acid) with reducing agents (e.g., hydrazine). May cause fires or explosions. Unsaturated compounds (e.g., substances containing carbonyls or double bonds) in the presence of acids or bases. May polymerize violently.Hydrogen peroxide/acetone mixtures when heated in the presence of an acid. May cause explosions.Hydrogen peroxide/acetic acid mixtures. May explode upon heating.Hydrogen peroxide/sulfuric acid mixtures. May spontaneously detonate. General Advice About Mixing Chemicals While it may seem like chemistry is a good science to learn through experimentation, its never a good idea to randomly mix together chemicals to see what youll get. Household chemicals arent any safer than lab chemicals. In particular, you should use care when dealing with cleaners and disinfectants, since these are common products that react with each other to yield nasty results. Its a good rule of thumb to avoid mixing bleach or peroxide with any other chemical, unless youre following a documented procedure, are wearing protective gear, and are working under a fume hood or outdoors. Note that many chemical mixtures produce toxic or flammable gases. Even in the home, its important to have a fire extinguisher handy and work with ventilation. Use caution performing any chemical reaction near an open flame or heat source. In the lab, avoid mixing chemicals near burners. At home, avoid mixing chemicals near burners, heaters, and open flames. This includes pilot lights for ovens, fireplaces, and water heaters. While its common to label chemicals and store them separately in a lab, its also good practice to do this in a home. For example, dont store muriatic acid (hydrochloric acid) with peroxide. Avoid storing household bleach together with peroxide and acetone.