Asia, southeast

Linamann (an O glycoside obtained from manioc a type of yam widely distnbuted in southeast Asia)... 

Economic Aspects and Uses. Ammonium chloride is used as a nitrogen source for fertilization of rice, wheat, and other crops ia Japan, China, India, and Southeast Asia. Japan is a large producer, much of which is as by-product. 

Unlike other natural resins, shellac [9000-59-3] is derived from the hardened secretion of the lac insect (species l ccifer (Tachardia) lacca Kerr (family Coccidae), also known as Kerns lacca (Kerr)). Shellac is a refined grade of the cmde lac secretion and is the most widely known lac product. Therefore, shellac has been accepted as the common generic term. Over 50% of the world s supply is produced in the Indian provinces of Bihar and Orissa, with the remainder originating in adjacent areas of southeast Asia such as Sri Lanka, China, Thailand, and Myanmar. 

Natural mbber comes generally from southeast Asia. Synthetic mbbers are produced from monomers obtained from the cracking and refining of petroleum (qv). The most common monomers are styrene, butadiene, isobutylene, isoprene, ethylene, propylene, and acrylonitrile. There are numerous others for specialty elastomers which include acryUcs, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin, ethylene—acryUc, ethylene octene mbber, ethylene—propylene mbber, fluoroelastomers, polynorbomene, polysulftdes, siUcone, thermoplastic elastomers, urethanes, and ethylene—vinyl acetate. 

By the end of the nineteenth century, there were 2500 ha of land under mbber cultivation in Southeast Asia. The start of the automotive era shortly afterward caused a rocketing demand for mbber, and by 1910 there were 500,000 ha of mbber planted and the countries of Southeast Asia had become the main suppHers of natural mbber worldwide. 

Silicones, an important item of commerce, are widely available commercially (9,494). The principal manufacturers of silicone operate direct-process reactors to produce dimethyl dichi orosilane and, ultimately, polydimethyl siloxane. Typical plants produce more than 450 t per year. The siUcone industry is a global enterprise in the 1990s, with principal producers in the United States (Dow Coming, GE, and OSi), Europe (Wacker Chemie, Hbls, Rhc ne-Poulenc, and Bayer), and Southeast Asia (Shin-Etsu, Toshiba SiUcones, and Dow Coming, Japan). Table 15 Hsts the approximate sales of the principal producers for 1991. 

Fats and oils are treated as commodities in the open market and are purchased in bulk. As commodities, their prices fluctuate with supply and demand. Furthermore, fats and oils come in different grades that reflect different levels of processing and have industry-standardized specifications such as the American Fats and Oil Association. In the manufacture of soap in the United States, the source of animal fats is domestic whereas the vegetable oils are frequently obtained from Southeast Asia, primarily Malaysia and the Philippines. 

PS is a global product, of which North America, Western Europe, and Southeast Asia are the principal consumers (Fig. 33). Global PS production capacity generally parallels the demand for the material (Fig. 34). However, the trend siace early 1980s has been toward narrowiag the gap between capacity and demand ia an effort to maximize the profitabiUty of the busiaess. 

Skunks excrete 1-butanethiol and 2-methyl-1-butanethiol [1878-18-8] as a natural defense mechanism (12). Methanethiol is found in cheese, milk, coffee, and oysters (13—16). It is also found in the kuttin fmit, which is endemic to Southeast Asia. 

Malaria affects an estimated 270 million people and causes 2—3 million deaths annually, approximately one million of which occur in children under the age of five. While primarily an affliction of the tropics and subtropics, it has occurred as far north as the Arctic Circle. The disease essentially has been eradicated in most temperate-zone countries, but some 1100 cases of malaria in U.S. citizens returning from abroad were reported to the Centers for Disease Control during 1990. Malaria is seen today in Southeast Asia, Africa, and Central and South America. It is on the increase in Afghanistan, Brazil, China, India, Mexico, the Philippines, Sri Lanka, Thailand, and Vietnam. Escalation of the disease is because of the discontinued use of the insecticide DDT which effectively kills mosquito larvae, but has been found to be toxic to Hvestock and wildlife. Also, chloroquine (6), a reUable dmg for the prophylaxis and treatment of falcipamm malaria, is ineffective in many parts of the world because of the spread of dmg-resistant strains. 

As of January 1, 1990, the total U.S. capacity of 1-butanol was 591,000 t per year. Capacity for an additional 545,000 t per year of -butyl alcohol is operated in Western Europe and Southeast Asia (10). 

World carbon black rated capacities are shown in Table 14. North America has the largest capacity. Europe, Southeast Asia, and Russia/Eastem Europe have about equal capacities and Africa and the Middle East have only small production. The growth areas are predicted to be Southeast Asia and the Russia/Eastem Europe markets. The capacities for certain areas such as China and Russia/Eastem Europe should be taken as rough estimates. 

Worldwide capacity for production of higher aHphatic carboxyHc acids (predominantiy C8—C18), commonly called fatty acids, is about 3.5 million metric tons, with an additional 400,000 metric tons because of start-up over the next 1—2 years, mostiy in southeast Asia. Worldwide production of these higher (and linear) fatty acids in 1988 was estimated at 2.6 million metric tons, with annual growth estimated at 2—3% (8). U.S. production of these C8—C18 linear acids, including tall oil (9), was reported to be approximately 660,000 metric tons, a figure that would appear to be understated. The use of these fatty acids covets many consumer product and industrial appHcations and historically has correlated well with the GNP in the United States. 

Guayule, potentially a source of natural mbber, is an unusual crop in that it has been an article of commerce in the past. Guayule grows wild in northern Mexico and the southwestern United States. When the leaves are milled in water, a latex is released that coagulates into natural mbber worms. These can easily be collected and relatively easily refined to give a product that is almost identical to the natural mbber from southeast Asia. During World War II there were several thousand acres of guayule planted in California and a small plant estabUshed to extract the mbber for military use. After the war. 

Barnwell, J. and Wong, W., Expanders Do Payouts Offshore Nortli Sea, 5tli Offshore Southeast Asia, Singapore, Eebmary 1984. 

Natural rubber can be obtained from the sap of a number of plants and trees, the most common source is the Hevea brasiliensis tree. Although natural rubber was known in Central and South America before the arrival of Christopher Columbus in 1492, the first use as an adhesive was established in a patent dated in 1891. As rubber became an important part of the industrial revolution, the rubber adhesives market grew in importance. To comply with the increasing demand on natural rubber materials, plantations of Hevea brasiliensis trees were established in southeast Asia in the early 20th Century, mainly to supply the demand from the automobile industry. 

In other parts of the world, plywood adhesive fillers are obtained from local sources and may be quite different than those used in North America. In Southeast Asia, banana flour is quite important. In Europe, calcium carbonate (chalk) is often used. Nearly any fibrous material or fine particulate material capable of forming a functionally stable suspension can be made to work if the formulator is sufficiently skillful. However, the mix formulator will be very specific about the type and grade of filler to be used in a particular mix. Substitutions may lead to serious gluing problems. 

Bicycles are the number-one mode of transportation in the world. More than 100 million new bicycles enter the market each year and, m Southeast Asia alone, around 700 million bicycles are used daily as a means of transportation. 

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