"squabbling. The dentist arrives, and his first patient goes in, obviously in pain. The dentist prepares the nitrous oxide anaesthesic (also known commonly as ""laughing gas"" due to its effects prior to and after unconsciousness). With the man unconscious he pulls his tooth, but then he can't get him to wake up. He calls for Charlie and when he arrives the dentist runs off. Charlie tries to wake him and eventually tries hitting his head with a mallet. The man revives but starts laughing. Charlie knocks him out with the mallet. The dentist then returns and Charlie is sent to"
"Nitrous oxide Nitrous oxide, commonly known as laughing gas or nitrous, is a chemical compound, an oxide of nitrogen with the formula . At room temperature, it is a colourless non-flammable gas, with a slight metallic scent and taste. At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen. It is soluble in water. Nitrous oxide has significant medical uses, especially in surgery and dentistry, for its anaesthetic and pain reducing effects. Its name ""laughing gas"", coined by Humphry Davy, is due to the euphoric effects upon inhaling it, a property that has led to its recreational"
"previously, which is very serious and can even be fatal Nitrous oxide, also sometimes known as laughing gas, is a legally available gas used for purposes that include anesthesia during certain dental and surgical procedures, as well as food preparation and the fueling of rocket and racing engines. Substance abusers also sometimes use the gas as an inhalant. Like all other inhalants, it's popular because it provides consciousness-altering effects while allowing users to avoid some of the legal issues surrounding illicit or illegal drugs of abuse. Abuse of nitrogenous oxide can produce significant short-term and long-term damage to human health,"
"Mr. Wigg, is said to float because of an excess of ""laughing gas"", although it is clear that the term is not used in the chemical sense. So-called ""laughing gas"" (nitrous oxide) was one of the earliest effective anaesthetics developed in the Nineteenth century. it was popularised by dentists, for pain-free tooth extractions, as well as by showground novelty booths. Customers at the booth would be gassed and, as they were recovering from the drugged sleep they often felt euphoric and giggly. Hence the name. A famous 1931 British comedy sketch starring Cicely Courtneidge, called ""Laughing Gas"", was based on"
"transfer of nitrous oxide from bulk cylinders to smaller, more transportable E-type, 1590 liter-capacity tanks, is legal when the intended use of the gas is for medical anaesthesia. Nitrous oxide Nitrous oxide, commonly known as laughing gas or nitrous, is a chemical compound, an oxide of nitrogen with the formula . At room temperature, it is a colourless non-flammable gas, with a slight metallic scent and taste. At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen. It is soluble in water. Nitrous oxide has significant medical uses, especially in surgery and dentistry, for its anaesthetic and"
"clinical cautions in place for the first two trimesters of pregnancy and in patients with decreased levels of consciousness. The gas is a mixture of half nitrous oxide (NO or laughing gas) and half oxygen (O). The ability to combine NO (nitrous oxide is the common name; dinitrogen monoxide, systematic name) and oxygen at high pressure while remaining in the gaseous form is caused by the Poynting effect (after John Henry Poynting, an English physicist). The Poynting effect involves the dissolution of gaseous O when bubbled through liquid NO, with vaporisation of the liquid to form a gaseous O/NO mixture."
"Rapidly growing in popularity, laughter therapy, or humor therapy, focuses on promoting laughter as a therapeutic tool. Usually implemented in a group, laughter therapy uses a variety of gag jokes like red noses and magic tricks to encourage laughter - fake or real. Laughter causes the bodies' muscles to relax which increases blood flow and oxygen intake. Proposed benefits include: Stress management, relaxation, improved mental functions, improved digestion and pain relief. Some suggest that laughter activates similar brain wave frequencies as a meditative state. However, scientific studies of these benefits are limited and have methodological issues. Amusement Amusement, from the"
"things. And this is one of them."" Laugh track A laugh track (or laughter track) is a separate soundtrack for a recorded comedy show containing the sound of audience laughter. In some productions, the laughter is a live audience response instead; in the United States, where it is most commonly used, the term usually implies artificial laughter (canned laughter or fake laughter) made to be inserted into the show. This was invented by American sound engineer Charles ""Charley"" Douglass. The Douglass laugh track became a standard in mainstream television in the U.S., dominating most prime-time sitcoms from the late 1950s"
"Laugh track A laugh track (or laughter track) is a separate soundtrack for a recorded comedy show containing the sound of audience laughter. In some productions, the laughter is a live audience response instead; in the United States, where it is most commonly used, the term usually implies artificial laughter (canned laughter or fake laughter) made to be inserted into the show. This was invented by American sound engineer Charles ""Charley"" Douglass. The Douglass laugh track became a standard in mainstream television in the U.S., dominating most prime-time sitcoms from the late 1950s to the late 1970s. Usage of the"
"Davy, wrote to Davies Gilbert, ""I am now as much convinced of the non-existence of caloric as I am of the existence of light."" In another letter to Gilbert, on 10 April, Davy informs him: ""I made a discovery yesterday which proves how necessary it is to repeat experiments. The gaseous oxide of azote (the laughing gas) is perfectly respirable when pure. It is never deleterious but when it contains nitrous gas. I have found a mode of making it pure."" He said that he breathed sixteen quarts of it for nearly seven minutes, and that it ""absolutely intoxicated me."""
