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Bis(methylthio)methane
2,4-Dithiapentane is an organosulfur compound. It is a colorless liquid with a strong odor. 2,4-Dithiapentane is the dimethyl dithioacetal of formaldehyde. It is prepared by the acid-catalyzed condensation of methyl mercaptan, the main aromatic compound in both halitosis and foot odor and a secondary compound in flatulence, with formaldehyde. :2 CH3SH + H2C=O → CH3SCH2SCH3 + H2O 2,4-Dithiapentane is found as an aromatic component in some truffle varietals. A synthetic version is used as the primary aromatic additive in commercial "truffle" products, such as truffle oil, truffle butter, truffle salt, pastes, etc., many of which contain no truffle content at all. It has also been found to occur naturally in rotting wood of some species in genus Lecythis ''Lecythis'' is a genus of woody plant in the Lecythidaceae The Lecythidaceae comprise a family of about 20 genera and 250–300 species of woody plants native to tropical South America, Africa (including M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organosulfur Compound
Organosulfur compounds are organic compounds that contain sulfur. They are often associated with foul odors, but many of the sweetest compounds known are organosulfur derivatives, e.g., saccharin. Nature abounds with organosulfur compounds—sulfur is vital for life. Of the 20 common amino acids, two ( cysteine and methionine) are organosulfur compounds, and the antibiotics penicillin and sulfa drugs both contain sulfur. While sulfur-containing antibiotics save many lives, sulfur mustard is a deadly chemical warfare agent. Fossil fuels, coal, petroleum, and natural gas, which are derived from ancient organisms, necessarily contain organosulfur compounds, the removal of which is a major focus of oil refineries. Sulfur shares the chalcogen group with oxygen, selenium, and tellurium, and it is expected that organosulfur compounds have similarities with carbon–oxygen, carbon–selenium, and carbon–tellurium compounds. A classical chemical test for the detection of sulfur co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dithioacetal
In organosulfur chemistry, thioacetals are the sulfur (''thio-'') analogues of acetals (). There are two classes: the less-common monothioacetals, with the formula , and the dithioacetals, with the formula (symmetric dithioacetals) or (asymmetric dithioacetals). The symmetric dithioacetals are relatively common. They are prepared by condensation of thiols () or dithiols (two groups) with aldehydes (). These reactions proceed via the intermediacy of hemithioacetals (): #Thiol addition to give hemithioacetal: #::RSH + R'CH(O) -> R'CH(SR)OH #Thiol addition with loss of water to give dithioacetal: #::RSH + R'CH(OH)SR -> R'CH(SR)2 + H2O Such reactions typically employ either a Lewis acid or Brønsted acid as catalyst. Dithioacetals generated from aldehydes and either 1,2-ethanedithiol or 1,3-propanedithiol are especially common among this class of molecules for use in organic synthesis.P. Stütz And P. A. Stadler "3-alkylated And 3-acylated Indoles From A Common Precurso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formaldehyde
Formaldehyde ( , ) (systematic name methanal) is a naturally occurring organic compound with the formula and structure . The pure compound is a pungent, colourless gas that polymerises spontaneously into paraformaldehyde (refer to section Forms below), hence it is stored as an aqueous solution (formalin), which is also used to store animal specimens. It is the simplest of the aldehydes (). The common name of this substance comes from its similarity and relation to formic acid. Formaldehyde is an important precursor to many other materials and chemical compounds. In 1996, the installed capacity for the production of formaldehyde was estimated at 8.7 million tons per year. It is mainly used in the production of industrial resins, e.g., for particle board and coatings. Forms Formaldehyde is more complicated than many simple carbon compounds in that it adopts several diverse forms. These compounds can often be used interchangeably and can be interconverted. *Molecular formald ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methyl Mercaptan
Methanethiol (also known as methyl mercaptan) is an organosulfur compound with the chemical formula . It is a colorless gas with a distinctive putrid smell. It is a natural substance found in the blood, brain and feces of animals (including humans), as well as in plant tissues. It also occurs naturally in certain foods, such as some nuts and cheese. It is one of the chemical compounds responsible for bad breath and the smell of flatus. Methanethiol is the simplest thiol and is sometimes abbreviated as MeSH. It is very flammable. Structure and reactions The molecule is tetrahedral at the carbon atom, like methanol. It is a weak acid, with a p''K''a of ~10.4, but is about a hundred thousand times more acidic than methanol. The colorless salt can be obtained in this way: :CH3SH + CH3ONa → CH3SNa + CH3OH The resulting thiolate anion is a strong nucleophile. It can be oxidized to dimethyl disulfide: :2CH3SH + → CH3SSCH3 + H2O Further oxidation takes the disulfide to two mole ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halitosis
Bad breath, also known as halitosis, is a symptom in which a noticeably unpleasant breath odour is present. It can result in anxiety among those affected. It is also associated with depression and symptoms of obsessive compulsive disorder. The concerns of bad breath may be divided into genuine and non-genuine cases. Of those who have genuine bad breath, about 85% of cases come from inside the mouth. The remaining cases are believed to be due to disorders in the nose, sinuses, throat, lungs, esophagus, or stomach. Rarely, bad breath can be due to an underlying medical condition such as liver failure or ketoacidosis. Non-genuine cases occur when someone complains of having bad breath but other people cannot detect it. This is estimated to make up between 5% and 72% of cases. The treatment depends on the underlying cause. Initial efforts may include tongue cleaning, mouthwash, and flossing. Tentative evidence supports the use of mouthwash containing chlorhexidine or cetylpyridin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foot Odor
