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Gum Base
Gum base is the non-nutritive, non-digestible, water-insoluble masticatory delivery system used to carry sweeteners, flavors, and any other substances in chewing gum and bubble gum. It provides all the basic textural and masticatory properties of gum. The actual composition of a gum base is usually a trade secret. The FDA allows 46 different chemicals under the umbrella of "gum base." The chemicals are posted on their website. These chemicals are grouped into the following categories. * Synthetic coagulated or concentrated latices: Polymers such as butadiene-styrene, vinyl acetate, polyethylene, paraffin, and petroleum waxes are the most commonly used gum bases on the market today. They are petroleum-derived polymers which are designed to maximize elasticity and incorporate other components of the gum base as well as flavors and sweeteners in their chemical matrix. * Plasticizing materials (softeners): These materials generally help to emulsify various chemical components that do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mastication
Chewing or mastication is the process by which food is crushed and ground by teeth. It is the first step of digestion, and it increases the surface area of foods to allow a more efficient break down by enzymes. During the mastication process, the food is positioned by the cheek and tongue between the teeth for grinding. The muscles of mastication move the jaws to bring the teeth into intermittent contact, repeatedly occluding and opening. As chewing continues, the food is made softer and warmer, and the enzymes in saliva begin to break down carbohydrates in the food. After chewing, the food (now called a bolus) is swallowed. It enters the esophagus and via peristalsis continues on to the stomach, where the next step of digestion occurs. Increasing the number of chews per bite increases relevant gut hormones. Studies suggest that chewing may decrease self-reported hunger and food intake. Chewing gum has been around for many centuries; there is evidence that northern Europ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antacid
An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach. Some antacids have been used in the treatment of constipation and diarrhea. Marketed antacids contain salts of aluminum, calcium, magnesium, or sodium. Some preparations contain a combination of two salts, such as magnesium carbonate and aluminium hydroxide (e.g. hydrotalcite). Medical uses Antacids are available over the counter and are taken by mouth to quickly relieve occasional heartburn, the major symptom of gastroesophageal reflux disease and indigestion. Treatment with antacids alone is symptomatic and only justified for minor symptoms.U.S. Department of Health & Human Services. Agency for Healthcare Research and Quality 23 September 201Consumer Summary – Treatment Options for GERD or Acid Reflux Disease: A Review of the Research for Adults Alternative uses for antacids include constipation, diarrhea, hyperphosphatemia, and urinary alkali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ester Gum
Glycerol ester of wood rosin (or gum rosin), also known as glyceryl abietate or ester gum, is an oil-soluble food additive ( E number E445). The food-grade material is used in foods, beverages, and cosmetics to keep oils in suspension in water, and its name may be shortened in the ingredient list as glycerol ester of rosin. It is also used as an ingredient in the production of chewing gum and ice cream. To make the glycerol ester of wood rosin, refined wood rosin is reacted with glycerin to produce the glycerol ester. Glycerol ester of wood rosin is an alternative to brominated vegetable oil Brominated vegetable oil (BVO) is a complex mixture of plant-derived triglycerides that have been reacted to contain atoms of the element bromine bonded to the molecules. Brominated vegetable oil is used primarily to help emulsify citrus-flavored ... in citrus oil-flavored soft drinks. In some cases, both ingredients are used together. References {{reflist External linksStandard Term ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resins
