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Heptadecanoic Acid
Margaric acid, or heptadecanoic acid, is a saturated fatty acid. Its molecular formula is . Classified as an odd-chain fatty acid, it occurs as a trace component of the fat and milkfat of ruminants. Salts and esters of margaric acid are called heptadecanoates. Its name is derived from the Ancient Greek μάργαρος (''márgar(on)''), meaning "pearl(y)", due to its appearance. Semiochemistry For many species, margaric acid plays a role as a semiochemical. Specifically, it possesses pheromonic and allomonic properties. Margaric acid has been identified in the subcaudal gland secretions of the European badger (''Meles meles'') and in the occipital gland secretions of male Bactrian camels (''Camelus bactrianus'') where it is one of the many pheromonic chemicals responsible for aiding in the finding and selection of mates. Margaric acid is an attractant of the khapra beetle (''Trogoderma granarium'') and the yellow fever mosquito (''Aedes aegypti'') but is a repellent of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merck Index
''The Merck Index'' is an encyclopedia of chemical substance, chemicals, pharmaceutical drug, drugs and biomolecule, biologicals with over 10,000 monographs on single substances or groups of related chemical compound, compounds published online by the Royal Society of Chemistry. History The first edition of the Merck's Index was published in 1889 by the German chemical company Merck Group, Emanuel Merck and was primarily used as a sales catalog for Merck's growing list of chemicals it sold. The American subsidiary was established two years later and continued to publish it. During World War I the US government seized Merck's US operations and made it a separate American "Merck" company that continued to publish the Merck Index. In 2012 the Merck Index was licensed to the Royal Society of Chemistry. An online version of The Merck Index, including historic records and new updates not in the print edition, is commonly available through research libraries. It also includes an append ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khapra Beetle
The khapra beetle (''Trogoderma granarium''), also called cabinet beetle, which originated in South Asia, is one of the world's most destructive pests of grain products and seeds.Stibick, J. (2007) ''New Pest Response Guidelines: Khapra Beetle'' APHIS–PPQ–Emergency and Domestic Programs, United States Department of Agriculture, Riverdale, Maryland, p. 1-1 It is considered one of the 100 worst invasive species in the world.University of Florida Food & Agricultural Services /ref> Infestations are difficult to control because of the ins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Carboxylic Acids
Carboxylic acids are organic acids characterized by a carboxyl (-COOH) functional group. The naming of these compounds is governed by IUPAC nomenclature, which ensures systematic and consistent naming of chemicals. Numerous organic compounds have other common names, often originating in historical source material thereof. The systematic IUPAC name is not always the preferred IUPAC name, for example, lactic acid is a common, and also the preferred, name for what systematic rules call 2-hydroxypropanoic acid. This list is ordered by the number of carbon atoms in a carboxylic acid. C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 {, class="wikitable" , - bgcolor="#efefef" , IUPAC name, , Common name, , Structural formula , - , hexacosanoic acid, , cerotic acid, , CH3(CH2)24COOH Carboxylic acids Carboxylic acids In organic chemistry, a carboxylic aci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Saturated Fatty Acids
Saturated fatty acids are fatty acids that make up saturated fats. Straight-chain Saturated straight-chain fatty acids: Branched-chain Saturated branched-chain fatty acids: See also *List of unsaturated fatty acids *Carboxylic acid **List of carboxylic acids *Dicarboxylic acid {{DEFAULTSORT:List Of Saturated Fatty Acids Fatty acids, Chemistry-related lists, Saturated Fatty Acids Alkanoic acids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stearic
Stearic acid ( , ) is a saturated fatty acid with an 18-carbon chain. The IUPAC name is octadecanoic acid. It is a soft waxy solid with the formula . The triglyceride derived from three molecules of stearic acid is called stearin. Stearic acid is a prevalent fatty-acid in nature, found in many animal and vegetable fats, but is usually higher in animal fat than vegetable fat. It has a melting point of °C and a pKa of 4.50. Its name comes from the Greek word στέαρ "''stéar''", which means tallow. The salts and esters of stearic acid are called stearates. As its ester, stearic acid is one of the most common saturated fatty acids found in nature and in the food supply, following palmitic acid.Gunstone, F. D., John L. Harwood, and Albert J. Dijkstra "The Lipid Handbook with Cd-Rom. 3rd ed. Boca Raton: CRC Press, 2007. , Dietary sources of stearic acid include meat, poultry, fish, eggs, dairy products, and foods prepared with fats; beef tallow, lard, butterfat, cocoa b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palmitic
Palmitic acid (hexadecanoic acid in IUPAC nomenclature) is a fatty acid with a 16-carbon chain. It is the most common saturated fatty acid found in animals, plants and microorganisms.Gunstone, F. D., John L. Harwood, and Albert J. Dijkstra. The Lipid Handbook, 3rd ed. Boca Raton: CRC Press, 2007. , Its chemical formula is , and its C:D ratio (the total number of carbon atoms to the number of carbon-carbon double bonds) is 16:0. It is a major component of palm oil from the fruit of ''Elaeis guineensis'' (oil palms), making up to 44% of total fats. Meats, cheeses, butter, and other dairy products also contain palmitic acid, amounting to 50–60% of total fats. Palmitates are the salts and esters of palmitic acid. The palmitate anion is the observed form of palmitic acid at physiologic pH (7.4). Major sources of C16:0 are palm oil, palm kernel oil, coconut oil, and milk fat. Occurrence and production Palmitic acid was discovered by saponification of palm oil, which process remains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutectic Mixture