"Laughter Laughter is a physical reaction in humans consisting typically of rhythmical, often audible contractions of the diaphragm and other parts of the respiratory system. It is a response to certain external or internal stimuli. Laughter can arise from such activities as being tickled, or from humorous stories or thoughts. Most commonly, it is considered a visual expression of a number of positive emotional states, such as joy, mirth, happiness, relief, etc. On some occasions, however, it may be caused by contrary emotional states such as embarrassment, apology, or confusion such as nervous laughter or courtesy laugh. Age, gender, education,"
"people thought this gas to be lethal, even in small doses, like some other nitrogen oxides. However, in 1799, British chemist and inventor Humphry Davy decided to find out by experimenting on himself. To his astonishment he found that nitrous oxide made him laugh, so he nicknamed it ""laughing gas"". In 1800 Davy wrote about the potential anesthetic properties of nitrous oxide in relieving pain during surgery, but nobody at that time pursued the matter any further. American physician Crawford W. Long noticed that his friends felt no pain when they injured themselves while staggering around under the influence of"
"Recreational use of nitrous oxide Recreational use of nitrous oxide is the inhalation of nitrous oxide gas for its euphoriant effects. The gas is sometimes called Whippets, Laughing Gas, the Epiphany Drug, or Hippy Crack. In Australia, nitrous oxide bulbs are known as nangs. Nitrous oxide is a dissociative inhalant that can cause analgesia, depersonalisation, derealisation, dizziness, euphoria, and some sound distortion (flanging). In some cases, it may cause slight hallucinations and have a mild aphrodisiac effect. Research has also found that it increases suggestibility and imagination. Inhalation of nitrous oxide for recreational use, with the purpose of causing euphoria"
"in drowning), smoke, food, vomitus and less common foreign substances (e.g. tooth fragments, coins, batteries, small toy parts, needles). Legal – helium, nitrous oxide (""laughing gas"") Illegal – various gaseous, vaporised or aerosolized recreational drugs Various specialized investigations use the inhalation of known substances for diagnostic purposes. Examples include pulmonary function testing (e.g. nitrogen washout test, diffusion capacity testing (carbon monoxide, helium, methane)) and diagnostic radiology (eg.radioactive xenon isotopes). Gases and other drugs used in anaesthesia include oxygen, nitrous oxide, helium, xenon, volatile anaesthetic agents. Medication for asthma, croup, cystic fibrosis and some other conditions. Carbon monoxide from vehicle exhaust"
"to be sold for human consumption, 'food grade' nitrous oxide canisters, made for the purpose of prolonging the shelf life of whipped cream and other products are completely legal, and anyone can buy these without a permit. Recreational use of nitrous oxide Recreational use of nitrous oxide is the inhalation of nitrous oxide gas for its euphoriant effects. The gas is sometimes called Whippets, Laughing Gas, the Epiphany Drug, or Hippy Crack. In Australia, nitrous oxide bulbs are known as nangs. Nitrous oxide is a dissociative inhalant that can cause analgesia, depersonalisation, derealisation, dizziness, euphoria, and some sound distortion (flanging)."