In polymer chemistry and materials science, resin is a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers. Resins are usually mixtures of organic compounds. This article focuses on naturally occurring resins. Plants secrete resins for their protective benefits in response to injury. The resin protects the plant from insects and pathogens. Resins confound a wide range of herbivores, insects, and pathogens, while the volatile phenolic compounds may attract benefactors such as parasitoids or predators of the herbivores that attack the plant. Composition Most plant resins are composed of terpenes. Specific components are alpha-pinene, beta-pinene, delta-3 carene, and sabinene, the monocyclic terpenes limonene and terpinolene, and smaller amounts of the tricyclic sesquiterpenes, longifolene, caryophyllene, and delta-cadinene. Some resins also contain a high proportion of resin acids. Rosins on the other hand are less v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyisobutylene
Polyisobutene (polyisobutylene) is a class of organic polymers prepared by polymerization of isobutene. The polymers often have the formula Me3C H2CMe2sub>nX (Me = CH3, X = H, F). They are typically colorless gummy solids. Polymerization is typically initiated with a strong Brønsted or Lewis acid. The molecular weight (MW) of the resulting polymer determines the applications. Low MW polyisobutene, a mixture of oligomers with Mns of about 500, is used as plasticizers. Medium and high MW polyisobutenes, with Mn ≥ 20,000, are components of commercial adhesives.{{cite encyclopedia , author1=Kenneth S. Whiteley , author2=T. Geoffrey Heggs , author3=Hartmut Koch , author4=Ralph L. Mawer , author5=Wolfgang Immel , title=Polyolefins , encyclopedia=Ullmann's Encyclopedia of Industrial Chemistry , year=2005 , publisher=Wiley-VCH , place=Weinheim , doi=10.1002/14356007.a21_487 See also *Butyl rubber *Polybutene Polybutene is an organic polymer made from a mixture of 1-butene, 2-butene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Butyl Rubber
Butyl rubber, sometimes just called "butyl", is a synthetic rubber, a copolymer of isobutylene with isoprene. The abbreviation IIR stands for isobutylene isoprene rubber. Polyisobutylene, also known as "PIB" or polyisobutene, (C4H8)n, is the homopolymer of isobutylene, or 2-methyl-1-propene, on which butyl rubber is based. Butyl rubber is produced by polymerization of about 98% of isobutylene with about 2% of isoprene. Structurally, polyisobutylene resembles polypropylene, but has two methyl groups substituted on every other carbon atom, rather than one. Polyisobutylene is a colorless to light yellow viscoelastic material. It is generally odorless and tasteless, though it may exhibit a slight characteristic odor. Properties Butyl rubber has excellent impermeability to gas diffusion, and the long polyisobutylene segments of its polymer chains give it good flex properties. The formula for PIB is: –(–CH2–C(CH3)2–)n– The formula for IIR is: It can be made from the mono ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Styrene/butadiene Co-polymer
Styrene-butadiene or styrene-butadiene rubber (SBR) describe families of synthetic rubbers derived from styrene and butadiene (the version developed by Goodyear is called Neolite). These materials have good abrasion resistance and good aging stability when protected by additives. In 2012, more than 5.4 million tonnes of SBR were processed worldwide. About 50% of car tires are made from various types of SBR. The styrene/butadiene ratio influences the properties of the polymer: with high styrene content, the rubbers are harder and less rubbery. SBR is not to be confused with the thermoplastic elastomer, styrene-butadiene block copolymer, although being derived from the same monomers. Types of SBR SBR is derived from two monomers, styrene and butadiene. The mixture of these two monomers is polymerized by two processes: from solution (S-SBR) or as an emulsion (E-SBR). E-SBR is more widely used. Emulsion polymerization E-SBR produced by emulsion polymerization is initiated by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jelutong (tree)
''Dyera costulata'', the jelutong, is a species of tree in the family Apocynaceae. It grows to approximately 60 metres (200 ft) tall with diameters of 2 metres (5 to 6 ft), or even to 80 m (260 ft) tall with diameters to 3 m (10 ft), and boles clear and straight for 30 m (90 ft). It grows in Malaysia, Borneo, Sumatra and southern Thailand. Its natural distribution is scattered locales in low-elevation tropical evergreen forest. In addition, jelutong can be tapped for latex and from the 1920s through the 1960s, jelutong latex was an important source of chewing gum. Jelutong has been traditionally overharvested, and is a threatened species in many areas. It is a protected species in parts of Malaysia and Thailand. The tree is grown commercially for timber. Sawdust from this species has been known to cause allergic dermatitis. Uses Jelutong is used for its wood. Along with balsa it is technically a hardwood with many properties similar t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunu (gum)