Foot odor (also spelled foot odour) or bromodosis is a type of body odor that affects the foot, feet of humans. It is sometimes considered to be an unpleasant smell, but can also be the target of foot fetishism, more specifically as a form of olfactophilia. It is one of the most widespread forms of olfactophilia: In a 1994 study, 45% of those with a foot fetish were found to be aroused by smelly socks and/or feet, but most importantly by the intensity of the smell produced by such bacteria. Foot odor is often caused by foot sweat and the accumulation of bacteria, which creates an odor. The odor can exhibit varying qualities depending on the state of the feet. Causes The main cause is foot Perspiration, sweat (also see focal hyperhidrosis). Sweat itself is odorless; however, it creates a beneficial environment for certain bacteria to grow, producing odorous substances. These bacteria are naturally present on our skin as part of the human flora. The front part of the foot produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flatulence
Flatulence, in humans, is the expulsion of gas from the intestines via the anus, commonly referred to as farting. "Flatus" is the medical word for gas generated in the stomach or bowels. A proportion of intestinal gas may be swallowed environmental air, and hence flatus is not entirely generated in the stomach or bowels. The scientific study of this area of medicine is termed flatology. Flatus is brought to the rectum and pressurized by muscles in the intestines. It is normal to pass flatus ("to fart"), though volume and frequency vary greatly among individuals. It is also normal for intestinal gas to have a feculent or unpleasant odor, which may be intense. The noise commonly associated with flatulence ("blowing a raspberry") is produced by the anus and buttocks, which act together in a manner similar to that of an embouchure. Both the sound and odor are sources of embarrassment, annoyance or amusement (flatulence humor). There are several general symptoms related to intest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compound Interest (website)
Compound Interest is a website launched in 2013 by Andy Brunning with infographics on everyday chemistry. The infographics describe, for example, how chemicals found in food and nature give them smell, taste, and color. The website has a monthly collaboration with the American Chemical Society. Content of the website is used as information source by various newspapers and media, including the ''Washington Post'', ''Time'', ''The Conversation'', and ''Forbes ''Forbes'' () is an American business magazine owned by Integrated Whale Media Investments and the Forbes family. Published eight times a year, it features articles on finance, industry, investing, and marketing topics. ''Forbes'' also re ...''. References {{Reflist, 30em Chemistry Infographics American science websites Science blogs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truffle
A truffle is the fruiting body of a subterranean ascomycete fungus, predominantly one of the many species of the genus ''Tuber''. In addition to ''Tuber'', many other genera of fungi are classified as truffles including ''Geopora'', ''Peziza'', ''Choiromyces'', ''Leucangium'', and over a hundred others. These genera belong to the class Pezizomycetes and the Pezizales order. Several truffle-like basidiomycetes are excluded from Pezizales, including ''Rhizopogon'' and ''Glomus''. Truffles are ectomycorrhizal fungi, so they are usually found in close association with tree roots. Spore dispersal is accomplished through fungivores, animals that eat fungi. These fungi have significant ecological roles in nutrient cycling and drought tolerance. Some truffle species are highly prized as food. French gastronome Jean Anthelme Brillat-Savarin called truffles "the diamond of the kitchen". Edible truffles are used in Italian, French and numerous other national . Truffles are cultivat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truffle Oil
Truffle oil is a modern culinary ingredient used to impart the flavor and aroma of truffles to a dish. The ingredient is commonly used as a finishing oil in a variety of dishes, including truffle fries, pasta dishes, pizzas, and puréed foods such as mashed potatoes and deviled eggs. Truffle oil is available in all seasons and is significantly less expensive than fresh truffles. This has also led to a market growth in the product and an increase in the availability of truffle-flavored foods. Truffle oil is controversial as a flavoring ingredient, as nearly all truffle oil is produced from one synthetic flavor compound, and may lack the complex flavors and aromas of fresh truffles. Composition Truffle oil can be produced using any oil. Common versions use olive oil, or a more neutral flavorless oil such as canola or grapeseed oil. Some truffle oils are made with the residue of truffles collected or prepared for sale. Many truffle oils are not made from truffles, but instead use ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truffle Butter
Truffle butter is a compound butter made with butter combined with other ingredients, including truffle A truffle is the fruiting body of a subterranean ascomycete fungus, predominantly one of the many species of the genus ''Tuber''. In addition to ''Tuber'', many other genera of fungi are classified as truffles including '' Geopora'', '' Pe ...s or synthetic truffle flavorings such as 2,4-dithiapentane. References Spreads (food) Butter {{Food-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecythis
''Lecythis'' is a genus of woody plant in the Lecythidaceae The Lecythidaceae comprise a family of about 20 genera and 250–300 species of woody plants native to tropical South America, Africa (including Madagascar), Asia and Australia. The most important member of the family in world trade is the B ... family first described as a genus in 1758. It is native to Central America and South America. Species Uses Several species produce edible seeds and referred to by a variety of common names including paradise nut, monkey pot, cream nut, and sapucaia nut. ''Lecythis zabucajo'' is perhaps the most important edible species, but the seeds of ''L. ollaria'' and ''L. pisonis'' are also used. References External linksA website with an exhaustive list of links about Lecythidaceae*Kubitzki (ed.) 2004. ''The Families and Genera of Vascular Plants. Volume VI. Flowering plants. Dicotyledons. Celastrales, Oxalidales, Rosales, Cornales, Ericales.'' Springer. Google Books: https: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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