A eutectic system or eutectic mixture ( ) is a type of a homogeneous mixture that has a melting point lower than those of the constituents. The lowest possible melting point over all of the mixing ratios of the constituents is called the ''eutectic temperature''. On a phase diagram, the eutectic temperature is seen as the eutectic point (see plot on the right). Non-eutectic mixture ratios have different melting temperatures for their different constituents, since one component's Crystal structure, lattice will melt at a lower temperature than the other's. Conversely, as a non-eutectic mixture cools down, each of its components solid, solidifies into a lattice at a different temperature, until the entire mass is solid. A non-eutectic mixture thus does not have a single melting/freezing point temperature at which it changes phase, but rather a temperature at which it changes between liquid and slush (known as the liquidus) and a lower temperature at which it changes between slush ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thespesia Populnea
''Thespesia populnea'', commonly known as the portia tree (), Pacific rosewood, Indian tulip tree, or milo, among other names, is a species of flowering plant belonging to the mallow family, Malvaceae. It is a tree found commonly on coasts around the world. Although it is confirmed to be native only to the Old World tropics, other authorities consider it to have a wider, possibly pantropical native distribution. It is thought to be an invasive species in Florida and Brazil. Distribution ''Thespesia populnea'' is native to tropical coastlines and is adapted for oceanic dispersal and growth in island environments. It is known from both coasts of Africa, tropical Asia, northern Australia, the Pacific Islands (including Hawaii), the tropical Pacific coast of the Americas from Mexico south to Colombia, the West Indies, and Florida in the United States. Its exact native distribution has been debated, with most authorities considering it to be native only to the Old World tropics, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olive Oil
Olive oil is a vegetable oil obtained by pressing whole olives (the fruit of ''Olea europaea'', a traditional Tree fruit, tree crop of the Mediterranean Basin) and extracting the oil. It is commonly used in cooking for frying foods, as a condiment, or as a salad dressing. It can also be found in some cosmetics, pharmaceuticals, soaps, and fuels for traditional oil lamps. It also has additional uses in some religions. The olive is one of three core food plants in Mediterranean cuisine, with wheat and grapes. Olive trees have been cultivated around the Mediterranean since the 8th millennium BC. In 2022, Spain was the world's largest producer, manufacturing 24% of the world's total. Other large producers were Italy, Greece, and Turkey, collectively accounting for 59% of the global market. The composition of olive oil varies with the cultivar, altitude, time of harvest, and extraction process. It consists mainly of oleic acid (up to 83%), with smaller amounts of other fatty acids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saturated And Unsaturated Compounds
A saturated compound is a chemical compound (or ion) that resists addition reactions, such as hydrogenation, oxidative addition, and the binding of a Lewis acids and bases, Lewis base. The term is used in many contexts and classes of chemical compounds. Overall, saturated compounds are less reactive than unsaturated compounds. Saturation is derived from the Latin word ''saturare'', meaning 'to fill'.An unsaturated compound is also a chemical compound (or ion) that attracts reduction reactions, such as dehydrogenation,oxidative reduction Organic chemistry Generally distinct types of unsaturated organic compounds are recognized. For hydrocarbons: *alkene (unsaturated) vs alkane (saturated) *alkyne (unsaturated) vs alkane (saturated) *arene (unsaturated) vs cycloalkane (saturated) For organic compounds containing heteroatoms (other than C and H), the list of unsaturated groups is long but some common types are: *carbonyl, e.g. ketones, aldehydes, esters, carboxylic acids (unsatura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adder
''Vipera berus'', also known as the common European adder Mallow D, Ludwig D, Nilson G (2003). ''True Vipers: Natural History and Toxinology of Old World Vipers''. Malabar, Florida: Krieger Publishing Company. . and the common European viper, Stidworthy J (1974). ''Snakes of the World''. New York: Grosset & Dunlap Inc. 160 pp. . is a species of venomous snake in the family Viperidae. The species is extremely widespread and can be found throughout much of Europe, and as far as East Asia. There are three recognised subspecies. Known by a host of common names including common adder and common viper, the adder has been the subject of much folklore in Britain and other European countries. It is not regarded as especially dangerous; the snake is not aggressive and usually bites only when really provoked, stepped on, or picked up. Bites can be very painful, but are seldom fatal. The specific name, ''berus'', is Neo-Latin and was at one time used to refer to a snake, possibly the gras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Leopard Gecko
The leopard gecko or common leopard gecko (''Eublepharis macularius'') is a ground-dwelling gecko native to the rocky dry grassland and desert regions of Afghanistan, Iran, Pakistan, India, and Nepal. The leopard gecko is a popular pet, and due to extensive captive breeding it is sometimes referred to as the first domesticated species of lizard. Taxonomy Leopard geckos were first described as a species by zoologist Edward Blyth in 1854 as ''Eublepharis macularius''. The generic name '' Eublepharis'' is a combination of the Greek words ''eu'' (good) and ''blepharos'' (eyelid), as having mobile upper and lower eyelids is the primary characteristic that distinguishes members of this subfamily from other geckos, along with a lack of lamellae. The specific name ''macularius'' derives from the Latin word ''macula'' meaning "spot" or "blemish", referring to the animal's natural spotted markings. There are five subspecies of E. macularius: *'' Eublepharis macularius afghanicus'' *'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