Tunu, originally Østgrønland ("East Greenland"), was one of the three counties (''amter'') of Greenland until 31 December 2008. The county seat was at the main settlement, Tasiilaq. The county's population in 2005 was around 3,800. The county was made up of two former municipalities, Ammassalik Municipality and Ittoqqortoormiit Municipality. In 1974, the Northeast Greenland National Park was created from the vast and virtually uninhabited northern part of Illoqqortoormiut Municipality. It then covered the northern half of the county. Tunu was bordered in the east by the Greenland Sea, Denmark Strait and the North Atlantic Ocean. To the west lies Kitaa, and to the north, Avannaa. In 1988, the National Park was enlarged into Avannaa (North Greenland). See also * Subdivisions of ''Norden'' * Administrative divisions of Greenland *Erik the Red's Land * Fridtjof Nansen Land *East Greenland Current *Eastern Settlement The Eastern Settlement ( non, Eystribygð ) was the firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loquat
The loquat (''Eriobotrya japonica'') is a large evergreen shrub or tree, grown commercially for its orange fruit and for its leaves, which are used to make herbal tea. It is also cultivated as an ornamental plant. The loquat is in the family Rosaceae, and is native to the cooler hill regions of south-central China. In Japan the loquat is known as biwa (枇杷, びわ) and has been grown for over 1,000 years. The loquat has been introduced to regions with subtropical to mild temperate climates throughout the world. ''Eriobotrya japonica'' was formerly thought to be closely related to the genus ''Mespilus'', and is still sometimes mistakenly known as the Japanese medlar. It is also known as Japanese plum and Chinese plum, as well as pipa in China, naspli in Malta, Lukaat in India, Lucat in Sri Lanka, níspero in Spain, nêspera in Portugal, shések in Israel, akidéné in Lebanon, Ebirangweti in Kisii and nespolo in Italy (where the name is shared with ''Mespilus germanica''). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Couma Macrocarpa
''Couma macrocarpa'', known by the common names leche caspi, leche huayo, sorva (a name it shares with its smaller relative '' Couma utilis''), and cow tree, is a species of tropical plant native to tropical, humid Central and South America from Belize to Bolivia. Ideal environmental conditions for ''Couma macrocarpa'' are: * average annual maximum temperature of 25.1 °C * average annual minimum temperature of 17.2 °C * average annual precipitation: 3,419 mm. (max) and 1,020 mm (min). It is found at variable altitudes from sea level to 1000 metres, in non-flooding areas with good drainage and in soils of good fertility. It adapts well to ultisols and oxisols and can tolerate long dry periods. In the Peruvian Amazon it is cultivated for its latex. It is grown in Loreto, San Martín, Ucayali, Madre de Dios, Huánuco, and Pasco. The sticky white latex is eaten for treating diarrhea and skin ailments. It is used for patching, sealing and to waterproof can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elastomers
An elastomer is a polymer with viscoelasticity (i.e. both viscosity and elasticity) and with weak intermolecular forces, generally low Young's modulus and high failure strain compared with other materials. The term, a portmanteau of ''elastic polymer'', is often used interchangeably with rubber, although the latter is preferred when referring to vulcanisates. Each of the monomers which link to form the polymer is usually a compound of several elements among carbon, hydrogen, oxygen and silicon. Elastomers are amorphous polymers maintained above their glass transition temperature, so that considerable molecular reconformation is feasible without breaking of covalent bonds. At ambient temperatures, such rubbers are thus relatively compliant ( E ≈ 3 M Pa) and deformable. Their primary uses are for seals, adhesives and molded flexible parts. Application areas for different types of rubber are manifold and cover segments as diverse as tires, soles for shoes, and damping an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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