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Gum Base
Gum base is the non-nutritive, non-digestible, water-insoluble Mastication, masticatory delivery system used to carry Sugar substitute, sweeteners, Flavoring, 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. In the United States, the FDA allows 46 different chemicals under the umbrella of "gum base". These chemicals are grouped into the following categories. * Synthetic coagulated or concentrated latices: Polymers such as Styrene-butadiene, butadiene-styrene, polyvinyl acetate, polyethylene, paraffin wax, 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 general ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mastication
Chewing or mastication is the process by which food is comminution, crushed and ground by the teeth. It is the first step in the process of digestion, allowing a greater surface area for digestive enzymes to break down the foods. 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 occlusion (dentistry), 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 (digestion), 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 stimulates the production of digestive enzymes and peptides and has been shown to increase diet-induced thermogenesis (DIT) by activating the sympa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antacid
An antacid is a substance which neutralization (chemistry), neutralizes gastric acid, 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 Salt (chemistry), salts of aluminum, calcium, magnesium, or sodium. Some preparations contain a combination of two Salt (chemistry), salts, such as magnesium carbonate and aluminum 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 treatment, symptomatic and only justified for minor symptoms. Alternative uses for antacids include constipation, diarrhea, hyperphosphatemia, and urinary alkalization. Some antacids are also used as an Adjuvant therapy, adjunct to pancreatic enzyme replacement therapy in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ester Gum
Glycerol ester of wood rosin (GEWR), also known as glyceryl abietate, gum rosin 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 (for example, from solvent extraction of aged pine stumps) 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 modified by atoms of the element bromine bonded to the fat molecules. Brominated vegetable oil has been used to help emulsify citrus-flavored bevera ... in citrus oil-flavored soft drinks. In some cases, both ingredients are used t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resins
A resin is a solid or highly viscous liquid that can be converted into a polymer. Resins may be biological or synthetic in origin, but are typically harvested from plants. Resins are mixtures of organic compounds, predominantly terpenes. Common resins include amber, hashish, frankincense, myrrh and the animal-derived resin, shellac. Resins are used in varnishes, adhesives, food additives, incenses and perfumes. Resins protect plants from insects and pathogens, and are secreted in response to injury. Resins repel herbivores, insects, and pathogens, while the volatile phenolic compounds may attract benefactors such as predators of insects 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 cont ... [...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>nH (Me = CH3). They are typically colorless gummy solids. Cationic polymerization, initiated with a strong Brønsted or Lewis acid, is the typical method for its production. 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 ... [...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 monomer ... [...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 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 free r ... [...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 to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunu (gum)
Tunu, in Danish 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). References See also * Subdivisions of ''Norden'' *Administrative divisions of Greenland Greenland is divided into five municipalities and two unincorporated areas. The municipalities are Avannaata, Kujalleq, Qeqertal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loquat
The loquat (''Eriobotrya japonica'', Chinese: 枇杷; Pinyin: pípá) is a large evergreen shrub or tree grown commercially for its orange fruit. It is also cultivated as an ornamental plant. The loquat is in the family Rosaceae, subfamily Spiraeoideae, tribe Pyreae, subtribe Pyrinae. It is native to the cooler hill regions of south-central China. In Japan, the loquat has been grown for over 1,000 years. It has been introduced to regions with subtropical to mild temperate climates throughout the world. ''Eriobotrya japonica'' formerly was thought to be closely related to the genus ''Mespilus'' and is still sometimes mistakenly known as the Japanese medlar, which is the name it takes in other European languages, such as in Spanish or in Italian. It is also known as Japanese plum and Chinese plum. Etymology The name loquat derives from Cantonese ''lou4 gwat1'' (). The phrase 'black orange' originally referred to unripened kumquats, which are dark green in color, but the name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Couma Macrocarpa
''Couma'' is a genus of flowering plants in the family Apocynaceae first described as a genus in 1775. It is native to South America and Central America Central America is a subregion of North America. Its political boundaries are defined as bordering Mexico to the north, Colombia to the southeast, the Caribbean to the east, and the Pacific Ocean to the southwest. Central America is usually .... ;Species * '' Couma catingae'' Ducke - Colombia, Venezuela, Guyana, NW Brazil * '' Couma guianensis'' Aubl. - Pará, the Guianas * '' Couma macrocarpa'' Barb.Rodr. - widespread from Belize to Bolivia * '' Couma rigida'' Müll.Arg. - Venezuela, Guyana, N Brazil * '' Couma utilis'' (Mart.) Müll.Arg. - Colombia, Venezuela, NW Brazil References Apocynaceae genera {{Apocynaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elastomers
An elastomer is a polymer with viscoelasticity (i.e. both viscosity and Elasticity (physics), elasticity) and with weak intermolecular forces, generally low Young's modulus (E) and high failure strain compared with other materials. The term, a portmanteau of ''elastic polymer'', is often used interchangeably with ''Synthetic rubber, rubber'', although the latter is preferred when referring to Vulcanization, vulcanisates. Each of the monomers which link to form the polymer is usually a compound of several Chemical elements, elements among carbon, hydrogen, oxygen and silicon. Elastomers are amorphous polymers maintained above their glass transition temperature, so that considerable Segmental motion, molecular reconformation is feasible without breaking of covalent bonds. Rubber-like solids with elastic properties are called elastomers. Polymer chains are held together in these materials by relatively weak molecule, intermolecular bonds, which permit the polymers to stretch in r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