"Tear gas Tear gas, formally known as a lachrymator agent or lachrymator (from the Latin ""lacrima"", meaning ""tear""), sometimes colloquially known as mace, is a chemical weapon that causes severe eye and respiratory pain, skin irritation, bleeding, and even blindness. In the eye, it stimulates the nerves of the lacrimal gland to produce tears. Common lachrymators include pepper spray (OC gas), PAVA spray (nonivamide), CS gas, CR gas, CN gas (phenacyl chloride), bromoacetone, xylyl bromide, syn-propanethial-S-oxide (from onions), and Mace (a branded mixture). Lachrymatory agents are commonly used for riot control. Their use in warfare is prohibited by various international"
"cannot control the laughter or one’s body, sometimes leading to seizures or a brief period of unconsciousness. Some believe that fits of laughter represent a form of epilepsy. Laughter has been used as a therapeutic tool for many years because it is a natural form of medicine. Laughter is available to everyone and it provides benefits to a person's physical, emotional, and social well being. Some of the benefits of using laughter therapy are that it can relieve stress and relax the whole body. It can also boost the immune system and release endorphins to relieve pain. Additionally, laughter can"
"halogenating agents. Nitrogen forms nine molecular oxides, some of which were the first gases to be identified: NO (nitrous oxide), NO (nitric oxide), NO (dinitrogen trioxide), NO (nitrogen dioxide), NO (dinitrogen tetroxide), NO (dinitrogen pentoxide), NO (nitrosylazide), and N(NO) (trinitramide). All are thermally unstable towards decomposition to their elements. One other possible oxide that has not yet been synthesised is oxatetrazole (NO), an aromatic ring. Nitrous oxide (NO), better known as laughing gas, is made by thermal decomposition of molten ammonium nitrate at 250 °C. This is a redox reaction and thus nitric oxide and nitrogen are also produced as"
"and/or slight hallucinations, began as a phenomenon for the British upper class in 1799, known as ""laughing gas parties"". During the 19th century, William James and many contemporaries found that inhalation of nitrous oxide resulted in a powerful spiritual and mystical experience for the user. James claimed to experience the fusing of dichotomies into a unity and a revelation of ultimate truth during the inhalation of nitrous oxide. Memory of this experience, however, quickly faded and any attempt to communicate was difficult at best. James described a man who, when under the influence of the gas, claimed to know the"
"trait and he offered many examples of different triggers for laughter with their own distinct explanations. Laughter Laughter is a physical reaction in humans consisting typically of rhythmical, often audible contractions of the diaphragm and other parts of the respiratory system. It is a response to certain external or internal stimuli. Laughter can arise from such activities as being tickled, or from humorous stories or thoughts. Most commonly, it is considered a visual expression of a number of positive emotional states, such as joy, mirth, happiness, relief, etc. On some occasions, however, it may be caused by contrary emotional states"
"subject. The study suggested that laughter produced an ""endorphin-mediated opiate effect"" which could ""play a crucial role in social bonding"". Laughter yoga Laughter yoga (""Hasyayoga"") is a practice involving prolonged voluntary laughter. Laughter yoga is based on the belief that voluntary laughter provides the same physiological and psychological benefits as spontaneous laughter. Laughter yoga is done in groups, with eye contact, jokes and playfulness between participants. Forced laughter soon turns into real and contagious laughter. In the mid-1990s, laughter yoga was practiced in the early mornings in open parks, primarily by groups of older people. Laughter yoga was made popular"
"for scornful laughter. From the evolved the , thence the , and ultimately the familiar English adjectival form, ""sardonic"". ""Risus sardonicus"" is an apparent smile on the face of those who are convulsing because of tetanus, or strychnine poisoning. From the ""Oxford English Dictionary"", ""A fixed, grin-like expression resulting from spasm of facial muscles, esp. in tetanus."" Also: [Convulsion of the] facial muscles may cause a characteristic expression called ""Risus sardonicus"" (from the Latin for scornful laughter) or ""Risus caninus"" (from the Latin for doglike laughter or grinning). This facial expression has also been observed among patients with tetanus. ""Risus"
"are pushing to develop the sensors as well. The term represents several forms of nitrogen oxides such as NO (nitric oxide), NO (nitrogen dioxide) and NO (nitrous oxide aka laughing gas). In a gasoline engine NO is the most common form of being around 93% while NO is around 5% and the rest is NO. There are other forms of such as NO (the dimer of NO), which only exists at lower temperatures, and NO, for example. However, owing to much higher combustion temperatures due to high cylinder compression and turbo or supercharging, diesel engines produce much higher engine-out emissions"
"a method similar to the previous experiment, the participants were shown a short humorous video clip and then tested for the effects. The participants showed a significant increase in SIgA levels. There have been claims that laughter can be a supplement for cardiovascular exercise and might increase muscle tone. However an early study by Paskind J. showed that laughter can lead to a decrease in skeletal muscle tone because the short intense muscle contractions caused by laughter are followed by longer periods of muscle relaxation. The cardiovascular benefits of laughter also seem to be just a figment of imagination as"
"condition known as aphonogelia. Neurophysiology indicates that laughter is linked with the activation of the ventromedial prefrontal cortex, that produces endorphins. Scientists have shown that parts of the limbic system are involved in laughter. This system is involved in emotions and helps us with functions necessary for humans' survival. The structures in the limbic system that are involved in laughter are the hippocampus and the amygdala. The December 7, 1984, Journal of the American Medical Association describes the neurological causes of laughter as follows: Some drugs are well known for their laughter-facilitating properties (e. g. ethanol and cannabis), while the"
"the unusual effects of nitrous oxide, which came to be known as laughing gas. Chlorine was discovered in 1774 by Swedish chemist Carl Wilhelm Scheele, who called it """"dephlogisticated marine acid"""" (see phlogiston theory) and mistakenly thought it contained oxygen. Scheele observed several properties of chlorine gas, such as its bleaching effect on litmus, its deadly effect on insects, its yellow-green colour, and the similarity of its smell to that of aqua regia. However, Scheele was unable to publish his findings at the time. In 1810, chlorine was given its current name by Humphry Davy (derived from the Greek word"
"person can itself provoke laughter from others as a positive feedback. The study of humor and laughter, and its psychological and physiological effects on the human body, is called gelotology. Laughter might be thought of as an audible expression or appearance of excitement, an inward feeling of joy and happiness. It may ensue from jokes, tickling, and other stimuli completely unrelated to psychological state, such as nitrous oxide. One group of researchers speculated that noises from infants as early as 16 days old may be vocal laughing sounds or laughter, however the weight of the evidence supports its appearance at"
"Nervous laughter Nervous laughter is laughter evoked from an audience's expression of embarrassment, alarm, discomfort or confusion, rather than amusement. Nervous laughter is usually less robust in expression than ""a good belly laugh"", and may be combined with confused glances or awkward silence on the part of others in the audience. Nervous laughter is considered analogous to a courtesy laugh, which may be rendered by more of a conscious effort in an attempt to move a situation along more quickly, especially when the comedian is pausing for laughter. Nervous laughter is a physical reaction to stress, tension, confusion, or anxiety."
"Breathing gas A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common, and only natural, breathing gas. But other mixtures of gases, or pure gases, are also used in breathing equipment and enclosed habitats such as scuba equipment, surface supplied diving equipment, recompression chambers, submarines, space suits, spacecraft, medical life support and first aid equipment, high-altitude mountaineering and anaesthetic machines. Oxygen is the essential component for any breathing gas, at a partial pressure of between roughly 0.16 and 1.60 bar at the ambient pressure. The oxygen is usually the only"
"leads to visual field loss and ultimately blindness. Uveoscleral outflow of aqueous humour can be increased with prostaglandin agonists, while trabecular outflow is increased by M3 agonists. Fluid production can be decreased by beta blockers, alpha2-agonists, and carbonic anhydrase inhibitors. Aqueous humour The aqueous humour is a transparent, watery fluid similar to plasma, but containing low protein concentrations. It is secreted from the ciliary epithelium, a structure supporting the lens. It fills both the anterior and the posterior chambers of the eye, and is not to be confused with the vitreous humour, which is located in the space between the"
"Laughingthrush The laughingthrushes are in the genera ""Garrulax"", ""Montecincla"" and ""Trochalopteron"" of the Leiothrichidae family of passerine birds. They primarily occur in tropical Asia. These are rangy, medium-sized landbirds. These birds have strong legs and are quite terrestrial. This group is not strongly migratory, and most species have short rounded wings, and weak flight. A few, like the streaked laughingthrush occur in fairly open habitats, but most are jungle species, difficult to observe in the dense vegetation they prefer. These are noisy birds, and the characteristic laughing calls are often the best indication that these birds are present. They frequently"
"tooth extractions. Gardner Quincy Colton Gardner Quincy Colton (February 17, 1814, Georgia, Vermont – August 9, 1898, Rotterdam, Netherlands) was an American showman, medicine man, lecturer, and former medical student who pioneered the use of nitrous oxide, or laughing gas, in dentistry. After making $535 from his first public demonstration of nitrous oxide, Colton left medical school to travel the country giving lectures and presentations. On December 10, 1844, he gave a performance in Hartford, Connecticut, at which one of his audience volunteers injured his leg, but did not feel the pain because of the effects of the gas. Connecticut"
"Evil laughter Evil laughter or maniacal laughter is a stock manic laughter by a villain in fiction. The expression ""evil laugh"" dates back to at least 1860. ""Wicked laugh"" can be found even earlier, dating back to at least 1784. Another variant, the ""sardonic laugh,"" shows up in 1714 and might date back even further. In comic books, where supervillains utter such laughs, it is variously rendered as ""mwahahaha"", ""mwhahaha"", ""muahahaha"", ""hehehehe, ""bwuhuhuhaha"", etc. ""(Compare with Ho ho ho.) These words are also commonly used on internet blogs, bulletin board systems, and games. There, they are generally used when some"